Liquid homogenizer, falling film evaporator and air conditioner

Abstract

The invention relates to the technical field of air conditioners, in particular to a liquid homogenizer, a falling film evaporator and an air conditioner. The technical problems that under the action of pressure difference, a liquid film can rise along a wing plate, so that the phenomenon that a compressor carries liquid in air suction is aggravated, and the service life of the compressor and the stability of an air conditioner are affected in the prior art are solved. Therefore, the liquid uniformizing device comprises a liquid uniformizing plate provided with a plurality of air return holes; the wing plate is obliquely arranged below the air return hole; the liquid film baffle is arranged on the side, facing the air return hole, of the wing plate, and the liquid film baffle is arranged in a downward inclined mode. The air suction liquid carrying amount of the compressor can be reduced, the service life of the compressor is prolonged, and the stability of the air conditioner is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly relates to a liquid distributor, a falling film evaporator, and an air conditioner. Background Art

[0002] An air conditioner unit is an indispensable device in modern buildings. There are various forms of the core component evaporator, including dry type, flooded type, falling film type, etc. Among them, the falling film evaporator has advantages such as low refrigerant charge and high heat transfer efficiency, which can reduce the refrigerant charge and save costs, and is favored by more and more air conditioner manufacturers. During the actual operation of the air conditioner unit, the operating conditions change greatly, so the refrigerant flow field inside the evaporator changes greatly, and there is a risk of liquid entrainment during suction under some operating conditions, which affects the service life of the compressor.

[0003] Related technologies avoid liquid refrigerant from entering the suction port of the falling film evaporator by setting wing plates. However, under the action of the pressure difference, the liquid film will rise along the wing plates, thus aggravating the liquid entrainment phenomenon during the compressor's suction, affecting the service life of the compressor and the stability of the air conditioner.

[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the technical problem that under the action of the pressure difference, the liquid film will rise along the wing plates, thus aggravating the liquid entrainment phenomenon during the compressor's suction, affecting the service life of the compressor and the stability of the air conditioner.

[0006] In a first aspect, the present application provides a liquid distributor, which includes: a liquid distribution plate provided with a plurality of return air holes; a wing plate inclined below the return air holes; and a liquid film baffle provided on the side of the wing plate facing the return air holes, and the liquid film baffle is inclined downward.

[0007] In some embodiments, the value range of the included angle between the wing plate and the liquid film baffle is 15° to 75°.

[0008] In some embodiments, the minimum distance between the position of the liquid film baffle on the wing plate surface and the liquid distribution plate is greater than 1 / 2H, and the maximum distance between the position of the liquid film baffle on the wing plate surface and the liquid distribution plate is less than 4 / 5H, where H is the height of the wing plate.

[0009] In some embodiments, the value range of the height of the liquid film baffle is 5 mm to 30 mm; and / or, the value range of the length of the liquid film baffle is 0.3*L to 0.66*L, where L is the length of the wing plate; and / or, the value range of the included angle between the wing plate and the liquid distribution plate is 90° to 150°.

[0010] In some embodiments, the liquid distributor includes a plurality of liquid film baffles which are arranged on the wing plate along the direction away from the liquid distribution plate, and the distance between two adjacent liquid film baffles ranges from 10 mm to 50 mm.

[0011] In some embodiments, the liquid film baffle includes a fixing portion and an extending portion. The fixing portion is used for fixing to the wing plate, and the extending portion extends downward in a direction away from the wing plate; and / or, the liquid film baffle and the wing plate are integrally formed.

[0012] In some embodiments, the liquid distribution plate includes a liquid distribution area and gas return areas distributed on both sides of the liquid distribution area, and the gas return holes are arranged in the gas return areas; wherein, the liquid film baffle is arranged on the wing plate and extends downward obliquely toward the gas return area; and / or, the liquid film baffle is arc-shaped, bent or V-shaped; and / or, the liquid distributor further includes a gravity box which is provided with a plurality of liquid distribution holes, and the liquid distribution holes include flanges which are turned over in the direction of gravity.

[0013] In a second aspect, the present application provides a falling film evaporator, which includes: a housing; heat exchange tubes arranged in the housing; and the above-mentioned liquid distributor arranged above the heat exchange tubes, wherein the wing plate extends between the heat exchange tubes and the liquid distribution plate.

