Hot tank and water supply device

Abstract

The utility model discloses a hot tank and a water supply device thereof.The hot tank comprises a hot tank body, an inner cavity of a hollow structure is formed in the hot tank body, and the inner cavity is used for storing a heat exchange medium; the end part of the heat exchange medium extraction pipe extends into the inner cavity, and the heat exchange medium extraction pipe is used for extracting an upper-layer heat exchange medium in the inner cavity; the end part of the heat exchange medium return pipe extends into the inner cavity, and the heat exchange medium return pipe is used for enabling a heat exchange medium to flow back into the inner cavity; wherein the pipe diameter of the heat exchange medium return pipe is larger than that of the heat exchange medium extraction pipe, and the heat exchange medium return pipe is used for reducing water flow disturbance, water flow impact and vibration in the heat tank and ensuring that the temperature field in the heat tank body is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drinking water equipment, in particular to a heat tank and a water supply device. BACKGROUND

[0002] In the drinking water equipment industry, the heat tank, as a key component for heating and storing hot water, plays a crucial role in ensuring that users can quickly obtain drinking water at a suitable temperature. Traditional heat tank designs usually include an internal heat exchange medium circulation system that uses water or other high-efficiency heat-conducting liquids as heat exchange media. After being heated to a certain temperature in the heating device, the heat exchange media enter the heat exchanger through specific pipes. In the heat exchanger, the high-temperature heat exchange media exchange heat with the externally input cold water, thereby achieving the first heating of the drinking water. This process greatly improves heating efficiency and ensures rapid response to user demand.

[0003] The working principle of the heat tank is based on heat conduction. Through the circulation of internal heat exchange media, heat is efficiently and uniformly transferred to the externally entering drinking water, significantly improving the speed and efficiency of drinking water heating. This design not only meets the user's demand for instant hot water, but also optimizes energy utilization and reduces unnecessary energy consumption.

[0004] However, despite the significant achievements of traditional heat tanks in improving heating efficiency, they still face some challenges in actual application. In particular, when the heat tank performs backwater operation, the pipe diameter of the backwater pipeline is usually small, causing significant water flow disturbance in the tank. This not only affects the stability of the temperature field inside the heat tank, but also may cause safety hazards such as water flow impact, vibration, and possible equipment damage. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the present application provides a heat tank for reducing water flow disturbance in the heat tank and ensuring temperature field stability. The second purpose is to provide a water supply device. To achieve one or part or all of the above purposes or other purposes, the present application provides a heat tank comprising a heat tank body, an inner cavity in a hollow structure formed in the heat tank body, the inner cavity for storing heat exchange media;

[0006] A heat exchange medium extraction pipe for extracting heat exchange media.

[0007] A heat exchange medium return pipe, the end of the heat exchange medium return pipe extending into the inner cavity, for returning heat exchange media to the inner cavity.

[0008] Wherein, the pipe diameter of the heat exchange medium return pipe is greater than the pipe diameter of the heat exchange medium extraction pipe.

[0009] According to the above technical scheme, the heat tank body is a hollow structure, which mainly functions to store heat exchange medium. After being heated, the heat exchange medium is introduced into the heat exchanger to exchange heat with drinking water, so as to rapidly heat the drinking water. The design of the heat tank body can effectively maintain the temperature of the medium to meet the demand of the drinking water equipment for hot water. The end of the extraction pipe extends into the inner cavity to extract the upper layer of the heat exchange medium in the inner cavity. The heat exchange medium extraction pipe plays its role, and its end extends into the inner cavity to extract the heat exchange medium in the upper layer of the inner cavity. The heat exchange medium extraction pipe can efficiently extract heat exchange medium with a higher temperature. The extracted high-temperature heat exchange medium is then sent to the heat exchanger to exchange heat with the cold water input from outside, so as to realize the first temperature rise of the drinking water. After the heat exchange, the heat exchange medium is returned to the inner cavity through the heat exchange medium return pipe. The pipe diameter of the heat exchange medium return pipe is designed to be larger than that of the heat exchange medium extraction pipe. This design aims to reduce the flow rate and impact force of the medium during return, thereby effectively reducing the water flow disturbance in the heat tank, ensuring the stability of the temperature field, and continuously and efficiently providing drinking water with a suitable temperature to meet the instant demand of the user, while ensuring the stable operation and safety of the equipment.

[0010] Further, the heat exchange medium return pipe extends from the upper end of the heat tank body to the bottom of the heat tank body.

