Liquid distributor, liquid spreader, falling film heat exchanger and air conditioning unit

Abstract

The present invention provides a liquid distributor, a liquid spreading device, a falling film heat exchanger and an air conditioner unit, which relate to the field of heat exchange and solve the technical problem that when a liquid distributor plate is used in an evaporator to distribute liquid refrigerant, it is easily affected by gaseous refrigerant. The liquid distributor includes a liquid distributor body and a condensation assembly located inside the liquid distributor body. At least part of the gaseous refrigerant entering the liquid distributor body along with the liquid refrigerant can pass through the condensation assembly, and the condensation assembly is used to contact the gaseous refrigerant and form it into liquid droplets. In this device, at least part of the gaseous refrigerant entering the liquid distributor body along with the liquid refrigerant can pass through the condensation assembly and contact the condensation assembly to form liquid droplets, reducing the amount of gaseous refrigerant mixed in the liquid refrigerant and realizing the separation of the liquid refrigerant and the gaseous refrigerant. Moreover, the condensation of the gaseous refrigerant increases the total amount of the liquid refrigerant, ensuring that a uniform and stable liquid film is formed on the surface of the heat exchange tube, and the liquid distribution effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and in particular to a liquid distributor, a liquid distributor, a falling film heat exchanger and an air conditioner unit. Background Art

[0002] Evaporators and condensers are important components in air conditioner units. Generally, the gaseous refrigerant evaporated by the evaporator enters the compressor, and then the gaseous refrigerant is discharged from the compressor to the condenser for condensation. The condensed refrigerant returns to the evaporator through a throttling device to complete a refrigeration cycle. Common evaporators in current air conditioner units include flooded evaporators, dry evaporators, falling film evaporators, etc. In recent years, due to its own advantages, the falling film evaporator has been widely used in units, and its role in improving the energy efficiency of the unit and saving costs has become increasingly obvious.

[0003] Different from the flooded evaporator, the falling film evaporator realizes heat exchange by evenly distributing the liquid refrigerant onto the surface of the heat exchange tubes through a refrigerant distribution structure. The required refrigerant filling amount is much less than that of the flooded evaporator, greatly reducing costs and saving resources. To distribute the refrigerant onto the surface of the heat exchange tubes to achieve the falling film effect, the liquid distributor is an important component in this process. Common liquid distributors are mainly composed of an inlet pipe, an upper cover plate, and a perforated liquid distribution plate as a whole. The refrigerant enters the liquid distributor from the inlet, and then the liquid distribution plate in the liquid distributor evenly distributes the refrigerant onto the heat exchange tubes. Existing liquid distributors generally have two layers of liquid distributors.

[0004] The applicant of the present invention has found that the prior art has at least the following technical problems:

[0005] On the one hand, in actual working conditions, the refrigerant entering the liquid distributor is in a gas-liquid mixed state. When the refrigerant enters the interior of the liquid distributor, under the interference of the flowing gaseous refrigerant, the distribution of the liquid refrigerant on the liquid distribution plate is poor. Coupled with factors such as deformation and poor flatness caused by the processing of the liquid distribution plate, the liquid distribution effect and assembly efficiency of the liquid distribution plate are reduced.

[0006] On the other hand, the liquid distributor as a whole is placed inside the heat exchanger. When the heat exchanger is used as a condenser, the overall structure of the liquid distributor blocks the gaseous refrigerant entering the condenser, and it is difficult for the gas to reach the heat exchange tubes. Only a small amount of gaseous refrigerant reaches the heat exchange tubes, and the gaseous refrigerant distributed on the heat exchange tubes is also uneven. Moreover, when the gaseous refrigerant reaches both sides of the liquid distributor, after passing through the liquid baffle and then reaching the heat exchange tubes for heat exchange, the condensed liquid refrigerant is easily affected by the airflow near the liquid baffle, resulting in uneven heat exchange on the surface of the heat exchange tubes. Therefore, it is very difficult for existing liquid distributors to distribute gaseous refrigerant in condensers.

