JP2006224872A - Vehicle air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle air-conditioner capable of measuring both an indoor temperature and a surrounding atmosphere temperature without requiring any additional surrounding atmosphere sensor. <P>SOLUTION: The vehicle air conditioner is provided an indoor air and surrounding atmosphere changing-over box 2 having a surrounding atmosphere intake port 29a and an indoor air intake port 26a and arranged at an upstream side of a blower 3, a surrounding atmosphere and indoor air detecting sensor 9 arranged inside the indoor air and surrounding atmosphere changing-over box 2 so as to detect a temperature of either indoor air or surrounding atmosphere, and an indoor air and surrounding atmosphere changing-over door 16 opened or closed within the indoor air or surrounding atmosphere intake changing-over box 2 to enable flowing-in of either surrounding atmosphere or indoor air to be adjusted. When a degree of opening of the indoor air or surrounding atmosphere changing-over door 16 is adjusted and both the surrounding atmosphere and indoor air are taken into the indoor air or surrounding atmosphere intake changing-over box 2, a temperature of the indoor air taken at the indoor air intake port 26a is detected by the surrounding atmosphere and indoor air detecting sensor 9 so as to control an indoor area of a vehicle 23 kept at a set temperature. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner that controls a vehicle interior so as to maintain a set temperature.

  In recent years, a vehicle air conditioner is generally equipped with an air conditioner system, and various sensors are used in an auto air conditioner in particular. This is an important function in air conditioning control. On the other hand, in recent years, there has been an increasing demand for inexpensive vehicle air conditioners, and it is important to reduce the number of these sensors while ensuring good occupant feeling.

Therefore, conventionally, as this type of vehicle air conditioner, a sensor is provided on the windward side of the evaporator in the refrigeration cycle, and the detected value of the sensor in the outside air mode is replaced with the outside air temperature to control the air conditioning. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 7-179119 (see FIG. 1)

  However, in the above conventional vehicle air conditioner, for the purpose of eliminating the outside air sensor, the detection value of the sensor provided on the wind of the evaporator is replaced with the outside air temperature to control the air conditioning, but the room temperature is detected. In addition to the sensor for detecting the temperature, the sensor for detecting the outside air temperature is required.

  Therefore, an object of the present invention is to provide a vehicle air conditioner that can measure both the indoor temperature and the outside air temperature without requiring a separate outside air sensor. .

In order to achieve the above object, the technical means described in claims 1 to 7 are employed. That is, the invention of the vehicle air conditioner according to claim 1 includes an outside air inlet (29a) that sucks outside air into the air conditioning duct (1), an inside air inlet (26a) that sucks inside air into the air conditioning duct, The air conditioning duct (1) is provided with an inside / outside air switching door (16, 16A) capable of adjusting the inside / outside air suction state by selecting the position of the outside air suction position for sucking outside air, the inside air and the inside / outside air suction position for sucking outside air. Inside / outside air intake switching box (2) disposed upstream of
An inside / outside air detection sensor (9) which is disposed inside the inside / outside air intake switching box (2) and detects the temperature of the inside air or outside air;
Control means (13) for performing air conditioning control using the detected temperature of the inside / outside air detection sensor (9),
The control means (13) takes in the temperature information detected by the inside / outside air detection sensor (9) as outside temperature after switching the inside / outside air switching door (16, 16A) to the outside air suction position. Features.

  According to the first aspect of the present invention, by adjusting the opening of the inside / outside air switching door (16, 16A) and selecting the position of the inside / outside air switching door (16, 16A), the inside / outside air switching door (16, 16A) is selected. The target air detected by the detection sensor (9) can be changed, and in particular, the temperature information detected by the internal / external air detection sensor (9) after switching the internal / external air switching door (16, 16A) to the external air suction position. Therefore, it is possible to obtain a vehicle air conditioner that can measure both the room temperature and the outside air temperature and control the interior of the vehicle (23) to the set temperature without requiring a separate outside air sensor.

The invention of the vehicle air conditioner according to claim 2 includes an outside air suction port (29a) for sucking outside air into the air conditioning duct (1), an inside air suction port (26a) for sucking inside air into the air conditioning duct, and outside air. The air conditioning duct (1) is provided with an inside / outside air switching door (16, 16A) capable of adjusting the inside / outside air suction state by selecting the position of the outside air suction position for sucking in, the inside air and the outside air suction position for sucking in the outside air. An inside / outside air intake switching box (2) arranged on the upstream side;
An inside / outside air detection sensor (9) that is disposed inside the inside / outside air intake switching box (2) and detects the temperature of the inside air or outside air,
The inside / outside air detection sensor (9) detects the temperature of outside air taken into the inside / outside air intake switching box (2) when the inside / outside air switching door (16, 16A) is at the outside air suction position, When the inside / outside air switching door (16, 16A) is at the inside / outside air suction position, the inside / outside air intake switching box (2) is disposed so as to detect the temperature of inside air.

