Front hot water storage device and water heater

Abstract

The utility model relates to the technical field of water heaters, and provides a front hot water storage device and a water heater, the front hot water storage device comprises a heat exchange box, a heat preservation box and a water faucet which are communicated in sequence, and a one-way valve is arranged between the heat preservation box and the water faucet; the heat exchange box comprises a shell and a heat exchange tube, the heat exchange tube is arranged in the shell, and the two ends of the heat exchange tube extend out of the shell; a water conveying pipe of the water heater body is communicated with a water inlet of the shell and a water inlet of the heat exchange pipe through a temperature control shunt switch, and a water outlet of the heat exchange pipe is communicated with the faucet. According to the front hot water storage device, a certain amount of hot water is stored, so that a user can immediately obtain the hot water when opening a faucet, the time for waiting for the hot water to flow out is shortened, waste of water resources is reduced, and the use cost is low. The energy efficiency ratio of the water heater is ideal especially in families with long water using interval time and low water using frequency.

Description

TECHNICAL FIELD

[0001] The utility model relates to water heater technical field especially refers to a front hot water storage device and water heater. BACKGROUND

[0002] In modern large-scale residential or some centralized water supply scene, since indoor hot water pipeline system is longer, and complex, user when frequently opens hot water tap often will encounter a problem: namely after gas water heater starts, needs a period of time to heat the cold water flowing through its inside to set temperature, this period of time from water heater to water end will flow a large amount of unheated cold water, this part of cold water usually will be wasted, this not only causes water resource waste, also leads to gas energy invalid consumption. Especially in large-scale residential, since pipeline distance is long, this phenomenon is particularly obvious, therefore, an urgent need for a device can reduce hot water waiting time, reduce water resource waste. SUMMARY

[0003] In order to solve the existing technology's gas water heater starts, needs a period of time to heat the cold water flowing through its inside to set temperature, this period of time from water heater to water end will flow a large amount of unheated cold water, this part of cold water usually will be wasted, this not only causes water resource waste, also leads to gas energy invalid consumption's technical problem, the utility model embodiment provides a front hot water storage device and water heater. The technical scheme is as follows:

[0004] On the one hand, a front hot water storage device is provided, the device includes: heat exchange box, heat preservation box and faucet communicated in sequence, and one-way valve is arranged between the heat preservation box and the faucet;

[0005] The heat exchange box includes a shell and a heat exchange pipe, the heat exchange pipe is arranged in the shell, and both ends of the heat exchange pipe extend out of the shell;

[0006] The water pipe of the water heater body is communicated with the water inlet of the shell and the water inlet of the heat exchange pipe through the temperature control shunt switch, and the water outlet of the heat exchange pipe is communicated with the faucet.

[0007] The temperature control shunt switch can switch between the water inlet of the shell and the water inlet of the heat exchange pipe, and the temperature control shunt switch is also used to switch to the water inlet of the heat exchange pipe when detecting that the water temperature is higher than the preset temperature.

[0008] Optionally, it further includes a controller;

[0009] The heat preservation box is provided with a water level sensor, and the controller is in communication connection with the water level sensor and the temperature control shunt switch;

[0010] When the water level sensor detects that the water level in the heat preservation box is lower than the preset water level, the temperature control shunt switch opens the water inlet of the shell, and the water inlet flow can drive the gas water heater body to automatically start.

[0011] Optionally, the heat preservation box is a sealed box body, and compressed air is arranged in the heat preservation box.

[0012] Optionally, a pressure regulator is arranged on the heat preservation box.

[0013] Optionally, a visual window is arranged on the heat preservation box.

[0014] Optionally, the heat exchange box further comprises a cleaning port, and the cleaning port is arranged on the side wall of the shell.

[0015] Optionally, a filter is arranged at the water inlet of the heat preservation box, and is used for filtering the water quality entering the heat preservation box.

[0016] Optionally, the heat exchange box, the heat preservation box and the faucet are all mounted under the washbasin through a fixing support.

[0017] Optionally, the connecting pipelines between the heat exchange box, the heat preservation box and the faucet are all wrapped with heat preservation materials.

