JPH02120120A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To reduce the number of part items as well as to aim at the promotion of low-unit cost of production by constituting each of first to third cooling water routes, circulating engine cooling water into a heat exchanger and/or a heat reserving tank, so as to be selectively transferred by a multidirectional valve of more than a three-way valve. CONSTITUTION:In an air-conditioning unit 1 consisting of a refrigerating cycle 4 where a refrigerant circulates, and a cooling water circuit 5 where cooling water of a water-cooled engine 10, a cooling water circuit 5 is made up of installing each of first to fourth cooling water routes 52-55. The first cooling water route 52 is constituted of making the engine cooling water circulate through a heater core 51 and a heat reserving tank 56, while the second cooling water routes 53 is constituted of making the water circulate through the heat reserving tank 56 alone. In addition, as for the third cooling water route 54, it is constituted of making the cooling water out of the heat reserving tank 56 circulate through the heater core 51 alone. With this constitution, these first to third cooling water routes 52-54 should be transferred by a three-way valve 6 installed in their branched part in a selective manner.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention makes it possible to perform immediate heating during heating operation by using the heat retained in the cooling water in the heat insulation tank heated by the overjacket of the engine. Regarding air conditioners for automobiles that can be used.

[Prior Art] Traditionally, as a heating method for the interior of a car, engine cooling water heated by the engine's water jacket flows into a hot water type heater core, and the engine cooling water and air passing through a ventilation duct are heated. was exchanging heat with. For this reason, especially immediately after starting the engine in cold weather, the temperature of the engine cooling water is low, so the air passing through the ventilation duct is not heated much, causing the occupants to feel cold.

In order to solve this problem, an inlet and an outlet are provided upstream and downstream of the heater core, and an insulating tank is installed to keep the cooling water that has flowed into the inside warm, and an auto pump is installed to pump the cooling water in the insulating tank to the heater core. A heating device for an automobile has been devised that is provided with a cooling water flow path and can perform an immediate heating operation in which high-temperature cooling water in a heat insulating tank is supplied to a heater core only when the engine is started.

Further, a heating device for a vehicle has been devised that can perform an engine warmer operation in which the engine is warmed by supplying high-temperature cooling water in a heat insulating tank to the engine only when the engine is started.

[Problems to be Solved by the Invention] However, in the automotive heating device 100 that can perform both immediate heating operation and engine warmer operation, as shown in FIG. Thermal storage operation (solid arrow) that supplies heated high-temperature cooling water, the immediate heating operation (dashed arrow) that supplies high-temperature cooling water in the heat retention tank 110 to the heater core 130, and the high-temperature cooling water in the heat retention tank 110 Three types of operation patterns are required: an engine warmer operation (-point line arrow) that supplies the engine 120 with the engine 120; For this reason,
In order to switch these efficiently and reliably, at least three or more electromagnetic on-off valves 141, 142, and 143 are required, which poses a problem in that the number of parts is large and the cost is high.

The present invention provides an air conditioner for an automobile that can reduce the number of parts by switching between a first cooling water path, a second cooling water path, and a third cooling water path with a multi-way valve that is more than a three-way valve. The purpose is to provide a harmonization device.

[Means for Solving the Problems] The automotive air conditioner of the present invention includes a water-cooled engine mounted on an R1 vehicle, a ventilation duct for sending air toward the passenger compartment, and air passing through the ventilation duct. a heat exchanger that exchanges heat between air and cooling water of the engine; a heat retention tank that retains heat of the cooling water that has flowed into the interior; and a heat retention tank that circulates the cooling water that has flowed out from the engine to the heat exchanger and the heat retention tank. a first cooling water path; a second cooling water path for circulating the cooling water flowing out from the engine to the heat retention tank; and a third cooling water path for circulating the cooling water flowing out from the heat retention tank to the heat exchanger. a water path, provided at a branching portion of the first cooling water path, the second cooling water path, and the third cooling water path, the first cooling water path and the second cooling water path; and the third cooling water path.

[Function] The automotive air conditioner of the present invention has the following function due to the above configuration.

