JPH0547348U - Radiator for boiling cooling system - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the boiling cooling system. A down-flow type radiator in which a core tube is vertically arranged, which is used in a boiling cooling device that cools an engine by boiling the coolant in a water jacket of the engine to utilize boiling heat transfer. Three
1, the upper end of the inflow pipe 32 as a coolant supply passage having the coolant inlet 33 at the lower end is connected to one side of the upper tank 14 while the lower tank 15
A coolant outlet 34 is formed on the other side of the upper tank 14, and a partition plate 35 is provided in the upper tank 14 for flowing the vapor-phase separated liquid-phase coolant and the liquid-phase coolant from the separate core tubes 16a and 16b to the lower tank 15, respectively. Gas-liquid separation is performed by supplying the coolant that has flowed into the upper tank 14 through the inflow pipe 32.

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

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

As shown in FIG. 3, 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, the upper end of the coolant supply passage with the coolant inlet at the lower end is connected to one side of the upper tank while the coolant flow to the other side of the lower tank. The present invention is characterized in that a partition plate is provided in the upper tank, which forms an outlet, and through which gas-liquid separated gas-phase coolant and liquid-phase coolant flow from separate core tubes to the lower tank.

[0012]

[Action]

 By connecting the upper end of the coolant supply passage with the coolant inlet at the lower end to one side of the upper tank and providing a partition plate inside the upper tank, the coolant flowing from the inlet passes through the coolant supply passage. Then, it is separated into a gas-phase coolant and a liquid-phase coolant. Then, the liquid-phase coolant is cooled through some of the core tubes and flows to the lower tank, while the gas-phase coolant passes through the other core tube and is condensed there to become a liquid phase and flows to the lower tank. leak.

[0013]

【Example】

 FIG. 1 shows a cross section of a radiator for a boiling cooling device according to an embodiment of the present invention. The members having the same functions as those in 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, the upper end of the coolant supply passage having the coolant inlet at the lower end is connected to one side of the upper tank, and the vapor-phase coolant is separated from the liquid. A partition plate is provided to allow liquid coolant and liquid coolant to flow from different 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. An inflow pipe 32 as a coolant supply passage is attached to a side portion of the radiator 31, and a coolant inflow port 33 is provided in a lower portion of the inflow pipe 32, while an upper portion is provided on one side of the upper tank 14 (see FIG. 1 right side). On the other side of the lower tank 15 (on the left side in FIG. 1), an outlet 34 for the condensed water of the condensed and liquefied coolant is provided.

Further, a partition plate 35 is attached to the upper tank 14 to divide the inside into left and right in FIG. The partition plate 35 is for allowing the gas-phase coolant and the liquid-phase coolant that have flowed into the upper tank 14 from the inflow pipe 32 and separated into liquids to flow down into the lower tank 15 from separate core tubes. The separated liquid-phase coolant flows down from the core tube 16a into the lower tank 15 by the partition plate 35, while the gas-phase coolant flows over the partition plate 35 and flows down into the lower tank 15 from another core tube 16b. ing.

Thus, the coolant that has flowed in from the inflow port 33 of the inflow pipe 32 flows into the upper tank 14 through this inflow pipe 32, and at this time, it is separated into a gas-phase coolant and a liquid-phase coolant. Then, the liquid-phase coolant (condensed water) flows into the lower tank 15 through the inside of the core tube 16a by the partition plate 35, and flows to the outlet 33 side. On the other hand, the vapor-phase coolant (steam) passes through the partition plate 35 in the upper tank 15 in a saturated steam state, passes through another core tube 16b, is condensed there to become a liquid phase, and flows into the lower tank 15. Then, it flows out from the outflow port 34 together with the cooled liquid phase coolant in the lower tank 15.

The upper end of the coolant inflow pipe 32 having the inflow port 33 formed at the lower end is connected to one side of the upper tank 14, and a partition plate 35 for dividing the inside is provided in the upper tank 14 to provide a liquid phase. The coolant is allowed to flow into the lower tank 15 only from a part of the core tubes 16a, and the vapor phase coolant is allowed to flow over the partition plate 35 into the lower tank 15 from another core tube 16b. The radiator can perform gas-liquid separation of the coolant without providing a liquid separation mechanism, and this gas-liquid separator can be omitted.

In the above-described embodiment, the inflow pipe 32 as a coolant supply passage is mounted separately from the radiator 31 and is connected to the upper tank 14. This supply passage is used inside the radiator 31 by using a core tube. The radiator 31 may be provided integrally with the radiator 31 by the above-mentioned formation, and the sufficient effect can be obtained and the structure can be simplified.

[0020]

[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 upper end portion of the coolant supply passage having the coolant inlet port at the lower end portion is provided. While connecting to one side of the upper tank, a coolant outlet is formed on the other side of the lower tank, and the gas-liquid separated gas phase liquid and liquid phase coolant flow from separate core tubes to the lower tank. Since it is installed in the tank, the coolant flowing from the inlet is supplied to the upper tank through the coolant supply passage, and the gas-liquid separation of the coolant can be performed with a simple structure without installing a special gas-liquid separation mechanism. Therefore, it is possible to simplify the boiling cooling device by omitting the gas-liquid separator of the boiling cooling device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a radiator for a boiling cooling device according to an embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a general boiling cooling device.

FIG. 3 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 Inflow Pipe (Coolant Supply Passage) 33 Coolant Inlet 34 Coolant Outlet 35 Partition Plate

Continued Front Page (72) Creator Masatoshi Ninoyu Mitsubishi Motors Co., Ltd., 3-8-3-5, Shiba, Minato-ku, Tokyo

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 upper end of the coolant supply passage having the coolant inlet at the lower end is connected to one side of the upper tank, while the coolant outlet is formed on the other side of the lower tank, and the gas-liquid separated gas phase is formed. A radiator for a boiling cooling device, characterized in that a partition plate for flowing a coolant and a liquid-phase coolant from separate core tubes to the lower tank is provided in the upper tank.