CN214426496U

CN214426496U - Novel double-pipe heat exchanger and heat exchange pipe thereof

Info

Publication number: CN214426496U
Application number: CN202022784052.6U
Authority: CN
Inventors: 刘斌; 朱胜民; 金子洋
Original assignee: Zhejiang Intech Technology Co Ltd
Current assignee: Zhejiang Intech Technology Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-10-19
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a heat exchanger equipment field especially relates to a novel double pipe heat exchanger and heat exchange tube thereof. A heat exchange tube comprises a tube body, wherein the tube body comprises an outer tube, a middle tube and an inner tube, the middle tube is arranged in the outer tube in a penetrating mode, and the inner tube is arranged in the middle tube in a penetrating mode; a first channel is arranged between the outer pipe and the middle pipe, a second channel is arranged inside the inner pipe, and a third channel is arranged between the middle pipe and the inner pipe; the first channel and the second channel are connected in series or in parallel. In the technical scheme, the heat exchange tube adopts a three-channel structure, the refrigerant passes through the middle channel, the secondary refrigerant passes through the external channel and the internal channel respectively, or the secondary refrigerant passes through the middle channel, the refrigerant passes through the external channel and the internal channel respectively, the heat exchange contact surface of cold and hot fluids is increased, and the heat exchange efficiency is improved; when the first channel is connected with the second channel in series, the channel is in a circuitous form, so that the heat exchange time is prolonged, and the tube pass is increased; when the first channel is connected with the second channel in parallel, the two ends of the first channel exchange heat simultaneously, and the performance is stronger.

Description

Novel double-pipe heat exchanger and heat exchange pipe thereof

Technical Field

The utility model relates to a heat exchanger equipment field especially relates to a novel double pipe heat exchanger and heat exchange tube thereof.

Background

The heat exchange tube is one of the elements of the heat exchanger, is used for exchanging heat between two media, is a device capable of rapidly transferring heat energy from one point to the other point, and has high heat conductivity and good isothermal property. The inner pipe of the heat exchange pipe is generally of a multi-head spiral pipe structure, is designed in a pure countercurrent mode, has good heat exchange performance, large water flow channel, dirt resistance, blocking resistance and good freezing resistance, and is suitable for household and commercial heating, domestic hot water, water ground source heat pumps and the like.

Chinese patent publication No. CN205279802U relates to a double-pipe heat exchanger, which includes an outer pipe, a first heat exchange pipe sleeved in the outer pipe, and a second heat exchange pipe sleeved in the first heat exchange pipe, wherein a first refrigerant is disposed between the outer pipe and the first heat exchange pipe, a fluid medium requiring heat exchange is disposed between the first heat exchange pipe and the second heat exchange pipe, and a second refrigerant is disposed in the second heat exchange pipe; the first refrigerant and the second refrigerant have temperature difference and exchange heat with the fluid medium simultaneously or asynchronously through external control. The heat exchanger utilizes the heat pump principle, and simultaneously or irregularly exchanges heat with fluid media to be heat exchanged through two refrigerant agents with different temperatures in the heat exchange process, and the fluid media to be heat exchanged is rapidly heated to high temperature from low temperature or rapidly reduced to low temperature from high temperature, so that the problems that the heat exchange speed of the double-pipe heat exchanger is low and the fluid media cannot be heated to higher temperature or reduced to lower temperature are solved.

Chinese patent publication No. CN206094995U relates to a coil pipe of a coaxial double pipe heat exchanger, which is formed by two pipe bodies crossing each other and spiraling along a spiral track; the pipe body comprises an outer pipe and an inner pipe sleeved in the outer pipe; a secondary refrigerant channel is arranged in the inner pipe, and a refrigerant channel is formed between the outer pipe and the inner pipe; the tube body is provided with a secondary refrigerant inlet and a secondary refrigerant outlet which are communicated with the secondary refrigerant channel, and a refrigerant inlet and a refrigerant outlet which are communicated with the refrigerant channel; the inner pipe is formed by circumferentially and annularly connecting a plurality of pipe wings, and a pipe wing groove is formed between every two adjacent pipe wings; the inner pipe is internally provided with a main pipe cavity and a plurality of pipe wing cavities communicated with the main pipe cavity; the pipe wing cavity is enclosed by a single pipe wing to form, and the main pipe cavity is enclosed by all the pipe wings in the circumferential direction to form. The coil pipe increases the heat exchange area and improves the heat exchange efficiency.

