JPH10100650A - Vehicular heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform excellent and immediately effective heating according to the sense of heat of an occupant by controlling an air blowing quantity of an air blowing fan according to heating capacity in a heater core in a vehicular heating system to perform air conditioning by using cooling water in a heat reserving tank. SOLUTION: When an air conditioning switch 119 is turned on, a control device 113 reads in detecting values of an outside air temperature sensor 114, an inside air temperature sensor 115 and a water temperature sensor 117 and a preset temperature of a temperature setting unit 116. When judged that an outside air temperature is lower than, for example, 10 deg.C, whether or not a prescribed time passes after an ignition switch is turned on is judged. When the prescribed time passes, a water temperature is read in again, and heating capacity in a heater core 12 is detected. Next, when heating capacity in this heater core 12, that is, a detecting temperature of the water temperature sensor 117 is, for example, 25 deg.C or less, starting of an air blower 13 is checked, and when the detecting temperature becomes 25 deg.C or more, an air blowing quantity of the air blower 13 is controlled so as to be increased according to a rise in the detecting temperature, and immediately effective heating control according to the sense of heat of an occupant is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle heating system, and more particularly, to storing high-temperature engine cooling water in a heat retaining tank, and supplying the high-temperature engine cooling water when the vehicle is started in winter. It relates to what is used as immediate heating.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. HEI 2-120120 discloses a technique in which engine cooling water is stored in a heat retaining tank and used as immediate heating in a vehicle interior in winter or the like. Then, when the occupant switches to the immediate effect heating operation mode, the hot water stored in the heat retaining tank flows to the heater core.

[0003]

However, according to the above-mentioned publication, when an immediate heating operation is actually performed,
Nothing is said about the automatic control method of the blowing capacity of the blower fan. As a result of the study by the present inventors, it has been found that switching to the immediate effect heating operation and simultaneously operating the blower fan have the following problems.
In other words, it takes some time before the hot water stored in the heat retaining tank is switched to the immediate heating operation and flows into the heater core. Therefore, when switching to the immediate heating operation and operating the blower fan at the same time, At the beginning of the operation, the blast air is not sufficiently heated by the heater core, and there is a problem that the occupant cannot obtain a feeling of heating.

[0004] That is, in a heating device for a vehicle in which air conditioning is performed using cooling water in a heat retaining tank, the heating capacity of the heater core has not been taken into consideration, and the control of the blower fan using the cooling water in the heat retaining tank has not been considered. The method was not established. In view of the above, the present invention is to control a blower fan according to the heating capacity of a heater core in a vehicle heating device that performs air conditioning using cooling water in a heat retaining tank.

[0005]

The present invention employs the following technical means in order to achieve the first object. According to the first aspect of the present invention, the blower (1) blows air toward the heating heater core (12) and blows warm air heated by the heating heater core (12) into the vehicle interior.
3) and the cooling water circuit (1, 2) of the water-cooled engine (3)
Temperature detecting means (117) for detecting the temperature in the vicinity of the downstream side of the heating heater core (12), and the air flow rate of the blower (13) according to the temperature (t _out ) detected by the temperature detecting means (117) And a blower control means (113) for controlling

[0006] Thus, the temperature detecting means detects the temperature near the downstream side of the heating heater core, that is, the heating capacity of the heating heater core, and can control the blowing amount of the blower in accordance with the detected temperature. As a result, quick-effect heating can be favorably performed in accordance with the occupant's warmth. In particular, in the invention according to the second aspect, the air blowing control means (113) includes the temperature detecting means (11).
It is characterized in that control is performed such that the blower (13) increases the amount of air blow as the temperature (t _out ) detected by 7) increases.

[0007] With this, it is possible to increase the amount of the blown air while maintaining the temperature of the blown air blown into the passenger compartment at a temperature that can give the occupant a feeling of heating. Good immediate heating can be performed. Further, in the invention according to claim 3, when the temperature detecting means (117) has the temperature (t _out ) equal to or higher than the predetermined temperature, the blowing control means (113) activates the blower (13), and When the temperature (t _out ) is lower than the predetermined temperature, the blower (13) is stopped.

