Directly-heated efficient tank heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a directly-heated efficient tank heat exchanger which comprises a tank body, a heating coil and a heating cavity are arranged in the tank body, the top of the heating cavity is in an inverted funnel shape, and a water outlet communicated with the highest position of the top of the heating cavity is formed in the top of the tank body. A water inlet communicated with the heating cavity is formed in the position, close to the bottom, of the tank body; the heating coil is spirally and vertically arranged in the heating cavity, a convection core cylinder is vertically arranged in the middle of the heating coil, and gaps are reserved between the upper end and the lower end of the convection core cylinder and the upper cavity wall and the lower cavity wall of the heating cavity. A convection core cylinder is arranged, a funnel-shaped confluence area is arranged at a water outlet, and confluence high-temperature water and low-temperature backflow water are distributed in the area according to different water temperatures and different specific gravities; a certain amount of water is in the tank body and has a certain amount of thermal inertia, and when disturbance occurs, the thermal inertia of the water effectively relieves temperature fluctuation, so that a heat exchange system is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a direct-heating high-efficiency tank heat exchanger. Background Art

[0002] Heat exchanger is a device that transfers part of the heat of hot fluid to cold fluid, also known as heat exchanger. Heat exchanger plays an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchanger can be used as heater, cooler, condenser, evaporator and reboiler, etc., and is widely used.

[0003] The existing high-efficiency tank heat exchanger provides a place for high-pressure Freon and the water to be heated to exchange heat. Freon and water perform a single heat exchange in the tank, and the water outlet temperature fluctuates with the water flow and the inlet temperature, which cannot meet the constant temperature requirement of the outlet water temperature of the direct-heated heat pump water heater.

[0004] In the shell-and-tube heat exchanger, two layers of pipes are nested inside and outside, and the Freon and the water in the shell perform a single heat exchange. In order to achieve the water temperature at the outlet, the water flow in the heat exchanger is throttled and modulated using the water temperature. Since the water flow rate and flow in the heat exchanger are reduced and the thermal inertia is small, when the water temperature or Freon pressure disturbance occurs, temperature overshoot occurs, and even exceeds the critical temperature of the refrigerant, resulting in high-pressure protection or pipeline rupture.

[0005] Based on the above reasons, the utility model proposes a direct-heated high-efficiency tank heat exchanger to solve the problem in the prior art that the water temperature at the outlet of the high-efficiency tank heat exchanger fluctuates with the water flow size and the inlet water temperature, and cannot meet the constant temperature requirement of the outlet water temperature of the direct-heated heat pump water heater. Utility Model Content

[0006] The utility model aims to provide a direct-heated high-efficiency tank heat exchanger to solve the problem in the prior art that the water temperature at the outlet of the high-efficiency tank heat exchanger fluctuates with the water flow and the water inlet temperature, and cannot meet the constant temperature requirement of the outlet water temperature of the direct-heated heat pump water heater.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A direct-heated high-efficiency tank heat exchanger comprises a tank body, a heating coil is arranged in the tank body, a heating chamber is arranged in the tank body, the top of the heating chamber is in the shape of an inverted funnel, a water outlet connected to the highest point of the top of the heating chamber is arranged at the top of the tank body, and a water inlet connected to the heating chamber is arranged near the bottom of the tank body; the heating coil is vertically arranged in the heating chamber in a spiral shape, a convection core is vertically arranged in the middle of the heating coil, and gaps are left between the upper and lower ends of the convection core and the upper and lower walls of the heating chamber.

[0009] A further technical solution is that the water inlet is connected to a water inlet pipe, the water outlet is connected to a water outlet pipe, and a flow regulating valve is arranged on the water inlet pipe.

[0010] A further technical solution is that it also includes a temperature regulating controller, a temperature probe is installed in the heating chamber near the water outlet, and the temperature probe and the flow regulating valve are electrically connected to the temperature regulating controller.

[0011] A further technical solution is that the upper end of the heating coil is connected to a heat medium inlet pipe, which extends to the outside of the tank body, and the lower end of the heating coil is connected to a heat medium outlet pipe, which extends to the outside of the tank body.

[0012] A further technical solution is that a mounting hole connected to the heating chamber is provided near the bottom of the tank body, a first connecting ring is formed on the outer wall of the tank body around the mounting hole protrusion, an external thread is provided on the outer wall around the first connecting ring, and the lower end of the heating coil is connected to the mounting hole; a second connecting ring is provided at the end of the heat medium outlet pipe, an internal thread matching the external thread is provided on the inner wall of the second connecting ring, and the first connecting ring and the second connecting ring are connected by matching external and internal threads.

