JPH0551421U - Boiling cooler - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the system by separating the coolant from the liquid without requiring an extra space. [Structure] A fin 24 is spirally provided on the inner circumference of a communication pipe 21 for sending the coolant to a radiator, and a wick 25 is provided on the outer circumference of the fin 24 to make the coolant from the water jacket a swirl flow, and the centrifugal force causes a liquid-phase coolant. Are collected in the wick and only the gas-phase coolant is sent to the radiator, the gas-liquid separator is omitted, and the coolant is separated into gas and liquid without the need for an extra space, and the device is simplified.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to 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.

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. The vapor-phase coolant is introduced into the radiator 8 and condensed and liquefied while flowing through the core tube 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.

[0007]

[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. For this reason, the device configuration is complicated and the cost is high.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a boiling cooling device that does not require a gas-liquid separator, and to simplify the device.

[0009]

[Means for Solving the Problems]

 To achieve the above object, the structure of the present invention is a boiling cooling device that cools an engine by boiling the coolant in the water jacket of the engine and utilizing boiling heat transfer. It is characterized in that fins are provided spirally on the inner circumference of a communication pipe for sending coolant to the radiator, and a liquid recovery member is provided on the outer circumference of the fins.

[0010]

[Action]

 The spiral fins cause the gas-liquid mixing coolant from the water jacket to turn into a swirling flow, and the liquid-phase coolant is recovered by the liquid recovery member by centrifugal force, and only the gas-phase coolant flows into the radiator.

[0011]

[Embodiment] FIG. 1 shows an overall configuration of a boiling cooling apparatus according to an embodiment of the present invention, FIG. 2 shows a cross section of a rear end portion of a communicating pipe, and FIG. 3 shows a partially broken perspective view of FIG. There is. The same members as those shown in FIG. 4 are designated by the same reference numerals, and duplicate explanations are omitted.

As shown in FIG. 1, the water jacket 5 and the radiator 8 of the engine 1 are connected by a communication pipe 21, and the radiator 8 and the water jacket 3 are connected by a return passage 22 via a circulation pump 9.

As shown in FIGS. 2 and 3, fins 24 are spirally provided on the inner peripheral surface of the rear end portion 21 a of the communication pipe 21 connected to the inflow pipe 23 of the radiator 8. A wick 25 as a liquid recovery member is provided on the outer periphery of the fin 24, and a drain port 26 connected to the return passage 22 is formed in the lower portion of the rear end portion 21a.

The gas-liquid mixed coolant that has boiled into steam in the water jacket 5 flows into the radiator 8 through the communication pipe 21. The coolant becomes a swirling flow by the fins 24 at the rear end portion 21a of the communication pipe 21, and the liquid-phase coolant is collected in the wick 25 by centrifugal force. The liquid-phase coolant collected in the wick 25 is returned from the drain port 26 to the water jacket 3 through the return passage 22. On the other hand, the vapor-phase coolant flows into the radiator 8 through the inflow pipe 23, is condensed and liquefied by the radiator 8, and is returned to the water jacket 3 through the return passage 22.

Therefore, the coolant can be separated into gas and liquid by the communication pipe 21 without providing a gas-liquid separator, and only the gas-phase coolant can flow into the radiator, and the condensation heat transfer can be effectively utilized.

[0016]

[Effect of the device]

 In the boiling cooling device of the present invention, the coolant can be separated into gas and liquid by the communication pipe that sends the coolant from the water jacket to the radiator, so that the gas-liquid separator can be omitted. As a result, gas-liquid separation can be performed without requiring an extra space, and the device can be simplified.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a boiling cooling device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a rear end portion of a communication pipe.

FIG. 3 is a partially cutaway perspective view of FIG.

FIG. 4 is an overall configuration diagram of a boiling cooling device including a gas-liquid separator.

[Explanation of symbols]

 3,5 Water jacket 8 Radiator 21 Communication pipe 21a Rear end part 23 Inflow pipe 24 Fin 25 Wick 26 Drain port

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Hisashi Doi 5-3-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation

Claims (1)

[Scope of utility model registration request] 1. A boiling cooling device for cooling an engine by boiling the coolant in a water jacket of an engine to utilize the boiling heat transfer, the inner circumference of a communicating pipe for sending the coolant from the water jacket to a radiator. A boil cooling apparatus, characterized in that a fin is provided in a spiral shape on the inner surface of the fin, and a liquid recovery member is provided on the outer periphery of the fin.