JP2017013549A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular air conditioner that enables extension of idling stop time.SOLUTION: A vehicular air conditioner 1 includes: a cold storage cooling mechanism 3 having a cold storage agent to cool blowing air; a heating mechanism 5 for heating cold air that has passed through the cold storage cooling mechanism 3; a mixing door 7 that is disposed upstream of the heating mechanism 5 to control a ratio between cold air passing through the cold storage cooling mechanism 3 and bypassing the heating mechanism 5 and cold air flowing in the heating mechanism 5; an intake door 9 that is disposed upstream of the cold storage cooling mechanism 3 to control a ratio between outside air on the outer side of a cabin flowing to the cold storage cooling mechanism 3 and inside air on the inner side of the cabin; and control means 11 for controlling operations of the mixing door 7 and the intake door 9. When a vehicle is toward idling stop, the control means 11 causes the intake door 9 to be disposed on the side for making inside air flow in the cold storage cooling mechanism 3 and causes the mixing door 7 to be disposed on the side for making cold air that has passed through the cold storage cooling mechanism 3 bypass the heating mechanism 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle air conditioner applied to a vehicle.

  Conventionally, as a vehicle air conditioner, a compressor for controlling the discharge amount of refrigerant, an acceleration / deceleration detecting means for detecting acceleration / deceleration of an engine, an actuator for controlling the operation of a mix door, and an engine in an acceleration state There has been known one provided with control means for operating the mix door to the high temperature side and operating the mix door to the low temperature side when the engine is in a decelerating state (see, for example, Patent Document 1).

  In this vehicle air conditioner, the cooling performance varies depending on the increase / decrease of the refrigerant discharge amount of the compressor due to the increase / decrease of the engine rotation by controlling the operation of the mix door by the control means according to the acceleration / deceleration state of the vehicle. Is corrected to obtain a constant cooling performance.

Japanese Patent Laid-Open No. 1-4414

  By the way, in the vehicle air conditioner like the above-mentioned patent document 1, the blowout temperature blown out into the vehicle interior is adjusted by controlling the operation of the mix door according to the acceleration / deceleration state of the vehicle. The control takes into account when the vehicle is in a running state, and does not take into account the control when the vehicle is in an idle stop state.

  In a vehicle air conditioner mounted on a vehicle having an idle stop mechanism, a cold storage cooling mechanism having a cold storage agent that stores cold heat in a cooling mechanism that operates during normal traveling is applied, and the cold storage agent is used in the idle stop state of the vehicle. The blown air blown into the passenger compartment is cooled using the stored cold energy.

  In a vehicle air conditioner having such a cold storage cooling mechanism, it is desired to suppress an increase in blowing temperature in an idle stop state of the vehicle and extend an idle stop time.

  Therefore, an object of the present invention is to provide a vehicle air conditioner that can extend the idle stop time.

  The present invention includes a cool storage cooling mechanism that has a cool storage agent and cools blown air, a heating mechanism that heats cold air that has passed through the cool storage cooling mechanism, and an upstream side of the heating mechanism that passes through the cool storage cooling mechanism. A mix door that adjusts the ratio of the cold air that bypasses the heating mechanism and the cold air that flows through the heating mechanism; outside air outside the vehicle interior that flows to the cold storage cooling mechanism and that is disposed upstream of the cold storage cooling mechanism; A vehicle air conditioner comprising an intake door that adjusts the ratio of the vehicle, and a control unit that controls the operation of the mix door and the intake door. The intake door is disposed on the side where the inside air flows to the cool storage cooling mechanism, and the mix door is disposed on the side where the cool air passing through the cool storage cooling mechanism bypasses the heating mechanism. Characterized in that to.

  According to the present invention, there is an effect that it is possible to provide a vehicle air conditioner capable of extending the idle stop time.

