Flooded evaporator

Abstract

The utility model provides a flooded evaporator, which relates to the technical field of evaporators and comprises a barrel, a working medium inlet and outlet is arranged at the top end of the tail end of the barrel, a shell pass air outlet is arranged at the top end of the middle of the barrel, a shell pass liquid inlet is arranged at the bottom end of the middle of the barrel, and a support plate is arranged in the barrel. A heat exchange tube is arranged on the surface of the supporting plate, a heating tube bundle is arranged in the barrel, a baffle is arranged in the barrel, a wire mesh demister is arranged in the barrel, a liquid separator is arranged in the barrel, and a horizontal baffle is arranged to completely cover a short-circuit channel; meanwhile, the wire mesh demister is arranged, so that the gaseous working medium of a full evaporation interface can be sucked by the compressor only after flowing through the wire mesh demister, the occurrence rate of suction with liquid can be reduced, the volume of the flooded evaporator is promoted to be reduced, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporator technical field especially relates to a full -liquid type evaporator. BACKGROUND

[0002] Full -liquid type evaporator, the temperature of the working medium of the tube side is higher, from one side pipe box, flow through the inside of heat exchange pipe, the temperature of the working medium of the shell side is lower, from the bottom of shell side, is heated to boiling through the outside of heat exchange pipe, becomes gaseous from the gas outlet and is sucked by compressor, completes the heat exchange process;

[0003] Chinese patent publication No. CN210374181U discloses a full -liquid type evaporator, cylinder body, upper cavity and lower cavity, the upper cavity and the lower cavity are formed in the internal space of the cylinder body, wherein, the upper cavity and the lower cavity are arranged in upper and lower separation, and the upper cavity is communicated with the lower cavity, upper baffle member and lower baffle member, the upper baffle member separates the upper cavity into zigzag flow channel, the lower baffle member separates the lower cavity into zigzag flow channel, heat exchange pipe, the heat exchange pipe is arranged in the cylinder body, and the heat exchange pipe extends in the flow channel of the upper cavity and the flow channel of the lower cavity respectively, gas outlet and liquid inlet, the gas outlet is arranged on the upper of the cylinder body, the liquid inlet is arranged on the lower of the cylinder body, and the liquid inlet is communicated with the lower cavity, oil return port, the oil return port is communicated with the end of the flow channel of the upper cavity;

[0004] In this existing design, although the oil concentration is highest at the oil return port position, the accumulation of lubricating oil in the full -liquid type evaporator is reduced, and the heat exchange performance is improved, the evaporator gas outlet position is flexible, and the gas outlet does not have to be placed in the center, which is convenient for structure design, under the action of the baffle, the refrigerant maintains a certain flow rate, and fully exchanges heat with the heat exchange pipe, thereby improving the heat exchange performance, and the evaporator can provide an independent evaporator solution for a refrigeration system in the application of multiple compressors, but due to the limitation of site space or process demand, the inlet and outlet of the tube side of the traditional evaporator may adopt left and right distribution form, the inlet and outlet working medium in the tube box must be separated by a separation plate, in order to avoid the separation plate, a vertical gap is formed in the corresponding position of the heat exchange pipe bundle, forming a channel, which causes the shell side working medium outside the heat exchange pipe to flow out too fast, forming a "short circuit" phenomenon, at the same time, the high-speed operation of the compressor causes the suction pipeline flow rate to be very fast, and the working medium that has not been fully exchanged by the heat exchange pipe will be partially sucked into the compressor in the form of liquid droplets, causing liquid impact phenomenon, which seriously damages the function and service life of the compressor;

[0005] Therefore, a full -liquid type evaporator is designed to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at solving the technical problems in the above background.

[0007] The utility model discloses a following technical scheme: A flooded evaporator, including the cylinder, the top of the tail end of cylinder is provided with the working medium import and export, the top of cylinder middle part is provided with the shell side outlet, the bottom of cylinder middle part is provided with the shell side liquid inlet, the inside of cylinder is provided with the supporting plate, the surface of supporting plate is provided with the heat exchange pipe, the inside of cylinder is provided with the heating tube bundle, the inside of cylinder is provided with the baffle, the inside of cylinder is provided with the silk screen demister, the inside of cylinder is provided with the distributor.

[0008] As the utility model discloses a flooded evaporator preferably, the inside of cylinder is provided with the turbulence mechanism, the turbulence mechanism includes the mounting plate fixed in the tail end of cylinder, the surface fixed mounting of mounting plate is provided with motor, the output of motor is installed with the rotating shaft, the surface of rotating shaft is provided with spiral blade, one end of rotating shaft is rotatably connected with the rotating seat.

