JP2010269628A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of providing a comfortable car interior space by performing a proper fluctuation control of a blast from an upper vent blowoff opening, and improving air conditioning feeling. <P>SOLUTION: The air conditioner for the vehicle includes a control part 40 of a blowoff opening fluctuation mechanism, such as an upper vent blowoff switching door actuator 38 capable of adjusting a blowoff fluctuation quantity ratio or a blowoff fluctuation cycle between a blowoff air from the upper vent blowoff opening 31a and the blowoff air from blowoff openings 33a, 34a of a front vent duct 30 in which a ventilation section area is largely set in comparison to the ventilation section area of the upper vent blowoff opening 31a by changing a door opening of the upper vent blowoff switching door 37. In the control part 40, the blowoff air quantity and temperature from the upper vent blowoff opening 31a is made to have a high cooling capacity in comparison to the blowoff air quantity and temperature from the front vent blowoff openings 33a, 34a so as to decrease thermal load fluctuation of the entire car interior temperature. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner used for vehicle interior air conditioning of an automobile.

  2. Description of the Related Art Conventionally, a vehicle air conditioner is known that is provided with four items of fluctuation mechanisms such as blowout mode fluctuation control (see Patent Document 1).

  Among such fluctuation mechanisms, the blowout mode fluctuation control is configured such that the fluctuation control is stopped when the target blowout temperature is other than a predetermined value.

  Further, in the air volume fluctuation control, the fluctuation control is configured to be stopped when the required air volume or the amount of solar radiation exceeds a predetermined value.

  And in this air volume fluctuation control, it is set as the structure which the air volume lower limit is set to become high with the increase in the amount of solar radiation.

  Further, in the upper surface portion of the instrument panel facing the vehicle interior, in the vicinity of the upper rear end on the vehicle interior side, an upper vent outlet that blows air toward the vehicle rear seat along the inner surface of the roof portion on the vehicle interior upper portion. However, what is provided is known.

  In such a case, when the blowing mode fluctuation control is switched and air is blown from the upper vent outlet, the air quantity fluctuation control is performed.

JP-A-7-237433

  However, in such a conventional vehicle air conditioner, there may be a case where the opening area of the upper vent outlet cannot be made large for the convenience of the vehicle such as the layout of the upper surface portion of the instrument panel.

  In such a case, inevitably, if the amount of air that can be blown is controlled from the upper vent outlet, there is a risk that the overall air amount may decrease.

  For this reason, when the blow mode fluctuation control is simply performed, there is a problem that it is difficult to stabilize the room temperature in the passenger compartment in a comfortable state by the air blown from the upper vent outlet.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle air conditioner that can appropriately control the fluctuation of the air blown from the upper vent outlet, improve the air conditioning feeling, and provide a comfortable vehicle interior space.

  In order to achieve the above object, the present invention provides a blowout air from an upper vent outlet and a blowout air from a front vent outlet having a larger ventilation cross-sectional area than the ventilation sectional area of the upper vent outlet. By changing the blowout fluctuation ratio or the blowout fluctuation cycle between and the door opening, an adjustable outlet fluctuation mechanism, and control for performing the door opening fluctuation drive control by the outlet fluctuation mechanism The control unit is configured to control the amount of air blown from the upper vent outlet or the temperature from the front vent outlet so that fluctuations in the thermal load of the entire cabin temperature are reduced. It is characterized by a vehicle air conditioner that has a higher cooling capacity than the air volume or temperature.

  According to the present invention, the control unit causes the air volume or temperature blown from the upper vent outlet to have a higher cooling capacity than the air volume or temperature blown from the front vent outlet. The thermal load variation over temperature is reduced.

  For this reason, even if the fluctuation drive control is performed by the control unit, the blowout fluctuation amount ratio or the blowout fluctuation period corresponding to the vehicle thermal load can be calculated to provide the optimum cooling performance in the vehicle interior.

  Here, it is known that the vehicle thermal load is large when the amount of solar radiation is large and the outside air temperature is high, takes a small value when the amount of solar radiation is small and the outside air temperature is low.

  Therefore, the fluctuation effect is appropriate regardless of the seasons, and the air conditioning feeling is improved.

  At this time, since the average room temperature in the passenger compartment is controlled so as not to be changed, for example, a temperature fluctuation that lowers the head located near the inner side of the roof of the passenger compartment by several degrees with the air blown from the upper vent outlet. Since the overall thermal load fluctuation is suppressed so that the average room temperature is not changed by calculating the vehicle temperature according to the vehicle thermal load, the air conditioning feeling of the body other than the occupant's head may be deteriorated. The air conditioning feeling can be improved.

