JP4443294B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner.

  The vehicle air conditioner disclosed in Japanese Patent Application Laid-Open No. 2002-127728 is provided with a clothing surface temperature sensor that detects the surface temperature of the occupant's clothing and outputs a clothing part temperature signal, and the control device detects the thermal sensation of the occupant. The estimated value is calculated based on the clothing part temperature signal, and the air conditioning control of the passenger compartment is performed based on the thermal feeling estimated value.

According to this vehicle air conditioner, the clothing is larger than the area of the occupant's face and the amount of movement of the garment when the occupant is seated is less than that of the face. Therefore, the possibility that the clothes are out of the temperature detection range of the clothes surface temperature sensor is small, and the temperature can be detected with high accuracy and stability, so that appropriate air conditioning control can be performed.
JP 2002-127728 A

  However, in this vehicle air conditioner, when the estimated value of the thermal sensation is obtained, the thermal sensation is expressed by a mathematical expression using the amount of solar radiation detected by the solar radiation sensor. Since this solar radiation sensor does not distinguish between the case where the occupant is directly exposed to solar radiation and the case where the occupant is blocked by a roof or the like, there is a difference between the thermal sensation estimated value and the thermal sensation actually felt by the passenger. It is thought that proper air conditioning control that suits the situation cannot be performed.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle air conditioner capable of performing appropriate air conditioning control in accordance with a passenger's thermal feeling.

  In order to solve the above-described problems, a vehicle air conditioner according to a first aspect of the present invention detects a room temperature sensor 26 that detects a vehicle room temperature, a radiation temperature sensor 27 that detects a vehicle interior radiation temperature, and detects the occupant's clothing surface temperature. Clothing surface temperature sensor 28, air conditioning unit 2 for controlling the temperature by introducing inside and outside air, and supplying the vehicle interior, and control for controlling air conditioning unit 2 based on vehicle room temperature, vehicle interior radiation temperature, and clothing surface temperature And the control device 24 estimates the outside air temperature from the vehicle room temperature and the vehicle interior radiation temperature, sets the clothing surface temperature at which the occupant feels comfortable at the outside air temperature as the target clothing surface temperature, and sets the actual clothing surface. The air conditioning unit 2 is controlled so that the temperature becomes the target clothing surface temperature.

  In addition, the vehicle air conditioner according to the second aspect of the present invention introduces a radiation temperature sensor 27 for detecting the vehicle interior radiation temperature, a clothing surface temperature sensor 28 for detecting the clothing surface temperature of the occupant, and temperature control by introducing the inside and outside air. And an air conditioning unit 2 to be supplied into the vehicle interior and a control device 24 for controlling the air conditioning unit 2 based on the vehicle interior radiation temperature and the clothing surface temperature. The control device 24 includes the vehicle interior radiation temperature and the clothing surface temperature. The air conditioning unit 2 is controlled so that the actual vehicle interior radiation temperature and the clothing surface temperature fall within the comfortable temperature range set from the above.

  In the present invention, from the difference between the target clothing surface temperature obtained from the vehicle room temperature and the vehicle interior radiation temperature and the actual clothing surface temperature, it is possible to accurately grasp the influence of the amount of solar radiation, the heat capacity of the clothing, etc. A comfortable state based on the indoor radiation temperature and the clothing surface temperature can be created. Therefore, it is possible to perform appropriate air conditioning control that matches the occupant's thermal feeling.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an air conditioning unit of a vehicle air conditioner according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a refrigeration cycle of the embodiment, and FIG. 3 is a schematic configuration diagram of a control system of the embodiment. .

  The vehicle air conditioner shown in FIG. 1 includes an air conditioning unit 2 having an air passage 1 formed therein, and an upstream side of the air conditioning unit 2 has an inside air inlet 3 for taking in vehicle interior air, An outside air inlet 4 for taking in outside air in the passenger compartment is provided.

  Inside the air conditioning unit 2, there are an intake door 5 as an inside / outside air switching device for selectively opening and closing the inside air introduction port 3 and the outside air introduction port 4, and the inside and outside through the inside air introduction port 3 and the outside air introduction port 4. A blower 6 serving as a blower that introduces air and blows air toward the downstream side is provided.

