JPH0547346U - 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 gas-liquid separation chamber 32 is formed, and the coolant inlet 33 is formed in the lower portion of the gas-liquid separation chamber 32.
And the gas-liquid separated gas-phase coolant and the liquid-phase coolant are respectively separated into core tubes 16a, 16
A bell mouth 35 as a partition wall for flowing from b to the lower tank 15 is provided in the upper tank 14, and gas-liquid mixing coolant is swirled in the gas-liquid separation chamber 32 to perform gas-liquid separation by its centrifugal force.

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. 4 shows the entire structure of the boiling cooling device.

As shown in FIG. 4, a water jacket 3 on the cylinder block 2 side of the engine 1 is provided with a coolant inlet 6, and a water jacket 5 on the cylinder head 4 side is provided with a coolant outlet. 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. 5 shows a conventional downflow type radiator used in a boiling cooling apparatus.

As shown in FIG. 5, 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 with a core tube arranged vertically, a gas-liquid separation chamber is formed in the upper tank and a coolant inlet is formed in the lower part of the gas-liquid separation chamber, while a coolant outlet is formed in the lower tank. In addition, a partition wall is provided in the upper tank to allow the vapor-phase separated coolant and the liquid-phase separated coolant to flow from the separate core tubes to the lower tank.

[0012]

[Action]

 When a gas-liquid separation chamber with a coolant inlet at the bottom is formed in the upper tank, and a partition wall was installed inside the upper tank, the gas-liquid mixed coolant that entered from the inlet of the upper tank became a swirl flow and was centrifuged. The force causes the liquid-phase coolant to flow along the inner surface of the gas-liquid separation chamber, while the gas-phase coolant is separated by flowing in the central part of the gas-liquid separation chamber. The liquid-phase separated liquid-phase coolant flows down into the lower tank through some of the core tubes, while the gas-phase coolant crosses the partition wall and enters another core tube where it is condensed and liquid-phase. And outflow from the outlet.

[0013]

【Example】

 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 cross section of a radiator for a boiling cooling device, and FIG. 3 is a cross section taken along the line AA of FIG. The members having the same functions as those in the related art are designated by the same reference numerals, and the duplicate description will be omitted.

In the radiator for a boiling cooling apparatus of this embodiment, a gas-liquid separation chamber is formed in the upper tank, a coolant inlet is formed in the lower part of the gas-liquid separation chamber, and the gas-liquid separated gas phase is formed. There is a partition wall inside the upper tank that allows coolant and liquid coolant to flow from separate core tubes to the lower tank.

As shown in FIG. 1, in a radiator 31 for a boiling cooling device, a large number of core tubes 16a, 16b are provided between the upper tank 14 and the lower tank 15 in the vertical direction, and the core tubes 16a, 16b are provided. A corrugated fin 17 for heat dissipation is provided between them. A gas-liquid separation chamber 32 is integrally formed on a side portion of the upper tank 14, and a coolant inlet 33 is provided in a lower portion of the gas-liquid separation chamber 32. A communication hole 34 is formed between the upper tank 14 and the gas-liquid separation chamber 32, and a tip end of the communication hole 34 extends outwardly and a partition wall protruding toward the gas-liquid separation chamber 32. The base end of the bell mouth 35 is fixed. On the other hand, the lower tank 15 is provided with an outlet 36 for the condensed water of the condensed and liquefied coolant.

Thus, the gas-liquid mixed coolant that has flowed in from the inflow port 33 of the gas-liquid separation chamber 32 becomes a swirling flow in the gas-liquid separation chamber 32, and the liquid-phase coolant is centrifugally applied to the inner surface of the gas-liquid separation chamber 32. On the other hand, since the vapor phase coolant has a low specific gravity, it is separated by flowing through the central part of the gas-liquid separation chamber 32. Then, the liquid-phase coolant (condensed water) separated from the gas-liquid flows down into the lower tank 15 through the inside of the core tube 16a by the bell mouth 35, while the gas-phase coolant (vapor) passes from the bell mouth 35 through the communication hole 34. Flow into the upper tank 14 and enter into another core tube 16b to condense there into a liquid phase, which then flows into the lower tank 15. After that, it flows out from the outflow port 36 together with the cooled liquid phase coolant in the lower tank 15.

In this way, the gas-liquid separation chamber 32 is formed in the upper tank 14, the coolant inlet 33 is formed in the lower part of the gas-liquid separation chamber 32, and the gas-liquid separated liquid-phase coolant and the gas-liquid separated liquid are separated. A bell mouth 35 is provided in the upper tank 14 to flow from the separate core tubes 16a and 16b to the lower tank 15 so that the liquid phase coolant flows down from the core tube 16a into the lower tank 15 and the vapor phase coolant passes through the communication hole 34. Since it is designed to flow into the lower tank 15 from another core tube 16b, 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 the gas-liquid separator can be omitted.

In the above-described embodiment, the bell mouth 35 is provided in the communication hole 34 between the upper tank 14 and the gas-liquid separation chamber 32 to reduce the inflow pressure loss of the vapor phase coolant (steam). Even if 35 is omitted and only the partition wall is mounted, the same operational effect can be obtained.

[0019]

[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 gas-liquid separation chamber is formed in the upper tank, and the lower part of the gas-liquid separation chamber is formed. A coolant outlet is formed on the lower tank while a coolant outlet is formed on the lower tank, and a partition wall for flowing the gas-liquid separated gas-phase coolant and liquid-phase coolant from separate core tubes to the lower tank is placed inside the upper tank. Since it is provided, the gas-liquid mixed coolant that has flowed in from the inlet can be made into a swirling flow in the gas-liquid separation chamber, and can be separated into liquid-phase coolant and gas-phase coolant by centrifugal force. It can be omitted to simplify the boiling cooling system.

[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 cross-sectional view of a radiator.

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

FIG. 4 is an overall configuration diagram of a general boiling cooling device.

FIG. 5 is a perspective view of a conventional downflow type radiator.

[Explanation of symbols]

 14 Upper Tank 15 Lower Tank 16a, 16b Core Tube 17 Corrugated Fin 31 Radiator 32 Gas-Liquid Separation Chamber 33 Coolant Inlet 34 Communication Port 35 Bellmouth (Partition Wall) 36 Coolant Outlet

 ─────────────────────────────────────────────────── ─── 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 gas-liquid separation chamber is formed in the upper tank and the coolant inlet is formed in the lower part of the gas-liquid separation chamber, while the coolant outlet is formed in the lower tank, and the gas-phase separated coolant and liquid are separated. A radiator for a boiling cooling device, characterized in that a partition wall is provided in the upper tank to allow the phase coolants to flow from different core tubes to the lower tank.