Heat exchanger for steam heat recovery

Abstract

The utility model relates to the technical field of drinking water machine, especially steam heat energy recovery's heat exchanger. Steam heat energy recovery's heat exchanger of the utility model, it includes heat exchange subassembly, and heat exchange subassembly includes heat exchange inner tube and heat exchange outer tube, the both ends of heat exchange inner tube are inner tube input end, inner tube output end respectively, heat exchange outer tube includes outer tube input end, upper output end and the lower output end located below upper output end, heat exchange inner tube sets up in heat exchange outer tube and forms heat exchange cavity, the both ends of heat exchange outer tube are sealed, and inner tube input end, inner tube output end respectively from the both ends of heat exchange outer tube are exposed. The utility model can realize heat energy recovery, can also eliminate or reduce the possibility of scalding the person near drinking water machine, improve safety.

Description

Technical Field

[0001] This utility model relates to the field of water dispenser technology, and in particular to a heat exchanger for steam heat energy recovery. Background Technology

[0002] Traditional water dispensers use heat exchangers that consist of an inner heat exchange tube and an outer heat exchange tube. The inner heat exchange tube is located inside the outer heat exchange tube, and both the inner and outer heat exchange tubes have inlet and outlet ends, respectively. Cold water flows through the inner heat exchange tube, and hot water flows through the outer heat exchange tube, enabling heat exchange between hot and cold water, and between hot and cold water.

[0003] However, traditional water dispensers produce pressurized and high-temperature steam when boiling water. But the heat exchangers used in traditional water dispensers cannot be used for steam, resulting in wasted heat energy from the steam; in addition, the steam may spray out and scald people near the water dispenser. Utility Model Content

[0004] One objective of this invention is to solve or alleviate the aforementioned technical problems.

[0005] The present invention employs a heat exchanger for steam heat energy recovery, comprising a heat exchange assembly, which includes an inner heat exchange tube and an outer heat exchange tube. The inner heat exchange tube has an inner tube inlet and an inner tube outlet, respectively. The outer heat exchange tube includes an outer tube inlet, an upper outlet, and a lower outlet located below the upper outlet. The inner heat exchange tube is disposed inside the outer heat exchange tube to form a heat exchange chamber. Both ends of the outer heat exchange tube are sealed, while the inner tube inlet and the inner tube outlet are exposed from both ends of the outer heat exchange tube.

[0006] The advantages of this invention are that it can realize heat recovery, eliminate or reduce the possibility of scalding people near the water dispenser, and improve safety.

[0007] A further technical solution involves placing the input end of the outer tube between the upper output end and the lower output end, and placing it closer to the lower output end than the upper output end.

[0008] This technical solution can further eliminate or reduce the possibility of people near the water dispenser being scalded, and improve safety.

[0009] In a further technical solution, both the inner and outer heat exchange tubes are cylindrical in shape and coaxial.

[0010] A further technical solution is that the heat exchange outer tube is cylindrical in shape, with the upper and lower output ends located at the same circumferential position on the heat exchange outer tube, and the input end of the outer tube located at the circumferential position opposite to the upper output end.

[0011] This technical solution ensures the smooth discharge of cold air and condensate.

[0012] A further technical solution is that the heat exchange inner tube is thermally conductive and has an annular inner tube protrusion, making the heat exchange inner tube a corrugated pipe.

[0013] This technical solution can improve the heat exchange effect and the heat recovery effect.

[0014] A further technical solution also includes a steam input pipe connected to the input end of the external pipe; the other end of the steam input pipe is provided with a steam input pipe connector.

[0015] A further technical solution also includes a condensate drain pipe and a condensate drain pipe connector. The condensate drain pipe connector is provided with a condensate connection end, a condensate discharge end, and an atmospheric connection end. The condensate connection end is connected to the lower output end, the condensate discharge end is set downward and connected to the condensate drain pipe, and the atmospheric connection end is set upward and connected to the atmosphere.

