CN216409854U - Coaxial heat exchanger - Google Patents

Abstract

The utility model provides a coaxial heat exchanger, which comprises an outer tube, an inner tube is inserted in the outer tube, the outer tube and the inner tube are coaxial, the first end and the second end of the inner pipe are respectively provided with a first medium inlet pipe and a first medium outlet pipe, the first medium inlet pipe and the first medium outlet pipe extend from the pipe openings of the first end and the second end of the outer pipe respectively, the first end and the second end of the outer pipe are respectively provided with a clamping part, the first medium inlet pipe and the first medium outlet pipe are fixed at the pipe orifice of the outer pipe through the clamping parts, a second medium inlet pipe and a second medium outlet pipe are respectively and fixedly connected with the first end pipe orifice and the second end pipe orifice of the outer pipe through the clamping part, so that the second medium inlet pipe and the second medium outlet pipe communicate with the interstitial space between the outer pipe and the inner pipe.

Description

Coaxial heat exchanger

Technical Field

The utility model relates to the field of heat exchangers, in particular to a coaxial heat exchanger.

Background

The coaxial heat exchanger consists of an inner pipe and an outer sleeve which are concentric, and cold and hot fluids flow in annular gaps of the inner pipe and the outer sleeve respectively and exchange and transfer heat simultaneously. Compared with other heat exchangers, the coaxial heat exchanger has the advantages of pressure resistance, shock resistance, difficult deformation, dirt resistance, difficult blockage, smooth oil return, high safety, good manufacturability, difficult leakage, flexible structure, convenient arrangement, low price, cost saving and the like, and is particularly suitable for a heat pump system. Meanwhile, the gaps between the steel pipes and the copper pipes are uniformly divided, so that the good oil return characteristic is kept when the evaporator is used. The inner pipe and the outer pipe are made of red copper, stainless steel and the like, and are widely applied to refrigeration and air-conditioning industries such as a water chilling unit, an air-cooling/water-cooling heat pump unit, a water source/ground source heat pump unit, a heat recovery unit, a heat pump water heater and the like.

However, the inlet and outlet of the cold medium and the heat medium of the existing coaxial heat exchanger need to be connected by using a three-way pipe, and the inlet pipe and the outlet pipe of the cold medium and the heat medium are connected by the three-way pipe, so that the heat exchanger is conveniently connected with other devices, the process is more, the connection structure is more complex, time and labor are wasted, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need for a coaxial heat exchanger.

In order to solve the above technical problems, the present invention provides a coaxial heat exchanger, comprising an outer tube, an inner tube inserted in the outer tube, the outer pipe is coaxial with the inner pipe, a first medium inlet pipe and a first medium outlet pipe are respectively arranged at the first end and the second end of the inner pipe, the first medium inlet pipe and the first medium outlet pipe extend from the pipe openings of the first end and the second end of the outer pipe respectively, the first end and the second end of the outer pipe are respectively provided with a clamping part, the first medium inlet pipe and the first medium outlet pipe are fixed at the pipe orifice of the outer pipe through the clamping parts, a second medium inlet pipe and a second medium outlet pipe are respectively and fixedly connected with the first end pipe orifice and the second end pipe orifice of the outer pipe through the clamping part, so that the second medium inlet pipe and the second medium outlet pipe communicate with the interstitial space between the outer pipe and the inner pipe.

Preferably, the first medium inlet pipe and the first medium outlet pipe are distal pipe ends of a first end and a second end of the inner pipe, respectively, the clamping portion is made by extruding a distal pipe end of the outer pipe, and the shape of the clamping portion matches the shape of the first medium inlet pipe and the second medium inlet pipe and/or the shape of the first medium outlet pipe and the second medium outlet pipe.

Preferably, the first medium inlet pipe and the second medium inlet pipe are arranged side by side, the first medium outlet pipe and the second medium outlet pipe are arranged side by side, and the second medium inlet pipe and the second medium outlet pipe are respectively inserted into pipe orifices at two ends of the outer pipe in an aligned manner.

Preferably, the contact positions between the outer walls of the first medium inlet pipe, the first medium outlet pipe, the second medium inlet pipe and the second medium outlet pipe and the inner wall of the clamping part are fixed through welding, so that the sealing function is achieved.

Preferably, the outer pipe is a multilayer spiral pipeline which is spirally wound from bottom to top layer by layer, and the spiral pipeline is formed by winding different reducing elbows circle by circle.

Preferably, the outer tube is externally connected with a foot margin for fixing the outer tube.

Preferably, the outer pipe and the inner pipe are both made of metal.

The utility model has the beneficial effects that: the clamping parts are respectively arranged at the pipe orifices at the two ends of the outer pipe, so that the inlet pipe and the outlet pipe are fixedly connected at the inlet and the outlet of the outer pipe, and the structure that three-way pipes are used for connection at the inlet and the outlet of the outer pipe is improved, so that the connecting structure of the outer pipe is simplified, time and labor are saved, and the cost is effectively reduced; the outer tube spirals to the return bend of different reducing, can make full use of spiral space in the middle of the return bend, effectively reduces total occupation of land space, avoids the waste in space, and under equal area, effective heat exchange pipe section increases, has increased the heat exchange efficiency of heat exchanger under the equal cost.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments of the utility model, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the utility model.

