JPH0820227A - Air conditoner for electric vehicle - Google Patents

Abstract

PURPOSE:To reduce the power of a window glass defogging battery by controlling in such a way that an outside air inlet opening/closing means opens an outside air inlet large when the computed value of an absolute humidity computing means is more than the computed value of a saturated absolute humidity computing means while the outside air inlet is opened small when it is less. CONSTITUTION:The window glass surface temperature of a vehicle is computed from the detection value of a cabin internal temperature detecting means 27, an outside air temperature detecting means 28 and a pressure detecting means 30 for detecting the physical quantity. Since the pressure detecting means 30 has correlation with the blowoff air temperature, the window glass surface temperature is computed with accuracy, and a separate detecting sensor for the blowoff air temperature is dispensed with. An absolute humidity computing means computes absolute humidity from the temperature detected by the cabin internal temperature detecting means 27 and relative humidity detected by a relative humidity detecting means 29. According to whether this absolute humidity is more or less than the saturated absolute humidity computed by a saturated absolute humidity computing means, an opening/closing driving means 15 is controlled so as to increase or decrease the rate of opening an outside air inlet by an outside air inlet opening/closing means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for an electric vehicle which controls the temperature of blown air into the vehicle compartment by controlling the rotation speed of a compressor.

[0002]

2. Description of the Related Art A control device for automatically performing anti-fogging in a vehicle compartment has been conventionally known, and as a known technique thereof, there is, for example, Japanese Patent Laid-Open No. 57-70555. According to this known technique, the window glass surface temperature T1 is first estimated from the vehicle interior temperature and the outside air temperature, and the saturated water vapor pressure P1 is calculated from the estimated temperature T1. Further, the vehicle interior water vapor pressure P is calculated from the vehicle interior temperature and the relative humidity inside the vehicle interior. When the vehicle interior water vapor pressure P is larger than a value P1 'which is slightly smaller than the saturated water vapor pressure P1, it is considered that the window glass is fogged and a defrosting device such as a heat ray heater is operated.

[0003]

In an electric vehicle, however, if the defrosting device is unnecessarily operated to prevent the window glass from being fogged, the electric power of the running battery is wasted and the traveling distance is reduced. The problem of shortening occurs. Therefore, the surface temperature of the window glass must be estimated as accurately as possible and the power consumed for anti-fogging should be minimized.

Therefore, the present invention aims to accurately estimate the window glass surface temperature by considering the vehicle interior temperature, the outside air temperature, and the temperature of the air blown from the defroster outlet toward the window glass. Although it is a technical issue, if a means for detecting the defroster blown air temperature is provided at the defroster blowout port, the number of parts increases and the cost increases.

In view of the above problems, the present invention accurately estimates the window glass surface temperature without separately providing a means for detecting the defroster blown-air temperature at the defroster blow-out port, thereby preventing the window glass. It is an object of the present invention to provide an air conditioner for an electric vehicle that can reduce the electric power consumed by a running battery due to fog as much as possible.

[0006]