  On the downstream side of the blower 6, there is provided a heat exchanger 7 that absorbs heat from the air passing through the air passage 1 and cools it, and on the downstream side of the heat exchanger 7, there is a heater core 8 that warms the air that passes through the air passage 1. A mix door 9 is provided as a temperature control device that guides a part of the cooled air to the heater core 8 and bypasses the remaining air to the heater core 8.

  An air mix chamber 10 is provided downstream of the mix door 9, and a defroster outlet 11, a vent outlet 12, and a foot outlet 13 are provided as air-conditioned air outlets so as to communicate with the air mix chamber 10. Yes. The air outlets 11, 12, and 13 are opened and closed by a defroster door 14, a vent door 15, and a foot door 16 as air distribution devices, respectively.

  In such a vehicle air conditioner, the inside air introduction port 3 or the outside air introduction port 4 is opened by the intake door 5, and the inside air or outside air is taken in when the blower 6 is driven. The taken-in air is cooled by the heat exchanger 7 and then distributed by the mix door 9 into a flow path that passes through the heater core 8 and a flow path that bypasses the heater core 8 at an appropriate ratio.

  And the air warmed by the heater core 8 and the air which detoured the heater core 8 are mixed by the air mix chamber 10, and it blows off toward the vehicle interior from the blower outlets 11-13 as an air conditioning wind.

  The heat exchanger 7 constitutes a part of the refrigeration cycle shown in FIG. 2, and cools the air by evaporating the refrigerant circulating in this cycle. In FIG. 2, 19 is a compressor, which is driven by a driving force from an engine or the like to compress the refrigerant. The refrigerant compressed by the compressor 19 is condensed by the heat exchanger 20 arranged outside the passenger compartment, expanded by the expansion valve 21, evaporated by the heat exchanger 7, and returned to the compressor 19.

  As shown in FIG. 3, the control system according to the present embodiment includes a control amplifier 24 as a control device configured by a microcomputer including a CPU, a ROM, and a RAM.

  The control amplifier 24 includes an outside air temperature sensor 25 that detects the outside air temperature, a room temperature sensor 26 that detects the vehicle room temperature, a radiation temperature sensor 27 that detects the radiation temperature emitted from the interior material in the vehicle interior, and the surface temperature of the occupant's clothing. A clothing surface temperature sensor 28 to be detected is connected.

  The radiation temperature sensor 27 detects the temperature of a component that can be correlated with the average radiation temperature of the surface of a vehicle interior material (for example, a panel, roof, floor, window, etc.). Further, it is preferable that the surface of the back side of the passenger seat, the center portion of the back seat of the rear seat, or the like is a place where there is no heat conduction from the outside air and where the conditioned air is not directly applied, and where the solar radiation is not directly applied.

  The radiation temperature sensor 27 may be a contact type that detects the temperature by contacting the object to be measured (for example, a thermistor or a thermocouple), or a non-contact type that detects the temperature without contacting the object to be measured. A thing (for example, a pyrothermal sensor, a thermopile) etc. can be used suitably. By using these sensors, there are advantages that the manufacturing cost is reduced and the space can be saved.

  The radiation temperature is also expressed as MRT = Σ (surface temperature × area of each part) / area of each part (° C.): peripheral wall average temperature. In addition, MRT (Mean Radiant Temperature) is the temperature averaged by the projection area on the human body on the vehicle interior material surface.

  Generally, a glove thermometer is used as a measurement method, and MRT = glove temperature + 2.4 × √V × (glove temperature−temperature). If the wind speed can be estimated, the average temperature of the radiation surface may be used according to the definition. Is possible. In the passenger compartment, the wind speed is almost determined by the fan speed, so measurement from the radiation surface is also possible.

  In the present invention, such a measurement is not performed, and the control amplifier 24 estimates the average radiation temperature on the surface of the vehicle interior material from the detection value of the radiation temperature sensor 27. In other words, assuming that the average radiation temperature based on the air conditioning stability of the target vehicle is a function of the vehicle room temperature and the outside air temperature, k1 × predetermined part surface temperature (when the air conditioning is stable), and the vehicle room temperature and the outside air temperature are determined. The fact that the surface temperature of interior material of the vehicle interior is determined from the thermal conductivity of the vehicle is utilized.

  k1 is a proportional constant, and the average radiation temperature is estimated from the difference between the part surface temperature actually measured by the radiation temperature sensor 27 and the part surface temperature when the air conditioning is stable. The actual average radiation temperature is estimated based on the following formula.