It is a perspective view showing typically the position of each blower outlet of the instrument panel provided in the front of the vehicle interior in the vehicle air conditioner of the embodiment of the present invention. It is a block diagram which shows the positional relationship with each switching door of an air conditioning apparatus and a fan motor, and a control part with the vehicle air conditioner of embodiment. 1 is a schematic side view illustrating heat balance inside and outside a vehicle, and an air conditioner in which main parts cut along the vehicle front-rear direction are schematically enlarged. FIG. It is a flowchart explaining the air-conditioning control including fluctuation | variation control in the vehicle air conditioner of embodiment. In the vehicle air conditioner according to the embodiment, (a) is mainly a fluctuation mode in summer / spring / autumn among switching of blowing mode control for each season, and (b) is switching of blowing mode control for each season. Among them, the fluctuation mode mainly in winter, (c) is a table showing the opening degree, opening time, and closing time of the upper vent in each fluctuation mode A to X. The block diagram which shows the calculating part which receives the input of the signal from each sensor in the vehicle air conditioner of embodiment, and switches a control mode is a model explaining the relationship between an air-conditioner switching and an effect as an output result It is a typical state transition diagram. In the vehicle air conditioner of the embodiment of the embodiment, the fluctuation control for each season is mainly exemplified. (A) is a fluctuation mode in summer, (b) is a fluctuation mode A in spring and autumn, and (c) is The fluctuation mode B in spring / autumn, (d) is a schematic diagram for explaining the state of air volume distribution control in the fluctuation mode in winter. In the vehicle air conditioner of the embodiment, the relationship between the cooling capacity, (a) shows the state of the normal blowing mode in which the fluctuation control is performed, and (b) shows the state of the upper vent blowing mode in which the fluctuation control is performed. It is a partial sectional view of the typical air harmony device explained comparatively by showing a state. It is a graph which shows an example of fluctuation control in the vehicle air conditioner of embodiment, and represents an example of a basic pattern. The graph which shows an example of the fluctuation | variation cycle of the door opening degree which the fluctuation | variation mode was replaced in the vehicle air conditioner of an embodiment, the upper vent was closed, fluctuation | variation control was stopped, and the rest time Td stopped It is. In the vehicle air conditioner of an embodiment, it is a graph figure of the calorie balance state of the vehicle heat load which is the heat input from the exterior of vehicles, and the air conditioning capacity.

  Hereinafter, a vehicle air conditioner according to an embodiment of the present invention will be described with reference to the drawings.

  1 to 10 show a vehicle air conditioner according to an embodiment of the present invention.

  First, the overall configuration will be described. In the vehicle air conditioner of this embodiment, as shown in FIG. 3, an air conditioner 4 is provided in an instrument panel 3 provided in front of the vehicle compartment 2 of the vehicle 1. Is stored.

  In the air conditioner 4 of this embodiment, an outside air introduction port 6 for introducing outside air 9 from outside the vehicle 8 and an inside air introduction port for introducing inside air 10 in the passenger compartment 2 into the air conditioning device casing 5 as shown in FIG. 7 are each formed with an opening.

  The inside / outside air introduced into the air conditioner casing 5 can be switched by changing the door opening degree of the inside / outside air switching door 11 by driving the inside / outside air switching door actuator 12. .

  Further, the air conditioner casing 5 is provided with a blower fan device 13, and the sirocco fan 15 is rotated by the rotational drive of the blower motor 14, so that the outside air introduction port 6 or the inside air introduction port 7 is turned on. The introduced inside and outside air passes through the inside of the air conditioner casing 5 and is distributed and blown toward the inside of the passenger compartment 2.

  On the downstream side of the blower fan device 13 in the air conditioner casing 5, an evaporator 16 that cools the air that passes therethrough is stored.

  The evaporator 16 is connected to a compressor 17 that compresses the refrigerant, and the rotational driving force of a power source 18 such as a traveling engine is supplied to the compressor 17 from the pulley 19, the transmission belt member 20, and the magnet clutch 21. Communicated.

  Then, the compressed refrigerant is discharged from the compressor 17, and then introduced into the evaporator 16 from the expansion valve 24 connected via the condenser 22 and the liquid tank 23. When passing through the evaporator 16, the temperature of the air sent from the fan device 13 is lowered.

  Further, an air mix door 25 is provided on the downstream side of the evaporator 16 in the air conditioner casing 5.

  In this air mix door 25, the air introduced into the air conditioner casing 5 moves toward the heater core 27 by changing the door opening degree by driving the air mix door actuator 26, or as it is, From the front vent duct 30, the upper vent duct 31, or the foot duct 32 to which the foot outlet 32a provided at the occupant's foot is connected, whether the air is blown inward of the passenger compartment 2 can be switched. It is configured.

  Among these, center vent ducts 33 and 33 and side vent ducts 34 and 34 constituting the front vent are connected to the front vent duct 30 continuously.

  As shown in FIG. 1, the center vent ducts 33 and 33 and the side vent ducts 34 and 34 include a front vent outlet formed in the center rear side surface portion 3 a of the surface side of the instrument panel 3. The peripheral edges of the air outlets 33a and 33a as one of the air outlets and the peripheral edges of the air outlets 34a and 34a as one of the front vent air outlets formed in the left and right rear side surfaces 3b and 3b are connected. ing.

  The air that has passed through the center vent ducts 33 and 33 and the side vent ducts 34 and 34 is distributed from the air outlets 33a and 33a and the air outlets 34a and 34a toward the inside of the passenger compartment 2. It is comprised so that ventilation can be performed.

  Further, an air outlet mode switching door 35 is provided between the front vent duct 30 and the foot duct 32 as shown in FIG.

  The blowing mode switching door 35 is provided with a blowing mode switching door actuator 36 that can change the opening degree of the blowing mode switching door 35 by driving.

  Then, the air opening mixed with air in the air conditioner casing 5 is changed through the front vent duct 30 by changing the door opening degree of the blowing mode switching door 35 by driving the blowing mode switching door actuator 36. Then, the air is blown from the center vent ducts 33 and 33 or the side vent ducts 34 and 34 toward the rear in the passenger compartment 2 or from the foot duct 32 toward the feet of the passengers in the passenger compartment 2. It is configured to be switchable.

