JP4821682B2 - In-vehicle heating element cooling device - Google Patents

Description

  The present invention relates to a cooling device for an in-vehicle heating element that cools a device that generates heat by being mounted on a vehicle.

  Conventionally, as a cooling device for this type of vehicle-mounted heating element, for example, a device described in Patent Document 1 is known. This on-vehicle heating element cooling device is a cooling device that adjusts the temperature of a secondary battery for driving a hybrid vehicle, and switches the air supplied for cooling the battery by appropriately selecting from several air supply sources. is there.

The battery cooling device includes a battery fan for supplying air to the battery, air introduced from the upper back of the cabin, air introduced from the rear air conditioner unit, and air introduced from the trunk room. Is provided with a switching damper for supplying the battery to the battery by a battery fan, and a temperature sensor for detecting the temperature of the battery. Furthermore, the battery cooling device includes a battery ECU that controls the switching damper and the battery fan based on the battery temperature, cabin temperature, trunk room temperature, and the like, and an air conditioner ECU that controls the operation of the rear air conditioner unit based on a signal from the battery ECU. And.
JP 2005-254974 A

  In recent automobiles, high comfort in the vehicle is demanded, and there is a tendency that high aural comfort is required. For this reason, in the apparatus described in Patent Document 1, the air introduction path that is introduced to air-cool the heating element may be switched to another introduction path, and the ventilation resistance changes at this time. There is a problem that the noise in the vehicle changes due to the change in the ventilation resistance, and the passenger feels uncomfortable and the comfort in the vehicle is impaired.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an in-vehicle heating element cooling device that can suppress a change in noise felt by an occupant when the air introduction path is changed.

In order to achieve the above object, the present invention employs the following technical means. That is, the invention of claim 1 relating to a cooling device for an in-vehicle heating element includes a blowing means (26) for supplying cooling air to a heating element (1) mounted on a vehicle and generating heat, and a blowing means (26). ) At least two introduction paths (27, 28, 29) provided as paths for introducing cooling air, path changing means (30, 31) for changing the introduction path for introducing cooling air, and the degree of noise in the vehicle A noise level detecting means (50) for detecting a physical quantity representing the amount and a control means for controlling the change of the introduction route by the route changing means (30, 31) based on the physical quantity detected by the noise level detecting means (50). 41, 42), and
The control means (41, 42) is configured to control the output of the blower means (26), and when the physical quantity detected by the noise level detection means (50) is equal to or greater than a predetermined value, the blower means (26 ) To reduce the output of the introduction path, and when the heating element (1) is at a predetermined high temperature or higher, the output of the blowing means (26) is reduced before the change of the introduction path. It is characterized by not performing control for executing the change .

According to the present invention, when the physical quantity representing the degree of noise in the vehicle is equal to or greater than a predetermined value, the change in the sound quality and the noise level due to the change in the ventilation resistance at the time of the change in the introduction route is performed by changing the introduction route. The noise is drowned out by a noise of a predetermined value or more transmitted to the passenger, making it difficult for the occupant to feel, and the noise change when changing the introduction route felt by the occupant can be suppressed. Therefore, since it becomes difficult for the occupant to feel the noise change, it is possible to provide a cooling device for an in-vehicle heating element that does not impair the comfort in the vehicle. In addition, by changing the introduction path after reducing the output of the blower means, the volume of cooling air flowing through the introduction path is reduced, so that the sound quality change and level change of noise caused by the change in ventilation resistance are made smaller. can do. Therefore, it is possible to further suppress the change in noise felt by the occupant. In addition, when the heating element is in a high temperature state, priority is given to securing the ability to cool the heating element, so that the in-vehicle heating element that does not impair the comfort in the vehicle while suppressing the reduction of the cooling capacity in the event of an abnormality, etc. A cooling device can be provided.

According to a second aspect of the present invention, in the invention according to the first aspect, when the physical quantity detected by the noise level detecting means (50) is equal to or greater than a predetermined value , the control means (41, 42) outputs the output of the blower means (26). and executes a change of introduction path from sending a signal to stop.

  According to the present invention, by temporarily stopping the cooling air flowing through the introduction path, it is possible to eliminate the change in the sound quality and the level of the noise caused by the change in the ventilation resistance, thereby further suppressing the change in the noise felt by the occupant. Can do.

According to a third aspect of the present invention, in the invention according to the first or second aspect, the control means (41, 42) reduces the output of the blower means (26) and then changes the introduction route, and then the blower means (26 ) and executes a process of increasing the output of. According to the present invention, after performing the control to suppress the change in noise felt by the occupant when the introduction route is changed, the reduction of the cooling capacity is suppressed by performing the process of recovering the ability to cool the heating element. In addition, it is possible to provide a cooling device for a vehicle-mounted heating element that does not impair the comfort in the vehicle.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the physical quantity detected by the noise level detecting means (50) blows conditioned air into the vehicle speed, the engine output amount, and the vehicle interior. Any one of the output amounts of the air-conditioning blower (8) is employed . According to the present invention, it is possible to prevent a passenger from being concerned about a change in sound quality or a level of noise by using noise, engine sound, and blowing sound during road running.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the path changing means (30, 31) is a path for adjusting an opening degree of a passage forming the introduction path (27, 28, 29). The change doors (30, 31) are configured, and the control means (41) controls the actuators (30a, 31a) that drive the route change doors (30, 31) to control the air direction of the vehicle to guide the wind direction. It is performed through an actuator (22a) that drives a door (22) mounted on the device (5) .

