CN101446459B - Flexible fluid-directing double-spiral-sleeve type heat exchanger - Google Patents

Abstract

The invention relates to a flexible fluid-directing double-spiral-sleeve type heat exchanger which comprises a compressor, a condenser, an evaporator and a collecting barrel; the structures of the condenser and the evaporator comprise tube sleeves and thin heat exchanging pipes; the outer wall of each thin heat exchanging pipe is provided with flexible fluid directors at intervals,and the condensers and the evaporators are respectively communicated with the compressor by the heat exchanger; the heat exchanger comprises an outer sleeve barrel, an upper exhaust port, a lower exhaust port, an evaporator connecting port, a compressor connecting port, and an inner heat exchanging pipe; the invention causes that the cooling water and a refrigerant to run in a reverse spiral mode so as to improve the coefficient of heat exchanging; the existence of flexible fluid director further intensifies the heat exchanging efficiency of the heat exchanger; the energy efficiency ratio (EER) of the invention is more than or equal to 5.66, coefficient of performance (COP) is more than or equal to 4.8, coefficient of heat transfer (K) is more than or equal to 2000W/M <2> DEG C, capacity of heat extraction ranges from 1KW to 400KW, refrigerating output is increased by about 30 percent compared with the prior art, while the materials used for the heat exchanging pipe is reduced about 20 percent, and effects of saving energy and reducing consumption are obvious. Therefore, the invention achieves the requirements and aims of saving energy, increasing efficiency and reducing power consumption.

Description

A flexible diversion double helix casing heat exchanger

technical field

The invention relates to a sleeve-type heat exchanger, in particular to a sleeve-type heat exchanger that can be used in small, medium and large-scale water source heat pumps and water-cooled chillers, specifically a flexible flow-guiding double-helix sleeve-type heat exchanger device.

Background technique

The structure of the existing casing heat exchanger includes a compressor, a spiral casing condenser whose inlet is connected with the compressor, and a spiral casing evaporator connected with the compressor and having a gas collecting bucket at the end. , the collecting barrel connected with the end of the spiral casing condenser; the collecting barrel is connected with the spiral casing evaporator through the liquid separator; the structures of the spiral casing condenser and the spiral casing evaporator are both It includes a pipe sleeve and several thin heat exchange tubes that are sheathed in the pipe sleeve. The so-called sleeve type means that there are several thin heat exchange tubes in the sleeve, that is, the sleeve in the tube. The inlet of the helical casing condenser is directly connected with the compressor through a communication pipe. The collecting bucket is directly set at the end of the spiral sleeve condenser. The gas collecting barrel of the spiral casing evaporator communicates with the compressor through a vapor-liquid separator. The casing heat exchanger of this structure can only be applied to small units, and the energy efficiency ratio (EER) ≤ 4.6, the coefficient of performance (COP) ≤ 4.05, and the heat transfer coefficient (K) under the optimal working condition within the framework of the national standard ≤1100W/M ² .℃, heat removal capacity is 1-180KW. Moreover, there are many heat exchange tube consumables. Therefore, no matter in terms of working effect or energy saving and consumption reduction, the sleeve-pipe heat exchanger with this structure cannot meet people's increasing requirements for energy saving, efficiency increase and consumption reduction.

Contents of the invention

In order to solve the above-mentioned defects of the existing sleeve-type heat exchanger, the present invention provides a sleeve-type heat exchanger that is more energy-saving, efficiency-enhancing, and consumption-reducing, that is, a flexible flow-guiding double-helix sleeve-type heat exchanger .

The present invention adopts the following technical scheme to achieve the above object: a flexible diversion double helical casing heat exchanger, including a compressor, a spiral casing condenser whose inlet is connected to the compressor, and a spiral casing condenser connected to the compressor. , the spiral casing evaporator with a gas collecting barrel at the end, and the collecting barrel connected with the end of the spiral casing condenser; the collecting barrel is connected with the spiral casing evaporator through a liquid separator; The structures of both the tube-shaped condenser and the spiral-tube evaporator include tube sleeves and several thin heat exchange tubes that go through the tube sleeves; the outer walls of the thin heat exchange tubes are provided with flexible flow guides at intervals, Both the tube condenser and the helical casing evaporator communicate with the compressor through a heat exchanger; the structure of the heat exchanger includes: an outer casing, an upper exhaust port on the top of the outer casing, and a lower exhaust outlet on the bottom of the outer casing , the evaporator connection port at the bottom of the jacket drum, the compressor connection port on the side wall of the jacket drum, the inner heat exchange tubes located inside the jacket drum and connected to the evaporator connection port and the compressor connection port at the same time; the upper row The air port is connected with the exhaust port of the compressor through the connecting pipe, the lower exhaust port is connected with the inlet of the condenser through the connecting pipe, the connecting port of the evaporator is connected with the gas collecting barrel through the connecting pipe, and the connecting port of the compressor is connected through the connecting pipe. The pipe communicates with the suction port of the compressor. The flexible deflector is a ring made of hard or soft materials, such as copper rings, nylon rings, etc.