[0007] In summary, the gas-liquid separation effect of the liquid distributor for the falling film evaporator in the prior art is not obvious, which easily leads to the distribution of the liquid refrigerant being affected by the gaseous refrigerant. Moreover, the processing and assembly errors of the integral liquid distribution plate are large, and deformation is likely to occur, which is also not conducive to liquid distribution. The liquid distributor with the overall structure results in poor heat exchange effect when the shell-and-tube is used as a condenser. Summary of the Invention

[0008] The purpose of the present invention is to provide a liquid distributor, a liquid distributor, a falling film heat exchanger and an air conditioner unit to solve the technical problem in the prior art that the liquid distribution plate for the evaporator is easily affected by the gaseous refrigerant when distributing the liquid refrigerant; the preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described in detail below.

[0009] To achieve the above purpose, the present invention provides the following technical solutions:

[0010] A liquid distributor provided by the present invention includes a liquid distributor body and a condensation component located inside the liquid distributor body, wherein:

[0011] At least part of the gaseous refrigerant entering the liquid distributor body along with the liquid refrigerant can pass through the condensation component, and the condensation component is used to contact the gaseous refrigerant and form it into droplets.

[0012] Preferably, the liquid distributor body includes a housing, and there is a liquid inlet hole on the housing that allows the refrigerant to enter.

[0013] Preferably, the condensation component is located between the liquid inlet hole and the liquid distribution structure for distributing the liquid refrigerant, and is arranged close to the side of the liquid inlet hole.

[0014] Preferably, there is a contraction area on the housing that narrows in the direction close to the liquid inlet hole, and the condensation component is arranged on the contraction area.

[0015] Preferably, the condensation component is a baffle, the baffle is located on two opposite side walls of the liquid distributor body, and the multiple baffles on the two opposite side walls are arranged staggered with each other.

[0016] Preferably, there is also an exhaust structure on the liquid distributor body, and the exhaust structure is used to discharge the uncondensed gaseous refrigerant from the liquid distributor body.

[0017] Preferably, the exhaust structure is an exhaust hole arranged on the peripheral wall of the liquid distributor body, and the exhaust hole is located below the condensation component.

[0018] Preferably, the liquid distributor body includes a housing, and the housing includes a top plate and a side plate connected thereto, wherein:

[0019] The side plates are located below the top plate. There are liquid inlet holes on the top plate that allow the refrigerant to enter. The condensation assembly and the exhaust structure are located on the side plates, and the position of the exhaust structure on the side plates is lower than the position of the condensation assembly on the side plates.

[0020] Preferably, there are liquid distribution holes evenly arranged along the length direction at the bottom of the liquid distributor body, which are used to evenly distribute the liquid refrigerant to the heat exchange tubes.

[0021] The present invention also provides a liquid distributor, which includes a liquid inlet part and the above-mentioned liquid distributor, and the liquid inlet part is connected to all the liquid distributors.

[0022] Preferably, a gaseous refrigerant passage is defined between the liquid distributors. When the liquid distributor is located in the condenser, the gaseous refrigerant passage is used for the gaseous refrigerant to pass through and flow onto the heat exchange tubes.

[0023] Preferably, the liquid distributors are evenly arranged in the liquid distributor so that the formed gaseous refrigerant passage evenly distributes the gaseous refrigerant to the heat exchange tubes.

[0024] The present invention also provides a falling film heat exchanger, which includes heat exchange tubes and the above-mentioned liquid distributor. The liquid distributor is located above the heat exchange tubes and is used to evenly distribute the refrigerant to the heat exchange tubes.

[0025] Preferably, there is a liquid blocking plate at the lower part of the liquid distributor to block the liquid refrigerant from flowing out of the heat exchanger. The liquid blocking plate is located on both sides of the heat exchange tubes.