  According to the present invention, the door driving actuator and the path changing door driving actuator of the vehicle air conditioner are controlled by the same control means, so that the configuration and specifications for the control can be simplified, and the mountability and cost are reduced. Can provide an excellent device. Moreover, the same actuator as the actuator that drives the door of the vehicle air conditioner can be used as the actuator that drives the path changing door.

  The reference numerals in parentheses of the above means are an example showing the correspondence with the specific means described in the embodiments described later.

(First embodiment)
In the first embodiment, a battery pack, which is an example of a cooling device for an in-vehicle heating element, is used in a hybrid vehicle that uses an internal combustion engine and a battery drive motor as a travel drive source, and serves as a drive power source for the travel motor. A battery cooling device for cooling will be described. As a vehicle-mounted heating element to be cooled, there is a DC / DC converter in addition to a battery pack, and the configuration of the battery cooling device of this embodiment can also be applied to a cooling device that air-cools the DC / DC converter.

  The battery pack is, for example, a nickel metal hydride secondary battery, a lithium ion secondary battery, or an organic radical battery. The battery pack is housed in a case and is placed under the floor of the trunk room, under the seat of the automobile, between the rear seat and the trunk room. It is installed in the space, the space between the driver's seat and the passenger seat. The DC / DC converter converts a high voltage of a main battery for a power source of a hybrid vehicle into a low voltage, charges an auxiliary battery (for example, 12V), and operates a light, a wiper, a horn and the like.

  This embodiment will be described with reference to FIGS. FIG. 1 is a schematic side view of a vehicle showing a state in which the battery cooling device and the air conditioner according to the present embodiment are mounted on the vehicle. FIG. 2 is a schematic cross-sectional view showing the configuration of the rear seat air conditioning unit 5 and the battery cooling device.

  As shown in FIG. 1, the rear seat side air conditioning unit 5 is mounted in the trunk room 3. The rear seat side air conditioning unit 5 is disposed at a position directly below the rear tray 4. The trunk room 3 is formed behind the rear seat 2 and below the rear tray 4.

  The rear seat side air conditioning unit 5 includes a ventilation path through which air flows into the vehicle interior inside a resin air conditioning case 5a. An inside air suction port 6 is provided on one end side of the ventilation path in the air conditioning case 5a. The inside air suction port 6 is disposed in the upper part of the air conditioning case 5a and passes through the rear tray 4 and opens to a rear seat side region in the vehicle. The inside air suction port 6 is an opening that takes in the vehicle interior air (inside air) from the rear seat side region in the vehicle and guides it into the air conditioning case 5a.

  In the ventilation path in the air conditioning case 5 a, an air purification filter 7 is disposed on the leeward side of the inside air suction port 6, and a rear seat side blower 8 is disposed on the leeward side of the air purification filter 7. The air purification filter 7 performs a dust removal function and a deodorization function. The rear seat side blower 8 has a configuration in which a centrifugal blower fan 8a is rotationally driven by a motor 8b.

  In the ventilation path in the air conditioning case 5a, a rear seat side evaporator 9 which is a heat exchanger for cooling is arranged on the outlet side of the rear seat side blower 8. The rear seat side evaporator 9 is provided in a refrigerant passage branched from the refrigeration cycle 11 of the front seat side air conditioning unit 10. The refrigeration cycle 11 includes a closed circuit including a compressor 12, a condenser 13 that forms a radiator for a high-pressure side refrigerant, a front seat side expansion valve 14, a front seat side evaporator 15 and the like. The compressor 12 is composed of an electric compressor that is rotationally driven by a motor.

  The front seat air conditioning unit 10 is disposed in the front part of the vehicle and air-conditions the front seat side region in the vehicle. The front seat side air conditioning unit 10 sucks the inside air or the outside air by a front seat side blower (not shown) and air-conditions it in the air conditioning case 17. A front seat evaporator 15 that is a heat exchanger for cooling is disposed on the outlet side of the front seat side blower in the ventilation path in the air conditioning case 17, and heating heat exchange is performed on the lee side of the front seat side evaporator 15. A front seat side heater core (not shown), which is a container, is arranged. The air volume ratio between the warm air passing through the front seat side heater core and the cool air bypassing the front seat side heater core is adjusted by a front seat side air mix door (not shown) to adjust the temperature of the blown air on the front seat side in the vehicle is doing.

  The conditioned air after temperature adjustment is blown out from the face blower outlet, foot blower outlet and defroster blower outlet, or a plurality of blower outlets to the front seat in the vehicle or to the front window glass side by a blower outlet switching mechanism (not shown). Is done.

  A rear seat side expansion valve 20 is connected to the refrigerant inlet side of the rear seat side evaporator 9. The rear seat side expansion valve 20 and the rear seat side evaporator 9 are connected in parallel with the front seat side expansion valve 14 and the front seat side evaporator 15. The front seat expansion valve 14 and the rear seat expansion valve 20 adjust the valve opening so that the degree of superheat of the outlet refrigerant of the front seat evaporator 15 and the rear seat evaporator 9 becomes a predetermined value, respectively.