The present invention breaks through the traditional technical bottleneck, and makes the brine and refrigerant flowing through the heat exchanger flow in a reverse spiral shape, which is the meaning of the double helix in the present invention. The double helix flow can make the refrigerant flow in the tube and the brine flow outside the tube to form multiple circulations to generate centrifugal force, which can destroy the resistance of the inner wall of the heat transfer tube, absolutely limit the thickening of the liquid film, and improve heat transfer Coefficient, and expand the heat exchange area, further improve the heat exchange efficiency, the existence of the flexible flow deflector strengthens the heat exchange efficiency of the heat exchanger, and the word flexibility is used to explain that due to the Existence, the fluid flowing through the flexible deflector is like a graceful girl twisting her beautiful waist and hips and dancing. The invention adopts a heat exchanger to replace the traditional gas-liquid separator, which not only increases the superheat degree of the low-pressure gas entering the compressor, but also improves the dryness of the low-pressure gas, thus effectively preventing the compressor from liquid hammering and reducing the The suction resistance of the compressor increases the evaporation temperature and increases the cooling capacity. Therefore, the present invention integrates fluid dynamics, heat transfer, thermodynamics, and aesthetics, and provides a very valuable application example for the development of these subjects. After application testing, within the framework of the national standard, the energy efficiency ratio (EER) of the present invention is ≥ 5.66, the coefficient of performance (COP) is ≥ 4.8, the heat transfer coefficient (K) is ≥ 2000W/M ² .℃, and the heat removal capacity is 1-400KW. Compared with the prior art, the energy consumption is increased by about 30%, while the materials used for the heat exchange tubes are reduced by about 20%, so the effect of energy saving and consumption reduction is very obvious. Therefore, the requirements and goals of energy saving, efficiency enhancement and consumption reduction are achieved.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the schematic diagram of subcooler structure;

Detailed ways

A flexible diversion double helix casing heat exchanger, including a compressor 1, a spiral casing condenser 2 with an inlet 16 connected to the compressor 1, and a gas collector at the end connected to the compressor 1 The spiral casing evaporator 4 of the barrel 3, the collecting barrel 5 connected with the end of the spiral casing condenser 2; the collecting barrel 5 communicates with the spiral casing evaporator 4 through a liquid separator 6; The structures of the tube-shaped condenser 2 and the spiral-tube evaporator 4 both include tube sleeves, and several thin heat exchange tubes 7 that are sheathed in the tube sleeves; the outer walls of the thin heat exchange tubes 7 are provided with flexible flow guides at intervals 8. Both the spiral sleeve condenser 2 and the spiral sleeve evaporator 4 communicate with the compressor 1 through a heat exchanger; the heat exchanger structure includes: an outer casing 9, and an upper exhaust port 10 on the top of the outer casing 9 , the lower exhaust port 11 located at the bottom of the outer sleeve 9, the evaporator connection port 12 located at the bottom of the outer sleeve 9, the compressor connection port 13 located on the side wall of the outer sleeve 9, located inside the outer sleeve 9 and connected to the evaporation The inner heat exchange tube 14 that connects with the compressor connection port 12 and the compressor connection port 13 at the same time; The inlet 16 of the evaporator is connected, the connecting port 12 of the evaporator is connected with the gas collecting bucket 3 through the connecting pipe 15 , and the connecting port 13 of the compressor is connected with the suction port of the compressor 1 through the connecting pipe 15 . The flexible deflector is a ring made of hard or soft materials, such as copper rings, nylon rings, etc.

The thin heat exchange tubes 7 are distributed in a curved shape in the tube casing,

The above-mentioned "distributed in a curved shape" refers to any form other than a straight line that can make the fluid in the thin heat exchange tube 7 travel non-linearly, such as a sine (cosine) curve, a helix, and the like.

The flexible deflectors 8 arranged at intervals on the outer walls of the thin heat exchange tubes 7 are distributed in a sine (cosine) curve or a helix in space.