In order to achieve the above-mentioned object, the present invention provides a blower means (3) for generating an air flow and an air blown from the blower means (3). A compressor (10) that rotates in response to electric power supplied from an air passage (2) that leads into a room and a vehicle running battery (33) and that sucks, compresses, and discharges a refrigerant by this rotation.
A condenser (14) for condensing the refrigerant discharged by the compressor (10), a pressure reducing means (13) for reducing the pressure of the refrigerant from the condenser (14), and a refrigerant downstream of the pressure reducing means (13). Side and on the suction side of the compressor (10),
An evaporator (11) for evaporating the refrigerant from the decompression means (13), a physical quantity detection means (30, 70) for detecting a physical quantity related to the heat of condensation of the condenser (14), and a target inside the vehicle. A target outlet temperature calculating means (step 110) for calculating an outlet temperature, wherein the air in the air passage (2) is heated by the heat of condensation of the condenser (14). Based on the target blowout temperature calculated by the temperature calculating means (step 110) and the physical quantity detected by the physical quantity detecting means (30, 70), the blowout temperature into the vehicle interior becomes the target blowout temperature. An air conditioner for an electric vehicle, comprising: an electric power control unit (steps 120 to 140) for controlling electric power supplied from the battery (33) to the compressor (10). An outside air suction port (8) formed in an air upstream side portion of the passage (2) and communicating with the outside of the vehicle compartment, an outside air suction port opening / closing means (9) for opening and closing the outside air suction port (8), and the outside air suction port An opening / closing drive means (15) for driving the opening / closing means (9) and a defroster for discharging the air heated by the heat of condensation toward the window glass of the automobile, which is formed at a downstream side portion of the air passage (2). Air outlet (2a), vehicle interior temperature detecting means (27) for detecting the temperature inside the vehicle, outside air temperature detecting means (28) for detecting the temperature of the outside air, and relative humidity detection for detecting the relative humidity inside the vehicle. Means (29), the vehicle interior temperature detected by the vehicle interior temperature detection means (27), the outside air temperature detected by the outside air temperature detection means (28), and the physical quantity detection means (30, 70) What was done Based on the amount, the window glass surface temperature calculating means for calculating the surface temperature of the window glass (step 210, step 220)
And the window glass surface temperature calculating means (step 210,
Saturation absolute humidity calculating means (step 230) for calculating the saturation absolute humidity corresponding to the window glass surface temperature calculated in step 220), and the vehicle interior temperature detecting means (2)
An absolute humidity calculating means (step 240) for calculating an absolute humidity in the vehicle interior based on the vehicle interior temperature detected by 7) and the relative humidity detected by the relative humidity detecting means (29); Humidity calculation means (step 2
40) when the absolute humidity inside the vehicle compartment is greater than the saturated absolute humidity calculated by the saturated absolute humidity calculating means (step 230), the outside air inlet opening / closing means (9) opens the outside air inlet ( 8) The opening ratio is increased, and when the calculated vehicle interior absolute humidity is less than the calculated saturated absolute humidity, the outside air inlet opening / closing means (9) opens the outside air inlet (8). An opening / closing control means (step 260) for controlling the opening / closing drive means (15) so as to reduce the opening ratio is provided.

Further, as described in claim 2, claim 1
The air conditioner for an electric vehicle as described above, wherein the condenser (1
4) is arranged in the air passage (2), and the physical quantity detecting means (30, 70) is a high pressure detecting means (30) for detecting a high pressure on the discharge side of the compressor (10). May be.

Further, as described in claim 3, claim 1
In the electric vehicle air conditioner described above, the heat of condensation (1
The heater (6) in which hot water heated by 4) flows
1), the heater (61) is provided with the air passage (2).
And the physical quantity detection means (30, 70)
It may be a hot water temperature detecting means (70) for detecting the temperature of the hot water supplied to the heater.

Further, as described in claim 4, claim 1
In the air conditioner for an electric vehicle according to any one of 1 to 3, rain condition determining means (31, step 20) for determining a rain condition.
0) is provided, and it is determined that the window glass surface temperature calculating means (step 210, step 220) is in a raining state than when it is determined by the raining state determining means (31, step 200) that it is not a raining state It is preferable that the window glass surface temperature is calculated to be lower when the above is performed.

The reference numerals in the above parentheses indicate the correspondence with the concrete means of the embodiment described later.

[0011]

According to the first and fourth aspects of the invention, the electric power control means controls the vehicle interior based on the target temperature calculated by the target outlet temperature calculation means and the physical quantity detected by the physical quantity detection means. The electric power supplied from the battery to the compressor is controlled so that the temperature of the air blown into the compressor becomes the target temperature.

That is, since the air in the air passage is constructed to be heated by the heat of condensation of the condenser, there is a correlation between the physical quantity related to this heat of condensation and the temperature of the air blown into the passenger compartment. There will be. Therefore, the physical quantity corresponding to the target temperature is back-calculated from this correlation, and the electric power supplied to the compressor is controlled so that the actual physical quantity becomes the back-calculated physical quantity. The temperature becomes the target temperature.

