Tube-in-tube evaporator with shunting and air entraining functions

Abstract

The utility model relates to a double-pipe evaporator with shunting and air entraining functions, which belongs to the field of refrigeration equipment and comprises an outer pipe, an inner pipe, a first inlet pipe, a first outlet pipe, a second inlet pipe and a second outlet pipe, and the top end of the second inlet pipe is provided with a filter structure and a mounting structure for fixing the filter structure; the filtering structure comprises a filtering pipe, a filtering plate and an oil absorbing plate; the filtering plate and the oil absorbing plate are detachably mounted in the filtering pipe and are distributed on the filtering pipe; the mounting structure comprises a mounting sleeve, a mounting shell fixedly mounted outside the mounting sleeve, a first spring, a second spring and a rotating wheel which are arranged inside the mounting shell, and a connecting rod which is fixedly mounted at one end of the first spring and extends to the outside of the mounting shell. According to the double-pipe evaporator with the flow dividing and air entraining functions, the filter pipe can be rapidly disassembled and assembled through the installation structure, the situation that mechanical fatigue is prone to occurring after long-time use is avoided, operation of workers is facilitated, the structure is simple, and therefore the advantages of being high in practicability, convenient to install and the like are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a sleeve-type evaporator with split-flow air extraction. Background Art

[0002] The shell-and-tube evaporator is one of the most commonly used evaporators in the refrigeration system. The main structure of the shell-and-tube evaporator is that one or several small-diameter copper tubes are inserted into a large metal tube, and the inner diameters of the large and small tubes are divided into two unconnected spaces, and two joints are welded near the outer wall of the two ends of the large tube. The shell-and-tube evaporator has high flow velocity, high heat release coefficient, and compact structure, and is suitable for small-capacity chillers. However, when the medium in the shell-and-tube evaporator tube contains certain impurities or corrosiveness, it is easy to cause corrosion in the tube after a long period of use, which greatly affects the heat exchange efficiency.

[0003] After searching, Chinese patent CN206235206U discloses a sleeve-type evaporator, including a tube side and a shell side, a tube side inlet is provided at one end of the tube side, a tube side outlet is provided at the other end of the tube side, a shell side inlet is provided at one end of the shell side, a shell side outlet is provided at the other end of the shell side, the medium flowing in the tube side is a refrigerant, the medium flowing in the shell side is compressed air, an anti-corrosion layer is provided on the outer wall of the tube side, a filter device is provided at the shell side inlet, the filter device includes a first filter plate and a second filter plate, a cavity is provided between the first filter plate and the second filter plate, and a plurality of oil absorption plates are provided in the cavity. The setting of the filter device can further process the compressed air to prevent corrosion to the evaporator caused by long-term use.

[0004] The utility model sleeve-type evaporator disassembles and assembles the filter device by means of threads. However, during long-term use, the threaded connection will cause stress concentration and stress changes due to repeated loading and unloading, resulting in fatigue failure at the threaded connection, which will lead to fracture. The impact during water inflow will cause the filter structure to shift. Therefore, a sleeve-type evaporator with split-flow air entrainment is proposed to solve the above-mentioned problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a sleeve-type evaporator with split-flow air entrainment, which has the advantages of strong practicality and easy installation, and solves the problem of fatigue failure of threaded connections due to stress concentration and stress changes caused by repeated loading and unloading during long-term use.

[0006] To achieve the above object, the utility model provides the following technical solution: a sleeve-type evaporator with split-flow bleed air, comprising an outer tube, an inner tube, a first inlet tube, a first outlet tube, a second inlet tube and a second outlet tube, wherein a filter structure and a mounting structure for fixing the filter structure are provided at the top end of the second inlet tube;

[0007] The filtering structure comprises a filtering tube, a filter plate and an oil absorption plate which are detachably installed inside the filtering tube and distributed on the filter plate;

[0008] The mounting structure includes a mounting sleeve, a mounting shell fixedly mounted on the outside of the mounting sleeve, a first spring, a second spring and a rotating wheel arranged inside the mounting shell, a connecting rod fixedly mounted on one end of the first spring and extending to the outside of the mounting shell, an insertion rod fixedly mounted on one end of the second spring, and a pull rope fixedly mounted between the insertion rod and the connecting rod and wrapped around the outer surface of the rotating wheel.

[0009] Furthermore, a mounting groove is provided inside the mounting shell, the bottom end of the filter tube extends to the inside of the mounting sleeve and is fixed thereto, and a socket for inserting a rod is installed outside the second inlet pipe.

[0010] Furthermore, the side of the first spring away from the connecting rod is fixed to the inner wall of the mounting groove, the rotating wheel is installed inside the mounting groove through a bearing, a mounting seat fixed to the other end of the second spring is fixed on the top wall of the mounting groove, and the pull rope runs through the inside of the mounting seat.

