A hot water tank heating device

Abstract

The application relates to the technical field of hot water tank heating, and discloses a hot water tank heating device, which comprises a tank body, a steam pipeline, a liquid inlet pipeline and a pressure balance assembly. The tank body is provided with an accommodating cavity, and heating pipes are spirally arranged in the accommodating cavity. The steam pipeline comprises a steam pipeline and a steam valve. One end of the steam pipeline penetrates through the tank body and extends into the accommodating cavity and is connected with the inlet of the heating pipe. The liquid inlet pipeline comprises a liquid inlet pipeline and a liquid inlet valve. One end of the liquid inlet pipeline is connected with the liquid inlet of the tank body, and the other end is used for connecting a liquid source. The pressure balance assembly comprises a pressure balance pipeline and an overflow pipeline. One end of the pressure balance pipeline extends into the accommodating cavity and is immersed in liquid, and the other end is exposed outside the accommodating cavity. One end of the overflow pipeline is connected with the part of the pressure balance pipeline which is exposed outside the accommodating cavity. The hot water tank heating device can prevent the steam generated by heating in the tank body from escaping, reduce the loss of heat loss with steam, and significantly improve the thermal efficiency of the heating process.

Description

Technical Field

[0001] This application relates to the field of hot water tank heating technology, and more particularly to a hot water tank heating device. Background Technology

[0002] Hot water tanks are a common piece of equipment in industrial production. To maintain a stable temperature inside the tank at a set level (e.g., 70°C), heating steam needs to be introduced into the tank to heat the cold water. However, during the direct or indirect heating process, the water inside the tank evaporates, generating steam, which can easily lead to an increase in pressure inside the tank. This causes some of the steam to escape from the water, resulting in reduced thermal efficiency and increased energy consumption. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a hot water tank heating device, which aims to solve the problem that the current hot water tank's steam escape leads to reduced thermal efficiency and increased energy consumption.

[0004] This application provides a hot water tank heating device, comprising: A tank body, which is defined to form a receiving cavity for containing liquid, wherein heating tubes are spirally distributed in the receiving cavity; A steam pipeline includes a steam pipe and a steam valve installed on the steam pipe. One end of the steam pipe passes through the tank and extends into the receiving cavity, and is connected to the inlet of the heating pipe. The other end of the steam pipe is used to connect to a steam source. The steam valve is used to control the on / off state of the steam pipeline. The liquid inlet pipeline includes a liquid inlet pipe and a liquid inlet valve installed on the liquid inlet pipe. One end of the liquid inlet pipe is connected to the liquid inlet of the tank body, and the other end is used to connect to a liquid source. The liquid inlet valve is used to control the opening and closing of the liquid inlet pipe. A pressure balancing assembly includes a pressure balancing tube and an overflow tube. One end of the pressure balancing tube extends into the receiving cavity and is submerged in the liquid, while the other end protrudes outside the receiving cavity for communication with the external atmosphere. One end of the overflow tube is connected to the portion of the pressure balancing tube that protrudes outside the receiving cavity.

[0005] In one embodiment, a hot water supply pipeline is also included, which includes a hot water output pipeline, a power pump, and an output valve. One end of the hot water output pipeline is connected to the liquid outlet of the tank. The power pump and the output valve are connected in sequence to the hot water output pipeline. The power pump is used to provide the power required to transport hot water, and the output valve is used to control the on / off state of the hot water output pipeline.

[0006] In one embodiment, a hot water return pipeline is also included, which includes a hot water return line and a first return valve. One end of the hot water return line is connected to the receiving cavity, and the other end is connected to the outlet of the hot water user device to return the used hot water to the receiving cavity. The hot water return line is connected to a first return valve that controls its on / off state.

[0007] In one embodiment, the system further includes a pressure transmitter, a venting line, and a discharge valve connected to the venting line. One end of the venting line is connected to the receiving cavity, and the other end protrudes outside the receiving cavity. The venting line is also connected to the overflow pipe. The pressure transmitter is connected to the receiving cavity and is used to monitor the pressure inside the receiving cavity.

[0008] In one embodiment, a circulation pipeline is further included, one end of which is connected to the receiving cavity and the other end of which is connected to the hot water output pipeline, and a circulation valve for controlling its on / off state is connected to the circulation pipeline.

[0009] In one embodiment, a condensate return pipeline is further included, which includes a main return pipeline and a second return valve. One end of the main return pipeline is connected to the outlet of the heating pipe, and the other end is connected to the return port of the tank. The second return valve is connected to the main return pipeline and is used to control the on / off state of the main return pipeline.

