JP2841507B2 - Dual air conditioner for vehicles - Google Patents

Description

The present invention relates to a dual type air conditioner for a vehicle, and in particular, a rear seat side having a function for cooling a vehicle interior and for cooling a cooler box, and a function as a single unit for a cooler box. The present invention relates to a dual-type vehicle air conditioner that can be selected as required.

[Conventional technology]

2. Description of the Related Art Conventionally, various dual-type air conditioning systems for vehicles such as automobiles, which have a cooler box on the rear seat side, have been put into practical use. However, most of the air conditioners had a configuration in which a cooler box was arranged in the passage of cool air discharged from the air conditioner on the rear seat side into the vehicle interior. However, there is a drawback that it cannot be used as a cooler box.

Recently, "a front-seat side and a rear-seat side air conditioner equipped with an evaporator, respectively, are provided with valves that can be respectively opened and closed arbitrarily in the front-seat side and rear-seat side refrigerant passages, and a rear-seat side air conditioner. The cool air passage is communicated with a cooler box, and the cooler box selectively communicates with the outside of the vehicle compartment by a cool air blow-out port that can be opened and closed into a vehicle compartment, a duct having an open / close damper that communicates with a trunk room, and a switching damper. An intake passage is formed, and a temperature sensor disposed in the cooler box is incorporated in at least an opening / closing control device of the opening / closing damper and a temperature controller of an air conditioner device. " (Japanese Utility Model Publication No. 60-138824)
Has been proposed.

In the device disclosed in Japanese Utility Model Laid-Open Publication No. 60-138824, even when the vehicle interior is heated in winter, the on / off (ON / OFF) operation of the compressor for the rear air conditioner communicating with the cooler box is controlled. During this time, outside air is introduced through the inside / outside air switching damper, passes through the evaporator, becomes cool air, cools only the inside of the cool box, is discharged into the trunk room, and does not affect the temperature in the vehicle compartment, and the cooler box is kept low. The temperature is to be set.

[Problems to be solved by the invention]

In the conventional example described in Japanese Utility Model Application Laid-Open No. 60-138824, valves that can be arbitrarily opened and closed are provided in the refrigerant passages on the front seat side and the rear seat side, respectively. A cool air outlet, a duct having an opening / closing damper leading to a trunk room, and an outside air passage selectively communicating with the inside and outside of the vehicle compartment by a switching damper are formed. Can be used.

However, the rear seat air conditioner generally has a smaller capacity than the front seat air conditioner. In the case of the above-described conventional example, on / off control of the compressor is performed according to the temperature detected by the temperature sensor. Therefore, the on / off switching of the compressor tends to be performed frequently, and particularly in winter when only the rear evaporator is used, the temperature in the cooler box fluctuates due to indoor heating. Significantly, there is a disadvantage that the passenger feels discomfort due to the shock when the compressor is switched on / off.

[Object of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to improve the disadvantages of the prior art, and in particular, to reduce the number of times the compressor is switched on / off when only the rear evaporator is used, such as when using a cooler box in winter, thereby reducing An object of the present invention is to provide a dual-type air conditioner for a vehicle, which can further improve the livability and reduce the consumed horsepower.

[Means for solving the problem]

In the present invention, a compressor for refrigerant compression, a front-seat evaporator and a rear-seat evaporator connected to the compressor through a refrigerant passage are provided, and a refrigerant passage from the compressor to each evaporator can be arbitrarily opened and closed. A flow rate control valve is interposed respectively, and a case accommodating a rear-seat evaporator is connected to a cooler box and has a rear-seat outlet capable of opening and closing the cooler box. In a dual-type air conditioner for a vehicle having an air intake opening in an air passage selectively communicating with the interior and exterior of the vehicle, a plurality of plate-side bypass holes are formed in a peripheral portion of the compressor. A control plate is provided and the temperature in the cool air passage from the evaporator to the cooler box is detected in a part of the cool air passage. A temperature sensor for disposing.