[0014] In some embodiments, there is a first air flow channel between the liquid distributor and the housing, and the falling film evaporator further includes a filter demister which is arranged in the first air flow channel; and / or, along the vertical direction, the heat exchange tubes are divided into a plurality of falling film areas, and a second air flow channel is arranged between two adjacent falling film areas.

[0015] In a third aspect, the present application provides an air conditioner which includes the above-mentioned falling film evaporator.

[0016] In the case of adopting the above technical solution, the wing plate is obliquely arranged below the gas return hole of the liquid distribution plate, which can block the liquid refrigerant from entering the gas return hole and reduce the liquid carry-over amount during the suction of the compressor. At the same time, the present application provides a liquid film baffle on the liquid distribution plate. The liquid film baffle can block the liquid film from rising along the wing plate, and the downward inclination of the liquid film baffle can guide the liquid film to flow downward along the liquid film baffle and flow back into the evaporator, which is beneficial to further reducing the liquid carry-over amount during the suction of the compressor, improving the service life of the compressor and improving the stability of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application will be described below with reference to the accompanying drawings. In the drawings:

[0018] Figure 1A structural schematic diagram of the liquid distributor provided by the present application;

[0019] Figure 2 A structural schematic diagram of the falling film evaporator provided by the present application;

[0020] Figure 3 A structural schematic diagram of the liquid film baffle installed on the wing plate;

[0021] Figure 4 is Figure 3 An enlarged structural schematic diagram of the liquid film baffle in

[0022] Figure 5 A structural schematic diagram of multiple liquid film baffles installed on the wing plate;

[0023] Figure 6 Another structural schematic diagram of the falling film evaporator provided by the present application;

[0024] Figure 7 Another structural schematic diagram of the falling film evaporator provided by the present application;

[0025] Figure 8 A structural schematic diagram of the liquid film baffle provided by the present application.

[0026] List of Reference Signs

[0027] 100, liquid distribution plate; 101, gas return hole; 102, liquid distribution area; 103, gas return area; 200, wing plate; 300, liquid film baffle; 301, fixing part; 302, extension part; 400, housing; 401, first air flow channel; 500, heat exchange tube; 600, mesh demister. Detailed embodiments

[0028] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. For example, although the following embodiments of the present application are described in combination with a falling film evaporator and an air conditioner, this is not intended to limit the protection scope of the present application. Without departing from the principle of the present application, the present application can also be applied to other devices.

[0029] It should be noted that in the description of this application, the terms indicating directions or positional relationships such as "middle", "upper", "lower", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. "Plural" means two or more.

[0030] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0031] An air-conditioning unit is an indispensable device in modern buildings. Its core component, the evaporator, has various forms, including dry type, flooded type, falling film type, etc. Among them, the falling film evaporator has advantages such as low refrigerant charge and high heat transfer efficiency, which can reduce the refrigerant charge and save costs, and is favored by more and more air-conditioning manufacturers. The operating conditions during the actual operation of the air-conditioning unit vary greatly, so the refrigerant flow field inside the evaporator changes greatly, and there is a risk of liquid carry-over during suction under some operating conditions, which affects the service life of the compressor.

[0032] The related art avoids liquid refrigerant from entering the suction port of the falling film evaporator by setting wing plates. However, under the action of the pressure difference, the liquid film will rise along the wing plates, thus aggravating the liquid carry-over phenomenon during the compressor's suction, and affecting the service life of the compressor and the stability of the air conditioner.

[0033] This application provides a liquid distributor, a falling film evaporator, and an air conditioner, which can reduce the liquid carry-over amount during the compressor's suction, improve the service life of the compressor, and improve the stability of the air conditioner.

[0034] In a first aspect, this application provides a liquid distributor.

[0035] Combined with Figure 1 , Figure 2 and Figure 3 as shown, the liquid distributor includes a liquid distribution plate 100, wing plates 200, and a liquid film baffle 300.

[0036] The liquid distribution plate 100 is provided with a plurality of gas return holes 101.

[0037] The wing plates 200 are inclined and arranged below the gas return holes 101.

