JP4310900B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner used in a vehicle provided with a partition portion provided in a portion facing a vehicle cabin space and capable of switching between communication and blocking between the cabin space and the outside of the cabin. It is suitable when applied to a vehicle air conditioner used in an open car.
[0002]
[Prior art]
Conventionally, in the vehicle air conditioner as described above, the inside / outside air mode is controlled based on the target blowing temperature TAO as the environmental condition outside the vehicle interior or the gas concentration in the air outside the vehicle interior.
[0003]
[Problems to be solved by the invention]
However, in the vehicle air conditioner as described above, since it is affected by the ram pressure in the outside air mode, there arises a problem that the amount of air blown into the passenger compartment varies depending on the vehicle speed.
[0004]
In order to solve the above problem, it is conceivable to set the inside air mode. However, in a state where the partition portion blocks the passenger compartment space from the outside of the passenger compartment (for example, when the open car hood is closed), the ventilation of the passenger compartment space is performed. A new problem will occur that will not be possible.
[0005]
Therefore, an object of the present invention is to solve the above problems.
[0006]
[Means for solving the problems]
As a result of studies to achieve the above object, the inventor of the present invention, in a vehicle including a partition portion that can be switched between communication and blocking between the passenger compartment space and the outside of the passenger compartment, this partition portion is defined as the passenger compartment space. Focusing on the fact that the cabin space can be ventilated even when the inside / outside air mode is set to the inside air mode when communicating with the outside of the passenger compartment.
[0007]
The inventions according to claims 1 to 4 made on the basis of the above fact are provided in a portion facing the vehicle cabin space (100) so that the communication between the cabin space (100) and the outside of the cabin can be switched. Used in a vehicle which is an open car provided with a partition portion (200) formed of a hood, and is provided with an inside air inlet (4) for sucking air in the passenger compartment, an outside air inlet (3) for sucking air outside the passenger compartment, Inside / outside air opening / closing means (5) for opening and closing the suction ports (3, 4), and inside / outside air mode determining means (S120, S140, S140a, S220, S230, S240, S250, S280) and the inside / outside air mode determined by the inside / outside air mode determining means (S120, S140, S140a, S220, S230, S240, S250, S280). A moving vehicle air-conditioning apparatus provided with inner and outer air control means (S150, S290) for controlling the air opening and closing means (5),
A partition part switching state detecting means (36, S130) for detecting the switching state of the partition part (200) is provided, and the inside / outside air mode determining means (S120, S140, S140a, S220, S230, S240, S250, S280) are partitioned. part sometimes switching state detecting means (36, S130) detects that communicates the with exterior room space (100), maintaining the voltage applied to the blower motor (8) for driving the air blowing means (7) However, the inside / outside air mode determined based on the environmental conditions inside and outside the vehicle interior is canceled, and the inside air mode is determined in which the inside air inlet (4) is opened and the outside air inlet (3) is closed. Yes.
[0008]
Thereby, when the partition part (200) is in the communication state, the cabin space (100) is ventilated by forcibly controlling to the inside air mode, and air is blown into the cabin space (100) regardless of changes in the vehicle speed. The air volume can be kept constant. Moreover, when the partition part (200) is in the shut-off state, the inside / outside air mode can be controlled based on the environmental conditions inside and outside the vehicle interior at that time.
[0009]
By the way, when the hood (200) is opened in the open car (100), the vehicle speed wind flows from the rear to the front of the passenger compartment space (10), so that this flow causes the openings (20, 21, 23). A phenomenon occurs in which the flow of air that is blown out toward the passenger in the cabin is blocked, making it difficult to reach the passenger.