Further, the window glass surface temperature calculation means calculates the window glass surface temperature of the automobile from the vehicle interior temperature, the outside air temperature, and the physical quantity. Here, the physical quantity is used for this calculation, as described above, between the physical quantity and the temperature of air blown into the vehicle interior, and by extension, there is a correlation between the physical quantity and the temperature of air blown from the defroster air outlet. Because there is. Further, the reason for using the vehicle interior temperature, the outside air temperature, and the physical quantity for this calculation is to calculate the window glass surface temperature with high accuracy.

Then, the saturated absolute humidity calculating means calculates the saturated absolute humidity corresponding to the window glass surface temperature calculated by the window glass surface temperature calculating means. That is, the saturated absolute humidity is the humidity at which the window glass starts to become cloudy when the absolute temperature in the vehicle compartment is equal to or higher than the saturated absolute humidity when the window glass surface temperature is the calculated temperature.

Further, the absolute humidity calculating means, based on the vehicle interior temperature detected by the vehicle interior temperature detecting means and the relative humidity in the vehicle interior detected by the relative humidity detecting means,
Calculate the absolute humidity inside the vehicle. That is, the actual absolute humidity in the vehicle compartment is calculated. And the opening and closing control means, when the vehicle interior absolute humidity calculated by the absolute humidity calculating means is more than the saturated absolute humidity calculated by the saturated absolute humidity calculating means, that is, when the window glass is easily fogged,
The opening / closing drive means is controlled so as to increase the rate at which the outside air inlet opening / closing means opens the outside air inlet.

As a result, the ventilation volume in the vehicle compartment increases and the absolute humidity in the vehicle compartment decreases. Then, the absolute humidity in the vehicle compartment becomes lower than the saturated absolute humidity, and the fogging of the window glass is removed. Further, the opening / closing control means sucks the outside air when the absolute humidity in the vehicle compartment calculated by the absolute humidity calculating means is less than the saturated absolute humidity calculated by the saturated absolute humidity calculating means, that is, when the window glass is hard to become cloudy. The opening / closing drive means is controlled so as to reduce the rate at which the mouth opening / closing means opens the outside air inlet.

As described above, in the invention according to claim 1, the physical quantity detecting means used for controlling the temperature of the air blown into the vehicle compartment is used to detect the temperature of the air blown from the defroster outlet. Therefore, it is possible to accurately calculate the window glass surface temperature without using a separate device for detecting the defroster outlet air temperature at the defroster outlet, and to use it to prevent fogging of the window glass. The electric power of the running battery can be reduced.

Particularly, in the invention according to claim 4, the temperature calculated by the window glass surface temperature calculating means is set to be lower when it is raining than when it is not raining. In fact, when it is raining, the surface temperature of the window glass will be lower than when it is not raining.By doing this, the surface temperature of the window glass can be calculated accurately regardless of the rainfall. it can.

[0019]

EXAMPLES Next, examples of the present invention will be described with reference to FIGS. First, the overall configuration of this embodiment will be described with reference to FIG. The air conditioner 1 includes a duct 2 that guides blown air into the passenger compartment, a blower unit 3 that introduces air into the duct 2 and sends the air into the passenger compartment, an accumulator-type refrigeration cycle 4, and an air conditioner controller 5.

The duct 2 constitutes an air passage according to the present invention, and the inside air intake ports 6 and 7 and the outside air intake port 8 are formed on the upstream side of the air. Further, an inside / outside air switching door 9 is provided between the inside air inlet 6 and the outside air inlet 8 so as to be rotatable between a solid line position and a broken line position in the figure. When the inside / outside air switching door 9 is in the solid line position in the figure, the outside air is introduced into the duct 2, and when it is in the broken line position in the figure, the inside air is sucked into the duct 2. Further, the inside / outside air switching door 9 is opened / closed by an opening / closing drive means 15 (specifically, a servomotor) for the door. Further, the inside air suction port 7 is always open.

At the end of the duct 2 on the downstream side of the air, a defroster outlet 2a for discharging blast air toward the window glass of the vehicle, a face outlet 2b for discharging blast air toward the upper body of the occupant, and an occupant To a foot outlet 2c that discharges blown air toward the feet of Each of the outlets 2a to 2c is selectively opened and closed by an outlet switching door (not shown) that operates according to the outlet mode.