  According to the invention described in claim 2, when the opening degree of the inside / outside air switching door (16, 16A) is adjusted and the inside air and the outside air are taken into the inside / outside air intake switching box (2), the inside / outside air When the temperature of the inside air is detected by a detection sensor (9) and the inflow of the inside air from the inside air suction port (26a) is blocked by setting the inside / outside air switching door (16, 16A) to the outside air suction position, Since the inside / outside air detection sensor (9) detects the temperature of the outside air, both the room temperature and the outside air temperature are measured and the vehicle (23) is controlled to the set temperature without requiring a separate outside air sensor. A vehicle air conditioner that can be obtained is obtained.

  According to a third aspect of the present invention, when the inside / outside air switching door (16, 16A) is located between the inside / outside air detection sensor (9) and the outside air inlet (29a), the inside / outside air detection is performed. A sensor (9) detects the temperature of the inside air.

  According to the invention described in claim 3, since the inside / outside air switching door (16, 16A) prevents outside air from flowing into the inside / outside air detection sensor (9) side, the outside air suction port (29a). Only the inside air taken into the inside / outside air intake switching box (2) from the inside air suction port (26a) without detecting the outside air taken into the inside / outside air intake switching box (2) from the inside / outside air detection sensor (9) Can be detected.

  According to a fourth aspect of the present invention, when viewed from the outside air inlet (29a) side, the inside / outside air detection sensor (9) is shielded by the inside / outside air switching door (16, 16A) and cannot be seen. Sometimes, the inside / outside air detection sensor (9) detects the temperature of the inside air.

  According to the fourth aspect of the invention, the inside / outside air detection sensor (9) is provided at a position where the inside / outside air switching door (16, 16A) can prevent the outside air from flowing around to the inside / outside air detection sensor (9) side. Therefore, the outside air taken in from the outside air inlet (29a) into the inside / outside air intake switching box (2) is not detected by the inside / outside air detection sensor (9), and the inside / outside air intake switching is performed from the inside air inlet (26a). Only the inside air taken into the box (2) can be detected.

  The invention described in claim 5 is characterized in that a wind shield (16a) is provided at the downstream end of the inside / outside air switching door (16, 16A).

  According to the fifth aspect of the present invention, the outside air is moved to the inside / outside air detection sensor (9) side by the wind shielding portion (16a) provided at the downstream end of the inside / outside air switching door (16, 16A). It is possible to prevent wraparound and to further improve the detection accuracy of the inside air temperature by the inside / outside air detection sensor (9).

  The invention described in claim 6 is characterized in that a wind shielding member (36) is provided to cover the downstream side of the inside / outside air detection sensor (9).

  According to the invention described in claim 6, even if a situation occurs in which the outside air taken into the inside / outside air intake switching box (2) flows backward from the downstream side of the inside / outside air detection sensor (9), The inside / outside air detection sensor (9) can be prevented from detecting outside air, and the detection accuracy of the inside air temperature by the inside / outside air detection sensor (9) can be further improved.

  The invention described in claim 7 is characterized in that a wind shielding frame (37) is provided to cover the outside air inlet (29a) side of the inside / outside air detection sensor (9).

  According to invention of Claim 7, it can prevent that the external air which flows in from the said external air suction inlet (29a) side hits the said internal / external air detection sensor (9), The said internal / external air detection sensor (9 ) Can further improve the detection accuracy of the inside air temperature.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
Below, 1st Embodiment is described using FIGS. FIG. 1 is a schematic diagram showing a configuration of a vehicle air conditioner in the present embodiment. FIG. 2 is a schematic side view illustrating an internal configuration of a vehicle on which the vehicle air conditioner according to the present embodiment is mounted. FIG. 3 is a block diagram relating to the control system of the vehicle air conditioner in the present embodiment. FIG. 4 is a partial side schematic view showing the relationship between the inside / outside air switching door and the inside / outside air detection sensor in the present embodiment. FIG. 5 is a view taken along arrow X in FIG. FIG. 6 is a flowchart showing a control flow of the vehicle air conditioner in the present embodiment.