By selectively switching a multi-way valve or more than a three-way valve provided at a branch part between a first cooling water path, a second cooling water path, and a third cooling water path, the cooling water flowing out from the water-cooled engine is removed. A first cooling water path that circulates water to the heat exchanger and the heat retention tank; a second cooling water path that circulates the cooling water that flows out of the engine to the heat retention tank; and a second cooling water path that circulates the cooling water that flows out from the heat retention tank to the heat exchanger. It is possible to selectively switch between the cooling water path and the third cooling water path.

When the cooling water path is switched to the first cooling water path by a multi-way valve or more, a heat storage operation is performed in which cooling water heated by the engine is stored in a heat retention tank and kept warm.

Further, when the cooling water path is switched to the second cooling water path by a multi-way valve or more, an operation is performed in which the cooling water kept warm in the heat insulation tank is supplied to the engine.

When switched to the third cooling water path by a multi-way valve or more, the cooling water kept warm in the heat retention tank is supplied to the heat exchanger to exchange heat with the air passing through the ventilation duct. It will be done.

[Effects of the Invention] The automotive air conditioner of the present invention has the following effects due to the above configuration and operation.

Switching between the first cooling water path, the second cooling water path, and the third cooling water path can be performed using a multi-way valve, so the number of parts can be reduced and costs can be reduced. It is possible to provide an air conditioner for automobiles.

[Example] A first example of the automotive air conditioner according to the present invention will be described with reference to FIGS. 1 to 12.

FIG. 1 shows an automotive air conditioning system employing a first embodiment of the present invention.

1 indicates a heating and cooling system for an automobile.

The air conditioning system 1 is a water-cooled engine 1 installed in a car.
0, a ventilation duct 2 for sending air into the vehicle interior (not shown), and a blower 3 housed in the ventilation duct 2.
, a refrigeration cycle 4 in which refrigerant circulates, a cooling water circuit 5 in which cooling water for the engine 10 circulates, an electromagnetic three-way valve 6 provided in the blower 3 and the cooling water circuit 5, and an electromagnetic four-way valve as a multi-directional valve. A control circuit 8 is provided to control the valve 7.

The ventilation duct 2 has an inside air inlet 22 or an outside air inlet 23 that is switched by an inside/outside air switching damper 21 upstream, and a window outlet 24, an upper body outlet 25, and a foot outlet 26 in the downstream. In addition, ventilation duct 2
Inside, there is an air blower 1i13 and a refrigerant evaporator 4 of the refrigeration cycle 4.
1, an air mix damper 27, a heater core 51 of the cooling water circuit 5, and outlet mode switching dampers 28 and 29 are housed.

Here, when the air-conditioning device 1 is to be operated in a heat storage operation, an immediate heating operation, a cold storage operation, or an immediate cooling operation, the air mix damper 27 is fully opened, and the air passing through the ventilation duct 2 and the cooling water in the heater core 51 are mixed. exchange heat.

The blower 3 includes a fan 31 that introduces inside air or outside air through the inside air inlet 22 or the outside air inlet 23 and generates an air flow toward the vehicle interior in the ventilation duct 2, and an electric motor 32 that drives the fan 31. .

The refrigeration cycle 4 includes a refrigerant evaporator 41, a refrigerant compressor (not shown), a refrigerant condenser (not shown), and a liquid receiver (not shown).
, a refrigerant pressure reducing device (not shown), and a refrigerant pipe 42 that sequentially connects these in an annular manner.

The coolant circuit 5 is used to cool the engine 10 and circulately supplies coolant heated within the oak jacket 11 to the heater core 51 and the like.

This cooling water circuit 5 includes a first cooling water path (solid line arrow shown) 52, a second cooling water path (shown - dotted chain arrow) 53,
It includes a third cooling water path (indicated by a dashed line arrow in the drawing) 54 and a fourth cooling water path (indicated by a two-dot chain arrow in the drawing) 55.

The first cooling water path 52 supplies cooling water flowing out from the water jacket 11 of the engine 10 to the heater core 51 by the action of the water pump 12 and the electric water pump 57.
This is a route for circulating the heat to the heat insulating tank 56, and this route is normally used during heating operation.