However, the heat exchange efficiency of the heat exchange tube described above is increasingly unable to meet the market demand, and one channel of the heat exchange tube related to chinese patent publication No. CN205279802U corresponds to one inlet and outlet, and when there are a plurality of inlets and outlets, the inlet and outlet need to be improved when the heat exchanger is installed, which is rather cumbersome.

Disclosure of Invention

In order to solve the above problem, an object of the present invention is to provide a heat exchange tube, which can effectively improve the heat exchange efficiency of the heat exchanger and improve the heat exchange performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the device comprises a pipe body, wherein the pipe body comprises an outer pipe, a middle pipe arranged in the outer pipe in a penetrating mode and an inner pipe arranged in the middle pipe in a penetrating mode; a first channel is arranged between the outer pipe and the middle pipe, a second channel is arranged inside the inner pipe, and a third channel is arranged between the middle pipe and the inner pipe; the first channel and the second channel are connected in series or in parallel. In the technical scheme, the heat exchange tube adopts a three-channel structure, the refrigerant passes through the middle channel, the secondary refrigerant passes through the external channel and the internal channel respectively, or the secondary refrigerant passes through the middle channel, the refrigerant passes through the external channel and the internal channel respectively, the heat exchange contact surface of cold and hot fluids is increased, and the heat exchange efficiency is improved; when the first channel is connected with the second channel in series, the channel is in a circuitous form, so that the heat exchange time is prolonged, and the tube pass is increased; when the first channel is connected with the second channel in parallel, the two ends of the first channel exchange heat simultaneously, and the performance is stronger.

Preferably, the intermediate pipe is a multi-head spiral pipe, the inner pipe is a multi-head spiral pipe or a non-spiral pipe, and fins are arranged on the inner wall and/or the outer wall of the intermediate pipe and the inner pipe. In the technical scheme, the middle pipe or the inner pipe adopts a multi-head spiral pipe, the structure is more compact, the heat transfer area is larger than that of a straight pipe, and the heat transfer coefficient in the spiral pipe is larger than that of the straight pipe, so that the fluid can transfer heat more stably and continuously; the fins are added to increase the external surface area (or the internal surface area) of the middle tube or the inner tube and improve the heat exchange efficiency.

Preferably, when the first channel and the second channel are secondary refrigerant channels and the third channel is a refrigerant channel, fins are arranged on the inner wall of the middle tube and the outer wall of the inner tube. In the technical scheme, the fins are arranged on the inner wall of the middle pipe and the outer wall of the inner pipe, namely on the inner wall of the channel where the refrigerant is located, the heat exchange area is increased, and in order to prevent scale from being generated on one side of the secondary refrigerant channel, the secondary refrigerant channel is inconvenient to clean.

Preferably, when the first channel and the second channel are refrigerant channels and the third channel is a secondary refrigerant channel, fins are arranged on the outer wall of the middle tube and the inner wall of the inner tube.

Preferably, the multi-head spiral pipe is formed by enclosing a plurality of pipe edges and pipe grooves formed between the adjacent pipe edges. In the technical scheme, the enclosing mode of the multi-head spiral pipe is also the same as that of increasing the side wall area of the middle pipe or the inner pipe.

Preferably, the pipe body is of a straight pipe structure, a U-shaped structure, a snake-shaped disc structure or a multi-turn runway structure. In the technical scheme, the structure of the heat exchange tube can be suitable for the installation requirements in different spaces, and the application range is wide.

Preferably, the pipe body is provided with a first medium port, a second medium port, a third medium port and a fourth medium port; the third medium port and the fourth medium port are respectively connected with the starting end and the tail end of the third channel; when the first channel and the second channel are connected in series, the first medium port is connected to the initial end of the first channel or the second channel, and the second medium port is connected to the tail end of the first channel or the second channel; when the first channel and the second channel are connected in parallel, the first medium port is respectively connected with the starting ends of the first channel and the second channel, and the second medium port is respectively connected with the tail ends of the first channel and the second channel. In the technical scheme, the first channel and the second channel are combined together, and only one medium inlet and one medium outlet are formed; when the first channel is connected with the second channel in series, the two channels form a circuitous form, namely the initial end of the first channel is communicated with the tail end of the second channel, or the initial end of the second channel is communicated with the tail end of the first channel, so that the heat exchange aging is prolonged, and the tube pass is increased; when the first channel is connected with the second channel in parallel, namely the initial end of the first channel is communicated with the initial end of the second channel, the tail end of the first channel is communicated with the tail end of the second channel, heat exchange is simultaneously carried out at the two ends, and the performance is better.