[0026] The present invention also provides an air conditioning unit, which includes the above-mentioned falling film heat exchanger.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. When the liquid distributor provided by the present invention is used in an evaporator, at least part of the gaseous refrigerant that enters the liquid distributor body along with the liquid refrigerant can pass through the condensation assembly and contact the condensation assembly to be condensed into liquid droplets through condensation, reducing the amount of gaseous refrigerant mixed in the liquid refrigerant and realizing the separation of the liquid refrigerant and the gaseous refrigerant; and while the gaseous refrigerant condenses in the liquid distributor body, the total amount of the liquid refrigerant is increased. The refrigerant liquid droplets formed after condensation and the liquid refrigerant that initially enters the liquid distributor body can be distributed by the liquid distributor body to the surface of the heat exchange tubes, ensuring that a uniform and stable liquid film is formed on the surface of the heat exchange tubes, and the liquid distribution effect is good.

[0029] 2. The liquid distributor provided by the present invention, due to having the above-mentioned liquid distributor, also has the advantages of being able to realize the gas-liquid separation of the refrigerant, increasing the total amount of the liquid refrigerant, and improving the liquid distribution effect.

[0030] 3. The falling film heat exchanger provided by the present invention can achieve uniform distribution of the refrigerant on the surface of the heat exchange tubes due to the above-mentioned liquid distributor, and has the advantage of good heat exchange effect.

[0031] 4. The air conditioner unit provided by the present invention also has the advantage of good heat exchange effect due to the above-mentioned falling film heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 is a schematic structural diagram of the falling film heat exchanger of the present invention;

[0034] Figure 2 is a three-dimensional structural diagram of the liquid distributor of the present invention;

[0035] Figure 3 is a front sectional view of the liquid distributor of the present invention;

[0036] Figure 4 is a side sectional view of the liquid distributor;

[0037] Figure 5 is a schematic structural diagram of the liquid equalizer of the present invention from the first perspective;

[0038] Figure 6 is a schematic structural diagram of the liquid equalizer of the present invention from another perspective;

[0039] Figure 7 is a front view of the liquid equalizer;

[0040] Figure 8 is a side view of the liquid equalizer.

[0041] In the figure, 1 is the liquid distributor; 10 is the liquid equalizer; 101 is the housing; 1011 is the contraction area; 1012 is the top plate; 1013 is the side plate; 102 is the baffle; 103 is the liquid inlet hole; 104 is the liquid equalizing hole; 105 is the exhaust hole; 11 is the liquid inlet box; 111 is the liquid inlet; 12 is the sealing plate; 13 is the gaseous refrigerant channel;

[0042] 2 is the heat exchange tube; 3 is the liquid inlet pipe; 4 is the liquid baffle; 5 is the tube sheet; 6 is the heat exchanger housing; 7 is the liquid outlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative work fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] Embodiment 1

[0046] See Figures 5 - 8 As shown, this embodiment provides a liquid distributor 10, which can be applied to distribute refrigerant in the liquid distributor 1. It includes a liquid distributor body and a condensation component located inside the liquid distributor body, where: at least part of the gaseous refrigerant entering the liquid distributor body along with the liquid refrigerant can pass through the condensation component, and the condensation component is used to contact the gaseous refrigerant and form it into droplets; wherein, the liquid distributor body is used to evenly distribute the liquid refrigerant therein to the heat exchange tubes.

[0047] When the liquid distributor 10 provided in this embodiment is used in an evaporator, at least part of the gaseous refrigerant entering the liquid distributor body along with the liquid refrigerant can pass through the condensation component, contact the condensation component, and form droplets through condensation, reducing the amount of gaseous refrigerant mixed in the liquid refrigerant and achieving the separation of the liquid refrigerant and the gaseous refrigerant; and while the gaseous refrigerant condenses in the liquid distributor body, the total amount of the liquid refrigerant is increased, and the refrigerant droplets formed after condensation and the liquid refrigerant initially entering the liquid distributor body can be distributed by the liquid distributor body to the surface of the heat exchange tubes, ensuring that a uniform and stable liquid film is formed on the surface of the heat exchange tubes, and the liquid distribution effect is good.