[0011] Further, the heat exchange medium return pipe comprises a first pipe body and a second pipe body, the first pipe body and the second pipe body are in communication; in the vertical direction, the second pipe body is below the first pipe body, and the pipe diameter of the second pipe body is larger than that of the first pipe body.

[0012] Further, the water outlet end of the second pipe body is close to the bottom of the heat tank body.

[0013] Further, the number of the first pipe bodies is one or more.

[0014] When the number of the first pipe bodies is more than one, the first pipe bodies are connected end to end.

[0015] Further, the water outlet end of the second pipe body is connected with a fluid buffer structure.

[0016] Further, the fluid buffer structure comprises a mounting head and a horn cover, the horn cover is fixed to the mounting head, and the heat exchange medium can enter the horn cover through the mounting head.

[0017] The longitudinal section of the horn cover is in a structure of small at the top and large at the bottom.

[0018] Further, an installation hole is formed in the mounting head and communicates with the horn cover, an inner thread is arranged on the installation hole, an outer thread is arranged on the outer periphery of the second pipe body, and the inner thread is matched with the outer thread.

[0019] Further, the second pipe body is integrally formed with the fluid buffer structure.

[0020] In another aspect, the application further provides a water supply device, which comprises a shell and a heat exchange assembly arranged in the shell.

[0021] The heat exchange assembly comprises a heat exchanger.

[0022] The heat exchanger is connected with the heat tank for heat exchange.

[0023] The application has the following beneficial effects:

[0024] The heat tank body is designed as a hollow structure to store heat exchange medium, and the heat exchange medium is used to heat drinking water after being heated, so that the drinking water can be quickly heated to meet the demand of the drinking water equipment for hot water.

[0025] The heat tank body is arranged on the mounting frame, the mounting frame ensures stable installation of the heat tank body, the heat preservation frame provides additional safety protection, heat loss is reduced, and the overall design enhances the safety and reliability of the heat tank. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description.

[0027] Wherein:

[0028] Figure 1 It is a schematic view of a split structure of the heat tank in one direction.

[0029] Figure 2It is another direction split structure schematic view of the hot pot of the utility model;

[0030] Figure 3 It is the local split structure schematic view of the hot pot body of the utility model;

[0031] Figure 4 It is the structure schematic view of the heat exchange medium return pipe in the hot pot body of the utility model;

[0032] Figure 5 It is the three-dimensional structure schematic view of the heat exchange medium return pipe and fluid buffer structure in the hot pot body of the utility model;

[0033] Figure 6 It is the plane structure schematic view of the heat exchange medium return pipe and fluid buffer structure in the hot pot body of the utility model;

[0034] Figure 7 It is the whole structure schematic view of the water supply device of the utility model;

[0035] Figure 8 It is the structure schematic view of the water supply device of the utility model after splitting;

[0036] Figure 9 It is the heat exchange assembly structure schematic view of the water supply device of the utility model;

[0037] Figure 10 It is the waterway schematic view of the water supply device of the utility model;

[0038] Among them, the hot pot body 1, the heat exchange cylinder 11, the end cover 12, the mounting frame 13, the heat preservation frame 14, the heat exchange medium extraction pipe 2, the heat exchange medium return pipe 3, the first pipe body 31, the second pipe body 32, the fluid buffer structure 33, the mounting head 331, the mounting hole 3311, the horn cover 332, the drain pipe 4, the shell 5, the heat exchange assembly 6, the heat exchanger 61, the drinking water inlet interface 611, the drinking water outlet interface 612, the heat exchange water inlet interface 613, the heat exchange water outlet interface 614, the first pipe 71, the second pipe 72, the third pipe 73, the heater 8, the fourth pipe 81, the water pump 84. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0040] The embodiment provides a hot pot, such as Figure 1 、 Figure 2 、 Figure 3As shown, including heat tank body 1, heat exchange medium extraction pipe 2 and heat exchange medium return pipe 3, the inner cavity with hollow structure is formed in heat tank body 1, the inner cavity is used for storing heat exchange medium, the heat exchange medium is used for heat exchange of drinking water after being heated, the function of fast heating drinking water is achieved, to meet the demand of drinking water equipment for hot water; The end of heat exchange medium extraction pipe 2 and heat exchange medium return pipe 3 extends into the inner cavity, wherein heat exchange medium extraction pipe 2 is used for extracting the upper heat exchange medium of the inner cavity, heat exchange medium return pipe 3 is used for conveying the heat exchange medium after heat exchange to the inner cavity to form a circulating loop.