[0038] The liquid film baffle 300 is arranged on the side of the wing plate 200 facing the return air hole 101, and the liquid film baffle 300 is arranged to incline downward.

[0039] In the case of adopting the above technical solution, the wing plate 200 is inclined and arranged below the return air hole 101 of the liquid distribution plate 100, which can block the liquid refrigerant from entering the return air hole 101 and reduce the liquid carry - over amount during the compressor's suction. At the same time, in this application, a liquid film baffle 300 is arranged on the liquid distribution plate 100. The liquid film baffle 300 can block the liquid film from rising along the wing plate 200, and the downward inclination of the liquid film baffle 300 can guide the liquid film to flow downward along the liquid film baffle 300 and flow back into the evaporator, which is beneficial to further reducing the liquid carry - over amount during the compressor's suction, improving the service life of the compressor and the stability of the air conditioner.

[0040] In some embodiments, as shown in combination with Figure 4 the included angle α1 between the wing plate 200 and the liquid film baffle 300 ranges from 15° to 75°.

[0041] By limiting the included angle α1 between the wing plate 200 and the liquid film baffle 300 within the above range, the liquid film can be effectively blocked, enabling the liquid film to flow back to the heat exchanger in the expected direction. If the included angle α1 is too small, vortices will be generated at the liquid film baffle 300, which is not conducive to the separation and falling of the liquid film. If the included angle α1 is too large, the liquid film may be blown up again, and the liquid blocking effect of the liquid film baffle 300 becomes poor.

[0042] For example, the value of the included angle α1 between the wing plate 200 and the liquid film baffle 300 can be 15°, 20°, 23°, 25°, 30°, 36°, 40°, 45°, 50°, 55°, 60°, 65°, 70° or 75°, etc.

[0043] In some embodiments, the minimum distance between the position of the liquid film baffle 300 on the surface of the wing plate 200 and the liquid distribution plate 100 is greater than 1 / 2H, and the maximum distance between the position of the liquid film baffle 300 on the surface of the wing plate 200 and the liquid distribution plate 100 is less than 4 / 5H, where H is the height of the wing plate 200. It can be understood that when the number of liquid film baffles 300 is multiple, the minimum distance between the position of the liquid film baffle 300 closest to the liquid distribution plate 100 on the surface of the wing plate 200 and the liquid distribution plate 100 is greater than 1 / 2H, and the maximum distance between the position of the liquid film baffle 300 farthest from the liquid distribution plate 100 on the surface of the wing plate 200 and the liquid distribution plate 100 is less than 4 / 5H.

[0044] By setting the height position of the liquid film baffle 300 on the wing plate 200 within the above range, the upward movement of the liquid film can be blocked more effectively, reducing the risk of the liquid film entering the suction port. Moreover, it can balance the weight at the lower end of the wing plate, reduce the generation of vibration and noise, and is conducive to ensuring the firmness of the liquid film baffle 300 and the stability of the equipment. If the height position of the wing plate 200 is too high, the liquid film is easily sucked into the suction port, affecting the normal operation of the equipment. If the height position of the wing plate 200 is too low, it will increase the weight at the lower end of the wing plate 200. Under the lever action, it is not only easy to generate vibration and noise, affecting the user experience, but also affects the firmness of the fixation of the wing plate 200, and there is a risk of the wing plate 200 falling off.

[0045] For example, the distance between the position of the liquid film baffle 300 on the surface of the wing plate 200 and the liquid distribution plate 100 can be 1 / 2H, 0.55H, 0.58H, 0.60H, 0.62H, 0.68H, 0.71H, 0.73H, 0.76H or 4 / 5H, etc.

[0046] In some embodiments, as shown in Figure 4 the value range of the height a of the liquid film baffle 300 is 5 mm to 30 mm.

[0047] By limiting the height a of the liquid film baffle 300 within the above range, the interference with the flow field in the heat exchanger can be reduced, and at the same time, the blocking effect on the liquid film can be ensured, which is convenient for processing and manufacturing. As shown in Figure 2 if the height of the liquid film baffle 300 is too large, the cross-sectional area of the air flow channel becomes smaller, the air flow velocity increases, and the risk of liquid entrainment will increase; if the height of the liquid film baffle 300 is too small, it is not convenient for production and processing.

