Refrigerant flooded liquid separator structure

Abstract

The refrigerant flooded liquid separator structure comprises a liquid inlet pipe, a shell, a partition plate and a liquid separation pipe, and one end of the liquid inlet pipe penetrates into the shell from the bottom of the shell and extends to the position, close to the upper portion, in the shell; the partition plate is horizontally arranged in the shell, a through hole in butt joint with the end of the liquid inlet pipe is formed in the middle of the partition plate, the center of the partition plate is connected with the end of the liquid inlet pipe, the edge of the partition plate is close to the shell, and a gap is reserved between the edge and the shell. The liquid distribution pipe is upwards inserted into the shell from the bottom of the shell, an opening is formed in the upper end of the liquid distribution pipe, and liquid distribution holes are formed in the peripheral wall of the liquid distribution pipe. The liquid distributor can achieve the effects of being uniform in liquid distribution, small in pressure drop and easy to machine, and is suitable for being used under all working conditions.

Description

Technical Field

[0001] This application relates to the technical field of liquid distributors, and particularly to a refrigerant flooded liquid distributor structure. Background Art

[0002] In the current energy storage thermal management field, to ensure that the battery is within a suitable operating temperature range, it needs to be cooled at high temperatures. To maintain the efficient long-cycle life operation of the battery, the latest technology for cooling energy storage batteries is to directly cool the cold plate by direct cooling. The refrigerant after throttling and pressure reduction by the throttling mechanism is evenly distributed to each direct cooling cold plate through a liquid distributor to perform evaporation heat exchange cooling on the battery or other heat-generating components. This liquid distributor is a very important component in the entire refrigeration cycle and has a great impact on the temperature uniformity and refrigeration effect of the battery. Common forms of liquid distributors are as follows:

[0003] Venturi liquid distributor: This type of liquid distributor is actually a nozzle. The two-phase refrigerant coming out of the throttling mechanism enters the liquid distributor and first contracts to increase the flow rate and decrease the pressure. After passing through the throat, it decelerates and expands, and the two-phase refrigerant is evenly mixed by the pressure energy, and then enters each evaporator (here refers to the cold plate) equally. The contraction and expansion sections in the pipe adopt a smooth transition, and no turbulence occurs during the entire flow process, so the pressure loss is small. However, the profiling of its internal flow channel is difficult to process, the cost is high, the liquid distribution effect is poor, it is greatly affected by the mass flow rate, dryness, and installation angle, and it can only be used within the rated range.

[0004] Pressure-drop liquid distributor: This type of liquid distributor consists of a spring retaining ring, a throttle orifice plate, and a housing. The two-phase refrigerant coming out of the throttling mechanism enters the liquid distributor and first passes through the internally provided throttle orifice plate. Due to the sudden contraction of the cross-section, the kinetic energy of the refrigerant increases and the flow rate increases, and a pressure difference is formed on both sides when passing through the throttle orifice plate. A mixing chamber is provided at the rear side of the throttle orifice plate. When the high-speed refrigerant enters the mixing chamber, eddy currents are generated, so that the gas-liquid two-phase refrigerant is fully mixed, and then flows evenly into each evaporator (here refers to the cold plate) along the liquid distribution pipe. However, this type of liquid distributor throttles the refrigerant to cause turbulence to fully mix the two-phase refrigerant, so there is a large pressure drop and it is greatly affected by the mass flow rate and dryness.

[0005] Centrifugal liquid distributor: This type of liquid distributor consists of a hollow disk and corresponding output ends. The output ends are radially arranged equidistantly outside the disk. The gas-liquid mixture from the expansion valve flows tangentially into the interior circumference and forms a swirling liquid layer on the inner wall under the action of centrifugal force. After passing through the mixing section, the liquid is evenly distributed to each output port. The liquid distribution head should be installed as close as possible to the expansion valve. Otherwise, due to the supercooling of the liquid in front of the valve, the gas content in the refrigerant behind the valve and the flow rate of the refrigerant entering the liquid distribution head will be reduced, which is not conducive to uniform liquid distribution, and it is difficult to insert and position the tangential pipe. Noise may be generated due to internal pressure oscillation.