  Further, the upper vent duct 31 is attached to the periphery of an upper vent opening 31b formed between the ventilation path 31c of the upper vent duct 31 and the air conditioner casing 5, and the upper vent opening 31b. An upper vent blow switching door 37 that can be opened and closed is provided.

  The upper vent duct 31 is connected to the upper vent duct 31 by changing the door opening degree of the upper vent outlet switching door 37 by driving the upper vent outlet switching door actuator 38. As shown in FIG. 3, from the upper vent blower opening 31a formed in the central upper surface 3c of the instrument panel 3, the user sits down on the front seat 2b along the ceiling lower surface 2a. The amount of air blown in the direction of the rear seat 2c through the passenger's head is adjustable between 0% and 100%.

  And by changing and controlling the opening degree of the upper vent blow switching door 37, the air blow from the upper vent blow outlet 31a and the blow blow from the blow vents 33a, 33a and 34a, 34a of the front vent are controlled. The blower fluctuation mechanism which makes it possible to adjust the blowout fluctuation amount ratio or the blowout fluctuation cycle is configured.

  In this embodiment, compared to the ventilation cross-sectional area S1 of the upper vent air outlet 31a, the air vent cross-sectional area of the front vent duct 30 that blows air to the air outlets 33a, 33a and 34a, 34a as the front vent air outlets. S2 is set to be large.

  The blower motor 14, the compressor 17, the inside / outside air switching door actuator 12, the air mix door actuator 26, the blowing mode switching door actuator 36, and the upper vent blowing switching door actuator 38 are controlled by the automatic air conditioner temperature control of the air conditioner 4. The control unit 40 performs fluctuation drive control of the automatic air conditioner outlet and fluctuation drive control of the door opening degree of the outlet fluctuation mechanism.

  As shown in FIG. 6, a solar radiation sensor 41 as a thermal load sensor for detecting a vehicle thermal load and an outside air temperature sensor 42 are connected to the control unit 40.

  Here, the vehicle heat load is the amount of heat that enters the passenger compartment due to solar radiation and outside air temperature, and the outside air temperature is high. When it is low, it is known to take a small value.

  Further, as shown in FIG. 11, the difference between the outside air temperature and the room temperature inside the passenger compartment 2 of the vehicle 1 is larger, that is, the lower the room temperature inside the passenger compartment 2 is, the more heat input from the outside is. For example, as shown in FIG. 3, when the outside air temperature is about 30 ° C. and the amount of solar radiation is large, such as in summer, the vehicle heat load increases.

  For this reason, the cooling capacity of the air conditioner 4 must also be set larger than when the difference between the room temperature inside the passenger compartment 2 and the outside temperature in spring and autumn is small, for example, as shown in FIG. In such a state, when the heat quantity in and out is balanced and the temperature in the passenger compartment 2 is maintained in a balanced state around 25 ° C., for example, in the vehicle 1, as shown in FIG. It can be seen that the capacity should be about 450W.

  In this embodiment, the solar radiation amount data and the outside air temperature data detected by the solar radiation sensor 41 and the outside air temperature sensor 42 are used as a heat load detection signal indicating whether the vehicle heat load is large or small. It is output to the means 43.

  The vehicle thermal load calculation means 43 is configured to calculate vehicle thermal load data based on the input solar radiation amount data and outside air temperature data.

  Further, the control unit 40 includes an automatic air conditioner outlet calculation unit 44 that is connected to the vehicle thermal load calculation unit 43 and receives vehicle thermal load data sent from the vehicle thermal load calculation unit 43. , Provided.

  The automatic air conditioner outlet calculating means 44 detects the temperature in the passenger compartment 2 of the vehicle 1 together with the solar radiation sensor 41 and the outside air temperature sensor 42 as the thermal load sensor, and this automatic air conditioner outlet calculating means 44. Further, an indoor temperature sensor 46 that transmits an indoor temperature signal is connected.

  The automatic air conditioner outlet calculating means 44 includes a target temperature setter 47 which is arranged in an air conditioner operation section provided in the instrument panel 3 and can arbitrarily set a set temperature of the auto air conditioner, and the upper An upper vent ON / OFF switch 48 for switching the air blown from the upper vent outlet 31a toward the interior of the vehicle compartment 2 through the vent duct 31 through the opening and closing of the upper vent outlet switching door 37; Is connected.

  The controller 40 further stores a plurality of fluctuation control pattern maps corresponding to the magnitude and smallness of the vehicle thermal load data calculated by the vehicle thermal load calculating means 43, and these fluctuations. Fluctuation control pattern map storage means 45 is provided in which each door opening data, door opening time data, and door closing time data included in the control pattern map is stored so as to be readable and writable.

  The fluctuation control pattern map storage means 45 of this embodiment is connected to the automatic air conditioner outlet calculation means 44, and when the blowout air blows out from the foot outlets 32a, 32a, the amount of solar radiation and the outside air temperature. Thus, a fluctuation control stop pattern for turning off the control based on the fluctuation control pattern map is stored.

  The automatic air conditioner outlet computing means 44 is connected to an upper vent outlet switching door actuator 38 and an outlet mode switching door actuator 36 as the outlet fluctuation mechanism.

  In the automatic air conditioner outlet calculation means 44, the fluctuation drive control in which the ratio of the quantity of fluctuation of the blowout or the period of fluctuation of the blowout is adjusted by changing the door opening of each of the upper vent blowout switching door 37 and the blowout mode switching door 35. Is configured to be performed.