  The vehicle air conditioner of the present embodiment is widely used for private or business passenger cars, and is used, for example, as an air conditioner for passenger cars, construction machinery vehicles, or agricultural machinery vehicles.

  The main components of the vehicle air conditioner 30 of the present embodiment are an air conditioning duct 1 for introducing air into the vehicle 23, a blower 3 as a blowing means for sending air into the air conditioning duct 1, a refrigeration cycle 20, hot water The circuit 22 and the air conditioner control device 13.

  The air conditioning duct 1 includes branch ducts 1a and 1b at its downstream end, the branch duct 1a communicates with the outlets 17a and 17b that open into the vehicle 23 room, and the branch duct 1b opens into the vehicle 23 room. It communicates with the outlet 18. The blower outlet 17a is opened at the front part in the vehicle 23 room, and the blower outlet 17b is opened upward from the rear part in the vehicle 23 room.

  In the face mode, the face mode outlet stream 24 is blown out from the outlet 17a at the front of the vehicle 23 toward the upper body of the occupant and upward from the outlet 17b at the rear of the vehicle 23. A foot mode blowout flow 25 is blown out from the blowout port 18 toward the occupant's feet. In the bi-level mode, the face mode blowout flow 24 and the foot mode blowout flow 25 are blown out simultaneously, and the blowout port switching dampers 15a and 15b respectively. The balloon mode can be switched.

  The blower 3 includes a motor 3a, a centrifugal fan 3b, and a casing 3c. The inside / outside air intake switching box 2 is provided on the upstream side of the casing 3c, and the inside / outside air intake switching box 2 is provided with an inside air intake provided in the vehicle 23 to take in air in the vehicle compartment 23, that is, inside air. An inside air suction port 26a communicating with the port 26 and an outside air suction port 29a communicating with an outside air intake port 29 provided in the vehicle 23 room for taking in air outside the vehicle compartment 23, that is, outside air, are formed. Also, inside / outside air intake switching box 2, inside / outside air switching door 16 can be selectively opened and closed between inside air inlet 26 a and outside air inlet 29 a, and the air volume ratio for taking in outside air and inside air can be adjusted. Is provided. When the outside air temperature outside the vehicle 23 is measured by the inside / outside air detection sensor 9, the inside / outside air switching door 16 is opened so as to shield the inside air inlet 26a, and the outside air temperature is detected in a state where the intrusion of the inside air is blocked. is there.

  The refrigeration cycle 20 functions as a cooling means, and is a compressor 31 that is driven by the traveling engine 38 of the vehicle 23 via the electromagnetic clutch 7, and a refrigerant that condenses and liquefies the high-temperature and high-pressure refrigerant compressed by the compressor 31. A condenser 32, a receiver 4 that temporarily stores the refrigerant condensed in the refrigerant condenser 32 and allows only liquid refrigerant to flow, an expansion valve 5 that decompresses and expands the liquid refrigerant guided from the receiver 4, and the air conditioning duct 1 The refrigerant 6 is provided between the receiver 6 and the expansion valve 5 and detects the pressure of the refrigerant. The refrigerant pressure detector 12 is a detection means, and is connected to each other through a refrigerant pipe 19. Among the components constituting the refrigeration cycle 20, the electromagnetic clutch 7, the compressor 31, the refrigerant condenser 32, the receiver 4, the refrigerant pressure detector 12, and the traveling engine 38 are disposed outside the vehicle 23. Has been.

  The electromagnetic clutch 7 that operates the compressor 31 is ON / OFF controlled based on an ON / OFF signal output from the air conditioner control device 13.

  The heating cycle 22 is provided on the downstream side of the evaporator 6 in the air conditioning duct 1. The heater core 8 heats the air flowing in the air conditioning duct 1 using the cooling water of the traveling engine 38 as a heat source, and the heater core 8 is used for traveling. A cooling water circuit (not shown) of the engine 38 and a hot water pipe 21 connected in an annular shape are configured. An air mix door 14 that adjusts the ratio of the amount of air passing through the heater core 8 and the amount of air bypassing the heater core 8 is disposed downstream of the evaporator 6 and upstream of the heater core 8.

  The air conditioner control device 13 has a built-in microcomputer (not shown) in which a control program related to air conditioning control, an arithmetic expression, and the like are stored, and as shown in FIG. Based on the signals output from the inside / outside air detection sensor 9, the solar radiation sensor 11, the post-evaporator sensor 10, the refrigerant pressure detector 12, and the engine water temperature sensor 33, the electromagnetic clutch 7, the outlet switching doors 15a and 15b, the inside and outside The air switch door 16, the air mix door 14, and the motor 3a are controlled. The air conditioner operation panel 35 is provided with a temperature setting volume 34 that is a temperature setting means for an occupant to set the room temperature, and a display unit 36 that displays the set temperature and air volume.

