CN204514129U - Double-tube heat exchanger - Google Patents

Abstract

The utility model discloses a bushing heat exchanger, which comprises a bushing with an inlet end and an outlet end, an inner tube parallel to the axis of the bushing and an inner tube parallel to the axis of the bushing are arranged in the bushing and fixed at intervals along the length direction of the bushing. The fixing frame of the inner tube, the inner tube includes a central tube and an eccentric tube, the eccentric tubes are evenly distributed on at least one circle concentric with the central tube, and the central tube and the eccentric tube are at both ends connected to form a first flow channel, and a second flow channel is formed outside the inner tube of the sleeve, the two ends of the second flow channel are connected to the inlet port and the outlet port, and an inlet port is also provided on the sleeve tube A tube and an outlet tube, the inlet tube and the outlet tube are connected at both ends of the first flow channel. Compared with the prior art, the heat exchange area of the heat exchange tube of the utility model is significantly increased, and the heat exchange effect is increased by 10%. At the same time, the use of small channels can reduce pressure loss while ensuring the heat exchange effect, which plays a very good role in energy saving.

Description

Tube heat exchanger

technical field

The utility model relates to a heat exchanger, in particular to a small casing heat exchanger.

Background technique

At present, the casing heat exchanger has a wide range of applications. In order to obtain greater heat exchange efficiency, the conventional casing heat exchanger is usually made by inserting a spiral tube into an outer casing, or using a large copper tube to shrink and pull it into a multi-head spiral tube. Increase the heat exchange area, but the actual area of the heat exchanger with this type of structure does not increase, but the large copper tube is folded and reduced, and the material cost is high, resulting in a large volume of the entire heat exchanger.

Contents of the invention

The technical problem to be solved by the utility model is to provide an energy-saving casing heat exchanger capable of improving heat exchange efficiency and reducing material cost within a limited volume in view of the above-mentioned deficiencies in the prior art.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A bushing heat exchanger, comprising a bushing with an inlet end and an outlet end, characterized in that: an inner tube parallel to the axis of the bushing is also arranged in the bushing, and fixing stations are arranged at intervals along the length direction of the bushing. The fixed frame of the inner tube, the inner tube includes a central tube and an eccentric tube, the eccentric tubes are evenly distributed on at least one circle concentric with the central tube, and the central tube and the eccentric tube communicate at both ends A first flow channel is formed, and a second flow channel is formed outside the inner tube of the sleeve, the two ends of the second flow channel are connected to the inlet end and the outlet end, and an inlet pipe is also provided on the sleeve and an outlet pipe, the inlet pipe and the outlet pipe are connected to the two ends of the first flow channel; the diameter of the central pipe is 3-5mm, and the diameter of the eccentric pipe is 3-5mm; the fixing frame includes a central pipe sleeve and At least one circle of eccentric sleeves distributed on the periphery of the central sleeve, the eccentric sleeve and the central sleeve are fixed by connecting rods, the central pipe is located in the central sleeve, and the eccentric The tube is located in the eccentric sleeve.

The casing is in a spiral shape.

The heat exchanger also includes a bracket, and the sleeve is arranged on the bracket.

Connectors are respectively connected to the inlet end and the outlet end of the sleeve.

In the casing heat exchanger of the utility model, the inner tube composed of the central tube and the eccentric tube is fixed by a fixing frame in the casing, and the first flow channel is formed by the inner tube, and the second flow channel is formed between the casing tube and the inner tube, and The heat is exchanged through the first flow channel and the second flow channel. The inner tube adopts a small channel with a diameter of 3-5mm. The use of a small channel can reduce the refrigerant charge and withstand higher pressure, which is beneficial to toxic or flammable refrigeration. The use of the agent can also be better used for high-pressure working fluid, which greatly improves the application range of the heat exchanger, and at the same time increases the heat exchange area of the first flow channel and the second flow channel, and improves the heat exchange efficiency.