  That is, for example, in the automatic air conditioner outlet calculation means 44 of this embodiment, when the vehicle thermal load calculation means 43 calculates the vehicle heat load high and low, the vehicle heat load high and low are calculated. The corresponding heat load data is output to the automatic air conditioner outlet calculating means 44.

  In the automatic air conditioner outlet calculation means 44, a fluctuation control pattern map corresponding to the heat load data is read from the fluctuation control pattern map storage means 45, and the inside / outside air switching door as the outlet fluctuation mechanism is read out. Fluctuation drive control of each door opening of the actuator 12, the air mix door actuator 26, the blowing mode switching door actuator 36, and the upper vent blowing switching door actuator 38 is performed.

  Furthermore, in this embodiment, by the fluctuation drive control, the upper vent blow switching door actuator 38 and the blow mode switching door actuator 36 change the fluctuation amount stepwise according to the high and low of the vehicle thermal load. A basic fluctuation pattern as shown in FIG. 9 stored in advance is stored for the door opening, the door opening time, and the door closing time.

  Further, the automatic air conditioner outlet calculating means 44 of this embodiment actually outputs control signals to the upper vent outlet switching door actuator 38 and the outlet mode switching door actuator 36 so that the time as shown in FIG. When a fluctuation cycle of the chart is generated, a plurality of different door opening change amounts and door opening times in the basic fluctuation pattern Bp calculated and stored in accordance with the thermal load in the fluctuation control pattern map. Are generated as a fluctuation cycle of the time charts that are sequentially replaced and rearranged, and the door openings of the upper vent blowing switching door actuators 38 and the blowing mode switching door actuators 36 are changed based on the fluctuation cycles. It is comprised so that.

  The automatic air conditioner outlet calculating means 44 of the embodiment actually outputs control signals to the upper vent outlet switching door actuator 38 and the outlet mode switching door actuator 36, and is a time chart as shown in FIG. When generating a fluctuation cycle, a fluctuation control stop pattern in which ON and OFF are performed when air is blown from the foot outlet 32a is interposed between fluctuation cycles of this time chart, and the fluctuation control pattern By turning off the control by the map, a fluctuation stop time Td in which the fluctuation drive control is temporarily stopped is provided.

  Furthermore, in this embodiment, when the opening degree of the upper vent blow switching door 37 provided in the upper vent opening 31b is switched by the upper vent blow switching door actuator 38, when the upper vent blow switching door 37 is opened, When opening the upper vent blow switching door 37 directly in a short time, it takes several steps, for example, three steps when the opening / closing amount is small, five steps when the opening / closing amount is large, etc. By closing in stages, the time required for opening and closing the doors is made different.

  Among these, when closing the upper vent blow switching door 37, it is divided into a plurality of stages and is not continuously closed. This prevents the so-called whistling sound from being generated when the upper vent blow switching door 37 is opened in a small amount. Because of that.

  And the ratio of blowing fluctuation between the blowing air from the upper vent outlet 31a and the blowing air from the outlets 33a, 33a and the outlets 34a, 34a of the front vent duct 30 or the blowing fluctuation period is the The upper vent blowing switching door actuator 38 and the blowing mode switching door actuator 36 are configured so as to be changed and adjustable depending on the door opening, the door opening time, and the door closing time.

  And the amount of blowing air from the upper vent air outlet 31a and the temperature of the air flow are set to the air outlets 33a, 33a and 34a, 34a of the front vent duct 30 so as to reduce the thermal load fluctuation of the entire interior temperature of the passenger compartment 2. Compared to the amount of blown air from the air and the temperature of the air, it is configured to have a high cooling capacity.

  In this embodiment, the change in the amount of air flow at the upper vent as air conditioning switching is adjusted by the door opening degree, the door opening time, and the door closing time of the upper vent blowing switching door 37, and each outlet 33a of the front vent duct 30 is adjusted. , 33a and 34a, 34a, the opening degree of the door, the door opening time, and the door closing time are adjusted, and are shown in the summer shown in FIG. 7A and in FIGS. 7B and 7C. It is configured to exhibit the vent fluctuation effect of spring and autumn seasons A and B.

  That is, as shown by the vertical axis in FIGS. 9 and 10, the opening degree of the upper vent blow switching door 37, which is the amount of air blown from the upper vent blower outlet 31 a, blows out the air flow from the front vent duct 30. Since it coincides with the degree of closing of the mode switching door 35, the center vent opening% = about 100% -upper vent opening% shown in FIG.

  Further, the opening degree of the foot outlet 32a is adjusted according to the control value calculated by the automatic air conditioner outlet calculating means 44 regardless of the upper vent opening degree% shown in FIG. It is configured to be.

  Further, in this embodiment, in addition to the change in the blowout air volume of the upper vent, the airflow volume from the foot outlet 32a is changed by the air conditioning switching by the blowout mode switching door actuator 36. By adjusting the temperature, the door opening time, and the door closing time, the vent fluctuation effect in winter is exhibited.

  Next, the concept of air conditioning control that can obtain desired comfort without increasing the cooling capacity in the vehicle air conditioner of this embodiment will be described with reference to FIG.

  As shown in FIG. 8A, when the normal blow mode is selected by the upper vent ON / OFF switch 48 in the fluctuation control in summer, the air volume F1 from the blower fan device 13 is increased. By increasing the cooling power of the evaporator 16, the amount of cold air sent out from the front vent duct 30 is reduced to a temperature at which the passenger in the passenger compartment 2 feels comfortable, thereby performing air conditioning control. Yes.