The second cooling water path 53 is a path for circulating cooling water flowing out from the water jacket 11 of the engine 10 by the action of the water pump 12.57 to the heat retention tank 56.

The third cooling water path 54 carries the cooling water flowing out from the heat insulating tank 56 by the action of the auto bomb 57 to the heater core 5.
1.

The fourth cooling water path 55 is a path for circulating cooling water flowing out from the water jacket 11 of the engine 10 by the action of the auto pump 12 to the radiator 13 and a bypass flow path 58 that bypasses the radiator 13. A thermostat 59 is provided in the fourth cooling water path 55, and if the temperature of the cooling water is higher than the set temperature of the thermostat 59, the cooling water is cooled through the radiator 13. Further, when the temperature of the cooling water is lower than the set temperature of the thermostat 59, the cooling water is returned to the overjacket 1-11 of the engine 10 through the bypass passage 58.

During the first cooling water path 52, the cooling water heated by the water jacket 11 of the engine 10 is transferred to the heat retention tank 56.
A heat storage operation is performed in which heat is stored and kept warm inside.

During the second cooling water path 53, an engine warmer operation is performed in which high temperature cooling water kept warm in the heat insulation tank 56 is supplied to the overjacket 11 of the engine 10.

Alternatively, an engine emergency cooling operation is performed in which low-temperature cooling water kept warm in the heat insulating tank 56 is supplied to the water jacket 11 of the engine 10.

During the third cooling water route 54, an immediate heating operation is performed in which high temperature cooling water kept warm in the heat insulation tank 56 is supplied to the heater core 51 and heat is exchanged with the air passing through the ventilation duct 2. . Alternatively, a cold storage operation is performed in which the cooling water cooled by the heater core 51 is stored in the heat retention tank 56 and kept warm. Alternatively, low-temperature cooling water kept warm in the heat retention tank 56 may be supplied to the heater core 51 and the ventilation duct 2
Immediate cooling operation is performed by exchanging heat with the air passing through.

The heat retention tank 56 is made of metal or resin and has a double wall structure, and a heat insulating material such as polyurethane foam is filled between the walls of the double wall structure tank.

The heater bomb 57 is energized by the control circuit 8 only when the cooling water is circulating in the first cooling water path 52, the second cooling water path 53, and the third cooling water path 54.
Cooling water is allowed to flow into the heat retaining tank 56 and cooling water is allowed to flow out from the heat retaining tank 56.

The three-way valve 6 is provided at a branch point between the first cooling water path 52, the second cooling water path 53, and the third cooling water path 54. As shown in FIGS. 2 to 6, this three-way valve 6 includes an outer container 61, an inner container 62 fitted into the outer container 61 so as to be able to reciprocate, and a coil portion that drives the inner container 562. It consists of 63.

The outer container 61 has a cylindrical shape and includes a first boat 64 communicating with the water jacket 11 of the engine 10 and a heater core 5.
A second port 65 communicating with the heat insulating tank 56 and a third boat 66 communicating with the heat insulating tank 56 are formed on the same horizontal plane. The inner container 62 has a substantially cylindrical shape, and has a T-shaped flow path 67 on the upper side and a horizontal letter-shaped flow path 68 on the lower side. The coil portion 63 is energized and controlled by the control circuit 8 .

Here, when the coil portion 63 is energized, each boat 64, 65, 66 of the outer container 61 matches the flow path 68 of the inner container 62, and the second cooling water path 53 is formed. Furthermore, when the current to the coil section 63 is stopped,
Each boat 64, 65, 66 of the outer container 61 and the inner container 6
The two flow paths 67 match, and the first cooling water path 52 or the third cooling water path 54 is configured. 60 is a return spring.

The four-way valve 7 is provided at a branch portion between the first cooling water path 52, the second cooling water path 53, the third cooling water path 54, and the fourth cooling water path 55. As shown in FIGS. 7 to 11, this four-way valve 7 includes an outer container 11 and an inner container 72 fitted into the outer container 71 so as to be able to reciprocate.
, and a coil section 13 that drives the inner container 72.

