Liquid carrying prevention structure and flooded evaporator

Abstract

The utility model discloses a liquid carrying prevention structure and a flooded evaporator. The liquid carrying prevention structure comprises at least one layer of baffle arranged above the liquid level of a refrigerant. The multi-stage filter screen is vertically arranged between the baffle and the upper cylinder wall; the filter screens are arranged in parallel and are symmetrically arranged by horizontally extending towards the two sides by taking the refrigerating gas outlet in the middle as the center, at least three stages of filter screens are arranged on each side, and the pore diameters of the filter screens are sequentially increased from the center to the two sides. The flooded evaporator comprises the liquid carrying prevention structure. Through simple structural improvement, gas-liquid mixture in the flooded evaporator is subjected to a series of step-by-step separation, and the content of gas and liquid finally reaching the gas outlet is very low, so that the problem of liquid carrying in the working process of the evaporator is solved, the liquid is prevented from flowing back to the compressor to influence the performance of the compressor, and the service life of the compressor is prolonged. And the problem that the refrigerant of the evaporator is consumed too fast is solved, so that the working efficiency of the evaporator is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporator field especially a kind of anti-liquid-carrying structure and full-liquid evaporator. BACKGROUND

[0002] Full-liquid evaporator works, cold water passes in heat exchange pipe, refrigerant completely immerges heat exchange pipe, absorbs heat and evaporates outside heat exchange pipe.Refrigerant evaporates and is discharged via upper air outlet, and gas bubble after gasification is inevitably liquid-carrying when discharging, and liquid drop produced by the breakage of bubble at liquid level is carried by evaporated gas to form gas-liquid two-phase flow and enter compressor, thereby forming liquid knock on compressor, greatly shorten the service life of compressor and influence compressor reliability, in addition, liquid-carrying also reduces evaporator efficiency.

[0003] Therefore, aiming at the liquid-carrying influence problem produced when evaporated refrigerant bubble rises, a kind of anti-liquid-carrying structure designed for full-liquid evaporator is worth studying. SUMMARY

[0004] The utility model discloses a kind of anti-liquid-carrying structure and full-liquid evaporator suitable for full-liquid evaporator to solve the problems existing in prior art, avoid the liquid knock phenomenon produced by liquid-carrying, effectively improve evaporator efficiency, improve compressor safety performance, prolong the service life of compressor.

[0005] Technical scheme: to achieve the above-mentioned purpose, the utility model can adopt the following technical scheme: anti-liquid-carrying structure, including at least one layer of baffle arranged above refrigerant level;And multiple-stage filter screen vertically arranged between baffle and upper cylinder wall;The filter screen is arranged mutually parallel, and is symmetrically arranged with horizontal extension to both sides with central refrigeration gas outlet as center, at least three levels of filter screen are arranged on each side, and the aperture of filter screen from center to both sides increases successively.

[0006] Further, the baffle is a layer, and is inverted V-shaped structure, middle high, both sides low.It is convenient for liquid separated by upper filter screen to flow away quickly, and rework in refrigerant below baffle.

[0007] The both sides of the baffle and the both ends of the evaporator are left with gaps.The gas-liquid mixture after first gas-liquid separation through baffle is filtered by multiple-stage filter screen from both sides of baffle upwards.

[0008] Further, three levels of filter screen are arranged on each side from center to both sides, in turn fine filter screen, middle filter screen and coarse filter screen.Multiple-stage filter screen gradually separates gas mixture, and the gas at air outlet, liquid content is greatly reduced, so as to reduce liquid-carrying problem.

[0009] The fine filter screen is a thin plate with tiny holes, the medium filter screen is a thin plate with smaller holes, and the coarse filter screen is a thin plate with larger holes; the multi-stage filter screens with gradually reduced hole diameters gradually separate the gas-liquid mixture, which not only improves the separation efficiency, but also effectively avoids the liquid blocking phenomenon generated during the gas-liquid separation.

[0010] Further, the tiny holes have a diameter of 1-3 microns, the smaller holes have a diameter of 3-5 microns, and the larger holes have a diameter of 5-10 microns.