[0048] In the prior art, the liquid distribution plate in the liquid distributor 1 is usually a liquid distribution plate including a plurality of holes. In actual working conditions, the refrigerant entering the liquid distributor 1 is in a gas-liquid mixed state. When the refrigerant enters the interior of the liquid distributor 1, under the interference of the flowing gaseous refrigerant, the distribution of the liquid refrigerant on the liquid distribution plate is poor. Coupled with factors such as deformation and poor flatness caused by the processing of the liquid distribution plate, the liquid distribution effect and assembly efficiency of the liquid distribution plate are reduced.

[0049] In view of the above problems, as an alternative implementation, refer to Figure 5 and Figure 6 As shown, the liquid distributor body in this implementation includes a housing 101, and there is a liquid inlet hole 103 on the housing 101 that allows the refrigerant to enter.

[0050] In this embodiment, a housing structure is adopted instead of a plate-like structure. When the refrigerant enters the housing 101, it is convenient for the gaseous refrigerant to form droplets in the housing 101 through the condensation component, increasing the total amount of liquid refrigerant in the housing 101. Moreover, the liquid distributor body structure of the housing 101 is relatively compact, and compared with the plate structure, the deformation amount is very small during the production and processing process. Therefore, the influence on the assembly and liquid distribution effect can be greatly reduced.

[0051] As an alternative implementation, refer to Figure 5 、 Figure 6 and Figure 7 As shown, the condensation component is located between the liquid inlet hole 103 and the liquid distribution structure for distributing the liquid refrigerant, and is arranged closer to the side of the liquid inlet hole 103.

[0052] Specifically, as shown in Figure 5 , the liquid distribution structure on the housing 101 for evenly distributing the liquid refrigerant to the heat exchange tubes is located at the bottom of the housing 101, the liquid inlet hole 103 is located at the top of the housing 101, the condensation component is located below the liquid inlet hole 103, and is arranged closer to the liquid inlet hole 103 than the liquid distribution structure at the bottom of the housing 101; the specific distance between the condensation component and the liquid inlet hole 103 is not limited. As long as the gaseous refrigerant can contact the condensation component as soon as it enters the liquid distributor body to be condensed into droplets as soon as possible, those skilled in the art can set it specifically according to the actual situation. The above structure is arranged to prevent the refrigerant from escaping as soon as it enters the liquid distributor body, facilitating the gaseous refrigerant to condense into droplets to a certain extent on the condensation component. While separating the gas and liquid, the total amount of liquid refrigerant is increased.

[0053] To further facilitate the condensation of the gaseous refrigerant into droplets, as an alternative implementation, refer to Figures 5 - 7 As shown, there is a constriction area 1011 on the housing 101 that narrows in the direction closer to the liquid inlet hole 103, and the condensation component is arranged on the constriction area 1011.

[0054] In this embodiment, the constriction area 1011 of the housing 101 is wider at the bottom and narrower at the top, which can allow the liquid refrigerant to adhere well to the inner wall and flow down along the inner wall, so that the liquid refrigerant will not escape with the gaseous refrigerant, and at the same time, it is convenient for the gaseous refrigerant to contact the inner wall of the constriction area 1011 for condensation.