The outer container 71 has a cylindrical shape and includes a first boat 74 communicating with the overjacket 11 of the engine 10 and a heater core 5.
1, a third boat 76 that communicates with the heat retention tank 56, and a fourth boat 76 that communicates with the radiator 13.
A boat 71 is formed on the same horizontal plane.

The inner container 72 has a substantially cylindrical shape, and has substantially V-shaped channels 78a and 78b that do not intersect with each other on the upper side, and an alligator-cross-shaped channel 79 on the lower side. The coil portion 73 is energized and controlled by the control circuit 8 .

Here, when the coil part 73 is energized, each boat 14, 75, 76, 77 of the outer container 71 and the inner container 7
The second cooling water path 79 coincides with the first cooling water path 52 or the second cooling water path 53, and the fourth cooling water path 55 is configured. Furthermore, when the coil section 73 is not energized, the flow path 78a of the inner container 72 and the first boat 74 are connected to each other.
and the fourth boat 77 match, and the flow path 78b
The second boat 75 and the third boat 76 match, and the third
A cooling water path 54 and a fourth cooling water path 55 are configured. 70 is a return spring.

The control circuit 8 includes a room temperature sensor 81, a first water temperature sensor 82,
Signals from the second water temperature sensor 83, air conditioner switch 84, mode changeover switch 85, ignition switch 86, and fan switch 87 are input. Therefore, the control circuit 8 energizes (ON) the electric motor 32, the coil portion 63 of the three-way valve 6, the coil portion 73 of the four-way valve 7, and the water pump 57 in response to the signals from the sensors and switches described above. Stop (offa).

The room temperature sensor 81 is a thermistor disposed inside the vehicle interior, and sends the temperature inside the vehicle interior to the control circuit 8 as a resistance value.

The first water temperature sensor 82 is disposed in the cooling water pipe between the four-way valve 7 and the heater core 51, and sends a signal to the control circuit 82 when the temperature of the cooling water in the cooling water pipe exceeds 40°C.
send to

The second water temperature sensor 83 detects the temperature of the cooling water inside the oak jacket 11 of the engine 10 . This second water temperature sensor 83 sends a signal to the control circuit 8 when, for example, the temperature of the cooling water in the oak jacket 11 exceeds 110°C.

The air conditioner switch 84 is a switch that starts the refrigeration cycle 4. The mode changeover switch 85 is a switch that selects the engine warmer operation mode when it is ON, and selects the immediate heating operation mode when it is OFF. Ignition switch 86 is a switch that starts engine 10. The fan switch 87 is connected to the fan 31
This is a switch that starts the electric motor 32 of.

FIG. 12 shows an operation flowchart of the control circuit 8 of this embodiment, where the control of the amount of current applied to the electric motor 32 is omitted.

First, it is determined whether the ignition switch 86 is turned on (step S1). If the ignition switch 86 is not turned on (NO), the water pump 57, the coil part 63 of the three-way valve 6, and the four-way valve 7 The coil section 73 is turned off (step S2).

Thereafter, control is interrupted until the ignition switch 86 is turned on.

In step S1, when the ignition switch 86 is turned on (Yes), signals from the room temperature sensor 81, the first water temperature sensor 82, the second water temperature sensor 83, the air conditioner switch 84, and the mode changeover switch 85 are read (step S3 ).

Then, the temperature inside the vehicle detected by the room temperature sensor 81 (
It is determined whether T, ) exceeds the set room temperature (for example, 20 degrees Celsius) (step s4). If T+>20 degrees Celsius (No), the vehicle interior temperature ('l 'l) is lower than the set room temperature (for example, 10°C) (step S51°'1''+<10°C)
(Yes), the temperature ('rw) of the cooling water in the cooling water pipe between the four-way valve 7 and the heater core 51, detected by the first water temperature sensor 82, is the set temperature (for example, 40°C).
It is determined whether or not it exceeds (step S6).

