JPH06328930A - Heating device for vehicle - Google Patents

Abstract

PURPOSE:To provide a heating device for a vehicle capable of efficiently using cooling water in a hot insulation container as well as eliminating trouble by manual operation by way of automatically controlling switching of immediate heating in a car room and immediate heating of an engine to each other. CONSTITUTION:A hot water circuit 5 has a hot water piping 28 to circulate cooling water in a heater core 26 from a cooling water circuit 27 of an engine 17 and a by-pass piping 29 to flow cooling water back to the engine 17 by way of by-passing the heater core 26, and on the upstream of the heater core 26 of the hot water piping 28 and on the by-pass piping 29, electromagnetic switch valves 33, 34 are respectively provided. These electromagnetic switch valves 33, 34 are controlled by an air conditioner control device 6 in accordance with target spit temperature calculated on the basis of a heat load of a vehicle.

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 capable of performing quick heating of a vehicle compartment and quick heating of a water-cooled engine by utilizing high temperature cooling water kept warm in a heat insulating container.

[0002]

2. Description of the Related Art Conventionally, a warm water container is provided in a hot water circuit for circulating the cooling water of a water-cooled engine, and when the temperature of the cooling water is low immediately after the engine is started, the high temperature cooling water kept in the warm water container is used as a heater core. Alternatively, a technique has been proposed in which quick heating of the interior of the vehicle or quick heating of the engine is performed by supplying the air to the engine (see Japanese Patent Application Laid-Open No. 2-120119).

[0003]

However, in the above-mentioned prior art, a heating switch for instructing immediate heating of the passenger compartment and an engine warmer switch for instructing immediate heating of the engine are provided, and each of these switches is set by the occupant. Immediate heating of the passenger compartment or engine is performed by manual operation. For this reason, there has been a problem that the manual operation is troublesome and an erroneous operation is likely to occur, and as a result, the hot water (cooling water) in the heat retaining container cannot be effectively utilized. The present invention has been made based on the above circumstances, and an object thereof is to automatically control switching between immediate heating of a vehicle compartment and immediate heating of an engine, thereby eliminating the inconvenience caused by a manual operation and maintaining a heat insulating container. The purpose of the present invention is to provide a vehicle heating system that can effectively utilize the cooling water inside.

[0004]

According to a first aspect of the present invention, there is provided a hot water heat exchanger for exchanging heat between cooling water of a water cooled engine and air blown into a passenger compartment, and the water cooled engine. A heat retaining container that stores the guided cooling water and keeps it warm,
A first cooling water path for guiding the cooling water flowing out of the heat retaining container to the water cooling engine via the hot water heat exchanger,
And a hot water circuit that constitutes a second cooling water path that guides the cooling water flowing out of the warm water container to the water cooled engine by bypassing the hot water heat exchanger; Cooling water path switching means for switching a cooling water path through which outflowing cooling water flows, detection means capable of detecting at least one of the heat load of the vehicle and the temperature of the cooling water flowing out of the water-cooled engine, and the detection means. Based on the detection value of, the cooling water supply determining means for determining whether the cooling water in the heat retaining container needs to be supplied to the hot water heat exchanger, and the cooling water supply determining means for the heat retaining container. When it is determined that the cooling water of the above is required to be supplied to the hot water heat exchanger, the cooling water flowing out from the heat retaining container flows at least through the first cooling water path. If it is determined that it is not necessary to supply the cooling water in the heat retaining container to the hot water heat exchanger by the cooling water supply determining means, the cooling water that has flowed out from the heat retaining container is controlled. The technical means including the control means for controlling the cooling water path switching means so as to flow through the second cooling water path is adopted.

According to a second aspect of the present invention, there is provided an air blowing means for blowing air into the vehicle compartment, and an air blowing path extending from the air blowing means to the vehicle interior to provide cooling water for the water-cooled engine and the air blow. A hot water heat exchanger for exchanging heat with the air blown by means, a heat retaining container for storing and retaining cooling water led from the water cooling engine, and cooling water flowing out from the heat retaining container for the hot water. Hot water circuit that leads to the water-cooled engine via a hot water heat exchanger, flow rate adjusting means for adjusting the flow rate of cooling water supplied to the hot water heat exchanger,
Detecting means capable of detecting at least one of the heat load of the vehicle and the temperature of the cooling water flowing out from the water-cooled engine, and the cooling water supplied to the hot water heat exchanger based on the detection value of the detecting means. Cooling water flow rate setting means for setting the flow rate, and controlling the flow rate adjusting means based on the cooling water flow rate set by the cooling water flow rate setting means, and the cooling water flow rate set by the cooling water flow rate determining means When the amount of water is equal to or more than the preset amount of water, a technical means including a control means for controlling the air blowing means so as to stop the air blowing to the hot water heat exchanger is adopted.

