JP3312460B2 - Vehicle heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for a vehicle which can perform immediate heating during a heating operation by utilizing heat energy of cooling water stored in a heat retaining tank.

[0002]

2. Description of the Related Art Conventionally, as a heating device for a vehicle provided with a heat retaining tank, for example, there is one as disclosed in Japanese Patent Application Laid-Open No. 2-120120. This is because, in a heating device that circulates cooling water heated by a water jacket of a water-cooled engine through a heater core and heats the interior of the vehicle, the cooling water heated by the water jacket is stored in a heat retention tank and its thermal energy is Is used, for example, immediately after starting the engine, an immediate heating operation can be performed, or an immediate warming operation of the engine can be performed.

In this case, the heat retention tank is provided in a cooling water circulation path, and is, for example, a container made of metal or resin and having a double wall structure, and a heat insulating tank such as a polyurethane foam is provided between the double walls. The material is filled to enhance the heat retention effect.

[0004]

However, in the configuration described above, the heat retaining tank is provided in the cooling water circulation path. Therefore, when the cooling water is circulated, the cooling water always passes through the heat retaining tank. Will circulate. Therefore, when performing the immediate effect heating operation or the immediate effect warm-up operation, when the cooling water in the heat retention tank flows out and is circulated,
The low-temperature cooling water remaining in the parts other than the heat retention tank flows into the heat retention tank and is replaced, so that immediate effect heating and immediate effect warm-up operation are performed. The cooling water returns to the heat retention tank again, and instead, the low-temperature cooling water flows again to the circulation path.

That is, since the high-temperature cooling water stored in the heat-retaining tank and the low-temperature cooling water remaining in the circulation path are mixed, the overall temperature is reduced, and the instantaneous heating effect is reduced. There is a problem that the efficiency of the operation and the immediate warm-up operation is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently utilize the heat energy of cooling water stored in a heat retaining tank to efficiently perform an immediate heating operation or an immediate warm-up operation. It is an object of the present invention to provide a heating device for a vehicle that can perform well.

[0007] A vehicle heating apparatus according to the present invention comprises a water-cooled engine mounted on a vehicle, a ventilation duct for sending air toward a vehicle interior, air passing through the ventilation duct, and cooling water for the engine. A heat exchange tank for temporarily exchanging heat between the heat exchanger, a heat retaining tank for temporarily storing cooling water, and a first cooling water path for circulating the cooling water for the engine through the heat exchanger and the heat retaining tank. And a second circulating the cooling water for the engine through the heat retention tank.
A cooling water path, and a third cooling water path for circulating cooling water flowing out of the heat retention tank through the heat exchanger;
A tank bypass cooling water passage through which cooling water flows so as to bypass the heat retaining tank, the first, second, and third cooling water passages;
A cooling water path switching valve device provided at a branch portion of the cooling water path for selectively switching the cooling water paths; a tank switching valve device for selectively enabling the tank bypass cooling water path; By driving the switching valve device as necessary , the high-temperature cooling water is stored in the heat retaining tank .
Activate the tank bypass with enough
The hot water in the heat retention tank is released to each of the paths
High-temperature storage and storage means that substantially prevents
In, the hot water in the heat retention tank
Activate the tank bypass with circulating discharge
And remove the cold water remaining in the passage before discharging.
Cooling water is stored in the heat retention tank to allow
Means for preventing cold water circulation which substantially prevents circulation
This is characterized in that the control means is provided.

In the above configuration, there is provided detecting means for detecting that the amount of cooling water stored in the heat retaining tank has reached a predetermined amount during the immediate effect operation, and the control means controls the immediate effect operation. Preferably, when a detection signal is given from the detection means, the tank switching valve device is driven to switch to the tank bypass cooling water path.

The detecting means may comprise a water temperature sensor for detecting a temperature of the cooling water flowing out of the heat retaining tank, and a judging means for judging that the temperature detected by the water temperature sensor has changed by a predetermined temperature or more. .

[0010] Further, the detecting means may be a measuring means for measuring a time from the time when the immediate effect operation is started, and a predetermined amount of time measured by the measuring means may be used to determine whether a predetermined amount of the cooling water is used. And determination means for determining that the number has reached.

In each of the above constructions, a radiator for cooling by exchanging heat with outside air when the cooling water for the engine is circulated, and a radiator bypass cooling water passage for circulating the cooling water so as to bypass the radiator. A thermostat that is provided in a cooling water path from the engine to the radiator and that diverts the cooling water to the radiator bypass cooling water path when the temperature of the cooling water is equal to or lower than a predetermined temperature; and that the radiator bypass cooling water path can be opened and closed. A radiator switching valve device, wherein the control means closes the radiator bypass cooling water path by closing the radiator switching valve device during an immediate operation in which the cooling water is circulated to the engine side, and flows out of the engine. The cooling water to be discharged into the first or second cooling water path. It can be.

[0012]

According to the vehicle heating apparatus of the first aspect, when the cooling water path switching valve device is switched to select the first cooling water path, the cooling water heated by the engine is heated. Since it circulates through the exchanger, the cooling energy of the cooling water exchanges heat with the air passing through the ventilation duct, thereby enabling a heating operation, and circulating through the heat retention tank, so that it is temporarily stored. This makes it possible to perform a water storage operation that saves the heat energy.

When the second cooling water path is selected, the cooling water for the engine flows into the heat retaining tank and the cooling water stored in the heat retaining tank is supplied to the engine side. Therefore, when the temperature of the cooling water in the heat retention tank is high, the warm-up operation of the engine as an immediate effect operation using the heat energy can be quickly performed.

When the third cooling water path is selected, the cooling water in the heat retention tank is circulated through the heat exchanger, and the heat energy of the cooling water is used for the immediate operation. Can be operated immediately.