A novel double-pipe heat exchanger comprises a plurality of heat exchange pipes; the heat exchange tube is a heat exchange tube as claimed in any one of the preceding claims, and a plurality of heat exchange tubes are connected in parallel.

Drawings

Fig. 1 is a schematic diagram of a series structure of heat exchange tubes.

Fig. 2 is a schematic diagram of a parallel structure of heat exchange tubes.

Fig. 3 is a schematic cross-sectional view of a heat exchange tube.

Fig. 4 is a schematic cross-sectional view of a different tube configuration of a heat exchange tube.

Fig. 5 is a schematic view showing an external structure of a heat exchange tube.

Fig. 6 is a schematic diagram of a parallel structure of a plurality of heat exchange tubes.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The heat exchange tube shown in fig. 1 to 6 comprises a tube body 13, wherein the tube body 13 is of a straight tube structure, a U-shaped structure, a snake-shaped disc structure or a multi-turn track structure; the tube body 13 comprises an outer tube 1, an intermediate tube 2 arranged in the outer tube 1 in a penetrating way, and an inner tube 3 arranged in the intermediate tube 2 in a penetrating way; the middle pipe 2 is a multi-head spiral pipe, the inner pipe 3 is a multi-head spiral pipe or a non-spiral pipe, and the multi-head spiral pipe is formed by enclosing a plurality of pipe edges 7 and pipe grooves 8 formed between the adjacent pipe edges 7; a first channel 4 is arranged between the outer tube 1 and the middle tube 2, a second channel 5 is arranged inside the inner tube 3, and a third channel 6 is arranged between the middle tube 2 and the inner tube 3; it should be noted that when the first channel 4 and the second channel 5 are secondary refrigerant channels and the third channel 6 is a refrigerant channel, fins are arranged on the inner wall of the intermediate tube 2 and the outer wall of the inner tube 3; when the first channel 4 and the second channel 5 are refrigerant channels and the third channel 6 is a secondary refrigerant channel, fins are arranged on the outer wall of the middle tube 2 and the inner wall of the inner tube 3. In the technical scheme, the three-channel structure, the use of the multi-head spiral tube and the arrangement of the fins above the multi-head spiral tube are all used for increasing the heat exchange area inside the tube body, and the heat exchange efficiency is improved.

It should be further noted that the first channel 4 and the second channel 5 may be connected in series or in parallel, and the pipe body 13 is provided with a first medium port 9, a second medium port 10, a third medium port 11 and a fourth medium port 12; the third medium port 11 and the fourth medium port 12 are respectively connected with the starting end and the tail end of the third channel 6; when the first channel 4 and the second channel 5 are connected in series, the first medium port 9 is connected to the initial end of the second channel 5, and the second medium port 10 is connected to the tail end of the first channel 4; when the first channel 4 and the second channel 5 are connected in parallel, the first medium port 9 is connected with the initial ends of the first channel 4 and the second channel 5 respectively, and the second medium port 10 is connected with the tail ends of the first channel 4 and the second channel 5 respectively.

In this embodiment, based on whether channel one 4 and channel two 5 can be connected in series or in parallel, the following conditions exist:

the first embodiment is as follows: when the first channel 4 and the second channel 5 are secondary refrigerant channels and the third channel 6 is a refrigerant channel, the first channel 4 and the second channel 5 are connected in series; the initial end of the first channel 4 is communicated with the tail end of the second channel 5, or the initial end of the second channel 5 is communicated with the tail end of the first channel 4.

The refrigerant enters a third channel 6 from the third medium port 11, flows through the initial end and the tail end of the channel, and exits from the fourth medium port 12 to enter the compressor; the other side of the refrigerating medium flows through the initial end of the first channel 4 from the first medium port 9, flows through the tail end of the second channel 5, adopts a circuitous mode from the tail end of the second channel 5 to the initial end of the second channel 5, prolongs the heat exchange time, increases the tube pass, and finally comes out of the second medium port 10 connected with the tail end of the first channel 4; similarly, the coolant flows from the first medium port 9, first through the beginning of the second channel 5, through the end of the first channel 4, from the end of the first channel 4 to the beginning of the first channel 4, and finally out of the second medium port 10 connected to the end of the second channel 5.