Further, the control plate operates when the above-mentioned temperature sensor detects a temperature equal to or lower than a predetermined set temperature, energizes the control plate via a driving means to rotate the control plate by a predetermined angle, and activates the compressor at a maximum. A control means for controlling the capacity is also provided.

When the control means rotates the control plate by a predetermined angle, the plate-side bypass hole is connected to an intake port formed in advance on the compressor body side and a main body-side bypass hole communicating with the intake port side. A configuration is adopted in which communication is established by overlapping a predetermined amount, thereby variably controlling the compressor capacity up to the maximum capacity. by this,
It is intended to achieve the above-mentioned object.

(Example of the invention)

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 9.

In this embodiment, as shown in FIG. 8, an air conditioner 1 for a front seat is provided in front of a front seat 51 on the passenger seat side of the vehicle 100.
The rear air conditioner 2 is provided on the back of the front seat 51 and the front seat 52 on the driver's side.

 FIG. 1 shows the overall configuration of this embodiment.

In FIG. 1, the present air conditioner includes a compressor 3 for compressing a refrigerant, which is driven by a power source such as a V level (not shown) using an engine (not shown) as a power source, and a refrigerant compressed by the compressor 3. A condenser 4 for cooling and liquefaction, a receiver drier 5 for temporarily storing the liquefied refrigerant in the condenser 4 (to respond to the outside air condition), and a refrigerant passage in the receiver drier 5
Front seat evaporator 8 connected via 6 and 7, respectively
And a rear seat evaporator 9.

Among them, the front-seat evaporator 8 and the rear-seat evaporator 9 are for evaporating and vaporizing the liquid refrigerant sent from the compressor 3 side. It constitutes a main part of the air conditioner device 2.

In other words, the structure has a structure in which the air blown to each of the evaporators 8 or 9 is deprived of the heat of vaporization by the refrigerant passing through the inside of each of the evaporators 8 or 9, thereby producing cool air. These specific mounting positions are described in the eighth section.
This is shown by hatching in FIGS.

As shown in FIG. 1, in the refrigerant passage 6 from the receiver dryer 5 to the front seat evaporator 8, one solenoid valve 11 and one expansion valve 12 as flow control valves are interposed. The refrigerant passage 6 is formed by a high-pressure pipe for cooling, and is provided with a refrigerant passage 7 that branches from an intermediate portion of the refrigerant passage 6 to the evaporator 9 for a rear seat. This refrigerant passage 7 is also formed by a refrigerant high-pressure pipe, and an electromagnetic valve 13 and an expansion valve 14 each serving as a flow control valve are interposed in an intermediate portion thereof. Here, the solenoid valves 11 and 13 can be arbitrarily opened and closed, and are connected to a controller (not shown) so as to control supply of refrigerant to the evaporator 8 for the front seat and the evaporator 9 for the rear seat, respectively.

On the other hand, a refrigerant passage 15 returning from the evaporator 8 for the front seat to the compressor 3 is formed of a low pressure type, and a refrigerant passage 16 returning from the evaporator 9 for the rear seat to the compressor 3 is provided in a state branched from an intermediate portion thereof. This refrigerant passage 16
Is also formed by a low pressure pipe.

The rear-seat evaporator 9 is actually housed and installed in an intermediate portion in a case 17 forming a cool air passage, as shown in FIG. The upper part of FIG.
A cooler box 20 is formed integrally with a partition plate 18 having a plurality of slits. In the vicinity of the bottom of the cooler box 20, that is, just above the partition plate 18, a temperature sensor 10 for detecting the evaporator outlet temperature is mounted. In addition, a tubular member 22 having outlets 23A and 23B for rear seats is formed projectingly from the lid 21 of the cooler box as shown in FIG. 6, and the tip is shown in FIG. So that it is open toward the rear seat face position.