[0006] Liquid storage type liquid distributor: This type of liquid distributor consists of an inlet pipe, a hollow cylinder, and an output end. After the refrigerant flows into the liquid distributor, its speed decreases, and part of the liquid deposits at the bottom. Above the liquid distributor, the carried liquid and gas are gradually mixed evenly and finally flow into each branch. However, its volume is relatively large, and the diameter and height of the cylinder need to be reasonably designed to form liquid accumulation at the bottom to achieve the optimal performance, and it can only be applied within a certain flow range. Summary of the Utility Model

[0007] Therefore, the present application provides a refrigerant flooded liquid distributor structure to solve the problems of uneven liquid distribution, large pressure drop, difficult processing, and only applicable to some working conditions existing in the prior art.

[0008] In order to achieve the above object, the present application provides the following technical solutions:

[0009] A refrigerant flooded liquid distributor structure includes an inlet pipe, a housing, a partition plate, and a liquid distribution pipe. One end of the inlet pipe penetrates into the housing from the bottom and extends to a position above the interior of the housing; the partition plate is horizontally arranged in the housing, and a through hole for docking with the end of the inlet pipe is provided in the middle. The central position of the partition plate is connected to the end of the inlet pipe, and the edge is close to the housing and there is a gap between the edge and the housing; the liquid distribution pipe is inserted into the housing upward from the bottom of the housing. The upper end of the liquid distribution pipe is open, and liquid distribution holes are provided on the peripheral wall.

[0010] Optionally, a plurality of the liquid distribution holes are provided on the liquid distribution pipe and are distributed at different height positions of the liquid distribution pipe.

[0011] Optionally, a filter fixing plate is further provided in the housing. The filter fixing plate is arranged below the partition plate, and through holes for the liquid distribution pipe and the inlet pipe to pass through are provided on the surface.

[0012] Optionally, the filter fixing plate is parallel to the partition plate.

[0013] Optionally, the end of the liquid distribution pipe contacts the bottom surface of the partition plate.

[0014] Optionally, the end of the liquid distribution pipe is inclined toward one side to form an inclined opening.

[0015] Optionally, the inclined opening faces the axis of the housing.

[0016] Optionally, the part of the inlet pipe inside the housing is coaxial with the housing.

[0017] Optionally, the number of the liquid distribution pipes is multiple, and the multiple liquid distribution pipes are evenly distributed in a circle with the inlet pipe as the axis.

[0018] Compared with the prior art, the present application has at least the following beneficial effects:

[0019] 1. After the gas-liquid two-phase refrigerant is throttled and depressurized by the throttling mechanism, it enters the outer shell through the liquid inlet pipe. Due to gravity, the liquid refrigerant falls to the bottom of the outer shell through the partition plate and enters each liquid distribution pipe evenly through the liquid distribution holes. The gaseous refrigerant enters each liquid distribution pipe evenly through the openings at the ends of the liquid distribution pipes in contact with the partition plate. Finally, the gaseous refrigerant and liquid refrigerant entering each liquid distribution pipe are equal in quantity and flow into each evaporator (here refers to the cold plate) together for evaporation and heat absorption. This achieves the effect of uniform liquid distribution, ensures that the evaporation temperatures of each cold plate are consistent, reduces the temperature difference between each battery, avoids the problems of overcharging and over-discharging of the battery, and improves the battery life and reliability.

[0020] 2. It has a small pressure drop and less energy loss, and has the advantages of high efficiency and energy saving.

[0021] 3. The structure is simple, no need to open molds and perform machining. It can be cut, drilled, and welded according to the existing materials according to the drawings. The diameter of the outer shell, height, number of liquid distribution holes, diameter of the liquid inlet pipe, and diameter of the liquid distribution pipe can all be adjusted and processed arbitrarily according to the actual situation. It has low cost, simple processing, and no quality hidden dangers.