  The post-evaporator sensor 10 is provided for the function of preventing frost formation. When the cooling capacity wins the cooling load, the refrigerant evaporation pressure decreases, the surface temperature of the evaporator 6 becomes 0 ° C. or less, the freezing of condensed water progresses, and the flow of the passing air is prevented, and the evaporation pressure further decreases. Air will stop flowing. In order to prevent such a state, the function which controls the cooling capability of the refrigerating cycle 20 and prevents frost formation is required. As a method for providing this function, the air temperature downstream of the evaporator 6 is measured by the post-evaporator sensor 10, and the electromagnetic clutch 7 is turned off when the temperature reaches a certain temperature, for example, 4 ° C. Control to put.

  The refrigerant pressure detector 12 functions as a safety switch for protecting the refrigeration cycle 20. The refrigerant pressure detector 12 is provided outside the vehicle 23 room between the high pressure side receiver 4 and the expansion valve 5, detects the high pressure side pressure of the refrigeration cycle 20, stops the compressor 31, and sets the refrigeration cycle 20. Prevent failure of the equipment that constitutes it. When the refrigerant pressure detector 12 detects an abnormally high pressure in the refrigeration cycle 20, it turns off the electromagnetic clutch 7 and stops the compressor 31, and also detects an abnormally low pressure in the refrigeration cycle 20, and detects an abnormally low pressure. When it does, the power supply of the electromagnetic clutch 7 is turned off and the compressor 31 is stopped. When an abnormal low pressure is detected, the air conditioner is turned off, or the refrigerant is insufficient or completely absent due to gas leakage or the like. If the compressor 31 is continuously operated in this state, the compressor 31 is burned. This is to prevent this because there is a fear.

  Next, the relationship between the inside / outside air detection sensor 9 and the inside / outside air switching door 16 in the inside / outside air intake switching box 2 will be described with reference to FIGS. 4 and 5. The inside / outside air intake switching box 2 communicates with the suction port 3d of the blower 3 on the downstream side, and includes an inside air suction port 26a and an outside air suction port 29a on the box-like side surface so as to communicate with the suction port 3d. The inside air intake port 26a is connected to the inside air intake port 26 opened in the vehicle 23 room by a duct 26b, and the outside air inlet port 29a is connected to the outside air intake port 29 opened into the vehicle 23 room by a duct 29b.

  The inside / outside air switching door 16 is pivotally supported at one end side, and the other end side forms an arc from about 0 ° to about 90 ° from the state where the other end side shields the inside air suction port 26a to the state where the outside air suction port 29a is shielded. It is set as the structure rotated in the range. That is, the position A shown in FIG. 4 is an outside air suction position for sucking outside air into the inside / outside air intake switching box 2, and the inside / outside air switching door 16 at the position A completely shields the inside air inlet 26 a, Even if 3 is operated, the inside air in the vehicle 23 room does not flow into the inside / outside air intake switching box 2, and only the outside air outside the vehicle 23 room flows into the inside / outside air intake switching box 2.

  In this state, the inside / outside air detection sensor 9 provided on the side opposite to the outside air inlet 29a and inside the inside / outside air intake switching box 2 detects the diffused outside air flowing into the inside / outside air intake switching box 2. Then, a signal is sent to the air conditioner control device 13 with the temperature change as a resistance change. The mode in this state is a mode in which only air outside the vehicle 23 room is taken in without taking in the inside air, air-conditioned and blown out into the vehicle 23 room, and this is a full outside air mode in the vehicle air conditioner 30 of the present invention. . Moreover, although the thermistor is employ | adopted as an example of the inside / outside air detection sensor 9 of this invention, not only a thermistor but the sensor which can measure the temperature of air as an electrical resistor will be used as the inside / outside air detection sensor 9 of this invention. Can be applied.

  The inside / outside air switching door 16 includes one end pivotally supported at a position adjacent to both the outside air suction port 29a and the inside air suction port 26a formed so as to be adjacent to the side surface of the inside / outside air intake switching box 2. The shaft is electrically driven by a motor so that its position can be variably adjusted.