[0055] As an alternative implementation, there is a liquid distribution area at the lower part of the constriction area 1011, and the liquid distribution area forms a receiving space larger than the constriction area 1011 to facilitate the flow of the liquid refrigerant. As shown in Figures 5 - 7As shown, the contraction area 1011 in this embodiment is a trapezoidal structure, the liquid distribution area is a rectangular structure, and the liquid equalizer 10 as a whole is a hexagonal structure that is narrow at the top and wide at the bottom. The contraction area 1011 and the side wall of the liquid distribution area are connected, see Figure 5 As shown, the folding angle α between the two is generally selected as α = 120°-160°

[0056] As an alternative embodiment, see Figures 5 - 7 As shown, the condensation component is a baffle 102, and the baffle 102 is located on two opposite side walls of the liquid equalizer body, and the multiple baffles 102 on the two opposite side walls are arranged alternately with each other.

[0057] For details, see Figures 5 - 7 The shell 101 includes two opposite side walls, and the baffle 102 includes a left baffle and a right baffle respectively connected to the inside of the two opposite side walls of the shell 101. Either the left baffle or the right baffle extends in a direction close to the other, and the left baffle and the right baffle are arranged alternately with each other. A flow space allowing liquid refrigerant to pass through is formed between the left baffle and the right baffle, so that the liquid refrigerant can flow downward.

[0058] The structural arrangement of the baffles 102 facilitates the deflection of the gaseous refrigerant between the staggered baffles 102, so that the gaseous refrigerant can more fully contact the baffles 102, thereby reducing the discharge of the gaseous refrigerant, increasing the liquid refrigerant, and saving costs.

[0059] like Figure 4 As shown, the thickness T of each baffle 102 in the liquid equalizer body is preferably 1.5 mm to 5 mm, and the spacing between the baffles 102 along the extension direction of the liquid equalizer body is preferably L 3 =40mm-55mm.

[0060] In this embodiment, the above-mentioned condensation component is a primary gas-liquid separation structure, which can reduce the amount of gaseous refrigerant mixed in the liquid refrigerant by condensing the gaseous refrigerant into liquid droplets, prevent the gaseous refrigerant from disturbing the liquid refrigerant, achieve the separation of the two, and increase the total amount of liquid refrigerant in the shell 101.

[0061] Furthermore, as an optional implementation, there is an exhaust structure on the liquid homogenizer body, and the exhaust structure is used to discharge the uncondensed gaseous refrigerant out of the liquid homogenizer body.

[0062] For details, see Figures 5 - 7 As shown, the exhaust structure is an exhaust hole 105 disposed on the side wall of the shell 101 , and the exhaust holes 105 are evenly arranged on both side walls of the shell 101 .

[0063] As the above exhaust structure serves as a secondary gas-liquid separation structure, it enables the gaseous refrigerant that has not formed droplets to escape from the housing 101 through the exhaust holes 105, further separating the gaseous refrigerant and the liquid refrigerant.

[0064] As an optional implementation, refer to Figures 5 - 8 As shown, the exhaust structure is the exhaust holes 105 provided on the peripheral wall of the liquid distributor body, and the exhaust holes 105 are located at the lower part of the condensation assembly.

[0065] Preferably, a plurality of exhaust holes 105 are arranged at intervals along the length direction of the housing 101.

[0066] Preferably, as Figure 5 shown, the structure of the exhaust holes 105 is arranged closely following the lower part of the condensation assembly, so that the gaseous refrigerant that has not formed droplets can be discharged from the housing 101 through the exhaust holes 105 in time, preventing the uncondensed gaseous refrigerant from being mixed in the liquid refrigerant for too long, which affects the uniform distribution of the liquid refrigerant.

[0067] Preferably, the above exhaust holes 105 are provided on both side walls of the contraction area 1011, facilitating the discharge of the gaseous refrigerant. Preferably, in this embodiment, the position of the baffle 102 for condensing the gaseous refrigerant on both side walls of the contraction area 1011 is generally between the exhaust holes 105 and the liquid inlet holes 103.

[0068] To further optimize the above exhaust effect, refer to Figure 6 shown, the above exhaust holes 105 are long strip holes, and their length dimension w and width dimension t preferably have an interval of w = 5 mm - 10 mm, t = 1 mm - 3 mm, and the hole pitch L of the exhaust holes 105 2 is preferably L 2 = 15 mm - 25 mm.