[0016] This technical solution ensures that condensate is discharged from the condensate drain pipe and will not remain inside the condensate drain pipe connector due to atmospheric pressure.

[0017] A further technical solution is that the atmospheric communication end is cylindrical in shape and has a sidewall through hole.

[0018] This technical solution can further ensure that condensate is discharged from the condensate drain pipe and will not remain in the condensate drain pipe connector due to atmospheric pressure.

[0019] A further technical solution involves providing sealing plugs at both ends of the heat exchange outer tube, with the inner tube inlet and outlet protruding from the sealing plugs at both ends of the heat exchange outer tube. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a heat exchanger for steam heat energy recovery according to an embodiment of this utility model.

[0021] Figure 2 This is a bottom view schematic diagram of a heat exchanger for steam heat energy recovery according to an embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram of section SEC1.

[0023] Figure 4 This is a schematic diagram of DTL1 in detail one.

[0024] The accompanying drawings in the specification that best illustrate the technical features of this utility model are: Figure 3 .

[0025] Arrow 1 ARR1; Arrow 2 ARR2; Arrow 3 ARR3; Arrow 4 ARR4; Arrow 5 ARR5; Section 1 SEC1; Detail 1 DTL1; Heat exchange assembly 1; Inner heat exchange tube 11; Inner tube inlet 111; Inner tube outlet 112; Inner tube protrusion 113; Outer heat exchange tube 12; Outer tube inlet 121; Upper outlet 122; Lower outlet 123; Heat exchange chamber 13; Sealing plug 14; Steam inlet pipe 2; Steam inlet pipe connector 21; Condensate drain pipe 3; Condensate drain pipe connector 31; Condensate connection end 311; Condensate drain end 312; Atmospheric connection end 313; Side wall through hole 314. Detailed Implementation

[0026] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0027] As a specific embodiment, the heat exchanger for steam heat energy recovery of this utility model includes a heat exchange component 1.

[0028] The heat exchange assembly 1 includes an inner heat exchange tube 11 and an outer heat exchange tube 12.

[0029] The two ends of the heat exchange inner tube 11 are the inner tube input end 111 and the inner tube output end 112, respectively.

[0030] The heat exchange outer tube 12 includes an outer tube inlet 121, an upper outlet 122, and a lower outlet 123 located below the upper outlet 122.

[0031] The heat exchange inner tube 11 is disposed inside the heat exchange outer tube 12 to form a heat exchange cavity 13.

[0032] Both ends of the heat exchange outer tube 12 are sealed, while the inner tube inlet 111 and inner tube outlet 112 are exposed at both ends of the heat exchange outer tube 12. For example, both ends of the heat exchange outer tube 12 are provided with sealing plugs 14, and the inner tube inlet 111 and inner tube outlet 112 pass through the sealing plugs 14 at both ends of the heat exchange outer tube 12, thus sealing both ends of the heat exchange outer tube 12 while exposing the inner tube inlet 111 and inner tube outlet 112 at both ends. The sealing plugs 14 can be made of rubber or metal, etc.

[0033] The working principle is as follows: before use, connect the outer pipe inlet 121 to the steam source of the water dispenser (not shown in the attached diagram), connect the inner pipe inlet 111 to the cold water source (usually room temperature water, such as tap water), connect the upper outlet 122 to the atmosphere, and connect the lower outlet 123 to the water receiving pool.

[0034] like Figure 3As shown, arrow 1 ARR1 indicates the direction of cold water input; arrow 2 ARR2 indicates the direction of steam flow; arrow 3 ARR3 indicates the direction of heated water output; arrow 4 ARR4 indicates the direction of condensate flow; and arrow 5 ARR5 indicates the direction of cold air output.