The refrigeration cycle 4 includes a compressor 10, an outdoor heat exchanger 11, a cooling decompression means 12, a heating decompression means 13,
The indoor heat exchanger 14, the accumulator 16, and the four-way valve 17 as the refrigerant flow path switching means are respectively provided with the refrigerant pipe 31.
Connected by the well-known. The compressor 10 sucks, compresses, and discharges the refrigerant, and is driven by an electric motor 32 (see FIG. 2) incorporated therein. The electric motor 32 is driven by receiving electric power from the vehicle running battery 33 (see FIG. 2), and the rotation speed is determined according to the frequency variably controlled by the inverter 19. Therefore, the refrigerant discharge capacity of the compressor 10 is equal to the electric motor 32.
Changes according to the rotation speed of.

The outdoor heat exchanger 11 is a heat exchanger which is disposed outside the duct 2 (outside the passenger compartment) and receives air from the outdoor fan 20 to exchange heat between the outside air and the refrigerant. This outdoor heat exchanger functions as a condenser during cooling operation and as an evaporator during heating operation. Cooling decompression means 12
Is for decompressing and expanding the refrigerant from the outdoor heat exchanger 11 during the cooling operation, and is specifically composed of a capillary tube.

The heating decompression means 13 decompresses and expands the refrigerant from the indoor heat exchanger 14 during the heating operation, and is specifically composed of a capillary tube. The indoor heat exchanger 14 is arranged inside the duct 2 and is provided with the blower 3
The heat exchanger exchanges heat between the air in the duct 2 and the refrigerant by receiving the air blown from. The indoor heat exchanger 14 functions as an evaporator during cooling operation and as a condenser during heating operation.

The accumulator 16 temporarily stores the excess refrigerant in the refrigeration cycle 4 and sends out only the gas refrigerant so that the compressor 10 does not suck the liquid refrigerant. Further, the refrigeration cycle 4 is provided with a bypass passage bypassing the cooling decompression means 12 and a bypass passage bypassing the heating decompression means 13, and the check valve 24 and the check valve in the middle of each bypass passage. 23 are provided.

The four-way valve 17 switches the flow of the refrigerant as follows depending on the cooling operation and the heating operation. (During cooling operation) The high temperature and high pressure refrigerant discharged from the compressor 10 is
The four-way valve 17-> the outdoor heat exchanger 11-> the check valve 23-> the cooling decompression means 12-> the indoor heat exchanger 14-> the four-way valve 17-> the accumulator 16-> the compressor 10 (indicated by arrow C in the figure). Thereby, the indoor heat exchanger 14 functions as an evaporator, and the air in the duct 2 is cooled by the indoor heat exchanger 14.

(During heating operation) The high-temperature high-pressure refrigerant discharged from the compressor 10 is supplied to the four-way valve 17 → indoor heat exchanger 14 → check valve 2
4-> depressurizing means 13 for heating-> outdoor heat exchanger 11-> four-way valve 1
Flow in the order of 7 → accumulator 16 → compressor 10 (indicated by arrow H in the figure). Thereby, the indoor heat exchanger 14 functions as a condenser, and the air in the duct 2 is heated by the indoor heat exchanger 14.

Next, the control device 5 will be described. As shown in FIG. 2, the control device 5 has interfaces 51, C
A blower means that incorporates a microcomputer including a PU 52, a ROM 53, a RAM 54, and the like, based on an operation signal output from the air conditioner operation panel 25, a sensor signal from each of the sensors 26 to 31 described later, and a signal from the wiper switch 32. 3, outdoor fan 20, four-way valve 17,
The servomotor 15 and other actuators are energized and controlled.

As the above-mentioned sensors, a solar radiation sensor 26 for detecting the amount of solar radiation Ts applied to the vehicle interior, an indoor temperature sensor 27 for detecting the vehicle interior temperature Tr, and an outside air temperature Tam.
Temperature sensor 28 for detecting the temperature, relative humidity RH in the passenger compartment
The indoor relative humidity sensor 29 for detecting r, the pressure sensor 30 for detecting the refrigerant pressure Pc ′ on the discharge side of the compressor 10, and the suction temperature sensor 31 for detecting the air temperature Tin on the suction side of the indoor heat exchanger 14 are used. Has been.

