JP2001099525A - Liquid receiver and freezing cycle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide both an effect of preventing disturbance at an interface between gas and liquid in a liquid receiver and a cooling effect at an upper side in the liquid receiver when refrigerant flows into the liquid receiver. SOLUTION: There is provided a liquid receiver in which gas and liquid of refrigerant are separated and liquid refrigerant is accumulated. Upper side in a tank main body 311 is provided with a first refrigerant inlet 315 into which refrigerant passed through a condensing segment 36 of a condenser 2; a second refrigerant inlet 316 for flowing refrigerant into a lower side in the tank main body 311; and a refrigerant outlet 313 for flowing out the liquid refrigerant accumulated in the tank main body 311. With such an arrangement as above, it is possible to flow the refrigerant from the first and second refrigerant inlets 315, 316 into both upper and lower sides in the tank main body 311.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration cycle apparatus provided with a receiver for storing gaseous liquid and liquid refrigerant that has passed through a condenser and stores the liquid refrigerant, and relates to an improvement in the refrigerant charging characteristics of the receiver. It is suitable for use in a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, in a refrigeration cycle apparatus, a method of flowing a refrigerant into a receiver is roughly divided into the following two methods. One is to dispose a refrigerant inlet at the upper part of the liquid receiver and let the whole amount of the refrigerant after passing through the condenser flow downward from the upper refrigerant inlet into the liquid receiver.

[0003] Another one is to dispose a refrigerant inlet at a lower portion of a receiver, and to allow the entire amount of the refrigerant after passing through the condenser to flow into a liquid refrigerant at a lower side in the receiver from the lower refrigerant inlet. It is.

[0004]

By the way, the above-mentioned prior art is actually examined on a trial basis to evaluate the refrigerant charging characteristics in the refrigeration cycle (specifically, in the receiver). It has been found that it is difficult to obtain the ideal refrigerant charging characteristics required for efficiency.

FIG. 5 is a graph showing the relationship between the subcooling (subcooling degree) of the liquid refrigerant flowing out of the subcooler outlet in a refrigeration cycle (subcooling cycle) having a subcooler for supercooling the liquid refrigerant from the receiver outlet. The axis of abscissa indicates the amount of refrigerant charged into the cycle on the abscissa.

[0006] In the case of a refrigeration cycle of a vehicle air conditioner, the amount of refrigerant charged is usually set at the sight glass downstream of the subcooler so that even if some refrigerant leakage occurs in the future, the cooling performance is not affected. It is designed to add about 100 g of refrigerant increase after the bubble extinction point, and the specified value of this additional amount (100 g of refrigerant increase after the bubble extinction point) has a variation in the refrigerant charging operation. Considering this, a certain range of tolerance is provided.

Therefore, as shown by a characteristic A in FIG. 5, a region B is set in which the subcool is maintained at a substantially constant value even if the amount of the charged refrigerant is increased by a predetermined amount. It is desired to prevent an increase in cycle high pressure due to the above and suppress an increase in compressor power.

[0008] In the above-described conventional refrigerant inflow system of the receiver, the system in which the entire amount of the refrigerant after passing through the condenser flows in the lower part of the receiver from the refrigerant inlet at the upper part of the receiver is used. The gas-liquid interface in the receiver is easily disturbed by the influence of the dynamic pressure of the refrigerant flowing from the refrigerant inlet. In particular, when the flow rate is high, the turbulence at the gas-liquid interface increases, and a phenomenon occurs in which the gas refrigerant mixes with the refrigerant flowing from the receiver outlet to the supercooler.

As a result, the amount of refrigerant charged until the subcool is stabilized increases as shown by a broken line with respect to the ideal refrigerant charging characteristic of the above A, which means that the range of the subcool stable region B is increased. As a result, the refrigerant charging characteristics deteriorate.