[0008] Thus, when performing the immediate heating using the hot water in the regenerator, it is possible to prevent the cool air from being blown into the vehicle interior at the beginning of the immediate heating. In addition, in particular, in the invention according to claim 4, a pump (4) for circulating cooling water in the cooling water circuit (1, 2) is provided, and after the pump (4) starts and a predetermined time (T) elapses. Temperature detection means (11
The blower control means (113) activates the blower (13) according to the temperature ( _tout ) detected by 7).

Thus, the time difference between when the pump operates and the hot water in the regenerator flows into the heating heater core and the detection error of the temperature detecting means due to the response delay of the temperature detecting time are reduced, and the temperature is detected accurately. The temperature can be detected by the means. In the invention according to claim 5, a face ventilation passage (105) is provided downstream of the heating heater core (12) and blows air heated by the heating heater core toward the upper body of an occupant. Opening / closing means (108) for opening / closing the face ventilation passage (105)
A defroster air passage (104) provided downstream of the heating heater core (12) and for blowing air heated by the heating heater core toward the inner surface of the vehicle window glass.
A defroster opening / closing means (107) for opening and closing the defroster air passage (104); and a heating / cooling heater core (12) provided downstream of the heating heater core (12). Foot ventilation passage (106) for blowing air, foot opening / closing means (109) for opening and closing the foot ventilation passage, and face opening / closing means (108)
And defroster opening and closing means (107) and foot opening and closing means (1
09), and a defroster blowout mode in which air is blown only to the defroster airflow passage (104) as a blowout mode, a face blowout mode in which air is blown only in the face airflow passage (105), and at least a foot airflow passage. (106) has a blowing mode control means (113) for switching between a foot blowing mode for blowing air, and the blowing mode control means (113) includes a temperature detecting means (11).
As the temperature (t _out ) detected by 7) increases, the blowing mode is switched in the order of the defroster blowing mode, the face mode, and the foot mode.

As a result, when the temperature of the engine cooling water is low, the occupant cannot be given a feeling of heating so much.
The blowout mode can be set as a defroster blowout mode to prevent fogging of the vehicle window glass. When the temperature of the engine cooling water is a temperature that can give the occupant a feeling of heating, and the temperature of the conditioned air blown into the passenger compartment is not so high, the blowing mode is changed to the face blowing mode to improve the occupant's feeling of heating. Then, when the temperature of the conditioned air blown into the vehicle interior is high, the blowing mode can be set to the foot mode to perform heating in accordance with the warmth of the occupant.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 shows a cooling circuit 1 of a water-cooled engine.
(A circuit surrounded by a dashed line) and the vehicle air conditioner 100
(A circuit surrounded by a two-dot chain line). Reference numeral 3 denotes a vehicle water-cooled engine, and reference numeral 4 denotes a water pump that circulates hot water (cooling water) through the water-cooled engine 3. Part of the hot water that has taken the heat of the water-cooled engine 3 flows into the above-described cooling circuit 1 of the water-cooled engine, and the other hot water flows into the hot water circuit 2 of the vehicle air conditioner 100.

Reference numeral 5 denotes a radiator which serves as a cooling means of hot water (engine cooling water) of the water-cooled engine 3 in the cooling circuit 1 of the water-cooled engine. The cooling circuit 1 is provided with a bypass circuit 7 that bypasses the hot water circuit 6 flowing through the radiator 5, and switching between these two hot water circuits is controlled by a thermostat 8. Incidentally, switching between the two hot water circuits is usually performed when the hot water temperature is 80 ° C.
In the above case, it is controlled to flow to the radiator 5,
When the temperature is lower than 80 ° C., the flow is controlled so as to flow to the bypass circuit 7.

In the hot water circuit 2 of the vehicle air conditioner 100, a heat retaining tank 9 for keeping hot water is provided downstream of the hot water of the water-cooled engine 3, and a bypass circuit 10 for bypassing the hot tank 9 is provided. ing. Also,
The heat retaining tank 9 has a double adiabatic structure, and stores high-temperature engine cooling water that has taken heat from the engine 3.