[0035] In use, the water in the heating container (not shown in the attached diagram) of the water dispenser is heated to boiling, forming pressurized and high-temperature steam. The steam enters the heat exchange outer tube 12 from the outer tube inlet 121 and comes into contact with the heat exchange inner tube 11 in the heat exchange chamber 13. Simultaneously, cold water flows into the heat exchange inner tube 11 from the inner tube inlet 111 and flows out from the inner tube outlet 112, exchanging heat with the pressurized and high-temperature steam. Therefore, the water flowing out from the inner tube outlet 112 is the heated water, which is then transported to the water dispenser's heating container for further heating, thus achieving heat recovery. The pressurized and high-temperature steam cools upon contact with the heat exchange inner tube 11, forming cold air and condensate. The cold air is discharged from the upper outlet 122, and the condensate is discharged directly or collected and then discharged from the lower outlet 123, eliminating or reducing the possibility of scalding people near the water dispenser and improving safety.

[0036] As one specific implementation, the outer pipe inlet 121 is located between the upper outlet 122 and the lower outlet 123, and is closer to the lower outlet 123 than the upper outlet 122. In this implementation, the pressurized and high-temperature steam input from the outer pipe inlet 121 needs to flow a longer path within the heat exchange chamber 13 before reaching the upper outlet 122, further reducing the temperature of the cold air flowing out from the upper outlet 122. This can further eliminate or reduce the possibility of scalding people near the water dispenser and improve safety.

[0037] As one of the specific implementation methods, both the heat exchange inner tube 11 and the heat exchange outer tube 12 are cylindrical in shape and coaxial.

[0038] As one specific implementation, the heat exchange outer tube 12 is cylindrical in shape. The upper output end 122 and the lower output end 123 are located at the same circumferential position on the heat exchange outer tube 12, and the outer tube input end 121 is located at a circumferential position opposite to the upper output end 122. It is easy to understand that after the outer tube input end 121 rotates 180 degrees around the axis of the heat exchange outer tube 12, it is located at the same circumferential position as the lower output end 123 on the heat exchange outer tube 12. This implementation ensures the smooth discharge of cold air and condensate.

[0039] As one specific implementation, the heat exchange inner tube 11 is thermally conductive and has annular inner tube protrusions 113. For example, the heat exchange inner tube 11 is made of a metal such as stainless steel and is thermally conductive. The inner tube protrusions 113 are multiple and equidistant, making the heat exchange inner tube 11 a corrugated pipe (a pipe with a wavy cross-section, where wavy refers to a shape with crests and troughs, but the shape of the crests and troughs can be triangular, square, positive, or other waveforms). This implementation can increase the heat exchange area of ​​the heat exchange inner tube 11, thereby improving the heat exchange effect. At the same time, it can create resistance to the flow of cold water in the heat exchange inner tube 11 (compared to cold water flowing through a cylindrical pipe under the same pressure), slowing down the flow rate of cold water in the heat exchange inner tube 11, allowing the cold water to further absorb heat energy more fully, thereby improving the heat recovery effect.

[0040] As one of the specific implementation methods, the heat exchanger for steam heat energy recovery in this embodiment of the utility model further includes a steam input pipe 2 connected to the outer pipe input end 121; the other end of the steam input pipe 2 (the other end of the end connected to the outer pipe input end 121) is provided with a steam input pipe connector 21.

[0041] As one specific implementation, the heat exchanger for steam heat energy recovery in this embodiment of the present invention further includes a condensate drain pipe 3 and a condensate drain pipe connector 31. The condensate drain pipe connector 31 is provided with a condensate connection end 311, a condensate drain end 312, and an atmospheric connection end 313. The condensate connection end 311 is connected to the lower output end 123, the condensate drain end 312 is downwardly positioned and connected to the condensate drain pipe 3, and the atmospheric connection end 313 is upwardly positioned and connected to the atmosphere. It is easy to understand that the condensate drain pipe connector 31 is generally T-shaped, and the condensate drain end 312 and the atmospheric connection end 313 are positioned opposite each other. This implementation ensures that condensate is discharged from the condensate drain pipe 3 and does not remain in the condensate drain pipe connector 31 due to atmospheric pressure.

