JPH0547347U - Radiator for boiling cooling system - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the boiling cooling system. A downflow radiator 31 having a core tube arranged vertically is used in a boiling cooling device for cooling an engine by boiling the coolant in a water jacket of the engine and utilizing boiling heat transfer.
In the upper tank 14, the coolant inlet 32 is formed, while in the lower tank 15, the coolant outlet 33 is formed.
And a swirl vane 37 as a swirl flow forming member is provided on a connecting pipe 34 as a communication pipe connected to the coolant inflow port 32, and a gas-liquid coolant and a liquid-phase coolant separated in the upper tank 14 are separated from each other. A partition wall 43 and a vent pipe 44 are provided as introduction passages leading to the separate core tubes 16a and 16b, and the gas-liquid mixed coolant flowing from the inlet is swirled by the swirl vanes 34. Separate into phase coolant.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radiator for a boiling cooling device used for cooling an automobile engine, for example.

[0002]

[Prior Art]

 In recent years, in engines for automobiles and the like, higher output has been promoted by using a supercharger or using a multi-valve intake / exhaust system. As a result, the amount of heat generated during operation is significantly higher than that of the conventional one, and a high-performance cooling device is also required.

The boiling cooling device was developed in response to such a demand, and FIG. 7 shows the entire structure of the boiling cooling device.

As shown in FIG. 7, a coolant jacket (coolant) inlet 6 is formed in the water jacket 3 on the cylinder block 2 side of the engine 1, and a coolant outlet is formed in the water jacket 5 on the cylinder head 4 side. 7 are formed. The inflow port 6 is connected to the radiator 8 by a circulation path 10 via a circulation pump 9, and the outflow port 7 is connected to the radiator 8 by a circulation path 10 via a gas-liquid separator 11. The gas-liquid separator 11 separates the liquid-phase coolant and the gas-phase coolant and guides only the gas-phase coolant to the radiator 8. The liquid-phase coolant is sent to the water jacket 3 without passing through the radiator 8. In the figure, 12 is a reserve tank that stores the coolant that overflows from the circulation path 10 during warm-up, and 13 is an electric fan that forcibly sends cooling air to the radiator 8 according to the temperature of the coolant and the like.

FIG. 8 shows a conventional down-flow type radiator used in a boiling cooling apparatus.

As shown in FIG. 8, a large number of core tubes 16 are provided vertically between a pair of upper and lower tanks 14 and 15 and a corrugated fin for heat radiation is provided between the core tubes 16. 17 are provided. An inflow pipe 18 having a coolant inflow port is connected to one of the upper tanks 14, and an outflow pipe 19 having an outflow port of the condensed and liquefied coolant is connected to the other of the other lower tanks 15. Radiator hoses 20 and 21 are mounted on the outflow pipe 18 and the outflow pipe 19, respectively.

In the boiling cooling device described above, the heat of the cylinder head 4 is absorbed by utilizing the boiling heat transfer of the coolant that has boiled in the water jacket 5, and the coolant that has boiled to become vapor is separated into the gas-liquid separator 11 Separate into liquid-phase coolant and gas-phase coolant. Then, the gas-phase coolant is introduced into the radiator 8 and condensed and liquefied while flowing through the core tube 16 of the radiator 8. The liquefied coolant is further cooled and sent to the water jacket 3 by the circulation pump 9.

The boiling cooling device has a higher cooling efficiency than a cooling device that circulates cooling water at a temperature below the boiling point, and a small amount of coolant may be circulated.

[0009]

[Problems to be solved by the device]

 In the above-mentioned boiling cooling device, in order to efficiently perform the condensation cooling, the gas-liquid separator 11 is arranged on the upstream side of the radiator 8 and the coolant is separated into the gas-phase coolant and the liquid-phase coolant, and only the gas-phase coolant is provided. It is flowing into the radiator 8. Therefore, there is a problem that the device configuration becomes complicated and the cost becomes high.

The present invention solves such a problem, and an object of the present invention is to provide a radiator having a gas-liquid separation function, and to simplify a boiling cooling device.