It should be noted that, when the first channel 4, the second channel 5 and the third channel 6 are refrigerant channels, the refrigerant and the coolant respectively flow through the respective channels in the same manner as described above.

Example two: when the first channel 4 and the second channel 5 are refrigerating medium channels and the third channel 6 is a refrigerating medium channel, the first channel 4 is connected with the second channel 5 in parallel; the initial end of the first channel 4 is communicated with the initial end of the second channel 5, and the tail end of the first channel 4 is communicated with the tail end of the second channel 5.

The refrigerant enters a third channel 6 from the third medium port 11, flows through the initial end and the tail end of the channel, and exits from the fourth medium port 12 to enter the compressor; the other side of the refrigerating medium firstly flows through the initial ends of the first channel 4 and the second channel 5 from the first medium port 9, then simultaneously flows to the tail ends of the first channel 4 and the second channel 4 respectively, and finally flows out from the second medium port 10 connected with the tail end of the first channel 4 and the tail end of the second channel 5; the heat exchanger adopts a mode of simultaneous heat exchange at two ends, and has better effect.

When the first channel 4, the second channel 5 and the third channel 6 are refrigerant channels, the refrigerant and the coolant respectively flow through the respective channels in the same manner as described above.

Example three: a novel sleeve-type heat exchanger comprises a plurality of heat exchange tubes which are connected in parallel.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

1. A heat exchange tube comprises a tube body (13), wherein the tube body (13) comprises an outer tube (1), a middle tube (2) penetrating in the outer tube (1) and an inner tube (3) penetrating in the middle tube (2); a first channel (4) is arranged between the outer pipe (1) and the middle pipe (2), a second channel (5) is arranged inside the inner pipe (3), and a third channel (6) is arranged between the middle pipe (2) and the inner pipe (3); the method is characterized in that: the first channel (4) and the second channel (5) are connected in series or in parallel.

2. A heat exchange tube according to claim 1, wherein: the middle tube (2) is a multi-head spiral tube, the inner tube (3) is a multi-head spiral tube or a non-spiral tube, and fins are arranged on the inner wall and/or the outer wall of the middle tube (2) and the inner tube (3).

3. A heat exchange tube according to claim 2, wherein: when the first channel (4) and the second channel (5) are secondary refrigerant channels and the third channel (6) is a refrigerant channel, fins are arranged on the inner wall of the middle tube (2) and the outer wall of the inner tube (3).

4. A heat exchange tube according to claim 2, wherein: when the first channel (4) and the second channel (5) are refrigerant channels and the third channel (6) is a secondary refrigerant channel, fins are arranged on the outer wall of the middle tube (2) and the inner wall of the inner tube (3).

5. A heat exchange tube according to claim 2, wherein: the multi-head spiral pipe is formed by enclosing a plurality of pipe edges (7) and pipe grooves (8) formed between the adjacent pipe edges (7).

6. A heat exchange tube according to any one of claims 1 to 5, wherein: the pipe body (13) is of a straight pipe structure, a U-shaped structure, a snake-shaped disc structure or a multi-ring runway structure.

7. A heat exchange tube according to claim 1, wherein: a first medium port (9), a second medium port (10), a third medium port (11) and a fourth medium port (12) are formed in the pipe body (13); the third medium port (11) and the fourth medium port (12) are respectively connected with the starting end and the tail end of the channel III (6); when the first channel (4) and the second channel (5) are connected in series, the first medium port (9) is connected to the initial end of the second channel (5), and the second medium port (10) is connected to the tail end of the first channel (4); when the first channel (4) and the second channel (5) are connected in parallel, the first medium port (9) is respectively connected with the starting ends of the first channel (4) and the second channel (5), and the second medium port (10) is respectively connected with the tail ends of the first channel (4) and the second channel (5).

8. A novel double-pipe heat exchanger is characterized in that: comprises a plurality of heat exchange tubes; the heat exchange tube is a heat exchange tube according to any one of claims 1 to 7, a plurality of which are connected in parallel.