  On the other hand, the position B is an inside air suction position for sucking inside air into the inside / outside air intake switching box 2, and the outside air inlet 29 a is completely shielded by the inside / outside air switching door 16 by the inside / outside air switching door 16 at the position B. Even when the blower 3 is operated, the outside air outside the vehicle 23 room does not flow into the inside / outside air intake switching box 2, and only the inside air inside the vehicle 23 room flows into the inside / outside air intake switching box 2. Become.

  Furthermore, as shown in FIG. 4, when the inside / outside air switching door 16 is adjusted and maintained at an angle θ from the position B, the inside / outside air switching door 16 is placed inside the inside / outside air intake switching box 2. And the outside air suction position where the outside air is sucked in, and air flows from both the outside air suction port 29a and the inside air suction port 26a, and the outside air formed in the vicinity of the suction port 3d inside the inside / outside air intake switching box 2 The air mixed with the inside air is blown by the blower 3 toward the evaporator 6. In this state, the inside / outside air switching door 16 is positioned between the inside / outside air detection sensor 9 and the outside air suction port 29a, and the inside air taken into the inside / outside air intake switching box 2 from the inside air suction port 26a is The inside air temperature is detected by hitting the inside / outside air detection sensor 9. The opening / closing of the inside / outside air switching door 16 is driven by a stepping motor or the like, and the opening degree is adjusted stepwise, and the angle θ can be variably changed to adjust the intake air amount of the outside air and the inside air.

  When the inside / outside air switching door 16 is adjusted and maintained at an angle θ from the position B, the other end of the inside / outside air switching door 16 that is not pivotally supported is downstream of the inside / outside air detection sensor 9 and the blower 3 is located near the suction port 3d. In other words, the inside / outside air detection sensor 9 is located closer to the inside air inlet 26a on the upstream side than the other end of the inside / outside air switching door 16 that is not pivotally supported. Further, as shown in FIG. 4, the temperature P of the inside air is to be secured as a distance P dimension from the downstream side end face of the inside / outside air detection sensor 9 to the other end of the inside / outside air switching door 16 that is not pivotally supported. Also desirable from above.

  Further, as shown in FIG. 5, the positional relationship between the inside / outside air detection sensor 9 and the inside / outside air switching door 16 when the inside / outside air switching door 16 is adjusted and maintained from the position B to the opening angle θ is as shown in FIG. This is also characteristic when the inside of the inside / outside air intake switching box 2 is viewed from the X direction of 4, that is, from the outside air suction port 29a side to the same height as the inside / outside air detection sensor 9. As described above, the inside / outside air detection sensor 9 is located closer to the inside air suction port 26a than the other end of the inside / outside air switching door 16 that is not pivotally supported. It is in a position where it is shielded by 16 and cannot be completely seen. Accordingly, in FIG. 5, the outside air flowing in front of the inside / outside air switching door 16 is prevented from flowing around the inside / outside air detection sensor 9 side beyond the other end where the inside / outside air switching door 16 is not pivotally supported. Thus, the inside / outside air detection sensor 9 can reliably detect inside air without detecting outside air. The mode in this state is a mode in which both the outside air and the inside air are taken into the inside / outside air intake switching box 2 and are air-conditioned and blown into the vehicle 23 and the inside / outside air detection sensor 9 detects the temperature of the inside air. There is a normal outside air mode in the vehicle air conditioner 30 of the present invention. In the operation of the vehicle air conditioner 30 according to the present invention, the inside air temperature is constantly detected in order to bring the inside temperature close to the set temperature determined by the temperature setting volume 34. The inside air temperature is detected in this normal outside air mode. Shall be done at the time.

  Next, operation | movement of the vehicle air conditioner 30 of this invention is demonstrated based on the process sequence of the air-conditioner control apparatus 13 shown in FIG.

  First, when the air conditioner is turned on by the passenger, the control flow starts, the full outside air mode is activated, and the inside / outside air switching door 16 moves to a position (position A shown in FIG. 4) where the inside air inlet 26a is blocked. Then, the inflow of air into the vehicle 23 is shut off (step S60). Then, the timer starts (step S61). Further, the blower 3 is operated in the Lo mode (step S62), the outside air outside the vehicle 23 is taken into the inside / outside air intake switching box 2, and the outside air temperature is detected by the inside / outside air detection sensor 9 (step S63). When the outside air temperature is detected, the timer is stopped (step S64). In order not to make the occupant feel low or high temperature outside air, the time required from step S62 to step S64 from the start to the stop of the timer is set to several seconds (for example, 5 to 10 seconds).