[0011]

[Means for Solving the Problems]

 The radiator for a boil cooling device of the present invention for achieving the above object is used in a boil cooling device for cooling an engine by boiling the coolant in the water jacket of the engine and utilizing boiling heat transfer, In a down-flow type radiator in which a core tube is arranged vertically, a coolant inlet is formed in the upper tank, a coolant outlet is formed in the lower tank, and a communication pipe connected to the coolant inlet is formed. It is characterized in that a swirl flow forming member is provided and an introduction path for introducing the gas-phase separated liquid-phase coolant and the liquid-phase coolant to the separate core tubes is provided in the upper tank.

[0012]

[Action]

 The communication pipe connected to the coolant inlet of the upper tank is provided with a swirl flow forming member and an introduction path for guiding the gas-liquid separated gas phase coolant and liquid phase coolant to separate core tubes. The flowing gas-liquid mixed coolant becomes a swirl flow by the swirl flow forming member and flows from the inlet of the upper tank, and the liquid-phase coolant flows along the inner surface of the communication pipe by centrifugal force, while the gas-phase coolant flows in the central part of the communication pipe. Separated by flowing. Then, the liquid-phase separated liquid-phase coolant flows down into a lower tank through a part of the core tube, while the gas-phase coolant enters into another core tube through an inlet pipe where it is condensed into a liquid phase. , Out of the outlet.

[0013]

【Example】

 FIG. 1 is a perspective view of an essential part of a radiator for a boil cooling apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the radiator, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. The BB cross section is shown. The members having the same functions as those of the related art are designated by the same reference numerals, and the duplicated description will be omitted.

In the radiator for a boiling cooling apparatus of the present embodiment, a swirl flow forming member is provided in the communication pipe connected to the coolant inlet of the upper tank, and the separated vapor-liquid coolant and liquid-phase coolant are provided in the upper tank. Introductory paths are provided to lead to separate core tubes.

As shown in FIGS. 1 to 4, in a radiator 31 for a boiling cooling device, a large number of core tubes 16a and 16b are provided between the upper tank 14 and the lower tank 15 along the vertical direction. , 16b, a corrugated fin 17 for heat radiation is provided. A coolant inlet 32 is formed on one side of the upper tank 14, while a coolant outlet 33 is formed on the other side of the lower tank 15.

At the coolant inlet port 32 of the upper tank 14, a connection pipe 34 as a communication pipe for sending the coolant from the water jacket to the radiator is formed integrally with the upper tank 14, and a tube 35 is provided at the connection pipe 34. It is connected. The connecting tube 34 has a base end portion that expands outward to form an enlarged portion 36, and a swirl vane 37 as a swirl flow forming member is mounted inside the tip end portion. The swirl vane 37 has a plurality of twisted vanes 40 fixed between a central shaft 38 and an outer cylinder 39, and the outer cylinder 39 is fixed to the inner peripheral surface of the connecting pipe 34.

Further, the upper tank 14 is formed with a partition wall 43 that divides the inside into two to form the chambers 41 and 42. A vent pipe 44 serving as an introduction path is formed integrally with the partition wall 43, one of which opens to the enlarged portion of the connection pipe 34 and the other of which opens into the chamber 41 divided by the partition wall 43.

Thus, the gas-liquid coolant flows from the water jacket into the upper tank 14 of the radiator 31 via the tube 35 and the connecting pipe 34. At this time, the gas-liquid coolant that has flowed into the connecting pipe 34 becomes a swirling flow by the swirl vanes 37, and the liquid-phase coolant flows along the inner surface of the connecting pipe 34 due to centrifugal force. It is separated by flowing through the central portion of 34. Then, the liquid-phase coolant (condensed water) that has been separated into gas and liquid flows along the inner surface of the enlarged portion 36 of the connection pipe 34, flows into the room 42, and flows down into the lower tank 15 through the inside of the core tube 16a. On the other hand, the vapor-phase coolant (vapor) flows from the connecting pipe 34 through the vent pipe 44 into the chamber 41, enters into another core tube 16b, condenses there, becomes a liquid phase, and flows into the lower tank 15. .. After that, it flows out from the outlet 36 together with the cooled liquid phase coolant in the lower tank 15.