[0006]

According to the first aspect of the present invention, the vehicle heating system determines whether or not the cooling water in the heat retaining container needs to be supplied to the hot water heat exchanger based on the heat load or the cooling water temperature of the vehicle. A cooling water supply determining means is provided. When it is determined by the cooling water supply determination means that the cooling water in the heat retaining container needs to be supplied to the hot water heat exchanger, the cooling water flowing out of the heat retaining container flows at least through the first cooling water passage. The cooling water path switching means is controlled as described above (thus, it is possible to flow through both the first cooling water path and the second cooling water path). As a result, the high-temperature cooling water stored in the heat-insulating container is supplied to the hot water heat exchanger to heat the air blown into the vehicle interior, thereby performing immediate heating of the vehicle interior. When the cooling water supply determining means determines that it is not necessary to supply the cooling water in the heat retaining container to the hot water heat exchanger, the cooling water flowing out of the heat retaining container flows through the second cooling water passage. Thus, the cooling water path switching means is controlled. As a result, the high-temperature cooling water stored in the heat-insulating container bypasses the hot-water heat exchanger and is supplied to the water-cooled engine, so that the water-cooled engine is immediately heated.

A vehicle heating system according to a second aspect of the present invention comprises a cooling water flow rate setting means for setting a cooling water flow rate to be supplied to the hot water heat exchanger based on the heat load or the cooling water temperature of the vehicle.
Then, based on the cooling water flow rate set by the cooling water flow rate setting means, the flow rate adjusting means for adjusting the cooling water flow rate supplied to the hot water heat exchanger is controlled. Here, when the cooling water flow rate set by the cooling water flow rate setting means is equal to or more than the preset set water quantity (for example, the maximum water quantity), the ventilation to the hot water heat exchanger is stopped, so that The stored high-temperature cooling water is supplied to the water-cooled engine without being heat-exchanged by the hot-water heat exchanger (or with a small heat exchange amount). As a result, quick heating of the water-cooled engine is performed. If the cooling water flow rate set by the cooling water flow rate setting means is less than the set water quantity, it is heated by heat exchange with the high-temperature cooling water supplied from the heat insulation container by blowing air to the hot water heat exchanger. Air is blown into the passenger compartment,
Immediate heating of the passenger compartment is performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a vehicle air conditioner to which the vehicle heating system of the present invention is applied will be described with reference to FIGS. FIG. 1 is a hot water circuit diagram constituting a heating means, and FIG. 2 is an overall schematic view of a vehicle air conditioner. The vehicle air conditioner 1 of the present embodiment (hereinafter referred to as the air conditioner 1) is
As shown in FIG. 2, a duct 2 that guides blown air into the passenger compartment,
A blower 3 that is arranged at the upstream end of the duct 2 and sends air into the vehicle compartment through the duct 2, a refrigeration cycle 4 that constitutes cooling means, a hot water circuit 5 that constitutes heating means (see FIG. 1), and an air conditioner. A control device 6 is provided.

The blower 3 comprises a blower case 3a, a centrifugal fan 3b, and a blower motor 3c, and the rotation speed of the blower motor 3c is determined according to the voltage applied to the blower motor 3c (hereinafter referred to as blower voltage). The blower voltage is controlled based on a control signal from the air conditioner control device 6 via the motor drive circuit 7 (see FIG. 5). The blower case 3a is formed with an inside air introduction port 8 for introducing the vehicle interior air (inside air) and an outside air introduction port 9 for introducing the outside air (outside air) of the vehicle compartment, and the amount of air introduced from the inside air introduction port 8 An inside / outside air switching damper 10 is provided for adjusting the introduction ratio with the amount of air introduced from the outside air introduction port 9.

The downstream end of the duct 2 is the defroster duct 2
a, a face duct 2b, and a foot duct 2c, and the ends of the ducts 2a to 2c serve as a defroster blower outlet 11, a face blower outlet 12, and a foot blower outlet 13 that open into the vehicle interior. An outlet switching damper 14 that selectively opens and closes the defroster duct 2a and the face duct 2b according to the outlet mode is provided at the upstream openings of the defroster duct 2a and the face duct 2b, and the upstream side of the foot duct 2c. The opening is provided with an outlet switching damper 15 that opens and closes the foot duct 2c according to the outlet mode.