  A rear seat side heater core 21, which is a heat exchanger for heating, is disposed on the leeward side of the rear seat side evaporator 9 in the ventilation path in the air conditioning case 5 a of the rear seat side air conditioning unit 5. The rear seat-side air mix door 22 adjusts the air volume ratio between the warm air passing through the rear seat-side heater core 21 and the cool air bypassing the rear-seat-side heater core 21 to adjust the temperature of the in-vehicle rear seat-side blown air. The rear seat side heater core 21 and the front seat side heater core heat the air using engine coolant (hot water) of the vehicle as a heat source.

  On the leeward side of the rear seat side heater core 21, there are a rear seat side blowing mode switching door 23, a rear seat side face opening 24 and a rear seat side foot opening 25 which are opened and closed by the rear seat side blowing mode switching door 23. Is provided. A rear seat side ceiling outlet duct 24 a is connected to the rear seat side face opening 24, and a rear seat side foot outlet duct (not shown) is connected to the rear seat side foot opening 25.

  With this configuration, when the rear seat side is cooled, the rear seat side face opening 24 is opened, so that the cold air whose temperature is adjusted by the rear seat side air mix door 22 is changed from the rear seat side face opening 24 to the rear seat side. It flows through the ceiling outlet duct 24a and is blown out from the rear seat side ceiling outlet 24b toward the head of the rear seat occupant.

  When the rear seat side is heated, the rear seat side foot opening 25 is opened, so that the warm air whose temperature is adjusted by the rear seat side air mix door 22 flows from the rear seat side foot opening 25 to the rear seat side foot outlet duct. It flows inside and is blown out toward the foot of the rear seat occupant.

  The battery cooling device disposed in the lower floor of the trunk room 3 mainly includes a battery pack 1 that is an assembly of battery modules and a cooling blower 26 that supplies air to cool the battery pack 1. The battery pack 1 is configured by arranging a plurality of electrically connected battery modules in parallel with their longitudinal side surfaces facing each other and integrating them, and is housed in a storage case 34. Yes.

  The cooling blower 26 includes a centrifugal blower fan 26 a that is rotationally driven by a motor 26 b and is housed in a blower case 32. The blower case 32 is a casing having a scroll casing and having a chamber on the windward side of the centrifugal blower fan 26a. The centrifugal blower fan 26a is a sirocco fan having forward-facing blades. In addition to a sirocco fan, a radial fan having a radially-oriented blade can be used to blow air with high static pressure, low air volume and low noise, similar to the sirocco fan. The member can be configured.

  On the suction side of the cooling blower 26, at least two introduction passages provided as paths for guiding cooling air for cooling the battery pack 1 are provided and connected to the blower case 32. In the present embodiment, an example in which three introduction passages are connected to the suction side of the cooling blower 26 is shown. The three introduction passages include an inside air introduction passage 27 through which air inside the vehicle (inside air) flows, a cold air introduction passage 28 through which air cooled by the rear seat side evaporator 9 flows, and air outside the vehicle (outside air). This is the outside air introduction passage 29 that flows.

  The blowout side of the cooling blower 26 communicates with the air inlet portion of the storage case 34 through a connecting duct 33 that connects the storage case 34 and the blower case 32. The air outlet portion of the storage case 34 is connected to a duct that branches into a return passage 35 to the inside of the vehicle and a discharge passage 36 to the outside of the vehicle. The reflux passage 35 is a passage that communicates with the inside of the vehicle and flows after the battery is cooled and flows back into the vehicle as indicated by an arrow a in FIG. The downstream end of the discharge passage 36 opens directly to the outside of the vehicle.

  The inside air introduction passage 27 is connected to the upstream side of the rear seat side blower 8 on the downstream side of the inside air suction port 6 of the rear seat side air conditioning unit 5. The cold air introduction passage 28 is connected to a portion of the rear seat side evaporator 9 immediately after leeward. The outside air introduction passage 29 opens into the trunk room 3. The inside of the trunk room 3 communicates with the outside air through a minute gap formed by a lid portion of the trunk, and the inside of the trunk room 3 has an atmosphere similar to the outside air. For this reason, air suction from the outside air introduction passage 29 can be regarded as outside air suction.

  In the blower case 32, two introduction passage switching doors 30 and 31 capable of opening and closing three openings of introduction passages 27, 28 and 29 formed on the blower case 32 side are arranged. The introduction passage switching doors 30 and 31 are route change doors that can change the introduction route through which the air that cools the battery pack 1 flows, and are configured to be linked by a link mechanism (not shown). FIG. 2 shows a state in which the inside air introduction passage 27 and the outside air introduction passage 29 are closed by the introduction passage switching doors 30 and 31, and only the cold air introduction passage 28 is opened. In this state, the cold air intake mode is set. State.