[0011] The utility model discloses still a kind of full liquid evaporator containing above-mentioned prevent liquid structure, still include cylinder and multilayer heat exchange pipe;The cylinder bottom is equipped with refrigerant liquid inlet, and upper cylinder wall center position is equipped with refrigeration gas outlet;The cylinder one side is also equipped with heat transfer medium inlet and heat transfer medium outlet.

[0012] Further, the multilayer heat exchange pipe is equipped with a layer of baffle of inverted V type structure above, and the baffle both sides end and the cylinder both side wall are left with clearance;Multi-stage filter screen is vertically arranged on the baffle, and the filter screen top end extends to upper cylinder wall;The filter screen is mutually parallelly arranged, and is symmetrically arranged with center to refrigeration gas outlet as center horizontally extending to both sides, and is equipped with three-stage filter screen on each side, and the hole diameter of the filter screen from center to both sides increases in turn.

[0013] Beneficial effect: the utility model has the following advantages:

[0014] 1) the utility model is improved through simple structure, and gas-liquid mixture in full liquid evaporator is separated gradually in series, and finally the gas to gas outlet, and liquid content will be very low, so as to reduce the liquid problem when the evaporator works, avoid liquid backflow to compressor, affect the performance of compressor, also prevent the problem that evaporator refrigerant is consumed too fast, so as to improve the working efficiency of evaporator.

[0015] 2) the utility model adopts gradual separation method, which not only improves separation efficiency, but also effectively avoids liquid blocking phenomenon generated during gas-liquid separation. DRAWINGS

[0016] Figure 1 It is full liquid evaporator structure schematic diagram of embodiment 1 of the utility model and contains prevent liquid structure.

[0017] Figure 2 It is three-stage filter screen hole diameter size contrast structure schematic diagram in embodiment 1 of the utility model. CONCRETE IMPLEMENTING METHOD

[0018] Embodiment 1:

[0019] Please refer to Figure 1The utility model discloses a full -liquid type evaporator containing prevent liquid structure, including cylinder 10 and multilayer heat exchange pipe 9, the bottom of cylinder 10 is equipped with refrigerant liquid inlet 6, and the upper cylinder wall center position is equipped with refrigeration gas outlet 5, one side of cylinder 10 is also equipped with heat transfer medium inlet 7 and heat transfer medium outlet 8.

[0020] The multilayer heat exchange pipe 9 is provided with a layer of baffle 1 of inverted V-shaped structure with middle height and both sides low, which facilitates the liquid separated by the filter screen on the top to flow away quickly and re-enter the refrigerant below the baffle 1 to work. The baffle 1 is provided with a plurality of filter screens vertically arranged on the baffle 1, and the top end of the filter screen extends to the upper cylinder wall.

[0021] The filter screens are arranged in parallel with each other, and symmetrically arranged horizontally to both sides with the center of the refrigeration gas outlet 5, and each side is provided with three filter screens, and the pore size of the filter screens from the center to both sides increases in turn, and the filter screens are in turn fine filter screen 4, middle filter screen 3 and coarse filter screen 2; wherein the fine filter screen 4 is a thin plate with a plurality of small holes, and the pore size is 2 μm; the middle filter screen 3 is a thin plate with a plurality of small holes, and the pore size is 4 μm; the coarse filter screen 2 is a thin plate with a plurality of large holes; the pore size is 8 μm; the specific pore size comparison schematic diagram can be referred to Figure 2 The utility model discloses a full -liquid type evaporator containing prevent liquid structure, including cylinder 10 and multilayer heat exchange pipe 9, the bottom of cylinder 10 is equipped with refrigerant liquid inlet 6, and the upper cylinder wall center position is equipped with refrigeration gas outlet 5, one side of cylinder 10 is also equipped with heat transfer medium inlet 7 and heat transfer medium outlet 8.

[0022] The multistage filter screen gradually separates the gas mixture, and the gas reaching the gas outlet has greatly reduced liquid content, thereby reducing the liquid-carrying problem.