Further, one side of the case 17 in FIG. 6 is provided with upper and lower openings, and a bypass duct 24 connecting these openings is provided. A damper 25 is mounted on the upper part of the gate 17 at a position where the above-described opening can be closed so as to be able to move up and down. When the damper 25 is at the position shown by the solid line in FIG. 6, it has a structure that can close the opening at the lower end side of the tubular member 22 described above. That is, the damper 25 also functions as a damper for opening and closing the outlet for the rear seat.

On the other hand, a fan 27 which is driven by a motor 26 and rotates is provided in a lower part in the case 17. In addition, an air inlet 30A opened to the air passage 30 is provided on the bottom surface of the bypass duct 24. Further, in the bypass duct 24, a damper 28 for opening and closing the air suction port is provided so as to be able to move up and down freely. The air passage 30 is configured to be able to selectively communicate with the inside and outside of the vehicle by a switching damper (not shown). The above-described damper 25 and damper 28 can be opened and closed as needed by a controller (not shown).

Next, the specific structure and operation of the compressor 3 will be described with reference to FIGS.

The compressor 3 includes a compressor main body 31, a one-end open casing 32 that hermetically surrounds the compressor main body 31,
A front head 33 attached to the open end face of the casing 32.

Among them, the compressor body 31 is a cylinder 34 having a substantially elliptical cylindrical inner circumference.
And a front side block 35 and a rear side block 36 attached to both sides of the cylinder 34. In a substantially elliptical cylindrical cylinder chamber 37 formed by the front side block 35 and the rear side block 36, A solid cylindrical rotor 40 to which five vanes 39 (see FIGS. 4 and 5) that are freely movable in the radial direction are mounted is rotatably mounted.

A substantially disk-shaped control plate 41 is provided on the inner surface side of the front side block 35, and the control plate 41 is supported by being fitted to the rotor shaft 38 so as to be rotatable within a predetermined angle.

Further, a plate-side bypass hole 42 is provided at a peripheral portion of the control plate 41 so as to face 180 degrees, and the plate-side bypass hole 42 is provided in the front side block 35 on the main body side by rotation of the control plate 41. The suction port 43 and the main body side bypass hole 44 (see FIG. 5) are selectively communicated with each other. As shown in FIGS. 4 and 5, the intake port 43 and the main body side bypass hole 44 are formed in a long hole shape along the rotation direction.

Then, for example, during the maximum capacity operation (when the capacity is not controlled), the plate-side bypass hole 42 of the control plate 41 is used.
And the suction port 43 of the front side block 35 coincide with each other, and the maximum refrigerant gas is supplied from the suction chamber 45 to the cylinder chamber 37 through the suction port 43 and the plate-side bypass hole 42. The maximum capacity is obtained as shown by the hatched lines in FIG.

On the other hand, at the time of the minimum capacity operation (the state where the maximum capacity is controlled), the control plate 41 is rotated by a driving unit described later,
The plate-side bypass hole 42 of the control plate 41 and the body-side bypass hole 44 formed in the front side block 35 coincide with each other.
The compressed gas in the cylinder chamber 37 is bypassed to the suction chamber 45 on the side of the intake port 43 through 44, and as a result, the capacity of the compression working chamber becomes the minimum capacity as shown by hatching in FIG. In this case, the amount of rotation of the control plate 41 is arbitrarily set and controlled by the control means 70 described later.

Thus, the suction port 46 of the front head 33
The refrigerant gas introduced into 45 passes through the intake port 43 and is introduced into the cylinder chamber 37, and the volume of the compression working chamber is controlled as described above according to the operating condition, and the compressed high-pressure gas Passes through the discharge port 47, the cylinder 34 and the casing 32
Is discharged into a gap between the inner side of the rear side block 36 and a communication hole 48 provided in the rear side block 36.
The oil is supplied to the oil separator 49 at the back of the casing 32, and is discharged from the rear space of the casing 32 to the outside through the discharge port 29, as shown by the dashed arrow in FIG.

Next, the driving means of the control plate 41 will be described with reference to FIG.