Compared with the prior art, the utility model has the following advantages:

The diameter and material of the heat exchange tube of the utility model are not increased, but the heat exchange area is significantly increased, so the heat exchange efficiency is greatly improved in a limited volume. Compared with the original one, the heat exchange effect is increased by 10%. At the same time, if the spiral tube is replaced with several small channels in the inner tube, the disturbance of the fluid outside the inner tube is obviously smaller than that when the fluid flows with the spiral groove outside the spiral tube, and the pressure loss is also significantly reduced, so the use of small channels can ensure The heat exchange effect reduces pressure loss at the same time, which plays a very good role in energy saving.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a side view of FIG. 1 .

Fig. 3 is a schematic cross-sectional view of the sleeve.

Among them: 1. Sleeve, 2. Bracket, 3. Inner tube, 31. Center tube, 32. Eccentric tube, 4. Fixing frame, 5. Joint, 6. Medium tube.

Detailed ways

Referring to Figures 1 to 3, the utility model is a casing heat exchanger, which includes a casing 1 and a bracket 2. Wherein the casing 1 is arranged in a spiral shape, and the inner pipe 3 is fixed in the casing 1 through the fixing frame 4, the first flow path is formed between the two ends of the inner pipe, and the second flow path is formed outside the inner pipe of the casing, wherein The inner tube 3 includes a central tube and an eccentric tube 32, the eccentric tubes are arranged on the concentric circles of the inner tube 3, and the eccentric tubes can be one circle or multiple circles. The diameters of the central pipe 31 and the eccentric pipe 32 are the same or different, and the diameter is 3-5mm. The fixing frame 4 includes a central sleeve and at least one circle of eccentric sleeves distributed on the periphery of the central sleeve. The eccentric sleeve and the central sleeve are fixed by connecting rods. The central tube is located in the central sleeve, and the eccentric tube is located in the eccentric sleeve. Inside.

Joints 5 are connected to both ends of the casing 1, and the joints 5 communicate with the second flow channel. A medium pipe 6 is arranged on each joint 5, and the two medium pipes arranged on the joint are respectively an inlet pipe and an outlet pipe communicating with the first flow channel.

When the heat exchanger of the utility model is in use, two kinds of heat exchange fluids flow into the first flow channel and the second flow channel respectively through the joint and the medium pipe, and the two fluids flow countercurrently in the casing cavity to realize heat exchange.

Claims (4)

1. a double-tube heat exchanger, comprise the sleeve pipe with arrival end and the port of export, it is characterized in that: be also provided with in described sleeve pipe and described casing axis parallel in manage and prolong the fixed mount that interval, casing length direction arranges fixing described interior pipe, described interior pipe comprises central tube and eccentric pipe, described eccentric pipe is evenly distributed at least one circle concentric with described central tube, described central tube and eccentric pipe are communicated with formation first flow at two ends, in described sleeve pipe, pipe outside forms the second runner, the two ends of this second runner are connected with described arrival end and the port of export, described sleeve pipe is also provided with inlet tube and outlet, this inlet tube and outlet are connected to the two ends of described first flow, the diameter of described central tube is 3-5mm, and the diameter of described eccentric pipe is 3-5mm, fixed mount comprises center pipe box and is distributed in the eccentric pipe box of at least one circle of pipe box periphery, described center, fixed by connecting rod between described eccentric pipe box and center pipe box, described central tube is positioned at described center pipe box, and described eccentric pipe is positioned at described eccentric pipe box.

2. double-tube heat exchanger according to claim 1, is characterized in that: described sleeve pipe curl.

3. double-tube heat exchanger according to claim 1 and 2, is characterized in that: described heat exchanger also includes support, and described sleeve pipe is arranged on support.

4. double-tube heat exchanger according to claim 1 and 2, is characterized in that: be connected to joint at the arrival end of described sleeve pipe and the port of export.