JPS59213917A - Boiling-cooling device of automobile engine - Google Patents

Abstract

PURPOSE:To return a liquid state coolant at cold time of an engine so as to prevent air from mixing, by providing a capped opening part in the upper part of a coolant circulative cooling system using boiling evaporation latent heat and communicating a storage tank to the coolant circulative system. CONSTITUTION:A filler cap 10 is provided in the highest position of a coolant circulative cooling system J using boiling evaporation latent heat, and an external storage tank 12 is communicated to said system J via a shut off valve 11 and cock 17 so that a liquid state coolant may be allowed to flow in and out by a pipe 21 of small diameter from the bottom end as low as possible of a water jacket 18. When an engine is stopped, it begins to cool, causing a vaporized part in a space 19 and a condenser 8 to condense and generating a negative pressure. In this way, an engine key switch 20 being opened ceases electrification of the shut off valve 11 to open the pipe 21, thus sucking the coolant in the storage tank 12 to be returned to the water jacket 18 through the cock 17, shut off valve 11 and the pipe 21. Accordingly, the circulative system J is filled all with the liquid coolant.

Description

[Detailed description of the invention] This invention (y+: High performance <r using latent heat of fat vaporization
This invention relates to improvements in soil cooling systems, and in particular to techniques for preventing air from entering the cooling system.

An example of a conventional boiling/cooling system is shown in FIG. To explain this, 1 is the engine, 2 is the temperature (temperature) (1) or pressure (1).

3 is a liquid level sensor, 4 is a liquid level, and 5 is a modulator.

6 is an electric fan, 7 is a supply pump, 8 is a heat radiation part or a condenser, and 9 is a lower tank. Most of the walk jacks 1 to 18 of the engine 1 are filled with liquid refrigerant, and the boiling heat is used to cool the combustion engine and the cylinder wall 4j.
do. The liquid level sensor j outputs a signal to the dicolator 5 so that the liquid level 4 becomes constant, and the refrigerant supply pump 7 is operated in accordance with the command. On the other hand, above the liquid level 4 is a space 19,
Steam accumulates here, and the steam that comes out from here goes to condenser 8.
It liquefies into a liquid refrigerant and accumulates in the lower tank 9. The electric fan 6 that blows air to the condenser 8 has a modulator based on the temperature or the value detected by the pressure sensor 2, so that the set temperature is determined by the operating state of the engine, for example, high in urban areas and low at high loads. It rotates according to the command from 5. In this way, the A-lot 11, the space 19. Capacitor 8. The lower tank 9 constitutes one refrigerant circulation system J.

However, in such a conventional engine cold FDL system, the engine is cold. )for,
As the vapor condenses leaving only a small partial pressure of vapor pressure, the inside of the refrigerant circulation system J becomes n+-, which gradually sucks in air from the outside, which causes Together with the steam, it enters the tube 1, which is a component of the condenser 8, where only the steam condenses, and the air remains in this tube, blocking the inflow of hot air later. There was a problem in that it significantly worsened the temperature of 1 fathom. During assembly, it was necessary to bleed air from the refrigerant circulation system, which was troublesome.

To solve this problem, a 151 aqueous porous filter was installed in the condenser or radiator in order to allow air to freely flow in and out of the system. 57608), although this can solve the problem of negative pressure in the circulation system, it requires the introduction of air.
] The problem of steam obstruction due to residual air in Nden Ridge Cove could not be resolved.

By the way, when installing a radiator for a water-cooled cooling IA system, a sub tank or a relief tank is connected to the A-half flow tube, and the temperature is n, lli A-bar flow L/, :1f2 (anti-freezing). When the temperature drops and the radiator's upper tank becomes negative pressure,
The stored liquid is returned to the upper tank from the lysotank and cooled again.Systems are known in the art.

(Refer to page 10 of ``Automotive Gasoline'' published by the Japan Automobile Maintenance Promotion Federation on August 20, 2017).

However, this is only a water-cooled cooling system.
This is to keep the water level of the radiator constant in the EL, and is not related to the boiling cooling system.