The refrigeration cycle 4 supplies a refrigerant compressor 18 driven by a vehicle running engine 17 via an electromagnetic clutch 16 and a high temperature and high pressure refrigerant compressed by the refrigerant compressor 18 to a cooling fan 19. A refrigerant condenser 20 that receives and condenses and liquefies, and a receiver 21 that temporarily stores the refrigerant guided from the refrigerant condenser 20 and flows only the liquid refrigerant.
And a decompression device 22 for decompressing and expanding the liquid refrigerant guided by the receiver 21, and a decompression device 2 disposed in the duct 2.
The low-temperature low-pressure refrigerant decompressed in 2 is composed of functional parts of a refrigerant evaporator 23 that evaporates by receiving air blown from a blower 3, and is connected in an annular shape by a refrigerant pipe 24. The electromagnetic clutch 16 is a clutch drive circuit 25.
ON / OFF control is performed based on a control signal (ON / OFF signal) output from the air conditioner control device 6 via (see FIG. 5).

As shown in FIG. 1, the hot water circuit 5 includes a heater core 26 for heating air by using the cooling water of the engine 17 as a heat source, and the heater core 26 has a cooling water circuit 27 for the engine.
Hot water pipe 28 for circulating more cooling water, heater core 26
A bypass pipe 29 for bypassing the cooling water, a warming container 30 connected to the hot water pipe 28 to keep the high temperature cooling water warm, and a circuit control valve 3 interposed in the hot water pipe 28.
1. Water temperature sensor 3 for detecting the temperature of cooling water in the hot water circuit 5
2. An electromagnetic opening / closing valve 33 for opening / closing the hot water pipe 28 upstream of the heater core 26 and an electromagnetic opening / closing valve 34 for opening / closing the bypass pipe 29 are provided. The heater core 26, as shown in FIG.
On the downstream side (leeward side) of the refrigerant evaporator 23, the bypass path 35 in which the air flowing in the duct 2 bypasses the heater core 26 and flows.
The air mix damper 3 provided in the duct 2 has a ratio of the amount of air passing through the bypass passage 35 to the amount of air passing through the heater core 26.
Adjusted by 6.

The cooling water circuit 27 is composed of an annular water passage 27a that connects a water jacket (not shown) of the engine 17 and the radiator 37 in an annular shape, and a bypass water passage 27b that bypasses the radiator 37. In the cooling water circuit 27,
A water pump 38 driven by the engine 17 is provided, and the cooling water flows through the cooling water circuit 27 by the operation of the water pump 38. In addition, the ring waterway 27
The radiator 3 is provided at the connection between the a and the bypass waterway 27b.
A thermostat 39 for controlling the flow rate of the cooling water to 7 is arranged. This thermostat 39 has an annular water channel 27a.
Side opening degree and the bypass water channel 27b side opening degree are relatively varied, and as the annular water channel 27a side opening degree increases (that is, the bypass water channel 27b side opening degree decreases), the radiator 37 is opened. The cooling water flow rate increases. The opening degree of the thermostat 39 (opening degree on the annular water channel 27a side)
Is fully closed when the engine outlet water temperature is TLo (for example, about 80 ° C.) or lower (thus, the opening degree on the annular water passage 27a side is fully opened), and thereafter, the opening degree increases as the temperature of the cooling water rises. It is fully opened when the water temperature is THi (for example, about 90 ° C) or higher.

The heat insulation container 30 can keep the cooling water stored therein for a long time. For example, the outside air temperature is 0.
When the temperature is 0 ° C., the cooling water having a water temperature of 85 ° C. has a heat retention performance capable of retaining the water temperature to 78 ° C. after 12 hours. An inflow pipe 40 for inflowing cooling water into the heat retaining container 30 and an outflow pipe 41 for outflowing the cooling water in the heat retaining container 30 are connected to the heat retaining container 30. The upstream end of the inflow pipe 40 is connected to the outflow port 42d (see FIG. 3) of the circuit control valve 31, and the downstream end opens toward the bottom of the heat insulating container 30. Outflow pipe 41
Has its upstream end opened toward the upper part in the heat insulation container 30,
The downstream end is connected to the inflow port 42c (see FIG. 3) of the circuit control valve 31.

As shown in FIG. 1, the circuit control valve 31 is arranged at a position upstream of the heater core 26 of the hot water circuit 5, and is set in each mode (purge mode, immediate effect heater mode, heat storage mode) set during the heating operation. The flow direction of the cooling water flowing through the hot water circuit 5 is switched according to the heating stop mode, and the flow rate of the cooling water supplied to the heater core 26 (hereinafter referred to as the cooling water amount) is adjusted. In addition,
In the purge mode, the temperature of the cooling water is lower than the set temperature (for example, 40 ° C.) when the engine 17 is started (naturally, the temperature of the cooling water in the hot water circuit 5 upstream of the heater core 26 is also low),
In addition, when the elapsed time from the operation of the air conditioner 1 is within a predetermined time (for example, 20 seconds), the high temperature cooling water stored in the heat insulating container 30 is quickly supplied to the heater core 26 or the engine 17. .