It is the schematic of the vehicle air conditioner which concerns on embodiment of this invention. It is a figure which shows control of the mix door and an intake door at the time of the vehicle of the control means of the vehicle air conditioner which concerns on embodiment of this invention driving | running | working normally. It is a figure which shows an example of the setting of the correction value with respect to the vehicle speed of the control means of the vehicle air conditioner which concerns on embodiment of this invention. It is a figure which shows the other example of the setting of the correction value with respect to the vehicle speed of the control means of the vehicle air conditioner which concerns on embodiment of this invention. It is a figure which shows the other example of the setting of the correction value with respect to the vehicle speed of the control means of the vehicle air conditioner which concerns on embodiment of this invention. It is a figure which shows the other example of the setting of the correction value with respect to the vehicle speed of the control means of the vehicle air conditioner which concerns on embodiment of this invention. It is a flowchart when the control means of the vehicle air conditioner which concerns on embodiment of this invention selects cold storage heat air conditioning. It is a flowchart when the control means of the vehicle air conditioner which concerns on embodiment of this invention controls the action | operation of a mix door. It is a flowchart when the control means of the vehicle air conditioner which concerns on embodiment of this invention controls the action | operation of an intake door. Control combined with control of the mix door by the control means of the vehicle air conditioner according to the embodiment of the present invention and control of the intake door by the conventional control means, and control of the mix door and the intake door by the conventional control means, It is a figure which shows the change of the evaporator inlet temperature with respect to time, evaporator outlet temperature, vehicle interior blowing temperature, engine speed, and vehicle speed with respect to time. The control of the intake door by the control means of the vehicle air conditioner according to the embodiment of the present invention is combined with the control of the mix door by the conventional control means, and the control of the mix door and the intake door by the conventional control means, It is a figure which shows the change of the evaporator inlet temperature with respect to time, evaporator outlet temperature, vehicle interior blowing temperature, engine speed, and vehicle speed with respect to time. Evaporator inlet temperature with respect to time by control of mix door and intake door by control means of vehicle air conditioner according to embodiment of the present invention and control of mix door and intake door by conventional control means, and evaporator outlet temperature FIG. 6 is a diagram showing changes in the vehicle interior blowing temperature, the engine speed, and the vehicle speed. It is a flowchart when the control means of the vehicle air conditioner which concerns on embodiment of this invention controls the action | operation of a compressor.

  A vehicle air conditioner according to an embodiment of the present invention will be described with reference to FIGS.

  The vehicle air conditioner 1 according to the present embodiment includes a cool storage cooling mechanism 3 that has a cool storage agent and cools blown air, a heating mechanism 5 that heats cold air that has passed through the cool storage cooling mechanism 3, and the heating mechanism 5. The mix door 7 that adjusts the ratio of the cool air that passes through the regenerative cooling mechanism 3 and bypasses the heating mechanism 5 and the cool air that flows through the heating mechanism 5, and the regenerative cooling that is disposed upstream of the regenerative cooling mechanism 3 The intake door 9 that adjusts the ratio of the outside air outside the passenger compartment that flows to the mechanism 3 and the inside air inside the passenger compartment, and the control means 11 that controls the operation of the mix door 7 and the intake door 9 are provided.

  And the control means 11 arrange | positions the intake door 9 in the side which flows inside air to the cool storage cooling mechanism 3 when a vehicle heads to an idle stop, and the cool air which passed the cool storage cooling mechanism 3 bypasses the heating mechanism 5. The mix door 7 is arranged.

  In addition, when the vehicle heads for idle stop, the control means 11 sets the target blowing temperature into the passenger compartment to a correction value (a () for the first target blowing temperature (Xm) into the passenger compartment during normal traveling of the vehicle. The operation of the mix door 7 and the intake door 9 is controlled so that the second target blowing temperature (Xm1) given V)) is obtained.

  Further, the control means 11 is connected to at least a fuel cut detection means for detecting the fuel cut state of the vehicle and a vehicle speed detection means for detecting the speed of the vehicle. The fuel cut detection means detects the fuel cut, and the vehicle speed detection means. When the vehicle detects a deceleration state, it detects that the vehicle is approaching an idle stop.

  As shown in FIG. 1, the cold storage cooling mechanism 3 is a compressor that is arranged on the upstream side in the blower passage 13 through which blown air flows, and is connected to the interior of the condenser 15 via an engine 17, a pulley mechanism 19, and an electromagnetic clutch 21. The refrigerant compressed in 23 is introduced through the temperature type expansion valve 25, and the derived refrigerant constitutes a part of the refrigeration cycle where the refrigerant is compressed again by the compressor 23, and functions as an evaporator that is a heat exchanger for cooling. doing.