[0069] The exhaust holes 105 are opened at the middle position of the contraction area 1011 (the middle of the side wall of the trapezoidal structure) and are arrayed along the length direction of the housing 101.

[0070] As an alternative implementation, refer to Figure 4 shown, the liquid distributor body includes a housing 101, and the housing 101 includes a top plate 1012 and side plates 1013 connected thereto, where: the side plates 1013 are located below the top plate 1012, there are liquid inlet holes 103 on the top plate 1012 that allow the refrigerant to enter, the condensation assembly (baffle 102) and the exhaust holes 105 are located on the side plates 1013, and the position of the exhaust holes 105 on the side plates 1013 is lower than the position of the baffle on the side plates 1013.

[0071] Specifically, as Figure 4In this case, since the refrigerant is distributed to the surface of the heat exchange tubes at the lower part through the liquid distributor body, in this embodiment, the arrangement in which the positions of the liquid inlet hole 103, the baffle 102, and the exhaust hole 105 on the housing 101 decrease in sequence is convenient for the gaseous refrigerant to contact the baffle 102 first and condense into droplets after entering through the liquid inlet hole 103 together with the liquid refrigerant, and then the uncondensed gaseous refrigerant is discharged through the exhaust hole 105, separating the gaseous refrigerant and the liquid refrigerant while increasing the total amount of the liquid refrigerant.

[0072] As an alternative embodiment, refer to Figure 5 and Figure 6 As shown, there are liquid distribution holes 104 uniformly arranged along the length direction at the bottom of the liquid distributor body for uniformly distributing the liquid refrigerant to the heat exchange tubes.

[0073] The liquid refrigerant entering the housing 101 reaches the liquid distribution holes 104 at the bottom through the condensation assembly, and the gaseous refrigerant forms droplets when encountering the condensation assembly (or escapes through the exhaust hole 105). All the liquid refrigerant existing in the above-mentioned housing 101 can reach the position of the liquid distribution holes 104 and is uniformly distributed to the surface of the heat exchange holes through the liquid distribution holes 104 to form a uniform and stable liquid film.

[0074] To achieve efficient liquid distribution and heat exchange of the falling film heat exchanger, as Figure 8 shown, the preferred range of the diameter d 2 of the liquid distribution holes 104 is d 2 = 1.5 mm - 3 mm, and the preferred range of the distance L 1 between the liquid distribution holes 104 is L 1 = 18 mm - 25 mm.

[0075] Embodiment 2

[0076] Refer to Figures 1 - 4 As shown, this embodiment provides a liquid distributor 1, including a liquid inlet part and a plurality of the above-mentioned liquid distributors 10, and the liquid inlet part is connected to all the liquid distributors 10.

[0077] The liquid distributor 1 provided in this embodiment, due to having the above-mentioned liquid distributor 10, also has the advantages of being able to achieve gas-liquid separation of the refrigerant, increasing the total amount of the liquid refrigerant, and improving the liquid distribution effect.

[0078] Refer to Figures 1 - 4 As shown, the liquid inlet part is a liquid inlet box 11 with a liquid inlet. The upper part of the liquid inlet box 11 is connected to the liquid inlet pipe 3 through the liquid inlet 111 ( Figure 1 ), and there is a liquid outlet at the bottom of the liquid inlet box 11 for connecting to the liquid inlet hole 103 of the liquid distributor 10. Among them, both ends of the liquid distributor 10 are sealed by sealing plates 12, and the liquid inlet box 11 can be fixed on any one of the sealing plates 12.

[0079] In this embodiment, the liquid refrigerant enters the liquid distributor 1 through the structure of the liquid inlet box 11 described above, so as to facilitate the uniform distribution of the refrigerant.