In the immediate effect heater mode, when the temperature of the cooling water is lower than the set temperature and the elapsed time from the input of the heating signal exceeds the predetermined time, the amount of cooling water supplied to the heater core 26 by the circuit control valve 31. Is a mode in which the outlet temperature of the heater core 26 is controlled to a predetermined temperature (for example, 40 ° C .: a temperature at which a comfortable feeling due to heating is obtained). The heat storage mode is a mode in which, when the temperature of the cooling water is equal to or higher than the set temperature, the cooling water guided from the cooling water circuit 27 is supplied to the heat retaining container 30 to store heat and is also supplied to the heater core 26 or the engine 17. The heating stop mode is a mode indicating when the cooling / heating mode is maximum cooling (Max Cool).

Here, the structure of the circuit control valve 31 will be described with reference to FIGS. 3 and 4. The circuit control valve 31 includes a case 42 and a rotor 43. The case 42 has a rotor 43.
Has a cylindrical shape in which a rotor chamber (not shown) for accommodating is formed. As shown in FIG. 3, the case 42 includes a first pipe 42 a connected to the engine 17 side of the hot water circuit 5 and a second pipe 4 connected to the heater core 26 side.
2b and the inflow port 4 to which the outflow pipe 41 is connected
2c are provided and are opened in the rotor chamber with the same inner diameter. The first pipe 42a and the second pipe 42b are
The inflow port 42c is provided to face the case 42 in the radial direction with the rotor chamber interposed therebetween, and the inflow port 42c is located at an intermediate position in the circumferential direction between the first pipe 42a and the second pipe 42b (with respect to the first pipe 42a and the second pipe 42b). 90 degrees). The first pipe 42a is provided with a branch outflow port 42d to which the inflow pipe 40 is connected.

The rotor 43 has a shaft 43 at the center thereof.
a, and is rotatably supported by the case 42 via the shaft 43a. As shown in FIG. 4, the rotor 43 has three openings 43 b, 4 on the side surface of the rotor 43.
A T-shaped water passage 43e having 3c and 43d and a flat minute flow rate control hole 43f communicating with the water passage 43e are provided. The water channel 43e includes the first pipe 42a,
It has the same inner diameter dimension as the second pipe 42b and the inflow port 42c, and selectively connects the first pipe 42a, the second pipe 42b, and the inflow port 42c according to the rotational position of the rotor 43. The minute flow rate control hole 43f is formed continuously with the water passage 43e extending in the radial direction, and has a fan shape in which the area gradually increases from the central portion of the rotor 43 toward the outside. The rotor 43 is connected to the servomotor 45 via a link mechanism 44 connected to the shaft 43a, and the rotational position of the rotor 43 is determined according to the rotation angle of the servomotor 45. The servomotor 45 causes the rotor 43 to operate based on a control signal output from the air conditioner control device 6.
To drive.

The water temperature sensor 32 is provided in the first pipe 42a upstream of the connection portion of the outflow port 42d, and detects the temperature of the cooling water (water temperature Tw) flowing out of the engine 17 and flowing through the first pipe 42a. The electromagnetic on-off valve 33 and the electromagnetic on-off valve 34 switch the path of the cooling water flowing through the hot water circuit 5, and form the cooling water path switching means of the present invention.

As shown in FIG. 5, the air conditioner control device 6 has a microcomputer (not shown) built therein, and outputs an operation signal output from an air conditioner operation panel (not shown) and each sensor (described later). A motor drive circuit 7 for driving the respective servo motors 46, 47, 48 and the blower motor 3c for driving the respective dampers (the inside / outside air switching damper 10, the outlet switching dampers 14, 15, and the air mix damper 36) based on the detection signals. A clutch drive circuit 25 for driving the electromagnetic clutch 16, a servomotor 45 for driving the rotor 43, and electromagnetic on-off valves 33, 3.
The control signal is output to 4.

The air conditioner operation panel is arranged on an instrument panel (not shown) in the passenger compartment to set the passenger compartment temperature desired by the temperature setting switch 49 and the passenger compartment to the temperature set by the temperature setting switch 49. An automatic switch 50 for instructing the air conditioner control device 6 to automatically control each air conditioner so as to keep it, and a manual switch 51 for setting each air conditioning mode (suction port mode, air outlet mode, air blowing level of the blower 3, etc.). It is provided. Each of the above-mentioned sensors is an inside air sensor 52 that detects a vehicle interior temperature (inside air temperature Tr), an outside air sensor 53 that detects an outside temperature (outside air temperature Tam) of the vehicle interior, and a solar radiation sensor 5 that detects an insolation amount Ts.
4, the water temperature sensor 32 and the like.