[0009] As the utility model discloses a flooded evaporator preferably, the rotating seat is fixed in the inside of cylinder front end, and the rotating shaft is located at the transverse center of cylinder.

[0010] As the utility model discloses a flooded evaporator preferably, the shell side outlet is connected with the compressor, and the shell side outlet is located directly above the silk screen demister.

[0011] As the utility model discloses a flooded evaporator preferably, the baffle is located above the heating tube bundle, and the distributor is located below the baffle.

[0012] As the utility model discloses a flooded evaporator preferably, the silk screen demister is composed of the fine silk screen of stainless steel material, and the silk screen demister is located above the baffle.

[0013] As the utility model discloses a flooded evaporator preferably, the heat exchange pipe is a multilayer structure, and baffles are arranged between each layer of heat exchange pipe.

[0014] Compared with the prior art, the utility model has the advantages and positive effects that,

[0015] 1. The utility model discloses a horizontal baffle is set up above heating tube bundle, and the short circuit channel is completely covered, makes the splashing droplet not to be too fast to approach shell -side outlet, increases the contact time of working medium and heat exchange pipe, simultaneously, the wire mesh demister is set up horizontally above the baffle, and the gaseous working medium of full evaporation interface must flow through the wire mesh demister to be inhaled by compressor, the gas flow rate is lower at this place relative to shell -side outlet, under the high -efficient effect range of wire mesh demilter (wire mesh demilter usually is made of the fine wire screen of stainless steel material, can reduce the small droplet of low -speed gas existence reference standard HG / T21618-1998), can reduce the occurrence rate of suction liquid, promotes the reduction of full -liquid type evaporator volume, saves the cost.

[0016] 2. The utility model discloses set up the mechanism of disturbing flow, can destroy the laminar state of fluid, increase the turbulence degree to improve the heat exchange efficiency, further increase the uniform distribution of lubricating oil simultaneously and reduce its accumulation in local area. DRAWINGS

[0017] Figure 1 A schematic view of a full -liquid type evaporator is provided for the utility model;

[0018] Figure 2 A side view of a full -liquid type evaporator is provided for the utility model;

[0019] Figure 3 A schematic view of the mechanism of disturbing flow of a full -liquid type evaporator is provided for the utility model;

[0020] Figure 4 A cross section view of the heat exchange pipe of a full -liquid type evaporator is provided for the utility model.

[0021] LEGEND:

[0022] 1, cylinder body;2, working medium inlet and outlet;3, shell -side outlet;4, shell -side liquid inlet;5, support plate;6, heat exchange pipe;

[0023] 7, mechanism of disturbing flow;701, mounting plate;702, motor;703, rotating shaft;704, spiral blade;705, rotating seat;

[0024] 8, heating tube bundle;9, baffle;10, wire mesh demister;11, baffle;12, distributor. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above -mentioned purpose, features and advantages of the utility model, the utility model is further explained below combining with the drawings and examples. It needs to be explained that the embodiment of the application and the features in the embodiment can be combined mutually in the case of no conflict.

[0026] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that can not be described in detail herein, and the present application is not limited to the specific embodiments described herein.

[0027] Embodiment

[0028] Please refer to Figures 1-4 The present application provides a technical scheme: a flooded evaporator, comprising a cylinder 1, which is the main structure of the flooded evaporator, used to contain the working medium and perform heat exchange, the top end of the tail end of the cylinder 1 is provided with a working medium inlet and outlet 2 to introduce and discharge the working medium, the top end of the middle part of the cylinder 1 is provided with a shell side gas outlet 3, which is connected with a compressor, the shell side gas outlet 3 is located directly above a wire mesh demister 10 to discharge the gas generated in the evaporation process, the bottom end of the middle part of the cylinder 1 is provided with a shell side liquid inlet 4 to introduce the liquid to be evaporated, the inside of the cylinder 1 is provided with a support plate 5 to support heat exchange pipes 6, the surface of the support plate 5 is provided with the heat exchange pipes 6, the heat exchange pipes 6 are used to increase the heat exchange area and improve the heat efficiency, the heat exchange pipes 6 are of a multi-layer structure, and baffles 11 are arranged between each layer of the heat exchange pipes 6, the multi-layer heat exchange pipes 6 can increase the heat exchange area, thereby improving the heat exchange efficiency while maintaining the compactness of the structure, the inside of the cylinder 1 is provided with a heating tube bundle 8 to provide additional heat to promote the evaporation process, the inside of the cylinder 1 is provided with a baffle 9 to cover the short circuit channel, so that the splashed droplets cannot approach the shell side gas outlet 3 too quickly, the contact time of the working medium and the heat exchange pipes 6 is increased, thereby improving the efficiency, the baffle 9 is located above the heating tube bundle 8, a distributor 12 is located below the baffle 9, the inside of the cylinder 1 is provided with the wire mesh demister 10, so that the gaseous working medium of the full evaporation interface must flow through the wire mesh demister 10 before being sucked into the compressor, which can reduce the probability of liquid entrainment in suction, promote the reduction of the volume of the flooded evaporator, and save the cost, the wire mesh demister 10 is composed of a fine wire mesh of stainless steel material, the wire mesh demister 10 is located above the baffle 9, and the inside of the cylinder 1 is provided with the distributor 12.