When T is >40°C (Yes), the tsuotabompu 57
Then, the coil portion 73 of the four-way valve 7 is turned OWL, and the coil portion 63 of the three-way valve 6 is turned OFF (step S7).
The heating and cooling device 1 performs heat storage operation, then step 81
Repeat the following control.

In step S6, it is determined whether the mode changeover switch 85 is set to the engine warmer operation mode (step S8). If the engine warmer operation mode is set (Yes), the water pump 57, the three-way valve 6 and the coil portion 73 of the four-way valve 7 are turned on (step S9). For this reason, the air conditioning system 1 performs an engine warmer operation, and then repeats the control from step 81 onwards.

In step S8, when the engine warmer operation mode is not set and the mode selector switch 85 is set to the immediate heating operation mode (NO), the water pump 57 is turned ONL, the coil part 63 of the three-way valve 6 and the four-way The coil portion 13 of the valve 7 is turned off (step 310), so that the cooling system 1 performs an immediate heating operation.
The control from step 81 onwards is repeated.

In step S5, T is not <10°C (No)
When the temperature is 10° C.≦]゛ and ≦20° C., the water pump 57, the coil portion 63 of the three-way valve 6, and the coil portion 73 of the four-way valve 7 are turned off (step 511).

Thereafter, the control from step 81 onwards is repeated.

In step S4, 'l'+>20°C (Ye
S), it is determined whether the air conditioner switch 84 is turned on or not (step 512).
is not turned on (No), the process advances to step S11.

When the air conditioner switch 84 is turned on (Yes),
It is determined whether the temperature (Tll) of the cooling water in the oak jacket 11 of the engine 10 detected by the second water temperature sensor 83 exceeds a set temperature (for example, 110° C.) (step 513).

'riI> When the temperature is not 110°C (NO), the water pump 57 is turned on, and the coil part 63 of the three-way valve 6 and the coil part 73 of the four-way valve 7 are turned off (step 514).
Therefore, the air-conditioning device 1 performs a cold storage operation or an immediate cooling operation, and then repeats the control from step 81 onwards.

In step S13, Tv > 110°C (
If Yes), the water pump 57, the coil part 63 of the three-way valve 6, and the coil part 73 of the four-way valve 7 are turned on (step 515). Therefore, the air-conditioning system 1 performs an emergency engine cooling operation, and then steps 81 and subsequent steps are performed. Repeat the control.

The operation of the automotive air conditioning system 1 of this embodiment will be explained based on FIGS. 1 to 6.

<Heat storage operation) When the coil part 63 of the three-way valve 6 is turned off, the outer container 6
1 of each boat 64, 65, 66 and the channel 6 of the inner vessel 62
7 matches. Furthermore, the coil portion 73 of the four-way valve 7 is
N, each boat 74, 75, 76 of the outer container 71
．． 77 and the flow path 79 of the inner container 72 match.

Therefore, in the air-conditioning device 1, the three-way valve 6 and the four-way valve 7 switch the cooling water circuit 5 to the first cooling water path 52 and the fourth cooling water path 55, as indicated by solid arrows in FIG.

Therefore, the high-temperature cooling water heated within the two-eater jacket 11 of the engine 10 flows out from the two-eater jacket 11 of the engine 10 and is circulated and supplied to the heater core 51 and the heat insulating tank 56. The high temperature cooling water that has flowed into the heater core 51 heats the air passing through the ventilation duct 2 in the heater core 51 .

Furthermore, the high temperature cooling water that has flowed into the heat retention tank 56 is kept warm within the heat retention tank 56 .

Further, if the high temperature cooling water is higher than the set temperature of the thermostat 59, it passes through the radiator 13 and is cooled and returns to the engine jacket 11, and if the temperature is lower than the set temperature, it passes through the bypass flow path 58 and returns to the engine 10.
It is returned to Notsu Ota Jacket 11.

(Engine warmer operation) When the coil portion 63 of the three-way valve 6 is turned on, the outer container 61
each boat 64, 65, 66 and the channel 68 of the inner vessel 62.
matches. Furthermore, the coil portion 73 of the four-way valve 1 is turned ON.
Then, each boat 74, 75, 76 .
77 and the flow path 79 of the inner container 72 match.