[0010] In one embodiment, the condensate return pipeline further includes a return branch pipeline, a third return valve, a fourth return valve, and a fifth return valve. The fourth and fifth return valves are sequentially connected to the main return pipeline along the flow direction of the condensate return pipeline. The second return valve is located between the fourth and fifth return valves. The return branch pipeline is connected in parallel with the main return pipeline, and the connection point between the outlet end of the return branch pipeline and the main return pipeline is located downstream of the fifth return valve. The third return valve is connected to the return branch pipeline.

[0011] In one embodiment, the system further includes a steam bypass line and a temperature detector. The steam bypass line is connected in parallel with the steam line, and a regulating valve for controlling its on / off state is connected to the steam bypass line. The temperature detector is installed on the inner wall of the tank and electrically connected to the regulating valve for monitoring the temperature inside the tank.

[0012] The technical solutions provided in this application have the following advantages compared with the prior art: By incorporating spirally distributed heating tubes within the tank and supplying steam through a steam delivery line while simultaneously introducing liquid into the tank via a liquid inlet line, heat exchange occurs between the liquid and the heating tubes, rapidly heating the liquid to the set temperature. With the continuous introduction of steam, the liquid temperature within the tank is maintained within the set range. Furthermore, a pressure balancing pipe, with one end inserted into the containment cavity and submerged in the liquid, and the other end connected to the atmosphere, allows for the smooth release of pressure only through the liquid, achieving a dynamic balance between the pressure within the tank and the atmospheric pressure. This prevents the steam generated during heating from escaping, reducing heat loss and significantly improving the thermal efficiency of the heating process. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] In the attached image: Figure 1 This is a schematic diagram of the structure of a hot water tank heating device according to this application.

[0016] Icon labels: 10. Tank body; 10a. Receiving cavity; 20. Heating pipe; 30. Steam pipeline; 31. Steam line; 32. Steam valve; 40. Liquid inlet pipeline; 41. Liquid inlet pipeline; 42. Liquid inlet valve; 50. Pressure balancing assembly; 51. Pressure balancing pipe; 52. Overflow pipe; 60. Hot water usage pipeline; 61. Hot water output pipeline; 62. Power pump; 63. Output valve; 70. Hot water return pipeline; 71. Hot water return pipeline; 72. 80. First reflux valve; 90. Pressure transmitter; 100. Drain line; 110. Discharge valve; 120. Circulation line; 130. Circulation valve; 131. Condensate reflux line; 132. Main reflux line; 133. Second reflux valve; 134. Reflux branch line; 135. Fifth reflux valve; 136. Third reflux valve; 140. Steam bypass branch line; 150. Temperature detector; 160. Regulating valve. Detailed Implementation

[0017] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0018] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0020] Please refer to Figure 1This application provides a hot water tank heating device, which includes a tank body 10, a steam pipeline 30, a liquid inlet pipeline 40, and a pressure balancing assembly 50. The tank body 10 defines a receiving cavity 10a for containing liquid. A heating tube 20 is installed in the receiving cavity 10a and is connected to the steam pipeline 30, so that after steam is introduced into the heating tube 20 through the steam pipeline 30, the heat of the steam can be quickly transferred to the liquid in the receiving cavity 10a for heat exchange, thereby increasing the temperature of the liquid in the tank body 10. In addition, the heating tube 20 is spirally distributed, which can increase the contact area between the heating tube 20 and the liquid in the receiving cavity 10a, thereby improving the heat exchange efficiency between steam and liquid and reducing the steam consumption per unit heating amount.

[0021] The steam pipeline 30 includes a steam pipe 31 and a steam valve 32 installed on the steam pipe 31. One end of the steam pipe 31 passes through the tank 10 and extends into the receiving cavity 10a, and is connected to the inlet of the heating pipe 20. The other end of the steam pipe 31 is used to connect to a steam source, and the steam valve 32 is used to control the opening and closing of the steam pipe 31. In other words, when heating the liquid in the hot water tank, steam is circulated into the heating pipe 20 through the steam pipe 31, and the amount of steam supplied can be controlled by adjusting the opening of the steam valve 32. This allows for precise temperature control within the tank 10. For example, when the temperature of the liquid in the tank 10 is lower than the target value, the opening of the steam valve 32 can be increased to supply more steam into the heating pipe 20 for heat exchange with the liquid, thereby achieving rapid heating to the preset temperature. When the temperature of the liquid in the tank 10 reaches the preset temperature value (e.g., 70°C), the opening of the steam valve 32 is reduced to decrease the amount of steam supplied into the heating pipe 20. This prevents the liquid temperature from becoming too high due to continuous heating and also prevents the liquid temperature from dropping due to insufficient steam supply, thus ensuring that the liquid temperature in the tank 10 remains within the set range.