When the above-described water storage operation is performed by driving the tank switching valve device as required by the control means, the cooling water is sufficiently stored in the heat insulation tank by the high-temperature storage and storage means. If the tank bypass cooling water path is activated after the state, the cooling water stored in the heat retention tank can be prevented from being released to the cooling water path again. For cooling water circulation prevention
More, after a state in which cooling water is stored in the heat insulation tank is sufficiently circulated in the cooling water passage is released,
If the tank bypass cooling water path is activated, the cooling water released from the heat retention tank can be circulated in the cooling water path to use the heat energy, and the cooling water remaining in the cooling water path before discharging can be used. Cooling water stored in the heat retention tank
By doing so, it is possible to prevent mixing with the cooling water circulating in the path, so that the immediate operation can be performed more effectively.

According to the vehicle heating device of the second aspect,
When the detecting means detects that the usage amount of the cooling water stored in the heat retaining tank has reached a predetermined amount during the immediate effect operation, the control means drives the tank switching valve device to switch to the tank bypass cooling water path. Thereafter, the water storage operation and the immediate effect operation can be executed in a state in which the cooling water flowing into and out of the heat retaining tank is shut off and the thermal efficiency is improved, and the heat energy of the cooling water can be effectively used. .

According to the vehicle heating device of the third aspect,
At the time of immediate operation, the cooling water stored in the heat retention tank is circulated to the heat exchanger or the engine side to use the heat energy, so the temperature of the cooling water remaining in the cooling water path before operation is It is common that the temperature is different from a predetermined temperature or more.At the time of the immediate effect operation, the temperature of the cooling water flowing out of the heat retaining tank is detected by the water temperature sensor, and the detection temperature of the water temperature sensor changes by the predetermined temperature or more by the determination unit. When the determination is made, the control means can detect that the cooling water stored in the heat retaining tank has almost been released.

If the control means drives the tank switching valve device to flow the cooling water through the tank bypass cooling water path, the low-temperature cooling water remaining in the cooling water path is transferred to the heat retaining tank. It is possible to circulate through the cooling water path as a state of being replaced with high-temperature cooling water inside the vehicle, and to use the heat energy efficiently, for example, to quickly warm up the engine and perform immediate warm-up operation or cabin interior Can be efficiently performed, such as an immediate heating operation that quickly heats the air.

According to the vehicle heating device of the fourth aspect,
When the cooling water stored in the heat retaining tank flows out, since the flow rate per unit time is substantially constant, the total outflow amount is obtained by the outflow time. Measure the time from when the cooling water started to flow out of the heat retention tank, by the determination means,
When it is determined that the usage amount of the cooling water has reached the predetermined amount based on the lapse of the predetermined time period measured by the measurement unit, the control unit drives the tank switching valve device in the same manner as described above. If the cooling water flows through the tank bypass cooling water passage, the low-temperature cooling water remaining in the cooling water passage is replaced with the high-temperature cooling water in the heat retention tank, and the cooling water is passed through the cooling water passage. It is possible to circulate and efficiently use the heat energy to efficiently carry out immediate operation such as immediate warm-up operation to quickly warm up the engine and immediate heating operation to quickly heat the passenger compartment. Will be able to

According to the vehicle heating device of the fifth aspect,
During an immediate operation in which the cooling water in the heat retaining tank is circulated to the engine side by the control means, the radiator switching valve device is closed to close the radiator bypass cooling water path, and the cooling water flowing out of the engine is discharged to the first side. Alternatively, since the cooling water is discharged to the second cooling water path, the low-temperature cooling water remaining in the engine section before operation is stored in the heat retaining tank without being mixed into the engine section again through the radiator bypass cooling water path. However, the high-temperature cooling water in the heat retaining tank can be circulated to the engine side, and the immediate operation of quickly warming up the engine using the heat energy can be efficiently performed.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a vehicle air conditioner will be described below with reference to FIGS. FIG. 1 shows the overall block configuration. The main components of an air conditioner 1 are a water-cooled engine 2 mounted on an automobile, which is a vehicle, and an air conditioner for sending conditioned air to a vehicle compartment (not shown). A duct 3, a blower 4 disposed in the ventilation duct 3, a refrigeration cycle 5 for circulating a coolant for cooling, a cooling water circuit 7 for circulating cooling water through a water jacket 6 of the engine 2, and an air conditioner to be described later. A control circuit 8 for performing control;

The air conditioning duct 3 has an outside air inlet 10 and an inside air inlet 11 which are switched by an inside / outside air switching damper 9 upstream of the air conditioning duct 3, and a blower 4 is disposed downstream thereof. When driven, inside air or outside air is sucked. This blower 4 has a fan 4
a and a fan motor 4b. The drive of the fan motor 4b is controlled by a control circuit 8.

An evaporator 12 constituting the refrigeration cycle 5 is provided downstream of the blower 4, and cools the air passing therethrough. Although not shown, the refrigeration cycle 5 has a well-known configuration including a compressor, a refrigerant condenser, a liquid receiver, a refrigerant decompression device, and the like, in addition to the evaporator 12, and uses the refrigerant flowing through the evaporator 12 by these components. It allows cooling.

The evaporator 12 of the air conditioning duct 3
An air mix damper 13 is arranged on the downstream side, and sets and distributes the amount of air that passes through the heater core 14 out of the air that has passed through the evaporator 12. Heater core 14
Functions as a heat exchanger in which cooling water is circulated from the engine 2 side. Downstream of the heater core 14, a defrost air outlet 15, a face air outlet 16 and a foot air outlet 17 are provided corresponding to each part in the vehicle cabin, and the respective air outlets are provided by dampers 18, 19 and the like. Is to be adjusted.

Next, in the engine 2, the water jacket 6 is provided with a water pump 20 driven by the rotational force of the engine 2 on the cooling water inlet 6 a side,
A cooling water circuit 7 is connected to the outlet 6b.
The water jacket 6 has an outlet 6c connected to the radiator 21 and an outlet 6d connected to the radiator bypass cooling water path 22.