Therefore, in the air conditioning system 1, the three-way valve 6 and the four-way valve 1 switch the cooling water circuit 6 to the second cooling water path 53 and the fourth cooling water path 55, as shown by the dashed line in FIG. .

Therefore, the high-temperature cooling water kept warm in the heat retention tank 56 flows out from the heat retention tank 56 and is supplied to the overjacket 11 of the engine 10, thereby heating the engine 10.

Therefore, the engine 10 can be quickly warmed up by supplying the high temperature cooling water in the heat insulating tank 56 to the engine 10 when starting the engine 10 especially in cold weather.

The operation of the fourth cooling water path 55 is the same as that of the heat storage operation, so the explanation will be omitted.

(Immediate heating operation) When the coil portion 63 of the three-way valve 6 is turned off, the outer container 6
1 of each boat 64, 65, 66 and the channel 6 of the inner vessel 62
7 matches. Furthermore, the coil portion 73 of the four-way valve 7 is
F", the flow path 78a of the inner container 72 matches the first boat 74 and the fourth boat 77, and the flow path 7
8b matches the second boat 75 and third boats I to 76.

Therefore, in the air conditioning system 1, the three-way valve 6 and the four-way valve 7 switch the cooling water circuit 5 to the third cooling water path 54 and the fourth cooling water path 55, as shown by the broken line in FIG.

Therefore, the high-temperature cooling water kept warm in the heat retention tank 56 flows out from the heat retention tank 56 and is supplied to the heater core 51, thereby heating the air passing through the ventilation duct 2. Therefore, when starting the engine 10 especially in cold weather, by supplying the high temperature cooling water in the heat insulating tank 56 to the heater core 51, the air blown into the vehicle interior can be quickly warmed.

The operation of the fourth cooling water path 55 is the same as that of the heat storage operation, so the explanation will be omitted.

(Cold storage operation) When the coil part 63 of the three-way valve 6 is turned off, the outer container 6
1 of each boat 64, 65, 66 and the channel 6 of the inner vessel 62
7 matches. Furthermore, the coil portion 73 of the four-way valve 7 is
When FF is performed, the flow path 78a of the inner container 72 matches the first boat 74 and the fourth boat 77, and the flow path 78a matches the first boat 74 and the fourth boat 77.
8b, the second boat 75, and the third boat 76 match.

Therefore, in the air conditioning system 1, the three-way valve 6 and the four-way valve 7 switch the cooling water circuit 5 to the third cooling water path 54 and the fourth cooling water path 55, as shown by the broken line arrows in FIG. .

At this time, the air conditioner switch 84 is turned on and the air mix damper 27 is fully opened, so low-temperature air cooled by the refrigerant evaporator 41 is blown onto the heater core 51. The cooling water passing through the heater core 51 is cooled by low-temperature air. Also, three-way valve 6
The flow path 67 of the inner container 62 is connected to the first boat 64 which communicates with the overjacket 11 of the engine 10. Since the cycle is configured, the cooling water flowing out from the water jacket 11 of the engine 10 does not flow into the third cooling water path 54.

Therefore, the low-temperature cooling water cooled within the heater core 51 flows out of the heater core 51 and flows into the heat retention tank 56. The low temperature cooling water that has flowed into the heat retaining tank 56 is kept warm within the heat retaining tank 56.

The operation of the fourth cooling water path 55 is the same as that of the heat storage operation, so the explanation will be omitted.

(Immediate cooling operation) When the coil part 63 of the three-way valve 6 is closed, the outer container 61
each boat 64, 65, 66 and the channel 67 of the inner vessel 62
matches. Furthermore, the coil portion 73 of the four-way valve 1 is OF
When the flow path 78a of the inner container 72 and the first boat 7
4 and the fourth boat 77 match, and the flow path 78
b matches the second boat 75 and the third boat 76.

Therefore, in the air conditioning system 1, the three-way valve 6 and the four-way valve 7 switch the cooling water circuit 5 to the third cooling water path 54 and the fourth cooling water path 55, as shown by the broken line arrows in FIG. .