[0010] On the other hand, of the conventional refrigerant flow in the receiver, the entire amount of the refrigerant after passing through the condenser from the refrigerant inlet at the lower part of the receiver is introduced into the liquid refrigerant in the lower part of the receiver. In the above, since the refrigerant from the refrigerant inlet flows into the liquid refrigerant, there is an advantage that the gas-liquid interface is not disturbed, but on the other hand, the refrigerant inlet and the refrigerant outlet are both arranged below the receiver. Therefore, a short circuit in which the refrigerant from the refrigerant inlet directly goes to the refrigerant outlet on the lower side in the liquid receiver is formed. Therefore, the cooling effect by the inflow refrigerant cannot be expected on the upper side in the liquid receiver.

As a result, when the receiver receives heat from the surrounding high-temperature atmosphere (for example, radiant heat from a vehicle engine or heat wrap around hot air after passing through the radiator), the temperature in the upper side of the receiver becomes high. The following problems occur. In other words, when the refrigerant is charged into the cycle, if the amount of the charged refrigerant further increases after the bubble extinction point, the refrigerant liquid level in the receiver gradually increases. If the upper side of the receiver becomes hot due to heat received from the surroundings, the liquid refrigerant in the upper part of the receiver will boil and gasify, so the liquid refrigerant will not easily rise to the upper side in the receiver. Occurs.

As described above, when it becomes difficult for the liquid refrigerant to rise in the liquid receiver, the refrigerant added thereafter cannot be accumulated in the liquid receiver at the time of charging the refrigerant. Since the liquid refrigerant overflows and enters an overfilling cycle state, as shown by the broken line in FIG. 5, the subcooling increases continuously with only a small increase in the amount of charged refrigerant. This causes a problem of causing an increase in the number.

In view of the above, the present invention provides a refrigeration cycle apparatus having a liquid receiver, which has an effect of preventing the gas-liquid interface in the liquid receiver from being disturbed when the refrigerant flows into the liquid receiver. An object is to make it possible to achieve both the cooling effect on the upper side and the cooling effect on the upper side.

[0014]

To achieve the above object, according to the first aspect of the present invention, there is provided a liquid receiver for separating gas-liquid refrigerant and storing the liquid refrigerant in an upper side of a tank body (311). A first refrigerant inlet (315) through which the refrigerant that has passed through the condenser (2) flows into the portion; and a second refrigerant inlet through which the refrigerant that has passed through the condenser (2) flows into the lower portion of the tank body (311).
And a refrigerant outlet (313) through which the liquid refrigerant accumulated in the tank body (311) flows out.

Thus, the first and second refrigerant inlets (31)
5, 316) can be made to flow into the upper and lower sides of the tank body (311). Therefore, the upper space of the tank main body (311) can always be cooled by the refrigerant from the first refrigerant inlet (315), that is, the refrigerant cooled by passing through the condenser (2).

Therefore, the liquid receiver (31) is caused by radiant heat from the vehicle engine, hot air after passing through the radiator, and the like.
Even when the liquid refrigerant is used in an environment where heat is received, it is possible to satisfactorily prevent the liquid refrigerant on the upper side in the liquid receiver from boiling due to the cooling effect. Therefore, the liquid level of the liquid refrigerant can be raised to the upper side inside the tank body (311), and the entire volume of the liquid receiver (31) can be effectively used for accumulating the liquid refrigerant.

In addition, the first and second refrigerant inlets (315,
316) by flowing the refrigerant into the upper and lower sides,
Disturbance of the gas-liquid interface in the liquid receiver (31) can also be favorably prevented. That is, the refrigerant from the second refrigerant inlet (316) can flow into the liquid refrigerant on the lower side inside the tank body (311), so that the gas-liquid interface is not disturbed.

Further, by dividing the refrigerant inflow into upper and lower sides, the dynamic pressure of the refrigerant ejected from the upper first refrigerant inlet (315) can be sufficiently reduced. Disturbance of the gas-liquid interface due to the dynamic pressure of the refrigerant can also be favorably suppressed.

According to the second aspect of the present invention, in the first aspect, the refrigerant outlet (3) is provided below the second refrigerant inlet (316).
13) is arranged.

Thus, the gas refrigerant from the second refrigerant inlet (316) can be prevented from entering the refrigerant outlet (313).