This invention has been made by paying attention to the above-mentioned conventional problems and focusing on the function of the sub-tank of a water-cooled N1 device. At the same time, a storage tank is installed that communicates with the refrigerant circulation system, and during engine operation, the refrigerant is stored in the storage tank, and during cold periods, the system is not vacuumed. J, the natural flow of the liquid refrigerant The refrigerant is returned to the system using
This is aimed at solving the above-mentioned problems.

Below, this invention will be explained based on the drawings. FIGS. 2 and 3 show an embodiment of the present invention, the former being during cold operation and the latter being during operation.

First, when explaining the 14 components, components 1 to 9 explained in Fig. 1 (well, they are the same, so the explanation will be omitted, and next to that, tj/, ni. In other words, 10 is the filler: l : t-tubu.

11 is a shutoff valve, 12 is an external storage tank, 13 is a liquid level, 14 is an external communication part, and 15 is a liquid level pin 1 of the lower tank 9.
], 16 is the liquid level, and 17 is the cock.

The storage tank 12 is installed outside the refrigerant circulation system J, and preferably,
J: l,, < L, L A- From the lower end of 18 to pipe 21 r' with a small diameter? A shutoff valve 11. allows refrigerant to enter and exit. ” is communicated via Tsuk 17. The capacity of this 117-storage tank 12 is the same as that of the upper space (see Figure 3), and the external communication part 1/I allows air to enter the outside air. The external communication part 14 uses a normal breather-type key or knob equipped with a filter or lather rinse hole.

The shutoff valve 11 closes the passage, that is, the pipe 21, when the excitation valve is energized.
Receives the output of J15 () and sends J to the command from modulator 5.
, the operation is on. Obedient(,''-Resin: 1-Suitsuji 2
When listening to the circuit with 0 turned off, the current is not energized, so listen to 9IJ theory and pipe 21C.

The filler refill 10 is a replenishment refill for liquid refrigerant, and is a lid that tightly seals an opening, that is, a refrigerant replenishment port 23, which is preferably disposed at the lowest position of the refrigerant circulation system. Is this lid pressure car L? , A safety valve (=J type) is suitable to prevent the risk of damage to the cooling system.

The liquid level sensor 15 is installed in the tank 9 of the capacitor 8 and detects the position of the liquid level 16 and transmits it to the output signal modulator 5. It is used to detect

Next, the effect will be explained.

First, we will explain and explain the assembly process (see Figure 2). After mounting the engine and cooling system on the vehicle and performing IC, close the cock 17 and close the filler cap 10. Pour g (preferably water or antifreeze) into the refrigerant circulation system J so that it is completely filled, and completely expel the air in the system. Add a small amount of refrigerant. And -117 Tubu 10
When closed, the circulation system is completely filled with liquid refrigerant. Next, listen to cock 17, which was closed earlier.

Next, the operation will be explained. (Refer to Figure 3) When the engine starts and enters the operating state, the refrigerant circulation system is filled with liquid refrigerant, so the refrigerant begins to expand and the storage tank 12 is filled with liquid refrigerant.
leaks to. At this time, the engine key switch 20 is closed, but since the liquid level sensor 4 and 15 in the tank 9 are not working, the shutoff valve 11 is not energized and the pipe 21 is open. Finally, the refrigerant in the A-Kuji 11 bucket 18 boils and steam accumulates in one space, and thermal pressure acts on the liquid level 4 as shown by the arrow.
The liquid refrigerant is smoothly introduced into the storage tank 12, and the refrigerant is stored therein. In this way, when the water level of the condenser + J8 falls and reaches the position of the liquid level sensor 15 installed in the lower tank 9, [the Schroeter 5 receives the output No. n of the liquid level sensor 15], and energizes the shutoff valve 11. I'll close this. Accordingly, liquid refrigerant equivalent to the volume of the -C vapor space 19 is stored in the storage tank 12 and exhibits a liquid level 13.

After that, the refrigerant circulation system J constitutes a circulation system separate from the storage tank 12, and when the liquid level 4 in the A-tajitokutsu 18 dries up, the output of the liquid level sensor 3 (Fi 'I) is adjusted to the modulator 5. commands the supply pump 7 to operate it, so that the liquid refrigerant is supplied to the engine 1 side A.
-The liquid level of the liquid sent to the tank 1-18 reaches -1.In this way, during engine operation, the refrigerant circulation system is independent of the storage tank, and as a separate circulation system, the cooling u1 by boiling and evaporation is carried out.
Consists of Sith51\.