When the temperature of the cooling water flowing out of the water jacket 6 is equal to or lower than a predetermined temperature, the thermostat 23 closes the outlet 6c so that the cooling water circulates through the radiator bypass cooling water passage 22. When the temperature of the water exceeds a predetermined temperature, the outlet 6c is opened and the radiator 2 is opened.
1 also operates so that the cooling water flows out. Radiator 2
A fan 24 for cooling the cooling water flowing inside is disposed in the portion 1 and is driven by the rotational force of the engine 2.

The radiator bypass cooling water path 22
Is provided with a radiator electromagnetic valve 22a as a radiator switching valve device, and is controlled to be switched by the control circuit 8 as described later. In this case, as the radiator solenoid valve 22a, an on-off valve type is used in the present embodiment, but a linear solenoid solenoid valve capable of variably controlling the valve opening can also be used.

The cooling water circuit 7 is configured as follows. That is, the water jacket 6 of the engine 2
The cooling water flow path 7a is connected to the outflow port 6b, and an electromagnetic three-way valve 25 as a cooling water path switching valve device is connected to the end of the cooling water flow path 7a. One outlet of this electromagnetic three-way valve 25 is connected to the inlet of the heater core 14 via a cooling water flow path 7b, and the other outlet is connected to a tank solenoid valve 26 as a tank switching valve device via a cooling water flow path 7c. It is connected.

The heat retaining tank 27 is a container made of metal or resin and has a double wall structure. The gap between the double walls is filled with a heat insulating material such as polyurethane foam. The pipe 27a is opened near the inner bottom of the container, and the outflow pipe 27b is opened on the upper side in the container. Then, when the cooling water flows in through the inflow pipe 27a, the cooling water is gradually stored from the inner bottom side, and the cooling water stored in the inside is gradually reduced from the upper side through the outflow pipe 27b. Becomes outflow.

The heat retaining tank 27 is capable of storing approximately the same amount (for example, 4 liters) of cooling water as the cooling water remaining in the cooling water circuit 7. When the outside air temperature is 0 ° C., the cooling water having a water temperature of 85 ° C. is left to stand for 12 hours, and then has a capability of keeping the temperature at about 78 ° C.

The inflow pipe 27a of the heat retaining tank 27 is
An electric water pump 28 is connected to one outlet of the tank solenoid valve 26 and is connected to the other outlet of the tank solenoid valve 26 and is electrically driven.
Is connected to the cooling water flow path 7d via the. A portion where the other outlet of the tank electromagnetic valve 26 and the outflow pipe 27b are connected is a tank bypass cooling water path 29.

The leading end of the cooling water passage 7d is connected to one inlet of an electromagnetic four-way valve 30 as a cooling water path switching valve device. A cooling water flow path 7 e is connected to the outlet side of the heater core 14, and the other end side is connected to one inlet / outlet of the electromagnetic four-way valve 30. The other inlet of the electromagnetic four-way valve 30 is connected to the outlet of the radiator 21 and the radiator bypass cooling water passage 22, and the other inlet and outlet of the water jacket 6 d via the water pump 20. It is connected to the.

The first cooling water passage referred to in the present invention is the cooling water passage 7a, 7b, 7c, 7d, 7 described above.
e is formed in a state where the cooling water flows through any of the
Is formed in a state where the cooling water flows through the cooling water flow paths 7a, 7c and 7d, and a third cooling water path is formed in a state where the cooling water flows through the cooling water flow paths 7d, 7e, 7b and 7c. Is done.

The control circuit 8 functions as a control means, and comprises a microcomputer, a ROM, a RAM, and the like, and stores an air conditioning control program therein. The control circuit 8 is supplied with power from the on-vehicle battery 31, and its input / output terminals are the fan motor 4b of the blower 4, the radiator solenoid valve 2
2a, an electromagnetic three-way valve 25, a tank electromagnetic valve 26, an electric water pump 28 and an electromagnetic four-way valve 30, and a room temperature sensor 32 for detecting the temperature Tr in the vehicle compartment,
A first water temperature sensor 33a for detecting the temperature Tw1 of the cooling water in the water jacket 6, a second water temperature sensor 33b for detecting the temperature Tw2 of the cooling water in the cooling water passage 7e, and the cooling water flowing through the cooling water passage 7d. Is connected to a third water temperature sensor 34 as a detecting means for detecting the temperature Ts of the water.

In this case, the first water temperature sensor 33a detects the temperature Tw of the cooling water in the water jacket 6 of the engine 2.
1 outputs a detection signal to the control circuit 8 when it exceeds 110 ° C., for example, and the second water temperature sensor 33b detects that the temperature Tw2 of the cooling water in the cooling water flow path 7e is 40 ° C., for example. , A detection signal is output to the control circuit 8.

The control circuit 8 includes an on-board battery 31.
, A fan switch 36 and a mode changeover switch 37 are connected via an ignition switch 35.
An air conditioner switch 38 is connected from the vehicle-mounted battery 31 via an ignition switch 35 and a fan switch 36, and these switches 35 to 38 are connected.
Is detected.

FIGS. 2 to 6 show the structure of the electromagnetic three-way valve 25. The outer container 39 having a cylindrical inner wall is shown in FIGS.
Is provided with openings 39a, 39b, 39c on three sides (see also FIG. 4). A cylindrical inner container 40 is vertically movably inserted into the outer container 39.
A magnetic body 41 is connected and fixed to the upper surface of the inner container 40, and an electromagnetic coil 4 disposed above the outer container 39.
2 (see FIG. 3) is inserted through a compression coil spring 43.

When the electromagnetic coil 42 is energized by a control signal from the control circuit 8, the magnetic material 41 is moved by the attractive force against the urging force of the compression coil spring 43 to move the inner container 41 to the upper ON position. being adapted to move, each opening 39a of the opening of the on-position path 40a having an opening on three sides and an outer container 39, 39 b, become 39c match, the energization is stopped The biasing force of the compression coil spring 43 is maintained at the lower off position, and the opening of the off position path 40b having two openings and the openings 39a and 39c of the outer container 39 match.
Then, the inner container 41 is configured to establish a conductive state between the cooling water flow paths 7a, 7b, and 7c at the off position (see FIG. 5), and to establish a conductive state between the cooling water flow paths 7a and 7c at the on position (see FIG. 6). It has become.