As described above, the connection pipe 34 connected to the coolant inlet port 32 of the upper tank 14 is provided with the swirl vanes 37 as a swirl flow forming member, and the upper tank 14 is provided with the gas-liquid separated liquid-phase coolant and the liquid-phase coolant separately. A partition wall 43 and a vent pipe 44 are provided as an introduction path leading to the core tubes 16a and 16b of the above, and liquid phase coolant is made to flow down from the core tube 16a into the lower tank 15, and the vapor phase coolant passes through the vent pipe 44. Since the core tube 16b is made to flow into the lower tank 15, gas and liquid are dispersed and flow into the dedicated core tubes 16a and 16b respectively, and the water film on the inner surface of the core tube 16b is reduced. As a result, the heat radiation amount of the radiator increases. Further, the radiator 31 can perform the gas-liquid separation of the coolant without providing a special gas-liquid separation mechanism, and this gas-liquid separator can be omitted.

In the above-described embodiment, the swirl vanes 37 as the swirl flow forming member are attached to the connection pipe 34 as the communication pipe, but the installation location is not limited to this, and for example, the tube 35 may be installed. You may wear it.

The swirl flow forming member is not limited to the swirl vane 37. Another swirl flow forming member is shown in FIGS. The swirl vane 51 as the swirl flow forming member shown in FIG. 5 is formed by spirally winding a plate material. On the other hand, the swirl blade 52 as the swirl flow forming member shown in FIG. 6 is formed by twisting a plate material in the circumferential direction. As described above, the swirl flow forming member may be any member that causes a swirl flow in the coolant.

[0022]

[Effect of the device]

 As described above in detail with reference to the embodiments, according to the radiator for a boiling cooling device of the present invention, in the downflow type radiator, the coolant inlet is formed in the upper tank while the coolant outlet is formed in the lower tank. In addition, since the swirl flow forming member is provided in the communication pipe connected to the coolant inlet, and the upper tank is provided with the introduction passages for introducing the gas-liquid separated gas-phase coolant and the liquid-phase coolant into separate core tubes. The gas-liquid mixed coolant flowing in from the inlet becomes a swirl flow by the swirl flow forming member, and the centrifugal force can separate it into liquid phase coolant and gas phase coolant, and the gas-liquid separator of the boiling cooling device is omitted. Therefore, the boiling cooling device can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a radiator for a boiling cooling device according to an embodiment of the present invention.

FIG. 2 is a side view of a radiator.

3 is a cross-sectional view taken along the line AA of FIG.

4 is a sectional view taken along line BB of FIG.

FIG. 5 is a perspective view of another swirl flow forming member.

FIG. 6 is a perspective view of another swirl flow forming member.

FIG. 7 is an overall configuration diagram of a general boiling cooling device.

FIG. 8 is a perspective view of a conventional downflow radiator.

[Explanation of symbols]

 14 Upper Tank 15 Lower Tank 16a, 16b Core Tube 17 Corrugated Fin 31 Radiator 32 Coolant Inlet 33 Coolant Outlet 34 Connection Pipe (Communication Pipe) 35 Tube (Communication Pipe) 37, 51, 52 Swirling Blade (Swirl Flow Forming Member) 43 Partition Wall (introduction path) 44 Vent pipe introduction path)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuji Ukita 5-3-8, Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation

Claims (1)

[Scope of utility model registration request] 1. A downflow type in which a core tube is arranged in a vertical direction, which is used in a boiling cooling device for cooling an engine by boiling the coolant in a water jacket of the engine and utilizing boiling heat transfer. In the radiator of 1, the coolant inlet is formed in the upper tank, the coolant outlet is formed in the lower tank, and the swirl flow forming member is provided in the communication pipe connected to the coolant inlet, and gas and liquid are separated in the upper tank. A radiator for a boiling cooling device, which is provided with an introduction path for guiding a gas-phase coolant and a liquid-phase coolant to separate core tubes.