Three-stroke heat exchanger structure

Abstract

The utility model discloses a three-pass heat exchanger structure, belongs to the technical field of heat exchangers, and solves the technical problem of insufficient heat exchange of the conventional heat exchanger. The heat exchanger comprises a shell, a plurality of heat conduction pipes are arranged in the shell, gaps between the shell and the heat conduction pipes are hot side medium flowing areas, and the two ends of the shell are provided with flow dividing ribs which divide the heat conduction pipes into a first heat exchange area, a second heat exchange area and a third heat exchange area respectively. One end of the shell is provided with a cold side medium inlet communicated with the first heat exchange area and a hot side medium inlet communicated with the hot side medium flowing area, and the second heat exchange area and the third heat exchange area at the end are communicated; the other end of the shell is provided with a first cold side medium outlet communicating with the first heat exchange area, a cold side medium return opening communicating with the second heat exchange area, a second cold side medium outlet communicating with the third heat exchange area and a hot side medium outlet communicating with the hot side medium flowing area. The heat exchanger is compact in structure and capable of improving the heat exchange rate.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and more specifically, to a three-pass heat exchanger structure. Background Art

[0002] Because marine engines sail on the water, their cooling systems use external water to exchange heat with the coolant inside the engine to dissipate heat. That is, the cooling system is divided into an external circulation water circuit and an internal circulation water circuit. The two water circuits rely on temperature differences to exchange heat in the heat exchanger to take away excess heat. At present, marine engines transfer the heat of high-temperature combustion gases, high-temperature lubricating oil, and high-temperature exhaust gas to the internal circulation coolant, which is then transported to the heat exchanger position; the external circulation coolant is also transported to the heat exchanger position after completing heat exchange with the high-temperature intake air in the intercooler, and after completing heat exchange with the internal circulation coolant, it is discharged from the engine. Generally, one-way or two-way heat exchange is carried out inside the heat exchanger, resulting in a loose structure and insufficient heat exchange. Utility Model Content

[0003] The technical problem to be solved by the utility model is aimed at the above-mentioned deficiencies in the prior art. The purpose of the utility model is to provide a three-pass heat exchanger structure which has a compact structure and can improve the heat exchange rate.

[0004] The technical solution of the utility model is: a three-pass heat exchanger structure, including a shell, a plurality of heat-conducting pipes for cold-side medium to flow through are arranged in the shell, the gap between the shell and the heat-conducting pipes is the hot-side medium flow zone, and the two ends of the shell are respectively provided with diverter ribs for dividing the plurality of heat-conducting pipes into a first heat exchange zone, a second heat exchange zone, and a third heat exchange zone; one end of the shell is provided with a cold-side medium inlet connected to the first heat exchange zone, a hot-side medium inlet connected to the hot-side medium flow zone, and the second heat exchange zone at this end is connected to the third heat exchange zone; the other end of the shell is provided with a first cold-side medium outlet connected to the first heat exchange zone, a cold-side medium return port connected to the second heat exchange zone, a second cold-side medium outlet connected to the third heat exchange zone, and a hot-side medium outlet connected to the hot-side medium flow zone.

[0005] As a further improvement, end covers are respectively provided at both ends of the shell, the cold side medium inlet is provided at the end cover at one end, and the first cold side medium outlet and the cold side medium return port are both provided at the end cover at the other end.

[0006] Furthermore, a plurality of hot side medium flow diversion baffles arranged at intervals are provided in the shell, the hot side medium flow diversion baffles are provided with flow diversion holes, and the flow diversion holes of the hot side medium flow diversion baffles are not on the same straight line.

[0007] Furthermore, the flow diversion holes of each of the hot-side medium flow diversion baffles are arranged in a spiral pattern along the axial direction of the shell.

[0008] Furthermore, the cross-sectional areas of the first heat exchange zone, the second heat exchange zone, and the third heat exchange zone are equal, and the numbers of heat conduction pipes in the first heat exchange zone, the second heat exchange zone, and the third heat exchange zone are equal.

[0009] Furthermore, the cross-sectional area of ​​the diversion hole is equal to the cross-sectional area of ​​the first heat exchange area.

[0010] Furthermore, the diverter rib is a three-pronged structure, and the angle between two adjacent forks is 120°.

[0011] Furthermore, the heat conducting pipe is made of copper material.

[0012] Furthermore, the cold side medium inlet is parallel to the hot side medium inlet.

[0013] Furthermore, the outer wall of the heat conducting pipe is provided with heat conducting fins.