  In addition to the cold air intake mode, the introduction passage switching doors 30 and 31 close the inside air introduction passage 27 and the cold air introduction passage 28 to open the outside air introduction passage 29, and the cold air introduction passage 28 and the outside air introduction passage 29. Can be switched between an internal air intake mode in which the internal air introduction passage 27 is opened and the cold air introduction passage 28 is closed and both the internal air introduction passage 27 and the external air introduction passage 29 are simultaneously opened. Can be set.

  In FIG. 1, the rear seat side heater core 21, the rear seat side air mix door 22, the rear seat side blowing mode switching door 23, the rear seat side foot opening 25, the introduction passage switching doors 30 and 31, etc. The illustration is omitted.

  Next, the outline | summary of the control means in the battery cooling device of this embodiment and an air conditioner is demonstrated using FIG. FIG. 3 is a block diagram showing a configuration for controlling the battery cooling device and the rear seat air conditioning unit 5. The hybrid vehicle control device 42 (hereinafter referred to as the HV control device 42) communicates control signals bidirectionally with each of the engine control device 40 and the air conditioner control device 41 for controlling the driving of the engine and controls both control devices. Control the hybrid system. The battery cooling device and the control unit of the air conditioner according to the present embodiment are configured by the HV control device 42 and the air conditioner control device 41.

  The air conditioner control device 41 receives signals from an air conditioning sensor group (not shown) and an air conditioning operation panel (not shown). The air conditioning sensor group includes an outside air temperature sensor, an inside air temperature sensor, a solar radiation sensor, an evaporator temperature sensor, an engine coolant temperature sensor, and the like. The air conditioning operation panel is provided with various operation switches for setting the temperature of the passenger compartment temperature, switching the air volume, switching the blowing mode, switching the inside / outside air suction mode, operating the compressor 12, and the like.

  The air conditioner control device 41 includes a drive motor for the compressor 12, a drive motor for the front seat side blower, a servo motor that is an actuator for the front seat side air mix door, a motor 8b for the rear seat side blower 8, and a rear seat side air mix. Control signals are output to the servo motor 22a, which is an actuator of the door 22, the servo motor 23a, which is an actuator of the rear seat side blowing mode switching door 23, and the like, and the operation of each functional product for air conditioning is controlled.

  The HV controller 42 receives a detection signal from a temperature sensor (not shown) that detects the temperature of the battery pack 1 and a detection signal from the vehicle speed detection unit 50 that detects the vehicle speed. The vehicle speed detection unit 50 detects a vehicle speed that is an example of a physical quantity that represents the degree of noise in the vehicle. The HV control device 42 controls the terminal voltage of the motor 26b of the cooling blower 26 to control the rotation speed of the motor 26b, that is, the air volume of the cooling blower 26, and also controls the operating angles of the servo motors 30a and 31a. The opening and closing of the introduction passage switching doors 30 and 31 is controlled.

  The HV control device 42 performs PWM control for modulating the motor 26b by changing, for example, the duty ratio of a voltage pulse wave. PWM control is a method of driving a motor with pulses of a constant cycle, and the motor voltage is controlled by changing the duty ratio of the pulse (the value obtained by dividing the motor ON time by the total time of the ON time and the OFF time). . The HV controller 42 controls the surface temperature of the battery pack 1 by variably controlling the rotational speed of the centrifugal blower fan 26a according to the target cooling capacity by PWM control.

  The HV control device 42 opens and closes the blower case side opening of the inside air introduction passage 27 by controlling the actuator of the introduction passage switching door 30, and controls the cold air introduction passage 28 and the outside air by controlling the actuator of the introduction passage switching door 31. The blower case side openings of the introduction passages 29 are respectively opened and closed. The HV control device 42 controls the actuators of the introduction passage switching doors 30 and 31 to a predetermined opening so that the cold air intake mode, the external air intake mode, the internal air intake mode, and the internal / external air simultaneous intake mode can be switched freely. Thus, the introduction path through which the cooling air for cooling the battery pack 1 is introduced can be changed.

  Next, an outline of the operation of the front seat air conditioning unit 10 and the rear seat air conditioning unit 5 will be described. The front seat side air conditioning unit 10 sucks the inside air or the outside air by the operation of the front seat side blower, blows the air toward the front seat side evaporator 15, and is cooled by the front seat side evaporator 15. Here, the cooling capacity of the front seat side evaporator 15 is adjusted by adjusting the rotational speed of the compressor 12 and adjusting the refrigerant flow rate. Therefore, the cold air temperature on the outlet side of the front seat evaporator 15 can be controlled by adjusting the rotational speed of the compressor 12.

  The cold air after passing through the front seat side evaporator 15 is branched into the front seat side heater core side and the bypass passage side of the front seat side heater core by the front seat side air mix door. Therefore, the front-seat-side air conditioning unit 10 adjusts the opening degree of the front-seat-side air mix door to adjust the air volume ratio between the warm air passing through the front-seat-side heater core and the cold air bypassing the front-seat-side heater core 18. It is possible to adjust and control the temperature of the air blown to the front seat side in the vehicle.

  The rear seat side air conditioning unit 5 sucks the inside air from the inside air suction port 6 by the operation of the rear seat side blower 8 and blows it toward the air purification filter 7, and performs dust removal and deodorization by the air purification filter 7. The blown air is blown toward the rear seat side evaporator 9 and cooled by the rear seat side evaporator 9.