[0018] In one aspect, the application further provides a water heater comprising a water heater body and the front hot water storage device, and a water delivery pipe of the water heater body is connected to the heat exchange box of the front hot water storage device.

[0019] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0020] The front hot water storage device provided by the application stores a certain amount of hot water, so that the user can immediately obtain hot water when opening the faucet, the time for waiting for hot water to flow out is reduced, the waste of water resources is reduced, the water heater is energy-saving and environment-friendly, and the use cost is low. Especially in a family with long water use interval and low water use frequency, the energy efficiency ratio of the water heater is very ideal. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a structure schematic view of a front hot water storage device provided by the embodiment of the application.

[0023] Figure 2 is one of the use process diagrams of the front hot water storage device provided in the embodiment of the utility model;

[0024] Figure 3 is the second use process diagram of the front hot water storage device provided in the embodiment of the utility model;

[0025] Figure 4 is the third use process diagram of the front hot water storage device provided in the embodiment of the utility model.

[0026] Reference signs:

[0027] 1, heat exchange box; 11, shell; 12, heat exchange pipe;

[0028] 2, heat preservation box; 21, water level sensor;

[0029] 3, faucet;

[0030] 4, one-way valve;

[0031] 5, temperature control shunt switch;

[0032] 6, water delivery pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the utility model will be described below in combination with the drawings.

[0034] In the embodiments of the utility model, the words such as "example" and "for example" are used to represent an example, illustration or explanation. Any embodiment or design scheme described as "example" in the utility model should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the word example is used to present the concept in a specific way. In addition, in the embodiments of the utility model, the meaning expressed by "and / or" can be both, or can be either one of the two.

[0035] In order to make the technical problems, technical solutions and advantages of the utility model clearer, the following will be described in detail in combination with the drawings and specific embodiments.

[0036] For domestic water and the like in a large-sized house, the faucet often needs to be frequently started and stopped, and in order to use hot water, the starting of the faucet will also drive the starting of the gas water heater, therefore, the gas water heater also needs to be frequently started and stopped. Moreover, the water temperature of the commonly used water heater after heating for a period of time can be relatively high, and the user generally needs to use the cold water in the water pipe in combination. After using the water once, when the user opens the faucet next time, the user needs to first discharge a large amount of cold water before being able to use hot water, which not only needs a long hot water waiting time, but also is not energy-saving and environment-friendly.

[0037] The utility model embodiment provides a kind of front hot water storage device, Figure 1 It is the structure schematic diagram of the front hot water storage device provided in the utility model embodiment, please refer to Figure 1 The device includes: heat exchange box 1, heat preservation box 2 and faucet 3 are communicated in turn, and one-way valve 4 is arranged between heat preservation box 2 and faucet 3.

[0038] Heat exchange box 1 includes shell 11 and heat exchange pipe 12, heat exchange pipe 12 is arranged in shell 11, the passage for accommodating water flow is formed in the heat exchange pipe 12, and the water flow can also be accommodated between shell 11 and heat exchange pipe 12.Based on the wall of heat exchange pipe 12, the water inside and outside heat exchange pipe 12 can be heat exchanged.And the two ends of heat exchange pipe 12 extend out of shell 11, so as to be connected with other pipelines.

[0039] Water pipe 6 of water heater body is communicated with the water inlet of shell 11 and the water inlet of heat exchange pipe 12 through temperature control shunt switch 5, the water outlet of heat exchange pipe 12 is communicated with faucet 3, and the water heated by heat exchange pipe 12 can flow to faucet 3 through this path.

[0040] Temperature control shunt switch 5 can be switched between the water inlet of shell 11 and the water inlet of heat exchange pipe 12, and temperature control shunt switch 5 is also used to switch to the water inlet of heat exchange pipe 12 when detecting that the water temperature is higher than the preset temperature.It should be noted that temperature control shunt switch 5 is usually connected with water heater body in communication, so as to control the start of water heater body to heat.In this embodiment, whether faucet 3 is used or not is not related to temperature control shunt switch 5.Through temperature control shunt switch 5, water flow can be closed or switched to directly enter shell 11 or pass through heat exchange pipe 12.

