JPS6183440A - Evaporative cooling device for internal-combustion engine - Google Patents

Abstract

PURPOSE:To accelerate the warm-up of an engine, by delaying the operation of an air discharge device inside a cooling system to some extent at the time of engine starting at low temperature of the outside air. CONSTITUTION:A solenoid valve 36 is installed in an air discharge passage 35 connecting a topmost part in a refrigerant circulating system to a reservoir tank 31, while a temperature sensor 43 is installed in a water jacket 12. A control unit 41 inputs signals out of each sensor and delays the operation of the valve 36 of the air discharge passage as long as the specified time immediately after engine starting in the case where refrigerant temperature and outside temperature are low. With this constitution, only a relatively small quantity of the liquid phasic refrigerant so far stayed in the water jacket 12 receives combustion heat, thus a temperature rise takes place speedily.

Description

[Detailed Description of the Invention] Industrial Field of Application This invention involves sealing a refrigerant in a closed refrigerant circulation system consisting of a water jacket, a condenser, etc., and boiling and vaporizing the liquid phase refrigerant stored in the water jacket. The present invention relates to a boiling cooling device for an internal combustion engine that cools the engine.

Conventional technology In the well-known water-cooled cooling system used in automobile engines, a considerable temperature difference occurs between the water inlet and the water outlet of the walk jacket, achieving uniform cooling. It is difficult to do so, and there is a limit to the heat exchange efficiency of the radiator, so the two radiators and cooling fans have to be large.

From this point of view, cooling devices that utilize the latent heat of boiling and vaporization of cooling water have been attracting attention in recent years (for example, the
7608, JP-A-57-62912, etc.]. Basically, the liquid refrigerant (cooling water) is boiled and vaporized in the water jacket, and the generated vapor is led to an external condenser/f (radiator) to liquefy heat and then liquefy the heat.
A cooling system that uses the porous structure of the refrigerant, which is configured to circulate and supply the refrigerant into the water jacket, requires an extremely small amount of cooling water compared to a water-cooled system that uses simple temperature changes in the cooling water. It has been pointed out that the required heat dissipation amount can be satisfied through the circulation of radiators, the condenser can be made much smaller than the conventional radiator, and the temperature distribution in each part of the engine can be made even. Although boiling cooling type cooling devices are thought to have various advantages, they have not yet been put into practical use. That is, the refrigerant circulation systems described in Japanese Patent Publication No. 57-57608 and Japanese Patent Application Laid-Open No. 57-62912 have a non-sealed structure in which a portion of the refrigerant circulation system is open to the atmosphere.

The problem is that the loss of vaporized refrigerant is so large that it cannot be ignored in practice, and it is difficult to completely remove air, which is a non-condensable gas, from the system, resulting in a significant drop in cooling performance due to residual air. It had

In view of the above-mentioned circumstances, the present applicant has previously proposed a boiling cooling device in which a predetermined amount of refrigerant is sealed in a closed refrigerant circulation system to perform a boiling and condensing cycle (
Patent Application No. 58-145470 etc. This system forcibly introduces liquid refrigerant into the system from a reservoir tank outside the system when a burst starts, and also pushes out the air in the system by opening the air exhaust on-off valve installed at the top of the system. Alternatively, when the system is completely filled with liquid phase refrigerant, close the on-off valve at the top of the system, and then discharge excess refrigerant out of the system, for example by using the generated vapor pressure, to use the desired refrigerant. I'm trying to get the enclosed state. Furthermore, in the previous Japanese Patent Application No. 145470/1984, a liquid level sensor is provided at the top of the system to directly detect when the air discharge is completed and when the system is completely filled with liquid phase refrigerant. However, a patent application filed in 1983 that further improved this
In No. 228148, etc., the liquid phase refrigerant is forcibly introduced for one hour using a timer, and the overflowing liquid phase refrigerant is collected in the reservoir 7, thereby omitting the liquid level section. There is.