  The cool air after passing through the rear seat side evaporator 9 is branched by the rear seat side air mix door 22 into the rear seat side heater core 21 side and the bypass passage side of the rear seat side heater core 21. The rear seat air conditioning unit 5 adjusts the air flow rate ratio between the warm air passing through the rear seat heater core 21 and the cool air bypassing the rear seat heater core 21 by adjusting the opening degree of the rear seat air mix door 22. The temperature of the air blown to the rear seat side in the vehicle can be adjusted.

  Next, battery cooling control according to the present embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a flowchart showing an example of a battery cooling control processing procedure in the present embodiment. FIG. 5 is a chart showing the relationship between the change of the cooling air introduction path and the output of the cooling blower 26.

  When an operation start signal for the hybrid vehicle is generated, a battery cooling control process is started. FIG. 4 exemplifies the control processing procedure for battery cooling from the state of the inside air intake mode, and shows the control related to the change of the cooling air introduction path. First, the HV control device 42 detects the temperature of the battery pack 1 using a temperature sensor, and determines whether or not the temperature of the battery pack 1 is in a high temperature state (S1). The high temperature state is a state that immediately leads to deterioration of the battery pack 1 and requires quick cooling, and the HV control device 42 has received a detection signal from the temperature sensor that the temperature of the battery surface is equal to or higher than a predetermined high temperature T1 ° C. Is the time.

  When the detected temperature of the temperature sensor is lower than T1, it is determined whether or not the detected temperature is equal to or lower than a predetermined value T2 ° C. that is lower than T1 (S2). This T2 ° C. is a temperature at which the battery pack 1 does not deteriorate immediately, but if the state is left as it is, it is a temperature that leads to deterioration, and shows a state in which it is necessary to increase the amount of cooling air supplied by the cooling blower 26 and supply it. Yes. If it is determined in S2 that it is T2 or less, the HV control device 42 sends a control signal for reducing the duty ratio of the voltage to the motor 26b so as to reduce the current air volume by the cooling blower 26, and lowers the blower level (S3). Next, the determination process of S1 is performed. The control signal for lowering the voltage duty ratio is sent stepwise with a predetermined reduction width, and the air volume decreases stepwise.

  On the other hand, if it is determined in S2 that the predetermined value T2 has been exceeded, the HV control device 42 sends a control signal for increasing the duty ratio of the voltage so as to increase the current air volume by the cooling blower 26 to the motor 26b. (S4). The control signal for increasing the voltage duty ratio is sent stepwise with a predetermined increase width, and the air volume increases stepwise. Next, it is determined whether or not the blower level of the cooling blower 26 is less than a predetermined upper limit value (S5). This predetermined upper limit is a value determined from the balance between the air volume of the air conditioned air into the vehicle by the air conditioner and the air volume of the cooling air to the battery pack 1, and the air volume of the cooling air is too large. Is an upper limit value that is set so as not to decrease too much and noise in the vehicle does not increase excessively, so that it is not necessary to increase the cooling air flow.

  If the determination in S5 is less than the predetermined upper limit value, the HV control device 42 sends a control signal for increasing the duty ratio of the voltage to the motor 26b so as to increase the current air volume by the cooling blower 26 to increase the blower level. (S6) Next, the determination process of S1 is performed.

  On the other hand, if it is determined in S5 that the vehicle speed is greater than or equal to the predetermined upper limit value, the HV control device 42 determines whether or not the vehicle speed detected by the vehicle speed detection unit 50 that next detects the noise level in the vehicle is greater than or equal to the predetermined value SP1. Is determined (S7).

  The vehicle speed detected by the vehicle speed detection unit 50 is an example of a physical quantity indicating the degree of noise in the vehicle. Other physical quantities include an engine output amount such as the engine speed and the output of an air conditioning blower that blows conditioned air into the vehicle. It is possible to employ the power (rotation speed, supply voltage value, supply current value, when changing the air conditioner from stop to operation), and the like.

  When the vehicle speed is the physical quantity, road noise during driving of the vehicle mainly represents the degree of noise in the vehicle. When the engine output amount is the physical quantity, the noise generated from the engine mainly represents the degree of noise in the vehicle, and the engine control device 40 serves as noise level detection means. In this case, the predetermined value is E1. When the output amount of the air conditioner blower is the physical quantity, the air blowing sound of the air conditioner mainly represents the degree of noise in the vehicle, and the air conditioner control device 41 serves as a noise level detection means. In this case, the predetermined value is Q1. It is. E1 and Q1 can be replaced with the predetermined value SP1 of S7.

  If the determination is less than the predetermined value SP1 in S7, the HV control device 42 maintains the cooling air introduction path and continues the inside air intake mode because it is not the timing to change the cooling air introduction path (S8). The determination in S7 is repeated until the vehicle speed becomes equal to or higher than the predetermined value SP1.

  On the other hand, if it is determined in S7 that the value is equal to or greater than the predetermined value SP1, the HV control device 42 regards it as the timing to change the cooling air introduction path, and first reduces the current air volume by the cooling blower 26. Then, a control signal for lowering the voltage duty ratio is sent to the motor 26b to lower the blower level (S9). The HV controller 42 thus reduces the output of the cooling blower 26 in the process of S9, and then sends a control signal to the servo motor 30a to open the introduction path switching door 30 to the blower case side opening of the inside air introduction path 27. The cooling air introduction mode is changed by switching to the cold air intake mode, and the cold air cooled by the rear seat side evaporator 9 is introduced through the cold air introduction passage 28 (S10).