[0080] Since the overall structure of the liquid distributor 1 in the prior art blocks the gaseous refrigerant, the gaseous refrigerant distributed on the heat exchange tube bundle is very uneven. Therefore, it is very difficult to apply the liquid distributor 1 in the prior art to condense and distribute the gaseous refrigerant.

[0081] To solve the above problems, this embodiment provides a liquid distributor 1 applicable to a condenser. As an alternative embodiment, refer to Figure 2 As shown, a gaseous refrigerant passage 13 is defined between the liquid distributors 10. When the liquid distributor 1 is located in the condenser, the gaseous refrigerant passage 13 is used for the gaseous refrigerant to pass through and flow onto the heat exchange tubes.

[0082] Refer to Figure 2 As shown, Figure 2 The solid arrow direction in shows the position where the liquid refrigerant enters the liquid distributor 1 when used in the evaporator, and the dotted arrow direction shows the position where the gaseous refrigerant enters the liquid distributor 1 when used in the condenser. As shown in Figure 2 and Figure 3 , there is a gap (the width of the gap is not limited) between the outer walls of two adjacent liquid distributors in this embodiment. This gap allows the gaseous refrigerant to enter and conduct with the surface of the heat exchange tube, forming the above-mentioned gaseous refrigerant passage 13.

[0083] The structure of the above-mentioned gaseous refrigerant passage 13 facilitates the smooth passage of the gaseous refrigerant and prevents the body of the liquid distributor 1 from affecting the flow of the gaseous refrigerant.

[0084] As an alternative embodiment, refer to Figure 2 As shown, the liquid distributors 10 are evenly arranged in the liquid distributor 1 so that the formed gaseous refrigerant passage 13 evenly distributes the gaseous refrigerant onto the heat exchange tubes.

[0085] Specifically, refer to Figure 2 and Figure 3 , since the gaseous refrigerant is distributed to the surface of the lower heat exchange tubes through the body of the liquid distributor, and its flow direction is from top to bottom. Therefore, the liquid distributors 10 in this embodiment are evenly arranged in the horizontal direction, so that the gaseous refrigerant passages 13 formed between the multiple liquid distributors 10 are evenly arranged, facilitating the gaseous refrigerant to be evenly distributed onto the surface of the heat exchange tubes through here, thereby realizing the application of the liquid distributor 1 in the condenser. In actual use, the arrangement direction of the multiple liquid distributors 10 can also be adjusted according to the target flow direction of the gaseous refrigerant. This embodiment is only one specific embodiment. The liquid distributor 1 of this embodiment can be applied in both the evaporator and the condenser, improving its scope of use.

[0086] Embodiment 3

[0087] This embodiment provides a falling film heat exchanger, see Figure 1 As shown, it includes heat exchange tubes 2 and the above-mentioned liquid distributor 1 located in the heat exchanger shell 6. The liquid distributor 1 is located on the upper part of the heat exchange tube 2 and is used to evenly distribute the refrigerant to the heat exchange tube 2. The heat exchanger shell 6 is located in the space formed by the tube sheet 5.

[0088] The falling film heat exchanger provided in this embodiment, because it is provided with the above-mentioned liquid distributor 1, can realize that the refrigerant is evenly distributed on the surface of the heat exchange tube 2, and has the advantage of good heat exchange effect.

[0089] As an alternative embodiment, see Figure 1 As shown, there is a liquid baffle 4 at the lower part of the liquid distributor 1 for blocking the liquid refrigerant from flowing out of the heat exchanger, and the liquid baffle 4 is located on both sides of the heat exchange tube 2.

[0090] When used in the evaporator, the liquid refrigerant flowing into the heat exchanger will cause a portion of the mixed gaseous refrigerant to carry the liquid refrigerant into the compressor. By setting a liquid baffle 4 to block the liquid refrigerant, it can play a good role in separating the gaseous and liquid refrigerants. The liquid refrigerant after heat exchange can be discharged through the liquid outlet pipe 7 at the bottom.

