A shell-and-tube heat exchanger provided with a split-flow pressurization

Abstract

The application discloses a casing heat exchanger provided with a pressure distribution and expansion device, which comprises an outer pipe, an inner pipe, an inlet three-way pipe fitting and an outlet three-way pipe fitting. The inner pipe is arranged in the outer pipe, and the two ends of the inner pipe respectively extend out of the straight pipes of the inlet three-way pipe fitting and the outlet three-way pipe fitting. The other ends of the straight pipes of the inlet three-way pipe fitting and the outlet three-way pipe fitting are connected with the outer pipe. The gap between the inner pipe and the outer pipe forms an annular refrigerant channel. The end of the outer pipe located in the straight pipe of the inlet three-way pipe fitting is closed to form a pressure expansion device. The refrigerant enters the straight pipe through the branch pipe of the inlet three-way pipe fitting, and then enters the annular refrigerant channel through the pressure expansion device. The pressure expansion device is arranged at the connection end of the outer pipe and the inlet three-way pipe fitting. After the refrigerant enters the straight pipe through the branch pipe, the refrigerant flows slowly. The refrigerant is expanded and pressurized through the pressure expansion device, the refrigerant is uniformly distributed, the flow rate is high, and the heat exchange efficiency and energy efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump device especially a kind of double-pipe heat exchanger for heat pump. BACKGROUND

[0002] The prior art currently, a kind of double-pipe heat exchanger, including outer tube, inner tube, into three-way pipe fitting and out three-way pipe fitting, inner tube is located in outer tube, inner tube two ends respectively pass through the straight pipe of into three-way pipe fitting and out three-way pipe fitting and extend, outer tube is connected with the other end of the straight pipe of respectively into three-way pipe fitting and out three-way pipe fitting, the gap between inner tube and outer tube constitutes annular refrigerant passage. There is a problem: further heat pump cooling and heating unit has very wide application in southern market, and the existing double-pipe heat exchanger as evaporator is applied in heat pump cold water machine, and the performance of capacity, energy efficiency is poor. SUMMARY

[0003] The utility model aims at providing a kind of double-pipe heat exchanger of setting shunt pressurization, it has the characteristics of high heat exchange capacity, high energy efficiency.

[0004] The utility model is realized as follows: a kind of double-pipe heat exchanger of setting shunt pressurization, including outer tube, inner tube, into three-way pipe fitting and out three-way pipe fitting, inner tube is located in outer tube, inner tube two ends respectively pass through the straight pipe of into three-way pipe fitting and out three-way pipe fitting and extend, outer tube is connected with the other end of the straight pipe of respectively into three-way pipe fitting and out three-way pipe fitting, the gap between inner tube and outer tube constitutes annular refrigerant passage;Its special feature is that: the one end of the straight pipe of outer tube in into three-way pipe fitting is closed and constitutes pressurization diffusion device, refrigerant enters the straight pipe into, and then pressurization diffusion device enters annular refrigerant passage by the branch pipe of into three-way pipe fitting.

[0005] The special feature of the double-pipe heat exchanger of setting shunt pressurization is that: the pressurization diffusion device is the circular conical frustum pipe of being located in the gas inlet end of outer tube, and the bottom round end of circular conical frustum pipe is connected with outer tube.

[0006] The special feature of the double-pipe heat exchanger of setting shunt pressurization is that: the pipe wall of circular conical frustum pipe is wave-shaped, and the wave trough is attached to the inner tube.

[0007] The special feature of the double-pipe heat exchanger of setting shunt pressurization is that: the pressurization diffusion device is the hemispherical part of being located in the gas inlet end of outer tube, and the overhanging end of hemispherical part is equipped with gas guide pressurization hole.

[0008] The special feature of the double-pipe heat exchanger of setting shunt pressurization is that: the inner tube is made of copper material, and the inner tube is equipped with exchange fin or inner tube spiral rolling pressure.

[0009] Outer tube is made of steel material.

[0010] The utility model discloses a sleeve type heat exchanger of setting shunt pressurization, and the outer tube is provided with pressurized diffusion devices at the connecting end with the inlet three-way pipe fitting, the refrigerant enters the straight pipe through the branch pipe and then flows slowly, the refrigerant is pressurized and diffused through the pressurized diffusion devices, the refrigerant is uniformly distributed and has high flow rate, and the heat exchange efficiency and energy efficiency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the front view of the utility model.

[0012] Figure 2 It is Figure 1 A-A view of.