  In this way, by executing the control to change the cooling air introduction path when the degree of noise in the vehicle is equal to or higher than a predetermined value, the change in the sound quality and level of the noise caused by the change in the ventilation resistance at the time of the introduction path change, etc. It is possible to detect a situation that is difficult for the passenger to hear. Therefore, by changing the introduction route in this situation, it is possible to prevent the passengers from feeling uncomfortable noise during the introduction route change that has actually occurred, Efficient control that can also perform cooling of the battery whose temperature exceeds the predetermined value T2 is obtained.

  Further, since the HV control device 42 reduces the output of the cooling blower 26 in S9 and then changes the introduction path, the amount of cooling air flowing through the introduction path is reduced, so that the ventilation resistance when the introduction path is changed is reduced. The sound quality change and level change of the noise caused by the change can be further reduced, and the change in the noise felt by the occupant can be further suppressed to suppress discomfort.

  Further, the HV control device 42 sends a control signal for reducing the output of the cooling blower 26 to an allowable minimum output necessary for cooling the battery pack 1 in S9, and then changes the introduction path in S10. Good. Further, the HV control device 42 may send a signal for stopping the output of the cooling blower 26 in S9, and then change the introduction path in S10. When this control is used, the cooling air flowing through the introduction route is temporarily stopped, so that the sound quality change and level change caused by the change in ventilation resistance when the introduction route is changed are further reduced. It is possible to further suppress discomfort by further suppressing the change.

  Next, the HV control device 42 sends a control signal for increasing the duty ratio of the voltage to the motor 26b so as to increase the current air volume by the cooling blower 26, thereby raising the blower level (S11). By this process, after the introduction route is changed, the ability to cool the battery pack 1 is recovered, so that it is possible to provide an apparatus that suppresses the discomfort of the occupant and suppresses the decrease in cooling capacity.

  Next, the HV control device 42 determines whether or not the temperature of the battery surface detected by the temperature sensor is equal to or lower than a predetermined value T2 ° C. as in the process in S2 (S12). If it is determined in S12 that the temperature of the battery surface detected by the temperature sensor exceeds T2, the HV control device 42 needs to continue providing the cool air to the battery pack 1, so The introduction path is maintained and the cold air intake mode is continued (S13). The determination in S12 is repeated until the temperature of the battery surface becomes a predetermined value T2 ° C. or less.

  On the other hand, if the HV control device 42 determines in S12 that the temperature is equal to or lower than the predetermined value T2 ° C., it is not necessary to cool the battery pack 1 with cold air, and the introduction passage is the inside air introduction passage 27, the outside air introduction passage 29, The timing of changing to either one of the two introduction passages 27 and 29 is awaited. Next, it is determined whether or not the vehicle speed detected by the vehicle speed detection unit 50 that detects the in-vehicle noise level is equal to or higher than the predetermined value SP1 as in the process in S7 (S14). When it is determined in S14 that the vehicle speed is smaller than the predetermined value SP1, the HV control device 42 considers that it is not yet the timing to change the introduction route, performs the process of S13 and continues the cold air intake mode, and then proceeds to the process of S12. Return.

  If it is determined in S14 that the vehicle speed is equal to or higher than the predetermined value SP1, the HV control device 42 considers that the interior of the vehicle is at a noise level higher than a certain level and it is time to change the introduction route, and the cooling is performed in the same manner as S9 described above. After the process of reducing the output of the blower 26 is performed (S15), a control signal is sent to the servo motor 30a to cause the introduction path switching door 30 to operate so as to close the opening on the blower case side of the cold air introduction path 28 to take in the inside air. The mode is switched to change the cooling air introduction path (S16).

  Further, the HV control device 42 sends a control signal for increasing the duty ratio of the voltage to the motor 26b so as to increase the current air volume by the cooling blower 26, and raises the blower level in the same manner as in the process of S11 (S17). , The process returns to S1.

  When the HV controller 42 determines that the temperature detected by the temperature sensor is equal to or higher than the predetermined high temperature T1 in the process of S1, it is necessary to immediately cool the battery, giving priority to the cooling of the battery, and the cooling blower 26 The control for executing the change of the introduction route after the output is reduced is not performed. In this case, the HV control device 42 sends a control signal to the servo motor 30a to operate the introduction path switching door 30 so as to close the blower case side opening of the inside air introduction passage 27 to switch from the inside air intake mode to the outside air intake mode, The introduction path of the cooling air is changed (S18). After the process of S18, the process jumps to the process of S12.

  When this priority is given to the battery cooling control, it is possible to secure the ability to cool the battery at the time of abnormality or the like to suppress the reduction of the cooling ability of the apparatus and to ensure the comfort in the vehicle.

  As in the control processing procedure shown in FIG. 4 described above, a series of control is performed in which the cooling air introduction path is switched from the inside air introduction path 27 to the cold air introduction path 28 and further switched from the cold air introduction path 28 to the inside air introduction path 27. The relationship between the change of the cooling air introduction path and the output of the cooling blower 26 will be described with reference to FIG.