[0010]
On the other hand, according to the inventions of the first to fourth aspects, when the hood (200) of the open car (100) is opened, the inside air mode is forcibly set to a larger amount of blown air than the outside air mode. The phenomenon can be suppressed as much as possible.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, a first embodiment in which the present invention is applied to a vehicle air conditioner used in an open car will be described with reference to FIGS. 1 is a view showing a state of the open car when the roof 200 (top) is closed in the present embodiment, FIG. 2 is a view showing a state of the roof 200 being opened, and FIG. 3 is a vehicle air conditioner in the present embodiment. FIG. 4 is a flowchart showing a control process performed by the microcomputer according to the present embodiment. FIG. 5 is a map for determining the inside / outside air mode in step S120 of FIG.
[0012]
The open car shown in FIGS. 1 and 2 is provided with a roof 200 at a portion facing the vehicle cabin space 100, and the roof 200 can be selectively opened and closed by the operation of the occupant. The operation of this occupant will be described later.
[0013]
Next, the configuration of the air conditioning unit 1 of the vehicle air conditioner in the present embodiment will be described with reference to FIG.
[0014]
As shown in FIG. 3, the air conditioning unit 1 includes an air conditioning case 2 that forms an air passage to the cabin space 100. An upstream side portion of the air conditioning case 2 is provided with an outside air suction port 3 for sucking air outside the passenger compartment, an inside air suction port 4 for sucking air inside the passenger compartment, and an inside / outside air switching door 5 for opening and closing both the suction ports 3 and 4. ing. The inside / outside air switching door 5 is driven by a servo motor 6 as its driving means.
[0015]
Further, a fan 7 is provided on the downstream side of the inside / outside air switching door 5 as a blowing means for generating an air flow. The fan 7 is driven by a blower motor 8 as its driving means. The blower motor 8 is driven at a predetermined rotational speed by receiving a control signal via the blower drive circuit 9.
[0016]
On the downstream side of the fan 7, an evaporator 10 is provided as a cooling heat exchanger that dehumidifies and cools the air sucked from the suction ports 3 and 4 selected by the inside / outside air switching door 5. The evaporator 10 is a cooling heat exchanger that constitutes a refrigeration cycle 15 together with a compressor 11 that compresses refrigerant, a condenser 12 that condenses the refrigerant, a receiver 13 as a gas-liquid separator, and an expansion valve 14 that decompresses the refrigerant. The compressor 11 is driven by the driving force of the engine (not shown) transmitted through the compressor driving circuit 16 when an electromagnetic clutch (not shown) is energized.
[0017]
Further, on the downstream side of the evaporator 10, a heater core 17 as a heating heat exchanger for heating the air that has passed through the evaporator 10 and an air mix door 18 as a temperature adjusting means are provided. The heater core 17 is a heat exchanger for heating using the cooling water of the engine as a heat source.
[0018]
Further, the air mix door 18 adjusts the air flow rate to the passenger compartment space 100 by adjusting the air volume ratio passing through the heater core 17 and the air volume ratio bypassing the heater core 17 in the cold air passing through the evaporator 10. It has become. The air mix door 18 is driven by a servo motor 19 as its drive means.
[0019]
At the air downstream end of the air conditioning case 2, there are a face opening 20 that blows wind to a position corresponding to the upper body of the passenger, a foot opening 21 that blows wind toward the passenger's feet, and an inner surface of the window glass 22. Defroster openings 23 for blowing wind toward each other are provided.
[0020]
A face door 24 that opens and closes the face opening 20, a foot door 25 that opens and closes the foot opening 21, and a defroster door 26 that opens and closes the defroster opening 23 are provided upstream of the openings 20, 21, and 23, respectively. Yes. The face door 24, the foot door 25, and the defroster door 26 are driven by servo motors 27, 28, and 29 as driving means, respectively.
[0021]
Next, the control system of this embodiment will be described.
[0022]
Although not shown, the control device 30 is provided with a well-known microcomputer including a CPU, ROM, RAM, and the like, an A / D conversion circuit, and the like.
[0023]
When an ignition switch (not shown) is turned on, the control device 30 is supplied with electric power from a battery (not shown) and is activated.