A three-way valve portion 11 for switching between an inflow circuit 10a (inflow passage) flowing into the heat retention tank portion 9 and a bypass circuit 10 is provided at a branch point of the two hot water circuits. The three-way valve portion 11 has a switching function of the hot water circuit and also has a flow rate adjusting mechanism. In the present embodiment, the heat retaining tank 9 and the three-way valve 11 are assembled integrally. Hereinafter, a combination of the two is referred to as a heat retaining tank 40. Also, 10b is a heat retaining tank section 9
Is an outflow circuit (outflow channel) through which hot water flows out.

By the way, when the vehicle air conditioner 100 according to the present embodiment is mounted on a vehicle, the heat retaining tank 40
Installed inside the engine room. And
On the downstream side of the hot water of the heat retaining tank 40, a heater core 12 serving as a heating means for the vehicle interior is provided, and the warm air heated by the heater core 12 enters the vehicle interior via a ventilation duct 60 of the vehicle air conditioner 100. The air is blown by the blower 13. The downstream side of the heater core 12 is connected to the water pump 4 to form the hot water circuit 2 of the vehicle air conditioner 100.

Here, the configuration of the vehicle air conditioner 100 will be briefly described. In the vehicle air conditioner 100, an air conditioning function component is provided in the ventilation duct 60 described above. On the upstream side of the ventilation duct 60, the blower 13 for generating the blast air flowing toward the vehicle interior is installed in the ventilation duct 60. The blower 13 is configured to suck the inside air or the outside air selected by a well-known inside / outside air switching device (not shown). And this blower 13
Is driven by the electric motor 13a.

Further, in the ventilation duct 60, the blower 12
Downstream of the heater core 12 and the evaporator 1
01 is arranged. The evaporator 101 forms an evaporator of a refrigeration cycle device (not shown) mounted on a vehicle. Also, this refrigeration cycle device
A well-known compressor that compresses a refrigerant to a high temperature and a high pressure;
It has a condenser for condensing and liquefying a high-temperature and high-pressure refrigerant, an expander for decompressing and expanding the condensed and liquefied refrigerant, the evaporator 101 and the like. In the compressor, the driving force of the engine 3 is intermittently operated via an electromagnetic clutch (not shown).

In the ventilation duct 60, the heater core 1 is provided.
Since 2 is arranged in a part of the flow path in the ventilation duct 60, a bypass passage 102 is provided to allow the cool air that has passed through the evaporator 101 to bypass the heater core 12. And the air conditioner 1 for vehicles in this embodiment
At 00, the temperature of the conditioned air is adjusted by adjusting the ratio of the amount of air flowing through the bypass passage 102 and the amount of air flowing through the heater core 12 with the air mix door 103.

Further, downstream of the ventilation duct 60, a defroster air passage 104 for blowing conditioned air toward the inner surface of the window glass of the vehicle, and a face for blowing conditioned air toward the upper body of a passenger in the vehicle compartment. An air passage 105 for the foot and an air passage 106 for the foot for blowing the conditioned air toward the lower body of the occupant in the passenger compartment are provided. These air passages 104 to 106 are opened and closed by defroster doors 107, face doors 108, and foot doors 109, which are passage opening and closing means. In the present embodiment, the door 1
Reference numerals 07 to 109 denote servo motors 110 to 1 as driving means.
12 is driven.

As a result, the vehicle air conditioner 100 can switch between a face mode, a bi-level mode, a foot mode, a foot differential mode, and a defroster mode as a blowing mode. Here, the face mode is a blowing mode in which air is blown into the vehicle compartment only from the face air passage 105 among the air passages 104 to 106 described above. The bi-level mode refers to the air passage 10 described above.
4 to 106, a blowing mode in which air is blown into the vehicle interior from both the face air passage 105 and the foot air passage 107. The foot mode is a blowing mode in which most of the air volume blown into the vehicle interior is blown to the foot air passage 107 and a small amount of air is blown from the defroster air passage 104.

Further, in the foot differential mode, about half of the amount of air blown into the passenger compartment is reduced to about half of the air passage 107 for the foot.
And the other half is blown to the defroster air passage 104. The defroster mode is a blowing mode in which air is blown only from the defroster air passage 104 among the air passages 104 to 106 described above.

Then, such a vehicle air conditioner 100
In the air conditioner, the control device 113 automatically controls the air-conditioning control of the blowing mode, the temperature of the conditioned air, the amount of air blown by the blower 13, and the like. The control device 113 is a known device having a central processing unit (not shown), a ROM, a RAM, and the like. Then, the control device 113 temporarily stores signals from various sensors in the RAM, and based on these signals,
This is to execute an air conditioning program stored in the OM. The control device 113 is configured to be supplied with electric power when an ignition switch (not shown) of a vehicle is turned on.