  First, when the suction passage of the cooling blower 26 is the inside air introduction passage 27, the HV control device 42 controls the output of the cooling blower 26 to L1. After that, the output of the cooling blower 26 is reduced from L1 to L2 before changing the suction route, and then further reduced to L3 (relationship of L1> L2> L3). The HV controller 42 controls the output of the cooling blower 26 at L3 until the timing C1 for changing the intake path from the inside air introduction passage 27 to the cold air introduction passage 28 is reached. When switching to the mode, it is increased to L2.

  While in the cold air intake mode, the output of the cooling blower 26 is controlled to be fixed at L2. Further, the HV control device 42 linearly reduces the output of the cooling blower 26 from L2 to L3 before changing from the cold air intake mode to the internal air intake mode, and the intake path is changed from the cold air introduction passage 28 to the internal air introduction passage 27. When the timing C2 to be changed arrives, control is performed with L3 fixed for a predetermined time, and then increased step by step in order of L2 and L1. Then, when the output of the cooling blower 26 reaches L1, the HV control device 42 controls the HV control device 42 at L1 during the inside air intake mode.

  The cooling blower output 26 is controlled so as to change linearly (linear function) with the passage of time when it changes between L1, L2 and L3 by modulating the duty ratio of the voltage.

  As described above, the on-vehicle heating element cooling device of the present embodiment is mounted on the battery pack 1 by the cooling blower 26 that supplies air for cooling the battery pack 1 that is mounted on the vehicle and generates heat, and the cooling blower 26. The inside air introduction passage 27, the cold air introduction passage 28 and the outside air introduction passage 29 provided as a route for guiding the supplied air, the introduction passage switching doors 30 and 31 for changing the route for guiding the air, and the level of noise in the vehicle. A vehicle speed detection unit 50 that detects a vehicle speed that is a physical quantity to be represented, and an HV control device 42 that controls a change in the introduction path by the introduction passage switching doors 30 and 31 based on the physical quantity detected by the vehicle speed detection unit 50. Yes. The HV control device 42 executes control to change the air introduction path when the physical quantity detected by the vehicle speed detection unit 50 is equal to or greater than a predetermined value.

  According to this control, the change in noise quality and level due to the change in ventilation resistance at the time of introduction route change is extinguished by the noise transmitted to the interior of the vehicle above a certain level, making it difficult for passengers to perceive changes in the sound quality and level of the noise. The discomfort felt by the occupant can be suppressed.

(Second Embodiment)
2nd Embodiment differs in the structure (path | route of a control signal) which controls each actuator of the introduction passage switching doors 30 and 31 with respect to the cooling device of the vehicle-mounted heat generating body of 1st Embodiment. The other components are the same as those in the first embodiment, and the configuration and operational effects are the same as described above. Hereinafter, differences from FIG. 3 of the first embodiment will be described with reference to FIG. FIG. 6 is a block diagram showing an outline of control means in the battery cooling device and the air conditioner of the present embodiment.

  As shown in FIG. 6, the HV control device 42 controls the hybrid system while communicating the control signals bidirectionally with the engine control device 40 and the air conditioner control device 41 to control both control devices. The air conditioner control device 41 receives signals from an air conditioning sensor group (not shown) and an air conditioning operation panel (not shown), and detects a vehicle speed that is an example of a physical quantity indicating the degree of noise in the vehicle. 50 detection signals are input.

  The air conditioner control device 41 includes a motor for driving the compressor 12, a motor for driving the front seat side blower, a servo motor for the front seat side air mix door, a motor 8 b for the rear seat side blower 8, and a rear seat side air mix door 22. Control signals are output to the servo motor 22a, the servo motor 23a of the rear seat side blowing mode switching door 23, and the like, and the operation of each functional product for air conditioning is controlled. Further, the air conditioner control device 41 sends control signals to the servo motors 22a and 23a, and controls the operating angles of the servo motors 30a and 31a via the servo motors 22a and 23a to open and close the introduction passage switching doors 30 and 31. Control. The HV control device 42 controls the terminal voltage of the motor 26b of the cooling blower 26 to control the rotation speed of the motor 26b, that is, the air volume of the cooling blower 26.

  With the above configuration, the air conditioner control device 41 opens and closes the opening of the inside air introduction passage 27 by controlling the actuator of the introduction passage switching door 30, and controls the cold air introduction passage 28 and the actuator of the introduction passage switching door 31. The blower case 32 side opening of the outside air introduction passage 29 is opened and closed. The air conditioner control device 41 controls each actuator of the introduction passage switching doors 30 and 31 to a predetermined opening so that the cold air intake mode, the outside air intake mode, the inside air intake mode, and the inside and outside air simultaneous intake mode can be switched freely. Thus, the introduction path through which the cooling air for cooling the battery pack 1 is introduced can be changed.

  As described above, in the on-vehicle heating element cooling device of the present embodiment, the opening degree of the introduction passage switching doors 30 and 31 is controlled by controlling the operation of the servo motors 30a and 31a as actuators. The control device 41 executes drive control of the servo motors 30a and 31a via the servo motor 22a that drives the air mix door 22 and the like mounted on the rear seat air conditioning unit 5.