FIGS. 7 to 11 show the structure of the electromagnetic four-way valve 30. The outer container 44 having a cylindrical inner wall has openings 44a, 44b, 44c, 44 in four directions.
d is provided (see also FIG. 9). This outer container 44
A cylindrical inner container 45 is vertically movably inserted into the inside of the container.
Are connected and fixed, and are inserted through a compression coil spring 48 into an electromagnetic coil 47 (see FIG. 8) disposed above the outer container 44.

When the electromagnetic coil 47 is energized by a control signal from the control circuit 8, the magnetic force is applied to the magnetic container 46 by the attraction force of the compression coil spring 48 to move the inner container 45 to the upper ON position. The opening of the ON position path 45b having two openings and the openings 44a, 44d of the outer container 44 coincide with each other, and the ON position path 45b having two openings. The openings are aligned with the openings 44b and 44c of the outer container 44. When the power supply is stopped, the openings 44b and 44c are held at the lower OFF position by the urging force of the compression coil spring 48, and the OFF position has openings in four directions. The openings of the passage 45c and the openings 44a to 44d of the outer container 44 match each other.

Then, the inner container 45 is in the off position (FIG. 1).
0), between the cooling water flow paths 7d and 7e, the outlet side of the radiator 21, and the water pump 20 of the water jacket 6.
The inflow ports are connected to each other at the ON position (FIG. 1).
1), the conduction is established in all four directions.

Next, the operation of this embodiment, while referring to the flow chart of the control program of FIG. 12, to 13 not be explained by using a flow path diagram of Figure 17. Here, description of the content of control of the amount of power to the fan motor 4b of the blower 4 by the control circuit 8 will be omitted.

When the control circuit 8 is supplied with power from the vehicle battery 31, the control program shown in FIG. 12 is executed by interruption every predetermined time. When the program is started, first, at step S1, the ignition switch is turned on. It is determined whether or not 35 is turned on. If there is no input signal, "NO" is determined, the process proceeds to step S2, and the program is terminated after executing the stop processing routine.

In this stop processing routine, the control circuit 8 stops the electric water pump 28 and turns off the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30 to turn off the inner containers 40 and 45. Will be held.

Next, if "YES" is determined in the step S1, the control circuit 8 proceeds to a step S3,
The detection signals of the room temperature sensor 32, the first water temperature sensor 33, and the second water temperature sensor 34 are input, and signals from the air conditioner switch 38 and the mode switch 36 are read.

In step S4, the control circuit 8 determines whether the temperature Tr in the vehicle compartment detected by the room temperature sensor 32 is equal to the upper limit value TR of the room temperature set value by the air conditioning setting means (not shown).
U (for example, 20 ° C.),
O ”, that is, the room temperature Tr is TRU (= 20
° C) or less, the process proceeds to step S5. In the next step S5, the control circuit 8 determines whether or not the detected vehicle interior temperature Tr is lower than the room temperature set value TRL (for example, 10 ° C.). If the temperature is lower than the preset temperature TW2 (for example, 40 ° C.), it is determined whether or not the detection signal is output when the temperature Tw2 detected by the second water temperature sensor 33b exceeds the set temperature TW2 (eg, 40 ° C.).

The control circuit 8 determines "YE" in step S6.
If "S" is determined, that is, if the temperature Tw2 of the cooling water in the cooling water flow path 7e exceeds the set temperature TW2 (= 40 ° C.), the process proceeds to Step S7 to execute a heating / heat storage operation routine described later. After that, the program is terminated.

In this case, in the heating / heat storage operation routine, the control circuit 8 drives the electric water pump 28, turns off the electromagnetic three-way valve 25, and turns off the electromagnetic four-way valve 30.
Will be turned on. By performing the heating / heat storage operation routine, high-temperature cooling water is circulated through the heater core 14 to perform the heating operation, and to perform the heating operation.
The heat storage operation in which high-temperature cooling water is stored in 7 is performed.

When it is determined "NO" in step S6, that is, when the temperature Tw2 of the cooling water in the cooling water passage 7e is determined.
Is equal to or lower than the set temperature TW2 (= 40 ° C.), the control circuit 8 determines in step S8 that the mode switch 37
Is determined to be in the engine warm-up operation mode. If "YES" is determined here, the process proceeds to step S9 to execute an immediate warm-up operation routine to be described later. Is determined, the process proceeds to step S10, and an immediate effect heating operation routine to be described later is executed.

In this immediate warm-up operation routine, the control circuit 8 drives the electric water pump 28, turns on both the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30, and further controls the radiator electromagnetic valve 22a. Is driven to close the radiator bypass cooling water path 22. By executing the immediate warm-up operation routine, the engine can be quickly warmed up even when the outside air is at a low temperature. In the immediate heating operation routine, the control circuit 8 drives the electric water pump 28 and turns on both the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30. By executing the immediate heating operation routine, the vehicle interior can be quickly heated.

Then, the control circuit 8 executes the above-described step S
9 or S10, the process proceeds to step S11, where the cooling water flow path 7 output from the third water temperature sensor 34
The value of the detected temperature Ts of the cooling water in d is inputted, and it is determined whether or not the detected temperature Ts is lower than a set temperature TS (for example, 30 ° C.). If “YES” is determined, step S12 is performed. Then, the tank solenoid valve 26 is driven to activate the tank bypass cooling water path 29, and the program is terminated. If "NO" is determined, the program is terminated.

When the tank bypass cooling water passage 29 is activated, the cooling water flowing from the cooling water passage 7c into the heat retaining tank 27 bypasses the heat retaining tank 27 and is directed to the tank bypass cooling water passage 29 side. Then, the cooling water flows into the cooling water flow path 7d, and the cooling water that has flowed into the heat retaining tank 27 up to that point is temporarily stored therein.