  The cool storage cooling mechanism 3 performs heat exchange between the outside air outside the passenger compartment that flows through the blower passage 13 or between the inside air inside the passenger compartment and the refrigerant by the blower 27, and cools the blown air that flows through the blower passage 13 to cool air. Let me.

  Such a cold storage cooling mechanism 3 is provided with a cold storage agent that stores cold heat during normal driving of the vehicle. By utilizing the cold energy stored in the cold storage agent, the blown air can be cooled to cold air when the vehicle is idle stopped.

  The heating mechanism 5 is disposed on the downstream side of the cold storage cooling mechanism 3 in the air passage 13. The heating mechanism 5 functions as a heater core that is a heat exchanger for heating, and heats the cold air that has passed through the cold storage cooling mechanism 3 to warm air.

  The mix door 7 is disposed in the blower passage 13 so as to be openable and closable between a flow passage on the upstream side of the heating mechanism 5 and a flow passage that bypasses the heating mechanism 5, that is, does not pass through the heating mechanism 5.

  This mix door 7 has passed the warm air passing through the heating mechanism 5 and the cold storage cooling mechanism 3 by adjusting the open / closed state of the flow path upstream of the heating mechanism 5 and the flow path bypassing the heating mechanism 5. The ratio of the cool air is adjusted to form an adjusted air having a predetermined temperature that flows into the passenger compartment.

  The intake door 9 is disposed upstream of the cold storage cooling mechanism 3 in the air passage 13 and is between an outside air introduction path 29 for introducing outside air outside the passenger compartment and an inside air introduction path 31 for introducing inside air inside the passenger compartment. It is arranged so that it can be opened and closed.

  The intake door 9 adjusts the ratio of the outside air and the inside air flowing toward the cold storage cooling mechanism 3 by adjusting the open / closed state of the outside air introduction passage 29 and the inside air introduction passage 31.

  The control means 11 includes a vehicle interior temperature detection means for detecting the temperature inside the vehicle compartment, an evaporative temperature detection means for detecting the temperature immediately after passing through the cold storage cooling mechanism 3, and an outside air that detects the temperature outside the vehicle compartment and the outside air condition. Detection means, solar radiation detection means for detecting the solar radiation situation, vehicle speed detection means for detecting the vehicle speed, vehicle interior set temperature detection means for detecting the temperature set by the occupant, and ON / OFF status of the air conditioner switch Connected to an air conditioner S / W detecting means for performing, an idle stop detecting means for detecting whether or not the vehicle is in an idle stop state, a fuel cut detecting means for detecting whether or not the vehicle is in a fuel cut state, and the like. Yes.

  This control means 11 controls the operation of the mix door 7 and the intake door 9 so that the temperature of the blown air flowing into the vehicle interior becomes the target blowing temperature based on the signal from each means.

  The control means 11 for controlling the operation of the mix door 7 and the intake door 9 as described above sets the first target blowing temperature (Xm), which is the target blowing temperature into the passenger compartment in the normal traveling state of the vehicle, by the following equation. Looking for.

  Xm = (A + D) × Tptc + B × Tamb−D × Tinc + C × Qsun + E

  Here, A is a coefficient of how many degrees Celsius first target blowing temperature is changed with respect to the indoor set temperature of 1 degree Celsius, and B is how many degrees Celsius first target blowing temperature is changed with respect to the outside air temperature of 1 degree Celsius. C is a coefficient indicating how many degrees Celsius first target blowing temperature is changed with respect to the amount of solar radiation 1 W / m 2, and D is how many degrees Celsius first target blowing temperature is changed with respect to the vehicle interior temperature 1 ° C. E is a coefficient for adjusting the numbers, Tptc (° C.) is the indoor set temperature, Tamb (° C.) is the outside air temperature, Tinc (° C.) is the vehicle interior temperature, Qsun (W / m2) is the amount of solar radiation.

  The control means 11 controls the operation of the mix door 7 and the intake door 9 during normal driving of the vehicle so that the first target blowing temperature (Xm) obtained based on such an expression is obtained.

  Here, when the vehicle is in the idling stop state, the blown air is cooled by using the cold energy stored in the cold storage agent of the cold storage cooling mechanism 3, but at this time, the control means 11 performs the first target blowing temperature. The operation state of the mix door 7 and the intake door 9 is controlled as shown in FIG.

