Water-cooled heat exchanger and assembly thereof

Abstract

The utility model discloses a water-cooled heat exchanger and an assembly thereof. The water-cooled heat exchanger comprises flat pipes, radiating fins, partition plates and protective plates. In the heat exchange process, cooling water firstly flows in the horizontal direction, is pushed up by water pressure to vertically flow upwards when moving to the tail end of the partition plate, horizontally flows in the opposite direction after flowing to the position above the partition plate, and finally is output to the outside of the heat exchanger. Cooling water is bent and overflows upwards, so that efficient and sufficient heat dissipation can be achieved. The flat pipes are transversely arranged in the width direction, so that the thickness of the water-cooled heat exchanger is remarkably reduced, a thin flat plate-shaped structure is formed, the water-cooled heat exchanger is smaller in size and high in miniaturization degree, and a plurality of water-cooled heat exchangers can be tightly stacked in the thickness direction to be combined together to form a heat dissipation assembly. And the assembly is high in structure compactness, small in thickness after being stacked, low in space occupancy rate and beneficial to being applied to the technical fields of automobile air conditioners and the like with high requirements for the size and compactness.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange equipment field, concretely relates to a water -cooled heat exchanger and the assembly including this water -cooled heat exchanger. BACKGROUND

[0002] The function of the automobile condenser is to complete the heat exchange of the refrigeration system, and it is used as a heat dissipation device in the automobile air conditioner, which converts the high-temperature and high-pressure gas from the compressor into medium-temperature and high-pressure liquid. The automobile air conditioner condenser belongs to a kind of heat exchanger, which can convert gas or steam into liquid and conduct the heat of the refrigerant in the pipe to the air near the pipe.

[0003] At present, in the commercial refrigeration system, the conventional water-cooled condenser mainly adopts a tube plate type (shell and tube type) structure, which is composed of a shell, a heat transfer tube bundle, a tube plate, a baffle plate and a tube box and other components. The shell is a cylindrical structure, and the inside of the cylinder is a closed cavity, in which a plurality of tube bundles are arranged, and the two ends of the tube bundle are fixed on the tube plate. Two kinds of fluids for heat exchange, one flows in the tube bundle, called tube-side fluid, and the other flows in the shell outside the tube bundle, called shell-side fluid. The tube-side fluid and the shell-side fluid realize the heat exchange through the wall surface of the tube bundle as the heat transfer surface.

[0004] In the application of automobile accessories, especially automobile air conditioner, the condenser has high requirements for miniaturization and compactness due to the limited installation space and load requirements. Otherwise, its installation and application are difficult to realize. The application of structures such as shell and tube heat exchanger with large volume, heavy weight and high cost has great disadvantages. At present, there are also some water-cooled condensers with plate-fin structure, although their volume and weight are relatively small, but their structure compactness and heat dissipation performance are still insufficient when applied to automobile condensers. The insufficient heat dissipation performance further leads to the selection of larger size, resulting in high volume and high space occupancy rate of automobile air conditioner. UTILITY MODEL CONTENTS

[0005] To overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a water-cooled heat exchanger, and the other purpose is to provide an assembly including the water-cooled heat exchanger, which can solve the problems of insufficient structure compactness and poor heat dissipation performance of the existing water-cooled condenser applied in the field of automobile.

[0006] The utility model realizes the following technical solutions:

[0007] A water-cooled heat exchanger comprises: a plurality of flat tubes arranged in a row along the width direction of the flat tubes; a plurality of heat dissipation fins closely arranged on the outer side walls of the flat tubes; a partition plate attached to the outer side walls of the flat tubes; one end of the partition plate flushes with one end of the flat tube row, and the other end of the flat tube row protrudes from the other end of the partition plate; the partition plate is arranged on the central axis in the length direction of the flat tube row to separate the heat dissipation fins above the partition plate from the heat dissipation fins below the partition plate, so that the flow channels connected by the heat dissipation fins on the same side form a "U"-shaped flow channel structure; a guard plate covers the outer side of the heat dissipation fins; the flat tube has a plurality of micro-channels for passing a first medium; the flow channel structure formed by the heat dissipation fins is used for passing a second medium, so that the first medium and the second medium exchange heat through the side walls of the flat tube.

[0008] Further, the water-cooled heat exchanger further comprises: a first header and a second header; the first header has a header channel and a plurality of first branch interfaces connected to the header channel, the first branch interfaces are used to connect the upper end openings of the flat tubes; the second header has a header channel and a plurality of second branch interfaces connected to the header channel, the second branch interfaces are used to connect the lower end openings of the flat tubes.