[0048] For example, the value of the height a of the liquid film baffle 300 can be 5 mm, 6 mm, 7 mm, 10 mm, 10 mm, 12 mm, 15 mm, 18 mm, 20 mm, 23 mm, 25 mm, 28 mm or 30 mm, etc.

[0049] In some embodiments, as shown in Figure 1 the value range of the length b of the liquid film baffle 300 is 0.3*L to 0.66*L, where L is the length of the wing plate 200.

[0050] It can be understood that a liquid inlet pipe and a suction pipe are arranged above the liquid distribution plate 100. By limiting the length b of the liquid film baffle 300 within the above range, the liquid film on the side where the suction pipe is located can be preferentially blocked, which can not only ensure the liquid blocking effect but also avoid excessive increase in the weight of the wing plate 200. If the length b of the liquid film baffle 300 is too long, the weight of the wing plate 200 will increase too much, and the wing plate 200 will vibrate during the operation of the air conditioner, generating noise and affecting the user experience; if the length b of the liquid film baffle 300 is too short, the blocking effect on the liquid film will be weak.

[0051] For example, the value of the length b of the liquid film baffle 300 can be 0.30L, 0.33L, 0.35L, 0.38L, 0.40L, 0.45L, 0.49L, 0.50L, 0.53L, 0.56L, 0.58L, 0.60L, 0.63L, 0.66L, etc.

[0052] In some embodiments, in combination with Figure 2 as shown, the value range of the included angle α2 between the wing plate 200 and the liquid distribution plate 100 is 90° to 150°.

[0053] In combination with Figure 1 and Figure 2 as shown, in the heat exchanger, the liquid distribution plate 100 is arranged on the upper side of the refrigerant pipe. The top end of the wing plate 200 is fixed on the liquid distribution plate 100, and the bottom end of the wing plate 200 extends obliquely below the return air hole 101. The return air hole 101 and the refrigerant pipe are located on opposite sides of the wing plate 200. The liquid refrigerant flows downward along the surface of the refrigerant pipe and exchanges heat with the refrigerant pipe; the gaseous refrigerant flows upward to the return air hole 101, passes through the return air hole 101 and enters above the liquid distribution plate 100, and then is sucked into the compressor through the suction pipe. The refrigerant pipe is divided into multiple regions from top to bottom, including the falling film region 1 close to the liquid distribution plate 100. The refrigerant pipe in the falling film region 1 and the wing plate 200 enclose a third air flow channel. The gaseous refrigerant in the falling film region 1 flows downward along the third air flow channel, bypasses the wing plate 200 and then flows upward into the return air hole 101. Therefore, by setting the wing plate 200, it can prevent the gaseous refrigerant in the falling film region 1 from being directly sucked into the return air hole 101 without gas-liquid separation, and avoid affecting the normal operation of the compressor due to excessive liquid entrainment during suction. If the included angle α2 between the wing plate 200 and the liquid distribution plate 100 is too small, the cross-sectional area of the third air flow channel is too small, and the air flow velocity in the third air flow channel increases, which will increase the risk of liquid entrainment; in combination with Figure 2As shown, there is a first air flow channel between the wing plate 200 and the shell of the heat exchanger. The gaseous refrigerant in the area below the first falling film area flows upward through the first air flow channel and enters the return air hole 101. If the angle α2 between the wing plate 200 and the liquid distribution plate 100 is too large, it will occupy too much area of the first air flow channel, resulting in too small cross-sectional area of the first air flow channel and increasing the air flow velocity in the first air flow channel, which will also increase the risk of liquid carrying.

[0054] For example, the value of the angle α2 between the wing plate 200 and the liquid distribution plate 100 can be 90°, 95°, 100°, 106°, 110°, 115°, 117°, 120°, 123°, 125°, 128°, 130°, 133°, 140°, 147°, 149° or 150°, etc.