Then, in step S5, "NO"
If it is determined that the room temperature Tr is equal to or higher than TRL, the control circuit 8 proceeds to step S13, executes an air conditioning stop processing routine, and ends the program. In this case, the control circuit 8 stops the electric water pump 28 and turns off the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30 in the air-conditioning stop processing routine, similarly to the stop processing routine in step S2. Each of the inner containers 40, 45 is held at the off position.

Next, in step S4, "YES"
That is, when the room temperature Tr is TRU (= 20
° C), the control circuit 8 determines in step S1
Then, the process proceeds to 4 to determine whether the air conditioner switch 38 is turned on. Here, the control circuit 8
When the determination is "NO", the process shifts to the above-described step S13 to execute the air-conditioning stop processing step and terminate the program.

If the air conditioner switch 38 is turned on, the control circuit 8 proceeds to step S15, and the value of the detected temperature Tw1 of the cooling water in the water jacket 6 by the first water temperature sensor 33a is set to the set temperature. TW1
(For example, 110 ° C.).
If "O" is determined, the process proceeds to step S16, executes the cooling / cooling operation routine, and ends the program.
If "YES" is determined, that is, if the overheating state is determined, the process shifts to step S17 to execute the emergency cooling operation routine and end the program.

In this case, in the cooling / cooling operation routine, the control circuit 8 drives the electric water pump 28 and turns off the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30 to remove the inner containers 40 and 45. It will be held in the off position. By performing the cooling / cooling operation routine, low-temperature cooling water is circulated through the heater core 14 to perform cooling operation efficiently, and a cold-storage operation in which low-temperature cooling water is stored in the heat retaining tank 27 is performed. Become like

In the emergency cooling operation routine,
The control circuit 8 drives the electric water pump 28 and turns on both the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30. By executing the emergency cooling operation routine, the low-temperature cooling water stored in the heat retaining tank 27 is efficiently circulated in the water jacket 6 to quickly cool the engine 2.

Next, the flow path and operation of the cooling water in each of the above-described operation routines will be described in detail with reference to FIGS. (A) Heating / heat storage operation (Step S7) In this case, the electric water pump 28 is driven, the electromagnetic three-way valve 25 is turned off, and the electromagnetic four-way valve 30 is turned off.
Is in the ON position, the cooling water flowing out of the water jacket 6 of the engine 2 circulates in the first cooling water path according to the present invention. That is, as shown by solid-line arrows A1 to A11 in FIG.
flow through the heater core 14 via the flow paths a and 7b and return to the water jacket 6 through the cooling water flow path 7e (arrows A1 to A6); and flow through the cooling water flow paths 7a and 7c to the heat retaining tank 27 side. After returning to the water jacket 6 via the cooling water flow path 7d (arrows A1, A7 to A1).
1, A6) are formed.

Accordingly, the high-temperature cooling water heated by the engine 2 and flowing out of the water jacket 6 is heated by exchanging heat with the air flowing through the ventilation duct 3 when flowing through the heater core 14. As a result, the heating operation is performed, and the cooling water flowing in the heat retaining tank 27 is temporarily stored therein, and the stored cooling water is kept warm.

The high-temperature cooling water in the water jacket 6 is also circulated to the radiator 21 side. When the water temperature is higher than the operating temperature of the thermostat 23, the cooling water flows through the radiator 21 and is cooled. When the temperature of the cooling water becomes equal to or lower than the operating temperature of the thermostat 23, the outlet 6c is closed, so that the cooling water bypasses the radiator 21 and flows through the radiator bypass cooling water path 22. It returns to the water jacket 6.

(B) Immediate warm-up operation (step S9) In this case, the electric water pump 28 is driven, and the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30 are both set to the ON position. Since the radiator bypass cooling water path 22 is closed, the cooling water flowing out of the water jacket 6 circulates through the second cooling water path according to the present invention. That is, as shown by solid-line arrows B1 to B7 in FIG. 14, a flow path that flows to the heat retention tank 27 through the cooling water flow paths 7a and 7c and then returns to the water jacket 6 through the cooling water flow path 7d is formed. Will be done.

As a result, the high-temperature cooling water stored in the heat retaining tank 27 flows through the water jacket 6 to heat the engine 2, while remaining in the water jacket 6 and in the cooling water channels 7 a and 7 c. The low-temperature cooling water that has been stored in the heat retention tank 27 can efficiently warm up the engine 2 without mixing the cooling waters having different temperatures.

In this case, since the radiator bypass cooling water passage 22 is also closed, the low-temperature cooling water remaining in the water jacket 6 is transferred to the water jacket 6 via the radiator bypass cooling water passage 22. Since only the high-temperature cooling water from the heat retaining tank 27 can be supplied into the water jacket 6 without returning, the warm-up operation of the engine 2 can be performed quickly.

As described above, when the value of the temperature Ts detected by the third water temperature sensor becomes lower than the set temperature TS (= 30 ° C.), the control circuit 8 executes step S12 to execute the tank solenoid valve. 26 is driven and the heat retention tank 2
Since the flow path to the side 7 is closed and the tank bypass cooling water path 29 is validated, at this time, the flow paths (arrows B3 and B4) passing through the heat retaining tank 27 pass through the tank bypass cooling water path 29. The flow path is changed to a flow path (arrow B8 indicated by a broken line in the figure).

That is, since all the high-temperature cooling water in the heat retaining tank 27 has flowed out, the low-temperature cooling water remaining in the cooling water flow path before operation starts flowing again from the heat retaining tank 27. Was detected to be starting
Thereafter, the supply of the cooling water from the heat retaining tank 27 is stopped, and only the high-temperature cooling water circulating in the cooling water flow path is circulated. Therefore,
As a result, only the high-temperature cooling water is supplied to the water jacket 6.
, The efficiency of the immediate warm-up operation can be prevented from lowering.

(C) Immediate heating operation (Step S10) In this case, the electric water pump 28 is driven, and the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30 are in the off positions. The cooling water that flows out circulates through the third cooling water path according to the present invention. That is, solid arrows C1 to C in FIG.
As shown by 7, a flow path is formed that flows to the heater core 14 side through the cooling water flow paths 7d and 7e and then returns to the heat retaining tank 27 through the cooling water flow path 7b.