  FIG. 2 shows the operation state of the mix door 7 and the intake door 9 in which the first target blowing temperature (Xm) is arranged on the horizontal axis. REC is the intake air circulation side and FRE is the intake door on the external air circulation side. 9 is arranged.

  On the other hand, the change indicated by the curve indicates the arrangement of the mix door 7, and when the warm air mix rate on the vertical axis is located on the lower side (low value), the full cool side is located, and the warm air mix rate is located on the upper side (high value). Indicates that the mix door 7 is arranged on the full hot side.

  As shown in FIG. 2, when the first target blowing temperature (Xm) is required to be somewhat low, the control means 11 arranges the intake door 9 on the inside air circulation side and moves the mix door 7 to the full cool side. It is arranged in.

  On the other hand, the control means 11 arrange | positions the intake door 9 in the external air circulation side, and arranges the mix door 7 in the full hot side, as 1st target blowing temperature (Xm) becomes high.

  By the way, when the vehicle continues in the idle stop state, the temperature of the cold air passing through the cold storage cooling mechanism 3 decreases when the cold heat stored in the cold storage agent decreases due to heat exchange between the cold storage agent of the cold storage cooling mechanism 3 and the blown air. Rises, that is, the blowing temperature rises.

  And when the threshold which a passenger | crew feels uncomfortable is exceeded, in order to start the compressor 23, the request | requirement which cancels | releases the idle stop of a vehicle is issued.

  Therefore, in order to extend the idle stop state of the vehicle, the control means 11 has a second target blowing temperature (Xm1) obtained by giving a correction value (a (V)) to the first target blowing temperature (Xm). The operation of the mix door 7 and the intake door 9 is controlled. In addition, 2nd target blowing temperature (Xm1) is obtained by the following formula | equation.

  Xm1 = Xm-a (V)

  The correction value (a (V)) in this equation is a temperature obtained by reducing the first target blowing temperature (Xm) to such an extent that the occupant does not become uncomfortable when it is detected that the vehicle is approaching idle stop. The second target blowout temperature (Xm1) is corrected.

  Here, the control means 11 indicates that the vehicle is approaching an idle stop, a signal notifying that the vehicle from the fuel cut detection means is in a fuel cut state, and that the vehicle from the vehicle speed detection means is in a deceleration state. Is detected by receiving a signal informing the user.

  The vehicle deceleration state determined by the control unit 11 based on the signal from the vehicle speed detection unit indicates, for example, a state in which the vehicle decelerates from a low-speed traveling state of about 40 km / h toward the stop, and is 80 km. It does not include a state where the vehicle decelerates from a high-speed traveling state of about / h to a low-speed traveling state of about 40 km / h.

  In this way, the control means 11 assumes that when there is no fuel supply to the engine 17 and the vehicle is about to stop, the vehicle is going to idle stop, and the target blowing temperature is set from the first target blowing temperature (Xm). Switch to the second target blowing temperature (Xm1).

  When the target blowout temperature is the second target blowout temperature (Xm1), the control means 11 is lower than the first target blowout temperature (Xm), and therefore closes the intake door 9 to the outside air introduction path 29 so as to circulate inside air. The mix door 7 is operated in a direction to close the upstream side of the heating mechanism 5 so as to lower the temperature of the air blown into the vehicle interior.

  Thus, before the vehicle enters the idle stop state, the control means 11 operates the intake door 9 and the mix door 7 so that the second target blowing temperature (Xm1) is lower than the first target blowing temperature (Xm). By controlling, it is possible to suppress the rise in the temperature of the blowout into the passenger compartment in the idle stop state of the vehicle, that is, to extend the rise time until reaching the temperature at which the idle stop is released, and to extend the idle stop time of the vehicle can do.

  Here, an example of setting the correction value (a (V)) will be described with reference to FIGS.

  The correction value (a (V)) shown in FIG. 3 is a target when, for example, the engine brake is in effect because the possibility of stopping is low at a specified speed of 40 km / h or higher. It is set to 0 in order to suppress the fluctuation frequency of the blowing temperature.

  On the other hand, the correction value (a (V)), for example, increases the possibility of stopping when the vehicle is less than a specified speed such as less than 40 km / h. The temperature is set so as to gradually increase so that the target blowout temperature does not become uncomfortable.