Therefore, the low-temperature cooling water kept warm in the heat-retaining tank 56 flows out from the heat-retaining tank 56 and is supplied to the heater core 51, thereby further cooling the air blown out from the refrigerant evaporator 41. Therefore, by supplying the low-temperature cooling water in the heat retention tank 56 to the heater core 51 especially during the C7 period of cooling operation in midsummer, the air blown into the vehicle interior can be quickly cooled.

The operation of the fourth cooling water path 55 is the same as that of the heat storage operation, so the explanation will be omitted.

(Engine emergency cooling operation) When the coil portion 63 of the three-way valve 6 is turned on, the outer container 61
, each boat 64, 65, 66 and the channel 6 of the inner vessel 62.
8 matches. Furthermore, the coil portion 73 of the four-way valve 7 is
N, each boat 74, 75, 76 of the outer container 71
．． 77 and the flow path 79 of the inner container 72 match.

Therefore, in the air conditioning system 1, the three-way valve 6 and the four-way valve 7 switch the cooling water circuit 5 to the second cooling water path 53 and the fourth cooling water path 55, as shown by the dashed line in FIG. .

Therefore, the low temperature cooling water kept warm in the heat retention tank 56 flows out from the heat retention tank 56 and is supplied to the water jacket 11 of the engine 10 to cool the engine 10.

Therefore, by supplying the low-temperature cooling water in the heat insulating tank 56 to the engine 10, especially when the engine 10 is overheating, the engine 10 can be quickly cooled, which is very safe.

The operation of the fourth cooling water path 55 is the same as that of the heat storage operation, so the explanation will be omitted.

In other words, switching between heat storage operation, engine warmer operation, immediate heating operation, cold storage operation, immediate cooling operation, and engine emergency cooling operation, which conventionally required three electromagnetic on-off valves, can now be performed using two three-way valves 6 and four-way valves. 7, it is possible to reduce the number of parts and provide a low-cost automobile air-conditioning device 1.

FIGS. 13 to 16 show an automotive air conditioning system adopted in a second embodiment of the present invention.

(Same as the first embodiment - the same functional parts are given the same numbers) In this embodiment, two three-way valves 6.9 are used to connect the first cooling water path 52, the second cooling water path 53, and the third cooling water path. This is an automotive air conditioning system 1 that selectively switches between a route 54 and a route 54.

The three-way valve 9 includes an outer container 91, an inner container 92 fitted into the outer container 91 so as to be able to reciprocate, and a coil portion (not shown) for driving the inner container 92.

As shown in FIG. 14, the outer container 91 is cylindrical and has a first boat 94 communicating with the overjacket 11 of the engine 10, a second boat 95 communicating with the heater core 51, and a third boat communicating with the heat retention tank 56. A boat 96 is formed on the same horizontal plane. The inner container 92 has a substantially cylindrical shape,
As shown in FIGS. 15 and 16, a T-shaped channel 97 is formed on the upper side, and a horizontal channel 98 is formed on the lower side.
is formed.

FIGS. 17 to 19 show an automotive air conditioning system adopted in a third embodiment of the present invention.

In this embodiment, the three-way valve 6 of the second embodiment is replaced with a T-shaped flow path 6.
As shown in FIGS. 17 to 19, the three-way valve 9 of the second embodiment can be omitted by rotating the inner container 62 forming the three-way valve 7 into three set positions. Can be done. Therefore, one three-way valve 6 connects the first cooling water path 52, the second cooling water path 53, and the third cooling water path 5.
4 can be selectively switched.

As another embodiment, the three-way valve 9 of the second embodiment can be rotated so that the inner container 92 in which the T-shaped flow path 97 is formed is moved to three set positions. The three-way valve 6 can be omitted.

[Other Examples] In this example, the automobile air conditioner of the present invention was adopted as an automobile air conditioner. It's okay.

In this embodiment, the second cooling water route was used for the engine warmer operation and the engine emergency cooling operation, but the second cooling water route was used for either the engine warmer operation or the engine emergency cooling operation. It's good to have.