[0041] Wherein, the pipe diameter of heat exchange medium return pipe 3 is greater than the pipe diameter of heat exchange medium extraction pipe 2, the pipe diameter of heat exchange medium return pipe 3 is relatively large, so as to reduce the flow rate and impact force when the medium returns, thereby effectively reducing the water flow disturbance in the heat tank, and also avoiding the influence of the heat exchange medium with lower temperature on the heat exchange medium with higher temperature in the upper layer, ensuring the stability of the temperature field. Through such a circulating process, the heat tank can continuously and efficiently heat the drinking water to meet the instant demand of the user, while ensuring the stable operation and safety of the equipment.

[0042] According to the above technical solution, the main function of heat tank body 1 is to store and heat heat exchange medium, the heat exchange medium is introduced into heat exchanger 61 after being heated to heat exchange drinking water, the function of fast heating drinking water is achieved, the design of heat tank body 1 can effectively maintain the temperature of the medium to meet the demand of drinking water equipment for hot water, heat exchange medium extraction pipe 2 plays its role, its end extends into the inner cavity and is located in the upper part of the inner cavity, and extracts the heat exchange medium in the upper layer of the inner cavity; Heat exchange medium extraction pipe 2 can efficiently extract heat exchange medium with higher temperature, and the extracted high-temperature heat exchange medium is then sent into heat exchanger 61 to exchange heat with the cold drinking water input from outside, to realize the first temperature rise of drinking water, and after heat exchange, the heat exchange medium is returned to the inner cavity through heat exchange medium return pipe 3.

[0043] As a preferred embodiment, heat exchange medium return pipe 3 extends from the upper end of heat tank body 1 to the bottom of heat tank body 1, as shown in Figure 4 、 Figure 5 and Figure 6As shown, the heat exchange medium return pipe 3 comprises a first pipe body 31 and a second pipe body 32, the first pipe body 31 is in communication with the second pipe body 32; in the vertical direction, the second pipe body 32 is below the first pipe body 31, the pipe diameter of the second pipe body 32 is larger than that of the first pipe body 31, and the water outlet end of the second pipe body 32 (i.e. the bottom end of the second pipe body 32) is close to the bottom of the heat tank body 1. This design aims to reduce the flow rate and impact force when the heat exchange medium returns, and the reduction of flow rate helps to reduce the erosion of the heat exchange medium to the internal structure of the heat tank body 1, thereby effectively reducing the water flow disturbance inside the heat tank body 1. When the heat exchange medium is heated, the heated heat exchange medium will move upwards, and the differential design of the pipe diameter makes the water return process more stable, which helps to maintain the uniform distribution of the temperature field inside the heat tank, and also avoids the influence of the lower-temperature heat exchange medium at the bottom on the upper-layer higher-temperature heat exchange medium. Through such a circulation process, the heat tank body 1 can continuously and efficiently heat the drinking water to meet the immediate needs of users, while ensuring the stable operation and safety of the equipment.

[0044] As a preferred embodiment, the number of the first pipe body 31 is one or more; when the number of the first pipe body 31 is more than one, each first pipe body 31 is connected end to end.

[0045] As a preferred embodiment, the water outlet end of the second pipe body 32 is connected with a fluid buffer structure 33; the fluid buffer structure 33 comprises a mounting head 331 and a horn cover 332, the horn cover 332 is fixed to the mounting head 331, the heat exchange medium can enter the horn cover 332 through the mounting head 331, the longitudinal section of the horn cover 332 is in a structure of small at the top and large at the bottom, and the mounting head 331 is provided with a mounting hole 3311 in communication with the horn cover 332.

[0046] In one embodiment, the second pipe body 32 and the fluid buffer structure 33 are integrally formed, that is, the bottom of the second pipe body 32 is connected with the mounting head 331 in a fixed manner, such as welding, riveting, etc.