As a result, when the high-temperature cooling water stored in the heat retaining tank 27 flows through the heater core 14, it exchanges heat with the air flowing through the ventilation duct 3 and heats it. The heating operation can be performed, while the low-temperature cooling water remaining in the heater core 14 and the cooling water passages 7d, 7e, 7b, 7c before the operation is stored in the heat retaining tank 27. Therefore, the heating operation can be efficiently performed without mixing these.

As described above, when the value of the temperature Ts detected by the third water temperature sensor becomes lower than the set temperature TS (= 30 ° C.), the control circuit 8 executes step S12 and executes the tank solenoid valve. 26 is driven and the heat retention tank 2
7 is closed and the tank bypass cooling water path 29 is activated. At this time, the flow path (arrows C7 and C1) passing through the heat retaining tank 27 passes through the tank bypass cooling water path 29. The flow path is changed to a flow path (arrow C8 shown by a broken line in the figure).

That is, since all the high-temperature cooling water in the heat retaining tank 27 has flowed out, the low-temperature cooling water remaining in the cooling water flow path before the operation is again circulated out of the heat retaining tank 27. Was detected to be starting
Thereafter, the supply of the cooling water from the heat retaining tank 27 is stopped, and only the high-temperature cooling water circulating in the cooling water flow path is circulated. Therefore,
As a result, only the high-temperature cooling water is supplied to the water jacket 6.
, The efficiency of the immediate warm-up operation can be prevented from lowering.

On the engine 2 side, since the electromagnetic four-way valve 30 is in the off position, the cooling water in the water jacket 6 does not flow out to the cooling water flow path 7a, and the radiator 21 and the radiator Circulation is performed only on the bypass cooling water path 22 side.

(D) Cooling / cooling operation (step S16) In this case, the electric water pump 28 is driven, and the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30 are in the off positions. The cooling water flowing out of the cooling water circulates through the third cooling water path according to the present invention. That is, solid arrows D1 to D1 in FIG.
As shown by 7, a flow path is formed that flows to the heater core 14 side through the cooling water flow paths 7d and 7e and then returns to the heat retaining tank 27 through the cooling water flow path 7b.

At this time, when the air conditioner switch 38 is turned on and the cool storage operation mode is set, the air mix damper 13 is fully opened, that is, all the air cooled through the evaporator 12 is heated by the heater core. Since the cooling water is circulated to the side of the heater core 14, the cooling water circulated to the heater core 14 is cooled by performing heat exchange with the air cooled here.

As a result, the cooling water cooled by the heater core 14 flows through the cooling water passages 7b and 7c to the heat retaining tank 27.
Is temporarily stored in the refrigerator, whereby the cold storage operation is performed.

When the cooling operation is performed, the low-temperature cooling water stored in the heat-retaining tank 27 as described above is passed through the third cooling water path to the heater core 14, thereby providing ventilation. In the duct 3, the evaporator 12
The air cooled by passing through the heater core 14 can be further cooled and blown out as low-temperature air into the passenger compartment by the heater core 14. The immediate cooling operation can be performed in response to the case where the room is to be cooled. The flow path of the cooling water on the water jacket 6 side is the same as the flow path during the immediate heating operation.

(E) Emergency cooling operation (Step S17) In this case, the electric water pump 28 is driven, and the electromagnetic three-way valve 25 and the electromagnetic four-way valve 30 are both set to the ON position. Since the bypass cooling water path 22 is closed, the cooling water flowing out of the water jacket 6 circulates through the second cooling water path according to the present invention. That is, as shown by solid-line arrows E1 to E7 in FIG. 17, a flow path that flows to the heat retention tank 27 through the cooling water flow paths 7a and 7c and then returns to the water jacket 6 through the cooling water flow path 7d is formed. Will be done.

Thus, the low-temperature cooling water stored in the heat retaining tank 27 flows through the water jacket 6 to cool the engine 2, while remaining in the water jacket 6 and in the cooling water passages 7 a and 7 c. Since the high-temperature cooling water exceeding 110 ° C. is stored in the heat retention tank 27, the engine 2 can be efficiently and quickly cooled without mixing the cooling waters having different temperatures.

In this case, since the radiator bypass cooling water path 22 is also closed, the high-temperature cooling water remaining in the water jacket 6 is transferred to the water jacket 6 via the radiator bypass cooling water path 22. Since only low-temperature cooling water from the heat retaining tank 27 can be supplied into the water jacket 6 without returning, the cooling operation of the engine 2 can be performed quickly.

According to this embodiment, the tank bypass cooling water passage 29 connected so that the cooling water bypasses the heat retaining tank 27 is provided between the cooling water passages 7c and 7d connected to the heat retaining tank 27. In addition to the solenoid valve for tank 2
6, the tank bypass cooling water path 29 is made effective, so that when performing warm-up operation or heating operation using the heat energy of the high-temperature cooling water stored in the heat retention tank 27, In addition, the warm-up operation and the heating operation can be quickly performed without lowering the thermal efficiency such as lowering the temperature by mixing with the low-temperature cooling water remaining in the cooling water path before the operation.

Further, according to the present embodiment, when the detection temperature Ts of the third water temperature sensor 34 becomes lower than the set temperature TS (= 30 ° C.), the high-temperature cooling water stored in the heat retaining tank 27 Is detected, and the cooling water is circulated by switching to the tank bypass cooling water path 29, so that the heat energy of the high-temperature cooling water is effectively used while the simple structure is used, and the immediate warm-up is performed. Operation and immediate heating operation can be performed.

According to this embodiment, the radiator solenoid valve 22a is closed during the warm-up operation so that the cooling water in the water jacket 6 is prevented from circulating through the radiator bypass cooling water passage 22. As a result, the high-temperature cooling water supplied from the heat retention tank 27 and the low-temperature cooling water remaining in the water jacket 6 before operation are prevented from mixing, and the heat energy is effectively used to quickly start the engine 2. Will be able to warm up.