An inner cylindrical opening 51 shown in FIG.
A plunger 52 is slidably provided in the opening 51. And the tip 52a of this plunger 52
Faces a suction chamber 45, and a permanent magnet 53 is fixed to a base end side thereof.

An electromagnet 54 arranged such that the same pole faces the permanent magnet 53 is fixed to the front head 33,
The repulsive force of the electromagnet 54 and the permanent magnet 53 causes the plunger 52 to move forward and backward.

On the other hand, a drive pin 55 is provided upright on the surface of the control plate 41, and the drive pin 55 is mounted on the front side block.
The suction chamber 45 penetrates through a cam groove 56 formed in an arc shape in 35.
The front end faces the side, and this front end is engaged with the inside 57 of the engaging portion provided at the front end of the plunger 52. Therefore, the plunger 52 and the control plate 41 are linked via the drive pin 55. In this embodiment, the drive pin 55 and the cam groove
The driving means 50 is constituted by 56, the plunger 52, the permanent magnet 53 and the electromagnet 54, and the driving means 50 and the control plate 41 constitute a capacity control mechanism of the compressor 3.

Here, the electromagnet 54 is configured by winding an iron 59 around the outer circumference of an iron core 58 and covering the housing 59 with an insulating material. One end of a rear seat air conditioner switch 61 is connected to the electromagnet 54. The other end of the rear seat air conditioner switch 61 is connected to a sensor switch 10a of a temperature sensor 10 for detecting an outlet temperature of the rear seat evaporator 9. This sensor switch 10a is connected to the temperature sensor 1
When 0 detects a predetermined set temperature, for example, a temperature of 10 ° C. or less, the contact is closed. The other end of the sensor switch 10a is connected to the battery 62. In this embodiment, the rear air conditioner switch 61
The control means 70 is constituted by a circuit including the sensor switch 10a and the battery 62.

That is, when the contact of the rear seat air conditioner switch 61 is closed and the contact of the sensor switch 10a is closed, that is, when the rear seat air conditioner 2 is used, the temperature near the outlet of the rear seat evaporator 9 is lower than the set temperature. If the battery 62
Power supply current is applied to the electromagnet 54 and the permanent magnet 53
3, the plunger 52 is moved in the direction of arrow A in FIG. The movement of the plunger 52 is
Is transmitted to the control plate 41, and the control plate 41 rotates by the maximum angle. For this reason, the compression working chamber is set to the minimum capacity.

In other words, under the control of the control means 70, the operating capacity of the compressor 3 is set according to the amount of rotation of the control plate 41. That is, the control means 70 is
By rotating the control plate 41 at a predetermined angle through 50, the plate-side bypass hole 42 is formed into an intake port 43 formed in advance on the compressor main body side and a main body-side bypass hole 44 communicating with the intake port 43 side. Thus, the compressors 3 communicate with each other by overlapping the predetermined amount, thereby variably controlling the capacity of the compressor 3 up to the maximum capacity.

According to the present embodiment described above, when used exclusively for the cooler box, the cool air from the rear-seat evaporator 9 is sucked into the bypass duct 24 without being discharged from the rear-seat outlets 23A and 23B, circulated and cooled again. Therefore, the inside of the cooler box 20 can be rapidly cooled.

When using it as a rear seat air conditioner,
Switch between 25 and 28, close both mouths of bypass duct 24,
The air is sucked in from the air inlet 30A, and cool air is blown out from the rear seat outlets 23A and 23B toward the rear seat face position. Since the solenoid valves 11 and 13 are provided on the upstream side (high pressure side) of the front seat evaporator 8 and the rear seat evaporator 9, respectively, the front seat evaporator 8 and the rear seat evaporator 9 are:
Each can be operated independently, and both can be operated at the same time.