  The correction value (a (V)) reaches the upper limit of the target blowing temperature at which the occupant does not become uncomfortable when the vehicle has a very high possibility of stopping (for example, 10 km / h). Hold temperature.

  The correction value (a (V)) shown in FIG. 4 also increases the upper limit of the target blowing temperature at which the occupant does not become uncomfortable when, for example, control is performed to distribute air to the blowing outlet that is not directly exposed to the occupant. Therefore, the correction value (a (V)) shown in FIG. 3 is set so as to gradually increase according to the vehicle speed until the vehicle stops.

  The correction value (a (V)) shown in FIG. 5 reduces the fluctuation range of the target blowing temperature when the engine brake is applied when the vehicle becomes less than the specified speed, and the vehicle interior during traveling is reduced. The setting emphasizes comfort. Note that this variation may be stepped.

  The correction value (a (V)) shown in FIG. 6 increases the fluctuation range of the target blowing temperature when the vehicle is below the designated speed and the engine brake is applied, etc., and saves power during cooling. The setting emphasizes performance. Note that this variation may be stepped.

  In addition, a correction process equivalent to the correction value (a (V)) is performed on the indoor set temperature (Tptc) to provide the second indoor set temperature (Tptc2), thereby indirectly changing the target blowing temperature. May be.

  Regarding the control of the control means 11 for controlling the intake door 9 and the mix door 7 so as to obtain the second target blowing temperature (Xm1) obtained by giving such a correction value (a (V)), FIG. Description will be made with reference to the flowchart of FIG.

  As shown in FIG. 7, the control means 11 first determines from the air conditioner S / W detection means whether the air conditioner switch is ON or OFF (S1).

  When the air conditioner switch is ON, it is determined whether or not the position of the mix door 7 is an intermediate position (S2).

  When the air conditioner switch is OFF, a signal not performing cooling by the cold energy stored in the cold storage agent in the cold storage cooling mechanism 3 (here, the cold storage heat air conditioning signal = 0) is transmitted (S4).

  When the mix door 7 is at the intermediate position, the first target blowing temperature (Xm) is calculated (S3).

  When the mix door 7 is not in the intermediate position, the cold storage heat air conditioning signal = 0 is transmitted (S4).

  After calculating the first target blowing temperature (Xm), it is determined whether or not Xm is lower than the outside air temperature (S5). If Xm is higher than the outside air temperature, a regenerative heat air conditioning signal = 0 is transmitted (S4). .

  When the first target blowing temperature (Xm) is lower than the outside air temperature, it is detected from the fuel cut detecting means whether or not the vehicle is in a fuel cut state (S6).

  When the vehicle is in the fuel cut state, a signal for cooling by the cold stored in the cold storage agent in the cold storage cooling mechanism 3 (here, the cold storage air conditioning signal = 1) is transmitted (S7).

  If the vehicle is not in the fuel cut state, it is determined from the idle stop detection means whether the vehicle is in the idle stop state (S8).

  When the vehicle is in the idle stop state, a cold storage heat air conditioning signal = 1 is transmitted (S7), and when the vehicle is not in the idle stop state, a cold storage heat air conditioning signal = 0 is transmitted (S4).

  Next, control of the mix door 7 will be described with reference to FIG. As shown in FIG. 8, the control means 11 first determines whether the cold storage heat air conditioning signal is 1 or 0 (S9).

  When the regenerative heat air conditioning signal is 1, the vehicle speed is detected from the vehicle speed detection means (S10), the correction value (a (V)) is determined (S11), and the second target blowing temperature (Xm1) is determined. Calculate (S12).

  When the regenerative heat air conditioning signal is 0, the second target blowing temperature (Xm1) is set as the first target blowing temperature (Xm) (S13).

  And the control means 11 controls the action | operation of the mix door 7 based on the determined 2nd target blowing temperature (Xm1) (S14).

  Next, control of the intake door 9 will be described with reference to FIG. As shown in FIG. 9, the control means 11 first determines whether the cold storage heat air conditioning signal is 1 or 0 (S15).

  When the cold storage heat air conditioning signal is 1, the control means 11 controls the operation of the intake door 9 so as to circulate the inside air (S16).