Next, the operation of the air conditioner control device 5 for controlling the rotation speed of the compressor 10 during the heating operation will be described based on the flowchart shown in FIG. First, step 1
At 00, the air conditioner operation panel 25, each sensor 26 to
31 and the signal from the wiper switch 32 are read. Next, at step 110, the air conditioner operation panel 25
From the set temperature Tset in the vehicle compartment set in step 1 and the values of the respective sensors (vehicle interior temperature Tr, outside air temperature Tam, insolation Ts), the target outlet temperature of the air blown into the vehicle compartment ( (Hereinafter referred to as TAO).

[0031]

## EQU1 ## TAO = Kset × Tset−Kr × Tr−Kam ×
Tam-Ks * Ts + C Here, Kset, Kr, Kam, and Ks are gains, respectively, and C is a correction constant.

Next, at step 120, the saturated refrigerant temperature Tc is obtained from the above TAO and the suction temperature Tin based on the following equation (2).

[0033]

## EQU00002 ## Tc = (TAO-Tin) /. Phi. (V) + Tin Here, .phi. (V) is a temperature efficiency which varies depending on the air volume V of the blowing means 3, and the relationship between this temperature efficiency .phi. (V) and the air volume V is This is as shown in FIG. The data shown in FIG. 4 is RO in advance.
It is stored in M53.

Then, in step 130, RO
Based on the data shown in FIG. 5 stored in M53, the saturation pressure Pc corresponding to the saturated refrigerant temperature Tc calculated in step 120 is obtained. Then, in step 140, a rotation speed control signal is output to the inverter 19 to control the rotation speed of the compressor 10 so that Pc 'detected by the pressure sensor 30 becomes the saturation pressure Pc.

That is, from the compressor 10 to the indoor heat exchanger 14
Since the pressure loss up to is small, the saturation pressure Pc can be regarded as substantially equal to the discharge pressure (= Pc ') of the compressor 10. Therefore, the saturated refrigerant temperature Tc calculated in step 120 can be obtained by controlling the rotational speed of the compressor 10 so that Pc 'becomes Pc. And, the indoor heat exchanger 1 whose sawtooth saturated refrigerant temperature Tc serves as a condenser
Since it is closely related to the temperature of the air heated by 4 and blown out into the vehicle compartment, the pressure detected by the pressure sensor 30 (the discharge pressure of the compressor 10) Pc 'is a physical quantity related to the blown air temperature.

Next, the air conditioner control device 5 for performing anti-fog control
The operation will be described based on the flowchart shown in FIG. First, in step 200, it is determined whether or not the wiper switch 32 is turned on. That is, it is determined whether it is raining. If it is determined that the wiper switch 32 is turned on, then in step 210
The inner temperature Tgi of the window glass is calculated based on

[0037]

## EQU00003 ## Tgi = 0.04Tf + 0.03Tr + 0.93Tam where Tf is the temperature indicating the temperature of the air blown from the defroster outlet 2a, and is calculated back from the value of the pressure sensor 30 using the relationship of FIG. It is calculated as a value obtained by subtracting the heat loss in the duct 2 from the measured temperature. In this way, the temperature of air blown out from the defroster outlet 2a is obtained from the value of the pressure sensor 30. The above-mentioned blown air temperature has a correlation with the temperature of the indoor heat exchanger 14, and by extension, the value of the pressure sensor 30. Because. Further, the mathematical formula 3 and the mathematical formula 4 described later are formulas that are derived assuming that the vehicle speed is 100 km / h.

If it is determined in step 200 that the wiper switch 32 is not turned on, step 220
Then, the window glass inner surface temperature Tgi is calculated based on the following Equation 4.

[0039]

## EQU00004 ## Tgi = 0.13Tf + 0.11Tr + 0.76Tam Then, in the next step 230, the window glass inner surface temperature T calculated in the above step 210 or step 220.
The saturated absolute humidity Xgi corresponding to gi is calculated from the relationship shown in FIG. The relationship shown in FIG. 7 is generally called a moist air diagram, and is based on the assumption that the relative humidity is 100%. In addition, this relationship is previously stored in the ROM 53.
Is stored in

Next, at step 240, first, the absolute humidity Xr 'in the vehicle interior when the relative humidity is 100% is obtained from the vehicle interior temperature Tr and the relationship shown in FIG. 7, and this Xr' and the relative humidity RHr are obtained. Then, the absolute humidity Xr in the vehicle compartment is calculated based on the following mathematical expression 5.