Problem to be Solved by the Invention Since the liquid level of the liquid refrigerant that exists in the system before the engine starts is not υ- due to the presence of invading air, the liquid refrigerant is forced as in the latter case. If you install it for one hour using a timer,
Naturally, it is necessary to set the driving time with sufficient allowance in mind. For this reason, 1. Normally, after the system is filled with water, liquid phase refrigerant circulates between the system and the reservoir tank.

Therefore, in cold regions where the temperature of the refrigerant in the reservoir tank is low, the temperature of the refrigerant in the system will rise slowly after startup, and the former will end immediately when the system is full of water due to detection by the 5VC liquid level sensor. The time required for warming up is longer than that in the case where the That's why.

In models equipped with a hot water system in which liquid phase refrigerant is guided from inside the water jacket and passed through the heater core in the vehicle interior, a large amount of low temperature refrigerant is sent from a reservoir tank outside the system, causing the heater to The rise of 9 is bad.

This invention promotes warming up in such cold regions by 9
9. The purpose is to increase the startup time of the heater.

Means for Solving the Problems FIG. 1 is a functional block diagram showing the structure of the present invention. In the refrigerant circulation system 1, the refrigerant undergoes a cycle of boiling and condensation.
It is mainly composed of a water jacket 2 in which a liquid phase refrigerant is stored and a condenser 3 that condenses the refrigerant vapor generated therein by exchanging heat with the outside air, and is kept in a sealed state from the outside air.

A reservoir tank 4 which is open to the atmosphere is provided outside the refrigerant circulation system 1, and a preliminary liquid phase refrigerant for air discharge is stored inside the reservoir tank 4. Also, between the reservoir tank 4 and the refrigerant circulation system 1.

A refrigerant supply pump 5 is used, and by driving the refrigerant supply pump 5, the preliminary liquid phase refrigerant can be introduced into the p system in a strong πI direction. Note that the refrigerant supply pump 5 can also be used as a bonder or the like for circulating and supplying refrigerant within the system.

The air discharge passage 6 has one end connected to the top of the refrigerant circulation system 1 and the other end connected to the reservoir tank 4, and an on-off valve 7 is provided in the passage.

The air discharge control means 8 performs a series of controls when the on-off valve 7 is fully opened for a period of time and the refrigerant supply bonder 5 is driven, and its operation is started based on a starting signal from the local authority. The delay means 9 then controls the temperature detection means 1.
Based on the detection of 0, at low temperature, the air discharge control means 8
This delays the start of operation. The temperature detection means [0 is provided for appropriate temperature conditions such as the refrigerant temperature within the system, the outside air temperature, and the vehicle interior temperature. Further, the start of operation may be delayed for a period of time, for example, until the temperature of the refrigerant in the system reaches a predetermined temperature, or for one hour, or until the engine reaches a predetermined operating state.

Effect In the above configuration, when the engine is started at a predetermined high temperature,
Air is evacuated immediately after startup. That is, liquid phase refrigerant is fed into the refrigerant circulation system 1 from the reservoir tank 4 by the refrigerant supply valve/pro, and the air in the h system is discharged from the top of the system through the air discharge passage 6t. This air discharge is continued for a preset period of time, and the liquid phase refrigerant that overflows after the system is once filled with water is collected into the reservoir tank 4.

In cases where the outside temperature is low, do not exhaust air immediately after starting. Therefore, only a relatively small amount of the liquid phase refrigerant present in the system, particularly in the water jacket 2, receives the combustion heat, and the temperature increases. Thereafter, when the delay is canceled under a predetermined condition, the air is discharged by introducing the liquid refrigerant, as in the case described above.

Embodiment FIG. 2 shows an embodiment of the boiling cooling device according to the present invention.
13 is a condenser for condensing a gas phase refrigerant, and 14 is an electric refrigerant supply bonder.

The water jacket 12 is used for internal combustion engine 11.
.

It is formed across both the cylinder block 15 and the cylinder head 16 so as to surround the outer periphery of the cylinder and combustion chamber, and the upper part, which is normally a gas phase space, communicates with each other, and the upper part A steam outlet 17 is provided at an appropriate position. The steam outlet 17 of C is
Condenser 13 via connecting pipe 18 and steam passage 19
The upper inlet 13 of the refrigerant circulation system is connected to the upper inlet 13 of
It is formed in the shape of an & rising upward, and
Camp 20 seals the upper opening.