[0009] Further, the water-cooled heat exchanger further comprises: an inlet joint and an outlet joint for inputting and outputting the first medium respectively; the two ends of the first header are a closed end and an open end respectively, the inlet joint is connected to the open end of the first header; the two ends of the second header are a closed end and an open end respectively, the outlet joint is connected to the open end of the second header.

[0010] Further, the water-cooled heat exchanger further comprises two side plates, the side plates are provided with an upper mounting hole and a lower mounting hole connected to the heat dissipation fins, the upper mounting hole and the lower mounting hole are located in the upper direction and the lower direction of the partition plate respectively; the guard plate and the side plate jointly cover the outer periphery of the heat dissipation fins.

[0011] Further, the water-cooled heat exchanger further comprises: a water inlet pipe and a water outlet pipe for inputting and outputting the second medium respectively; the water inlet pipe is connected to the lower mounting hole, and the water outlet pipe is connected to the upper mounting hole.

[0012] Further, the flat tube is an aluminum tube.

[0013] Further, the fin wave shape of the heat dissipation fin is a rectangular wave or a V-shaped wave.

[0014] Further, the fin structure of the heat dissipation fin comprises: upper fins and lower fins connected; the upper fins and the lower fins are both rectangular structures and are arranged in pairs with intervals to form a structure of multiple rectangular wave shapes; the two side walls of the upper fins are provided with openings, and the adjacent upper fins form a channel in the form of a groove; the two side walls of the lower fins are provided with openings, and the adjacent lower fins form a channel in the form of a groove.

[0015] Further, the flat tube, the fin, the partition plate, the front and rear protection plates and the left and right side plates are fixed by brazing.

[0016] A water-cooled heat exchanger assembly comprises a plurality of the water-cooled heat exchanger; the plurality of water-cooled heat exchangers are stacked in the thickness direction, and the protection plates between adjacent water-cooled heat exchangers are attached to each other to form the water-cooled heat exchanger assembly by stacking.

[0017] Compared with the prior art, the water-cooled heat exchanger provided by the utility model has the beneficial effects that:

[0018] When working, the first medium is introduced into the channel in the flat tube, and the first medium flows in the flat tube; at the same time, the second medium is introduced into the channel in the heat dissipation fin, and the second medium flows on the outer side wall of the flat tube; the first medium and the second medium realize wall-type heat exchange through the pipe wall of the flat tube, that is, the heat absorption of the refrigerant makes the medium to be cooled (air conditioning cooling water) complete cooling.

[0019] In particular, in the heat exchange process, because the partition plate divides the heat dissipation fins on the same side into upper and lower parts in a certain length distance, the second medium first flows in the horizontal direction, is pushed upward to flow vertically upward when reaching the end of the partition plate, flows in the reverse direction horizontally after reaching the position above the partition plate, and is finally output to the outside of the heat exchanger.

[0020] (1) Through the cooperation of the partition plate and the heat dissipation fin, a flow channel structure similar to a "U" shape is formed outside the flat tube, so that the second medium flows in the horizontal direction, and the second medium to be cooled fully contacts the outer side wall of the flat tube and the heat dissipation fin. Through such bending and upward overflow flow state, high-efficiency and sufficient heat dissipation can be achieved, and the performance of the heat exchanger is obviously improved.

[0021] (2) Compared with the arrangement of the flat tube in the thickness direction in the prior art, the flat tube of the utility model is arranged in the transverse direction in the width direction, and the heat dissipation fins are arranged on the two flat sides of the flat tube, so that the thickness of the water-cooled heat exchanger is significantly reduced, forming a thin flat plate structure, and the volume is smaller, and the degree of miniaturization is high.

[0022] (3) Since the monomer thickness of the water-cooled heat exchanger is small, and the structure is conducive to close adhesion to each other, a plurality of water-cooled heat exchangers can be closely stacked in the thickness direction to form a heat dissipation assembly together. Such an assembly has high compactness, small thickness after stacking, and low space occupancy, which is particularly advantageous for application in technical fields such as automobile air conditioners that have high requirements for volume and compactness. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 1 is a perspective view of a water-cooled heat exchanger;

[0024] Figure 2 Fig. 2 is a side view of a water-cooled heat exchanger;

[0025] Figure 3 Fig. 3 is an exploded view of a water-cooled heat exchanger;

[0026] Figure 4 Fig. 4 is an internal schematic view of a water-cooled heat exchanger;

[0027] Figure 5 Fig. 5 is a sectional view of a water-cooled heat exchanger;

[0028] Figure 6 Fig. 6 is a partial enlarged view of A in Fig. 1; Figure 5

[0029] Figure 7 Fig. 7 is an enlarged view of the fin structure;

[0030] Figure 8 Fig. 8 is a connection schematic view of a header and a flat tube;

[0031] Figure 9 Fig. 9 is a combination schematic view of a water-cooled heat exchanger assembly.