[0041]

## EQU5 ## Xr = Xr '× RHr / 100 × 10 ^-3 (kg
/ Kg ') Then, in the next step 250, it is determined whether or not Xr> 0.9Xgi. Then, if YES, it is considered that the window glass is likely to be fogged, and the servo motor 15 is controlled in step 260 so that the outside air introduction amount increases. On the other hand, if NO, it is considered that the window glass is less likely to be fogged, and the servo motor 15 is controlled in step 270 so that the outside air introduction amount is reduced.

Here, in step 250, it is not determined whether Xr> Xgi, but whether Xr> 0.9Xgi is determined because the window glass is defog-proof. Even if the amount of introduced outside air is increased, the antifogging effect does not immediately appear, so that it is possible to allow the antifogging control to have a margin by determining whether or not Xr> 0.9Xgi.
However, it may be determined whether or not Xr> Xgi. In short, in steps 250 and 260,
The external air introduction amount may be increased when Xr is larger than Xgi.

Further, step 260 and step 270.
Then, the outside air introduction amount is controlled to change by 25%. Note that each of the above steps constitutes means for realizing each function. As described above, in this embodiment,
In order to calculate the inner temperature of the window glass, the temperature of the air blown out from the defroster outlet 2a is considered in addition to the vehicle interior temperature and the outside air temperature, so that the inner temperature of the window glass can be calculated accurately. Therefore, the electric power of the traveling battery 33 consumed for the antifogging of the window glass can be minimized.

Moreover, since the temperature of the air blown from the defroster outlet 2a is obtained by the pressure sensor 30, means such as a sensor for detecting the temperature of the air blown from the defroster outlet 2a is separately provided at the defroster outlet 2a. No need to provide. In addition, in the present embodiment, the calculation result of the window glass inner surface temperature is different when it is raining and when it is not raining. As a result, the temperature inside the window glass can be calculated more accurately.

(Other Embodiments) In the above embodiment, the indoor heat exchanger 14 functions as a condenser to heat the air blown into the passenger compartment, but the air is not necessarily heated directly in the condenser. No need. For example, as shown in FIG. 8, a heater core 61 as a heater may be arranged in the duct 2 and the hot water flowing into the heater core 61 may be heated by the condenser.

That is, in this embodiment, the refrigerant-hot water heat exchanger 62 exchanges heat between the condensation heat of the refrigerant in the condenser 14 and the hot water in the hot water pipe 63 to heat the hot water. Then, the heated hot water is guided into the heater core 61, and the amount of air flowing into the heater core 61 is adjusted by the air mix doors 64 and 65, so that the temperature of the air blown out from the air outlets 2a to 2c is adjusted to an appropriate temperature. To adjust.

In this embodiment, in addition to warm water heating by the heat of condensation of the condenser 14, warm water heating by the combustion heater 66 is also performed. The combustion type heater 66 includes a combustion tank 67.
The hot water is heated by burning the fuel inside. The amount of hot water heated by the combustion heater 66 and the amount of hot water heated by the heat of condensation are adjusted by hot water valves 68 and 69.

In the present embodiment, the temperature of the air passing through the heater core 61 is indirectly detected based on the detection value of the water temperature sensor 70 as the hot water temperature detecting means installed on the hot water pipe 63. Here, since the temperature of the heater core 61 is directly related to the detection value of the water temperature sensor 70, if the heat exchange efficiency in the heater core 61 and the opening degrees of the air mix doors 64 and 65 are taken into consideration, the defroster outlet 2a.
It is possible to uniquely determine the temperature of the air blown from the.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of a control system of the above embodiment.

FIG. 3 is a control flowchart of the above embodiment.

FIG. 4 is a graph showing the relationship between the air volume V and the temperature efficiency φ (V).