[0041] Please refer to Figure 2 , Figure 2 Arrow in the figure indicates water flow direction, when faucet is opened by user in use, temperature control shunt switch 5 will not be triggered, and the water in heat preservation box 2 will be directly used by user.Only when the preset condition is reached, temperature control shunt switch 5 is opened, water flow enters shell 11, and then enters heat preservation box 2 to supplement, user continues to use warm water in heat preservation box 2, and cold water in water pipe 6 flows into shell 11.

[0042] Please refer to Figure 3 , Figure 3 Arrow in the figure indicates water flow direction.This part of cold water flows into shell 11, is heated by the residual heat of heat exchange pipe 12, and then flows to heat preservation box 2.Meanwhile, the warm water stored in heat preservation box 2 flows out of faucet 3.The utility model can heat this part of water by heat exchange pipe 12, and store this part of water by heat preservation box 2.

[0043] Of course, the condition of opening the temperature control shunt switch 5 can be set according to the needs, and the embodiment is not limited to this. The purpose of this setting is that even if the user frequently opens and closes the faucet, the temperature control shunt switch 5 and the water heater body do not need to be frequently started, avoiding the damage to the water heater body and achieving the energy saving effect.

[0044] Continuing the use process described above, it is obvious that when the water temperature transported by the water pipe 6 is lower than or equal to the preset temperature, the control temperature control shunt switch 5 is switched to the shell 11. When the cold water flow in the water pipe 6 is exhausted and hot water begins to flow out, that is, when the water temperature transported by the water pipe 6 is higher than the preset temperature, the control temperature control shunt switch 5 is switched to the heat exchange pipe 12. As can be seen, the water temperature in the heat exchange pipe 12 is usually higher than the water temperature outside the heat exchange pipe 12. Therefore, the heat exchange pipe 12 can play a role in heating the water outside the heat exchange pipe 12.

[0045] Please refer to Figure 4 , Figure 4 The arrow indicates the direction of water flow. Based on the temperature control shunt switch 5, this part of high-temperature water can pass through the heat exchange pipe 12 and then flow to the faucet 3. The water flowing in the heat exchange pipe 12 can be directly used by the user after cooling, avoiding the trouble of adding cold water.

[0046] Since the shell 11, the heat preservation box 2, and the faucet 3 are sequentially connected, the heated water in the shell 11 can flow into the heat preservation box 2, and the heat preservation box 2 plays a heat preservation role after the water is turned off. At the same time and for a period of time thereafter, the high-temperature water can be used to heat the water stored in the shell 11 to increase the water temperature. The preset temperature can be set according to the needs, for example, it can be 40℃.

[0047] Specifically, the temperature control shunt switch is an automatic control element. It produces a conduction or disconnection action through internal physical deformation or electronic element sensing according to the temperature change of the working environment, thereby realizing the control of the flow direction or flow of the fluid.

[0048] It should be noted that the thickness of the heat exchange pipe 12 has a significant effect on the heat exchange speed. The thickness of the pipe wall directly affects the thermal resistance and heat exchange efficiency of the heat exchange pipe 12. A thicker pipe wall will increase the thermal resistance, slow down the heat transfer speed in the pipe wall, and thus reduce the heat exchange efficiency. Conversely, a thinner pipe wall can reduce the thermal resistance and improve the efficiency of heat transfer. Therefore, in the embodiment, the wall of the heat exchange pipe 12 can have a certain thickness, and by designing the thickness of the wall of the heat exchange pipe 12, the heat exchange speed of the water inside and outside the heat exchange pipe 12 can be controlled. In the embodiment, the thickness of the heat exchange pipe 12 can be determined according to the interval time length of opening the faucet 3 twice, so that the water in the heat exchange pipe 12 still maintains a high temperature when the faucet 3 is opened next time, so as to heat the cold water flowing into the shell 11.

[0049] For the faucet 3 which needs to be frequently started and stopped, the above process is cyclic, so the residual heat of the hot water output by the gas water heater can be used to heat the cold water stored in the water pipe 6 after the next opening of the faucet 3, thereby avoiding the waste of the cold water and reducing the waiting time of the hot water.