The rotational position of the rotor 43 controlled by the air conditioner control device 6 is determined as follows according to the purge mode, the immediate effect heater mode, the heat storage mode, and the heating stop mode. It should be noted that the rotational position of the rotor 43 in the purge mode is set to 0 ° as the valve opening degree.
The clockwise direction of the rotor 43 shown in FIG.
Expressed as a direction. In the purge mode, the rotational position of the rotor 43 is controlled so that the opening 43b of the water channel 43e matches the inflow port 42c and the opening 43c of the water channel 43e matches the second pipe 42b (valve opening 0 °: (The state shown in FIG. 1). As a result, the inflow port 4 passes through the water channel 43e.
2c and the second pipe 42b communicate with each other, so that the cooling water flowing through the hot water circuit 5 flows from the engine 17 to the inflow pipe 40.
→ heat-retaining container 30 → outflow pipe 41 → water passage 43e extending from the opening 43b of the rotor 43 to the opening 43c → heater core 26 or bypass pipe 29 → water pump 38 → flows through a route circulating through the engine 17. The first cooling water path of the present invention is a path through which the cooling water flowing out of the heat insulation container 30 flows through the heater core 26 and circulates to the engine 17, and the second cooling water path flows out of the heat insulation container 30. This is a path through which the cooling water flows through the bypass pipe 29 and circulates to the engine 17.

In the immediate effect heater mode, the rotor 43 is rotated 5 ° counterclockwise in FIG. 1 from the rotational position in the purge mode.
The rotational position of the rotor 43 is controlled in the range of -10 ° (valve opening degree -5 ° to -10 °: the state shown in FIG. 6). As a result, the route of the cooling water flowing through the hot water circuit 5 is the same as that in the purge mode, but the opening ratio of the minute flow rate control hole 43f to the second pipe 42b is changed according to the rotation position of the rotor 43, so that the heater core is changed. The amount of cooling water supplied to 26 (for example, about 0.5 l / min) is adjusted. In this immediate effect heater mode, the heater core 26
The valve opening is determined in advance so that the outlet temperature of the heater core 26 reaches a predetermined temperature depending on the amount of cooling water supplied to the heater core 26.

In the heat storage mode, the rotor 43 is rotated 90 ° counterclockwise in FIG. 1 from the rotational position in the purge mode, that is, the openings 43b and 43c of the water passage 43e.
43d designates the first pipe 42a and the inflow port 42, respectively.
c, the rotational position of the rotor 43 is controlled so as to coincide with the second pipe 42b (valve opening −90 °: state shown in FIG. 7). As a result, the first pipe 42a and the inflow port 42
c and the second pipe 42b communicate with each other through the water passage 43e, whereby the cooling water flowing through the hot water circuit 5 is opened from the engine 17 → inflow pipe 40 → heat insulation container 30 → outflow pipe 41 → the opening 43c of the rotor 43. Water passage 43e to part d → heater core 26 or bypass pipe 29 → water pump 38 → a route for circulating engine 17 and engine 17 → opening 43b of rotor 43 to opening 43
It flows through a route that circulates the water passage 43e reaching the d → the heater core 26 or the bypass pipe 29 → the water pump 38 → the engine 17.

In the heating stop mode, 45 ° counterclockwise in FIG. 1 from the rotational position of the rotor 43 in the purge mode.
The rotated position, that is, the openings 43b, 43 of the water channel 43e
c and 43d are the first pipe 42a, the second pipe 42b,
The rotational position of the rotor 43 is controlled so that it does not coincide with any of the inflow ports 42c (valve opening −45 °: state shown in FIG. 8). As a result, the first pipe 42a, the second pipe 42b, and the inflow port 42c are connected to the water channel 43 in the rotor 43.
Since the hot water circuit 5 is cut off by the circuit control valve 31 without communicating with each other by e, even if the water pump 38 is operated, the cooling water does not circulate in the hot water circuit 5.

Next, the specific operation of this embodiment will be described.
FIG. 9 is a flowchart showing a processing procedure of the air conditioner control device 6. First, the set temperature signal Tset of the temperature setting switch 49 and the detection signals (water temperature Tw, inside air temperature Tr, outside air temperature am, insolation Ts) of the sensors (32, 52 to 54) are read (step 100). Next, the target outlet temperature TAO into the passenger compartment is calculated based on the following equation (step 1
10).

[Equation 1] TAO = Kset-Tset-Kr-Tr-Kam-
Tam-Ks.Ts + C where Kset is a temperature setting gain, Kr is an inside air temperature gain, Kam is an outside air temperature gain, Ks is an insolation gain, and C is a correction constant.