[0014] Beneficial Effects

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The utility model divides the heat transfer pipe into the first heat exchange zone, the second heat exchange zone, and the third heat exchange zone through the flow ribs. After the hot side medium enters the hot side medium flow zone, the cold side medium enters the first heat exchange zone from the cold side medium inlet to exchange heat with the hot side medium once. After the cold side medium flows out from the first cold side medium outlet, it directly returns to the second heat exchange zone from the cold side medium return port, or it can continue to cool other components (such as the intercooler and the oil cooler) and then return to the second heat exchange zone from the cold side medium return port, and then flow from the second heat exchange zone to the third heat exchange zone to achieve secondary and tertiary heat exchange with the hot side medium, thereby increasing the distance and time of heat exchange and improving the heat exchange rate. In addition, the heat exchanger structure of the utility model integrates the first heat exchange zone, the second heat exchange zone, and the third heat exchange zone to achieve three-way heat exchange, and the structure is compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 2 for Figure 1 Cross-sectional view in the LL direction;

[0019] Figure 3 for Figure 1 Cross-sectional view in the MM direction;

[0020] Figure 4 for Figure 1 Sectional view along the NN direction;

[0021] Figure 5 for Figure 1 Cross-sectional view in the RR direction;

[0022] Figure 6 for Figure 1 Sectional view in the SS direction;

[0023] Figure 7 It is a three-dimensional structural cross-sectional view of the utility model;

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the diverter rib in the utility model.

[0026] Wherein: 1-shell, 2-heat conduction pipe, 3-first heat exchange area, 4-second heat exchange area, 5-third heat exchange area, 6-diverter rib, 7-cold side medium inlet, 8-hot side medium inlet, 9-first cold side medium outlet, 10-cold side medium return port, 11-second cold side medium outlet, 12-hot side medium outlet, 13-end cover, 14-hot side medium diverter baffle, 15-diverter hole. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0028] See also Figures 1 to 9 A three-pass heat exchanger structure includes a shell 1, in which a plurality of heat-conducting pipes 2 for cold-side medium to flow through are arranged, and the plurality of heat-conducting pipes 16 are arranged in parallel, and the cold-side medium is, for example, sea water, river water, etc. The gap between the shell 1 and the heat-conducting pipe 2 is a hot-side medium flow area, for hot-side medium to flow through, and the hot-side medium is, for example, antifreeze (coolant), fresh water or lubricating oil. When the hot-side medium flows through the gap between the shell 1 and the heat-conducting pipe 2, its heat is transferred to the cold-side medium through the heat-conducting pipe 2 to achieve cooling. Diverter ribs 6 are respectively arranged at both ends of the shell 1 to divide the plurality of heat-conducting pipes 2 into a first heat exchange area 3, a second heat exchange area 4, and a third heat exchange area 5. A cold-side medium inlet 7 connected to the first heat exchange area 3 and a hot-side medium inlet 8 connected to the hot-side medium flow area are arranged at one end of the shell 1, and the second heat exchange area 4 at this end is connected to the third heat exchange area 5. The other end of the shell 1 is provided with a first cold side medium outlet 9 connected to the first heat exchange zone 3, a cold side medium return port 10 connected to the second heat exchange zone 4, a second cold side medium outlet 11 connected to the third heat exchange zone 5, and a hot side medium outlet 12 connected to the hot side medium flow zone.

[0029] After the hot side medium enters the hot side medium flow area, the cold side medium enters the first heat exchange area 3 from the cold side medium inlet 8 to exchange heat with the hot side medium. After the cold side medium flows out from the first cold side medium outlet 9, it directly returns to the second heat exchange area 4 from the cold side medium return port 10, or it can continue to cool other components (such as the intercooler and the oil cooler) and then return to the second heat exchange area 4 from the cold side medium return port 10, and then flow from the second heat exchange area 4 to the third heat exchange area 5 to achieve secondary and tertiary heat exchange with the hot side medium, which increases the distance and time of heat exchange and can improve the heat exchange rate. In addition, the heat exchanger structure of the utility model integrates the first heat exchange area, the second heat exchange area, and the third heat exchange area to realize three-way heat exchange, and the structure is compact.

[0030] Specifically, end covers 13 are respectively provided at both ends of the housing 1, the cold side medium inlet 7 is provided at the end cover 13 at one end, and the first cold side medium outlet 9 and the cold side medium return port 10 are both provided at the end cover 13 at the other end.

[0031] A plurality of hot side medium flow dividing baffles 14 are arranged at intervals in the housing 1, and the hot side medium flow dividing baffles 14 are provided with flow dividing holes 15, and the flow dividing holes 15 of each hot side medium flow dividing baffle 14 are not on the same straight line. The flow speed of the hot side medium can be slowed down, so that more heat can be exchanged, thereby improving the heat exchange rate.