[0050] The front hot water storage device provided by the utility model can store a certain amount of hot water, so that the user can obtain hot water immediately when opening the faucet, the time for waiting for hot water to flow out is reduced, the waste of water resources is reduced, the water heater is energy-saving and environment-friendly, and the use cost is low. Especially in a family with long water use interval and low water use frequency, the energy efficiency ratio of the water heater is very ideal.

[0051] In one embodiment provided by the utility model, the heat preservation box 2 is used for storing hot water and keeping the water temperature within a certain range. The water heater further comprises a controller, and a water level sensor 21 is arranged in the heat preservation box 2, the water level sensor 21 is used for monitoring the water level in the heat preservation box 2 in real time. The controller is in communication connection with the water level sensor 21 and the temperature control shunt switch 5. When the water level sensor 21 detects that the water level in the heat preservation box 2 is lower than the preset water level, the temperature control shunt switch 5 opens the water inlet of the shell 11, and the water inflow can drive the gas water heater body to start automatically.

[0052] Specifically, when the water level in the heat preservation box 2 decreases to be lower than the preset water level due to use or other reasons, the water level sensor 21 can immediately detect the change and send a low water level signal to the controller. The controller can receive the water level information sent by the water level sensor 21 and send a signal to the temperature control shunt switch 5, and the temperature control shunt switch 5 sends a heating signal to the water heater body and turns on the water pipe 6 and the shell 11 to supplement the water quantity in the heat preservation box 2 and keep the water temperature.

[0053] This design not only improves the intelligent level of the water heater, but also ensures that the user can obtain stable and reliable heat source when using hot water. At the same time, by accurately controlling the heating process, energy can be saved to a certain extent, and the energy efficiency of the water heater can be improved.

[0054] Specifically, the heat preservation box 2 usually has a heat preservation layer to reduce the influence of the external environment on the temperature in the box, and is heat-preserved and energy-saving. Specifically, the material of the heat preservation layer is various, for example, it can be foamed plastic, glass fiber or vacuum heat insulation board, etc. Among them, the foamed plastic includes polyurethane foam, polystyrene foam, etc., which has good heat insulation performance and light weight. The glass fiber heat preservation material has excellent heat insulation performance and corrosion resistance, and is suitable for various environments. The vacuum heat insulation board: the vacuum heat insulation board realizes high-efficiency heat insulation effect by evacuating the internal air and filling the heat preservation material.

[0055] Further, the heat exchange box 1 is provided with the same heat preservation layer as the heat preservation box 2 to realize the heat preservation and energy saving effects.

[0056] In a further embodiment of the present application, the heat preservation box 2 is a sealed box body, and compressed air is arranged in the heat preservation box 2. The sealed box body can avoid heat loss and prevent pollution. It should be noted that the original air in the heat preservation box 2 can be normal pressure. After the water flows in, the water occupies the space in the heat preservation box 2, and the air is compressed in the upper part, and then the heat preservation box automatically stores compressed air to provide power for the water flow out. The role of the compressed air is that when the water faucet 3 is opened, the compressed air can push the water in the heat preservation box 2 to flow out, without additional power.

[0057] In an embodiment of the present application, a pressure regulator is arranged on the heat preservation box 2.

[0058] The pressure regulator is used for monitoring and adjusting the pressure in the heat preservation box 2. This device can sense the pressure change in the heat preservation box 2, and adjust the pressure as needed to ensure that the water pressure in the heat preservation box 2 is equal to the water pressure in the water pipe.

[0059] When the pressure in the heat preservation box 2 increases due to water temperature rise or other reasons, the pressure regulator will detect this change. If the pressure exceeds the preset safety range, the pressure regulator will automatically start to reduce the pressure in the heat preservation box 2 by releasing part of the steam or other mechanisms. Conversely, if the pressure in the heat preservation box 2 is too low, the pressure regulator can also take measures to increase the pressure to maintain the stability of the system. The pressure regulator can also reduce the system fluctuations caused by pressure changes, thereby improving the stability and reliability of the system.

[0060] In an embodiment of the present application, a visible window is arranged on the heat preservation box 2. The visible window can be a piece of transparent or translucent material, such as glass, plastic, etc., installed on one side or top of the heat preservation box 2, allowing users to see the inside of the heat preservation box 2 from the outside. Users can observe the water level in the heat preservation box 2 through the visible window to determine whether to add water or adjust the heating strategy of the water heater.