According to a third aspect of the present invention, in the first or second aspect, the inlet pipe (314) into which the refrigerant that has passed through the condenser (2) flows is disposed vertically in the tank body (311). A first refrigerant inlet (315) is arranged at an upper part of the pipe (314), and a second refrigerant inlet (316) is arranged at a lower part of the inlet pipe (314).

Thus, one inlet pipe (314)
The refrigerant can flow into the tank body (311) from above and below.

According to a fourth aspect of the present invention, in the third aspect, the refrigerant flows from the first refrigerant inlet (315) toward the ceiling of the tank body (311).

Thus, after the refrigerant from the first refrigerant inlet (315) gushes toward the ceiling of the tank main body, the refrigerant diffuses along the inner surface of the ceiling to the outer peripheral side, and further, the cylinder of the tank main body (311). The refrigerant drops along the entire circumference of the surface. Therefore, due to the refrigerant flow from the first refrigerant inlet (315),
The cooling effect of the upper space of the tank body can be enhanced.

At the same time, the refrigerant from the first refrigerant inlet (315) collides with the ceiling of the tank body and diffuses, so that the dynamic pressure of the refrigerant sharply decreases, thereby improving the effect of preventing the gas-liquid interface from being disturbed. it can.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a desiccant (317) is disposed at an intermediate position in the vertical direction inside the tank body (311). The first refrigerant inlet (315) is arranged in the space above (317), and the desiccant (317)
A second refrigerant inlet (316) in the lower space of the first
The refrigerant flowing into the inside of the tank body (311) from the refrigerant inlet (315) is directed downward through the gap of the desiccant (317).

Thus, the upper first refrigerant inlet (31)
When the dynamic pressure of the refrigerant from the first refrigerant inlet (315) passes between the desiccants (317) because the refrigerant from 5) passes through the gap between the desiccants (317) toward the gas-liquid interface of the refrigerant. And the disturbance of the gas-liquid interface can be suppressed.

Next, in the invention according to claim 6, a condenser (2) for cooling and condensing the superheated refrigerant gas discharged from the compressor (1), and a refrigerant of the refrigerant passing through the condenser (2). The present invention is directed to a refrigeration cycle apparatus including a liquid receiver (31) that separates gas and liquid and stores a liquid refrigerant.
A first refrigerant inlet (315) through which the refrigerant that has passed through the condenser (2) flows into the upper part of the inside, and a refrigerant that has passed through the condenser (2) flows into the lower part inside the receiver (31). And a refrigerant outlet (313) for allowing the liquid refrigerant accumulated in the liquid receiver (31) to flow out to the outside.

As a result, the first and second refrigerant inlets (31)
5, 316), the refrigerant can flow into the upper and lower sides in the tank body (311), so that the gas-liquid interface in the liquid receiver is prevented from being disturbed and the upper side in the liquid receiver as in claim 1. Cooling effect.

Next, in the invention according to claim 7, a condensing section (36) for cooling and condensing the superheated refrigerant gas discharged from the compressor (1) and a subcooling section (37) for subcooling the liquid refrigerant. A condenser (2) having a condenser and a receiver (3) for separating gas-liquid of the refrigerant passing through the condenser (36) and storing the liquid refrigerant.
1), a first refrigerant inlet (315) through which the refrigerant that has passed through the condensing portion (36) flows into the upper part in the liquid receiver (31), and a liquid receiver ( 31) a second refrigerant inlet (316) through which the refrigerant that has passed through the condensing section (36) flows into the lower side, and a liquid receiver (3).
1) a refrigerant outlet (313) through which liquid refrigerant accumulated in the subcooling section (37) flows out.

Thus, the condenser (3) is added to the condenser (2).
6) and a supercooling unit (37),
The effect of preventing the turbulence of the gas-liquid interface in the receiver and the effect of cooling the upper side in the receiver can be achieved.

In the refrigeration cycle apparatus according to the sixth or seventh aspect, the liquid receiver (31) may be formed separately from the condenser (2) as described in the eighth aspect, or in the ninth aspect.
It may be integrated with the condenser (2) as described.

Note that the reference numerals in parentheses attached to the above means indicate the correspondence with specific means described in the embodiments described later.

