A volumetric domestic hot water heating unit

Abstract

The utility model discloses a kind of volumetric domestic hot water heating unit, belong to domestic hot water heating unit technical field, including jar body, the inside of jar body is equipped with heating pipe, the outer surface of heating pipe is connected with high-temperature inlet pipe, the outer surface of heating pipe is connected with high-temperature outlet pipe, the outer surface of heating pipe is connected with cold water inlet pipe, the outer surface of heating pipe is connected with hot water outlet pipe, the inside of heating pipe is installed with U-shaped heat exchange pipe, each pipeline flow can be accurately controlled by electric high-precision regulating valve of conical valve core, so that it can avoid the heat medium excessive waste or cold water excessive leading to heat exchange deficiency, and further can further optimize energy consumption, simultaneously using frequency converter of circulating pump, not only reduce the cost of frequency converter separate installation, reduce floor area, but also can set different operating frequency according to the size of hot water usage, to realize the power-saving function of circulating water pump.

Description

Technical Field

[0001] This utility model relates to the technical field of domestic hot water heating units, specifically a volumetric domestic hot water heating unit. Background Technology

[0002] The centralized domestic hot water supply system commonly used in large northern cities consists of high-temperature water supply pipes, high-temperature return pipes, volumetric heat exchangers, electric regulating valves, domestic hot water supply pipes, domestic hot water return pipes, domestic hot water circulation pumps, tap water supply pipes, primary high-temperature water supply temperature sensors, primary high-temperature water return temperature sensors, hot water supply temperature sensors for water storage tanks, domestic hot water return temperature sensors, cold water heating tank inlet temperature sensors, and control cabinets.

[0003] Existing methods for heating domestic hot water using volumetric heat exchangers have the following drawbacks: First, the electric regulating valve controlling the primary high-temperature water is a general-purpose electric regulating valve. This type of valve has poor flow control capability at small openings, resulting in excessively high domestic hot water temperatures and excessively high primary high-temperature water return temperatures, thus wasting energy. Second, the circulating pumps operate at full load 24 hours a day and cannot adjust their load according to water consumption, leading to further energy waste. Therefore, those skilled in the art have provided a volumetric domestic hot water heating unit to solve the problems mentioned in the background section. Utility Model Content

[0004] The purpose of this utility model is to provide a volumetric domestic hot water heating unit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A volumetric domestic hot water heating unit includes a tank. A heating tube is installed inside the tank. A high-temperature inlet pipe and a high-temperature outlet pipe are connected to the outer surface of the heating tube. A cold water inlet pipe and a hot water outlet pipe are also connected to the outer surface of the heating tube. A U-shaped heat exchange tube is installed inside the heating tube. An electrically operated high-precision regulating valve is connected in series to the outer surface of the high-temperature outlet pipe. A hot water outlet is connected to the upper surface of the tank. A return pipe is connected to the output end of the hot water outlet. The output end of the return pipe is connected to... The cold water inlet pipe is connected to the input end. The outer surface of the return pipe is connected to the residential water drainage pipe and the tap water inlet pipe through external extension pipes. The residential water drainage pipe is located in the homes of residents in the community. The tap water inlet pipe is located near the tank and connects to the municipal tap water pipe. The upper surface of the tank is connected to the safety valve inlet. A circulation pump is installed on the outer surface of the return pipe. The bottom surface of the tank is connected to the sewage pipe. Temperature measuring points are installed inside the hot water outlet, the return pipe, the high temperature outlet pipe, the high temperature inlet pipe, and the cold water inlet pipe.

[0006] As a further improvement of this utility model: the circulating pump has a built-in frequency converter, the circulating pump is installed on the return pipe upstream of the tap water inlet pipe, and the regulating valve core and valve seat of the electric high-precision regulating valve have a conical structure.

[0007] As a further improvement of this utility model: a control cabinet is installed on the outer surface of the tank, and a 4G wireless communication module is installed inside the control cabinet.

[0008] As a further improvement of this utility model: a manhole is provided on the outer surface of the tank, and a sealing door is hinged to the outer surface of the tank via a hinge, and a handle is connected to the outer surface of the sealing door.

[0009] As a further improvement of this utility model: a sealing gasket is connected to the front of the sealing door, and the sealing gasket is made of high-temperature resistant rubber material.

[0010] As a further embodiment of this utility model: a mounting base is connected to the upper surface of the tank, a pressure gauge is mounted on the upper surface of the mounting base, and a pressure sensor is mounted on the inner wall of the tank.

[0011] As a further improvement of this utility model: a set of support legs are connected to the bottom surface of the tank, and each support leg has a positioning hole inside.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This type of volumetric domestic hot water heating unit can precisely control the flow rate of each pipeline through an electric high-precision regulating valve with a conical valve core. This can avoid excessive waste of heat medium or insufficient heat exchange caused by excessive cold water, thereby further optimizing energy consumption. At the same time, by using a circulating pump with a built-in frequency converter, it not only reduces the cost of installing the frequency converter separately and reduces the footprint, but also allows different operating frequencies to be set according to different hot water usage, thereby realizing the power saving function of the circulating water pump. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of a volumetric domestic hot water heating unit; Figure 2 This is a rear view of a storage-type domestic hot water heating unit; Figure 3 This is a side view of a storage-type domestic hot water heating unit; Figure 4 This is a front sectional view of a volumetric domestic hot water heating unit.