[0061] In an embodiment of the present application, the heat exchange box 1 further comprises a cleaning port arranged on the side wall of the shell 11 for conveniently cleaning and maintaining the inside of the heat exchange box 1. The arrangement of the cleaning port can ensure that the heat exchange box 1 remains efficient and clean during long-term operation, thereby improving its service life and performance.

[0062] In one embodiment of the utility model, the water inlet of the heat preservation box 2 is provided with a filter for filtering the water quality entering the heat preservation box 2, removing impurities, particles or pollutants in the fluid, ensuring that the water quality in the heat preservation box 2 remains clean and meets the standards, thereby improving the use effect and safety of the heat preservation box 2.

[0063] In one embodiment of the utility model, the faucet 3 is also connected with the cold water pipe, and the faucet 3 is provided with a temperature adjusting knob for adjusting the water temperature after mixing cold and hot water.

[0064] The faucet 3 is used for adjusting and distributing water flow, and the heat preservation box 2 and the heat exchange pipe 12 can both serve as a hot water source. By rotating the knob, the user can change the mixing ratio between cold water and hot water, thereby obtaining the required water temperature. The user adjusts the water temperature as needed, thereby obtaining a comfortable water flow experience.

[0065] In one embodiment of the utility model, it further comprises a fixed support for supporting and fixing other objects. The heat exchange box 1, the heat preservation box 2 and the faucet 3 are all installed under the washbasin through the fixed support. Such installation not only saves space, but also makes the whole system more tidy and easy to maintain.

[0066] Further, the fixed support has an adjusting function, and the height and angle of each component of the water heater can be adjusted according to the installation position.

[0067] In any one of the above embodiments of the utility model, the connecting pipes between the heat exchange box 1, the heat preservation box 2 and the faucet 3 are all wrapped with heat preservation materials. These pipes are responsible for transporting hot water from the heat exchange box 1 to the heat preservation box 2, and then providing the user with hot water through the faucet 3. The heat preservation material can reduce the loss of heat during transmission, thereby improving energy efficiency and maintaining stable water temperature.

[0068] The preposed hot water storage device provided by the utility model can store a certain amount of hot water, so that the user can immediately obtain hot water when opening the faucet, reduce the waiting time for hot water to flow out, and reduce the waste of water resources. At the same time, the water heater is also energy-saving and environmentally friendly, and has low use cost. Especially in families with long water use interval and low water use frequency, the energy efficiency ratio of such water heater is very ideal.

[0069] Further, by using efficient insulation materials and technology, it is ensured that the hot water stored in the device can maintain a high temperature when not in use, reducing heat loss and the resulting waste of water resources caused by long-distance transmission of pipelines. Compared with the traditional backwater system, the device should be designed to be more energy efficient, especially during non-continuous water use period, by automatically adjusting the working mode through the controller, only starting or maintaining hot water state when necessary, thereby greatly saving electric energy and gas consumption. Moreover, considering the actual operation convenience of the user, the device should be designed to be easily installed on the existing pipeline system, while providing a convenient maintenance interface to ensure reliability and user-friendliness during long-term use.

[0070] The utility model also provides a water heater, including water heater body and above-mentioned any kind of pre -hot water storage device, water heater body's water pipe is linked together pre -hot water storage device's heat exchange box.

[0071] The water heater provided by the utility model stores a certain amount of hot water, so that the user can immediately obtain hot water when opening the faucet, reduces the time of waiting for hot water to flow out, reduces the waste of water resources, and the water heater is also energy-saving and environment-friendly and has low use cost. Especially in the family with long water use interval and low water use frequency, the energy efficiency ratio of the water heater is very ideal.

[0072] It should be understood that the term "and / or" herein merely describes an association relationship of associated objects, and indicates that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone, wherein A and B can be singular or plural. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects, but can also represent an "and / or" relationship, which can be understood according to the context before and after.

[0073] In the utility model, "at least one" means one or more, and "a plurality of" means two or more. "At least one (or similar expression) of the following" means any combination of these items, including any combination of single item (or plural items). For example, at least one of a, b, or c can represent a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple.