[0013] Figure 3 It is Figure 1 B-B view of.

[0014] Figure 4 It is the perspective view of the utility model. DETAILED DESCRIPTION

[0015] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model and cannot be understood as limiting the utility model.

[0016] In the description of the utility model, it is necessary to explain that, unless another explicit provision and limitation, the terms "mounting", "connecting" and "connecting" should be understood broadly, for example, can be fixed connection, can be detachable connection or integrally connected, can be directly connected or indirectly connected through intermediate medium, and can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0017] As Figure 1 Shown, a kind of sleeve type heat exchanger of setting shunt pressurization, including outer tube 1, inner tube 2, inlet three-way pipe fitting 3 and outlet three-way pipe fitting 4, inner tube 2 is arranged in outer tube 1, inner tube 2 two ends respectively pass through the straight pipe of inlet three-way pipe fitting 3 and outlet three-way pipe fitting 4 and extend, outer tube 1 is connected with the other end of the straight pipe of respectively inlet three-way pipe fitting 3 and outlet three-way pipe fitting 4, the gap between inner tube 2 and outer tube 1 constitutes annular refrigerant passage;

[0018] The outer tube 1 is located in the straight pipe 31 of inlet three-way pipe fitting 3 One end of the straight pipe 31 is closed to form a pressurized diffusion device, the refrigerant enters the straight pipe 31 through the branch pipe 32 of inlet three-way pipe fitting 3, and then enters the annular refrigerant passage through the pressurized diffusion device, or in other words: into the outer tube 1.

[0019] The pressurized diffusion device is a frustoconical tube 11 located at the air inlet end of the outer tube 1, with the bottom round end of the frustoconical tube 11 connected to the outer tube 1.

[0020] like Figure 3 The conical tube 11 shown has a wavy wall, with the trough at the top rounded end fitting into the inner tube 2. The crest and the inner tube 2 form a flow-dividing structure, allowing the high-speed liquid refrigerant injected from the refrigerant inlet to be decelerated and diverted through the flow-dividing structure, flowing evenly into the heat exchanger and achieving full evaporation.

[0021] This invention can also be implemented as follows: the pressurized diffusion device is a hemispherical part located at the air inlet end of the outer pipe 1, and the suspended end of the hemispherical part is provided with an air guiding and pressurizing hole.

[0022] The inner tube 2 is made of copper and has fins or is spirally rolled; the outer tube 1 is made of steel.

[0023] 1. When used as an evaporator, the shell-and-tube heat exchanger can produce high cooling capacity and energy efficiency; 2. It has a simple structure and does not require additional material costs; 3. When the working fluid in the inner tube of the shell-and-tube heat exchanger is water, it is not easy to freeze due to the large amount of water, so it is not easily damaged.

[0024] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A coaxial heat exchanger with a flow-dividing and pressurized configuration, comprising an outer tube, an inner tube, an inlet tee fitting, and an outlet tee fitting, wherein the inner tube is disposed inside the outer tube, and both ends of the inner tube extend out through straight pipes of the inlet tee fitting and the outlet tee fitting, respectively; the outer tube is connected to the other ends of the straight pipes of the inlet tee fitting and the outlet tee fitting, respectively; the gap between the inner tube and the outer tube forms an annular refrigerant channel; characterized in that: The outer pipe is located at one end inside the straight pipe of the inlet tee fitting, forming a pressurized diffusion device. The refrigerant enters the straight pipe through the branch pipe of the inlet tee fitting, and then enters the annular refrigerant channel through the pressurized diffusion device.

2. A shell-and-tube heat exchanger with flow diversion and pressurization as described in claim 1, characterized in that: The pressurized diffusion device is a frustoconical tube located at the air inlet end of the outer tube, with the bottom round end of the frustoconical tube connected to the outer tube.

3. A shell-and-tube heat exchanger with a flow-diverting pressurization configuration according to claim 2, characterized in that: The wall of the truncated cone tube is wavy, and the troughs of the wavy tube are in contact with the inner tube.

4. A shell-and-tube heat exchanger with flow diversion and pressurization as described in claim 1, characterized in that: The pressurized diffusion device is a hemispherical part located at the air inlet end of the outer pipe, and the suspended end of the hemispherical part is provided with an air guiding and pressurizing hole.

5. A shell-and-tube heat exchanger with a flow-diverting pressurization configuration according to claim 1, 2, 3, or 4, characterized in that: The inner tube is made of copper and is equipped with fins or spiral rolling. The outer tube is made of steel.

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