JPH05928U - Radiator for boiling cooling system - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a radiator for a boiling cooling device that has the functions of both a gas-liquid separator and a condenser. [Structure] The radiator 10 in the figure is a cross-flow type in which a plurality of core tubes 18a and cores 18 including corrugated fins 18b are horizontally interposed between an upstream side tank 16 and a downstream side tank 17. is there. An inlet pipe 19 is formed in the lower part of the upstream side tank 16, and an outlet pipe 20 is formed in the lower part of the downstream side tank 17. Since the vapor-phase coolant (vapor) flowing into the radiator 10 has a small specific gravity, it separates from the liquid-phase coolant and rises in the side tank 16. After that, the steam flows into the core tube 18a formed in the upper layer of the upstream side tank 16 and is condensed and liquefied before reaching the downstream side tank 17.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radiator of a boiling cooling device used for cooling an automobile engine or the like.

[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 request, and as shown in FIG. 3, the coolant is applied to the water jacket 3 on the cylinder block 2 side and the water jacket 5 on the cylinder head 4 side of the engine 1. An inlet 6 and an outlet 7 for the (cooling liquid) are formed, respectively, and these are connected by a circulation path 11 in which a gas-liquid separator 8, a condenser 9, and a radiator 10 are arranged as condensing and cooling means. ing. In the figure, 12 is a circulation pump that pumps coolant under pressure, and 13 is a thermostat that bypasses the coolant during cooling. Further, 14 is a reserve tank that stores the coolant overflowing from the circulation path 11 during warm-up, and 15 is an electric fan that sends cooling air to the condenser 9 and the radiator 10 according to the temperature of the coolant and the like.

In the boiling cooling device, first, the coolant that has boiled in the water jacket 5 absorbs the heat of the cylinder head 4 by utilizing the action of depriving the heat of vaporization, and the coolant that has boiled to become vapor containing droplets is removed. The gas-liquid separator 8 separates into a gas phase and a liquid phase. Then, the steam is condensed and liquefied by the condenser 9, and the saturated liquid phase coolant is further cooled by the radiator 10, and is circulated to the engine 1 by the circulation pump 12. The reason why gas-liquid separation is performed in the boiling cooling device is that when the liquid droplets flow into the condenser 9, the liquid droplets adhere to the inner wall of the core tube (not shown) and the heat transfer efficiency between the steam and the core tube is significantly reduced. is there.

[0005]

[Problems to be solved by the device]

 The boiling cooling device has higher cooling efficiency than the conventional cooling device that circulates cooling water at a temperature below the boiling point, and also has features such as a small amount of coolant. However, as described above, as the condensation cooling means, the gas-liquid separator 8 and the condenser 9 are required in addition to the radiator 10, which complicates the apparatus configuration and increases the cost.

The present invention has been made in view of the above situation, and an object of the present invention is to provide a radiator for a boiling cooling device that has the functions of a gas-liquid separator and a condenser.

[0007]

[Means for Solving the Problems]

 Therefore, in order to solve this problem, the present invention is a radiator of a cross-flow type used in a boiling chiller that cools an engine by boiling the coolant in a water jacket of the engine and cooling the engine by the heat of vaporization. A radiator for a boiling cooling device is proposed, in which an inlet pipe to which a hose is connected is formed in the lower part of an upstream side tank.

[0008]

[Action]

 The coolant flowing from the engine into the lower part of the side tank flows through the upper layer of the radiator core after it has risen in the vapor phase, and is condensed and liquefied, while the steam still flows through the lower layer of the radiator core. To be cooled.

[0009]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a radiator for a boil cooling apparatus according to the present invention, and FIG. 2 is a vertical cross section thereof.

As shown in these drawings, the radiator 10 of the present embodiment has a radiator core 18 including a large number of core tubes 18a and corrugated fins 18b between an upstream side tank 16 and a downstream side tank 17. It is a cross-flow type in which is horizontally inserted. An inlet pipe 19 is formed in the lower portion of the upstream side tank 16, and an outlet pipe 20 is formed in the lower portion of the downstream side tank 17. A radiator hose 21 that feeds the coolant from the engine 1 is connected to the inlet pipe 19, and a radiator hose 22 that feeds the coolant to the circulation pump 12 is connected to the outlet pipe 20. In the figure, reference numeral 23 is an air bleeding valve attached to the upper surface of the downstream side side tank 17, which is opened when the coolant is changed and the like so that the inside of the radiator 10 and the atmosphere are communicated with each other.

The operation of this embodiment will be described below. When the engine 1 is started and enters the normal operation state, the coolant that has filled the circulation path 11 including the water jackets 3 and 5 thermally expands and flows into the reserve tank 14, and the boiling cooling is started. Then, in the water jacket 5 on the cylinder head 4 side, the coolant exposed to high temperature boils and evaporates, and in a state where the gas phase and the liquid phase are mixed, from the outlet 7 via the radiator hose 21 to the radiator 10. It flows into the side tank 16 on the upstream side.

At this time, in this embodiment, since the inlet pipe 19 is formed in the lower portion of the side tank 16 on the upstream side, the liquid phase of the inflowing coolant is directly transferred to the lower layer portion of the radiator core 18. It flows into the formed core tube 18a and is cooled until it reaches the side tank 17 on the downstream side. On the other hand, the vapor-phase coolant (steam) is separated from the liquid-phase coolant because of its small specific gravity, and rises in the side tank 16 as shown in FIG. After that, the steam flows into the core tube 18a formed in the upper layer portion of the radiator core 18 on the upstream side, and is condensed / liquefied by the time it reaches the side tank 17 on the downstream side. That is, in this embodiment, the side tank 16 on the upstream side functions as a steam separator, and the upper layer portion of the radiator 10 functions as a condenser.

[0013]

[Effect of the device]

 According to the radiator for a boil cooling apparatus according to the present invention, since the radiator is made to have the functions of the steam separator and the condenser, it is possible to reduce the number of parts and the number of assembly steps and the cost. Has the effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a radiator for a boil cooling apparatus according to the present invention.

FIG. 2 is a vertical sectional view showing an embodiment of a radiator for a boiling cooling device according to the present invention.

FIG. 3 is a conceptual diagram showing an overall layout of a conventional boiling cooling device.

[Explanation of symbols]

 1 Engine 3,5 Water Jacket 10 Radiator 16 Side Tank on Upstream Side 17 Side Tank on Downstream Side 18 Radiator Core 18a Core Tube 19 Inlet Pipe 20 Outlet Pipe 21,22 Radiator Hose

Claims (1)

[Claims for utility model registration] 1. A cross-flow type radiator used in a boiling cooling device for boiling a coolant in a water jacket of an engine and cooling the engine by the heat of vaporization of the coolant. A radiator for a boiling cooling device, characterized in that an inlet pipe to which a hose is connected is formed in a lower portion of an upstream side tank.