FIG. 5 is a graph showing the relationship between saturation temperature Tc and high pressure Pc.

FIG. 6 is a control flowchart of the above embodiment.

FIG. 7 is a graph showing the relationship between temperature and absolute humidity.

FIG. 8 is an overall configuration diagram of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air-conditioner 2 Duct (air passage) 2a Defroster blower outlet 3 Blower means 4 Refrigeration cycle 5 Control device 8 Outside air inlet 61 Heater core (heater) 62 Refrigerant-hot water heat exchanger 70 Water temperature sensor (hot water temperature detecting means)

Claims (4)

[Claims] 1. A blower for generating an air flow, an air passage for guiding the air from the blower into a vehicle compartment, and a rotor that rotates in response to electric power supplied from a vehicle running battery. , A compressor for performing compression and discharge, a condenser for condensing the refrigerant discharged by the compressor, a pressure reducing means for reducing the pressure of the refrigerant from the condenser, and a refrigerant downstream side of the pressure reducing means of the compressor. An evaporator provided on the suction side for evaporating the refrigerant from the pressure reducing means, a physical quantity detecting means for detecting a physical quantity related to the condensation heat of the condenser, and a target outlet temperature for calculating a target outlet temperature into the vehicle interior. Comprising a calculating means, the air in the air passage is configured to be heated by the heat of condensation of the condenser, the target outlet temperature calculated by the target outlet temperature calculating means, and the physical quantity An air conditioner for an electric vehicle including power control means for controlling the electric power supplied from the battery to the compressor so that the temperature of the air blown into the passenger compartment becomes the target air temperature, based on the physical quantity detected by the detection means. An apparatus for driving the outside air intake opening and closing means for opening and closing the outside air intake opening, which is formed at an air upstream side portion of the air passage and communicates with the outside of the vehicle, and drives the outside air intake opening and closing means. Opening / closing drive means, a defroster outlet for blowing out the air heated by the heat of condensation toward the window glass of the automobile, which is formed in the downstream side portion of the air passage, and a passenger compartment temperature for detecting the temperature in the passenger compartment. A detection means, an outside air temperature detection means for detecting the temperature of the outside air, a relative humidity detection means for detecting the relative humidity in the vehicle interior, and a temperature detected by the vehicle interior temperature detection means. A window glass surface temperature calculating means for calculating a surface temperature of the window glass on the basis of a vehicle interior temperature, an outside air temperature detected by the outside air temperature detecting means, and a physical quantity detected by the physical quantity detecting means; A saturated absolute humidity calculating means for calculating a saturated absolute humidity corresponding to the window glass surface temperature calculated by the surface temperature calculating means, a vehicle interior temperature detected by the vehicle interior temperature detecting means, and a relative humidity detecting means Based on the relative humidity calculated, the absolute humidity calculating means for calculating the absolute humidity inside the vehicle, the vehicle absolute humidity calculated by the absolute humidity calculating means, the saturated absolute calculated by the saturated absolute humidity calculating means When the outside air inlet opening / closing means increases the rate of opening the outside air inlet when the humidity is higher than the humidity, And an opening / closing control means for controlling the opening / closing drive means so as to reduce the rate at which the outside air intake opening / closing means opens the outside air intake opening when the calculated absolute humidity in the vehicle compartment is lower than the calculated saturated absolute humidity. An air conditioner for an electric vehicle, comprising: 2. The condenser is arranged in the air passage, and the physical quantity detecting means is a high pressure detecting means for detecting a high pressure on the discharge side of the compressor. Air conditioning system for electric vehicles. 3. A heater provided with hot water heated by the heat of condensation flowing therein, wherein the heater is arranged in the air passage, and the physical quantity detecting means supplies hot water to the heater. The air conditioner for an electric vehicle according to claim 1, which is hot water temperature detecting means for detecting a temperature. 4. A rain condition determining means for determining a rain condition is provided, wherein the window glass surface temperature calculating means is determined to be in a rain condition more than when the rain condition determining means determines that it is not a rain condition. The air-conditioning system for an electric vehicle according to claim 1, wherein the surface temperature of the window glass is calculated to be lower when the above condition occurs.