[0014] In the diagram: 1. Tank; 2. Heating pipe; 3. High-temperature water inlet pipe; 4. High-temperature water outlet pipe; 5. Cold water inlet pipe; 6. Hot water outlet pipe; 7. U-shaped heat exchange pipe; 8. Hot water outlet; 9. Safety valve connection port; 10. Circulating pump; 11. Return pipe; 12. Sewage pipe; 13. Manhole; 14. Sealing door; 15. Handle; 16. Sealing gasket; 17. Mounting base; 18. Pressure gauge; 19. Pressure sensor; 20. Residential water drainage pipe; 21. Control cabinet; 22. Support leg; 23. Positioning hole; 24. Tap water inlet pipe; 25. Electric high-precision regulating valve; 26. Temperature measuring point. Detailed Implementation

[0015] Please see Figures 1-4In this embodiment of the utility model, a volumetric domestic hot water heating unit includes a tank 1. A heating tube 2 is installed inside the tank 1. A high-temperature inlet pipe 3 and a high-temperature outlet pipe 4 are connected to the outer surface of the heating tube 2. A cold water inlet pipe 5 and a hot water outlet pipe 6 are also connected to the outer surface of the heating tube 2. A U-shaped heat exchange tube 7 is installed inside the heating tube 2. An electric high-precision regulating valve 25 is connected in series to the outer surface of the high-temperature outlet pipe 4. A hot water outlet 8 is connected to the upper surface of the tank 1. The output end of the hot water outlet 8 is connected to a return pipe 11. The output end of the return pipe 11 is connected to the input end of the cold water inlet pipe 5. The outer surface of the return pipe 11 is connected to a residential water drain pipe 20 and a tap water inlet pipe 24 via external extension pipes. The water drain pipe 20 is located in the residents' homes in the community. The tap water inlet pipe 24 is located near the tank body 1 and connects to the municipal tap water pipe. The upper surface of the tank body 1 is connected to the safety valve pipe port 9. The outer surface of the return pipe 11 is equipped with a circulation pump 10. The bottom surface of the tank body 1 is connected to the sewage pipe 12. Temperature measuring points 26 are installed inside the hot water outlet 8, the return pipe 11, the high temperature outlet pipe 4, the high temperature inlet pipe 3, and the cold water inlet pipe 5. The sewage pipe 12 can be used to clean the dirt inside the tank body 1 regularly, which can reduce the scaling of the heat exchange tube and the blockage of the pipe, and extend the service life of core components such as the heating tube 2. At the same time, multiple temperature measuring points 26 can be used to monitor the water temperature inside the hot water outlet 8, the return pipe 11, the high temperature outlet pipe 4, the high temperature inlet pipe 3, and the cold water inlet pipe 5 in real time.

[0016] The circulating pump 10 has a built-in frequency converter and is installed upstream of the tap water inlet pipe 24 on the return pipe 11. The regulating valve core and valve seat of the electric high-precision regulating valve 25 have a conical structure. A control cabinet 21 is installed on the outer surface of the tank 1. A 4G wireless communication module is installed inside the control cabinet 21. A manhole 13 is opened on the outer surface of the tank 1. A sealing door 14 is hinged to the outer surface of the tank 1. A handle 15 is connected to the outer surface of the sealing door 14. A sealing gasket 16 is connected to the front of the sealing door 14. The sealing gasket 16 is made of high-temperature resistant rubber material. The electric high-precision regulating valve 25 controls the flow of water through its conical valve core and valve seat. The core can achieve fine-tuning of flow rate, and with the dynamic control of the control cabinet 21, it can avoid the phenomenon of sudden changes in water temperature when residents use water, and meet the comfort requirements of domestic water use. Through the 4G wireless communication module inside the control cabinet 21, the management personnel can view parameters such as water temperature, pressure, and flow rate through mobile phones or computers. In case of abnormality, alarm information will be automatically pushed, eliminating the need for on-site duty and reducing labor costs. Through the design of manhole 13 and sealing door 14, the inspection and cleaning of internal components of tank 1 can be carried out without disassembling the whole machine, reducing maintenance costs. At the same time, the sealing gasket 16 can provide a good sealing effect when the sealing door 14 and tank 1 are closed.

[0017] A mounting base 17 is connected to the upper surface of the tank body 1, and a pressure gauge 18 is installed on the upper surface of the mounting base 17. A pressure sensor 19 is installed on the inner side wall of the tank body 1. A set of support legs 22 is connected to the bottom surface of the tank body 1. Each support leg 22 has a positioning hole 23 inside. Through the cooperation of the pressure sensor 19 and the pressure gauge 18, the pressure inside the tank body 1 can be monitored in real time and displayed for the staff to view. By using the cooperation of the support legs 22 and the positioning holes 23, the tank body 1 can be installed stably, thereby reducing the noise and displacement risk during equipment operation.