In the above embodiment, the case where the tank solenoid valve 26 is driven on the condition that the temperature Ts detected by the third water temperature sensor 34 becomes equal to or lower than the set temperature TS has been described. Not limited to, for example,
The condition may be that the change in the detected temperature Ts for a predetermined time is, for example, 5 ° C./sec or more.

In the above embodiment, the third water temperature sensor 34 is provided as the water temperature sensor. However, the present invention is not limited to this. For example, the first water temperature sensor 33a or the second water temperature sensor 33b may be used. Similarly, the end of the discharge of the high-temperature cooling water in the heat retaining tank 27 can be determined. In this case, the third water temperature sensor 34 can be omitted.

In the above embodiment, the outflow of the high-temperature cooling water in the heat retaining tank 27 is detected using the third water temperature sensor 34. However, the present invention is not limited to this. It may be configured to measure the time from the start and the outflow amount from the product of the flow amount by the conductive water pump 28.

Further, in the above embodiment, the flow path is connected to either the heat retaining tank 27 side or the tank bypass cooling water path 29 side by the tank solenoid valve 26. However, the present invention is not limited to this. For example, by arranging the coolant at a predetermined ratio, the temperature of the coolant flowing out of the heat retaining tank 27 to the coolant channel 7d can be controlled. Further, for example, a similar effect can be obtained by providing a configuration in which a mode for distributing to each one and a mode for distributing simultaneously to both are provided.

[0085]

As described above, according to the vehicle heating device of the present invention, the following effects can be obtained.
In other words, according to the vehicle heating device of the first aspect, a tank bypass cooling water path for circulating the cooling water so as to bypass the heat retaining tank is provided, and tank switching for selectively enabling the tank bypass cooling water path. Provide a valve device,
Control means drives the tank switching valve device as required
High-temperature storage and storage means
Activate the tank bypass with sufficient water collection
The hot water in the thermal insulation tank to be discharged to each channel.
And prevent cold water circulation,
And the warm water in the thermal insulation tank was sufficiently circulated and discharged to each path.
Activate the tank bypass in the condition and leave it in the path before discharging.
Storing the retained cold cooling water in the heat retention tank
To substantially prevent cold cooling water from circulating in the path.
Therefore, when performing the water storage operation, after the cooling water has been sufficiently stored in the heat retention tank, if the tank bypass cooling water path is enabled, the cooling water stored in the heat retention tank can be activated. Water can be prevented from being released again to the cooling water path, and when performing immediate operation, the cooling water stored in the heat retention tank is released and circulated sufficiently to each cooling water path. After that, if the tank bypass cooling water path is activated, the cooling water discharged from the heat retention tank can be circulated in the cooling water path to use the heat energy thereof, and the cooling water can be cooled before discharging. Cooling water remaining in the channel is stored in the heat retention tank and cold
Since it can be prevented from being circulated inside, an excellent effect of being able to perform the immediate effect operation more effectively is exhibited.

According to the vehicle heating device of the second aspect,
Detecting means is provided to detect that the usage amount of the cooling water stored in the heat retaining tank has reached a predetermined amount during the immediate operation, and the control means drives the tank switching valve device to control the tank bypass cooling water path. Since it was switched,
The water storage operation and the immediate effect operation can be performed in a state in which the cooling water flowing into and out of the heat retaining tank is shut off and the thermal efficiency is improved, and an excellent effect that the heat energy of the cooling water can be effectively used is exhibited. .

According to the vehicle heating device of the third aspect,
At the time of immediate operation, the cooling water stored in the heat retention tank is circulated to the heat exchanger or the engine side to use the heat energy, so the temperature of the cooling water remaining in the cooling water path before operation is Utilizing the fact that the temperature is different from the predetermined temperature or more, the temperature of the cooling water flowing out of the heat retention tank is detected by the water temperature sensor during the immediate effect operation, and the detection temperature of the water temperature sensor is changed by the determination means by the predetermined temperature or more. Is determined so that the control means can detect that the cooling water stored in the heat retaining tank has almost been released, and the control means drives the tank switching valve device to If the cooling water flows through the tank bypass cooling water path, the low-temperature cooling water remaining in the cooling water path is replaced with the high-temperature cooling water in the heat retention tank. It is possible to circulate in the recirculating water path, and to use the heat energy efficiently, for example, for immediate warm-up operation for quickly warming up the engine and for immediate effect such as immediate heating operation for quickly heating the vehicle interior. It has an excellent effect that the operation can be efficiently performed.

According to the vehicle heating device of the fourth aspect,
When the cooling water stored in the heat retaining tank flows out, since the flow rate per unit time is substantially constant, the total outflow amount is obtained by the outflow time. Measure the time from when the cooling water started to flow out of the heat retention tank, by the determination means,
Since the configuration is such that it is determined that the usage amount of the cooling water has reached the predetermined amount when the time measured by the measuring means has passed the predetermined time, in the same manner as described above,
If the control means drives the tank switching valve device to flow the cooling water through the tank bypass cooling water path, the low-temperature cooling water remaining in the cooling water path can be replaced with the high-temperature cooling water in the heat retaining tank. The cooling water can be circulated in the cooling water path in a state where it has been replaced, and the thermal energy is efficiently used, for example, the immediate effect of quickly warming up the engine or the immediate effect of quickly heating the vehicle interior This provides an excellent effect that an immediate operation such as a heating operation can be efficiently performed.

According to the vehicle heating device of the fifth aspect,
During an immediate operation in which the cooling water in the heat retaining tank is circulated to the engine side by the control means, the radiator switching valve device is closed to close the radiator bypass cooling water path, and the cooling water flowing out of the engine is discharged to the first side. Alternatively, since the cooling water is allowed to flow out to the second cooling water path, the low-temperature cooling water remaining in the engine section before operation is not mixed into the engine section again through the radiator bypass cooling water path, and is stored in the heat retaining tank. While storing
The high-temperature cooling water in the heat retaining tank can be circulated to the engine side, and an excellent effect that an immediate operation in which the engine is quickly warmed up by utilizing the heat energy can be efficiently performed can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an overall configuration showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a three-way valve.