Next, the target outlet temperature TA calculated previously
Based on O, the inlet mode, the outlet mode, and the blowing mode are determined from the inside / outside air characteristics, the outlet characteristics, and the blower characteristics shown in FIG. 10 (step 120). Subsequently, the valve opening degree of the circuit control valve 31 and the cooling water path are shown in FIG.
The determination is made based on the hot water circuit control flowchart shown in 1 (step 130). The hot water circuit control flowchart will be described later. Then, it is determined whether the control mode of the air conditioner 1 is the automatic mode (step 14
0). If the result of this determination is YES (auto mode),
When the determination result is NO (manual mode), each mode selected in step 120 is set to the manual mode (step 150) determined by the occupant.

Then, each mode is controlled in accordance with each mode determined in the previous step 120 (in the auto mode) or each mode selected by the occupant (in the manual mode) (step 160). Then, the rotor 43 of the circuit control valve 31 is obtained so that the valve opening degree and the cooling water path of the circuit control valve 31 determined in step 130 can be obtained.
And the solenoid on-off valves 33 and 34 are controlled (step 17
0).

Next, the above-mentioned hot water circuit control (step 13
The operation relating to 0) will be described based on the hot water circuit control flowchart shown in FIG. First, the target outlet temperature TAO calculated in step 110 is set to a predetermined lower limit outlet temperature TA.
O1 and upper outlet temperature TAO2 (TAO2> TAO1
) To determine the cooling / heating mode (step 20)
0. Cooling water supply determining means of the present invention). This step 20
The processing of 0 automatically determines whether the immediate heating of the vehicle compartment or the immediate heating of the engine is performed. When the target outlet temperature TAO is lower than the lower limit outlet temperature TAO1, maximum cooling is performed. In addition, the maximum cooling is a case where the air supplied to the vehicle interior does not require heat exchange in the heater core 26.
Therefore, the determination result of step 200 is TAO <TAO1
At this time, the electromagnetic opening / closing valve 33 is closed and the electromagnetic opening / closing valve 34 is opened to perform quick heating of the engine 17 (step 210, control means of the present invention). As a result, the high-temperature cooling water stored in the heat retaining container 30 bypasses the heater core 26 and is supplied to the engine 17.

Subsequently, it is judged whether or not the detected value Tw of the water temperature sensor 32 is smaller than the set temperature Tw '(for example, 40 ° C.) (step 220). If the result of this judgment is YES (Tw <Tw'), Then, it is judged whether or not the elapsed time t from the operation of the air conditioner 1 is a predetermined time t1 (for example, 30 to 40 seconds) or more (step 230). If the determination result is NO (t <t1), the valve opening degree of the circuit control valve 31 is controlled to 0 ° to set the purge mode (step 240). As a result, the high-temperature cooling water stored in the heat retaining container 30 is quickly supplied to the engine 17, so that the engine 17 is immediately heated and the startability of the engine 17 can be improved. When the determination result of step 220 is NO (Tw ≧ Tw ′) and when the determination result of step 230 is YES (t ≧ t1)
Controls the valve opening of the circuit control valve 31 to -90 ° and sets the heat storage mode (step 250). This allows
While performing the normal engine cooling operation, the high-temperature cooling water is also introduced to the heat retaining container 30 to store heat.

On the other hand, the determination result of the above step 200 is T
When AO1≤TAO≤TAO2, the air-conditioning load is relatively small and some cooling or heating is required.
Therefore, in this case (TAO1 ≤ TAO ≤ TAO2),
Both the electromagnetic on-off valve 33 and the electromagnetic on-off valve 34 are opened (step 260, control means of the present invention). Further, when the determination result of step 200 is TAO> TAO2, the heating load is large, and immediate heating of the passenger compartment is required. Therefore, in this case (TAO> TAO2), in order to supply the cooling water to the heater core 26, the electromagnetic opening / closing valve 33 is opened and the electromagnetic opening / closing valve 34 is closed (step 270.
Control means of the present invention).

Steps 260 and 270 described above
After performing each of the processes, it is determined whether the detected value Tw of the water temperature sensor 32 is smaller than the set temperature Tw ′ (for example, 40 ° C.) (step 280). Here, when the detected value Tw of the water temperature sensor 32 is lower than the set temperature Tw ', the required heating effect cannot be obtained with the current cooling water temperature Tw, so either the purge mode or the immediate effect heater mode is set. It Therefore, the determination result of step 280 is YES.
In the case of (Tw <Tw '), it is determined whether the elapsed time t from the operation of the air conditioner 1 is a predetermined time t2 (for example, 20 to 30 seconds) or more as a criterion for the purge mode and the immediate effect heater mode. (Step 290). If the determination result is NO (t <t2), the valve opening degree of the circuit control valve 31 is controlled to 0 ° to set the purge mode (step 300), and the determination result of step 290 is YES. In the case (t ≧ t2), the valve opening degree of the circuit control valve 31 is controlled to −5 ° and the immediate effect heater mode is set (step 31).
0). Further, when the determination result of the above step 280 is NO (Tw ≧ Tw ′), it is possible to obtain the required heating effect at the current cooling water temperature Tw, so the circuit control valve 3
The valve opening of No. 1 is controlled to -90 ° to set the heat storage mode (step 320).