[0032] In the figure: 1, water-cooled heat exchanger; 10, flat tube; 20, heat dissipation fin; 21, upper fin part; 22, lower fin part; 23, opening; 30, partition plate; 40, guard plate; 50, first header; 60, second header; 70, inlet joint; 80, outlet joint; 90, side plate; 100, water inlet pipeline; 110, water outlet pipeline. DETAILED DESCRIPTION

[0033] In the following, the utility model is further described in combination with the drawings and the specific embodiments. It should be noted that the embodiments described below or the technical features between them can be combined to form new embodiments without conflict.

[0034] ​In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0035] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0036] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] Referring to Figures 1-3 The utility model discloses a water -cooled heat exchanger 1, comprising: flat tube 10, fin 20, baffle 30 and guard plate 40. Among them, the quantity many flat tubes 10 are arranged along the width direction of flat tube 10 interval, to form flat tube column, and the fin 20 of several is closely attached on the side wall of both outer sides of each flat tube 10, and the flow channel for fluid is set up in the fin 20. Figures 4-6 , Figure 8 The baffle 30 is also attached to the outer side wall of both outer sides of the flat tube 10, and the one end of the baffle 30 along the length direction is flush with one end of the flat tube column, and the other opposite end of the flat tube column protrudes from the other opposite end of the baffle 30. Figures 3-6 , Figure 8 The baffle 30 is arranged on the central axis in the length direction of the flat tube column, so as to separate the fin 20 above the baffle 30 and the fin 20 below the baffle 30, so as to form a "U" shaped flow channel structure for the flow channel connected with the fin 20 on the same side. The guard plate 40 is arranged on the outer side of the fin 20, so that the medium can flow freely in the fin 20.

[0038] The flat tube 10 has a plurality of micro-channels inside for passing the first medium; the flow channel structure formed by the heat dissipation fins 20 is used for passing the second medium, so that the first medium and the second medium exchange heat through the tube wall of the flat tube 10. In the embodiment, the first medium is refrigerant, and the second medium is cooling water, which is a medium to be cooled at a higher temperature.

[0039] During operation, the first medium is passed into the channels inside the flat tube 10 and flows in the flat tube 10. At the same time, the second medium is passed into the channels of the heat dissipation fins 20 and flows on the outer side wall of the flat tube 10; the first medium and the second medium realize wall-type heat exchange through the tube wall of the flat tube 10, that is, through the heat absorption of the refrigerant, the medium to be cooled (air conditioning cooling water) completes cooling.

[0040] In particular, referring to Figures 4-6 During the heat exchange process, because the partition plate 30 divides the heat dissipation fins 20 on the same side into upper and lower parts at a certain length distance, the second medium first flows in the horizontal direction, is pushed upward to flow vertically upward when reaching the end of the partition plate 30, flows in the reverse direction horizontally after reaching the position above the partition plate 30, and is finally output to the outside of the heat exchanger.

[0041] (1) Through the cooperation of the partition plate 30 and the heat dissipation fins 20, a flow channel structure similar to a "U" shape is formed outside the flat tube 10, so that the second medium flows in the direction, and the second medium to be cooled fully contacts the outer side wall of the flat tube 10 and the heat dissipation fins 20. Through such a bending and upward overflow flow state, high-efficiency and sufficient heat dissipation can be achieved, and the performance of the heat exchanger is obviously improved.

[0042] (2) Compared with the arrangement of the flat tube 10 in the thickness direction in the prior art, the flat tube 10 of the utility model is arranged in the width direction, and the heat dissipation fins 20 are arranged on the two flat sides of the flat tube 10, so that the thickness of the water-cooled heat exchanger 1 is significantly reduced, forming a thin flat plate structure, which has a smaller volume and a higher degree of miniaturization.

