Vertical Rotary Heat Exchange Tube Evaporator

Abstract

The invention discloses a vertical rotary heat exchange tube evaporator, comprising a vertical cylinder with a refrigerant inlet pipe and a refrigerant outlet pipe, a tube sheet slidably sealed and connected to both ends of the cylinder, an upper head and a lower head slidably sealed and connected to the tube sheet respectively, two circles of heat exchange tubes with open ends are arranged vertically in an annular manner between the two tube sheets, and the upper tube sheet is connected to a motor; the upper head is provided with an air duct; the lower head is provided with a refrigerant outlet pipe and a refrigerant liquid inlet pipe; a cylindrical partition with one end slidably sealed and connected to the lower tube sheet is provided in the cavity between the lower head and the lower tube sheet to separate the outer circle heat exchange tube and the inner circle heat exchange tube; the refrigerant liquid inlet pipe extends into the lower head and is connected to the orifice on the partition. The invention can use a motor to drive the heat exchange tube to rotate, increase the fluid and disturbance outside the tube, and under the action of centrifugal force, the liquid in the heat exchange tube always adheres to the inner wall of the heat exchange tube, strengthens the heat transfer effect between the refrigerant in the heat exchange tube and the refrigerant outside the tube, and at the same time enhances the refrigerant disturbance outside the tube, thereby improving the performance of the refrigeration system.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration and air-conditioning systems, and in particular to a vertical rotary heat exchange tube evaporator of a refrigeration and air-conditioning system. Background Art

[0002] In the refrigeration and air-conditioning system, the shell and tube evaporator cools the refrigerant liquid. When the refrigerant flows in the heat exchange tube, the gas formed by absorbing heat and evaporating occupies the space inside the heat exchange tube, making it impossible for the surface of the heat exchange tube to fully exchange heat with the refrigerant outside the tube, resulting in a decrease in heat transfer performance, a decrease in evaporation temperature, an increase in the pressure ratio of the refrigeration compressor, a decrease in the performance of the refrigeration system, and an increase in energy consumption. The development of an evaporator with high efficiency heat transfer can effectively improve the heat transfer efficiency of the evaporator and improve the performance of the refrigeration system. Summary of the invention

[0003] The purpose of the present invention is to provide a vertical rotary heat exchange tube evaporator for a refrigeration and air conditioning system in view of the technical defects existing in the prior art, so as to solve the problem of efficient heat transfer of the evaporator, improve the performance of the refrigeration system and save energy.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A vertical rotary heat exchange tube evaporator comprises a vertical cylinder with a refrigerant inlet pipe and a refrigerant outlet pipe, a tube sheet slidably and sealably connected to both ends of the cylinder, an upper head and a lower head slidably and sealably connected to the tube sheets respectively, two circles of heat exchange tubes with open ends are arranged vertically in an annular manner between the two tube sheets, and the upper tube sheet is connected to a motor; the upper head is provided with an air duct; the lower head is provided with a refrigerant air outlet pipe and a refrigerant liquid inlet pipe; a cylindrical partition with one end slidably and sealably connected to the lower tube sheet is provided in the cavity between the lower head and the lower tube sheet to separate the outer circle heat exchange tubes and the inner circle heat exchange tubes; the refrigerant liquid inlet pipe extends into the lower head and is connected to the orifice on the partition.

[0006] The coolant inlet pipe and the coolant outlet pipe are respectively installed at tangential positions of the cylinder close to the upper tube plate and the lower tube plate.

[0007] Wherein, the coolant inlet pipe and the coolant outlet pipe are respectively connected to the outlet pipe and the inlet pipe used for coolant circulation.

[0008] The upper end cap and the cylinder are respectively fixed by welding to the two ends of the upper connecting frame, and the lower end cap and the cylinder are respectively fixed by welding to the two ends of the lower connecting frame.

[0009] Wherein, the air duct and the refrigerant outlet pipe are connected to the air inlet pipe of the refrigeration compressor.

[0010] Wherein, the other end of the partition is welded and fixed to the inner wall of the closed end of the lower head.

[0011] The vertical rotary heat exchange tube evaporator of the present invention can utilize a motor to drive the tube plate to rotate through a main shaft, that is, to drive the heat exchange tube to rotate, thereby increasing the disturbance of the fluid outside the tube. Under the action of centrifugal force, the liquid in the heat exchange tube always adheres to the inner wall of the heat exchange tube, thereby strengthening the heat transfer effect between the refrigerant in the heat exchange tube and the coolant outside the tube, and at the same time enhancing the disturbance of the coolant outside the tube, thereby improving the performance of the refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Shown is a schematic diagram of a vertical rotary heat exchange tube evaporator of the present invention;

[0013] Figure 2 Shown Figure 1 AA section view. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1 and Figure 2 As shown, the vertical rotary heat exchange tube evaporator of the present invention includes an upper head 1, a main shaft 2, a motor 3, an air duct 4, an upper tube plate 5, an outer ring heat exchange tube 6, a cylinder 7, a refrigerant air outlet pipe 8, a partition 9, a refrigerant liquid inlet pipe 10, a lower head 11, a lower tube plate 12, an inner ring heat exchange tube 13, a coolant inlet pipe 14, a coolant outlet pipe 15, an upper connecting frame 16, and a lower connecting bracket 17.