1 After stopping the engine, there is a space for the engine to cool down 19
．． The vapor portion of the condenser 8 condenses and becomes negative pressure. The conventional device had the disadvantage that air was sucked in from the connection part, etc., but in the present invention, since the -resin key switch 2 is listening, the electricity to the shutoff valve 11 is cut off, and the pipe 2 is turned off.
17. Listen to 1 and check the refrigerant in the storage tank 12. The liquid refrigerant is sucked back into the pipe 18 through the shut-off valve 11 and the pipe 21, and the inside of the circulation system J is filled with liquid refrigerant.As a result, the refrigerant circulation system is filled with air. The liquid is prepared for the next operation without being sucked in.Thus, the storage tank 12 has a liquid level 13 as shown in Figure 2.
is lowered, returning to the initial state, that is, the engine cold state.

Naa3, this fruit is 711! Example i uses heat generated from the cylinder head to help warm up the cylinder.
Passes through the piston ring when cold (use J to prevent the lubricated surface from rising).

In other words, heat is generated fastest in the area around the combustion chamber wall and exhaust boat. Therefore, as shown in Figure 2 of C1,
The temperature inside the cylinder head, which is filled with particles, is 1.
As heat is transferred to Th in the cylinder,
It promotes warming up of the entire cone gin, quickly reduces the gap between the cylinder and piston, and prevents A-il rise.

As explained above, according to this invention, the ml
The vapor space of the cooling II system, such as the engine parts and condensers, is filled with liquid refrigerant for 1 hour, and the cooling system is constantly boiling during engine operation.
In order to function properly as the f1 evaporation 8 cooling JJI system, the refrigerant on the skewer corresponding to the volume of the space was discharged to the external storage tank! Therefore, the inside of the circulation system does not become a vacuum, so the air is cool), [Nli l1 mixed into the 1 system
There is no need to worry about deteriorating the performance of the ffi cooling system, and furthermore, there is no need for air purging in assembly 11).

Furthermore, the engine warm-up time is significantly reduced by λ0, and the efficiency of the heater is improved.

Embodiments of the present invention are listed below.

(1) Most of the water jacket is filled with liquid refrigerant and the engine is powered using the latent heat of vaporization. An external storage tank with a capacity corresponding to the gas space 1 must be installed.

(2) When the liquid level in the cooling system has reached a predetermined position, close the ml 117+ valve between A-Tajirekku 1~ and the external storage tank.

(3) Detect the liquid level with a liquid level sensor installed in the cylinder head and tank.

(4) A safety valve is installed on the refrigerant replenishment row 1-yap.

(5) Provide a vent hole for outside air in the external storage tank (
) and place a filter here.

[Brief explanation of drawings]

Figure 1 shows a typical example of a conventional boiling cooling system! 2 is a cross-sectional view showing the cold state of the system of the present invention before operation, and FIG.
This is a cross-sectional view showing a state in which the cooling JJI system is in constant operation. Explanation of the symbols shown in the drawing 1...Engine 2...Humidity or pressure level 3.5...Liquid level level 4.13 and 1G...Liquid level 5...Modulator 6...・Electric fan 7...
・Supply pump 8...Heat radiation part (lower 1 part) 9...Lower tank 10...Fish 4' P-tub (container) 11...Shutoff valve 12...External storage tank 14...Outside air communication Part 17...2 Jtsuk 18.
...Tsu A-Taji V cut 19... Space 23... Opening (refrigerant replenishment port) J... Refrigerant circulation system "J!j Fl' if applicant 1-1 San Jidochu Co., Ltd. +! Agent Patent Attorney Tamotsu Miyoshi !73 , +(,1
・. 1 Agent: Patent attorney Hidekazu Miyoshi, 'j. Fig. 1 0 7121 concave Fig. 3

Claims (1)

[Claims] In a system for cooling an engine by filling most of the 11-piece with liquid refrigerant and using the latent heat of boiling and vaporization of the liquid refrigerant, a door is provided at the top of the refrigerant circulation system with a lid on the right side, and the refrigerant circulation system is A boiling cooling device for an automobile engine, characterized in that it is provided with a storage tank communicating with the system.