The condenser 13 is composed of an amper tank 21 having the inlet 13 &, a core section 22 mainly composed of fine tubes for the upper and lower blades, and a lower tank 23 that temporarily stores the liquefied refrigerant condensed in the core section 22. 1 is installed in a position such as the front of the vehicle that receives the wind from the vehicle, and is further provided with an electric cooling fan 24 for forced cooling on the front or back side. Further, the lower tank n has one end of a refrigerant circulation passage 25 connected to a relatively lower portion thereof, and one end of a first auxiliary refrigerant passage 26 to an upper portion of the lower tank n. The other end of the refrigerant circulation passage 25 is connected to the refrigerant passage 12aK provided on the cylinder head 16 side of the water jacket 12, and the refrigerant circulation passage 25 is provided with a three-way type second solenoid valve 27 in the convex passage. The refrigerant supply bonder 14 is interposed between the second solenoid valve 27 and the rotor 7n.

31 is the water jacket 12 and the capacitor 13.
t- A servo pump is provided outside the closed refrigerant circulation system, which is open to the atmosphere through a camp 32 having a ventilation function, and is located at approximately the same height as the walk jacket 12. The first auxiliary refrigerant passage 26 and the second auxiliary refrigerant passage 26 are installed at the bottom thereof.
It is connected to an auxiliary refrigerant passage 33. The first auxiliary refrigerant passage 26 has a normally open type 311 magnetic valve 34 in the passage.
The second auxiliary refrigerant passage 33 has a second i!
It is connected to the refrigerant circulation passage 25 via a magnetic valve 27 .

The second solenoid valve 27 is in the refrigerant circulation passage 25 in the excited state.
In the non-excited state, the second auxiliary refrigerant passage 33 is closed and the refrigerant circulation passage 25 is in communication (flow path B). That is. As the refrigerant supply pump 14, a pump capable of pumping liquid phase refrigerant in both forward and reverse directions is used.If the refrigerant supply bonder 14 is driven in the forward direction in the state of the flow path A, the lower tank n The liquid phase refrigerant can be forcibly discharged from the reservoir tank 31 to the reservoir tank 31, and by driving in the opposite direction, the liquid phase refrigerant can be forcibly introduced from the reservoir tank 31 to the lower tank 23.
4 in the forward direction, the liquid phase refrigerant can be circulated and supplied from the rotor 23 to the walk jacket 12.

On the other hand, the discharge pipe attachment part 18 which is the top of the above-mentioned closed system
m has an air discharge passage 35 for discharging air within the system.
The distal end of the air discharge passage 35 opens into the reservoir tank 31 in order to recover the liquid refrigerant that overflows at the same time as the air is discharged. A normally closed first solenoid valve 36 is interposed in the air exhaust passage 35.

The electromagnetic valves 3G, 27, 34, the refrigerant supply bonder 14, and the cooling fan 24 are driven and controlled by a control device 41 using a so-called microcomputer system. 1 liquid level 42. Temperature sensor 43. Roak/ri2
The control described later is performed based on detection signals from a second liquid level switch 44 provided at the top of the circulation system and a negative pressure switch 45 provided at the top of the circulation system.

Here, the above 1. The second liquid level sensors 42 and 44 are, for example, 70 type sensors using reed switches, and turn on and off to determine whether the refrigerant liquid level has reached a set level.
The first liquid level sensor 42 is set at a height approximately in the middle of the cylinder head 16, and the second liquid level sensor 44 is set at a height approximately at the middle of the cylinder head 16. The opening of the auxiliary refrigerant passage 26 is also set at a slightly upward height. In addition, the temperature sensor 43 is, for example, a thermal sensor, etc., and the WJ1 liquid level cm 42 mentioned above is
The refrigerant temperature within the water jacket 12 is detected by the refrigerant at a position slightly below the refrigerant. In addition, the negative pressure switch 45 uses a diaphragm that responds to the differential pressure between atmospheric pressure and system internal pressure, and the system internal pressure is negative with respect to the atmospheric pressure in the operating environment, regardless of whether it is at high altitude or low altitude. Specifically, the operating pressure is set to about 130 to -5 (lnHg).