[0016] Among them, the outer ring heat exchange tube 6 and the inner ring heat exchange tube 13 are round tubes with open ends, and the outer circles of the two ends are sealed and fixedly connected to the upper tube plate 5 and the lower tube plate 12 respectively; the upper head 1 is a cylindrical shape with one end closed, and a through hole is opened in the center of the closed end for the main shaft to pass through, and another through hole is opened to be welded and connected to the air duct 4; the lower head 11 is a cylindrical shape with one end closed, and a through hole is opened on one side wall, through which the refrigerant outlet pipe 8 passes and is welded, and a through hole is opened on the other side wall, through which the refrigerant liquid inlet pipe 10 passes and is welded; the partition 9 is cylindrical and located at the lower head In the head 11, the outer ring heat exchange tube 6 and the inner ring heat exchange tube 13 are separated, one end of which is welded to the inner wall of the closed end of the lower head 11, and the other end is sealed and matched with the lower tube plate 12, and can slide relatively. A through hole is opened at the hole position corresponding to the lower head 11, and the refrigerant liquid inlet pipe 10 passes through and is welded and connected; the center of the upper tube plate 5 is fixedly connected to the main shaft, and the edges of the two side surfaces are respectively sealed and matched with one end of the upper head 1 and the cylinder 7, and can slide relatively; the edges of the two side surfaces of the lower tube plate 12 are respectively sealed and matched with the other end of the lower head 11 and the cylinder 7, and can slide relatively.

[0017] The upper end cap 1 is fixed to the cylinder 7 and the upper connecting frame 16 at both ends by welding, and the lower end cap 11 is fixed to the cylinder 7 and the lower connecting frame 17 at both ends by welding.

[0018] The cylinder body 7 is cylindrical, and holes are opened on the cylinder wall at the tangential position close to the upper tube plate 5 and the lower tube plate 12, which are respectively welded to the coolant inlet pipe 14 and the coolant outlet pipe 15.

[0019] The refrigerant inlet pipe 14 and the refrigerant outlet pipe 15 are respectively connected to the outlet pipe and the inlet pipe of the refrigerant circulation; the air duct 5 and the refrigerant outlet pipe 11 are connected to the air inlet pipe of the refrigeration compressor.

[0020] When the refrigeration system is running, the refrigerant liquid at the outlet of the throttling and pressure reducing element enters the internal space of the partition 9 of the lower head 11 through the refrigerant liquid inlet pipe 10, and enters each inner ring heat exchange tube 13 respectively, exchanges heat with the refrigerant outside the tube, enters the upper head 1, and the formed gas is led out through the air duct 4, and the liquid enters each outer ring heat exchange tube 6. The motor 3 drives the upper tube plate 5 to rotate through the main shaft 2, and drives the inner ring heat exchange tube 13 and the outer ring heat exchange tube 6 to rotate. Under the action of centrifugal force, the liquid in the heat exchange tube is always attached to the inner wall of the heat exchange tube, and the liquid in the outer ring heat exchange tube 6 continues to exchange heat with the refrigerant outside the tube, and the generated gas returns to the refrigeration compressor through the refrigerant outlet pipe 8.

[0021] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A vertical rotary heat exchange tube evaporator, characterized in that: It comprises a vertical cylinder with a coolant inlet pipe and a coolant outlet pipe, tube sheets which are slidingly and sealingly connected to the two ends of the cylinder, an upper head and a lower head which are slidingly and sealingly connected to the tube sheets respectively, two circles of heat exchange tubes which are open at both ends are arranged vertically in an annular manner between the two tube sheets, and the upper tube sheet is connected to the motor; the upper head is provided with an air duct; the lower head is provided with a refrigerant air outlet pipe and a refrigerant liquid inlet pipe; a cylindrical partition which has one end slidingly and sealingly connected to the lower tube sheet is provided in the cavity between the lower head and the lower tube sheet to separate the outer circle heat exchange tubes and the inner circle heat exchange tubes; the refrigerant liquid inlet pipe extends into the lower head and is connected to the orifice on the partition; the coolant inlet pipe and the coolant outlet pipe are respectively installed at the tangential positions of the cylinder close to the upper tube sheet and the lower tube sheet; the other end of the partition is welded and fixed to the inner wall of the closed end of the lower head.

2. The vertical rotary heat exchange tube evaporator according to claim 1, characterized in that: The coolant inlet pipe and the coolant outlet pipe are respectively connected to the outlet pipe and the inlet pipe for coolant circulation.

3. The vertical rotary heat exchange tube evaporator according to claim 1, characterized in that: The upper end cap and the cylinder are respectively fixed to the two ends of the upper connecting frame by welding, and the lower end cap and the cylinder are respectively fixed to the two ends of the lower connecting frame by welding.

4. The vertical rotary heat exchange tube evaporator according to claim 1, characterized in that: The air duct and the refrigerant air outlet pipe are connected to the air inlet pipe of the refrigeration compressor.

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