[0029] The inside of the cylinder 1 is provided with a flow disturbing mechanism 7, the flow disturbing mechanism 7 comprises a mounting plate 701 fixed at the tail end of the cylinder 1, a motor 702 is fixedly installed on the surface of the mounting plate 701, a rotating shaft 703 is installed at the output end of the motor 702, helical blades 704 are arranged on the surface of the rotating shaft 703, and a rotating seat 705 is rotatably connected to one end of the rotating shaft 703 and fixed to the inside of the front end of the cylinder 1, the rotating shaft 703 is located at the transverse center of the cylinder 1, so as to facilitate the destruction of the laminar flow state of the fluid, increase the degree of turbulence, and thereby improve the heat exchange efficiency.

[0030] Working principle: in use, when the working medium from the working medium import and export 2 into the cylinder 1, in the cylinder 1 is heated by the tube bundle 8 and heat exchange tube 6 provided by the heat, begin to evaporate and form steam, at the same time, start the motor 702, the motor 702 drive rotating shaft 703 rotation, rotating shaft 703 in turn drive spiral blade 704 to flow for scattering, destroy the flow state of fluid, thereby improving the heat exchange efficiency, at this time, the generated steam rises, through the shelter of baffle 9, increase the working medium and heat exchange tube 6 contact time, at the same time in the process of steam rising, steam not only through baffle 9, also through the wire mesh demister 10 set above the baffle 9, make gaseous working medium through wire mesh demister 10 after discharge shell course gas outlet 3, and be sucked into the compressor, reduce the probability of suction liquid, promote the full liquid evaporator volume reduction, save the cost.

[0031] The above is only the preferred embodiment of the present application, not the other forms of the present application for other restrictions, any skilled in the art of the technical personnel may use the above disclosed technical content to change or modification as equivalent to the equivalent embodiments applied to other fields, but all the above embodiments are not deviated from the technical scheme of the present application, according to the technical essence of the present application to the above examples of any simple modification, equivalent changes and modification, still belongs to the present application technical scheme of the protection scope.

Claims

1. A flooded evaporator comprising a cylinder (1), characterised in that: The top end of the tail end of the cylinder (1) is provided with a working medium inlet and outlet (2), the top end of the middle of the cylinder (1) is provided with a shell side gas outlet (3), the bottom end of the middle of the cylinder (1) is provided with a shell side liquid inlet (4), the inside of the cylinder (1) is provided with a support plate (5), the surface of the support plate (5) is provided with a heat exchange pipe (6), the inside of the cylinder (1) is provided with a heating pipe bundle (8), the inside of the cylinder (1) is provided with a baffle (9), the inside of the cylinder (1) is provided with a wire mesh demister (10), and the inside of the cylinder (1) is provided with a distributor (12).

2. The flooded evaporator of claim 1, wherein: The inside of the cylinder (1) is provided with a turbulence mechanism (7), the turbulence mechanism (7) comprises a mounting plate (701) fixed at the tail end of the cylinder (1), a motor (702) is fixedly installed on the surface of the mounting plate (701), a rotating shaft (703) is installed at the output end of the motor (702), helical blades (704) are arranged on the surface of the rotating shaft (703), and a rotating seat (705) is rotatably connected to one end of the rotating shaft (703).

3. The flooded evaporator of claim 2, wherein: The rotating seat (705) is fixed in the inside of the front end of the cylinder (1), and the rotating shaft (703) is located at the transverse center of the cylinder (1).

4. The flooded evaporator of claim 3, wherein: The shell side gas outlet (3) is connected with a compressor, and the shell side gas outlet (3) is located directly above the wire mesh demister (10).

5. The flooded evaporator of claim 4, wherein: The baffle (9) is located above the heating pipe bundle (8), and the distributor (12) is located below the baffle (9).

6. The flooded evaporator of claim 5, wherein: The wire mesh demister (10) is composed of a fine wire mesh made of stainless steel, and the wire mesh demister (10) is located above the baffle (9).

7. The flooded evaporator of claim 6, wherein: The heat exchange pipe (6) is a multi-layer structure, and a baffle (11) is arranged between each layer of the heat exchange pipe (6).

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