As an input terminal of the control device 113, an outside air temperature sensor 11 for detecting a temperature outside the vehicle compartment (hereinafter, an outside air temperature) is used.
4. Inside temperature sensor 115 for detecting the temperature inside the vehicle (hereinafter, the inside temperature), temperature setting device 1 for setting the set temperature inside the vehicle
16. The water temperature sensor 117 for detecting the temperature of the engine coolant passing through the heater core 12 (hereinafter referred to as the water temperature). The vehicle air conditioner 100 is connected to the air temperature immediately after passing through the evaporator 101 or the temperature of the downstream ventilation surface of the evaporator 101. A post-evaporator sensor (hereinafter referred to as a post-evaporation sensor) 118 to be detected, and an air-conditioning switch 119 for automatically controlling a blowing amount (rotation speed) of the blower 13 and a blowing mode based on a detection value of the sensor are connected. . In the present embodiment, the water temperature sensor 117 includes a thermistor, which is a temperature-sensitive resistance element, and is attached to the outer surface of the cooling water pipe immediately after passing through the heater core 12 as shown in the figure.

On the other hand, as an output terminal of the control device 113, a motor 13a for driving the blower 13 and each door 1
Servo motors 110 to 112 for driving 07 to 109 are connected. The control of the vehicle air conditioner 100 by the control device 113 will be described later.

Next, regarding the three-way valve portion 11 of the heat retaining tank 40, reference numeral 42 denotes a hot water inlet for introducing hot water into the heat retaining tank 40, and reference numeral 43 denotes hot water stored in the heat retaining tank 40. Is the outlet for hot water flowing out. And
At the end of the valve housing 41 without the hot water outflow ports 42, 43, a housing cover 44 forming the inflow circuit 10a is provided.
Are attached to the valve housing 41 via O-rings 41a with bolts (not shown). The other end of the valve housing 41 is provided with a bypass circuit 10.
Is assembled to the valve housing 41 via an O-ring 41a with bolts (not shown).

At the substantially center of the valve housing 41, there is formed a hollow cylindrical communication chamber 46 which forms a hot water branching section with the inflow circuit 10a, the bypass circuit 10, and the like. On the inflow circuit 10a side in the center of the communication chamber 46, there is formed a valve seat 47 extending over the entire inner periphery of the communication chamber 46, and the valve port 4 formed by the valve seat 47 is formed.
An orifice valve 48 (valve element) made of resin is provided on the inflow circuit 10a side of 7a to adjust the flow rate of hot water flowing through the inflow circuit 10a.
Is arranged. An annular sealing material (for example, nitrile rubber) 4 is provided on the contact surface between the orifice valve 48 and the valve seat 47.
8a is adhered to the orifice valve 48.

In the center of the orifice valve 48,
An orifice 48b penetrating the orifice valve 48 and communicating with the inflow circuit 10a is provided. The diameter of the orifice 48b is about 4 in this embodiment.
mm) is larger than the diameter of the orifice hole on the valve seat 47 side (about 2 mm in this embodiment). The extension of the center line of the orifice 48b and the housing cover 44
A guide post 49 for guiding the sliding of the orifice valve 48 is provided at the intersection with the guide post 49. The guide post 49 is provided with a groove 49c as shown in FIG. The groove depth is such that the flow rate of the hot water flowing through the orifice 48a satisfies a predetermined flow rate with the guide column 49 inserted into the orifice 48b.

The inflow circuit 10a of the orifice valve 48
A groove 48c is provided in the outer edge on the side to improve the seating of the return spring 50 of the orifice valve 48. For the same reason, the portion 44a of the housing cover 44 where the end of the spring 50 is located is formed in a concave shape. In the communication chamber 46 on the side of the bypass circuit 10, a thermostat 51 (temperature-sensitive valve element) serving as a temperature-sensitive valve element of the bypass circuit is arranged. 52 is a thermostat 51
The metal casing has an opening at the side and both ends. Among these openings, a resin convex portion 52b is provided at the center of the opening 52a on the bypass circuit 10 side, and the convex portion 52b is hollow with its convex tip closed. It has become. The bypass circuit 10 in the communication chamber 46 is formed by the opening 52a and the opening on the side surface of the casing 52, and the opening and closing of the bypass circuit 10 is controlled by opening and closing the opening 52a. .