[0055] In some embodiments, as shown in combination with Figure 5 shown, the liquid distributor includes a plurality of liquid film baffles 300. The liquid film baffles 300 are arranged on the wing plate 200 along the direction away from the liquid distribution plate 100. The value range of the distance between two adjacent liquid film baffles 300 is 10 mm to 50 mm. By setting a plurality of liquid film baffles 300, the blocking effect on the liquid film can be further improved to prevent the liquid film from rising along the wing plate 200. If the distance between two adjacent liquid film baffles 300 is too large, the blocking effect on the liquid film will be weakened; if the distance between two adjacent liquid film baffles 300 is too small, it will cause inconvenience in processing and assembly, etc.

[0056] For example, the value of the distance between two adjacent liquid film baffles 300 can be 10 mm, 15 mm, 17 mm, 20 mm, 25 mm, 28 mm, 30 mm, 35 mm, 38 mm, 40 mm, 43 mm, 47 mm or 50 mm, etc.

[0057] In some embodiments, as shown in combination with Figure 4 shown, the liquid film baffle 300 includes a fixing part 301 and an extending part 302. The fixing part 301 is used to fix to the wing plate 200, and the extending part 302 extends downward in the direction away from the wing plate 200. By setting the fixing part 301, it is convenient to fix the liquid film baffle 300 to the wing plate 200. By setting the extending part 302, the liquid film can be blocked from continuing to rise. The liquid film moves downward along the extending part 302 and converges and drips to the evaporator at the free end of the extending part 302.

[0058] Optionally, the fixing part 301 is fixed to the wing plate 200 by welding.

[0059] In this way, the firmness of the liquid film baffle 300 can be guaranteed, ensuring that the liquid film baffle 300 will not loosen or fall off during long-term use; at the same time, the welded connection has good sealing performance, which can prevent the refrigerant from leaking from the connection between the fixing part 301 and the wing plate 200; in addition, the welded connection is relatively simple and fast, reducing the installation time and installation cost.

[0060] In other embodiments, the liquid film baffle 300 and the wing plate 200 can also be integrally formed structures to make the structure simpler and simplify the production and assembly process.

[0061] In some embodiments, combining Figure 6 and Figure 1 As shown, the liquid distribution plate 100 includes a liquid distribution area 102 and gas return areas 103 distributed on both sides of the liquid distribution area 102, and gas return holes 101 are provided in the gas return areas 103. Among them, the liquid film baffle 300 is arranged on the wing plate 200 and extends obliquely downward towards the gas return area 103. Combining Figure 6 As shown, in the heat exchanger, the refrigerant pipe is arranged below the liquid distribution area 102, a gravity box is arranged in the liquid distribution area, the gravity box is provided with a plurality of liquid equalizing holes, and the liquid refrigerant flows from the liquid equalizing holes to the surface of the refrigerant pipe to exchange heat with the refrigerant pipe. The top end of the wing plate 200 is fixed at the connection between the liquid distribution area 102 and the gas return area 103, the bottom end of the wing plate 200 extends obliquely downward towards the side away from the refrigerant pipe, and the gas return hole 101 and the refrigerant pipe are located on opposite sides of the wing plate 200. The gaseous refrigerant flows upward towards the gas return hole 101, passes through the gas return hole 101 and enters above the liquid distribution plate 100, and then is sucked into the compressor through the suction pipe.

[0062] In some embodiments, combining Figure 8 As shown, the liquid film baffle 300 is arc-shaped, bent-shaped or V-shaped. The opening of the arc-shaped, bent-shaped or V-shaped is downward. By setting the liquid film baffle 300 to the above shape, it is convenient to fix the liquid film baffle 300 to the wing plate 200, and the liquid film moves downward along the liquid film baffle 300 and converges and drips at the free end of the liquid film baffle 300 into the evaporator.

[0063] In some embodiments, the liquid equalizer further includes a gravity box, the gravity box is provided with a plurality of liquid equalizing holes, and the liquid equalizing holes include flanges that are turned over towards the gravity direction. The liquid refrigerant flows from the liquid equalizing holes to the surface of the refrigerant pipe and flows downward along the flanges of the liquid equalizing holes to exchange heat with the refrigerant pipe. By setting the liquid equalizing holes as flanged holes, it can ensure that the liquid refrigerant drips vertically downward along the flange to the center of the heat exchange pipe, effectively improving the liquid film distribution and enhancing the wrapping of the liquid film around the heat exchange pipe, thereby significantly improving the heat exchange efficiency. In addition, the cross-section and the number of holes of the flanged holes satisfy that the flow velocity of the gas-liquid mixed refrigerant is not greater than 1.5 m / s, which can ensure that the liquid refrigerant drips to the center of the heat exchange pipe after flowing out from the bottom box of the gravity box, meeting the falling film heat exchange design requirements and improving the heat exchange efficiency.