  When the regenerative heat air conditioning signal is 0, the intake door 9 is operated so as to circulate the internal air when Xm is low and the external air circulation when Xm is high when the Xm is low. The intake door 9 is actuated so that, when Xm is between these, the intake door 9 is actuated so as to circulate inside and outside air (S17). Here, the operation of the intake door 9 is controlled by changing the first target blowing temperature (Xm) by 5 ° C., but the change of the first target blowing temperature (Xm) may be set as appropriate.

  Next, the control means 11 determines whether or not the intake door 9 is operating at a position where the outside air is circulated (S18). If the intake door 9 is located at the outside air circulation, the position of the intake door 9 is determined. Is held (S19).

  When the intake door 9 is not located at a position where the outside air circulation is performed, the control means 11 determines whether or not the intake door 9 is operated at a position where the inside / outside air circulation occurs (S20). When the intake door 9 is located in the inside / outside air circulation, the intake door 9 is held at a position where the outside air circulation is 20% (S21), and when the intake door 9 is not located in the inside / outside air circulation, the intake door 9 It is held at a position where it circulates (S16).

  Control of the mix door 7 and the intake door 9 by such control means 11 (solid line shown in FIG. 12), and control of the mix door 7 and the intake door 9 by conventional control means (one point shown in FIGS. 10 to 12) (Dotted line), control of the mix door 7 by the control means 11 and control of the intake door 9 by the conventional control means (dotted line shown in FIG. 10), control of the intake door 9 by the control means 11 and conventional control The inlet temperature (evaporator inlet temperature) of the cool storage cooling mechanism 3 and the outlet temperature (evaporator outlet temperature) of the cool storage cooling mechanism 3 by the control (two-dot chain line shown in FIG. 11) combined with the control of the mix door 7 by the control means. ), Vehicle interior blowout temperature, engine speed, and vehicle speed with respect to time are shown in FIGS.

  As shown in FIG. 10, the control of the mix door 7 and the intake door 9 by the conventional control means, the control of the mix door 7 by the control means 11 and the control of the intake door 9 by the conventional control means are combined. The control combined with the control of the mix door 7 by the control means 11 and the control of the intake door 9 by the conventional control means can lower the upper limit value of the vehicle interior blowing temperature during idling stop, and during idling stop. Warm and unpleasant blowing temperature due to weak cooling of the air can be avoided.

  On the other hand, as shown in FIG. 11, in the control combining the control of the intake door 9 by the control means 11 and the control of the mix door 7 by the conventional control means, the intake door 9 is switched to the inside air circulation, The time until the evaporator inlet temperature becomes low and the evaporator outlet temperature reaches the temperature at which the idle stop is canceled is extended, and the idle stop time can be extended. Further, the rise in the temperature in the passenger compartment is moderated, and the time required to reach an unpleasant temperature can be extended.

  On the other hand, as shown in FIG. 12, in the control of the mix door 7 and the intake door 9 by the control means 11, the second target value (a (V)) is given to the first target blowing temperature (Xm). By controlling the mix door 7 and the intake door 9 so as to reach the target blowout temperature (Xm1), the upper limit value of the blowout temperature in the vehicle interior during idling stop is lowered, and warm and uncomfortable due to weak cooling during idling stop. Can avoid excessive blowing temperature. Further, the rise in the evaporator outlet temperature becomes moderate, and the idle stop time can be extended.

  In such a vehicle air conditioner 1, the control unit 11 arranges the intake door 9 on the side where the inside air flows to the cold storage cooling mechanism 3 when the vehicle goes to idle stop, and the cold air that has passed through the cold storage cooling mechanism 3 A mix door 7 is disposed on the side bypassing the heating mechanism 5. Thus, when both doors are coordinated, the temperature in the passenger compartment can be lowered before the vehicle is idle stopped.

  Therefore, in such a vehicle air conditioner 1, before the vehicle is idle-stopped, the blowing temperature is lowered to such an extent that it is not uncomfortable for the occupant, the cool air in the vehicle compartment is stored, and the stored cool air is used as the inside air. Thus, the rise in the evaporator outlet temperature can be moderated and the idle stop time can be extended. Further, in a weak cooling scene during idle stop, the maximum blowing temperature can be lowered, and a warm and unpleasant blowing temperature can be avoided.