In this embodiment, the third cooling water path was used for immediate heating operation, cold storage operation, and immediate cooling operation, but the third cooling water path was used for either immediate heating operation, cold storage operation, or immediate cooling operation. It is good if there is.

In this example, the three-way valve, four-way valve, and electric heater bomb were controlled by the control circuit according to the sensors and switches. The three-way valve, the four-way valve, and the electrically operated two-way valve may be controlled by the control circuit according to the blowing temperature from the heater core.

In this embodiment, the flow rate control was not performed using an electric water pump, but the flow rate control may be performed using an electric water pump. For example, in the case of the third cooling water path, the discharge pressure of the cooling water from the electric double pump 57 is made higher than that from the water pump 12, so that the flow rate in the third cooling water path is made larger than in other cooling water systems.

In this embodiment, the refrigerant evaporator is placed upstream of the heat exchanger (heater core), but the refrigerant evaporator does not need to be installed, and instead of the refrigerant evaporator, when energized, the cooling water is cooled. Other cooling means such as elements may also be used.

[Brief explanation of the drawing]

1 to 12 show a first embodiment of an air conditioner for an automobile according to the present invention. Figure 1 is a schematic diagram showing heat storage operation of an automotive air conditioning system;
Fig. 2 is a perspective view showing a three-way valve of an automobile air conditioning system, Fig. 3 is a sectional view showing a three-way valve of an automobile air conditioning system, and Fig. 4 is a sectional view showing a three-way valve of an automobile air conditioning system.
The figure is a cross-sectional view showing the outer container of the three-way valve of the automotive air conditioning system II, Figure 5 is a partial partial view of the three-way valve of the automotive air conditioning system, and Figure 6 is a partial cross-sectional view of the automotive air conditioning system. It is a lower sectional view showing an inner container of a three-way valve. Fig. 7 is a perspective view showing a four-way valve of an automobile air conditioning system, Fig. 8 is a sectional view showing a four-way valve of an automobile air conditioning system, and Fig. 9
Figure 10 is a cross-sectional view of the outer container of the four-way valve of the automotive air-conditioning system, Figure 10 is an upper sectional view of the inner container of the four-way valve of the automotive air-conditioning system, and Figure 11 is the inside of the four-way valve of the automotive air-conditioning system. FIG. 12, which is a sectional view of the lower part of the container, is an operation flowchart of the control circuit of the automotive air conditioning system. 13 to 16 show a second embodiment of the automotive air conditioner of the present invention. FIG. 13 is a schematic diagram showing an automotive air conditioning system, FIG. 14 is a sectional view showing an outer container of a three-way valve of an automotive air conditioning system, and FIG. 15 is a sectional view showing an inner container of a three-way valve of an automotive air conditioning system. , FIG. 16 is a sectional view showing the inner container of the three-way valve of the automotive air conditioning system. 17 to 19 show a third embodiment of the automotive air conditioner of the present invention. FIG. 17 is a schematic diagram showing the first cooling water path of the automotive air conditioning system, FIG. 18 is a schematic diagram showing the second cooling water path of the automotive air conditioning system, and FIG. 19 is a schematic diagram showing the second cooling water path of the automotive air conditioning system. FIG. 3 is a schematic diagram showing a cooling water path of No. 3; Figure 20 shows a conventional automobile heating system.
! It is a diagram. In the diagram

Claims (1)

[Scope of Claims] 1) (a) A water-cooled engine installed in a vehicle; (b) A ventilation duct for sending air toward a vehicle interior; (c) Air passing through the ventilation duct. a heat exchanger that exchanges heat with the cooling water of the engine; (d) a heat retention tank that retains the temperature of the cooling water that has flowed into the interior; (e) a heat exchanger that exchanges heat with the cooling water that has flowed from the engine; (f) a second cooling water path that circulates the cooling water that has flowed out from the engine to the heat retention tank; (h) a third cooling water path to be circulated to the exchanger; (h) provided at a branching portion of the first cooling water path, the second cooling water path, and the third cooling water path; An air conditioner for an automobile, comprising: a three-way valve or more of a multi-way valve that selectively switches between the cooling water path, the second cooling water path, and the third cooling water path.