[0042] As one specific implementation, the atmospheric connection end 313 is cylindrical in shape and has a sidewall through hole 314. This implementation can further ensure that condensate is discharged from the condensate drain pipe 3 and will not remain in the condensate drain pipe connector 31 due to atmospheric pressure.

[0043] The terms used in this invention, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are merely for distinction.

[0044] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0045] In this utility model, terms indicating direction or location such as top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, and below are used to indicate relative positions rather than absolute positions.

[0046] Terms used in this invention, such as "approximately," "generally," "approximately," and "similar," are limiting terms used to indicate features that are present but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context; for example, regarding dimensional deviations, the specific context may include, but is not limited to, relevant standards for dimensional tolerances.

Claims

1. A heat exchanger for steam heat energy recovery, comprising a heat exchange assembly (1), the heat exchange assembly (1) comprising an inner heat exchange tube (11) and an outer heat exchange tube (12); the two ends of the inner heat exchange tube (11) are an inner tube inlet (111) and an inner tube outlet (112), respectively. Its characteristics are, The heat exchange outer tube (12) includes an outer tube inlet (121), an upper outlet (122), and a lower outlet (123) located below the upper outlet (122); the heat exchange inner tube (11) is disposed inside the heat exchange outer tube (12) to form a heat exchange cavity (13); both ends of the heat exchange outer tube (12) are sealed, and the inner tube inlet (111) and the inner tube outlet (112) are exposed from both ends of the heat exchange outer tube (12).

2. The heat exchanger for steam heat energy recovery according to claim 1, characterized in that, The input terminal (121) of the outer tube is located between the upper output terminal (122) and the lower output terminal (123) and is closer to the lower output terminal (123) than the upper output terminal (122).

3. The heat exchanger for steam heat energy recovery according to claim 1, characterized in that, Both the inner heat exchange tube (11) and the outer heat exchange tube (12) are cylindrical in shape and have the same axis.

4. The heat exchanger for steam heat energy recovery according to claim 3, characterized in that, The heat exchange outer tube (12) is cylindrical in shape. The upper output end (122) and the lower output end (123) are located at the same circumferential position on the heat exchange outer tube (12), and the outer tube input end (121) is located at the circumferential position opposite to the upper output end (122).

5. The heat exchanger for steam heat energy recovery according to claim 4, characterized in that, The heat exchange inner tube (11) is thermally conductive and has an annular inner tube protrusion (113), making the heat exchange inner tube (11) a corrugated tube.

6. The heat exchanger for steam heat energy recovery according to claim 1, characterized in that, It also includes a steam input pipe (2) connected to the external pipe input end (121); the other end of the steam input pipe (2) is provided with a steam input pipe connector (21).

7. The heat exchanger for steam heat energy recovery according to claim 1, characterized in that, It also includes a condensate drain pipe (3) and a condensate drain pipe connector (31). The condensate drain pipe connector (31) is provided with a condensate connection end (311), a condensate drain end (312) and an atmospheric connection end (313). The condensate connection end (311) is connected to the lower output end (123). The condensate drain end (312) is set downward and connected to the condensate drain pipe (3). The atmospheric connection end (313) is set upward and connected to the atmosphere.

8. The heat exchanger for steam heat energy recovery according to claim 7, characterized in that, The atmospheric connection end (313) is cylindrical in shape and has a side wall through hole (314) on its side wall.

9. The heat exchanger for steam heat energy recovery according to claim 1, characterized in that, Both ends of the heat exchange outer tube (12) are provided with sealing plugs (14), and the inner tube inlet end (111) and the inner tube outlet end (112) pass through the sealing plugs (14) at both ends of the heat exchange outer tube (12).

Images