[0043] (3) Because the thickness of the water-cooled heat exchanger 1 is small, and the structure is conducive to close adhesion, a plurality of water-cooled heat exchangers 1 can be closely stacked in the thickness direction to form a heat dissipation assembly. Such an assembly has high compactness, small thickness after stacking, and low space occupancy, which is particularly suitable for application in technical fields such as automobile air conditioning that have high requirements for volume and compactness.

[0044] Preferably, referring to Figure 8 , Figure 3The utility model also includes first manifold 50 and second manifold 60. First manifold 50 has a flow channel and a plurality of first sub-flow interfaces in communication with the flow channel, and the first sub-flow interfaces are used for connecting the upper end openings of the flat tubes 10. Similarly, the second manifold 60 also has a flow channel and a plurality of second sub-flow interfaces in communication with the flow channel, and the second sub-flow interfaces are used for connecting the lower end openings of the flat tubes 10. The first manifold 50 serves to uniformly distribute the refrigerant in the flat tubes 10, and the second manifold 60 serves to collect and output the refrigerant in the flat tubes 10.

[0045] Further, referring to Figures 1-2 The utility model also includes an inlet joint 70 and an outlet joint 80 for inputting and outputting the first medium, respectively. The two ends of the first manifold 50 are a closed end and an open end, respectively, and the inlet joint 70 is connected to the open end of the first manifold 50. Similarly, the two ends of the second manifold 60 are a closed end and an open end, respectively, and the outlet joint 80 is connected to the open end of the second manifold 60. The inlet joint 70 and the outlet joint 80 can be used for external pipelines.

[0046] In operation, the first medium is input into the inlet joint 70 through an external pipeline, and the first medium is uniformly distributed into the flat tubes 10 after being input into the first manifold 50. The first medium coming out of the flat tubes 10 is collected in the second manifold 60 and output into a pipeline connected to the outlet joint 80.

[0047] Preferably, referring to Figure 1 and Figure 3 The utility model also includes left and right side plates 90. The side plates 90 are provided with an upper mounting hole and a lower mounting hole in communication with the heat dissipation fins 20, and the upper mounting hole and the lower mounting hole are located in the upper direction and the lower direction of the partition plates 30, respectively. The side plates 90 and the guard plates 40 jointly enclose the outer periphery of the heat dissipation fins 20.

[0048] Further, the utility model also includes an inlet water pipeline 100 and an outlet water pipeline 110 for inputting and outputting the second medium, respectively. The inlet water pipeline 100 is connected to the lower mounting hole, and the outlet water pipeline 110 is connected to the upper mounting hole. In operation, the second medium is input into the inlet water pipeline 100, and the second medium enters the flow channel inside the heat dissipation fins 20 and is output through the outlet water pipeline 110 after heat exchange.

[0049] Preferably, the flat tubes 10 are made of aluminum, which has the characteristics of high strength and light weight.

[0050] Preferably, the fin wave shape of the heat dissipation fins 20 can be a rectangular wave or a V-shaped wave, and of course, it can also be any type of fin wave shape known in the art.

[0051] Referring toFigure 7 In the embodiment, the fin structure of the heat dissipation fins 20 comprises the connected upper fins 21 and lower fins 22. The upper fins 21 and the lower fins 22 are both rectangular and arranged in pairs with intervals, thereby forming a structure of multiple rectangular connections and concave-convex wavy arrangement. The two side walls of the upper fins 21 are provided with openings 23, and the adjacent upper fins 21 form a channel in the form of a groove. The two side walls of the lower fins 22 are also provided with openings 23, and the adjacent lower fins 22 form a channel in the form of a groove. Such fin structure is beneficial to increase the contact area of the fins and the medium, divide and disturb the cavity space, make the fluid flow more uniformly in the cavity, and thereby enhance the heat exchange efficiency.

[0052] Preferably, after the flat tubes 10, the heat dissipation fins 20, the partition plates 30, the front and rear guard plates 40 and the left and right side plates 90 are assembled together, they are brazed in a brazing furnace, so that the components are fixed together. The positions with larger fitting gaps, such as the front and rear guard plates 40 and the left and right side plates 90, are connected and sealed by argon arc welding. Since the heat dissipation fins 20 and the flat tubes 10 are welded by brazing, the heat dissipation area of the flat tubes 10 is increased, and the heat dissipation effect is greatly improved compared with the shell-and-tube heat exchanger.