[0023] Working process:

[0024] The refrigerant liquid enters the evaporator from the refrigerant liquid inlet 6 at the bottom of the cylinder 10, and after heat exchange of the multilayer heat exchange pipe 9 and the refrigerant and the heat transfer medium, the gas-liquid mixture generated during the operation of the evaporator passes through the baffle 1, the liquid inertia is large, collides with the baffle 1 to achieve separation, and the baffle 1 completes the first gas-liquid separation; the gas-liquid mixture after the first gas-liquid separation flows upwards from both sides of the baffle 1, and then passes through the coarse filter screen 2 for secondary filtration separation; after filtration of the coarse filter screen 2, the liquid of the gas-liquid mixture is further reduced, and then passes through the middle filter screen 3 for further filtration, which further reduces the liquid content, and then passes through the fine filter screen 4 for filtration. The gas-liquid mixture is gradually separated through this series of separation, and the gas reaching the gas outlet has very low liquid content, thereby reducing the liquid-carrying problem during the operation of the evaporator, avoiding the liquid backflow to the compressor, affecting the performance of the compressor, preventing the problem of excessive consumption of the refrigerant of the evaporator, and improving the working efficiency of the evaporator.

[0025] The utility model discloses a separating device for refrigerant, which comprises a separating device body, a filter screen, a baffle and a liquid collecting device, wherein the filter screen is arranged on the separating device body, the baffle is arranged on the filter screen, and the liquid collecting device is arranged on the baffle. In addition, the baffle is inverted V-shaped, high in the middle and low on both sides, so that the liquid separated by the filter screen on the top can quickly flow away and re-enter the refrigerant under the baffle to work.

Claims

1. Anti-liquid structure, characterized by: It includes at least one layer of baffles arranged above the refrigerant liquid level; and multi-stage filter screens vertically arranged between the baffles and the upper cylinder wall; the filter screens are arranged parallel to each other and extend horizontally and symmetrically to both sides with the central refrigerant gas outlet as the center, with at least three stages of filter screens on each side, and the aperture of the filter screens increases successively from the center to both sides.

2. The anti-fluid structure according to claim 1, characterized in that: The baffle is a single layer, in an inverted V-shaped structure, with the middle being higher and the two sides being lower.

3. The anti-fluid structure according to claim 1, characterized in that: Gaps are left between the two side ends of the baffle and the two ends of the evaporator.

4. The anti-liquid carrying structure according to claim 1, characterized in that: There are three levels of filters on each side from the center, namely fine filter, medium filter and coarse filter.

5. The anti-liquid carrying structure according to claim 4, characterized in that: The fine filter is a thin plate covered with extremely small holes, the medium filter is a thin plate covered with relatively small holes, and the coarse filter is a thin plate covered with relatively large holes.

6. The anti-fluid structure according to claim 5, characterized in that: The pore size of the extremely small pore is 1 μm-3 μm; the pore size of the smaller pore is 3 μm-5 μm; and the pore size of the larger pore is 5 μm-10 μm.

7. A flooded evaporator comprising the anti-carrying structure according to any one of claims 1 to 6, characterized in that It also includes a cylinder and multi-layer heat exchange tubes; a refrigerant liquid inlet is provided at the bottom of the cylinder, and a refrigerant gas outlet is provided at the center of the upper cylinder wall; a coolant inlet and a coolant outlet are also provided on one side of the cylinder.

8. The flooded evaporator according to claim 7, characterized in that: A baffle with an inverted V-shaped structure is provided above the multi-layer heat exchange tube, and gaps are left between the two side ends of the baffle and the two side walls of the cylinder; multi-stage filter screens are vertically provided on the baffle, and the top of the filter screens extends to the upper cylinder wall; the filter screens are arranged parallel to each other, and are horizontally extended symmetrically to both sides with the central refrigerant gas outlet as the center, and each side is provided with three-stage filter screens, and the aperture of the filter screens increases successively from the center to both sides.

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