[0024]
An input terminal of the control device 30 includes an outside air temperature sensor 31 that detects the temperature outside the passenger compartment, an inside air temperature sensor 32 that detects the air temperature in the cabin space 100, and a solar radiation sensor 33 that detects the amount of solar radiation in the cabin space 100. A post-evaporation sensor 34 that detects an air temperature immediately after passing through the evaporator 10 (hereinafter referred to as a post-evaporation temperature), a water temperature sensor 35 that detects the temperature of the engine cooling water, and a roof switch that allows the occupant to set the open / close state of the roof 200 36. Each signal is input from a temperature setting switch 37 for the passenger to set the passenger compartment temperature, a defroster switch 38 for the passenger to set the outlet mode to the defroster mode, and the like.
[0025]
Here, the roof switch 36 is configured to open the roof 200 when operated by the occupant while the roof 200 is closed, and to close the roof 200 when operated by the occupant while the roof 200 is open. In addition, this roof switch 36 is provided in the position (for example, on an instrument panel) which a passenger | crew can operate favorably in the passenger compartment space 100.
[0026]
In the present embodiment, the temperature detecting means and the temperature setting means in claim 2 are constituted by an internal air temperature sensor 32 and a temperature setting switch 37, respectively.
[0027]
Signals from the sensors 31 to 35, the switches 36 to 38, and the like are configured to be A / D converted by the A / D conversion circuit and then input to the microcomputer. The microcomputer is configured to perform arithmetic processing on each signal based on a predetermined program.
[0028]
Then, control signals from the output terminal of the control device 15 to the blower motor 8, servo motors 6, 19, 27 to 29, the electromagnetic clutches and the like (hereinafter collectively referred to as actuators) corresponding to the calculation processing result are sent. It is configured to be output.
[0029]
Next, control processing performed by the microcomputer will be described with reference to the flowchart of FIG.
[0030]
When the routine of FIG. 4 starts, first, input signals from the sensors 31 to 35, the switches 36 to 38, etc. are read in step S100.
[0031]
In the next step S110, a target blowing temperature TAO to be blown out to the passenger in the cabin is calculated based on the following formula 1 stored in advance in the ROM.
[0032]
[Expression 1]
TAO = Kset × Tset−Kam × Tam−Kr × Tr−Ks × Ts + C (° C.)
Here, Tset is the set temperature set by the occupant using the temperature setting switch 37, Tam is the outside air temperature detected by the outside air temperature sensor 31, Tr is the inside air temperature detected by the inside air temperature sensor 32, and Ts is the solar radiation sensor 33. The amount of solar radiation detected. Kset, Kr, Kam, and Ks are gains, and C is a constant.
[0033]
In the next step S120, the control signal to each actuator is determined as follows. Specifically, the inside / outside air mode, ON / OFF of the compressor 11, the voltage applied to the blower motor 8, the opening degree of the air mix door 18, and the outlet mode are determined.
[0034]
The inside / outside air mode is determined based on the target blowing temperature TAO from the map shown in FIG. In the present embodiment, the inside air mode is a mode in which the opening degree of the inside / outside air switching door 5 is 0% (the outside air suction port 3 is fully closed and the inside air suction port 4 is fully opened), and the semi-inside air mode is the mode of the inside / outside air switching door 5. The mode in which the opening degree is 30% to 80% and the outside air mode are modes in which the opening degree of the inside / outside air switching door 5 is 100% (the outside air inlet 3 is fully open and the inside air inlet 4 is fully closed).
[0035]
Then, when the window glass 22 is likely to be fogged, such as in winter, the target air temperature TAO calculated in step S110 is increased, so that the outside air mode is determined from the map of FIG.
[0036]
The compressor 11 is determined to be turned on / off based on the post-evaporation temperature from a map (not shown).
[0037]
The applied voltage to the blower motor 8 is determined based on the target blowing temperature TAO from a map (not shown).