[0022] The liquid inlet line 40 includes a liquid inlet pipe 41 and a liquid inlet valve 42. One end of the liquid inlet pipe 41 is connected to the liquid inlet of the tank 10, and the other end is used to connect to a liquid source, so that liquid can be replenished into the receiving cavity from the liquid source. In addition, a liquid inlet valve 42 is connected to the liquid inlet pipe 41 to control the opening and closing of the liquid inlet pipe 41, so that a rapid response can be made when an abnormal liquid level occurs in the tank 10. For example, if the liquid level in the receiving cavity is too low, the liquid inlet valve 42 is opened to keep the liquid inlet pipe 41 in a conducting state, thereby replenishing liquid into the receiving cavity 10a, so as to avoid the heating tube 20 not contacting the liquid due to the low liquid level, resulting in the inability of the heat of the steam in the heating tube 20 to be exchanged with the liquid, causing energy loss; if the liquid level in the receiving cavity 10a is too high, the liquid inlet valve 42 can be closed to reduce the liquid entering the receiving cavity and prevent liquid from overflowing from the tank 10 and causing waste.

[0023] When the liquid in the receiving cavity 10a exchanges heat with the steam in the heating pipe 20, the liquid absorbs heat and its temperature rises to a preset temperature. During this process, some of the liquid evaporates into steam. Since the tank 10 is a relatively enclosed space, the steam generated by evaporation accumulates inside the tank 10, causing the internal pressure of the tank 10 to rise. This causes some of the steam generated by evaporation to escape, carrying away some heat and resulting in energy loss. At the same time, the escaped steam carries water droplets, which can affect the indoor ceiling or environment. To address this, a pressure balancing component 50 is provided in this embodiment. The pressure balancing component 50 includes a pressure balancing pipe 51 and an overflow pipe 52. One end of the pressure balancing pipe 51 extends into the receiving cavity 10a and is submerged in the liquid, while the other end protrudes outside the receiving cavity 10a to communicate with the external atmosphere. One end of the overflow pipe 52 is connected to the portion of the pressure balancing pipe 51 that protrudes outside the receiving cavity 10a.

[0024] In other words, when the pressure inside the tank 10 increases, the excess pressure is released to the atmosphere through the pressure balancing pipe 51, preventing abnormal pressure accumulation. Since the end of the pressure balancing pipe 51 extending into the receiving cavity 10a is submerged in the liquid, pressure release is only allowed through a smooth flow of liquid, thus achieving a dynamic balance between the pressure inside the tank 10 and the atmosphere. The steam generated by heating the liquid inside the tank 10 will not escape, reducing heat loss with steam and significantly improving the thermal efficiency of the heating process. Furthermore, the overflow pipe 52 is connected to the pressure balancing pipe 51 so that when the pressure inside the tank 10 becomes excessively high due to water replenishment or evaporation imbalance, the liquid can rise through the pressure balancing pipe 51 to the overflow pipe 52 for discharge. This prevents liquid from overflowing the tank 10, avoiding waste or safety hazards, and does not interfere with the pressure regulation of the pressure balancing pipe 51. Additionally, the end of the pressure balancing pipe 51 protruding outside the receiving cavity 10a is bent to form a bend.

[0025] It should be noted that although part of the pressure balancing pipe 51 extends outside the tank 10 and the overflow pipe 52 is located outside the tank, since only part of the pressure balancing pipe 51 is inserted below the liquid surface, its contact area with the liquid surface is small. Therefore, the heat transferred from the liquid to the atmosphere through the pressure balancing pipe 51 and the overflow pipe 52 is minimal, even negligible, and does not result in heat loss. In practical applications, the pressure balancing pipe 51 can be made of a material with poor thermal conductivity, further reducing heat loss.