[0022] 4. It can be applied to various working conditions. Multiple liquid outlet holes are drilled at different heights on the liquid distribution pipes near the bottom of the outer shell. No matter how much liquid enters, it can be evenly distributed into each cold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more intuitively illustrate the prior art and this application, the following exemplary drawings are given. It should be understood that the specific shapes and structures shown in the drawings are generally not regarded as limiting conditions when implementing this application; for example, those skilled in the art are capable of making routine adjustments or further optimizations to the addition / removal / attribution division of certain units (components), specific shapes, positional relationships, connection methods, dimensional proportional relationships, etc. based on the technical concept disclosed in this application and the exemplary drawings.

[0024] Figure 1 FIG. is a schematic structural diagram of a refrigerant flooded type liquid distributor structure provided by an embodiment of this application.

[0025] Description of the reference numerals:

[0026] 1. Outer shell; 2. Partition plate; 3. Liquid distribution pipe; 4. Filter fixing plate; 5. Liquid distribution hole; 6. Liquid inlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will further describe this application in detail through specific embodiments in conjunction with the drawings.

[0028] In the description of this application: unless otherwise specified, "a plurality of" means two or more. Expressions such as "include", "comprising", "having" and the like also mean "not limited to" (certain units, components, materials, steps, etc.).

[0029] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the convenience of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0030] A refrigerant full liquid distributor structure, referring to Figure 1 The device comprises a liquid inlet pipe 6, a housing 1, a partition plate 2, and a liquid dispensing pipe 3. The housing 1 is a cylindrical bottle-like structure, with its axis vertical and its bottom surface horizontal. A circular hole is provided in the center of the bottom surface for passage of one end of the liquid inlet pipe 6, ensuring that the portion of the liquid inlet pipe 6 within the housing 1 is coaxial with the housing 1. After passing through the housing 1, the liquid inlet pipe 6 extends to a position higher within the interior of the housing 1.

[0031] Separator plate 2 is positioned horizontally above the housing 1. A central aperture is defined, accommodating the end of liquid inlet pipe 6. The center of this aperture is coaxial with the axis of the housing 1. Furthermore, the center of separator plate 2 (i.e., the wall of the aperture) connects to the end of liquid inlet pipe 6, allowing the gas-liquid refrigerant in liquid inlet pipe 6 to flow above separator plate 2. The edge of separator plate 2 is positioned adjacent to the housing 1, with a gap between them to facilitate the passage of gas-liquid refrigerant.

[0032] The liquid separation pipe 3 is vertically inserted into the shell 1 from the bottom upward, and the upper end of the liquid separation pipe 3 is open for allowing gas-phase refrigerant to enter; a liquid separation hole 5 is opened on the peripheral wall of the liquid separation pipe 3 for allowing liquid-phase refrigerant to enter.

[0033] Furthermore, multiple distribution pipes 3 are evenly arranged around the liquid inlet pipe 6, and the distance between each distribution pipe 3 and the liquid inlet pipe 6 is equal. In addition, each distribution pipe 3 has multiple distribution holes 5 at different heights along the bottom of the shell upward. This ensures that the refrigerant liquid level is evenly distributed to each distribution pipe 3 through the distribution holes 5 at different heights under different operating conditions, regardless of its position, ensuring that the refrigerant entering each cold plate is evenly distributed.

[0034] The number of the liquid separation tubes 3 and the liquid separation holes 5 is not fixed and can be increased or decreased according to actual needs.

[0035] During the implementation process, the gas-liquid two-phase refrigerant after throttling and pressure reduction by the throttling mechanism enters the outer shell 1 through the liquid inlet pipe 6. The liquid refrigerant falls into the bottom of the outer shell 1 through the partition plate 2 due to gravity, and is evenly distributed into each liquid distribution pipe 3 through the liquid distribution holes 5 of each liquid distribution pipe 3. The gaseous refrigerant evenly enters each liquid distribution pipe 3 through the inclined openings at the ends of the liquid distribution pipes 3 in contact with the partition plate 2. Finally, the gaseous refrigerant and the liquid refrigerant entering each liquid distribution pipe 3 are equal in amount and flow into each evaporator (here referring to the cold plate) together for evaporation and heat absorption.