  For this reason, the air outlets 33a and 34a of the front vent duct 30 must be opened to give a large cooling power to the air flow F2 having a large air volume, and the above-described connection to the evaporator 16 shown in FIG. The reheat amount must be increased by the heater core 27 while increasing the work amount of the compressor 17.

  On the other hand, as shown in FIG. 8B, when the upper vent blowing mode is selected by the upper vent ON / OFF switch 48 in the fluctuation control in summer, the blower fan device 13 The air volume F3 may be medium, and the ceiling portion in the passenger compartment 2 is cooled by cold air that does not pass through the heater core 27 even if the air volume F4 blown from the upper vent air outlet 31a through the upper vent duct 31 is small. Since the air is blown out toward the rear seat along the lower surface 2a, the vicinity of the head of the occupant can be efficiently cooled.

  Therefore, the air volume from each outlet 33a, 34a of the front vent duct 30 can be reduced without lowering the room temperature, and the cooling power required for the blower F5 can be reduced, and the reheat amount in the heater core 27 can be reduced. In addition, it is not necessary to increase the cooling capacity, and the amount of work of the compressor 17 connected to the evaporator 16 can be reduced.

  For this reason, the work amount of the compressor 17 can be reduced to save energy.

  Next, the effect of the vehicle air conditioner of this embodiment is demonstrated along the flowchart shown in FIG.

  In this embodiment, first, when the air conditioning control of the air conditioner 4 is started in Step 1, in Step 2, reading of detection values by the solar radiation sensor 41, the outside air temperature sensor 42, and the indoor temperature sensor 46 shown in FIG. Are read by the target temperature setter 47 and the upper vent ON / OFF switch 48 and sent to the control unit 40.

  In Step 3, the automatic air conditioner outlet calculation means 44 of the control unit 40 performs an outlet calculation as a normal automatic air conditioner.

  In Step 4, the amount of solar radiation detected by the solar radiation sensor 41 and the outside air temperature detected by the outside air temperature sensor 42 are used, and the fluctuation mode corresponding to the heat load is shown in FIGS. ) Is calculated as in the example shown in FIG.

  In Step 5, a calculation for determining whether or not to perform fluctuation control is performed.

  Here, in this embodiment, the determination items include whether the target blowing temperature is equal to or higher than a predetermined value and lower than the predetermined value, whether the outlet position is a bi-level or a defroster position, It is determined whether or not the ON / OFF switch 48 is in the ON state and whether or not the fluctuation mode shown in FIGS. 5A and 5B is other than X.

  In Step 6, if all of the above determinations are YES, the process proceeds to the next Step 7, and if there is one that is not YES in the above determination, the process proceeds to Step 8, and the normal auto without fluctuation control is performed. Air conditioner control is selected and executed.

  When automatic air conditioner control with fluctuation control added is selected and executed in Step 7, in the next Step 9, the door opening, door opening time, door closing time, and rest time corresponding to each mode A to F are set as described above. Read from the fluctuation control pattern map storage means 45. For example, it is as shown in FIG.

  In Step 10, the fluctuation control pattern map read from the automatic air conditioner outlet calculating means 44 of the control unit 40 is used in accordance with the time chart generated based on the basic pattern shown in FIG. , Fluctuation drive control of the door opening degree of each blowing mode switching door 35 and upper vent blowing switching door 37 driven by the upper vent blowing switching door actuator 38 is performed, a swing operation is performed, and the air conditioning control is finished at Step 11.

  In this embodiment, if there is one or more conditions in which the fluctuation control is not performed in Step 5, and it is determined in Step 6 that the fluctuation control is OFF, the automatic air conditioner blowing shown in FIG. The exit calculation means 44 is sent from the indoor temperature sensor 46 as the temperature in the passenger compartment 2 of the vehicle 1 together with the solar radiation amount data and the outside air temperature data sent from the solar radiation sensor 41 and the outside air temperature sensor 42. A room temperature signal is received, and a drive control signal is transmitted to the blowing mode switching door actuator 36 so that the temperature in the passenger compartment 2 approaches the temperature set value sent from the target temperature setter 47. .

  The blow mode switching door actuator 36 receives the drive control signal and receives the blow outlets 33a, 33a and 34a, 34a of the front vent duct 30 or the foot blow outlets 32a, 32a or the blow outlets 33a, 34a and Of the bi-level (B / L blowout) that is both the foot blowout openings 32a, switching is performed so that air is blown from the optimum blowout openings.

  In this embodiment, on the basis of the ON / OFF information from the upper vent ON / OFF switch 48, a drive signal is sent from the automatic air conditioner outlet computing means 44 to the upper vent outlet switching door actuator 38. Thus, the opening degree of the upper vent blowing switching door 37 is controlled to be manually opened and closed.

  At this time, if all of the conditions for performing the fluctuation control are satisfied at Step 5 and if it is determined at Step 6 that the fluctuation control is ON, it is further sent from the vehicle thermal load calculating means 43. Based on the thermal load data, the fluctuation mode in consideration of the thermal load is selected from (a) and (b) in FIG.

  Further, according to the fluctuation control pattern map shown in (c) of FIG. 5, the actual fluctuation cycle in which the replacement shown in FIG. 10 is performed from the basic pattern shown in FIG. Calculated.