[0013] A further technical solution is that the outer wall of the convection core is connected to the cavity wall of the heating cavity through a support bar.

[0014] A further technical solution is that the support bars are provided in a plurality.

[0015] Compared with the prior art, the utility model has at least one of the following beneficial effects: 1. By setting a convection core tube and setting a funnel-shaped confluence area at the water outlet, different water temperatures and different specific gravities are used in this area to divert and converge high-temperature water and low-temperature return water; there is a certain amount of water in the tank body, which has a certain amount of thermal inertia. When disturbance occurs, the thermal inertia of the water body effectively alleviates the temperature fluctuation and stabilizes the heat exchange system; 2. The convection core tube is set at the center to have flow isolation and heat insulation functions, and downcomers and upcomers are formed on the inner and outer sides of the convection core respectively, and a convection loop is formed by this channel to heat the return water multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a direct-heating high-efficiency tank heat exchanger of the utility model.

[0017] Figure 2 It is a cross-sectional schematic diagram of a first connecting ring and a second connecting ring of a direct-heating high-efficiency tank heat exchanger of the utility model.

[0018] Icons: 1-tank body, 2-heating coil, 3-heating chamber, 4-water outlet, 5-water inlet, 6-convection core, 7-water inlet pipe, 8-water outlet pipe, 9-flow regulating valve, 10-temperature regulating controller, 11-temperature probe, 12-heat medium inlet pipe, 13-heat medium outlet pipe, 14-first connecting ring, 15-second connecting ring, 16-support bar. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] Figure 1 to Figure 2 Shown is an embodiment of the utility model.

[0021] Embodiment 1:

[0022] like Figure 1 A direct-heating high-efficiency tank heat exchanger includes a tank body 1, a heating coil 2 is arranged in the tank body 1, a heating chamber 3 is arranged in the tank body 1, the top of the heating chamber 3 is in an inverted funnel shape, a water outlet 4 connected to the highest point of the top of the heating chamber 3 is arranged at the top of the tank body 1, and a water inlet 5 connected to the heating chamber 3 is arranged near the bottom of the tank body 1; the heating coil 2 is vertically arranged in the heating chamber 3 in a spiral shape, and a convection core 6 is vertically arranged in the middle of the heating coil 2, and the upper and lower ends of the convection core 6 are both separated from the upper and lower walls of the heating chamber 3. By setting the convection core 6 and setting a funnel-shaped confluence area at the water outlet 4, different water temperatures and different specific gravities are used in this area to divert and converge high-temperature water and low-temperature reflux water; there is a certain amount of water in the tank body 1, which has a certain amount of thermal inertia. When disturbance occurs, the thermal inertia of the water effectively alleviates the temperature fluctuation and stabilizes the heat exchange system. A convection core tube 6 is arranged at the center to have flow isolation and heat insulation functions, and downcomers and upcomers are formed inside and outside the convection core respectively, and a convection loop is formed by this channel to heat the return water body multiple times.

[0023] The water inlet 5 is connected to a water inlet pipe 7, the water outlet 4 is connected to a water outlet pipe 8, and a flow regulating valve 9 is provided on the water inlet pipe 7. By providing the water inlet pipe 7, it is convenient to connect a water source, and pour low-temperature water to be heated into the heating chamber 3 for heating. By providing the water outlet 4, it is convenient to connect equipment that needs to use hot water.

[0024] It also includes a temperature regulating controller 10. A temperature probe 11 is installed at the heating chamber 3 near the water outlet 4. The temperature probe 11 and the flow regulating valve 9 are electrically connected to the temperature regulating controller 10. By setting the temperature probe 11 at the water outlet 4, the water temperature at the water outlet 4 can be monitored. By setting the controller, the amount of water entering the heat exchanger can be adjusted by modulating the flow regulating valve 9, so that the outlet water temperature in the heating chamber 3 can be controlled, and the purpose of direct heating of the water outlet 4 at the set temperature can be achieved.

[0025] The upper end of the heating coil 2 is connected to a heat medium inlet pipe 12, which extends to the outside of the tank body 1, and the lower end of the heating coil 2 is connected to a heat medium outlet pipe 13, which extends to the outside of the tank body 1. Through the heat medium inlet pipe 12 and the heat medium outlet pipe 13, it is convenient to access an external heating device to pass the heat medium into the heating coil 2, and heat exchange is carried out between the outer wall of the heating coil 2 and the water in the heating chamber 3 to heat up the water in the heating chamber 3. The heat medium can be Freon. The movement of the heat medium from top to bottom in the heating coil 2 can make the upper temperature of the heating coil 2 always higher than the lower temperature, so that the water in the heating chamber 3 is continuously heated up during the rising process.