  Actual average radiation temperature-average radiation temperature (when stable) = k1 x (measured component surface temperature-stable component surface temperature). When the vehicle temperature is stable, the vehicle temperature and the outside air temperature are determined from the time when the vehicle temperature is stabilized.

  According to such a method, since it is not necessary to use a special radiation temperature sensor, an increase in manufacturing cost can be suppressed.

  The clothing surface temperature sensor 28 detects the temperature of the surface including the range where the sun shines on the clothing, and a non-contact type sensor (for example, a pyrothermal sensor or a thermopile) that detects the temperature without contacting the object to be measured. Used.

  If the clothing surface temperature sensor 28 is an infrared sensor, particularly a compound eye that performs precise temperature measurement, the radiation temperature sensor 27 can also serve as the radiation temperature sensor 27 by simultaneously measuring the radiation temperature representative outside the clothing surface. Manufacturing costs can be reduced.

  In addition, by detecting the surface temperature including the range where the solar radiation hits the clothing, if the clothing surface temperature is higher than the estimated temperature, it is assumed that the solar radiation is directly hitting the occupant, and air conditioning control is performed to cancel the effect. Therefore, it is possible to perform appropriate air conditioning control that matches the occupant's thermal feeling. Further, since the solar radiation sensor can be omitted, the manufacturing cost is reduced.

  The control amplifier 24 estimates the outside air temperature from the estimated average radiation temperature, the vehicle room temperature, and the thermal conductivity of the vehicle, and sets the clothing surface temperature at which the occupant feels comfortable at the estimated outside temperature as the target clothing surface temperature. The air conditioning unit 2 is controlled so that the clothing surface temperature becomes the target clothing surface temperature.

  Note that the target clothing surface temperature is when the amount of clothing in an indoor environment that is comfortable by being air-conditioned to the outside air temperature when the solar radiation does not hit the occupant, the vehicle room temperature and the vehicle interior radiation temperature are comfortable. It is the surface temperature of the clothes when in a state.

  This target clothing surface temperature is set within a range where more than 90% of the person feels comfortable in terms of thermophysiology, such as Standard New Effective Temperature (SET) and Predicted Mean Vote comfort equation (PMV). Then, since it is an objective standard, appropriate air-conditioning control can be performed, and flexible control can be performed with a wide control range.

  There is a correlation between the vehicle room temperature, the vehicle interior radiation temperature, and the clothing surface temperature when the passenger feels comfortable. For example, when the vehicle room temperature is higher than the vehicle interior radiation temperature, the vehicle room temperature has risen due to sunlight, or it takes a short time to get off the heated vehicle and board again, and the temperature difference is maintained due to heat capacity. This is considered to be the case. That is, the influence of solar radiation and the influence of the lifting interval are large.

  The correlation between the vehicle interior radiation temperature and the target clothing surface temperature may be obtained from a characteristic diagram obtained by actual measurement, or may be obtained by calculation based on a theory such as thermal physiology.

  FIG. 4 shows the average radiation temperature (symbol A) with respect to the outside air temperature, the target clothing surface temperature (symbol B), the vehicle interior set temperature (symbol C) that the occupant considers comfortable based on the outside air temperature, and the outside air temperature. It is a characteristic diagram which shows the relationship of the estimated amount of clothes (code | symbol D) in the vehicle interior temperature-controlled.

  In addition, clo, which is the unit of clothing amount, is the amount of thermal insulation of clothing, and is the value proposed by ASHRE, and a white standard male clothing person sitting on a chair can maintain a comfortable state with an average skin temperature of 33 ° C. This is the amount of thermal insulation required for clothing.

  When the actual clothing surface temperature is higher than the target clothing surface temperature indicated by the symbol B in FIG. 4, the vehicle room temperature is high, the clothing receives radiation such as solar radiation, or the amount of heat received is over, or the clothing temperature is high. It shows that it has departed from the comfort range. In this state, the passengers feel hot. On the other hand, if it is the opposite, it indicates that the clothes are cold or the vehicle room temperature is low.

  By comparing the target clothing surface temperature with the actual clothing surface temperature, it is possible to quantitatively grasp the influence of solar radiation, etc., and it can be used for air conditioning control and correction of air conditioning control. . In the case of air-conditioning control, a control sequence is made so that the target vehicle room temperature, target vehicle interior radiation temperature, and target clothing surface temperature are achieved. In the case of air-conditioning control correction, control as solar radiation correction is performed. A sequence will be incorporated.