[0074] It should be understood that in various embodiments of the utility model, the size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the utility model.

[0075] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pre-heat water storage device, characterized by, The device comprises a heat exchange tank, a heat preservation tank and a faucet connected in sequence, and a one-way valve is arranged between the heat preservation tank and the faucet. The heat exchange tank comprises a shell and a heat exchange pipe arranged in the shell, and both ends of the heat exchange pipe extend out of the shell. A water inlet of the shell, a water inlet of the heat exchange pipe and a water outlet of the heat exchange pipe are respectively communicated with a water inlet pipe of a water heater body through a temperature control shunt switch. The temperature control shunt switch can switch between the water inlets of the shell and the heat exchange pipe, and the temperature control shunt switch is also used to switch to the water inlet of the heat exchange pipe when detecting that the water temperature is higher than a preset temperature.

2. The pre-heat water storage device of claim 1, wherein Further comprising: a controller; The heat preservation tank is provided with a water level sensor, and the controller is in communication connection with the water level sensor and the temperature control shunt switch. When the water level sensor detects that the water level in the heat preservation tank is lower than a preset water level, the temperature control shunt switch opens the water inlet of the shell, and the water inlet flow can drive the gas water heater body to automatically start.

3. The pre-heat water storage device of claim 1, wherein, The heat preservation tank is a sealed tank, and compressed air is arranged in the heat preservation tank.

4. The pre-heat water storage device of claim 3, wherein, A pressure regulator is arranged on the heat preservation tank.

5. The pre-heat water storage device of claim 1, wherein, A visual window is arranged on the heat preservation tank.

6. The pre-heat water storage device of claim 1, wherein, The heat exchange tank further comprises a cleaning port arranged on the side wall of the shell.

7. The pre-heat water storage device of claim 1, wherein, A filter is arranged at the water inlet of the heat preservation tank for filtering the water quality entering the heat preservation tank.

8. The pre-heat water storage device of claim 1, wherein, Further comprising: A fixed support, the heat exchange tank, the heat preservation tank and the faucet are all installed under the washbasin through the fixed support.

9. Pre-heat water storage device according to any of the claims 1 to 8, characterized in that The connecting pipelines between the heat exchange tank, the heat preservation tank and the faucet are all wrapped with heat preservation materials.

10. A water heater, characterized by The device comprises a heat exchange tank, a heat preservation tank and a faucet connected in sequence, and a one-way valve is arranged between the heat preservation tank and the faucet. The heat exchange tank comprises a shell and a heat exchange pipe arranged in the shell, and both ends of the heat exchange pipe extend out of the shell. A water inlet of the shell, a water inlet of the heat exchange pipe and a water outlet of the heat exchange pipe are respectively communicated with a water inlet pipe of a water heater body through a temperature control shunt switch. The temperature control shunt switch can switch between the water inlets of the shell and the heat exchange pipe, and the temperature control shunt switch is also used to switch to the water inlet of the heat exchange pipe when detecting that the water temperature is higher than a preset temperature. Further comprising: a controller; The heat preservation tank is provided with a water level sensor, and the controller is in communication connection with the water level sensor and the temperature control shunt switch. When the water level sensor detects that the water level in the heat preservation tank is lower than a preset water level, the temperature control shunt switch opens the water inlet of the shell, and the water inlet flow can drive the gas water heater body to automatically start. The heat preservation tank is a sealed tank, and compressed air is arranged in the heat preservation tank. A pressure regulator is arranged on the heat preservation tank. A visual window is arranged on the heat preservation tank. The heat exchange tank further comprises a cleaning port arranged on the side wall of the shell. A filter is arranged at the water inlet of the heat preservation tank for filtering the water quality entering the heat preservation tank. Further comprising: A fixed support, the heat exchange tank, the heat preservation tank and the faucet are all installed under the washbasin through the fixed support. The connecting pipelines between the heat exchange tank, the heat preservation tank and the faucet are all wrapped with heat preservation materials. including a water heater body and the front water storage device of any one of claims 1 to 9, and a water inlet pipe of the water heater body is communicated with a heat exchange tank of the front water storage device.

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