On the other hand, when only the rear seat evaporator 9 is used, compared with the case where both the front and rear evaporators 8 and 9 are used,
Since the amount of circulating refrigerant may be small, the rear seat evaporator 9
When the outlet temperature of the compressor 3 is equal to or lower than the set temperature (for example, 10 ° C.), the compressor 3 can be controlled to the maximum capacity (the minimum capacity operation). This is convenient when using a cooler box such as in winter, spring, autumn, etc., which does not require much air conditioning, or when a person who is hot and wants to cool only the rear seats.

By controlling the compressor 3 to the maximum capacity, the frequency of turning on / off the compressor 3 can be reduced, thereby suppressing the discomfort of the occupant, and at the same time reducing the power loss of driving the compressor. There is an advantage that can be.

〔The invention's effect〕

As described above, according to the present invention, by the operation of the temperature sensor, the capacity control mechanism, and the control means, when the refrigerant circulation amount using only the rear seat evaporator may be small,
When the temperature sensor detects a temperature lower than the set temperature, the compressor is controlled to the maximum capacity (minimum capacity operation) as described above, so that the consumed horsepower can be reduced.
The frequency of switching the compressor on / off can be reduced,
In addition, the operating capacity of the compressor can be set arbitrarily, which makes it possible to effectively control the discomfort of the occupants according to the situation, and to improve the comfort of the passenger compartment. It is possible to provide an excellent dual-type air conditioner for vehicles.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of one embodiment of the present invention. FIG. 2 is an explanatory diagram showing the internal configuration of the compressor of FIG. FIG. 3 is an explanatory view showing driving means of a control plate of the compressor shown in FIG. FIG. 4 is an explanatory diagram showing the compression chamber when the capacity control of the compressor in FIG. 2 is not performed. FIG. 5 is an explanatory view showing the compression chamber at the time of the maximum capacity control of the compressor of FIG. Sixth
FIG. 2 is an explanatory view showing the structure of a case portion for accommodating the rear seat evaporator in FIG. FIG. 7 is a sectional view taken along the line VII-VII in FIG.
It is explanatory drawing which shows the state seen along the line. 8 and 9 are explanatory diagrams showing the actual arrangement of the evaporator. 3 ... compressor, 6, 7, 15, 16 ... refrigerant passage, 8 ...
Evaporator for front seat, 9 ... Evaporator for rear seat, 10 ...
… Temperature sensor, 11,13 …… Solenoid valve as flow control valve, 1
7 …… Case, 20… Cooler box, 23A, 23B …… Outlet for rear seat, 30 …… Air passage, 30A …… Air intake port, 4
1 ... Control plate, 42 ... Plate side bypass hole, 43
... intake port, 44 body side bypass hole, 50 driving means constituting a capacity control mechanism, 70 control means.

Claims (1)

(57) [Claims] A compressor for compressing a refrigerant, a front-seat evaporator and a rear-seat evaporator connected to the compressor via a refrigerant passage, and a refrigerant passage from the compressor to each evaporator can be arbitrarily opened and closed. And a case accommodating the rear-seat evaporator is communicated with a cooler box, and the cooler box has a rear-seat outlet that can be opened and closed. A dual-type air conditioner for a vehicle, comprising an air intake port opened to an air passage selectively communicating with the compressor, wherein the compressor is provided with a control plate having a plurality of plate-side bypass holes formed in a peripheral portion thereof. A temperature sensor for detecting the temperature in the cool air passage is provided in a part of the cool air passage from the evaporator to the cooler box. When the temperature sensor detects a temperature equal to or lower than a predetermined set temperature, the control plate is actuated, the control plate is urged via driving means to rotate the control plate by a predetermined angle, and A control means for setting and controlling the capacity of the compressor to a predetermined size is additionally provided. By controlling the control plate to rotate at a predetermined angle by the control means, a plate-side bypass hole is formed in the intake air previously formed on the compressor body side. A dual type for a vehicle, characterized in that a predetermined amount is overlapped and communicated with a port and a main body side bypass hole communicating with the intake port side so that the capacity of the compressor is variably controlled up to the maximum capacity. Air conditioner.