  Further, when the vehicle heads to idle stop, the control means 11 provides a second target blowout in which the target blowout temperature into the vehicle interior is given a correction value (a (V)) with respect to the first target blowout temperature (Xm). Since the operation of the mix door 7 and the intake door 9 is controlled so that the temperature (Xm1) is reached, the adjustment of the correction value (a (V)) adjusts the comfort of the passenger compartment and the power saving of the device. The idle stop time can be extended while improving the performance.

  Further, the control means 11 detects that the vehicle is heading to the idle stop when the fuel cut detection means detects the fuel cut and the vehicle speed detection means detects the deceleration state. Thus, the operations of the mix door 7 and the intake door 9 can be accurately controlled.

  In the vehicle air conditioner according to the present embodiment, the control means controls the operation of the mix door and the intake door when the vehicle goes to idle stop. In addition to this, the operation of the compressor May be controlled.

  For example, as shown in the flowchart of FIG. 13, after receiving the cold storage heat air conditioning signal, the control unit 11 detects the outlet temperature of the cold storage cooling mechanism 3 from the evaporator direct temperature detection unit (S22), and the cold storage heat air conditioning signal is received. It is determined whether it is 1 or 0 (S23).

  When the cold storage heat air conditioning signal is 1, for example, when the outlet temperature of the cold storage cooling mechanism 3 is 1.5 ° C. or lower, the electromagnetic clutch 21 is disconnected, and when it is 2.0 ° C. or higher, the electromagnetic The clutch 21 is connected and controlled so that the outlet temperature of the cold storage cooling mechanism 3 is in the range of 1.5 ° C. to 2.0 ° C. (S24).

  When the regenerative heat air conditioning signal is 0, for example, when the outlet temperature of the regenerative cooling mechanism 3 is 1.5 ° C. or lower, the electromagnetic clutch 21 is disconnected, and when it is 3.5 ° C. or higher, the electromagnetic The clutch 21 is connected and controlled so that the outlet temperature of the cold storage cooling mechanism 3 is in the range of 1.5 ° C. to 3.5 ° C. (S25).

  When the operation of the compressor 23 is controlled by the control means 11 in this way, the ON / OFF frequency of the electromagnetic clutch 21 can be minimized, and the exit temperature of the cold storage cooling mechanism 3 can enter an idle stop with a lower state. Idle stop time can be extended.

DESCRIPTION OF SYMBOLS 1 ... Vehicle air conditioner 3 ... Cold storage cooling mechanism 5 ... Heating mechanism 7 ... Mix door 9 ... Intake door 11 ... Control means Xm ... 1st target blowing temperature a (V) ... Correction value Xm1 ... 2nd target blowing temperature

Claims (3)

A cool storage cooling mechanism (3) that has a cool storage agent and cools blown air, a heating mechanism (5) that heats the cool air that has passed through the cool storage cooling mechanism (3), and an upstream side of the heating mechanism (5) A mix door (7) that adjusts the ratio of the cold air that passes through the cold storage cooling mechanism (3) and bypasses the heating mechanism (5) and the cold air that flows through the heating mechanism (5), and the cold storage cooling mechanism (3 ) And an intake door (9) that adjusts the ratio of outside air outside the vehicle compartment and inside air inside the vehicle compartment that flows to the cold storage cooling mechanism (3), the mix door (7), and the intake door (9) And a control means (11) for controlling the operation of the vehicle air conditioner,
The control means (11) arranges the intake door (9) on the side where the inside air flows to the cold storage cooling mechanism (3) when the vehicle goes to idle stop, and passes through the cold storage cooling mechanism (3). The vehicle air conditioner, wherein the mix door (7) is arranged on a side where cold air bypasses the heating mechanism (5). The vehicle air conditioner according to claim 1,
The control means (11) corrects the target blowout temperature into the passenger compartment with respect to the first target blowout temperature (Xm) into the passenger compartment during normal driving of the vehicle when the vehicle heads for idle stop. (V)) The air conditioner for vehicles which controls operation of the mix door (7) and the intake door (9) so that it may become the 2nd target blowing temperature (Xm1) which gave. The vehicle air conditioner according to claim 1 or 2,
The control means (11) is connected to at least a fuel cut detection means for detecting a fuel cut state of the vehicle and a vehicle speed detection means for detecting the speed of the vehicle, wherein the fuel cut detection means detects a fuel cut, An air conditioner for a vehicle, wherein when the vehicle speed detecting means detects a deceleration state, it detects that the vehicle is approaching an idle stop.

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