  When the outside air temperature is detected, normal outside air mode operation is started (step S65), and as described above, the inside / outside air switching door 16 is adjusted and maintained from the position B to the opening of the angle θ, and the outside air and the inside air are maintained. And the inside / outside air detection sensor 9 detects the inside air temperature (step S66). During this normal operation, the set temperature signal output by operating the temperature setting volume 34, the inside air temperature signal detected by the inside / outside air detection sensor 9, and the output from the solar radiation sensor 11, the post-evaporator sensor 10, and the engine water temperature sensor 33 are output. Each signal is input to the air conditioner control device 13 and calculated (steps S67 and S68).

  In step S69, the air conditioner control device 13 determines whether or not a predetermined time has elapsed since the start of the normal outside air mode, and whether or not the temperature in the vehicle 23 room has stabilized. As a criterion for determining whether or not the room temperature has stabilized, for example, the temperature difference between the set temperature by the temperature setting volume 34 and the inside air temperature detected by the inside / outside air detection sensor 9 is equal to or less than a predetermined temperature difference (for example, 0 .5 ° C. or less) and whether the temperature change per unit time of the inside / outside air detection sensor 9 is a predetermined value or less (eg, ± 0.5 [° C./5 minutes] or less).

  If it cannot be determined that both the elapse of a predetermined time since the start of the normal outside air mode and the temperature inside the vehicle 23 are stable, ventilation is performed based on the calculation of the air conditioner control device 13 in step S68. When it is necessary, when humidity adjustment is necessary, or when the cooling load is large, the inside / outside air switching door 16 is controlled to switch between the outside air mode and the inside air mode (step S74), and the blowing temperature into the vehicle 23 room is controlled. In order to adjust, the opening degree of the air mix door 14 which determines the ratio of the heating air flow rate and the cooling air flow rate is controlled (step S75), and the air outlet switching door 15a is obtained so as to obtain an appropriate air blowing mode for the occupant's feeling. And 15b are controlled (step S76). That is, when heating is blown out, the face mode is prohibited by controlling the foot mode or the bi-level mode. In the case of cooling, control to face mode.

  Further, the refrigerant is controlled by controlling the operation of the compressor 31 by controlling the electromagnetic clutch 7 (step S77), and the input to the motor 3a for driving the blower 3 is controlled in order to ensure an appropriate amount of blown air. (Step S78). And it returns to step S67 again. The purpose of this refrigerant control is to prevent frost formation as described above, protect the refrigeration cycle 20, and maintain vehicle performance.

  On the other hand, when it can be determined that both the elapse of a predetermined time or more from the start of the normal outside air mode and that the temperature inside the vehicle 23 is stable, the process proceeds to step S70 and the full outside air mode is activated. Then, the inside / outside air switching door 16 moves to a position (position A shown in FIG. 4) where the inside air suction port 26a is shielded to block the inflow of air into the vehicle 23 (step S70). Then, the timer starts as in step S61 (step S71). Further, the outside air temperature is detected by the inside / outside air detection sensor 9 (step S72). When the outside air temperature is detected, the timer is stopped (step S73). The control of each device including the blower 3 while the outside air temperature is detected in step S72 is performed by storing the operation state of each device before step S72 in the air conditioner control device 13 and storing the mode. It will continue to operate at.

  Thus, according to the present embodiment, the air conditioner control device 13 is configured to take in the temperature information detected by the inside / outside air detection sensor 9 as the outside air temperature after switching the inside / outside air switching door 16 to the outside air suction position. Therefore, both the room temperature and the outside air temperature can be detected by the inside / outside air detection sensor 9 without requiring a separate outside air sensor.

  Further, when the opening degree of the inside / outside air switching door 16 is adjusted and the inside / outside air switching door 16 is in the inside / outside air suction position, the inside / outside air detection sensor 9 takes in the inside / outside air into the inside / outside air intake switching box 2. When the inside / outside air switching door 16 is in the outside air suction position by detecting the temperature of the inside air and adjusting the opening degree of the inside / outside air switching door 16, the inflow of the inside air from the inside air suction port 26a is blocked. Since the detection sensor 9 detects the temperature of the outside air so that the interior of the vehicle 23 is controlled to be kept at the set temperature, both the room temperature and the outside air temperature are measured without requiring a separate outside air sensor. Therefore, the number of parts can be reduced and a low-cost vehicle air conditioner can be provided.