[0038]
The opening degree SW of the air mix door 18 is calculated based on the following formula 2 stored in advance in the ROM.
[0039]
[Expression 2]
SW = (TAO−Te) × 100 / (Tw−Te) (%)
Here, Te is the post-evaporation temperature detected by the post-evaporation sensor 34, and Tw is the temperature of the engine cooling water detected by the water temperature sensor 35.
[0040]
As the outlet mode, one of a face mode, a bi-level mode, a foot mode, and a foot defroster mode is determined based on the target outlet temperature TAO from a map (not shown). However, when the defroster switch 38 is ON, the defroster mode is set.
[0041]
In step S130, it is determined whether the roof 200 is open based on the operation signal of the roof switch 36. If it determines with YES, it will move to step S140, and if it determines with NO, it will move to step S150.
[0042]
In step S140, the inside / outside air mode is forcibly determined to be the inside air mode, and the compressor 11 is forcibly turned off.
[0043]
In step S150, each actuator is controlled based on the control signal determined in steps S120 and S140.
[0044]
According to this embodiment described above, when the roof 200 is in the open state, the cabin space 100 is ventilated to prevent the window glass 22 from being fogged and to change the vehicle speed. Regardless of this, the amount of air blown into the guest room space 100 can be made constant.
[0045]
Further, when the roof 200 is in the closed state, the inside / outside air mode is determined based on the target blowout temperature TAO at that time, so that the window space 22 is controlled to the outside air mode in winter when the window glass 22 is easily cloudy. The window glass 22 is defogged by being ventilated.
[0046]
Further, when the roof 200 is in an open state (when the cabin space 100 is ventilated and the window glass 22 is not easily fogged), the compressor 11 is forcibly turned off in step S140, so that the compressor 11 is unnecessary. This compressor 11 is reliably turned off, which can contribute to improvement in vehicle fuel consumption.
[0047]
(Second Embodiment)
Next, a second embodiment of the present invention will be described. The present embodiment is different from the first embodiment in the processing after step S130 in FIG. 4. Hereinafter, differences from the first embodiment will be described with reference to FIG. In FIG. 6, the same processes as those in FIG.
[0048]
First, if YES is determined in step S130, the process proceeds to step S140a, and if NO is determined, the process proceeds to step S150.
[0049]
In step S140a, the inside / outside air mode determined in step S120 is canceled to forcibly enter the inside air mode, and the process proceeds to next step S140b.
[0050]
In step S140b, it is determined whether or not the target outlet temperature TAO calculated in step S110 is equal to or lower than a predetermined value TAOc (for example, 20 ° C.). If it is determined NO in step S140b, the compressor 11 is turned on in step S140c to cool the cabin 100, and if it is determined YES, the compressor 11 is turned off.
[0051]
According to the present embodiment, when the target outlet temperature TAO is equal to or lower than the predetermined value TAOc, the compressor 11 is turned on in step S140c, so that the cabin space 100 can be cooled as necessary.
[0052]
(Third embodiment)
Next, a third embodiment of the present invention will be described. In addition, this embodiment adds the well-known exhaust gas inside / outside air control with respect to the said 1st Embodiment, Hereinafter, the difference is demonstrated using FIG.
[0053]
FIG. 7 is a view corresponding to FIG. 1 in the present embodiment. In FIG. The gas sensor 39 is provided in a portion (for example, a vehicle front grill) where the gas concentration can be satisfactorily detected by contacting the outside air in the vehicle.
[0054]
Next, the control process of this embodiment is demonstrated using the flowchart of FIG.
[0055]
When the routine of FIG. 8 starts, first, input signals from the sensors 31 to 35, 39, the switches 36 to 38, etc. are read in step S200.
[0056]
In step S210, the target blowing temperature TAO is calculated based on the above mathematical formula 1. In the next step S220, it is determined whether or not the target blowing temperature TAO is equal to or less than a predetermined value TAOr.