[0064] Optionally, the flanging hole can be a vertical flanging hole, a counterbore or a perforated hole, etc. The vertical flanging hole, the counterbore or the perforated hole can effectively guide the flow direction of the refrigerant, ensure that the liquid refrigerant drips vertically downward along the flanging to the center of the heat exchange tube, improve the liquid film distribution, and enhance the wrapping of the liquid film around the heat exchange tube.

[0065] In a second aspect, the present application provides a falling film evaporator.

[0066] Combined with Figure 6 and Figure 7 As shown, the falling film evaporator provided by the present application includes a housing 400, heat exchange tubes 500 and the above-mentioned liquid distributor.

[0067] The heat exchange tubes 500 are arranged inside the housing 400.

[0068] The liquid distributor is arranged above the heat exchange tubes 500, wherein the wing plate 200 extends between the heat exchange tubes 500 and the liquid distribution plate 100.

[0069] In the case of adopting the above technical solution, the wing plate 200 of the falling film evaporator provided by the present application is inclined and arranged below the air return hole 101 of the liquid distribution plate 100, which can block the liquid refrigerant from entering the air return hole 101 and reduce the liquid carry-over amount during the suction of the compressor. At the same time, the present application is provided with a liquid film baffle 300 on the liquid distribution plate 100. The liquid film baffle 300 can block the liquid film from rising along the wing plate 200, and the downward inclination of the liquid film baffle 300 can guide the liquid film to flow downward along the liquid film baffle 300 and flow back into the evaporator, which is conducive to further reducing the liquid carry-over amount during the suction of the compressor, improving the service life of the compressor and enhancing the stability of the air conditioner.

[0070] In some embodiments, combined with Figure 6 As shown, there is a first air flow channel 401 between the liquid distributor and the housing 400. The falling film evaporator further includes a filter demister 600, and the filter demister 600 is arranged in the first air flow channel 401. By arranging the filter demister 600 in the first air flow channel, the present application performs gas-liquid separation on the refrigerant in advance, which is beneficial to removing the liquid refrigerant in the gaseous refrigerant, reducing the liquid carry-over amount of the gaseous refrigerant, and improving the service life of the compressor. Moreover, arranging the filter demister 600 in the first air flow channel 401 is beneficial to reducing costs.

[0071] Optionally, the filter demister 600 is arranged obliquely. When the filter demister 600 is horizontally arranged in the first air flow channel 401, the required cross-sectional area of the filter demister 600 is small, which is beneficial to reducing costs, and performing gas-liquid separation in advance is beneficial to improving the separation effect.

[0072] Optionally, the filter demister 600 is arranged obliquely. The filter demister 600 is arranged obliquely in the first gas flow channel 401. The required cross-sectional area of the filter demister 600 is small, which is beneficial to reducing costs and separating gas and liquid in advance, which is beneficial to improving the separation effect. In addition, the separated liquid refrigerant flows along the filter demister 600 and converges at the lower end of the filter demister 600, which can avoid the formation of a liquid film at the filter demister 600 and affect the passage of gas, which is beneficial to ensuring the gas-liquid separation effect of the filter demister 600.

[0073] In some embodiments, along the vertical direction, the heat exchange tubes 500 are divided into multiple falling film areas, and a second gas flow channel is provided between two adjacent falling film areas. The heat exchange tubes 500 in this solution are arranged in zones. Sufficient gas flow channels are left between two adjacent falling film areas, which can ensure that the evaporated gaseous refrigerant is discharged in time, effectively control the flow rate of the gaseous refrigerant, and control the flow rate of the gas flow channel in each zone below 1.5 m / s, which can reduce the liquid carry-over of the gaseous refrigerant.