[0011] Furthermore, the connecting rod and the inserting rod are both L-shaped in appearance, one end of the connecting rod away from the first spring extends to the outside of the mounting shell, and a handle block is installed at the end of the connecting rod.

[0012] Furthermore, the interiors of the installation sleeve and the installation shell are both provided with through holes, and the insertion rod extends into the interior of the installation sleeve through the through holes.

[0013] Furthermore, the installation sleeve is sleeved on the outside of the second inlet pipe, and the bottom end of the filter tube abuts against the top end of the second inlet pipe.

[0014] Furthermore, an air collecting pipe is arranged outside the outer pipe, and an air duct is fixedly connected between the outer pipe and the air collecting pipe.

[0015] Compared with the prior art, the utility model provides a shell-and-tube evaporator with split-flow air extraction, which has the following beneficial effects:

[0016] 1. The sleeve-type evaporator with split air flow can quickly disassemble and assemble the filter tube through the use of the installation structure, which not only avoids the mechanical fatigue after long-term use, but also facilitates the operation of the staff. The structure is simple, thus achieving the advantages of strong practicality and easy installation. It solves the problem of fatigue failure of the threaded connection due to stress concentration and stress changes caused by repeated loading and unloading during long-term use.

[0017] 2. In the shell-and-tube evaporator with split air bleed, the chilled water enters the inner tube from the first inlet tube, exchanges heat with the refrigerant liquid flowing between the inner and outer tubes to release heat and after the temperature drops, it flows out from the first outlet tube and enters the surface cooler of the air-conditioning system to provide a cold source for the cold space; the gas formed in the outer tube is split and bleed into the gas collecting pipe through the bleed pipe, and enters the refrigeration compressor together with the gas finally formed between the inner and outer tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 2 This is a structural cross-sectional view of the filter tube of the utility model;

[0020] Figure 3 This is a structural cross-sectional view of the mounting seat of the utility model;

[0021] Figure 4 For this utility model Figure 2 A is a schematic diagram of the enlarged structure shown;

[0022] Figure 5 It is a structural stereogram of the filter tube of the utility model.

[0023] In the figure: 1, outer tube; 2, inner tube; 3, first inlet tube; 4, first outlet tube; 5, second inlet tube; 6, second outlet tube; 7, air duct; 8, air collecting tube; 9, filter tube; 10, filter plate; 11, oil absorption plate; 12, mounting sleeve; 13, mounting shell; 14, mounting groove; 15, first spring; 16, connecting rod; 17, rotating wheel; 18, plug rod; 19, pull rope; 20, mounting seat; 21, second spring; 22, handle block; 23, pulley; 24, slide groove; 25, perforation; 26, socket. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 A sleeve-type evaporator with split air bleed includes an outer tube 1, an inner tube 2, a first inlet tube 3, a first outlet tube 4, a second inlet tube 5 and a second outlet tube 6. A filtering structure and a mounting structure for fixing the filtering structure are arranged at the top of the second inlet tube 5; an air collecting pipe 8 is arranged outside the outer tube 1, and an air bleed pipe 7 is fixedly connected between the outer tube 1 and the air collecting pipe 8.

[0026] It should be noted that the number of air ducts 7 is determined according to the number of turns of the outer tube 1, so that the number of air ducts 7 can be multiple, so as to cooperate with the gas collecting pipe 8 to timely divert and lead out the gas formed by the evaporation of the liquid.

[0027] The filtering structure includes a filter tube 9, a filter plate 10 and an oil absorption plate 11 which are detachably installed inside and distributed on the filter tube 9; there are two filter plates 10. The two filter plates 10 play a role of secondary filtering, and the impurity oil in the compressed air is absorbed by the oil absorption plate 11, thereby ensuring that the compressed air entering the inner tube 2 is further purified. The filter tube 9 is connected up and down.

[0028] Among them, the installation structure includes an installation sleeve 12, a installation shell 13 fixedly installed on the outside of the installation sleeve 12, a first spring 15, a second spring 21 and a rotating wheel 17 arranged inside the installation shell 13, a connecting rod 16 fixedly installed on one end of the first spring 15 and extending to the outside of the installation shell 13, an insertion rod 18 fixedly installed on one end of the second spring 21, and a pull rope 19 fixedly installed between the insertion rod 18 and the connecting rod 16 and wrapped around the outer surface of the rotating wheel 17.