Note that various sensors for detecting other engine operating conditions are not shown.

Reference numeral 51 denotes a heating heater core provided in the vehicle compartment 52, whose upper inlet is connected to the vicinity of the upper end of the cylinder block 15 of the water jacket 12 via the heater artificial passage 53, and whose lower outlet is connected to the heater outlet passage 54. It is connected to a portion of the cylinder head 16 side which is a normal liquid phase refrigerant region via. , and 55 is liquid phase? 9r IjJ k
A heat bong 56 for circulating air between the walk jacket 12 and the heater core 51 is a blower for blowing air, and these are configured to be driven in conjunction with a heater switch (not shown).

Next, A3 to Figure 12 are flowcharts showing the contents of the control executed in the control device.
+! This will be explained along the flow from the start to the stop of the i valve.
, 34 respectively rt@ben■J, rla@ben■''...
The liquid level inside the water jacket 12 is abbreviated as "CZH internal liquid level."

Figure 3 is a flowchart showing the outline of the control. When the engine starts (ignition key 0N) and the engine control starts, the initialization process in step l (see Figure 5) is performed, and then the air exhaust is started. Determine whether it is a low temperature condition that should be delayed (step 2). In this example,
The judgment is made based on the initial refrigerant temperature detected by the temperature sensor t43. Specifically, the initial refrigerant temperature is 20°C.
If the above is the case, air exhaust control in step 5 is executed immediately after startup. On the other hand, if it is below 20°C, the process proceeds to step 4, where the process waits until the temperature of the refrigerant in the water jacket 12 rises to 80°C, and then the air discharge control in step 5 is executed. When starting the engine, the system is usually filled with liquid phase refrigerant (for example, a mixture of water and antifreeze); Since the refrigerant does not move at all, only the liquid phase refrigerant in the water jacket 12 receives intensive combustion heat, and warm-up progresses rapidly. Therefore, high-temperature liquid-phase refrigerant is immediately supplied to the heat core 51, which extracts liquid-phase refrigerant from inside the walk jacket 12 and uses it as a heat source. It will be extremely good.

After the control of the air discharge section J is completed, the process proceeds to Step 6 to control the warming temperature, and thereafter the control loop of Steps 7 to 12 including temperature side control, liquid level control, etc. is repeated until the key is turned off.

In addition, in step 3, it is determined whether the startup is an initial startup or a restart based on the refrigerant temperature.
In the case of restarting, the air discharge control (step 5) is omitted because air intrusion over time is not considered.

Also, if a key OFF signal is input during the control,
The interrupt control routine shown in FIG. 4 is executed, and the key OF
After one step of processing by the F flilJ control (step 13), the power is turned off and the series of controls ends.

FIG. 6 shows a 70-chart of the air exhaust control in step 6. This is to exhaust air by completely filling the system with gold liquid phase refrigerant. As mentioned above, this is usually done immediately after startup, and at low temperatures, when the refrigerant temperature reaches 80°C. It is held at First step 31
In step 32, the first ′tL magnetic valve 36 is opened, the second solenoid valve 27 is controlled to be closed, and the flow path AJ and the 3rd magnetic valve 34 are controlled to be closed. Start driving. As a result, the liquid phase refrigerant in the reservoir pump 31 is
The refrigerant is introduced into the system via the auxiliary refrigerant passage 33fi. This is continued for a predetermined period of time in step 33, specifically for a period of several seconds to several tens of seconds, which is set in advance on the air timer (2), which is sufficient to fill the system with water. Therefore,
The air remaining in the system is collected in the upper part of the system, and then is forcibly discharged through the air discharge passage 35 to the reservoir/reservoir 31@ outside the system. Then, when a predetermined period of time has elapsed, the refrigerant supply pump 14 is turned OFF (step 34), and the temperature is cleared (step 35) L, and the process proceeds to warm-up control (step 6) shown in FIG.