As a result, if the result of the determination in step 200 is TAO1 ≤ TAO ≤ TAO2 (when quick heating of the vehicle interior and quick heating of the engine 17 are to be performed), the purge mode is set and the heat insulating container 30 is set. The stored high-temperature cooling water quickly becomes the engine 17 and the heater core 2.
6 is supplied to 6 to prepare for immediate heating, and a predetermined time t2
After the lapse of time, the quick effect heater mode is set, and the quick effect heating of the vehicle interior and the quick heating of the engine 17 are performed. In addition, when the heat storage mode is set, it is not necessary to perform quick heating, so that high-temperature cooling water is guided to the heat retaining container 30 to perform heat storage while performing normal heating operation.

On the other hand, the determination result of step 200 is TAO.
> If TAO2 (for immediate heating of the passenger compartment),
By setting the purge mode, the high-temperature cooling water stored in the heat retaining container 30 is quickly supplied to the heater core 26 to prepare for immediate heating, and after a predetermined time t2 has elapsed, the immediate heater mode is set. As a result, immediate heating of the passenger compartment is performed. Further, when the heat storage mode is set, heat is stored in the heat insulating container 30 while performing the normal heating operation. Normally, when heating of the vehicle interior is required, when the cooling water temperature Tw is low, the delay control of the blower 3 (blower off when Tw <Tw ′) is performed, but when the immediate heating of the present embodiment is performed The delay control shall be canceled.

As described above, the high-temperature cooling water stored in the heat retaining container 30 is supplied to the heater core 2 in accordance with the valve opening control of the circuit control valve 31 and the opening / closing control of the electromagnetic opening / closing valves 33 and 34.
6 and engine 17 can be selectively supplied. That is, when it is not necessary to heat the interior of the vehicle in the summer, the high temperature cooling water in the heat insulation container 30 is used for heating the engine 17, and when a relatively large heating capacity is not required in spring, autumn, etc. The high-temperature cooling water in the container 30 can be used for both heating the vehicle interior and heating the engine 17, and can be used for immediate heating of the vehicle interior when a large heating capacity is required in winter or the like. As a result, the cooling water (warm water) in the heat retaining container 30 can be effectively used throughout the year. Further, by automating the hot water circuit control (the valve opening control of the circuit control valve 31 and the opening / closing control of the electromagnetic on-off valves 33, 34), it is possible to eliminate a troublesome switch operation and to prevent a malfunction caused by a manual operation. Can be prevented.

[Modification] In the present embodiment, the bypass pipe 29 for allowing the cooling water flowing out of the heat insulation container 30 to bypass the heater core 26 and flow back to the engine 17 is provided. However, the bypass pipe 29 and the electromagnetic opening / closing valve are provided. Instead of providing 33 and 34, control may be performed so as to switch between immediate heating of the vehicle interior and immediate heating of the engine 17 based on the valve opening control of the circuit control valve 31. For example, when performing the immediate heating of the engine 17, the purge mode is set (cooling water flow rate setting means according to claim 2) and the operation of the blower 3 is stopped. As a result, when the cooling water passes through the heater core 26, the temperature drop due to heat exchange with the air is reduced, so that a large amount of the cooling water is supplied to the engine 17 at a high temperature, and the engine 17 is immediately heated. be able to. Further, in the case of performing immediate heating of the vehicle compartment, as in the case of the present embodiment, the immediate heater mode is set (cooling water flow rate setting means according to claim 2) and the blower 3 is operated. can do.

In this embodiment, the cooling water is circulated in the hot water circuit 5 by the water pump 38 provided in the cooling water circuit 27, but an auxiliary pump capable of adjusting the flow rate of the hot water is provided in the hot water circuit 5. Is also good. In this case, in the purge mode and the heat storage mode, the auxiliary pump is driven at high rotation to increase the circulation flow rate, and in the immediate effect heater mode, the auxiliary pump is driven at low rotation (or off) to reduce the circulation flow rate. In this embodiment, the rotatable movable circuit control valve 31 in which the rotor 43 rotates is shown, but the present invention is not limited to this, and it is sufficient if the flow rate can be adjusted. For example, the ON / OFF valve is duty ratio controlled. It is also possible to use a control valve that changes the flow rate by adjusting

[0038]

The vehicle heating apparatus of the present invention automatically controls the cooling water path switching means or the flow rate adjusting means so that the high-temperature cooling water stored in the heat-insulating container is immediately heated in the passenger compartment and the engine. It can be effectively used for immediate heating. Also, since it does not require manual operation,
It is possible to eliminate the conventional cumbersome switch operation and prevent malfunction caused by manual operation.