[0047] In another embodiment, the mounting hole 3311 is provided with an internal thread, the outer periphery of the second pipe body 32 is provided with an external thread, the internal thread is matched with the external thread, the mounting head 331 of the embodiment is in a detachable connection with the second pipe body 32, which facilitates the replacement of the fluid buffer structure 33 to slow down the flow rate; when the heat exchange medium flows out of the second pipe body 32 and enters the horn cover 332 through the mounting head 331, the flow rate of the medium will gradually decrease due to the gradually increasing cross-sectional area of the horn cover 332, which utilizes the basic principle of fluid mechanics, i.e., when the flow rate is constant, the increase of the cross-sectional area of the pipe will result in the decrease of the flow rate. Therefore, through the introduction and special design of the fluid buffer structure 33, the flow rate of the heat exchange medium is effectively slowed down, which reduces the erosion of the heat exchange medium to the internal structure of the heat tank body 1, reduces the water flow disturbance in the heat tank body 1, and improves the overall performance and stability of the heat tank.

[0048] As a preferred embodiment, as shown in Figure 1 The heat tank body 1 is provided with a drain pipe 4, the drain pipe 4 extends into the inner cavity, and the end of the drain pipe 4 is located at the bottom position of the inner cavity. According to the above technical solution, in the heat tank body 1, the drain pipe 4 is designed to extend into the inner cavity, and the end thereof is located at the bottom position of the inner cavity, which ensures that the drain pipe 4 can effectively drain the impurities, sediments or excess heat exchange medium accumulated in the inner cavity; when the inner cavity needs to be cleaned or maintained, the drain pipe 4 can be opened to allow the liquid or impurities accumulated at the bottom to flow out smoothly, since the drain pipe 4 is located at the bottom, it can ensure that the residues in the inner cavity are removed to the maximum extent, keeping the inner cavity clean and the medium pure. In addition, the drain pipe 4 can also be used to quickly discharge the heat exchange medium in the heat tank under certain circumstances, for example, when the system needs to be shut down or repaired in an emergency, not only the maintenance convenience of the heat tank is improved, but also the overall safety and reliability thereof are enhanced.

[0049] The pipe diameter of the drain pipe 4 is smaller than that of the heat exchange medium return pipe 3. The pipe diameter of the drain pipe 4 is designed to be smaller than that of the heat exchange medium return pipe 3, which ensures that the heat exchange medium can smoothly and stably enter the inner cavity when flowing back, and the drain pipe 4 is responsible for discharging the liquid or impurities accumulated at the bottom at a slower flow rate, which can prevent disturbance caused by rapid discharge to a certain extent.

[0050] As a preferred embodiment, as shown in Figure 3As shown, the heat tank body 1 includes a heat exchange cylinder 11 and two end covers 12, which are respectively fixedly arranged at the two ends of the heat exchange cylinder 11, and the two end covers 12 and the heat exchange cylinder 11 jointly enclose an inner cavity. The heat tank body 1 is the core component of the water supply device, which is mainly composed of the heat exchange cylinder 11 and the two end covers 12. The heat exchange cylinder 11 serves as the main part of the heat tank body 1 and is usually made of high-strength and corrosion-resistant materials to ensure that it can withstand high-temperature and high-pressure working environments. The two end covers 12 are arranged at the two ends of the heat exchange cylinder 11 and are tightly connected with the heat exchange cylinder 11 through sealing structures such as flange connection, threaded connection, etc. to form an inner cavity structure for storing heat exchange medium. This design not only ensures that the medium (such as water, steam, heat exchange oil, etc.) inside the heat tank body 1 does not leak to the outside environment, but also prevents external impurities from entering the heat tank body 1, ensuring the normal operation of the heat tank body 1 and the purity of the medium.

[0051] As a preferred embodiment, as shown in the drawings, Figure 1 As shown, the heat tank body 1 is externally provided with a mounting rack 13 and a heat preservation frame 14, the heat preservation frame 14 is wrapped around the outer periphery of the heat tank body 1, and the heat tank body 1 is fixedly installed on the mounting rack 13. The mounting rack 13 serves as the support structure of the heat tank body 1, ensuring that the heat tank body 1 can be stably installed at the desired position and maintaining its stability. The heat preservation frame 14 is tightly wrapped around the outer periphery of the heat tank body 1 and plays a heat preservation role. The heat preservation frame 14 is made of high-efficiency heat insulation materials, which can effectively reduce heat loss and ensure that the heat exchange medium in the inner cavity maintains a constant high-temperature state. This not only improves the heating efficiency of the heat tank, but also reduces energy consumption.

[0052] As a preferred embodiment, as shown in the drawings, Figure 10 As shown, the heat exchange medium extraction pipe 2 and / or the heat exchange medium return pipe 3 is provided with a water pump 84. The water pump 84 is arranged on the heat exchange medium extraction pipe 2 or the heat exchange medium return pipe 3, which mainly provides power to force the heat exchange medium to circulate in the pipeline. Through the driving of the water pump 84, the heat exchange medium can enter and exit the inner cavity more efficiently, achieving the effect of heat exchange and improving the overall performance of the heat tank.