By the time the warm-up control has started, the inside of the air conditioner/tub 13 is naturally filled with liquid phase refrigerant.

The heat dissipation ability of the co/capacitor 13 is suppressed to an extremely low level.

As a result, the temperature of the refrigerant within the water jacket 12 rises quickly, and lung glands eventually begin. Warm-up control basically involves waiting while keeping the lower tank % and the reservoir tank 31 in communication (step 41) until the refrigerant temperature in the water jacket 12 rises to the target temperature. In step 43, the actual detected temperature is compared with the set temperature, and when the detected temperature reaches the set temperature + 2.0°C (α3 months), the system is sealed (step 45) and this control is terminated. .The above set temperature (step 42
) is optimally set at any time depending on the operating conditions such as engine load and rotational speed, and is set, for example, within a range of about 80 to 110°C (Step 51 and Step 67 below).
, and the same at step 741C).

On the other hand, during this warm-up period, the inside of the system is open to atmospheric pressure, so if the set temperature exceeds approximately 100'C1, the liquid phase refrigerant in the system will be transferred to the reservoir tank 31 due to the generated vapor pressure. As a result, the liquid level in the water jacket 12 and the liquid level in the rotor 23 decreases excessively before the refrigerant temperature reaches the set temperature. In order to deal with this, if the liquid level of either one falls below the first liquid level control level or the second liquid level control level (if NO at step 44), immediately After sealing (step 45), this control ends.

After the warm-up control is completed, the control loop from step 7 to step 12 is repeated as described above, but this control loop performs fine temperature control by turning the cooling fan 24 on and off. The liquid level f! in step 8 is maintained to keep the liquid level in the υ water jacket 12 above the set level by controlling the fan in step 7 (Fig. 8) and circulating the liquid phase refrigerant. IJ groaning (Fig. 9) and step L1 water level lowering control (inner water level lowering control) which expands or reduces the actual heat dissipation area when the detected temperature deviates relatively greatly from the target set temperature. Figure 10 and Step L2; Water level rise control within the water level (Figure 1).

First, as mentioned above, in the warm-up control (Fig. 7), we will explain the case where the detected temperature reaches the "set temperature 10-0°C (-)" and the control loop is entered. Cause step 52. In step 53, cool 7 amps 24
At the same time as t-ON, since the upper limit temperature [set temperature +2.0° C. (α3)] in step 7 has already been exceeded, the water level lowering control within the height of 7 in FIG. 40 is immediately started.

This control to lower the water level in the co/denser is performed in step 61 by forcibly discharging the liquid phase refrigerant in the height 13 to the IJ server pump 31 using the refrigerant supply pump 14. Step 62
), which lowers the liquid level in the air conditioner/sut 13 to increase heat dissipation ability, and its discharge is performed when the detected temperature is "+1 point above the set temperature".
．． The process continues until the temperature drops to 0°C (α)J (steps 67 and 68), and finally the system is sealed (step 69) to end. The above ending temperature is the cooling fan 2
The upper limit temperature [set temperature + 2.0°C (α1)] and lower limit temperature [set temperature - 4] in step 9 are conditions that depend only on 4.
The temperature is set within the range of 0°C (α, )] and slightly higher than the set temperature, but this is done in consideration of the responsiveness of temperature changes to a drop in the liquid level. Furthermore, even during the above-mentioned refrigerant discharge, the refrigerant continues to rise in the water jacket 12, so the liquid level gradually decreases, but if the liquid level on the water jacket side falls below the set level, , the second magnetic valve 27 is temporarily switched to "flow path B", and liquid phase refrigerant is supplied from the condenser 13 to the water jacket [2 (steps 63 to 65), and the first liquid level section 42
maintain at the set level. In addition, in the event that even if the liquid level in the 3717 length 13 is lowered to the maximum, insufficient heat dissipation capacity cannot be avoided and the liquid level falls to the level set by the second liquid level 44. immediately terminates this control (step 66) in order to prevent steam from escaping.