FIG. 3 is a longitudinal sectional side view of a three-way valve.

FIG. 4 is a cross-sectional plan view of the outer container of the three-way valve.

FIG. 5 is a cross-sectional plan view showing the off position of the inner container of the three-way valve.

FIG. 6 is a cross-sectional plan view of the ON position of the inner container of the three-way valve.

FIG. 7 is an exploded perspective view of a four-way valve.

FIG. 8 is a longitudinal sectional side view of a four-way valve.

FIG. 9 is a cross-sectional plan view of the outer container of the four-way valve.

FIG. 10 is a cross-sectional plan view of the off position of the inner container of the four-way valve.

FIG. 11 is a cross-sectional plan view of the ON position of the inner container of the four-way valve.

FIG. 12 is a flowchart of a control program.

FIG. 13 is an explanatory diagram of a cooling water path during heating / heat storage operation.

FIG. 14 is an explanatory diagram of a cooling water path during an immediate warm-up operation.

FIG. 15 is an explanatory diagram of a cooling water path during an immediate heating operation.

FIG. 16 is an explanatory diagram of a cooling water path during cooling / cooling operation.

FIG. 17 is an explanatory diagram of a cooling water path during an emergency cooling operation.

[Explanation of symbols]

1 is an air conditioner (vehicle heating device), 2 is an engine, 3 is a ventilation duct, 4 is a blower, 5 is a refrigeration cycle, 6 is a water jacket, 7 is a cooling water circuit, 8 is a control circuit (control means), 9 Is an inside / outside air switching damper, 12 is an evaporator,
13 is an air mix damper, 14 is a heater core (heat exchanger), 20 is a water pump, 21 is a radiator, 22
Is a radiator bypass cooling water path, 22a is a radiator solenoid valve (radiator switching valve device), 23 is a thermostat, 25 is an electromagnetic three-way valve (cooling water path switching valve device),
26 is a solenoid valve for a tank (tank switching valve device), 27 is a heat retention tank, 28 is an electric water pump, 29 is a cooling water path for a tank bypass, 30 is an electromagnetic four-way valve (cooling water path switching valve apparatus), and 31 is a vehicle mounted. Battery, 32 is a room temperature sensor,
33a is a first water temperature sensor, 33b is a second water temperature sensor, 34 is a third water temperature sensor (detection means), 35 is an ignition switch, 36 is a fan switch, 37 is a mode switch, and 38 is an air conditioner switch. .

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsumi Inoue 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (72) Inventor Koji Nonoyama 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Nihon Denso Co., Ltd. (56) References JP-A-2-120120 (JP, A) JP-A-3-7614 (JP, A) JP-A-57-114712 (JP, A) JP-A-57-90206 (JP, A) 62-72204 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60H 1/08

Claims (5)

(57) [Claims] 1. A water-cooled engine mounted on a vehicle, a ventilation duct for sending air toward a vehicle interior, and heat exchange between air passing through the ventilation duct and cooling water of the engine. A heat exchanger to be performed, a heat retention tank for temporarily storing cooling water, a first cooling water path for circulating the engine cooling water through the heat exchanger and the heat retention tank, and a cooling for the engine. A second cooling water path for circulating water through the heat retaining tank, a third cooling water path for circulating cooling water flowing out of the heat retaining tank through the heat exchanger, and cooling water to bypass the heat retaining tank And a cooling water path switching valve provided at a branch portion of the first, second and third cooling water paths for selectively switching the cooling water paths. A location, a tank switching valve device to selectively enable the tank bypass coolant passage, by driving according to this tank switching valve device required, the hot of the cooling water is sufficiently to the heat retaining tank Marble
Activate the tank bypass and keep warm
Substantially prevent the hot water in the tank from being discharged to each of the above paths.
High temperature storage and storage means to prevent
The warm water in the heat storage tank is sufficiently circulated and discharged to each of the above paths.
Activate the tank bypass with the
The cooling water remaining on the road is
Circulates cold cooling water through the passage
Control means having a cooling water circulation preventing means for substantially preventing the cooling water circulation . 2. A detecting means for detecting that a usage amount of cooling water stored in the heat retaining tank has reached a predetermined amount during the immediate operation, and wherein the control means includes the detecting means during the immediate operation. 2. The vehicle heating device according to claim 1, wherein when a detection signal is given from the controller, the tank switching valve device is driven to switch to the tank bypass cooling water path. 3. The detecting means comprises a water temperature sensor for detecting a temperature of cooling water flowing out of the heat retaining tank, and a judging means for judging that the temperature detected by the water temperature sensor has changed by a predetermined temperature or more. The heating device for a vehicle according to claim 2, wherein: 4. The detecting means comprises: measuring means for measuring a time from the time when the immediate effect operation is started; and when the time measured by the measuring means elapses a predetermined time, the usage amount of the cooling water is reduced. 3. The vehicle heating device according to claim 2, further comprising a determination unit configured to determine that the predetermined amount has been reached. 5. A radiator for cooling by performing heat exchange with outside air when the cooling water for the engine is circulated, a radiator bypass cooling water passage for flowing the cooling water so as to bypass the radiator, and A thermostat that is provided in a cooling water path leading to the radiator and that bypasses the cooling water to the radiator bypass cooling water path when the temperature of the cooling water is equal to or lower than a predetermined temperature; and a radiator switching valve device that can open and close the radiator bypass cooling water path. The control means, at the time of immediate operation to circulate the cooling water to the engine side, closes the radiator bypass cooling water path by closing the radiator switching valve device, the cooling water flowing out of the engine 2. The cooling water passage according to claim 1, wherein the cooling water is discharged to the first or second cooling water path. 2, 3 or 4 vehicle heating apparatus according.