  When the inside / outside air detection sensor 9 detects the inside air when the inside / outside air switching door 16 is positioned between the inside / outside air detection sensor 9 and the outside air suction port 29a, the outside air suction port 29a Without detecting the outside air taken into the inside / outside air intake switching box 2 from the inside / outside air detection sensor 9, only the inside air taken into the inside / outside air intake switching box 2 from the inside air intake port 26a can be detected.

  In addition, when the inside / outside air detection sensor 9 is in a position where it can not be seen by being blocked by the inside / outside air switching door 16 when viewed from the outside air inlet 29a side, the inside / outside air detection sensor 9 detects the inside air temperature. The inside / outside air switching door 16 can prevent outside air from flowing around and hitting the inside / outside air detection sensor 9, and the inside / outside air detection sensor 9 is taken into the inside / outside air intake switching box 2 from the inside air suction port 26a. Only shyness can be detected.

(Second Embodiment)
Below, the modification which makes the detection of the inside / outside air detection sensor 9 inside the inside / outside air intake switching box 2 better will be described.

  As shown in FIG. 7, as a modified example for improving the detection of the inside / outside air detection sensor 9, a wind shield 16a is provided at the downstream end of the inside / outside air switching door 16A. In other words, the wind shielding portion 16a is provided on the other end side of the inside / outside air switching door 16 that is not pivotally supported, and the wind shielding portion 16a has a plate shape protruding in the direction of the outside air suction port 29a, and the inside / outside air switching door. When 16A is adjusted and maintained from position B to an opening of an angle θ, the inside / outside air detection sensor 9 is viewed from the outside air suction port 29a side with the same level as the inside / outside air detection sensor 9 The inside / outside air detection sensor 9 has a width dimension larger than at least the lateral width of the inside / outside air detection sensor 9, and the inside / outside air detection sensor 9 is shielded by the inside / outside air switching door 16A and the wind shielding portion 16a and is completely invisible.

  Further, as shown in FIGS. 8 and 9, the inside / outside air detection may be provided by providing a wind shielding member 36 that covers the inside / outside air detection sensor 9 near the suction port 3 d of the blower 3 on the downstream side of the inside / outside air detection sensor 9. The detection of the sensor 9 can be made better. The wind shielding member 36 has a plate shape protruding in the direction of the outside air suction port 29a. When the inside / outside air detection sensor 9 is viewed in plan from the inside air suction port 26a side, the downstream side of the inside / outside air detection sensor 9, that is, the suction port. The shape completely covers the 3d side.

  Further, as shown in FIGS. 10 and 11, as another configuration that makes the detection of the inside / outside air detection sensor 9 better, a configuration in which a wind shielding frame 37 that covers the outside air inlet 29 a side of the inside / outside air detection sensor 9 is provided. And The wind shielding frame 37 prevents the outside air flowing in from the outside air suction port 29a from touching the inside / outside air detection sensor 9, and has a shape that completely covers at least the outside air suction port 29a side of the inside / outside air detection sensor 9. If you do. In the present embodiment, the wind shielding frame 37 is arranged so that the inside air flowing into the inside / outside air intake switching box 2 hits the inside / outside air detection sensor 9 and the inside air passes from the inside air suction port 26a toward the suction port 3d. Only the side periphery of the air detection sensor 9 is covered, and the inside / outside air detection sensor 9 has a frame shape in which the inside air suction port 26a side and the downstream side are opened.

  As described above, according to the present embodiment, when the air shield portion 16a is provided at the downstream end on the other end side of the inside / outside air switching door 16A that is not pivotally supported, the outside air is the inside / outside air. It is possible to prevent the switching door 16 </ b> A from entering the inside / outside air detection sensor 9 side beyond the other end side that is not pivotally supported, and the inside / outside air detection sensor 9 can further improve the accuracy of the inside air temperature detection.

  Further, in the case where the wind shielding member 36 that covers the downstream side of the inside / outside air detection sensor 9 is provided, the outside air taken into the inside / outside air intake switching box 2 flows backward from the downstream side of the inside / outside air detection sensor 9. Even if the situation occurs, it is possible to prevent the backflowed outside air from hitting the inside / outside air detection sensor 9 and detecting the outside air temperature.

  Moreover, when it is set as the structure which provided the wind-shielding frame 37 which covers the outside air inlet 29a side of the inside / outside air detection sensor 9, it prevents that the outside air which flows in from the outside air inlet 29a hits the inside / outside air detection sensor 9 In addition, a path through which the inside air hits the inside / outside air detection sensor 9 can be secured, and the detection accuracy of the inside air temperature by the inside / outside air detection sensor 9 can be further improved.