[Brief description of drawings]

FIG. 1 is a hot water circuit diagram according to the present embodiment.

FIG. 2 is an overall schematic diagram of a vehicle air conditioner.

FIG. 3 is a sectional view of a circuit control valve.

FIG. 4 is a rotor perspective view of a circuit control valve.

FIG. 5 is a block diagram related to control of the present embodiment.

FIG. 6 is an operation explanatory view of the present embodiment (immediate effect heater mode).

FIG. 7 is an operation explanatory view of the present embodiment (heat storage mode).

FIG. 8 is an operation explanatory view of the present embodiment (heating stop mode).

FIG. 9 is a flowchart showing a processing procedure of the air conditioner control device.

FIG. 10 is a characteristic diagram for determining an inside / outside air mode, an outlet mode, and a blowing level.

FIG. 11 is a flowchart showing a processing procedure of the air conditioner control device according to the hot water circuit control of the present embodiment.

[Explanation of symbols]

1 Vehicle Air Conditioning Device (Vehicle Heating Device) 3 Blower (Blower Means) 5 Hot Water Circuit 6 Air Conditioner Control Device (Cooling Water Supply Determining Means, Control Means) 17 Running Engine (Engine) 26 Heater Core (Hot Water Heat Exchanger) ) 30 heat insulation container 31 circuit control valve (flow rate adjusting means) 32 water temperature sensor (detection means) 33 electromagnetic opening / closing valve (cooling water path switching means) 34 electromagnetic opening / closing valve (cooling water path switching means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sugimitsu 1-1, Showa-cho, Kariya city, Aichi prefecture Nihon Denso Co., Ltd.

Claims (2)

[Claims] 1. A hot-water heat exchanger for exchanging heat between cooling water of a water-cooled engine and air blown into a vehicle compartment; and b) storing cooling water led from the water-cooled engine. A warming container for keeping warm; c) a first cooling water path for guiding cooling water flowing out from this warming container to the water-cooled engine via the hot water heat exchanger, and cooling water flowing out of the warming container. A hot water circuit that constitutes a second cooling water path that bypasses the hot water heat exchanger and leads to the water-cooled engine; and d) a cooling water path that is provided in this hot water circuit and through which cooling water that flows out from the heat retaining container flows. And a cooling water path switching means for switching between the following: e) a detection means capable of detecting at least one of the heat load of the vehicle and the temperature of the cooling water flowing out from the water-cooled engine; and f) a detection value based on the detection value of this detection means. The heat retention Cooling water supply determining means for determining whether or not it is necessary to supply the cooling water in the vessel to the hot water heat exchanger; and g) the cooling water in the heat retaining container is determined by the cooling water supply determining means. When it is determined that the cooling water has to be supplied to the heat exchanger, the cooling water path switching means is controlled so that the cooling water flowing out of the heat retaining container flows at least through the first cooling water path, and the cooling is performed. When it is determined by the water supply determination means that the cooling water in the heat retaining container does not need to be supplied to the hot water heat exchanger, the cooling water flowing out of the heat retaining container flows through the second cooling water path. And a control means for controlling the cooling water path switching means. 2. A) air blowing means for blowing air toward the passenger compartment; and b) a cooling water of a water-cooled engine and the air blowing means which are arranged in a ventilation path from the air blowing means to the passenger compartment. A hot water type heat exchanger for exchanging heat with air; c) a heat retaining container for storing and retaining the cooling water guided from the water-cooled engine; and d) cooling water flowing out of the heat retaining container for the hot water type. A hot water circuit leading to the water-cooled engine via a heat exchanger; e) a flow rate adjusting means for adjusting the flow rate of cooling water supplied to the hot water heat exchanger; and f) a heat load of the vehicle or the water-cooled type. Detection means capable of detecting at least one of the temperatures of the cooling water flowing out from the engine; and g) cooling water for setting the flow rate of the cooling water supplied to the hot water heat exchanger based on the detection value of the detection means. Flow rate setting means, h) While controlling the flow rate adjusting means based on the cooling water flow rate set by the cooling water flow rate setting means, if the cooling water flow rate set by the cooling water flow rate setting means is equal to or more than the preset water quantity, A heating device for a vehicle, comprising: a control unit that controls the air blowing unit so as to stop the air blowing to the hot water heat exchanger.