A wax box 53 serving as a temperature-sensitive operating member is disposed on the center axis of the casing 52 so as to be slidable in the axial direction of the communication chamber 46. Is provided with a flange portion 53a. The flange 53a is pressed against the opening 52a via a return spring 54, and the opening 52a is opened and closed by the wax box 5.
3 is controlled by sliding.

The wax box 53 is filled with a wax having a predetermined melting point (about 40 ° C. in this embodiment), and a shaft 55 that moves according to a change in the volume of the wax is slidable. It is stored in a wax box 53. One end of the shaft 55 is inserted inside the above-mentioned convex portion 52b, and the wax box 53 expands the inflow circuit 10a due to the volume expansion of the wax.
Move to the side.

On the inflow circuit 10a side of the casing 52,
A folded portion 52b is formed on the inside thereof, and the above-described spring 54 is disposed between the flange portion 53a and the folded portion 52c. By the way, the inflow circuit 10a communicates with the opening 25, and as shown in FIG. 2, an outflow pipe (not shown) for leading out hot water stored in the heat retaining tank 40 is formed integrally with the valve housing 41. Have been. The outflow pipe is formed to extend from the opening 25 toward the back side of the paper surface in FIG.

Next, the thermostat 51 of the three-way valve 11
, And then the operation of the hot water circuit 2 and the heat retaining tank 40 of the vehicle air conditioner shown in FIG. When the temperature of the hot water in the communication chamber 46 becomes high (40 ° C. or more in this embodiment), the wax in the wax box 53 expands, and accordingly, the wax box 53 is moved to the orifice valve 48.
Side, the opening 52a is opened, and the bypass circuit 10 starts to communicate. Then, when the wax box 53 is further moved, the wax box 53 starts to contact the central portion of the orifice valve 48, so that the orifice 48b is closed. Hereinafter, the hot water circuit flowing through the orifice 48b into the heat retaining tank 40 will be referred to as the orifice circuit 1
0b. Further, when the orifice valve 48 moves to the wax box 53, the orifice valve 48 starts to move. Therefore, the valve port 47a starts to open, and the inflow circuit 10a starts to communicate. The orifice circuit 10b is connected to the orifice 48b by the wax box 53, as is apparent from FIG.
Until is closed, they are communicated via the groove 49c.

Next, the operation of the insulated heating system for a vehicle will be described with reference to FIG. 1. Immediate heating mode The hot water temperature immediately after the engine starts is low (in this embodiment, 4
When the temperature is lower than 0 ° C.), since the low-temperature water flows in, the thermostat 51 does not operate as described above, so that the bypass circuit 10 is kept closed. Therefore, the flow rate of the low-temperature water is reduced by the orifice circuit 10b and flows into the heat retaining tank 40, and the same amount of the low-temperature water flowing into the heat retaining tank 40 (about 1 liter / mi in the present embodiment).
n), the high-temperature water stored in the heat retention tank flows into the heater core 12 to perform immediate heating. The reason why the flow rate is reduced by the orifice circuit 10b and allowed to flow into the heat retaining tank 40, and the same flow rate of the high temperature water is flowed into the heater core 12 for the following reason.

For example, if all the high-temperature water in the heat retaining tank 40 flows into the heater core 12 for one minute, high-temperature hot air blows out from the heater core 12 for one minute. The hot water whose temperature has dropped due to this will flow into the engine 3 during this time, and heat will be taken by the engine 3 which has become cold. As a result, the temperature of the hot water that has passed through the engine 3 drops significantly because the heat capacity of the engine 3 is large, so that even if the hot water flows into the heater core 12 again, it is difficult to give the occupant a sufficient feeling of heating.