It is a schematic diagram which shows the structure of the vehicle air conditioner in 1st Embodiment. It is a side surface schematic diagram which shows the structure inside the vehicle by which the vehicle air conditioner in 1st Embodiment is mounted. It is a block diagram in connection with the control system of the vehicle air conditioner in 1st Embodiment. It is the partial side surface schematic diagram which showed the relationship between the internal / external air switching door and internal / external air detection sensor in 1st Embodiment. FIG. 5 is a view taken in the direction of arrow X in FIG. 4. It is the flowchart which showed the control flow of the vehicle air conditioner in 1st Embodiment. It is the side surface schematic diagram which showed the structure of the other inside / outside air switching door in 2nd Embodiment. It is the side surface schematic diagram which showed the structure of the wind-shielding member provided in the inside of the other inside / outside air intake switching box in 2nd Embodiment. It is the fragmentary top view which showed the relationship between the wind-shielding member shown in FIG. 8, and an inside / outside air detection sensor. It is the side surface schematic diagram which showed the structure of the wind-shielding frame as a modification of the wind-shielding member in 2nd Embodiment. It is the fragmentary top view which showed the relationship between the wind-shield frame shown in FIG. 10, and an inside / outside air detection sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioning duct 2 Inside / outside air intake switching box 3 Blower means 9 Inside / outside air detection sensor 13 Air-conditioner control device (control means)
16, 16A Inside / outside air switching door 16a Wind shielding portion 20 Refrigeration cycle 23 Vehicle 26a Inside air suction port 29a Outside air suction port 36 Wind shielding member 37 Wind shielding frame

Claims (7)

An outside air inlet (29a) for sucking outside air into the air conditioning duct (1), an inside air inlet (26a) for sucking inside air into the air conditioning duct, an outside air suction position for sucking outside air, and an inside / outside air suction position for sucking inside air and outside air The internal / external air intake switching box (2) provided with an internal / external air switching door (16, 16A) that can adjust the intake state of the internal / external air by selecting each position of the air conditioning duct (1) When,
An inside / outside air detection sensor (9) which is disposed inside the inside / outside air intake switching box (2) and detects the temperature of the inside air or outside air;
Control means (13) for performing air conditioning control using the detected temperature of the inside / outside air detection sensor (9),
The control means (13) takes in the temperature information detected by the inside / outside air detection sensor (9) as outside temperature after switching the inside / outside air switching door (16, 16A) to the outside air suction position. A vehicle air conditioner. An outside air inlet (29a) for sucking outside air into the air conditioning duct (1), an inside air inlet (26a) for sucking inside air into the air conditioning duct, an outside air suction position for sucking outside air, and an inside / outside air suction position for sucking inside air and outside air The internal / external air intake switching box (2) provided with an internal / external air switching door (16, 16A) that can adjust the intake state of the internal / external air by selecting each position of the air conditioning duct (1) When,
An inside / outside air detection sensor (9) that is disposed inside the inside / outside air intake switching box (2) and detects the temperature of the inside air or outside air,
The inside / outside air detection sensor (9) detects the temperature of outside air taken into the inside / outside air intake switching box (2) when the inside / outside air switching door (16, 16A) is at the outside air suction position, When the inside / outside air switching door (16, 16A) is in the inside / outside air suction position, the vehicle is characterized by being arranged so as to detect the temperature of the inside air taken into the inside / outside air intake switching box (2). Air conditioner.   When the inside / outside air switching door (16, 16A) is positioned between the inside / outside air detection sensor (9) and the outside air suction port (29a), the inside / outside air detection sensor (9) detects the temperature of the inside air. The vehicle air conditioner according to claim 2, wherein the vehicle air conditioner is detected.   When the inside / outside air detection sensor (9) is in a position where it is shielded by the inside / outside air switching doors (16, 16A) when viewed from the outside air inlet (29a) side, the inside / outside air detection sensor ( The vehicle air conditioner according to claim 2, wherein 9) detects the temperature of the inside air.   The vehicle air conditioner according to any one of claims 1 to 4, wherein a wind-shielding portion (16a) is provided at an end portion on the downstream side of the inside / outside air switching door (16, 16A).   The vehicle air conditioner according to any one of claims 1 to 5, further comprising a wind shielding member (36) that covers a downstream side of the inside / outside air detection sensor (9).   The vehicle air conditioner according to any one of claims 1 to 5, further comprising a windshield frame (37) that covers the outside air inlet (29a) side of the inside / outside air detection sensor (9).

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