  Even if the occupant is exposed to the outside air for a long time, even if the clothing surface temperature differs from the target temperature, the amount can be grasped, and control and correction control can be performed automatically. Matched control can be performed. That is, appropriate air conditioning is possible by determining the target clothing surface temperature and controlling it to reach that temperature.

  The characteristic curve shown in FIG. 4 is stored in the memory 24a (storage means) of the control amplifier 24 and used as a control map.

  Other configurations of the control system of the present embodiment are the same as those of the conventional system, and although not shown, the intake air temperature sensor and the blown air temperature sensor of the heat exchanger 7, the cooling water temperature sensor of the engine, the temperature sensor of the heater core 8, the compression A discharge refrigerant pressure sensor of the machine 19 is provided.

  Next, the control procedure of 1st Embodiment is demonstrated based on the flowchart shown in FIG.

  When the air conditioner switch is turned on and control is started, after various sensors and control amplifier 24 are initialized, it is determined in step S5 whether or not the vehicle is stopped. If YES, the flow ends. In the case of NO, in step S10, the control amplifier 24 reads the detection value Tr of the room temperature sensor 26 and the detection value Tclo of the clothing surface temperature sensor 28, and also reads the detection value of the radiation temperature sensor 27 to calculate the average radiation temperature Tmrt. .

  In step S20, the control amplifier 24 estimates the outside air temperature from the estimated average radiation temperature, the vehicle room temperature, and the thermal conductivity of the vehicle, and calculates the target clothing surface temperature Ta at the estimated outside air temperature.

  Next, in step S30, it is determined whether Tclo> Ta + α. Α is a comfortable temperature deviation. Here, it is determined whether or not Tclo is above the gray region R in FIG. In the case of YES, the air conditioning unit 2 is controlled so that the vehicle room temperature is lowered in step S40.

  If NO in step S30, the process proceeds to step S50 to determine whether Tclo> Ta-α. In the case of YES, it means that Tclo is in the gray region R in FIG. 4, so that the control state of the air conditioning unit 2 is made the current state in step S60 so that the vehicle room temperature does not change.

  In the case of NO in step S50, it means that Tclo is below the gray region R in FIG. 4, so the process proceeds to step S70 and the air conditioning unit 2 is controlled so that the vehicle room temperature is raised.

  Thus, by estimating the outside air temperature from the vehicle room temperature and the vehicle interior radiation temperature, setting the target clothing surface temperature based on this, and performing control so that the actual clothing surface temperature becomes the target clothing surface temperature, Since it is possible to accurately grasp the influence of the amount of solar radiation, the heat capacity of clothes, etc., it is possible to provide a comfortable indoor temperature environment according to the thermal sensation of the occupant.

  In addition, since the radiation temperature in the passenger compartment is measured by the radiation temperature sensor, appropriate temperature control can be performed in consideration of the amount of radiation from the interior of the vehicle during the air conditioning transition period such as warm-up and cool-down. The temperature can be quickly adjusted with respect to the passenger's feeling of heat, and the time to reach the desired air conditioning performance in the transition period can be shortened. In addition, since the control is automatically performed so that the room temperature matches the radiation temperature, various correction controls are simplified.

  Further, by measuring the radiation temperature with the radiation temperature sensor, it is possible to grasp the warming condition and the cooling condition of the vehicle when the passenger gets on and off frequently, so that the optimal air conditioning control amount can be obtained.

  In addition, a comfortable temperature range is set for the target clothing surface temperature, and when the actual clothing surface temperature is outside the comfortable temperature range, driving is performed at the maximum capacity so that the point falls within the comfortable temperature range. You can escape quickly.

  Furthermore, since it controls using room temperature, radiation temperature, and clothing surface temperature, an external temperature sensor can also be omitted. Moreover, since the influence of solar radiation is reflected in the clothing surface temperature and radiation temperature, a solar radiation sensor is unnecessary. Therefore, the manufacturing cost is reduced.

  In addition, the measurement range of the clothing surface temperature is not only the part affected by solar radiation, but the measurement part is subdivided such as the upper body, lower body, right body, left body, etc., and these are measured individually, for each part When air conditioning control (blowout temperature control, mode control, air volume control, wind direction control, etc.) corresponding to the surface temperature is performed, comfort is further improved.

  Next, a second embodiment of the present invention will be described. Note that the hardware configuration of this embodiment is the same as that of the first embodiment, and a duplicate description is omitted.