[0036] Specifically, the end of the liquid distribution pipe 3 contacts the bottom surface of the partition plate 2 to ensure that the depth of each liquid distribution pipe 3 inserted into the outer shell 1 is the same.

[0037] The end opening of the liquid distribution pipe 3 is inclined towards one side to form an inclined opening, and the inclined opening faces the axis of the outer shell 1. The gaseous refrigerant in the upper part of the outer shell 1 is evenly distributed into each liquid distribution pipe 3 through the inclined opening at the end of the liquid distribution pipe 3.

[0038] To improve the stability of the liquid distribution pipe 3, a filter fixing plate 4 is also provided inside the outer shell 1, and the filter fixing plate 4 is parallel to the partition plate 2. The filter fixing plate 4 is arranged below the partition plate 2, and through holes for the liquid distribution pipe 3 and the liquid inlet pipe 6 to pass through are provided on the surface. The filter fixing plate 4 can not only position the positions of the liquid distribution pipes 3 to ensure that the liquid distribution pipes 3 are inserted into the outer shell 1 without inclination and are firmly fixed, but also make the gas-liquid separation more uniform when the gas-liquid two-phase refrigerant contacts the filter fixing plate 4, and can also block a part of the impurities from entering the cold plate.

[0039] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered to be within the scope described in this specification.

Claims

1. A refrigerant flooded type distributor structure, characterized in that: It includes a liquid inlet pipe (6), a housing (1), a partition plate (2) and a liquid distribution pipe (3). One end of the liquid inlet pipe (6) penetrates into the housing (1) from the bottom and extends to a position above the middle inside the housing (1). The partition plate (2) is horizontally arranged inside the housing (1), and a through hole for docking with the end of the liquid inlet pipe (6) is provided in the middle. The center position of the partition plate (2) is connected to the end of the liquid inlet pipe (6), and the edge is close to the housing (1) with a gap left between it and the housing (1). The liquid distribution pipe (3) is inserted into the housing (1) from the bottom upward. The upper end of the liquid distribution pipe (3) is open, and liquid distribution holes (5) are provided on the peripheral wall.

2. The refrigerant flooded type distributor structure according to claim 1, wherein: A plurality of the liquid distribution holes (5) are provided on the liquid distribution pipe (3) and are distributed at different height positions of the liquid distribution pipe (3).

3. The refrigerant flooded type liquid distributor structure according to claim 1, characterized in that: A filter fixing plate (4) is further provided inside the housing (1). The filter fixing plate (4) is arranged below the partition plate (2), and through holes for the liquid distribution pipe (3) and the liquid inlet pipe (6) to pass through are provided on the surface.

4. The refrigerant flooded distributor structure according to claim 3, characterized in that: The filter fixing plate (4) is parallel to the partition plate (2).

5. The refrigerant flooded type distributor structure according to claim 1, characterized in that: The end of the liquid distribution pipe (3) is in contact with the bottom surface of the partition plate (2).

6. The refrigerant flooded type distributor structure according to claim 1, characterized in that: The end opening of the liquid distribution pipe (3) inclines towards one side to form an inclined opening.

7. The refrigerant flooded type distributor structure according to claim 6, wherein: The inclined opening faces the axis of the housing (1).

8. The refrigerant flooded type distributor structure according to claim 1, characterized in that: The part of the liquid inlet pipe (6) inside the housing (1) is coaxial with the housing (1).

9. The refrigerant flooded type distributor structure according to claim 1, wherein: The number of the liquid distribution pipes (3) is multiple, and the multiple liquid distribution pipes (3) are evenly distributed in a circle with the liquid inlet pipe (6) as the axis.

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