[0029] In this embodiment, a mounting groove 14 is provided inside the mounting shell 13, the bottom end of the filter tube 9 extends to the inside of the mounting sleeve 12 and is fixed thereto, and a socket 26 for plugging the plug rod 18 is installed outside the second inlet pipe 5. The first spring 15 is fixed to the inner wall of the mounting groove 14 on one side away from the connecting rod 16, the rotating wheel 17 is installed inside the mounting groove 14 through a bearing, a mounting seat 20 fixed to the other end of the second spring 21 is fixed on the inner top wall of the mounting groove 14, and the pull rope 19 passes through the inside of the mounting seat 20.

[0030] It should be noted that the connecting rod 16 and the plug rod 18 are both L-shaped, and one end of the connecting rod 16 away from the first spring 15 extends to the outside of the mounting shell 13, and a handle block 22 is installed at the end of the connecting rod 16. The cross sections of the connecting rod 16 and the plug rod 18 are against each other to form a hook connection.

[0031] In this embodiment, a through hole 25 is formed inside the installation sleeve 12 and the installation shell 13 , and the insertion rod 18 extends through the through hole 25 to the inside of the installation sleeve 12 .

[0032] The mounting sleeve 12 is sleeved on the outside of the second inlet pipe 5 , and the bottom end of the filter tube 9 abuts against the top end of the second inlet pipe 5 .

[0033] The working principle of the above embodiment is:

[0034] When in use, the connecting rod 16 is pushed inward, the connecting rod 15 extends into the mounting shell 13, and the insertion rod 18 is driven to extend into the mounting shell 13 through the pull rope 19 and the rotating wheel 17. Then the mounting sleeve 12 is sleeved on the top of the second inlet pipe 5. At this time, the filter tube 9 and the second inlet pipe 5 are abutted, and the two filter plates 10 play a role of secondary filtration. The impurity oil in the compressed air is adsorbed by the oil absorption plate 11, thereby ensuring that the compressed air entering the inner tube 2 is further purified.

[0035] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the utility model is controlled by the controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power supply is also common knowledge in this field. The utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and circuit connection in detail.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-tube evaporator with split-flow bleed air, comprising an outer tube (1), an inner tube (2), a first inlet tube (3), a first outlet tube (4), a second inlet tube (5) and a second outlet tube (6), characterized in that: The top end of the second inlet pipe (5) is provided with a filtering structure and a mounting structure for fixing the filtering structure; The filtering structure comprises a filtering tube (9), a filtering plate (10) and an oil absorption plate (11) which are detachably mounted inside and distributed on the filtering tube (9); The mounting structure comprises a mounting sleeve (12), a mounting shell (13) fixedly mounted on the outside of the mounting sleeve (12), a first spring (15) arranged inside the mounting shell (13), a second spring (21) and a rotating wheel (17), a connecting rod (16) fixedly mounted on one end of the first spring (15) and extending to the outside of the mounting shell (13), an insertion rod (18) fixedly mounted on one end of the second spring (21), and a pull rope (19) fixedly mounted between the insertion rod (18) and the connecting rod (16) and wound around the outer surface of the rotating wheel (17).

2. A double-tube evaporator with split-flow bleed air according to claim 1, characterized in that: The interior of the installation shell (13) is provided with an installation groove (14), the bottom end of the filter tube (9) extends to the interior of the installation sleeve (12) and is fixed thereto, and the exterior of the second inlet pipe (5) is provided with a socket (26) for plugging in the plug rod (18).

3. A double-tube evaporator with split-flow bleed air according to claim 2, characterized in that: The side of the first spring (15) away from the connecting rod (16) is fixed to the inner wall of the mounting groove (14); the rotating wheel (17) is installed inside the mounting groove (14) through a bearing; a mounting seat (20) fixed to the other end of the second spring (21) is fixed on the inner top wall of the mounting groove (14); and the pull rope (19) passes through the interior of the mounting seat (20).

4. A double-tube evaporator with split-flow bleed air according to claim 1, characterized in that: The connecting rod (16) and the inserting rod (18) are both L-shaped in appearance. One end of the connecting rod (16) away from the first spring (15) extends to the outside of the mounting shell (13), and a handle block (22) is installed at the end of the connecting rod (16).

5. The double-tube evaporator with split-flow bleed air according to claim 1, characterized in that: The interiors of the installation sleeve (12) and the installation shell (13) are both provided with through holes (25), and the insertion rod (18) extends through the through holes (25) to the interior of the installation sleeve (12).

6. A double-tube evaporator with split-flow bleed air according to claim 1, characterized in that: The installation sleeve (12) is sleeved on the outside of the second inlet pipe (5), and the bottom end of the filter tube (9) abuts against the top end of the second inlet pipe (5).

7. The double-tube evaporator with split-flow bleed air according to claim 1, characterized in that: An air collecting pipe (8) is arranged outside the outer pipe (1), and an air duct (7) is fixedly connected between the outer pipe (1) and the air collecting pipe (8).

Images