[0018] The working principle of this utility model is as follows: When this device is in use, municipal tap water enters the system through the tap water inlet pipe 24 and directly enters the return pipe 11. At the same time, the low-temperature return water that has not been completely consumed after residents use the water flows back to the return pipe 11 through the residents' water drainage pipe 20. The two mix in the return pipe 11 to form preheated cold water. The residual heat of the return water can be used to reduce the subsequent heating load and achieve energy saving. At this time, the circulation pump 10 adjusts its speed according to the system requirements and stably delivers the preheated cold water to the cold water inlet pipe 5, and finally enters the heating pipe 2 inside the tank 1. Then, the high-temperature heat exchange medium enters the U-shaped heat exchange pipe 7 inside the heating pipe 2 through the high-temperature water inlet pipe 3. Because the U-shaped structure extends the flow path of the high-temperature medium and forms an inside-and-outside wrapping contact with the preheated cold water in the heating pipe 2, the heat exchange area and contact time are greatly increased. The high-temperature medium in pipe 7 and the cold water in heating pipe 2 exchange heat through the pipe wall. After absorbing heat, the cold water heats up to the set domestic hot water temperature. The low-temperature medium after heat exchange is discharged through the high-temperature outlet pipe 4, completing the heat source circulation. At the same time, the temperature measuring points 26 in the hot water outlet 8, return pipe 11, high-temperature inlet pipe 3, high-temperature outlet pipe 4, and cold water inlet pipe 5 collect water temperature data of each key node in real time and transmit it to the control cabinet 21. The control cabinet 21 analyzes the data according to the set water temperature. If the water temperature at the hot water outlet 8 is lower than the set value, the opening of the electric high-precision regulating valve 25 is increased to increase the input of high-temperature medium. At the same time, the speed of the circulating pump 10 can be increased to accelerate the flow of cold water and improve the heat exchange efficiency. If the water temperature is higher than the set value, the opening of the regulating valve is reduced and the pump speed is reduced to avoid energy waste. The above is the complete operation process of this device.

[0019] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalent elements of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A storage-type domestic hot water heating unit, characterized in that, The system includes a tank (1), inside which is a heating pipe (2). The outer surface of the heating pipe (2) is connected to a high-temperature water inlet pipe (3), a high-temperature water outlet pipe (4), a cold water inlet pipe (5), and a hot water outlet pipe (6). A U-shaped heat exchanger (7) is installed inside the heating pipe (2). An electric high-precision regulating valve (25) is connected in series on the outer surface of the high-temperature water outlet pipe (4). A hot water outlet (8) is connected to the upper surface of the tank (1). The output end of the hot water outlet (8) is connected to a return pipe (11). The output end of the return pipe (11) is connected to the cold water inlet pipe (5). The input end is connected, and the outer surface of the return pipe (11) is connected to the residential water drainage pipe (20) and the tap water inlet pipe (24) through external extension pipes. The residential water drainage pipe (20) is located in the home of the residents in the community. The tap water inlet pipe (24) is located near the tank (1) and connected to the municipal tap water pipe. The upper surface of the tank (1) is connected to the safety valve pipe inlet (9). The outer surface of the return pipe (11) is equipped with a circulation pump (10). The bottom surface of the tank (1) is connected to the sewage pipe (12). Temperature measuring points (26) are installed inside the hot water outlet (8), the return pipe (11), the high temperature outlet pipe (4), the high temperature inlet pipe (3), and the cold water inlet pipe (5).

2. The volumetric domestic hot water heating unit according to claim 1, characterized in that, The circulating pump (10) has a built-in frequency converter. The circulating pump (10) is installed on the return pipe (11) upstream of the tap water inlet pipe (24). The regulating valve core and valve seat of the electric high-precision regulating valve (25) are conical structures.

3. A storage-type domestic hot water heating unit according to claim 1, characterized in that, A control cabinet (21) is installed on the outer surface of the tank (1), and a 4G wireless communication module is installed inside the control cabinet (21).

4. A volumetric domestic hot water heating unit according to claim 1, characterized in that, The outer surface of the tank (1) has a manhole (13), and the outer surface of the tank (1) is hinged with a sealing door (14), and the outer surface of the sealing door (14) is connected with a handle (15).

5. A volumetric domestic hot water heating unit according to claim 4, characterized in that, The front of the sealing door (14) is connected to a sealing gasket (16), which is made of high-temperature resistant rubber.

6. A storage-type domestic hot water heating unit according to claim 1, characterized in that, The upper surface of the tank (1) is connected to a mounting base (17), a pressure gauge (18) is mounted on the upper surface of the mounting base (17), and a pressure sensor (19) is mounted on the inner wall of the tank (1).

7. A storage-type domestic hot water heating unit according to claim 1, characterized in that, The bottom surface of the tank (1) is connected to a set of support legs (22), and each support leg (22) has a positioning hole (23) inside.

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