[0034]

(First Embodiment) FIG. 1 shows a first embodiment, and shows an example in which the present invention is applied to a refrigeration cycle device in a vehicle air conditioner. The refrigeration cycle device of this automotive air conditioner includes a compressor 1, a supercooling unit integrated condenser 2, a liquid receiver 31, a sight glass 3, a temperature-operated expansion valve (decompression means) 4, and an evaporator 5, which are made of metal. It is composed of a closed circuit which is sequentially connected by a pipe or a refrigerant pipe made of a rubber hose.

The compressor 1 is provided with a belt and an electromagnetic clutch (power intermittent means) 1a on a traveling engine (not shown) of the automobile.
And driven by the rotational power of the engine. As a result, the compressor 1 sucks and compresses the low-pressure gas refrigerant from the downstream side of the refrigerant evaporator 5 and discharges the high-temperature and high-pressure superheated gas refrigerant to the condenser 2.

The condenser 2 has a pair of header tanks, that is, first and second header tanks 21 and 22 arranged at a predetermined interval.
Reference numerals 1 and 22 each have a shape extending in a substantially cylindrical shape in the vertical direction. A core section 23 for heat exchange is arranged between the first and second header tanks 21 and 22.

The condenser 2 of the present embodiment is generally called a multi-flow type.
A large number of flat tubes 24 for flowing the refrigerant in the horizontal direction are arranged in parallel between the second header tanks 21 and 22, and corrugated fins 25 are interposed between the many flat tubes 24. One end of the flat tube 24 communicates with the first header tank 21, and the other end of the flat tube 24
Communicates within.

Then, one (first) header tank 21
An inlet-side pipe joint (first refrigerant inlet) 26 for the refrigerant from the compressor 1 is joined to the upper end of the compressor. In addition, a pipe joint (second refrigerant inlet portion) 27 for the inlet of the refrigerant from the liquid receiver 31 is joined to the lower end of the header tank 21.

Further, in this embodiment, the first and second two separators 28a, 28
b and the third header tank 22 in the second header tank 22.
A separator 28c is provided. Thus, the inside of the first header tank 21 is vertically divided into a plurality (three) of spaces 21a, 21b, and 21c, and the inside of the second header tank 22 is vertically (a plurality of) two spaces 22.
a, 22b.

Therefore, the refrigerant from the inlet-side piping joint 26 is allowed to flow through the upper space 22a and the upper flat tube 24 and then U-turned in the upper space 22a of the second header tank 22 as shown by the arrow a. Can be.

Here, the lower second separator 28b in the first header tank 21 and the third separator 28c in the second header tank 22 are arranged at the same height. In the core portion 23, the second and third separators 28b, 28
The condensing unit 36 is configured above the position c, and the supercooling unit 37 is configured below the condensing unit 36.

The upper condensing section 36 exchanges heat of the gas refrigerant discharged from the refrigerant compressor 1 with outdoor air sent by a cooling fan (not shown) to cool and condense the refrigerant. In addition, the lower supercooling unit 37 superheats the liquid refrigerant separated in gas and liquid inside the liquid receiver 31 by exchanging heat with outdoor air.

An intermediate space 21b of the first header tank 21
, A refrigerant outlet side pipe joint (first refrigerant outlet) 29 toward the liquid receiver 31 is joined to the second header tank 2.
An outlet pipe joint (second refrigerant outlet) 30 for the refrigerant toward the sight glass 3 is joined to the lower space 22b of the second. In this example, each part of the condenser 2 is formed of an aluminum material and is assembled by integral brazing.

In this embodiment, the liquid receiver 31 is formed separately from the condenser 2, and is connected to the outlet-side pipe joint 29 and the inlet-side pipe joint 27 of the condenser 2 via pipes 32 and 33. The liquid receiver 31 has a tank body 311 that separates gas-liquid refrigerant and stores the liquid refrigerant. This tank body 31
Reference numeral 1 denotes a vertically long cylindrical shape made of metal such as aluminum.