Therefore, in this embodiment, the orifice circuit 1
By reducing the flow rate at 0b and gradually flowing the high-temperature water in the heat retaining tank 40 into the heater core 12, the occupant can be given a feeling of heating for a long time. 2. Hot water bypass mode Then, the temperature of the hot water rises (40 ° C. or more in this embodiment).
Then, since the thermostat 51 starts to operate, the bypass circuit 10 starts to open. And the orifice circuit 10
b is closed, the supply of hot water from the heat retention tank 40 to the heater core 12 is stopped, and the hot water whose temperature has risen from the water-cooled engine 3 flows directly into the heater core 12 through the bypass circuit 10.

3. Heat storage mode When the hot water temperature further rises, the orifice valve 4
8 moves and the inflow circuit 10a opens. Thereby, the hot water flows into both the bypass circuit 10 and the inflow circuit 10a, and supplies the hot water to both the inside of the heat retaining tank 40 and the heater core 12. Incidentally, the amount of hot water supplied at this time is about 6 liter / min in this embodiment.

Next, the control device 113, which is an essential part of the present invention, will be described.
Of the vehicle air conditioner 100 will be described. The vehicle air conditioner 100 according to the present embodiment automatically heats the vehicle interior using the hot water stored in the heat retaining tank 40. That is, in the embodiment of the present invention, a switch or the like for causing the hot water in the heat retaining tank 40 to flow into the heater core 12 is not particularly provided, and the occupant is automatically and immediately utilized by effectively utilizing the hot water in the heat retaining tank 40. It gives a feeling of heating to the interior of the vehicle and continues to heat the passenger compartment thereafter.

First, FIG. 3 is a flowchart showing the control contents of the control device 113. This flowchart is executed when the air conditioner switch 119 is turned on when the ignition switch is turned on. In this state, when the ignition switch is turned off and then the ignition switch is turned on again, the air conditioning switch 119 is kept on, and this flowchart is executed.

First, in step S201, as the reading of various information, the detection values of the outside air temperature sensor 114, the inside air temperature sensor 115, the water temperature sensor 117, and the set temperature of the temperature setting device 116 are read. In step S202,
It is determined whether the detection value Tam of the outside air temperature sensor 114 is lower than a predetermined value (10 ° C. in the present embodiment). That is, in this step S202, it is determined whether or not to perform the immediate effect heating control for immediately giving the occupant a feeling of heating. That is, when the outside temperature Tam is low, it is highly necessary to perform the immediate heating control, and when the outside temperature is high (for example, in summer).
If the immediate effect heating control is performed, the occupant will feel great discomfort.

Therefore, in the present embodiment, the immediate heating control is performed when the outside air temperature is lower than 10 ° C. based on the outside air temperature. When the outside air temperature is higher than 10 ° C., the process proceeds to step S203. Normal control is performed. Also,
Here, the normal control means calculating a target outlet temperature in the vehicle cabin based on the information read in step S201, and changing the outlet mode to the face mode and the bi-level as the target outlet temperature increases from a low state to a high state. Mode, foot mode, and foot differential mode.

The voltage applied to the motor 13a is controlled so that the air volume of the blower 13 increases as the target blowing temperature decreases, and the motor 13a increases as the target blowing temperature increases.
The applied voltage a is controlled. In the air mix door 103, the ratio of the amount of cold air to the amount of hot air is controlled based on the detection value of the water temperature sensor 117 and the target outlet temperature.

If it is determined in step S202 that the outside air temperature is lower than 10 ° C., the flow advances to step S204 to determine whether a predetermined time T has elapsed since the ignition switch was turned on. Hereinafter, this step S204
In the present embodiment, the function of the water temperature sensor 117 will be described.
The blower 13 is controlled in accordance with the detection value of the water temperature sensor 117. However, after the water pump 4 is operated, a slight time difference and a response delay of the water temperature sensor 117 occur until the hot water in the heat retaining tank 40 flows into the heater core 12. There is.

Therefore, in the present embodiment, in consideration of the time difference and the response delay, after the water pump 4 is operated, a predetermined time T (5 seconds in the present embodiment) elapses, and then the process proceeds to step S205 and the water temperature t again. _out is read. Thereby, the heating capability of the heater core 12 can be accurately detected. Further, in the present embodiment, since the water temperature sensor 117 is provided close to the downstream side of the cooling water of the heater core 12, the actual heating capability of the heater core 12 can be determined based on the detected value. This allows
If the amount of air blown by the blower 13 is controlled in accordance with the value detected by the water temperature sensor 117, immediate heating control can be performed in accordance with the warmth of the occupant.