  According to this configuration, since the control of the actuators such as the air mix door 22 mounted on the rear seat side air conditioning unit 5 and the actuators of the introduction passage switching doors 30 and 31 is performed by the air conditioner control device 41 which is the same control means. It is possible to simplify the configuration and control specifications necessary for control, and to provide a device that is excellent in mountability and cost. If the control signals sent from the control means are of the same type (for example, BUS communication), the actuator for driving the introduction passage switching doors 30 and 31 and the actuator such as the air mix door 22 are actuators of the same mechanism. Can be configured.

(Other embodiments)
In the above-described embodiment, the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. It is.

  For example, in the above embodiment, the cooling blower 26 is positioned downstream of the inside air introduction passage 27, the cold air introduction passage 28, and the outside air introduction passage 29, which are cooling air introduction paths, as shown in FIGS. However, the present invention is not limited to this, and it may be arranged to be located on the upstream side of each passage. That is, the air supplied to the battery pack 1 may be configured to be blown out to the respective passages in addition to the configuration of being sucked into the respective passages by the cooling blower 26.

  The cooling air introduction path is not limited to the inside air introduction path 27, the cold air introduction path 28, and the outside air introduction path 29, and has at least two passages and an introduction port. Any two of the cold air introduction passage 28 and the outside air introduction passage 29, or other passages may be provided in addition to the three passages.

  The cooling blower 26 is configured to blow cooling air to the battery pack 1, but is disposed downstream of the battery pack 1 and sucks cooling air from the battery pack 1. May be.

It is the schematic of the vehicle side surface which showed the state which mounted the battery cooling device and air conditioning apparatus in 1st Embodiment in the vehicle. It is the cross-sectional schematic which showed the structure of the backseat side air conditioning unit and battery cooling device in 1st Embodiment. It is the block diagram which showed the outline | summary of the control means in the battery cooling device and air conditioner of 1st Embodiment. It is the flowchart which showed an example of the control processing procedure of the battery cooling in 1st Embodiment. In 1st Embodiment, it is the chart which showed the relationship between the change of the introduction path | route of cooling air, and the output of a cooling blower. It is the block diagram which showed the outline | summary of the control means in the battery cooling device and air conditioning apparatus of 2nd Embodiment.

Explanation of symbols

1 ... Battery pack (heating element)
5. Rear seat air conditioning unit (vehicle air conditioner)
8 ... Rear seat side blower (air conditioner blower)
22 ... Air mix door (door)
22a ... Servo motor (actuator)
26 ... Cooling blower (air blowing means)
27. Inside air introduction passage (introduction route)
28 ... Cool air introduction passage (introduction route)
29 ... Outside air introduction passage (introduction route)
30, 31 ... Introduction passage switching door (route changing means, route changing door)
30a, 31a ... Servo motor (actuator)
41 ... Air conditioner control device (control means)
42 ... Hybrid vehicle control device (HV control device, control means)
50. Vehicle speed detection unit (noise level detection means)

Claims (5)

A blowing means (26) for supplying cooling air to a heating element (1) mounted on a vehicle and generating heat;
At least two introduction paths (27, 28, 29) provided as paths for guiding the cooling air by the blowing means (26);
Route changing means (30, 31) for changing the introduction route for introducing the cooling air;
Noise level detection means (50) for detecting a physical quantity representing the degree of noise in the vehicle;
Control means (41, 42) for controlling the change of the introduction route by the route change means (30, 31) based on the physical quantity detected by the noise level detection means (50),
The control means (41, 42) is configured to control the output of the air blowing means (26), and when the physical quantity detected by the noise level detection means (50) is a predetermined value or more, Control is performed to change the introduction path after reducing the output of the blower means (26), and when the heating element (1) is at a predetermined high temperature or higher, the output of the blower means (26). The vehicle-mounted heating element cooling device is characterized in that the control for changing the introduction path is not performed after the reduction of the temperature. The control means (41, 42) sends a signal for stopping the output of the blower means (26) when the physical quantity detected by the noise level detection means (50) is a predetermined value or more, and then introduces the control means (41, 42). The in-vehicle heating element cooling device according to claim 1 , wherein the route is changed. The control means (41, 42) executes a process of increasing the output of the blower means (26) after changing the introduction route after reducing the output of the blower means (26). The in-vehicle heating element cooling device according to claim 1 or 2 , characterized in that The physical quantity detected by the noise level detection means (50) is one of a vehicle speed, an engine output quantity, and an output quantity of an air conditioning blower (8) for blowing conditioned air into the vehicle. The in-vehicle heating element cooling device according to any one of claims 1 to 3 . The route changing means (30, 31) is constituted by a route changing door (30, 31) for adjusting the opening degree of the air passage forming the introduction route (27, 28, 29),
The control means (41) controls the actuators (30a, 31a) that drive the path changing doors (30, 31) and controls the doors (22) mounted on the vehicle air conditioner (5) to guide the wind direction. ) vehicle heating element cooling device according to claim 1, any one of 4, characterized in that run through the actuator for driving (22a) a.

Images