Then, on the bottom of the tank body 311,
Inlet side connection part 31 into which the refrigerant condensed in condensation part 36 flows
2 and an outlet-side connection portion (refrigerant outlet) 313 through which the liquid refrigerant in the tank body 311 flows out is disposed. The lower end of the inlet pipe 314 is fixedly connected to the inlet side connection portion 312. The inlet pipe 314 is disposed so as to extend in the vertical direction in the internal space of the tank body 311.
The upper end extends to near the ceiling of the tank body 311 to form a first refrigerant inlet 315.

The lower part of the inlet pipe 314 has a second
Is formed. The second refrigerant inlet 316 is located below the gas-liquid interface in the liquid receiver when the refrigerant charging amount is normal.

A drying agent 317 for absorbing water, such as zeolite, which is excellent in water absorption, is disposed at an intermediate portion of the inlet pipe 314 in the vertical direction. This desiccant 317
Is held by porous or net-shaped partition plates 318 and 319 arranged on both upper and lower sides thereof. In FIG. 1, for simplicity of illustration, the entire tank body 311 is shown as an integral structure, but the inlet pipe 314 and the desiccant 3
In order to insert the partition plates 318 and 319 into the tank, the bottom of the tank body 311 is actually formed separately from other parts.

Next, the operation of the above configuration will be described.
Now, when the operation of the vehicle air conditioner is started and the electromagnetic clutch 1a is energized, the electromagnetic clutch 1a is connected, the rotation of the vehicle engine is transmitted to the compressor 1, and the compressor 1 compresses the refrigerant. Discharge.

As a result, the superheated gas refrigerant discharged from the compressor 1 flows into the upper space 21a of the first header tank 21 of the condenser 2 from the inlet side pipe joint 26, and from there, the upper tube 24 of the condenser 36. After passing through the second
It flows into the upper space 22a of the header tank 22.

Then, the refrigerant makes a U-turn in the upper space 22a as shown by the arrow a, and the lower tube 24 of the condensing part 36 is turned.
After passing through, the intermediate space 21 of the first header tank 21
b. During this time, the refrigerant exchanges heat with the cooling air via the tubes 24 and the fins 25 to be cooled, and becomes a saturated liquid refrigerant partially including a gas refrigerant. This saturated liquid refrigerant is
Next, the outlet side pipe joint 2 is moved from the intermediate space 21b.
9. The inlet-side connection part 31 of the receiver 31 passing through the pipe 32
Head to 2.

Then, the refrigerant flows into the inlet pipe 314 from the inlet side connection part 312, and the first refrigerant inlet 315 provided at the upper end of the inlet pipe 314 and the second refrigerant inlet provided at the lower part of the inlet pipe 314. Refrigerant flows into the tank body 311 from both of the tanks 316.

The gas-liquid of the refrigerant is separated in the tank body 311 and the liquid refrigerant is stored. The liquid refrigerant in the liquid receiver 31 flows out of the outlet-side connection portion (refrigerant outlet) 313 on the bottom surface, passes through the pipe 33, the inlet-side pipe joint 27, and further passes through the lower space 21c of the first header tank 21. And flows into the tube 24 of the supercooling section 37.

Then, the liquid refrigerant is cooled again in the supercooling section 37 to be in a supercooled state, and the supercooled liquid refrigerant passes through the lower space 22 b of the second header tank 22 and passes from the outlet side pipe joint 30 to the condenser 2. Spills out.

Next, the supercooled liquid refrigerant flows into the temperature-operated expansion valve 4 through the sight glass 3. In the expansion valve 4, the supercooled liquid refrigerant is decompressed and becomes a low-temperature, low-pressure gas-liquid two-phase refrigerant. Next, the gas-liquid two-phase refrigerant exchanges heat with the air-conditioning air in the evaporator 5 to evaporate, absorbs the latent heat of evaporation from the air-conditioning air, and cools the air-conditioning air. The gas refrigerant evaporated in the evaporator 5 is sucked into the compressor 1 and is compressed again.

Next, the effect of improving the refrigerant charging characteristics by improving the refrigerant inflow path into the liquid receiver 31, which is a main part of the present invention, will be described in detail.