Then, in step S205, a condition determination is made as to which temperature range the re-read water temperature t _out is in. This condition determination is based on the detected temperature t of the water temperature sensor 117.
_{As the out} becomes higher, the blowing amount of the blower 13 (applied voltage)
And the detected temperature t _out of the water temperature sensor 117 is 25 °.
If it does not exceed C, the blower 13 is not started (step S206). That is, the heat storage tank 40
This means that the hot water stored inside is almost completely cooled, so that immediate heating control cannot be performed. When the detected temperature t _out exceeds 25 ° C., the detected temperature t _{out
The outflow} of the blower 13 is increased with an increase in _out .

With this, the amount of air blown can be increased while maintaining the temperature of the air blown into the vehicle cabin at a temperature that can give the occupant a feeling of heating. Good immediate heating can be performed. Further, in this condition determination, the defroster mode or the face mode in which air is blown toward the upper body of the occupant becomes higher as the detected temperature t _out of the water temperature sensor 117 becomes higher, and the air is directed toward the lower body of the occupant when the detected temperature t _out becomes higher. Mode and the foot differential mode for blowing air. In other words, since the warmth of the occupant is more sensitive in the upper body than in the lower body, while the detected temperature t _out is low, even if air is blown to the occupant's feet, the occupant hardly has a feeling of heating. Blowing air toward the upper body gives the occupants a feeling of heating.

Then, t _out is higher than 25 ° C. and 35
When the temperature is lower than ° C, that is, in step S207, it is determined that the heating capacity of the heater core 12 is very small and the temperature of the hot air blown out of the heater core 12 is not so high. Therefore, when this warm air is blown, for example, to the feet or upper body of the occupant, the occupant hardly feels a feeling of heating. Therefore, the blowing amount of the blower 13 is set to Lo, and the defrosting mode is improved in the defroster mode.

On the other hand, when t _out is 35 ° C. or higher and lower than 50 °, the routine proceeds to step S208, where the blower 13
And the blowing mode is set to the face mode. That is, in step S204, the fact that t _out is equal to or higher than 30 ° C. and lower than 50 ° C. means that the temperature of the warm air that has passed through the heater core 12 is higher than that in step S207. If a blowing mode in which air is blown toward the lower body of the occupant, such as a foot mode or a foot differential mode, the occupant can be given a slight feeling of heating.

However, despite the increase in cost, one of the main reasons for providing the heat storage tank 40 is to immediately give the occupant a feeling of heating, and simply send warm air to the feet of the occupant. Then, it is difficult for the occupants to perceive the merit of the heating feeling with respect to the cost. Therefore, in the present embodiment, the blowing mode is set to the face mode in order to more quickly give the occupant a feeling of heating.

If it is determined in step S209 that t _out is higher than 50 ° C., the above-described step S
Normal control is performed in the same manner as 203. That is, the blowing amount and the outlet mode of the blower 13 are determined according to the target blowing temperature, and in this case, the foot mode or the foot differential mode is set. The embodiments of the present invention have been described above, but the present invention can be applied to the following modifications.

In the above embodiment, when the temperature detected by the water temperature sensor 117 is between 35 ° C. and 50 ° C., the face mode is set, but the foot mode or the foot differential mode may be set. Further, in the above-described embodiment, the amount of air blown by the blower 13 is varied stepwise at a certain boundary temperature such that the detected temperature t _out of the water temperature sensor 117 is 35 ° C. or 50 ° C., but as the detected temperature increases The air volume may be increased linearly.

In the above embodiment, the water temperature sensor 11
The blowout mode was switched at a certain boundary temperature such as a detected temperature t _out of 35 ° C. or 50 ° C., but the face temperature was changed according to the temperature rise such as a detected temperature of 40 ° C. to 55 ° C. The air flow rate between the air passage 105 for the foot and the air passage 106 for the foot may be controlled linearly so that the air flow ratio for the foot air passage 106 is larger.