[0091] The falling film heat exchanger of this embodiment can have the functions of both an evaporator and a condenser under heat pump working conditions.

[0092] Example 4

[0093] This embodiment provides an air conditioning unit, comprising the falling film heat exchanger. Since the air conditioning unit is provided with the falling film heat exchanger, it also has the advantage of good heat exchange effect.

[0094] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0095] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A liquid distributor, characterized in that, it includes a liquid distributor body and a condensation component located inside the liquid distributor body, wherein: At least part of the gaseous refrigerant entering the liquid distributor body along with the liquid refrigerant can pass through the condensation component, and the condensation component is used to contact the gaseous refrigerant and form it into droplets; The liquid distributor body includes a housing, and there is a liquid inlet hole on the housing that allows the refrigerant to enter; The condensation component includes baffles, the baffles are located on two opposite side walls of the liquid distributor body, and the multiple baffles on the two opposite side walls are arranged staggered with each other; The baffle includes a left baffle and a right baffle respectively connected to the inside of two opposite side walls of the housing. Either one of the left baffle and the right baffle extends in the direction close to the other, and the left baffle and the right baffle are arranged staggered with each other. A flow space allowing the liquid refrigerant to pass through is formed between the left baffle and the right baffle to facilitate the downward flow of the liquid refrigerant; There is also an exhaust structure on the liquid distributor body, and the exhaust structure is used to discharge the uncondensed gaseous refrigerant from the liquid distributor body; the exhaust structure is an exhaust hole provided on the peripheral wall of the liquid distributor body, and the exhaust hole is located below the condensation component; There are liquid distribution holes evenly arranged along the length direction at the bottom of the liquid distributor body for evenly distributing the liquid refrigerant to the heat exchange tubes.

2. The liquid distributor according to claim 1, characterized in that, The condensation component is located between the liquid inlet hole and the liquid distribution structure for distributing the liquid refrigerant, and is arranged close to the side of the liquid inlet hole.

3. The liquid distributor according to claim 1, characterized in that, There is a contraction area on the housing that narrows in the direction close to the liquid inlet hole, and the condensation component is arranged on the contraction area.

4. The liquid distributor according to claim 1, characterized in that, The liquid distributor body includes a housing, and the housing includes a top plate and a side plate connected thereto, wherein: The side plate is located below the top plate, there is a liquid inlet hole on the top plate that allows the refrigerant to enter, the condensation component and the exhaust structure are located on the side plate, and the position of the exhaust structure on the side plate is lower than the position of the condensation component on the side plate.

5. A liquid distributor, characterized in that, it includes a liquid inlet part and a plurality of liquid distributors according to any one of claims 1-4, and the liquid inlet part is connected to all the liquid distributors.

6. The liquid distributor according to claim 5, characterized in that, A gaseous refrigerant channel is defined between the liquid distributors. When the liquid distributor is located in the condenser, the gaseous refrigerant channel is used for the gaseous refrigerant to pass through and flow onto the heat exchange tubes.

7. The liquid distributor according to claim 6, characterized in that, The liquid distributors are evenly arranged in the liquid distributor so that the formed gaseous refrigerant channel evenly distributes the gaseous refrigerant to the heat exchange tubes.

8. A falling film heat exchanger, characterized in that, it includes heat exchange tubes and a liquid distributor according to any one of claims 5-7, and the liquid distributor is located above the heat exchange tubes for evenly distributing the refrigerant to the heat exchange tubes.

9. The falling film heat exchanger according to claim 8, wherein, a liquid baffle for blocking the liquid refrigerant from flowing out of the heat exchanger exists at the lower part of the liquid distributor, and the liquid baffle is located on both sides of the heat exchange tubes.

10. An air conditioning unit, wherein, it includes the falling film heat exchanger according to claim 8 or 9.

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