Also, for the same reason, Conde 7 t 13 at step lO
If the liquid level inside the condenser is below the level set in the second liquid level setting "j44," the water level lowering system within the condenser height is not performed.

On the other hand, as mentioned above, when the liquid level in the differential gear 13 is properly controlled, the amount of heat generated by the engine and the amount of heat dissipated from the container 7 length 13 are approximately balanced below the boiling point, and the internal After the is sealed,
The 7A/control (step 7) shown in FIG. 8 and the liquid level control (step 8) shown in FIG. 9 are repeatedly performed. Above 7
In the 77 control system, the temperature inside the system can be measured with even higher accuracy, specifically, [set temperature + 0.5℃ (α,)] and [set temperature - α]
Only the cooling fan 24 is turned ON and OFF 111 (Steps 53 and 54) so as to maintain the temperature between 5° C. (α, )” (Step 52). In addition, in the above liquid level control, when the liquid level in the walk jacket 12 falls below the set level, liquid phase refrigerant is supplied from the 3717 length 13 side to the water jacket 12, and the liquid level is lowered to the set level V.
C is maintained (steps 55-57).

In addition, if the system temperature falls below the lower limit temperature in step 9 [set temperature -11.0℃ (α, )] due to disturbances such as an increase in vehicle running wind or changes in the set temperature itself due to changes in operating conditions. 3717 Inner water level rise control shown in factor 11 will be started. This transfers the liquid phase refrigerant in the reservoir tank 31 to the condenser i3 f! Introduced into iiil and coredair +
This is a side effect that suppresses heat dissipation ability by raising the liquid level in j13. In this embodiment, when introducing the liquid phase refrigerant, forced introduction by driving the refrigerant supply pump 14 in the same direction in the opposite direction and refrigerant introduction utilizing the pressure difference inside and outside the system are used in combination.

That is, when the inside of the system is under negative pressure Vc (step 71) according to the signal from the negative pressure switch 45, the third gage valve 34 is opened (step 72), and the system is supplied via the first auxiliary refrigerant passage 26. Refrigerant is introduced using the pressure difference between inside and outside. When this refrigerant is introduced, the detected temperature is ``set temperature, -30℃ (α,)''.
” (steps 74 and 75).
), and finally the system is sealed (step 76) and the process ends. The above-mentioned end temperature takes into consideration the responsiveness of the τ island degree change to the rise in the liquid level. If the liquid phase refrigerant in the walk jacket 12 becomes insufficient during this refrigerant introduction, the refrigerant is replenished by the refrigerant supply pump 14 (step 73, see FIG. 9).

When the inside of the system is under positive pressure or when the pressure becomes positive during the above-mentioned refrigerant introduction, the third solenoid valve 34 is closed (step 77), and the refrigerant supply pump 14 is driven in the opposite direction: Liquid phase refrigerant is forcibly introduced from the reservoir tank 31 into the condenser 13 (step 79.80).

Even in the case of this forced introduction, the detected temperature is
(α6)'' (steps 74, 75). In addition, if the liquid phase refrigerant in the water jacket 12 becomes insufficient during this refrigerant introduction, the second solenoid valve 27 is temporarily switched to the flow path BJK and the refrigerant supply pump 1
4 in the same direction and replenish the refrigerant in step 5 (step 78).
, 81 , 82 ).

As a result of the water level rise control in the cooling capacitor described above, the system temperature has been brought to the upper limit temperature to the lower limit temperature in step 9. ) is carried out.

Next, in Figure 12, the ignition key of one engine is OFF'.
This shows key OFF control (step 13) which is interrupted when operated.