In order to further improve the heat exchange efficiency of the present invention, a subcooler can be set at the end of the spiral sleeve condenser 2, and a collecting bucket 5 is set at the other end of the subcooler, that is to say, a collecting bucket 5 and the end of the spiral sleeve condenser 2 are connected through a subcooler. The structure of the subcooler includes a refrigerant inlet pipe 17 at the upper right end, a refrigerant outlet pipe 18 at the left end of the lower part, and a refrigerant outlet pipe 18 at the right end of the lower part. The tube barrel of the collecting barrel connection port 19 is arranged in the upper partition 20 with a round hole in the middle of the brine inlet pipe 17, and the lower partition is arranged in the brine outlet pipe 18 and has a round hole in the middle. Plate 21, the upper main pipe 22 arranged under the round hole of the upper partition 20 and sealed with the round hole, the lower main pipe 23 arranged above the round hole of the lower partition 21 and connected with the round hole sealed, several are arranged on the upper Between the main pipe 22 and the lower main pipe 23, and communicated with the upper main pipe 22 and the lower main pipe 23, the outer wall is provided with threaded threaded heat exchange tubes 24; The brine inlet pipe 17 communicates with the external brine supply pipe, and the brine outlet pipe 18 communicates with the end of the spiral sleeve condenser 2 .

The number of the threaded heat exchange tubes 24 is three.

The existence of the subcooler further improves the heat exchange efficiency of the present invention.

The compressor may be a flexible scroll compressor, a screw compressor, a semi-hermetic piston compressor, and the like.

Claims (5)

1. a kind of flexible conduction double-helical casing heat exchanger, comprises compressor (1), and the helical casing condenser (2) that inlet (16) is connected with compressor (1), and compressor ( 1) A helical casing evaporator (4) connected with a gas collecting barrel (3) at the end, and a collecting barrel (5) connected to the end of the spiral casing condenser (2); The flow bucket (5) communicates with the spiral casing evaporator (4) through the liquid separator (6); the structures of the spiral casing condenser (2) and the spiral casing evaporator (4) both include a tube casing , and several thin heat exchange tubes (7) that are sheathed in the pipe sleeve; it is characterized in that: the outer wall of the thin heat exchange tubes (7) is provided with flexible deflectors (8) at intervals, and the spiral sleeve condenser (2 ) and the spiral casing evaporator (4) are all communicated with the compressor (1) through a heat exchanger; the heat exchanger structure includes: an outer casing (9), an upper exhaust port ( 10), the lower exhaust port (11) located at the bottom of the outer barrel (9), the evaporator connection port (12) located at the bottom of the outer barrel (9), and the compressor connection located on the side wall of the outer barrel (9) Port (13), the inner heat exchange tube (14) which is located inside the outer casing (9) and communicates with the evaporator connection port (12) and the compressor connection port (13) simultaneously; the upper exhaust port (10) communicates with The pipe (15) is connected with the exhaust port of the compressor (1), the lower exhaust port (11) is connected with the inlet (16) of the condenser through the connecting pipe (15), and the connecting port of the evaporator (12) is connected with the The pipe (15) is in communication with the gas collecting barrel (3), and the compressor connecting port (13) is in communication with the suction port of the compressor (1) through the communication pipe (15). 2. The flexible flow-guiding double-helix casing heat exchanger according to claim 1, characterized in that: the thin heat exchange tubes (7) are distributed in a curved shape in the tube casing. 3. According to claim 1 or 2, the flexible flow-guiding double-helix casing heat exchanger is characterized in that: the flexible flow guides (8) arranged at intervals on the outer walls of the thin heat exchange tubes (7) are sinusoidal in space distributed. 4. The flexible diversion double helix casing heat exchanger according to claim 1 or 2, characterized in that: the end of the collecting barrel (5) and the spiral casing condenser (2) are connected through a subcooler Generally speaking, the structure of the subcooler includes a tube barrel with a brine inlet pipe (17) at the right end of the upper part, a brine outlet pipe (18) at the left end of the lower part, and a collecting barrel connection port (19) at the right end of the lower part. An upper partition (20) with a round hole in the middle of the brine inlet pipe (17), a lower partition (21) with a round hole in the middle of the brine outlet pipe (18), The upper main pipe (22) arranged under the round hole of the upper partition (20) and sealed and connected with the round hole, and the lower main pipe (23) arranged above the round hole of the lower partition (21) and sealed and connected with the round hole, Several threaded heat exchange tubes (24) with threads on the outer wall are arranged between the upper header (22) and the lower header (23) and communicate with the upper header (22) and the lower header (23); The connecting port (19) is connected with the collecting barrel (5); the brine inlet pipe (17) is connected with the external brine supply pipe, and the brine outlet pipe (18) is connected with the spiral sleeve condenser (2) Connected ends. 5. The flexible flow-guiding double-helix casing heat exchanger according to claim 4, characterized in that: the number of threaded heat exchange tubes (24) is three. the

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