According to the present embodiment, the refrigerant condensed in the condensing section 36 of the core section 23 passes through the inlet pipe 314, and the first and second refrigerant inlets 315, 316 of the inlet pipe 314.
Flows into the upper and lower sides (upper and lower sides with respect to the refrigerant liquid level) in the tank body 311 of the liquid receiver 31, the following operation is obtained.

First, the refrigerant from the first refrigerant inlet 315 gushes toward the center of the ceiling of the tank body 311 and collides with the ceiling, and then diffuses to the outer periphery along the inner surface of the ceiling. Further, the refrigerant drops along the entire circumference of the cylindrical surface of the tank body 311. Therefore, the upper space of the tank body 311 can always be satisfactorily cooled by the refrigerant cooled by passing through the condenser 36.

Therefore, even if the liquid receiver 31 is used in an environment where the liquid receiver 31 receives heat due to radiant heat from the vehicle engine, hot air after passing through the radiator, or the like, the liquid refrigerant on the upper side in the liquid receiver boils due to the cooling effect. Can be satisfactorily suppressed. Therefore, the liquid level of the liquid refrigerant can be raised to the upper side in the liquid receiver, and the entire volume of the liquid receiver 31 can be effectively used for accumulating the liquid refrigerant.

As a result, according to the present embodiment, the overfilling cycle is started only after the increase in the amount of the charged refrigerant becomes sufficiently larger than the characteristic shown by the broken line in FIG. 5, so that the characteristic shown by the broken line in FIG. In this case, it is possible to prevent the liquid refrigerant from overflowing to the condenser 2 side early in the stage where the amount of the charged refrigerant is increased by a small amount, thereby causing an overfill cycle state.

The second feature is that the turbulence of the gas-liquid interface in the receiver 31 can be prevented well. That is,
Since the refrigerant flowing from the second refrigerant inlet 316 below the inlet pipe 314 flows into the liquid refrigerant below the tank body 311, it does not disturb the gas-liquid interface.

Furthermore, by dividing the refrigerant inflow into upper and lower sides, the dynamic pressure of the refrigerant ejected from the upper first refrigerant inlet 315 can be sufficiently reduced. In addition, the refrigerant from the upper first refrigerant inlet 315 gushes toward the ceiling of the tank body 311 and collides with the refrigerant through the gap between the desiccants 317 to the gas-liquid interface of the refrigerant. 1 refrigerant inlet 3
The gas-liquid interface will not be disturbed by the dynamic pressure of the refrigerant from the refrigerant 15.

This prevents the gas refrigerant from entering the outlet side of the liquid receiver 31 and stabilizes the subcool earlier when the increase in the amount of charged refrigerant is smaller than the characteristic indicated by the broken line in FIG. be able to.

By combining the above first and second features, in FIG. 5, the stable region B of the subcool can be expanded as compared with the prior art, and the refrigerant charging characteristic can be made closer to the ideal characteristic A shown by the solid line.

As a result, a predetermined level of subcool can be set stably, and cooling performance can be ensured, and at the same time, high pressure rise (compressor power increase) due to the overfill cycle state can be prevented.

(Second Embodiment) FIG. 2 shows a second embodiment. In the first embodiment, both the inlet side connection part 312 and the outlet side connection part (refrigerant outlet) 313 are arranged on the bottom surface of the tank body 311. However, in the second embodiment, the entrance-side connecting portion 3
12 is arranged on the upper surface of the tank body 311.

Accordingly, the upper end of the inlet pipe 314 is fixed so as to communicate with the inlet side connection 312 on the upper surface. A first refrigerant inlet 315 is formed above the inlet pipe 314 (above the desiccant 317). The lower end of the inlet pipe 314 penetrates through the desiccant 317 and hangs down to near the bottom of the tank body 311.
A second refrigerant inlet 316 is formed at the lower end of the inlet pipe 314.

Even when the liquid receiver 31 is configured in this manner, the tank main body 31 is connected to the first and second refrigerant inlets 315 and 316.
By causing the refrigerant to flow into the upper and lower sides of the inside 1, the same operation and effect as in the first embodiment can be exerted.