[0026] Furthermore, in this embodiment, the outlet end of the pressure balancing pipe 51 has a bend, and the portion extending outside the tank 10 is at a certain height (e.g., 1m) above the liquid level inside the tank. The condition for hot water discharge is that the pressure of the gas above the liquid level inside the tank is greater than the pressure of the liquid column at this height (e.g., 1m of liquid column corresponds to a pressure of 0.1 bar). In actual use, the liquid level inside the tank 10 is controlled to be lower than the pressure required to discharge hot water from the pressure balancing pipe 51, thus preventing the liquid inside the tank 10 from being discharged from the outlet of the pressure balancing pipe 51. Simultaneously, because the heat from the water vapor generated by heating inside the tank 10 is absorbed by the liquid within a certain time and liquefies into water, the pressure of the gas above the liquid level also decreases.

[0027] In summary, the hot water tank heating device of this application, by setting spirally distributed heating pipes 20 inside the tank body 10 and introducing steam into the heating pipes 20 through a steam delivery pipeline, and cooperating with the liquid inlet pipeline 40 to introduce liquid into the tank body 10, allows the liquid to exchange heat with the heating pipes 20 upon contact, thereby rapidly heating the liquid in the tank body 10 to the set temperature. With the continuous introduction of steam, the temperature of the liquid in the tank body 10 is maintained within the set range. Furthermore, by using a pressure balancing pipe 51, one end extends into the receiving cavity 10a and is submerged in the liquid, while the other end is connected to the atmosphere, allowing only the liquid to be smoothly discharged during pressure release. This achieves a dynamic balance between the pressure inside the tank body 10 and the atmosphere, while the steam generated during heating inside the tank body 10 does not escape, reducing heat loss with the steam and significantly improving the thermal efficiency of the heating process.

[0028] In one embodiment, a hot water supply pipeline 60 is also included. The hot water supply pipeline 60 includes a hot water output pipeline 61, a power pump 62, and an output valve 63. One end of the hot water output pipeline 61 is connected to the liquid outlet end of the tank 10. The power pump 62 and the output valve 63 are connected to the hot water output pipeline 61 in sequence. The power pump 62 is used to provide the power required to transport hot water, and the output valve 63 is used to control the opening and closing of the hot water output pipeline 61.

[0029] In practical applications, when hot water is needed, the output valve 63 is opened to connect the hot water output pipe 61. Under the action of the power pump 62, the hot water in the tank 10 flows out through the hot water output pipe 61 for use. When hot water is not needed, the output valve 63 is closed to cut off the hot water output pipe 61, and the power pump 62 is turned off to prevent hot water leakage when not in use, thereby reducing the ineffective loss of hot water and reducing the additional energy consumption caused by repeated liquid replenishment and heating. It should be noted that the control of opening or closing the output valve 63 and the power pump 62 is common knowledge to those skilled in the art and will not be described in detail in this embodiment.

[0030] Furthermore, the hot water output of the hot water supply pipeline 60 and the replenishment of the liquid supply pipeline 40 can form a dynamic coordination. When the output valve 63 is opened and the power pump 62 starts to output hot water, causing the liquid level in the tank 10 to drop, the liquid supply valve 42 can be opened as needed to replenish the liquid, so as to maintain the liquid level in the tank 10 at a reasonable position. At the same time, by balancing the pressure inside the tank, it avoids sudden pressure changes caused by liquid level fluctuations due to hot water output, ensuring that the heating tube 20 is always immersed in the liquid for efficient heat exchange, ensuring that the heating process is not disturbed by hot water output, and maintaining the continuous stability of temperature and pressure inside the tank.

[0031] In one embodiment, a hot water return line 70 is also included. The hot water return line 70 includes a hot water return pipe 71 and a first return valve 72. One end of the hot water return pipe 71 is connected to the receiving cavity 10a, and the other end is connected to the outlet of the hot water user equipment to return the used hot water to the receiving cavity 10a. The hot water return pipe 71 is connected to the first return valve 72 to control its opening and closing. In this way, by opening the first return valve 72, the hot water flowing out of the outlet of the hot water user equipment (still retaining a certain temperature and not completely cooled) is returned to the receiving cavity 10a, so that the waste heat of this part of the hot water can be reused. Compared with directly discharging the used hot water and replenishing the low-temperature liquid through the liquid inlet pipe 40, the returned hot water can reduce the steam consumption required to heat from low temperature to the target temperature and reduce the energy loss of the heating process.