[0053] On the other hand, as shown in the drawings, Figures 7 to 10 The utility model also provides a water supply device, which comprises a shell 5 and a heat exchange assembly 6, the heat exchange assembly 6 is arranged in the shell 5, and the heat exchange assembly 6 comprises a heat exchanger 61.

[0054] Further comprising a first pipeline 71 unit, which is arranged in the shell 5;

[0055] The heat exchanger 61 is provided with a first flow channel, a drinking water inlet interface 611, a drinking water outlet interface 612, a second flow channel, a heat exchange water inlet interface 613 and a heat exchange water outlet interface 614; the first flow channel is in communication with the drinking water inlet interface 611 and the drinking water outlet interface 612, and the second flow channel is in communication with the heat exchange water inlet interface 613 and the heat exchange water outlet interface 614.

[0056] The first pipeline 71 unit includes the first pipeline 71, the second pipeline 72 and the third pipeline 73; the first pipeline 71 is in communication with the drinking water inlet interface 611, one end of the second pipeline 72 is in communication with the drinking water outlet interface 612, the other end of the second pipeline 72 is connected with the heater 8, and the heater 8 is connected with the third pipeline 73. According to the above technical scheme, the drinking water inlet interface 611, the drinking water outlet interface 612, the heat exchange water inlet interface 613 and the heat exchange water outlet interface 614 are provided on the heat exchanger 61, which provides necessary flow channels for heat exchange between the heat medium and the drinking water; when starting to operate, the drinking water first enters the first flow channel in the heat exchanger 61 through the drinking water inlet interface 611, and the heat exchange medium enters the second flow channel in the heat exchanger 61 through the heat exchange water inlet interface 613; the first flow channel and the second flow channel are close to each other and not in communication, but the heat exchange medium in the second flow channel exchanges heat with the drinking water in the first flow channel, and heat exchange is carried out in the heat exchanger 61; in this process, the heat exchange medium transfers heat to the drinking water, so that the temperature of the drinking water gradually rises, realizing the preheating effect and facilitating the provision of hot drinking water in a large amount and at a high speed; the preheated drinking water then flows out of the heat exchanger 61 through the drinking water outlet interface 612 and is guided to the heater 8 through the second pipeline 72 of the first pipeline 71 unit for further heating; at the same time, the heat exchange medium in the second flow channel flows into the heat medium return pipe 3 through the heat exchange water outlet interface 614 and finally enters the middle or bottom of the heat tank body 1 through the heat medium return pipe 3.

[0057] The fourth pipeline 81 is further included, and a bottom end of the fourth pipeline 81 is in communication with the heat medium extraction pipe 2; since the heat medium in the heat tank body 1 is evaporated by heating and is lost, the liquid level needs to be supplemented when it drops to a certain position, so the fourth pipeline 81 is connected with an external water pipe for supplementing the heat medium in the heat tank body 1, and a valve 10 is arranged on the fourth pipeline 81; it needs to be noted that when the heat tank body 1 introduces the heat medium into the heat exchanger 61, the valve 10 on the fourth pipeline 81 needs to be closed.

[0058] In working, the heat medium in the heat tank body 1 enters the heat tank body 1 through the fourth pipeline 81 (in the state that the valve 10 is opened), then the valve 10 is closed, and the heat medium of the heat tank body 1 is pushed by the water pump 4 to flow into the heat exchanger 61, in the heat exchanger 61, the heat medium exchanges heat with the drinking water, transmits heat to the drinking water and preheats the drinking water, and then the preheated heat medium returns to the heat tank body 1 through the heat medium return pipeline 3, and a cycle period is completed. Through continuous circulation and preheating, the water supply device provided by the utility model can efficiently utilize the heat energy in the heat medium and quickly and massively provide the user with the drinking water with suitable temperature.

[0059] The above only discloses the preferred embodiments of the present application, and of course cannot limit the scope of the right of the present application, so the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A thermal tank, characterized by, The heat tank comprises: a heat tank body (1) in which an inner cavity in a hollow structure is formed, and the inner cavity is used for storing heat exchange medium; a heat exchange medium extraction pipe (2) used for extracting heat exchange medium; a heat exchange medium return pipe (3) whose end extends into the inner cavity and is used for returning heat exchange medium into the inner cavity; wherein the pipe diameter of the heat exchange medium return pipe (3) is greater than the pipe diameter of the heat exchange medium extraction pipe (2).