First, set the temperature to 80'C (Step 9)
4) By doing this, the above-mentioned water level drop in the capacitor mlI is carried out to maximize the heat dissipation capacity of the capacitor 13, and the cooling is forced by driving the cooling 7A/24 all 1 for about 10 seconds at most. Cooling (steps 95, 95
, step 53) L, the temperature inside the system is sufficiently low (for example, l-
f'80°C] (step 93), but the system becomes a negative pressure state (step 97), or a certain amount of time (e.g. 1 minute) has passed (step 98), and the power is turned off ( Step 99).This t source is turned off.
The first electric break valve 36, which is a normally closed 9L magnetic valve, is "closed".
At this time, the third solenoid valve 34, which is a normally open type and a calm valve, is opened, so that the temperature inside the system decreases, and as the pressure decreases, the reservoir pump 31 passes through the first auxiliary cold tofu passage 26. The liquid refrigerant is naturally introduced, and eventually the entire system is filled with liquid refrigerant in preparation for the next startup.Also, when introducing the liquid refrigerant mentioned above, , capacitor 13
Since the air flows into the system through the air, even if a small amount of air enters for some reason during operation and adheres to the inside of the fine condenser tube, it can be reliably discharged to the upper part of the system.

On the other hand, the ignition key may be turned on again during the above key OFF control, but in this case, the process proceeds to step 100 based on the judgment in step 92, and based on the information saved in advance (step 91), the ignition key is turned on again. In addition to restoring the cooling 7a 724 and the set temperature, step 95
98 software timer■.

■All clear (step 101) L. Returns to the control state that was in progress before the key was turned off.

Although one embodiment of the present invention has been described above in detail, the present invention is not limited to the above embodiment.

Various forms of boiling moon:! Can be applied to cooling equipment. Furthermore, in the above embodiment, whether or not to immediately discharge υ air is determined based on the initial temperature of the refrigerant in the system. Control based on the temperature inside the factory, etc. is also possible, and in this case, an intake air temperature 77-jo for air-fuel ratio control, a temperature sensor +j for air-conditioner control, etc. can be used.

Effects of the Invention As is clear from the above explanation, the boiling cooling device for an internal combustion engine according to the present invention enables quick start and warm-up even if the engine is under extremely low temperature conditions in a cold region. In addition, when the hot water heater is used immediately after starting, rapid heating with a quick start-up can be achieved.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing the configuration of the present invention, and FIG. 2 is a configuration explanatory diagram showing one embodiment of the present invention. 3 quotient, 4, 6, 6, 7, 8, 9, 10, 11, and 12 show the details of control in this embodiment. -It's Tiyat. l...Refrigerant uk ring group, 2...Walk jacket, 3...Condenser, 4...Reservoir tank, 5...
... Refrigerant supply valve, 6... Air discharge passage, 7...
Opening/closing valve, 8...Air exhaust itf control means, 9...Delay means, LO...Temperature detection means, 11...Internal combustion engine, 12...Water jacket, 13...Contents, 14. ... Refrigerant supply pump, 23 ... Lower tank, 24 ... Cooling 7-amp, 25 ... Refrigerant circulation passage, 26 ... First auxiliary refrigerant passage, 27 ... Second solenoid valve, 31. ...Reservoir tank, 33...Second auxiliary refrigerant passage, 34...Third electromagnetic box, 35...Air discharge passage, 36...1st m magnetic valve, 41...:il+lJ i
Wholesale 5! i*, 42-1st liquid level safety height, 43...
temperature sensor. 44...Second liquid level sensor height, 45...Negative pressure switch,
51... Heater core, 55... Heater pump. Figure 5 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] (1) A sealed refrigerant circulation system consisting mainly of a water jacket in which liquid phase refrigerant is stored and a condenser that condenses generated vapor, and a preliminary liquid phase provided outside of this refrigerant circulation system, and a preliminary liquid phase for air discharge. a reservoir tank storing refrigerant; a refrigerant supply pump provided between the reservoir tank and the refrigerant circulation system; one end connected to the top of the refrigerant circulation system, and the other end connected to the reservoir tank; an air exhaust passage connected to the air exhaust passage, an on-off valve installed in the air exhaust passage, and when the engine is started, the on-off valve is opened for a period of time and the refrigerant supply pump is driven to supply a liquid phase into the refrigerant circulation system. air exhaust control means for introducing refrigerant;
A boiling cooling device for an internal combustion engine, comprising a delay means for delaying the start of operation of the air discharge control means at low temperatures based on temperature conditions such as internal system temperature or outside temperature.