(Third Embodiment) FIG. 3 shows a third embodiment, in which the configuration of the liquid receiver 31 on the refrigerant outlet side in the second embodiment is modified. That is, in the third embodiment, in addition to the inlet side connection part 312, the outlet side connection part 313 is also arranged on the upper surface of the tank body 311.

Accordingly, an outlet pipe 320 is added, and the upper end of the outlet pipe 320 is fixed so as to communicate with the outlet side connection portion 313 on the upper surface. Then, the lower end of the outlet pipe 320 penetrates through the desiccant 317 and hangs down to below the lower end of the inlet pipe 314, and a liquid refrigerant suction port 321 is formed at the lower end of the outlet pipe 320. I have.

Even when the liquid receiver 31 is configured as described above, the same operation and effect as those of the first and second embodiments can be exhibited.

(Fourth Embodiment) FIG. 4 shows a fourth embodiment. In all of the first to third embodiments, the liquid receiver 31 is formed separately from the condenser 2. In the embodiment, the liquid receiver 31 is formed integrally with the condenser 2.

That is, in the fourth embodiment, the liquid receiver 31 is formed integrally with the first header tank 21 along the vertical direction of the first header tank 21. Here, the tank shapes of both the first header tank 21 and the liquid receiver 31 can be specifically formed by integral extrusion molding of aluminum.

The inside of the first header tank 21 is partitioned into two upper and lower spaces 21a and 21c by one separator 28b. Then, the inlet-side piping joint 2 for the refrigerant from the compressor 1 is placed in the upper space 22a of the second header tank 22.
6, the refrigerant having passed through the condensing portion 36 of the core portion 23 flows into the upper space 21a of the first header tank 21.

Three communication holes 39, 40, and 41 are formed vertically in a partition wall 38 between the liquid receiver 31 and the first header tank 21. The uppermost communication hole 39 communicates the upper part of the upper space 21a of the first header tank 21 with the upper part of the liquid receiver 31, and the first refrigerant inlet 3 of the first to third embodiments.
This is equivalent to 15. In addition, the communication hole 40 in the middle portion
Is for communicating the lower part of the upper space 21a of the first header tank 21 with the liquid refrigerant in the lower part of the liquid receiver 31.
It corresponds to the second refrigerant inlet 316 of the third embodiment.

The lowermost communication hole 41 communicates the vicinity of the bottom in the liquid receiver 31 with the lower space 21c of the header tank 21, and directly allows the liquid refrigerant accumulated in the lower part of the liquid receiver 31 to pass therethrough.
It flows into the space 21c. Therefore, the lowermost communication hole 41
Is the outlet side connection part (refrigerant outlet) 31 of the first to third embodiments.
This is equivalent to 3.

As described above, even if the liquid receiver 31 is integrally formed in the header tank portion of the condenser 2, the upper and lower communication holes 3
By causing the refrigerant to flow into the upper and lower sides of the liquid receiver 31 from the inlets 9 and 40 (first and second refrigerant inlets 315 and 316), the same operation and effect as in the first to third embodiments can be exerted.

In the fourth embodiment, the three communication holes 39, 40, 41 and the insertion hole 42 of the tube 24 are provided.
Can be opened by punching after extrusion molding. Both upper and lower end surfaces of the liquid receiver 31 and the first header tank 21 are closed by cap members 43 and 44.

The integrated structure of the first header tank 21 and the liquid receiver 31 according to the fourth embodiment is not limited to an extruded product.
The first header tank 21 and the liquid receiver 31 may be integrally joined by brazing or the like after separately forming the liquid receiver 31 with a metal plate material such as aluminum.

(Other Embodiments) The present invention can be variously modified without being limited to the above-described embodiment. For example, the core section 23 of the condenser 2 is made only of the condenser section 36, Of course, the present invention can be applied to a refrigeration cycle device of a type in which the portion 37 is separated from the core portion 23 and independently configured.

In this case, the outlet side connection part (refrigerant outlet) 313 of the liquid receiver 31 may be connected to the inlet of the supercooling part 37 via the pipe 33.

