JPS5864465A - Air conditioner for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to an air subphase device for automobiles.

Especially when the heat load inside the car is low, the on-off valve in the refrigeration cycle is fully closed and the cooling hC is turned off.

The present invention also relates to an air conditioning system for an automobile that allows the input of the compressor to be completely reduced.

In general, in automobile air conditioners, during continuous high-speed operation or once the P3 temperature has fallen, cooling overload occurs and the compressor repeatedly turns ON and OFF.
This shortens the life of the compressor and is also uncomfortable for the driver.

Conventionally, the configuration is as shown in FIG. That is, in the figure, (1j is a compressor, (21 is a condenser).

13) is a receiver, a dryer, (4) is an expansion valve, (5)
) is an evaporator.

In the next loop refrigeration cycle where these are connected in series with VC, the refrigerant made high @ and high pressure in the compressor +11 is transferred to the condenser +21.
The pressure is made high and the temperature is low, and after eliminating pulsating flow in the receiver (3), it is expanded to 9ft41, and heat is absorbed in the evaporator (5).

However, in this case, the air conditioner is turned on at what time.

The air temperature rises and falls with the repeated OFF cycles, but since the air from the blower inside the car is about 11% constant, the temperature inside the car also rises and falls with the ON-OFF cycle.
There were temperature fluctuations. In addition, the shock at ON and OFF's was quite large, making it uncomfortable for the driver.

This invention was made to eliminate the drawbacks of the conventional ones as described above, and has a coaxial, two-cylinder structure.
A lorry/rig, piston-type variable steering force type compressor with two suction ports and one discharge port is equipped with an on-off valve on the suction side.9During normal operation, the on-off valve is fully opened to maintain the original capacity. During continuous high-speed operation or when the heat index inside the motorbike is low, the on-off valve is closed to prevent refrigerant from being sucked into the 17S/DA, allowing it to run idly, thereby reducing the cooling capacity. , and reduce the compressor input by reducing the compressor load.
Air subphase device for automobiles that can measure continuous operation
is intended to provide.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the refrigeration cycle 4 of the air subphase device for automobiles according to the present invention, which has a +61 rri.

A rolling, piston-type U-heat variable compressor with a coaxial, two-cylinder structure, with two suction ports and one discharge port, 12) is a condenser, (3) is a receiver, a dryer, and a +41H expansion valve. , +51fl cooler.

(7) is an on-off valve, and the on-off valve (7) is Makinin 1 of the compressor.
011 to 10,000, and each of them is connected in series with a VC to form a refrigeration cycle tube.

In the refrigeration cycle configured as described above, normally, the on-off valve (7) is fully opened, and the refrigerant is sucked into the two cylinders from the two suction ports and compressed, and after being discharged, the compressor shell The mixture is mixed inside the vehicle and is pushed out from the discharge port to produce the original cooling power. However, during continuous high-speed operation or when the heat load inside the motor vehicle is low, by closing the on-off valve (7), it flows into the cylinder. The refrigerant runs out, the cooling capacity decreases, and the input to the compressor also decreases, making it possible to reduce the load on the compressor and allow continuous operation. As a result, as shown in FIG.

Conventionally, when the temperature inside the car stabilizes after 9 hours, it reaches 0N.
- OFF was occurring frequently, but one solution was to stably close the opening/closing valve (7) to provide cooling capacity that matched the heat load inside the vehicle.

By keeping the temperature inside the vehicle constant, reducing the load on the compressor, and operating continuously, there will be no severe vs ON or LIPF shock.

Figure 5 shows the characteristics of the cooling capacity and input at each rotation speed of the compressor.When the valve is closed, the cooling capacity and the input decrease over the entire rotation speed.

In the above embodiment, a rolling piston type compressor was used to create the refrigeration cycle, or a multi-page 7 type compressor or a punched type compressor could be used to create a similar refrigeration cycle with the same cooling capacity.

Input control is possible. Further, instead of the on-off valve, a solenoid valve or a switching valve that utilizes the negative pressure of the engine may be used.

As described above, according to the present invention, on-off valves are provided at the two suction ports of the rolling piston type variable capacity compressor, so that the air conditioning This allows for reduced force, continuous operation of the compressor, and low input power.

In addition, compressor ON and 011F jams have been drastically reduced, and i
Since the circle temperature remains constant, the effect σ is large, such as reducing the driver's discomfort.

[Brief explanation of the drawing]

Figure 1 shows the conventional air conditioner for automobiles. FIG. 2 is a refrigerant circuit diagram showing an air conditioning phaser rIIt for an automobile according to an embodiment of the present invention. Figure 3- is a diagram showing the time change in the temperature inside the car after cooling starts, Figure 4 is a characteristic curve diagram between engine speed and cooling capacity,
The fifth characteristic is the characteristic S between engine speed and compressor input.
It is a line diagram. In the figure, the mountain is the compressor, (2) is the condenser, (3) is the receiver, dryer, +4) is the expansion valve, (5) is the evaporator, (6) is the
) is a rolling piston type variable capacity compressor, and (7) is an on-off valve. Are the parts in the diagram the same or equivalent? show. Agent Shin Kuzuno −

Claims (1)

[Claims] From a coaxial, two-cylinder structure, a 7-row, histone-type variable capacity compressor with a population of V in two places and a discharge port in one place is used, and the compressor is installed in the engine vehicle. dedication vessel,
S/-Pa, hair dryer. Compressor suction? # I11 10,000 installed on-off valve t, car ¥
Install a cooler in the circle and 9F in the circle, connect each piping,
If the refrigeration cycle is configured and used as a power source for an automobile engine, 1 normally opens and closes ff, and 1 k.
When the heat load inside the chamber is low, the on-off valve is fully closed, eliminating refrigerant suction.
An air conditioner for an automobile, characterized in that the cold N capacity is fully lowered and the input flow of the compressor is lowered by completely running the cylinder.