FIG. 1 is a schematic perspective view of a preferred embodiment of the present invention;

FIG. 2 is a schematic top view of a preferred embodiment of the present invention;

FIG. 3 is a schematic perspective view of a preferred embodiment of the present invention with the first media inlet pipe and the first media outlet pipe unconnected;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic front view of FIG. 3;

in the figure: an outer tube 1; a second medium inlet pipe 11; the second medium outlet pipe 12; a clamping portion 13; an inner tube 2; a first medium inlet pipe 21; the first medium outlet pipe 22; and (4) ground feet.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, the present invention provides a coaxial heat exchanger, including an outer tube 1, an inner tube 2 inserted into the outer tube 1, the outer tube 1 being coaxial with the inner tube 2, a first medium inlet tube 21 and a first medium outlet tube 22 respectively disposed at a first end and a second end of the inner tube 2, the first medium inlet tube 21 and the first medium outlet tube 22 respectively extending from a tube orifice of the first end and a second end of the outer tube 1, a clamping portion 13 disposed at a first end and a second end of the outer tube 1, the first medium inlet tube 21 and the first medium outlet tube 22 being fixed at a tube orifice of the outer tube 1 by the clamping portion 13, a second medium inlet tube 11 and a second medium outlet tube 12 being fixedly connected at the first end and the second end of the outer tube 1 by the clamping portion 13, respectively, such that the second medium inlet tube 11 and the second medium outlet tube 12 and a clearance cavity between the outer tube 1 and the inner tube 2 are formed by the second medium inlet tube 11 and the second medium outlet tube 12 Are communicated with each other. The inner tube 2 is circulated with a first medium, the clearance cavity between the outer tube 1 and the inner tube 2 is circulated with a second medium, and the first medium and the second medium can exchange heat.

Referring to fig. 3-5, in a preferred embodiment, the first media inlet pipe 21 and the first media outlet pipe 22 are terminal pipe ends of the first end and the second end of the inner pipe 2, respectively, the clamping portion 13 is extruded from the terminal pipe end of the outer pipe 1, the shape of the clamping portion 13 matches the shape of the first media inlet pipe 21 and the second media inlet pipe 22 and/or the shape of the first media outlet pipe 11 and the second media outlet pipe 12.

Referring to fig. 1, in a preferred embodiment, the first medium inlet pipe 21 is arranged side by side with the second medium inlet pipe 11, the first medium outlet pipe 22 is arranged side by side with the second medium outlet pipe 12, and the second medium inlet pipe 11 and the second medium outlet pipe 12 are respectively inserted in opposite directions at both end mouths of the outer pipe 1.

Referring to fig. 1, in a preferred embodiment, the contact points between the outer walls of the first medium inlet pipe 21, the first medium outlet pipe 22, the second medium inlet pipe 11 and the second medium outlet pipe 12 and the inner wall of the clamping part 13 are fixed by welding, thereby performing a sealing function.

Referring to fig. 1-5, in a preferred embodiment, the outer pipe 1 is a multi-layer spiral pipe which is formed by winding different reducing elbows one by one and spiraling upwards layer by layer. The coil pipes are coiled into a disc from inside to outside, so that the pipe bending layers are coiled and then superposed, the space in the middle of the coiled pipe bending can be fully utilized, and the waste of the space is avoided.

Referring to fig. 1 and 2, in a preferred embodiment, the outer tube 1 is externally connected with a ground pin 4 for fixing the outer tube 1.

Referring to fig. 1, in a preferred embodiment, the outer tube 1 and the inner tube 2 are made of metal.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the terms "preferred embodiment," "yet another embodiment," "other embodiments," or "specific examples," etc., means 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 application. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (7)

1. A coaxial heat exchanger is characterized by comprising an outer pipe, an inner pipe is inserted in the outer pipe, the outer pipe is coaxial with the inner pipe, a first medium inlet pipe and a first medium outlet pipe are respectively arranged at the first end and the second end of the inner pipe, the first medium inlet pipe and the first medium outlet pipe extend from the pipe openings of the first end and the second end of the outer pipe respectively, the first end and the second end of the outer pipe are respectively provided with a clamping part, the first medium inlet pipe and the first medium outlet pipe are fixed at the pipe orifice of the outer pipe through the clamping parts, a second medium inlet pipe and a second medium outlet pipe are respectively and fixedly connected with the first end pipe orifice and the second end pipe orifice of the outer pipe through the clamping part, so that the second medium inlet pipe and the second medium outlet pipe communicate with the interstitial space between the outer pipe and the inner pipe.

2. A heat exchanger according to claim 1, wherein the first medium inlet pipe and the first medium outlet pipe are terminal pipe ends of a first end and a second end of the inner pipe, respectively, and the clamping portion is extruded from the terminal pipe end of the outer pipe, the clamping portion having a shape matching the shape of the first medium inlet pipe and the second medium inlet pipe and/or the first medium outlet pipe and the second medium outlet pipe.

3. The heat exchanger as claimed in claim 2, wherein the first medium inlet pipe and the second medium inlet pipe are arranged side by side, the first medium outlet pipe and the second medium outlet pipe are arranged side by side, and the second medium inlet pipe and the second medium outlet pipe are respectively inserted into pipe orifices at two ends of the outer pipe in an opposite direction.

4. The heat exchanger as claimed in claim 2, wherein the contact portions between the outer walls of the first medium inlet pipe, the first medium outlet pipe, the second medium inlet pipe and the second medium outlet pipe and the inner wall of the clamping portion are fixed by welding so as to perform a sealing function.

5. The heat exchanger of claim 3, wherein the outer tube is a multi-layer coiled tube that spirals from bottom to top layer by layer, and the coiled tube is formed by winding different reducing elbows one by one.

6. The heat exchanger of claim 1, wherein a ground pin for fixing the outer tube is connected to the outer tube.

7. The heat exchanger of claim 4, wherein the outer tube and the inner tube are both metal.

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