2. The thermal tank of claim 1, wherein: The end of the heat exchange medium extraction pipe (2) extends into the inner cavity, and / or the heat exchange medium return pipe (3) extends from the upper end of the heat tank body (1) to the bottom of the heat tank body (1).

3. The thermal tank of claim 2, wherein: The heat exchange medium return pipe (3) comprises a first pipe body (31) and a second pipe body (32), and the first pipe body (31) and the second pipe body (32) are in communication; in the vertical direction, the second pipe body (32) is below the first pipe body (31), and the pipe diameter of the second pipe body (32) is greater than the pipe diameter of the first pipe body (31).

4. The thermal tank of claim 3, wherein: The water outlet end of the second pipe body (32) is close to the bottom of the heat tank body (1).

5. The thermal tank of claim 3, wherein: The number of the first pipe body (31) is one or more; When the number of the first pipe body (31) is more than one, each first pipe body (31) is connected end to end.

6. The thermal tank of claim 3, wherein: The water outlet end of the second pipe body (32) is connected with a fluid buffer structure (33).

7. The thermal tank of claim 6, wherein: The fluid buffer structure (33) comprises a mounting head (331) and a horn cover (332), and the horn cover (332) is fixed to the mounting head (331), and heat exchange medium can enter the horn cover (332) through the mounting head (331); The longitudinal section of the horn cover (332) is in a structure of small at the top and large at the bottom.

8. The thermal tank of claim 7, wherein: An installation hole (3311) in communication with the horn cover (332) is formed in the mounting head (331), an internal thread is arranged on the installation hole (3311), an external thread is formed on the outer periphery of the second pipe body (32), and the internal thread is matched with the external thread.

9. The thermal tank of claim 7, wherein: The second pipe body (32) and the fluid buffer structure (33) are integrally formed.

10. A water supply device characterized by comprising: The heat tank comprises: a heat tank body (1) in which an inner cavity in a hollow structure is formed, and the inner cavity is used for storing heat exchange medium; a heat exchange medium extraction pipe (2) used for extracting heat exchange medium; a heat exchange medium return pipe (3) whose end extends into the inner cavity and is used for returning heat exchange medium into the inner cavity; wherein the pipe diameter of the heat exchange medium return pipe (3) is greater than the pipe diameter of the heat exchange medium extraction pipe (2). The end of the heat exchange medium extraction pipe (2) extends into the inner cavity, and / or the heat exchange medium return pipe (3) extends from the upper end of the heat tank body (1) to the bottom of the heat tank body (1). The heat exchange medium return pipe (3) comprises a first pipe body (31) and a second pipe body (32), and the first pipe body (31) and the second pipe body (32) are in communication; in the vertical direction, the second pipe body (32) is below the first pipe body (31), and the pipe diameter of the second pipe body (32) is greater than the pipe diameter of the first pipe body (31). The water outlet end of the second pipe body (32) is close to the bottom of the heat tank body (1). The number of the first pipe body (31) is one or more; When the number of the first pipe body (31) is more than one, each first pipe body (31) is connected end to end. The water outlet end of the second pipe body (32) is connected with a fluid buffer structure (33). The fluid buffer structure (33) comprises a mounting head (331) and a horn cover (332), and the horn cover (332) is fixed to the mounting head (331), and heat exchange medium can enter the horn cover (332) through the mounting head (331); The longitudinal section of the horn cover (332) is in a structure of small at the top and large at the bottom. An installation hole (3311) in communication with the horn cover (332) is formed in the mounting head (331), an internal thread is arranged on the installation hole (3311), an external thread is formed on the outer periphery of the second pipe body (32), and the internal thread is matched with the external thread. The second pipe body (32) and the fluid buffer structure (33) are integrally formed. The heat tank comprises: a heat tank body (1) in which an inner cavity in a hollow structure is formed, and the inner cavity is used for storing heat exchange medium; a heat exchange medium extraction pipe (2) used for extracting heat exchange medium; a heat exchange medium return pipe (3) whose end extends into the inner cavity and is used for returning heat exchange medium into the inner cavity; wherein the pipe diameter of the heat exchange medium return pipe (3) is greater than the pipe diameter of the heat exchange medium extraction pipe (2).

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