[0057]
If YES is determined in step S220, the inside / outside air mode is changed to the inside air mode in step S230, and if NO is determined, the process proceeds to step S240.
[0058]
In step S240, it is determined whether or not the gas concentration detected by the gas sensor 39 is equal to or greater than a predetermined value A. If YES is determined, the process proceeds to step S230. If NO is determined, the inside / outside air mode is changed to the outside air mode in step S250. And In this embodiment, known exhaust gas inside / outside air control for controlling the inside / outside air mode based on the gas concentration detected by the gas sensor 39 is performed in steps S230, S240, S250, and S290 described later.
[0059]
In step S260, ON / OFF of the compressor 11, the voltage applied to the blower motor 8, the opening of the air mix door 18, and the outlet mode are determined in the same manner as in step S120 of FIG.
[0060]
In step S270, it is determined whether or not the roof 200 is open in the same manner as in step S130 of FIG. 4. If YES is determined, the process proceeds to step S280, and if NO is determined, the process proceeds to step S290.
[0061]
In step S280, the inside / outside air mode is forcibly determined to be the inside air mode, and in step S290, each actuator is controlled based on the control signals determined in steps S230, S250, S260, and S280.
[0062]
According to the present embodiment described above, when the roof 200 is in the open state, the cabin space 100 is ventilated by forcibly controlling the inside air mode, and the amount of air blown into the cabin space 100 regardless of changes in the vehicle speed. Can be made constant.
[0063]
In addition, when the roof 200 is in the closed state, the inside / outside air mode is determined based on the gas concentration of the air outside the passenger compartment at that time. Therefore, when the gas concentration is low, the cabin space 100 is ventilated by controlling to the outside air mode. When the concentration is high, the inside air mode is controlled to prevent contaminated air from entering the cabin space 100.
[0064]
(Other embodiments)
In the first to third embodiments, the partition portion in claim 1 has been described as the roof 200 of the open car, but is not limited thereto, and may be, for example, a side glass or a sunroof in a normal vehicle.
[0065]
In the first to third embodiments, the inside air mode is set so that the opening degree of the inside / outside air door 5 is 0%, that is, the inside air inlet 4 is fully opened and the outside air inlet 3 is fully closed. Instead, some outside air may be mixed. In short, it is only necessary that the inside air is inhaled.
[0066]
Moreover, in the said 1st, 2nd embodiment, although the temperature detection means in Claim 2 is comprised by the internal temperature sensor 32, it is not restricted to this, For example, it is provided in the ceiling site | part of the passenger room 100, and a passenger | crew's skin You may comprise with the infrared sensor etc. which detect temperature.
[0067]
Moreover, in the said 1st-3rd embodiment, although the opening / closing state of the roof 200 is detected by the operation signal of the roof switch 36 in step S130, it is not restricted to this, For example, the opening / closing state of the roof 200 is detected. A sensor may be provided, and the detection signal of this sensor may be used.
[0068]
In the first embodiment, the compressor 11 is forcibly turned off in step S140. However, this process may not be performed.
[0069]
In the third embodiment, the inside air mode is set when the target blowing temperature TAO is equal to or lower than the predetermined value TAOd in step S220, and the exhaust gas inside / outside air control is performed when the target blowing temperature TAO is equal to or higher than the predetermined value TAOd. The exhaust gas inside / outside air control may be performed directly without performing the treatment.
[Brief description of the drawings]
FIG. 1 is a diagram showing a state when a roof 200 of an open car is closed in first to third embodiments of the present invention.
FIG. 2 is a view showing a state when the roof 200 of the open car in the first to third embodiments is opened.
FIG. 3 is an overall configuration diagram of the vehicle air conditioner according to the first and second embodiments.
FIG. 4 is a flowchart showing a control process performed by the microcomputer in the first embodiment.