  As shown in FIG. 6, there is a correlation between the vehicle interior radiation temperature and the clothing surface temperature, which can be expressed as a function. Further, an upper limit and a lower limit can be provided for the uncomfortable region of the vehicle interior radiation temperature and the uncomfortable region of the clothing surface temperature, respectively, and used as control values.

  The area where the passenger feels comfortable can be represented by the areas indicated by reference numerals 1-3. The control target line C · L that is the median value can be expressed by a mathematical expression. The control target line C.D. Since the mathematical expression of L changes, the control method is changed accordingly, and the coordinates composed of the vehicle interior radiation temperature and the clothing surface temperature are represented by the control target line C.I. What is necessary is just to make it approach L.

  The control amplifier 24 indicates that the value of the clothing surface temperature sensor 28 is equal to the control target line C.I. The intake door 5, blower 6, defroster door 14, vent door 15, foot door 16, etc. of the air conditioning unit 2 are controlled so as to enter the belt-shaped comfort area R ′ formed along L.

  That is, the clothing surface temperature sensor is controlled by the control target line C.I. When the position deviates from L, it is driven rapidly and the control target line C.I. Control is performed so as to approach L. When the vehicle interior radiation temperature is improved, the optimum clothing surface temperature also changes, so it is possible to control by setting the control target based on the rate of change.

  As described above, solar radiation is a large disturbance factor for the clothing surface temperature. Therefore, the behavior of the air conditioning system differs between the upper body and lower body, which are prone to solar radiation, and if the clothing surface temperature of not only the upper body but also the lower body can be measured, the temperature of each body can be ascertained. Can do. For example, it is possible to perform a feeling improving operation such as directing the conditioned air only to a portion that is exposed to solar radiation.

  The control amplifier 24 controls the temperature of the conditioned air supplied from the air conditioning unit 2 to the vehicle interior based on the vehicle interior radiation temperature, and the difference between the vehicle room temperature and the target vehicle room temperature (set temperature), the vehicle interior radiation temperature and the target vehicle interior. The air speed control of the air conditioning unit 2 is performed based on the difference in radiation temperature and the difference between the clothing surface temperature and the target clothing surface temperature.

  In this way, by performing air conditioning control centered on radiation temperature and clothing surface temperature, it is possible to perform control closer to the passenger's thermal feeling than when performing air conditioning control only at room temperature, so comfort is improved. improves.

  In order to incorporate the effect of the blown air velocity into the control content, it is necessary to be able to grasp the blown air temperature at the grill. Therefore, the temperature at the portion where the air distribution is controlled according to the mode setting of the air conditioning unit 2 or at the blow grill A sensor for measurement will be added. If the temperature of the outlet is known, other methods may be used.

  Next, the control procedure of 2nd Embodiment is demonstrated based on FIG. 6, FIG.

  When the air conditioner switch is turned on and control is started, after various sensors and the control amplifier 24 are initialized, it is determined in step S105 whether or not the vehicle is stopped. If YES, the flow ends. In the case of NO, in step S110, the control amplifier 24 reads the detection value Tclo of the clothing surface temperature sensor 28 and also reads the detection value of the radiation temperature sensor 27 to calculate the average radiation temperature Tmrt.

  In step S120, it is determined whether T1 ≦ Tclo ≦ T2 and Tm1 ≦ Tmrt ≦ Tm2. Here, T1 is a lower limit temperature at which a person who is about 90% feels comfortable at the set temperature, and T2 is an upper limit temperature at which a person who is about 90% feels comfortable at the set temperature.

  Tm1 is the lowest radiation temperature that is considered comfortable for heating (usually the radiation temperature that provides a comfortable feeling at the set temperature in the winter environment) Tm2 is the highest radiation temperature that is considered comfortable for cooling (Normally, the radiation temperature at which a comfortable feeling can be obtained at the set temperature in the clothing of the indoor environment in summer).

  If YES in step S120, the process proceeds to step S130 to determine whether Tma ≦ Tmrt ≦ Tmb (see FIG. 5). Here, Tma is the lowest temperature at which the occupant feels comfortable without correcting the set temperature with the automatic air conditioner (usually the radiation temperature at which the comfortable feeling is obtained when the set temperature is used in the indoor environment in winter). Tmb is a median value of the set temperature (a temperature at which 90% or more people can feel comfortable when a person dressed in an air-conditioned indoor environment gets on), and is generally around 25 ° C. .