[0032] Preferably, the flow diversion holes 15 of each hot side medium flow diversion baffle 14 are arranged in a spiral along the axial direction of the shell 1. That is, viewed from the axial direction of the shell 1, the flow diversion holes 15 of each hot side medium flow diversion baffle 14 are arranged in a spiral. The hot side medium enters the heat exchanger from the hot side medium inlet 8, flows in the space between the shell 1 and the outer wall of the heat pipe 2, and flows in the axial spiral under the action of the hot side medium flow diversion baffle 14, so that the hot side medium exchanges heat with the cold side medium in the form of turbulence, thereby increasing the heat transfer efficiency between the hot side medium and the cold side medium, greatly strengthening the heat exchange between the hot side medium and the cold side medium, and improving the cooling efficiency of the cold side medium. After being cooled by the cold side medium, the hot side medium flows out of the heat exchanger through the hot side medium outlet 12.

[0033] Preferably, the cross-sectional areas of the first heat exchange zone 3, the second heat exchange zone 4, and the third heat exchange zone 5 are equal, and the number of heat pipes 2 in the first heat exchange zone 3, the second heat exchange zone 4, and the third heat exchange zone 5 is equal, so that the flow rate of the cold side medium is stable.

[0034] The cross-sectional area of ​​the diverter hole 15 is equal to the cross-sectional area of ​​the first heat exchange area 3 . The diverter rib 6 is a three-pronged structure, and the angle between two adjacent forks is 120°.

[0035] In order to improve the thermal conductivity and corrosion resistance of the heat pipe 2, the heat pipe 2 is made of copper material.

[0036] The cold side medium inlet 7 is parallel to the hot side medium inlet 8, which is convenient for practical application and installation.

[0037] The outer wall of the heat-conducting pipe 2 is provided with heat-conducting fins (the heat-conducting fins are not shown), which can further improve the cooling efficiency of the heat-conducting pipe 2.

[0038] The above are only preferred implementations of the utility model. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A three-pass heat exchanger structure, comprising a housing (1), characterized in that: The shell (1) is provided with a plurality of heat-conducting pipes (2) for cold-side medium to flow through, and the gap between the shell (1) and the heat-conducting pipes (2) is a hot-side medium flow zone. The two ends of the shell (1) are respectively provided with flow dividing ribs (6) for dividing the plurality of heat-conducting pipes (2) into a first heat exchange zone (3), a second heat exchange zone (4), and a third heat exchange zone (5). One end of the shell (1) is provided with a cold-side medium inlet (7) connected to the first heat exchange zone (3), and a hot-side medium inlet (8) connected to the hot-side medium flow zone. The second heat exchange zone (4) at this end is connected to the third heat exchange zone (5). The other end of the shell (1) is provided with a first cold-side medium outlet (9) connected to the first heat exchange zone (3), a cold-side medium return port (10) connected to the second heat exchange zone (4), a second cold-side medium outlet (11) connected to the third heat exchange zone (5), and a hot-side medium outlet (12) connected to the hot-side medium flow zone.

2. A three-pass heat exchanger structure according to claim 1, characterized in that: End covers (13) are respectively provided at both ends of the shell (1); the cold side medium inlet (7) is provided at the end cover (13) at one end, and the first cold side medium outlet (9) and the cold side medium return port (10) are both provided at the end cover (13) at the other end.

3. A three-pass heat exchanger structure according to claim 1, characterized in that: A plurality of hot side medium flow diversion baffles (14) arranged at intervals are provided in the shell (1), the hot side medium flow diversion baffles (14) are provided with flow diversion holes (15), and the flow diversion holes (15) of the hot side medium flow diversion baffles (14) are not on the same straight line.

4. A three-pass heat exchanger structure according to claim 3, characterized in that: The flow splitting holes (15) of each of the hot side medium flow splitting baffles (14) are arranged in a spiral pattern along the axial direction of the housing (1).

5. A three-pass heat exchanger structure according to claim 4, characterized in that: The cross-sectional areas of the first heat exchange zone (3), the second heat exchange zone (4), and the third heat exchange zone (5) are equal, and the numbers of the heat conduction pipes (2) in the first heat exchange zone (3), the second heat exchange zone (4), and the third heat exchange zone (5) are equal.

6. A three-pass heat exchanger structure according to claim 5, characterized in that: The cross-sectional area of ​​the diversion hole (15) is equal to the cross-sectional area of ​​the first heat exchange area (3).

7. A three-pass heat exchanger structure according to claim 1, characterized in that: The diverter rib (6) is a three-pronged structure, and the angle between two adjacent prongs is 120°.

8. A three-pass heat exchanger structure according to claim 1, characterized in that: The heat conducting pipe (2) is made of copper material.

9. A three-pass heat exchanger structure according to claim 1, characterized in that: The cold side medium inlet (7) is parallel to the hot side medium inlet (8).

10. A three-pass heat exchanger structure according to claim 1, characterized in that: The outer wall of the heat conducting pipe (2) is provided with heat conducting fins.

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