[0032] In one embodiment, the system further includes a pressure transmitter 80, a drain line 90, and a discharge valve 100 connected to the drain line 90. One end of the drain line 90 is connected to the receiving cavity 10a, and the other end is exposed outside the receiving cavity 10a. The drain line 90 is also connected to the overflow pipe 52. The pressure transmitter 80 is connected to the receiving cavity 10a and is used to monitor the pressure inside the receiving cavity 10a.

[0033] In other words, the pressure transmitter 80 is connected to the receiving cavity 10a to monitor pressure changes within the cavity 10a in real time. Based on these pressure changes, the drain valve is opened, allowing the liquid in the receiving cavity 10a to be quickly discharged through the drain pipe 90, thus achieving active pressure reduction. Furthermore, when the amount of hot water returning to the tank 10a via the hot water return pipe 71 exceeds the amount of hot water being used, the pressure in the receiving cavity 10a will increase. At this time, the pressure transformer will detect the increased pressure and then control the drain valve to open, discharging and recovering the excess hot water to stabilize the liquid level in the tank within the normal range.

[0034] In one embodiment, a circulation pipe 110 is also included. One end of the circulation pipe 110 is connected to the receiving cavity 10a, and the other end is connected to the hot water output pipe 61. A circulation valve 120 is connected to the circulation pipe 110 to control its opening and closing. In this way, the receiving cavity 10a and the hot water output pipe 61 are connected by the circulation pipe 110. When the circulation valve 120 is opened, the power pump 62 of the hot water use pipe 60 can drive some hot water to flow back from the output pipe to the receiving cavity 10a, forming a circulation flow. This prevents temperature stratification caused by local heating (such as higher water temperature near the heating pipe 20 and lower water temperature in areas far from the heating pipe 20) or stagnation in the tank 10, and ensures that the hot water in the tank is fully mixed. This ensures that the hot water temperature output to the user end is always stable at the target value, avoiding the impact of temperature fluctuations on the usage effect.

[0035] In one embodiment, a condensate return pipeline 130 is also included. The condensate return pipeline 130 includes a main return line 131 and a second return valve 132. One end of the main return line 131 is connected to the outlet of the heating pipe 20, and the other end is connected to the return port of the tank 10. The second return valve 132 is connected to the main return line 131 to control its opening and closing. That is, the steam introduced into the heating pipe 20 condenses into condensate after exchanging heat with the liquid in the receiving cavity 10a. By connecting the main return line 131 to the outlet of the heating pipe 20, the condensate can be returned to the receiving cavity 10a, thereby replenishing the liquid in the receiving cavity 10a and realizing the recycling of water resources. In addition, although most of the heat is released after the steam heat exchange, the condensate still contains a certain amount of heat. This allows the residual heat in the condensate returning to the receiving cavity 10a to be absorbed and utilized again, reducing the heat loss caused by the direct discharge of condensate in the traditional mode.

[0036] For example, the second return valve 132 controls the opening and closing of the return main pipeline 131 to ensure that the waste heat condensate returns as needed during the heating process, avoids ineffective return during non-heating periods, and further improves the overall utilization rate of steam heat.

[0037] In one embodiment, the condensate return line 130 further includes a return branch line 133, a third return valve 136, a fourth return valve 134, and a fifth return valve 135. The fourth return valve 134 and the fifth return valve 135 are sequentially connected to the main return line 131 along the flow direction of the condensate return line 130. The second return valve 132 is located between the fourth return valve 134 and the fifth return valve 135. The return branch line 133 is connected in parallel with the main return line 131, and the connection point between the outlet end of the return branch line 133 and the main return line 131 is located behind the fifth return valve 135. The third return valve 136 is connected to the return branch line 133. Thus, when the second return valve 132 malfunctions, the fourth return valve 134 and the fifth return valve 135 can be closed, allowing the condensate to continue flowing back into the receiving cavity 10a via the return branch pipe 133. This ensures that the condensate return will not be interrupted when the second return valve 132 is being repaired, preventing water accumulation in the heating tube 20 or waste from external discharge.

[0038] In one embodiment, the system further includes a steam bypass pipe 140 and a temperature detector 150. The steam bypass pipe 140 is connected to the steam pipe 31, and a regulating valve 160 is connected to the steam bypass pipe 140 to control its on / off state. The temperature detector 150 is installed on the inner wall of the tank 10 and electrically connected to the regulating valve 160 to monitor the temperature inside the tank 10. In other words, by installing a temperature detector on the inner wall of the tank 10, the temperature detector 150 monitors the liquid temperature inside the tank 10. If the temperature of the liquid inside the tank 10 is detected to be too high, the inlet pipe 140 can be opened to replenish the liquid inside the tank 10, thereby achieving the purpose of cooling. If the temperature of the liquid inside the tank 10 is detected to be too low, the regulating valve 160 is opened to accelerate the introduction of steam into the heating pipe, thereby heating the liquid inside the tank 10 and increasing the temperature.