  If YES in step S130, the process proceeds to step S140, and the detected value Tclo of the clothing surface temperature sensor 28 is equal to the control target line C.I. It is determined whether it is located below L (see FIG. 5).

  In the case of YES, the process proceeds to step S150, and the heating capacity is increased to operate. Moreover, in the case of NO, it progresses to step S60 and reduces heating capability. Therefore, the point with Tclo and Tmrt as coordinates is the control target line C.I. L will be approached.

  If NO in step S120, the process proceeds to step S170 to determine whether Tmrt <Tm1 or Tclo <T1. If YES, the process proceeds to step S175 to determine whether Tmrt> Tm2 and Tclo <T1, and if NO, the process proceeds to step S180 to operate at the maximum heating capacity. In the case of YES, it progresses to step S190 and it drive | operates with the maximum cooling capacity. Also, if NO in step S170, the process proceeds to step S190.

  If NO in step S130, the process proceeds to step S200 to determine whether Tm1 ≦ Tmrt <Tma (see FIG. 5). In the case of YES, the process proceeds to step S210, where the detected value Tclo of the clothing surface temperature sensor 28 is the control target line C.I. It is determined whether it is located below L. As shown in FIG. 5, the target clothing surface temperature in this control range is constant (Tcb) over the entire range.

  If YES in step S210, the process proceeds to step S220, and the heating capacity is increased to operate. If NO, the process proceeds to step S230, and the heating capacity is reduced.

  If NO in step S200, Tmb <Tmrt ≦ Tm2 (see FIG. 5), the process proceeds to step S240, and the detected value Tclo of the clothing surface temperature sensor 28 is the control target line C.I. It is determined whether or not the position is greater than or equal to L. As shown in FIG. 5, the target clothing surface temperature in this control range is constant (Tca) over the entire range.

  If YES in step S240, the process proceeds to step S250, and the cooling capacity is increased to operate. If NO, the process proceeds to step S260, and the cooling capacity is reduced.

  As described above, since the control is performed so that the radiation temperature and the clothing surface temperature approach the control target line, a comfortable indoor temperature environment corresponding to the thermal sensation of the occupant can be provided.

  In addition, since the radiation temperature in the passenger compartment is measured by the radiation temperature sensor, appropriate temperature control can be performed in consideration of the amount of radiation from the interior of the vehicle during the air conditioning transition period such as warm-up and cool-down. The temperature can be quickly adjusted with respect to the passenger's feeling of heat, and the time to reach the desired air conditioning performance in the transition period can be shortened. In addition, since the control is automatically performed so that the room temperature matches the radiation temperature, various correction controls are simplified.

  Further, by measuring the radiation temperature with the radiation temperature sensor 27, it is possible to grasp the warming condition and the cooling condition of the vehicle when the passenger gets on and off frequently, so that the optimum air conditioning control amount can be obtained.

  In addition, if a comfortable temperature range is set and the point with the coordinates of the clothing surface temperature and average radiation temperature is outside the comfortable temperature range, driving is performed at maximum capacity so that the point falls within the comfortable temperature range. Quickly escape from the temperature range.

  Furthermore, since it controls using room temperature, radiation temperature, and clothing surface temperature, an external temperature sensor can also be omitted. Moreover, since the influence of solar radiation is reflected in the clothing surface temperature and radiation temperature, a solar radiation sensor is unnecessary. Therefore, the manufacturing cost is reduced.

The database is stored in the memory 24a of the control amplifier 24, and this database is also used to measure the measurement range of the clothing surface temperature as well as the part affected by solar radiation, such as the upper body, lower body, right body, left body. The comfort is improved by subdividing the parts, measuring these individually, and performing air conditioning control (blowout temperature control, mode control, air volume control, wind direction control, etc.) according to the surface temperature for each part. To do.

  In addition, various modifications can be made to the above embodiment without departing from the gist of the present invention.

The schematic block diagram of the air-conditioning unit of the vehicle air conditioner which is one Embodiment of this invention. The schematic block diagram of the refrigerating cycle of embodiment. The schematic block diagram of the control system of embodiment. The characteristic line figure which shows the relationship of the average radiation temperature with respect to external temperature, target clothing surface temperature, vehicle interior preset temperature, and assumed clothing amount. The control flowchart of 1st Embodiment. The characteristic line figure which shows the relationship between vehicle interior radiation temperature and clothing surface temperature. The control flowchart of 2nd Embodiment. The control flowchart of 2nd Embodiment.