[0074] In a third aspect, the present application provides an air conditioner.

[0075] The air conditioner provided by the present application includes the above-mentioned falling film evaporator.

[0076] In the case of adopting the above technical solution, the wing plate 200 of the falling film evaporator of the air conditioner provided by the present application is obliquely arranged below the air return hole 101 of the liquid distribution plate 100, which can block the liquid refrigerant from entering the air return hole 101 and reduce the liquid carry-over during the suction of the compressor. At the same time, the present application is provided with a liquid film baffle 300 on the liquid distribution plate 100. The liquid film baffle 300 can block the liquid film from rising along the wing plate 200, and the downward inclination of the liquid film baffle 300 can guide the liquid film to flow downward along the liquid film baffle 300 and flow back into the evaporator, which is beneficial to further reducing the liquid carry-over during the suction of the compressor, improving the service life of the compressor and improving the stability of the air conditioner.

[0077] It should be noted that the above preferred embodiments are only used to illustrate the principle of the present application and are not intended to limit the protection scope of the present application. Without departing from the principle of the present application, those skilled in the art can adjust the above settings so that the present application can be applied to more specific application scenarios.

[0078] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any of the claimed embodiments can be used in any combination.

[0079] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims

1. A liquid distributor, characterized in that, Comprising: A liquid distribution plate provided with a plurality of air return holes; Wing plates inclinedly arranged below the air return holes; And A liquid film baffle arranged on the side of the wing plate facing the air return holes, and the liquid film baffle is inclined downward.

2. The liquid distributor according to claim 1, characterized in that, The included angle between the wing plate and the liquid film baffle ranges from 15° to 75°.

3. The liquid distributor according to claim 1, wherein, The minimum distance between the position of the liquid film baffle on the surface of the wing plate and the liquid distribution plate is greater than 1 / 2H, and the maximum distance between the position of the liquid film baffle on the surface of the wing plate and the liquid distribution plate is less than 4 / 5H, where H is the height of the wing plate.

4. The liquid distributor according to claim 1, wherein The height of the liquid film baffle ranges from 5 mm to 30 mm; and / or, The length of the liquid film baffle ranges from 0.3*L to 0.66*L, where L is the length of the wing plate; and / or, The included angle between the wing plate and the liquid distribution plate ranges from 90° to 150°.

5. The liquid distributor according to claim 1, wherein The liquid distributor includes a plurality of liquid film baffles, and the liquid film baffles are arranged on the wing plate along the direction away from the liquid distribution plate, and the distance between two adjacent liquid film baffles ranges from 10 mm to 50 mm.

6. The liquid distributor according to any one of claims 1 to 5, characterized in that, The liquid film baffle includes a fixing part and an extending part, the fixing part is used for fixing with the wing plate, and the extending part extends downward in the direction away from the wing plate; and / or, The liquid film baffle and the wing plate are integrally formed.

7. The liquid distributor according to any one of claims 1 to 5, wherein The liquid distribution plate includes a liquid distribution area and air return areas distributed on both sides of the liquid distribution area, and the air return areas are provided with the air return holes; wherein, the liquid film baffle is arranged on the wing plate and extends downwardly and inclinedly towards the air return area; and / or, The liquid film baffle is arc-shaped, bent or V-shaped; and / or, The liquid distributor further includes a gravity box provided with a plurality of liquid distribution holes, and the liquid distribution holes include flanges turned over towards the gravity direction.

8. A falling film evaporator, characterized in that, The falling film evaporator includes: A shell; Heat exchange tubes arranged in the shell; The liquid distributor according to any one of claims 1 to 7, arranged above the heat exchange tubes, wherein the wing plate extends between the heat exchange tubes and the liquid distribution plate.

9. The falling film evaporator according to claim 8, wherein There is a first air flow channel between the liquid distributor and the shell, and the falling film evaporator further includes a filter demister arranged in the first air flow channel; and / or, In the vertical direction, the heat exchange tubes are divided into a plurality of falling film areas, and a second air flow channel is arranged between two adjacent falling film areas.

10. An air conditioner, characterized in that, The air conditioner includes the falling film evaporator according to claim 8 or 9.

Images