[0026] Embodiment 2:

[0027] Based on the above embodiments, Figure 2 As shown, a mounting hole connected to the heating chamber 3 is provided near the bottom of the tank body 1, and a first connecting ring 14 is formed on the outer wall of the tank body 1 around the mounting hole, and an outer wall around the first connecting ring 14 is provided with an external thread, and the lower end of the heating coil 2 is connected to the mounting hole; a second connecting ring 15 is provided at the end of the heat medium outlet pipe 13, and an internal thread matching the external thread is provided on the inner wall of the second connecting ring 15, and the first connecting ring 14 and the second connecting ring 15 are connected by matching the external thread and the internal thread. With the help of the first connecting ring 14 and the second connecting ring 15, the heating coil 2 can be quickly connected to the heat medium outlet pipe 13, and it is easy to disassemble for maintenance and replacement. The heat medium inlet pipe 12 and the heating coil 2 can be connected in the same way. A sealing gasket can also be provided at the connection position between the second connecting ring 15 and the heat medium outlet pipe 13 to improve the sealing performance.

[0028] The outer wall of the convection core 6 is connected to the cavity wall of the heating cavity 3 through the support strip 16 .

[0029] The support bars 16 are provided in a plurality. By providing a plurality of support bars 16 , a good support force can be provided to the convection core 6 , so that the convection core 6 can be stably installed in the heating chamber 3 .

[0030] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A direct-heating high-efficiency tank heat exchanger, comprising a tank body (1), wherein a heating coil (2) is arranged in the tank body (1), characterized in that: A heating chamber (3) is arranged in the tank body (1), the top of the heating chamber (3) is in the shape of an inverted funnel, a water outlet (4) connected to the highest point of the top of the heating chamber (3) is arranged at the top of the tank body (1), and a water inlet (5) connected to the heating chamber (3) is arranged near the bottom of the tank body (1); the heating coil (2) is vertically arranged in the heating chamber (3) in a spiral shape, a convection core tube (6) is vertically arranged in the middle of the heating coil (2), and gaps are left between the upper and lower ends of the convection core tube (6) and the upper and lower walls of the heating chamber (3).

2. A direct-heated high-efficiency tank heat exchanger according to claim 1, characterized in that: The water inlet (5) is connected to a water inlet pipe (7), the water outlet (4) is connected to a water outlet pipe (8), and a flow regulating valve (9) is provided on the water inlet pipe (7).

3. A direct-heated high-efficiency tank heat exchanger according to claim 2, characterized in that: It also comprises a temperature regulating controller (10), wherein the heating chamber (3) is provided with a temperature probe (11) at a position close to the water outlet (4), and the temperature probe (11) and the flow regulating valve (9) are both electrically connected to the temperature regulating controller (10).

4. The direct-heated high-efficiency tank heat exchanger according to claim 1 is characterized in that: The upper end of the heating coil (2) is connected to a heat medium inlet pipe (12), and the heat medium inlet pipe (12) extends to the outside of the tank body (1); the lower end of the heating coil (2) is connected to a heat medium outlet pipe (13), and the heat medium outlet pipe (13) extends to the outside of the tank body (1).

5. A direct-heated high-efficiency tank heat exchanger according to claim 4, characterized in that: A mounting hole connected to the heating chamber (3) is provided near the bottom of the tank body (1); a first connecting ring (14) is formed on the outer wall of the tank body (1) around the mounting hole, and an external thread is provided on the outer wall around the first connecting ring (14); the lower end of the heating coil (2) is connected to the mounting hole; a second connecting ring (15) is provided at the end of the heat medium outlet pipe (13); an internal thread matching the external thread is provided on the inner wall of the second connecting ring (15); the first connecting ring (14) and the second connecting ring (15) are connected to each other through the matching external thread and internal thread.

6. The direct-heated high-efficiency tank heat exchanger according to claim 1 is characterized in that: The outer wall of the convection core tube (6) is connected to the cavity wall of the heating cavity (3) via a support bar (16).

7. A direct-heated high-efficiency tank heat exchanger according to claim 6, characterized in that: The support bars (16) are provided in a plurality.

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