[0039] It should be noted that in the field of hot water heating tank technology, it is a common practice for those skilled in the art to detect the temperature of the liquid by installing a temperature detector 150 inside the tank 10. As for how to fix the temperature detector 150 on the inner wall of the tank 10, it is common knowledge and will not be elaborated here.

[0040] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A hot water tank heating device, characterized by, include: A tank body, which is defined to form a receiving cavity for containing liquid, wherein heating tubes are spirally distributed in the receiving cavity; A steam pipeline includes a steam pipe and a steam valve installed on the steam pipe. One end of the steam pipe passes through the tank and extends into the receiving cavity, and is connected to the inlet of the heating pipe. The other end of the steam pipe is used to connect to a steam source. The steam valve is used to control the on / off state of the steam pipeline. The liquid inlet pipeline includes a liquid inlet pipe and a liquid inlet valve installed on the liquid inlet pipe. One end of the liquid inlet pipe is connected to the liquid inlet of the tank body, and the other end is used to connect to a liquid source. The liquid inlet valve is used to control the opening and closing of the liquid inlet pipe. A pressure balancing assembly includes a pressure balancing tube and an overflow tube. One end of the pressure balancing tube extends into the receiving cavity and is submerged in the liquid, while the other end protrudes outside the receiving cavity for communication with the external atmosphere. One end of the overflow tube is connected to the portion of the pressure balancing tube that protrudes outside the receiving cavity.

2. The hot water tank heating device according to claim 1, characterized in that It also includes a hot water supply pipeline, which includes a hot water output pipeline, a power pump, and an output valve. One end of the hot water output pipeline is connected to the liquid outlet of the tank. The power pump and the output valve are connected in sequence to the hot water output pipeline. The power pump is used to provide the power required to transport hot water, and the output valve is used to control the on / off state of the hot water output pipeline.

3. The hot water tank heating device according to claim 2, characterized in that It also includes a hot water return pipeline, which includes a hot water return pipe and a first return valve. One end of the hot water return pipe is connected to the receiving cavity, and the other end is connected to the outlet of the hot water user equipment to return the used hot water to the receiving cavity. The hot water return pipe is connected to a first return valve to control its on / off state.

4. The hot water tank heating device according to claim 3, characterized in that It also includes a pressure transmitter, a drain line, and a discharge valve connected to the drain line. One end of the drain line is connected to the receiving cavity, and the other end protrudes outside the receiving cavity. The drain line is also connected to the overflow pipe. The pressure transmitter is connected to the receiving cavity and is used to monitor the pressure inside the receiving cavity.

5. The hot water tank heating device according to claim 3, wherein It also includes a circulation pipeline, one end of which is connected to the receiving cavity and the other end of which is connected to the hot water output pipeline, and a circulation valve for controlling its on and off is connected to the circulation pipeline.

6. The hot water tank heating device according to claim 1, wherein It also includes a condensate return pipeline, which includes a main return pipeline and a second return valve. One end of the main return pipeline is connected to the outlet of the heating pipe, and the other end is connected to the return port of the tank. The second return valve is connected to the main return pipeline and is used to control the on / off state of the main return pipeline.

7. The hot water tank heating device according to claim 6, characterized in that The condensate return pipeline also includes a return branch pipeline, a third return valve, a fourth return valve, and a fifth return valve. The fourth and fifth return valves are sequentially connected to the main return pipeline along the flow direction of the condensate return pipeline. The second return valve is located between the fourth and fifth return valves. The return branch pipeline is connected in parallel with the main return pipeline, and the connection point between the outlet end of the return branch pipeline and the main return pipeline is located after the fifth return valve. The third return valve is connected to the return branch pipeline.

8. The hot water tank heating device of claim 1, wherein, It also includes a steam bypass pipeline and a temperature detector. The steam bypass pipeline is connected in parallel with the steam pipeline, and a regulating valve for controlling its on / off state is connected to the steam bypass pipeline. The temperature detector is installed on the inner wall of the tank and is electrically connected to the regulating valve for monitoring the temperature inside the tank.

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