  Then, a drive control signal based on this actual fluctuation cycle is sent from the automatic air conditioner outlet computing means 44 to the upper vent outlet switching door actuator 38, so that the upper vent outlet switching door 37 can be controlled. The opening degree of the door is controlled by fluctuation, and the fluctuation is controlled by sending a fluctuation drive signal to the blowing mode switching door actuator 36.

  For this reason, as shown in FIG. 7, at the intervals of 8/16/60 seconds, etc., in the summer shown in FIG. 7 (a) and in the spring / autumn seasons A and B shown in FIGS. The blowing from the upper vent outlets 31a, 31a and the blowing from the outlets 33a, 33a or 34a, 34a of the front vent duct 30 are alternately switched.

  In the winter season shown in FIG. 7 (d), the ventilation from the upper vent outlets 31a and 31a and the delivery from the outlet of the foot duct 32 are alternately switched at intervals of 8/16/60 seconds or the like. .

  Then, as shown in FIG. 8 (b), the ventilation from the upper vent outlet 31a, 31a causes the thermal load fluctuation of the entire interior temperature of the passenger compartment 2 to be reduced by the ventilation from the upper vent outlet 31a, 31a. The blowing air volume or temperature is set to a high cooling capacity as compared with the blowing air volume or temperature from the air outlets 33a, 33a or 34a, 34a of the front vent duct 30.

  For example, even with the same blown air volume, the air passing through the heater core 27 is mixed by swing-controlling the air mix door 25, and the blowout temperature (for example, from the blowout ports 33a, 33a or 34a, 34a) , About 17 ° C), the outlet temperature from the upper vent outlets 31a, 31a (for example, about 14 ° C) is set to be lower.

  As shown in FIG. 3, the air blown from the upper vent outlets 31a and 31a passes along the ceiling lower surface side 2a in the passenger compartment 2 through the vicinity of the head of the occupant seated in the front seat 2b, and the rear seat. The air is blown in the 2c direction.

  For this reason, even when the room temperature in the passenger compartment 2 is stable, the temperature around the occupant's head, which tends to be slightly hot, can be efficiently cooled by the air blowing from the upper vent outlet 31a.

  At this time, the temperature around the occupant's head is obtained by temperature fluctuation control that is lowered by several degrees from the stable room temperature in the passenger compartment 2.

  In addition, this temperature fluctuation control is performed using a fluctuation control pattern and a fluctuation cycle by using a fluctuation amount and a fluctuation cycle obtained according to the vehicle body thermal load so that the fluctuation of the thermal load of the entire vehicle interior temperature is reduced. Has been generated.

  For this reason, the fluctuation effect becomes appropriate regardless of the seasons, and the air conditioning feeling can be improved.

  Furthermore, since the overall thermal load fluctuation is suppressed so that the average room temperature is not changed, the possibility that the air conditioning feeling of the body other than the head of the occupant will be reduced is reduced. Air conditioning feeling can be improved.

  In addition, in this embodiment, as shown in FIG. 2, the front vent duct ventilation cross-sectional area S2 for blowing air to the front vent outlets 33a and 33a is compared with the ventilation cross-sectional area S1 of the upper vent outlet 31a. , Is set to be larger.

  Therefore, even if the temperature around the occupant's head is lowered by several degrees from the stable room temperature in the passenger compartment 2 by temperature fluctuation control, the air volume at the front vent outlets 33a and 33a can be secured. The heat load fluctuation of the entire temperature in the passenger compartment 2 can be easily reduced.

  In addition, since the ventilation cross-sectional area S1 of the upper vent outlet 31a is set smaller than the front vent duct ventilation cross-sectional area S2 that blows air to the front vent outlets 33a and 33a, as shown in FIG. The opening area of the upper vent 31a, 31a can be set small, and the degree of freedom of the layout on the instrument panel 3 can be improved.

  Further, as shown in FIGS. 5A to 5C, the control unit 40 is provided with the solar radiation sensor 41 and the outside air temperature sensor 42 to be connected, and the vehicle thermal load is high and low. Is calculated by the vehicle thermal load calculating means 43.

  A plurality of fluctuation control pattern maps according to the vehicle heat load calculated by the vehicle thermal load calculation means 43 are stored in the fluctuation control pattern map storage means 45.

  For this reason, when the fluctuation drive control of each door opening degree is performed by the upper vent blow switching door actuator 38 and the blow mode switching door actuator 36, the fluctuation amount is determined according to the high and low of the vehicle thermal load. Can be varied step by step.

  As described above, when the upper vent is blown out, a plurality of fluctuation control patterns corresponding to the high and low vehicle thermal loads are provided depending on the amount of solar radiation and the outside air temperature.

  Therefore, in particular, in the summer season, if the fluctuations are simple, the amount of air blown from the upper vent outlets 31a, 31a is small, so the overall air volume may be reduced and the cooling feeling may be insufficient. If the outside air temperature is high and the vehicle heat load is high, the fluctuation of the fluctuation control amount is reduced, and if the amount of solar radiation is low and the outside air temperature is low, the fluctuation of the vehicle heat load is assumed to be low. The control amount can be configured to be relatively large.

  Accordingly, since the fluctuation control amount is set to be small in summer and the like, there is no possibility that the amount of air blown from the upper vent outlets 31a, 31a will be interrupted or excessively reduced, resulting in insufficient cooling power. There is no.