The present invention can be similarly applied to a refrigeration cycle apparatus having no supercooling section 37. In this case, since the saturated liquid refrigerant having no subcool at the outlet of the liquid receiver 31 passes through the sight glass 3, the vertical axis in the refrigerant charging characteristic diagram of FIG. Will be represented. In this case, according to the present invention, the stable region of the cycle high pressure (corresponding to the region B in FIG. 5) can be expanded, and the same operation and effect can be exhibited.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a fourth embodiment of the present invention.

FIG. 5 is a graph showing characteristics of charging a refrigerant into a refrigeration cycle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Condenser, 3 ... Sight glass, 4 ... Expansion valve, 5 ... Evaporator, 21 ... First header tank, 21a, 2
1b, 21c: space, 22: second header tank, 22
a, 22b: space, 23: core, 24: tube, 2
8a, 28b, 28c ... first to third separators, 31 ...
Liquid receivers, 313 ... outlet side connection part (refrigerant outlet), 315,
316: first and second refrigerant inlets, 36: condensing section, 37: supercooling section.

Claims (9)

[Claims] 1. A tank main body (311) for separating gas-liquid of a refrigerant having passed through a condenser (2) and storing a liquid refrigerant, and the condenser (2) is provided on an upper portion in the tank main body (311). The first refrigerant inlet (3
15), and a second refrigerant inlet (3) through which the refrigerant that has passed through the condenser (2) flows into a lower portion inside the tank body (311).
16) and a refrigerant outlet (313) through which liquid refrigerant accumulated in the tank body (311) flows out. 2. The liquid receiver according to claim 1, wherein the refrigerant outlet (313) is disposed below the second refrigerant inlet (316). 3. An inlet pipe (314) into which the refrigerant having passed through the condenser (2) flows is connected to the tank body (311).
The first refrigerant inlet (315) is disposed above the inlet pipe (314), and the second refrigerant inlet (316) is disposed below the inlet pipe (314). 3. The liquid receiver according to claim 1, wherein the liquid receiver is disposed. 4. The liquid receiver according to claim 3, wherein the refrigerant flows from the first refrigerant inlet (315) toward a ceiling of the tank body (311). 5. A desiccant (317) is disposed in the tank body (311) at an intermediate position in the vertical direction, and the first refrigerant inlet (315) is provided in a space above the desiccant (317). Disposing the desiccant (317)
The second refrigerant inlet (316) is arranged in a lower space of the tank main body (3) through the first refrigerant inlet (315).
The liquid receiver according to any one of claims 1 to 4, wherein the refrigerant having flowed into the inside of (11) is directed downward through a gap of the desiccant (317). 6. A condenser (2) for cooling and condensing the superheated refrigerant gas discharged from the compressor (1), and separating a gas-liquid of the refrigerant passing through the condenser (2) to form a liquid refrigerant. A liquid receiver (31) to be stored, a first refrigerant inlet (315) through which the refrigerant that has passed through the condenser (2) flows into an upper portion of the liquid receiver (31), and a liquid receiver (31) A second refrigerant inlet (316) through which the refrigerant that has passed through the condenser (2) flows into a lower portion of the inside of the liquid crystal display; 313). 7. A condenser (2) having a condenser (36) for cooling and condensing superheated refrigerant gas discharged from the compressor (1) and a supercooler (37) for subcooling liquid refrigerant. A liquid receiver (31) that separates gas-liquid of the refrigerant that has passed through the condensing part (36) and stores the liquid refrigerant, and has passed through the condensing part (36) to the upper part in the liquid receiver (31). A first refrigerant inlet (315) through which a refrigerant flows.
A second refrigerant inlet (316) through which the refrigerant that has passed through the condensing section (36) flows into a lower portion of the liquid receiver (31).
A refrigeration cycle device comprising: a refrigerant outlet (313) through which liquid refrigerant accumulated in the liquid receiver (31) flows out toward the supercooling section (37). 8. The condenser according to claim 6, wherein the liquid receiver is formed separately from the condenser.
A refrigeration cycle apparatus according to item 1. 9. The device according to claim 6, wherein the liquid receiver is formed integrally with the condenser.
A refrigeration cycle apparatus according to item 1.