[0053] Referring to Figure 9 The utility model discloses a water -cooled heat exchanger assembly, including above -mentioned water -cooled heat exchanger 1. Water -cooled heat exchanger assembly is the form of combined use, and multiple water -cooled heat exchanger 1 is stacked along the thickness direction, and the guard plate 40 between adjacent water -cooled heat exchanger 1 is pasted to form water -cooled heat exchanger assembly in the form of stacking. Since the monomer thickness of water -cooled heat exchanger 1 is small, and the shape tends to thin plate, it is favorable to mutual stacking, therefore the assembly stacked has the characteristics of high compactness, small thickness, low space occupancy, and especially is favorable to apply in the technical field of high request to volume and compactness such as automobile air conditioning.

[0054] Any heat exchange assembly using the same or substantially same water -cooled heat exchanger 1 should be within the protection scope of the utility model.

[0055] The above-mentioned embodiments are only preferred embodiments of the utility model, and cannot be used to limit the range of protection of the utility model. Any non-essential change and replacement made by the person skilled in the art on the basis of the utility model belongs to the range of protection required by the utility model.

Claims

1. A water-cooled heat exchanger, characterized by, The water-cooled heat exchanger comprises: a plurality of flat tubes arranged at intervals along the width direction of the flat tubes to form a flat tube column; a plurality of heat dissipation fins closely arranged on the two outer walls of the flat tubes; a partition plate attached to the outer walls of the flat tubes, one end of the partition plate being flush with one end of the flat tube column, and the other end of the flat tube column protruding beyond the other end of the partition plate, the partition plate being arranged on the central axis in the length direction of the flat tube column to separate the heat dissipation fins above the partition plate from the heat dissipation fins below the partition plate, so that the flow channels connected with the heat dissipation fins on the same side form a "U"-shaped flow channel structure; a protective plate arranged on the outer side of the heat dissipation fins; the flat tubes have micro-channels for passing a first medium, and the flow channel structure formed by the heat dissipation fins is used for passing a second medium, so that the first medium and the second medium exchange heat through the tube wall of the flat tube.

2. The water cooled heat exchanger of claim 1, wherein The water-cooled heat exchanger further comprises a first header and a second header. The first header has a header channel and a plurality of first branch interfaces connected to the header channel, and the first branch interfaces are used to connect the upper end openings of the flat tubes. The second header has a header channel and a plurality of second branch interfaces connected to the header channel, and the second branch interfaces are used to connect the lower end openings of the flat tubes.

3. The water cooled heat exchanger of claim 2, wherein The water-cooled heat exchanger further comprises an inlet joint and an outlet joint for inputting and outputting the first medium respectively; the two ends of the first header are a closed end and an open end respectively, and the inlet joint is connected to the open end of the first header; the two ends of the second header are a closed end and an open end respectively, and the outlet joint is connected to the open end of the second header.

4. The water cooled heat exchanger of claim 1 wherein, The water-cooled heat exchanger further comprises two side plates, and the side plates are provided with an upper mounting hole and a lower mounting hole connected to the heat dissipation fins, and the upper mounting hole and the lower mounting hole are arranged in the upper direction and the lower direction of the partition plate respectively; The protective plate and the side plates jointly enclose the outer periphery of the heat dissipation fins.

5. The water cooled heat exchanger of claim 4 wherein, The water-cooled heat exchanger further comprises a water inlet pipeline and a water outlet pipeline for inputting and outputting the second medium respectively; the water inlet pipeline is connected to the lower mounting hole, and the water outlet pipeline is connected to the upper mounting hole.

6. The water cooled heat exchanger of claim 1 wherein, The flat tubes are aluminum tubes.

7. The water cooled heat exchanger of claim 1 wherein, The fin wave shape of the heat dissipation fins is a rectangular wave or a V-shaped wave.

8. The water cooled heat exchanger of claim 7, wherein The fin structure of the heat dissipation fins comprises upper fins and lower fins connected in series; the upper fins and the lower fins are both rectangular structures and are arranged at intervals to form a multi-rectangular wave arrangement; the two side walls of the upper fins are provided with openings, and the adjacent upper fins form a recessed channel; the two side walls of the lower fins are provided with openings, and the adjacent lower fins form a recessed channel.

9. The water cooled heat exchanger of claim 4 wherein, The flat tubes, the fins, the partition plate, the front and rear protective plates, and the left and right side plates are brazed and fixed.

10. A water-cooled heat exchanger assembly, characterized by The water-cooled heat exchanger comprises a plurality of water-cooled heat exchangers as claimed in any one of claims 1 to 9; the water-cooled heat exchangers are stacked along the thickness direction, and the protective plates between adjacent water-cooled heat exchangers are attached to each other to form a water-cooled heat exchanger assembly.

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