  In addition, as in the mode X shown in FIGS. 5A to 5C, the fluctuation control pattern map storage unit 45 of this embodiment has a blowing air blown from the foot outlet 32a in winter or the like. Furthermore, a fluctuation control stop pattern for turning off the control based on the fluctuation control pattern map is stored according to the amount of solar radiation and the outside air temperature.

  In this embodiment, even if the amount of solar radiation is small, if the outside air temperature is relatively high, there is a possibility that the head of the occupant may feel uncomfortable, so fluctuation control is performed.

  Similarly, even when the outside air temperature is relatively low, the fluctuation control is performed even when the amount of solar radiation is large.

  And, when the outside air temperature is low and the amount of solar radiation is small, such as in winter, the amount of air required for heating without performing fluctuation control when the air blown from the foot outlet 32a is assumed to be large. Is secured.

  For this reason, required air conditioning can be performed without impairing the air conditioning feeling.

  Furthermore, in this embodiment, as shown in FIG. 10, the fluctuation control pattern map storage means 45 calculates and stores a plurality of the basic fluctuation patterns Bp shown in FIG. The door opening change amount and the door opening time are sequentially changed, and the door opening is changed based on the fluctuation cycle of the rearranged time chart.

  For this reason, the opening / closing operation of the upper vent blowing switching door 37 and the blowing mode switching door 35 does not become a simple swing, but fluctuations closer to natural wind can be realized in a fluctuation cycle in which air is actually blown.

  Moreover, in this embodiment, as a fluctuation cycle that takes into account the balance with the thermal load fluctuations of the vehicle, it is not simply a random value, but a basic basic pattern as shown in FIG. 9 is calculated, By alternately combining the opening degree, opening time, and closing time data used in this basic pattern, the air can be blown so as not to impair the cooling ability and the heating ability while obtaining a natural fluctuation effect.

  Further, in this embodiment, as shown in FIG. 10, a fluctuation stop time Td for stopping fluctuation drive control is provided during the fluctuation cycle of the time chart by turning off the control based on the fluctuation control pattern map. Thus, a fluctuation control stop pattern is generated.

  For this reason, the upper vent blow switching door actuator 38 and the blow mode switching door 35 for operating the upper vent blow switching door 37 are operated by providing a rest time in a range where the air conditioning feeling of the passenger in the passenger compartment 2 is not deteriorated. Fluctuation control can be realized without increasing the cost of the blowout mode switching door actuator 36.

  Further, in this embodiment, the upper vent blow switching door actuator 38, which can adjust the opening degree of the upper vent blow switching door 37 provided at the upper vent blow port 31a, varies the time required for opening and closing the door. It is configured.

  That is, in this embodiment, when the opening degree of the upper vent blow switching door 37 provided in the upper vent blow outlet 31a is switched by the upper vent blow switching door actuator 38, the upper vent blow switching door 37 is opened. Can be opened directly in a short time and the upper vent blow switching door 37 is closed in a plurality of stages, for example, three stages when the opening / closing amount is small, and five stages when the opening / closing amount is large. The time required for opening and closing the doors is made different by closing in stages.

  For this reason, when air is blown against the occupant's face in the passenger compartment 2, the air-conditioning feeling is further improved by instantaneously increasing the air volume.

  Moreover, when stopping the ventilation to a passenger | crew's face, it reduces gradually in steps and further improves the air-conditioning feeling.

  In addition, in this embodiment, when the upper vent blowing switching door 37 is closed, it is not continuously closed as a plurality of stages, so that the so-called whistling noise is prevented when the upper vent blowing switching door 37 is opened in a small amount. Is done.

  3, 6 and 7 mainly show an air conditioner 104 as a vehicle air conditioner according to an embodiment of the vehicle air conditioner.

  Note that portions that are the same as or equivalent to those in the above-described embodiment are described with the same reference numerals.

  In the air conditioner 104 of this embodiment, the blowing mode switching door 35 shown in FIG. 3B is switched by the blowing mode switching door actuator 36 shown in FIG. It is configured so that it is possible to select whether the air is blown into the passenger compartment 2 from either the outlets 32a, 32a or the outlets 33a, 33a of the center vent duct 33 as a front vent duct. Yes.

  Therefore, in summer and spring and autumn seasons A and B in FIG. 7, the outlets 33a and 33a of the center vent duct 33 as a front vent duct are opened by the outlet mode switching door 35 as shown in FIG. Then, by switching the foot duct 32 so as to be closed, the vent fluctuation control between the upper vent outlet 31a and the outlet 33a of the center vent duct 33 is performed, and the fluctuation effect is obtained. can get.

  Further, in the winter season shown in FIG. 7D, as shown in FIG. 6, the outlets 33a and 33a of the center vent duct 33 as the front vent duct are closed by the outlet mode switching door 35. By switching the foot duct 32 to be opened, vent fluctuation control between the upper vent outlet 31a and the foot outlet 32a of the foot duct 32 is performed, and a fluctuation effect is obtained.

  Therefore, in the automatic air conditioner outlet calculating means 44 of this embodiment, the control signal is actually output to the upper vent outlet switching door actuator 38 and the outlet mode switching door actuator 36, and the time as shown in FIG. When generating the fluctuation cycle of the chart, if the outside air temperature is low and the amount of solar radiation is low, such as in winter, the fluctuation control is not performed because the required heating amount is large, and the blowing air volume required for heating must be secured. It is determined that this is not the case.

  Then, when air is blown from the foot outlet 32a, the fluctuation control is stopped during the fluctuation cycle of this time chart as shown in FIG. The control by the fluctuation control pattern map is turned off.