In the above embodiment, the air conditioning switch 1
By turning on 19, the immediate heating control can be automatically performed. For example, when an immediate heating switch is provided in the vehicle compartment, and when the immediate heating switch is turned on,
The immediate heating control shown in steps S207 and S208 may be performed. When the immediate heating switch is not turned on and only the air conditioning switch 119 is turned on, the normal control is performed. At this time, if the immediate heating switch is turned on, the immediate heating control may be forcibly performed regardless of the outside air temperature.

In the above-described embodiment, the air-conditioning system for a vehicle is applied to an air-mix type in which cold air and hot air are mixed. However, by adjusting the flow rate of hot water in the heater core 12, for example, the temperature of the air-conditioned air is adjusted. May be a heat type that adjusts the temperature. In this case, for example, a flow rate control valve for controlling the flow rate is provided on the upstream side or the downstream side of the heater core 12, and when performing the immediate effect heating control, the hot water is always supplied to the heater core 12.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a detailed view of a main part of the three-way valve 11 in the embodiment.

FIG. 3 is a flowchart showing control contents of the vehicle air conditioner in the embodiment.

[Explanation of symbols]

1: cooling circuit, 2: hot water circuit, 3: water-cooled engine, 1
Reference numeral 2: heater core 13: blower, 40: regenerator, 104: air passage for defroster 105: air passage for face, 106: air passage for foot, 107: defroster door, 108: face door
109: foot door, 113: control device, 117: water temperature sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sugi Hikari 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside DENSO Corporation

Claims (5)

[Claims] An insulated tank (40) having an adiabatic structure for allowing engine cooling water to flow into and out of a cooling water circuit (1, 2) of a water-cooled engine (3).
And a heater core (12) for heating air using the engine cooling water as a heat source downstream of the heat retaining tank (40).
A vehicle heating device (10) configured to heat the vehicle interior by flowing engine cooling water stored in the heat retention tank (40) into the heating heater core (12).
0), a blower (13) for blowing air toward the heating heater core (12) to blow warm air heated by the heating heater core (12) into the vehicle interior; Temperature detecting means (117) for detecting a temperature near the downstream side of the heating heater core (12) in the water circuits (1, 2); and a temperature (t _out ) detected by the temperature detecting means (117).
And a blower control means (113) for controlling a blower amount of the blower (13) in accordance with the air conditioner. 2. The blower control means (113) controls the blower (13) such that the blower amount increases as the temperature (t _out ) detected by the temperature detector (117) increases. The vehicle heating device according to claim 1, wherein 3. The blower control means (113) activates the blower (13) when the temperature (t _out ) detected by the temperature detection means (117) is higher than a predetermined temperature, and activates the temperature (t). _out ) is lower than a predetermined temperature, the blower (13) is stopped.
Or the heating device for vehicles according to 2. 4. A pump (4) for circulating cooling water in the cooling water circuits (1, 2), wherein the air blowing control means (113) operates the pump (4) for a predetermined time ( The vehicle according to any one of claims 1 to 3, wherein the blower (13) is controlled in accordance with a temperature (t _out ) detected by the temperature detecting means (117) after the elapse of T). Heating system. 5. A face air passage (1) provided downstream of the heating heater core (12) and blowing air heated by the heating heater core toward an upper body of an occupant.
05), a face opening / closing means (108) for opening / closing the face ventilation passage (105), and provided downstream of the heating heater core (12), and facing the inner surface of the vehicle window glass by the heating heater core. A defroster air passage (104) for blowing heated air; a defroster opening / closing means (107) for opening and closing the defroster air passage (104); and a lower body of the occupant provided downstream of the heater core (12). Foot air passage (106) for blowing air heated by the heater core (12) toward
Foot opening / closing means (109) for opening / closing the foot air passage (106); opening / closing control of the face opening / closing means (108), the defroster opening / closing means (107), and the foot opening / closing means (109); As a blowing mode, a defroster blowing mode in which air is blown only to the defroster blowing passage (104), a face blowing mode in which air is blown only in the face blowing passage (105), and air is blown into at least the foot blowing passage (106). Blowing mode control means (113) for switching between a foot blowing mode for blowing air, and the blowing mode control means (113) includes a temperature (t _out ) detected by the temperature detecting means (117).
The heating device for a vehicle according to any one of claims 2 to 4, wherein the blow mode is switched in the order of the defroster blow mode, the face mode, and the foot mode as the air conditioner becomes higher.