FIG. 5 is a map for determining the inside / outside air mode in step S120 of FIGS. 4 and 6;
FIG. 6 is a flowchart showing a control process performed by the microcomputer in the second embodiment.
FIG. 7 is a view corresponding to FIG. 3 in the third embodiment.
FIG. 8 is a view corresponding to FIG. 4 in the third embodiment.
[Explanation of symbols]
2 ... air conditioning case,
3 ... Outside air inlet,
4 ... Inside air inlet,
5 ... Inside / outside air switching door (inside / outside air switching means),
7: Fan (air blowing means),
20: Face opening (opening),
21 ... Foot opening (opening),
23: Defroster opening (opening),
32. Inside air temperature sensor (inside air temperature detecting means),
36 ... Roof switch (partition switching state detection means),
37. Temperature setting switch (temperature setting means),
39 ... Gas sensor (gas concentration detection means),
100 ... Room space,
200: Roof (partition, hood).

Claims (4)

Used in a vehicle provided with a partition portion (200) provided in a portion facing the vehicle cabin space (100) and capable of switching between communication and blocking between the cabin space (100) and the outside of the cabin,
An air conditioning case (2) forming an air passage to the cabin space (100);
A blowing means (7) provided in the air conditioning case (2) for generating an air flow;
A blower motor (8) for driving the blowing means (7);
An inside air inlet (4) for sucking air in the passenger compartment into the air conditioning case (2);
An outside air inlet (3) for sucking outside air into the air conditioning case (2);
Inside / outside air opening / closing means (5) for opening and closing both suction ports (3, 4);
An opening (20, 21, 23) provided at an air downstream end of the air-conditioning case (2) and blowing out air to the cabin space (100);
Inside / outside air mode determining means (S120, S140, S140a, S220, S230, S240, S250, S280) for determining the inside / outside air mode based on the environmental conditions inside and outside the vehicle interior;
Inside / outside air control means (S150, S290) for controlling the inside / outside air opening / closing means (5) based on the inside / outside air mode determined by the inside / outside air mode determining means (S120, S140, S140a, S220, S230, S240, S250, S280). In a vehicle air conditioner equipped with
Partition part switching state detection means (36, S130) for detecting the switching state of the partition part (200);
The vehicle is an open car, and the partition (200) is a hood (200) of the open car,
In the inside / outside air mode determining means (S120, S140, S140a, S220, S230, S240, S250, S280), the partition switching state detecting means (36, S130) communicates the cabin space (100) with the outside of the passenger compartment. When it is detected that the internal air / air mode determined based on the environmental conditions inside and outside the vehicle interior is canceled while the applied voltage to the blower motor (8) is maintained, the internal air inlet (4) The air conditioner for vehicles is determined to be an inside air mode in which the outside air inlet (3) is closed by opening the outside air. A temperature setting means (37) for a passenger to set the temperature of the cabin space (100);
An inside air temperature detecting means (32) for detecting the air temperature of the passenger compartment space (100),
The inside / outside air mode determining means (S120, S140, S140a, S220) includes at least a set temperature set by the temperature setting means (37) as an environmental condition outside the vehicle interior, and the inside air temperature detecting means (32 2. The vehicle air conditioner according to claim 1, wherein the inside / outside air mode is determined based on the inside air temperature detected in (1). Gas concentration detection means (39) for detecting the gas concentration in the air outside the passenger compartment,
The inside / outside air mode determining means (S230, S240, S250, S280) determines an inside / outside air mode based on the gas concentration detected by the gas concentration detecting means (39). The vehicle air conditioner described. A compressor (11) for compressing refrigerant that constitutes a refrigeration cycle together with an evaporator (10) provided in the air conditioning case (2);
A control device (30) forcibly stopping the compressor (11) when the partition switching state detecting means (36, S130) detects that the cabin space (100) communicates with the outside of the passenger compartment. And the vehicle air conditioner according to any one of claims 1 to 3.

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