  Therefore, the air conditioning feeling can be improved by further improving the heating efficiency.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment, and thus description thereof is omitted.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  That is, in the above embodiment, as an air conditioner for a vehicle, in the embodiment, the air conditioner 4 having the configuration as shown in FIG. 2 is used, and in the one example of this embodiment, as shown in FIG. The air conditioner 104 has been shown and described. However, the present invention is not limited to this. For example, a rear seat duct provided with a rear seat outlet for blowing air at the foot of an occupant of the rear seat, or the vicinity of a roof roof rail It may be a vehicle air conditioner equipped with a rear seat ceiling duct or the like provided with a rear seat side head outlet for blowing air to the rear seat occupant, and the rear seat duct or The rear seat ceiling duct or the like may or may not be used as the front vent duct, and the front vent air outlet 31a may be used as the front vent air outlet compared to the ventilation cross-sectional area S1 of the upper vent air outlet 31a. If the cross-sectional area S2 of the front vent duct 30 that blows air to the outlets 33a, 33a and 34a, 34a is set to be large, the shape, quantity, and material of the duct of the vehicle air conditioner are There is no particular limitation.

  Moreover, in the said embodiment, the blowing mode switching door 35 is rotationally driven by the blowing mode switching door actuator 36 which can change a door opening degree, and the air mixed in the said air conditioner casing 5 is The air is blown from the center vent ducts 33 and 33 or the side vent ducts 34 and 34 through the front vent duct 30 in the rearward direction in the passenger compartment 2 or from the foot duct 32 to the passengers in the passenger compartment 2. However, the present invention is not limited to this. For example, even if a slide door shown as the air mix door 25 in FIG. 3 is used, the upper vent outlet is used. The ratio of the air flow fluctuation between the air blown from 31a and the air blown from the front vent air outlets 33a, 34a or the airflow fluctuation cycle is determined by the door opening degree. Therefore, any door and drive mechanism that can be adjusted by changing the shape may be used as the air outlet fluctuation mechanism, and the shape, quantity, and material of each door are not particularly limited. .

2 Cabin 4,104 Air conditioner (vehicle air conditioner)
30 Front vent duct 31 Upper vent duct 31a Upper vent outlet 32 Foot duct 32a Foot outlet 33 Center vent duct (part of front vent duct)
33a Air outlet (part of front vent air outlet)
34 Side vent duct (part of front vent duct)
34a Air outlet (a part of the front vent air outlet)
35 Air outlet mode switching door (air outlet fluctuation mechanism)
36 blow mode switching door actuator 37 upper vent blow switching door 38 upper vent blow switching door actuator 41 solar radiation sensor (one of thermal load sensors)
42 Outside air temperature sensor (one of thermal load sensors)
43 Vehicle heat load calculation means 44 Automatic air conditioner outlet calculation means 45 Fluctuation control pattern map storage means Td Fluctuation stop time Bp Basic fluctuation pattern

Claims (7)

Blowing fluctuation rate ratio or blowing fluctuation period between the blowing air from the upper vent outlet and the blowing air from the front vent outlet having a larger ventilation cross-sectional area than the ventilation sectional area of the upper vent outlet Is a vehicle air conditioner having an air outlet fluctuation mechanism that can be adjusted by changing the door opening degree, and a control unit that performs fluctuation drive control of the door opening degree by the air outlet fluctuation mechanism,
In the control unit, the air flow rate or temperature from the upper vent air outlet is higher than the air flow rate or temperature from the front vent air outlet so as to reduce the thermal load fluctuation of the entire vehicle interior temperature. An air conditioner for a vehicle. 2. The vehicle according to claim 1, wherein a front vent duct ventilation cross-sectional area for blowing air to the front vent outlet is set to be larger than a ventilation cross-sectional area of the upper vent outlet. Air conditioner. The control unit includes a vehicle thermal load calculation means for calculating the high and low of the vehicle thermal load by a connected thermal load sensor, and the vehicle thermal load calculated by the vehicle thermal load calculation means. A plurality of corresponding fluctuation control pattern maps are stored, and the fluctuation amount is changed stepwise according to the vehicle heat load level when the door opening degree fluctuation mechanism is controlled by the outlet fluctuation mechanism. The vehicle air conditioner according to claim 1 or 2, further comprising a fluctuation control pattern map storage means. The fluctuation control pattern map storage means stores a fluctuation control stop pattern for turning off the control based on the fluctuation control pattern map according to the amount of solar radiation and the outside air temperature when the blowing air blows out from the foot outlet. The vehicle air conditioner according to claim 3, wherein: In the fluctuation control pattern map, a plurality of different door opening change amounts and door opening times in the basic fluctuation pattern calculated and stored in accordance with the thermal load are sequentially replaced and rearranged in the time chart. The vehicle air conditioner according to claim 3 or 4, wherein the door opening degree is changed based on a fluctuation cycle. 6. The vehicle air conditioner according to claim 5, wherein a fluctuation stop time for stopping fluctuation drive control is provided by turning off the control based on the fluctuation control pattern map during the fluctuation cycle of the time chart. . It has an upper vent door opening / closing control mechanism that can adjust the opening degree of the upper vent blowing switching door provided at the upper vent outlet, and the upper vent door opening / closing control mechanism has different time required for opening and closing the door. The vehicle air conditioner according to any one of claims 1 to 6.

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