Explanation of symbols

2 Air conditioning unit 24 Control amplifier (control device)
24a Memory (storage means)
25 Outside temperature sensor 26 Room temperature sensor 27 Radiation temperature sensor 28 Clothing surface temperature sensor

Claims (11)

A room temperature sensor (26) for detecting the vehicle room temperature;
A radiation temperature sensor (27) for detecting the vehicle interior radiation temperature;
A clothing surface temperature sensor (28) for detecting the clothing surface temperature of the occupant;
An air conditioning unit (2) that introduces internal and external air to regulate the temperature and supplies the air to the passenger compartment;
A control device (24) for controlling the air conditioning unit (2) based on the vehicle room temperature, the vehicle interior radiation temperature, and the clothing surface temperature;
With
The control device (24) estimates the outside air temperature from the vehicle room temperature and the vehicle interior radiation temperature, sets the clothing surface temperature at which the occupant feels comfortable at the outside air temperature as the target clothing surface temperature, and the actual clothing surface temperature is the target clothing surface temperature. An air conditioner for vehicles which controls an air conditioning unit (2) so that it may become temperature. A radiation temperature sensor (27) for detecting the vehicle interior radiation temperature;
A clothing surface temperature sensor (28) for detecting the clothing surface temperature of the occupant;
An air conditioning unit (2) that introduces internal and external air to regulate the temperature and supplies the air to the passenger compartment;
A control device (24) for controlling the air conditioning unit (2) based on the vehicle interior radiation temperature and the clothing surface temperature;
With
The control device (24) controls the air conditioning unit (2) so that the actual vehicle interior radiation temperature and the clothing surface temperature are within a comfortable temperature range set from the vehicle interior radiation temperature and the clothing surface temperature. A vehicle air conditioner.   The vehicular air conditioner according to claim 1 or 2, wherein the clothing surface temperature sensor (28) detects a temperature of a surface including a range where the solar radiation hits the clothing.   The control device (24) controls the temperature of the conditioned air supplied to the vehicle interior by the air conditioning unit (2) based on the vehicle interior radiation temperature, and the difference between the vehicle room temperature and the target vehicle room temperature, the vehicle interior radiation temperature and the target vehicle interior. The vehicle air conditioner according to claim 1 or 2, wherein the air speed control of the air conditioning unit (2) is performed based on a difference in radiation temperature and a difference between a clothing surface temperature and a target clothing surface temperature.   3. The vehicle according to claim 1, wherein the correlation between the target clothing surface temperature and the vehicle interior radiation temperature is obtained from a characteristic curve obtained by actual measurement or from a calculation formula based on a theory such as thermal physiology. Air conditioner.   When the difference between the clothing surface temperature and the target clothing surface temperature is greater than or equal to a predetermined value, the control device (24) changes the direction of the conditioned air supplied from the air conditioning unit (2) to the vehicle interior so that it is exposed to sunlight in the clothing. The vehicle air conditioner according to claim 3, wherein   The radiation temperature sensor (27) detects the surface temperature of a predetermined part in the passenger compartment, and the control device (24) estimates an average radiation temperature based on the outside air temperature, the room temperature, and the radiation temperature. The vehicle air conditioner according to claim 1 or 2.   The control device (24) determines the target clothing surface temperature range within a range where 90% or more of the person is comfortable with thermophysiology such as the new standard effective temperature and the comfort index, and the clothing surface temperature is within the temperature range. The vehicle air conditioner according to claim 1 or 2, wherein the air conditioning unit (2) is controlled so as to become.   The clothing surface temperature sensor (28) individually measures the surface temperature of a plurality of parts of the clothing, and the control device (24) supplies an air conditioning unit according to the surface temperature to each part. The vehicle air conditioner according to claim 1 or 2, wherein 2) is controlled.   The vehicular air conditioner according to claim 1 or 2, wherein the clothing surface temperature sensor (28) also serves as a radiation temperature sensor (27) for detecting a surface temperature of a predetermined part in the passenger compartment. 11. The vehicle air conditioner according to claim 10, wherein the radiation temperature sensor (27) and the clothing surface temperature sensor (28) are non-contact type sensors that detect temperature without contacting the object to be measured.

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