JPH0914773A - Condenser - Google Patents

Abstract

PURPOSE: To provide a condenser capable of efficiently condensing high-pressure refrigerant in mixed refrigerant together with low-pressure refrigerant. CONSTITUTION: In the condenser 7, a first tube 16 connects the outlet tube 9b of a lower condenser part 9 to the inlet tube 8a of an upper condenser part 8, and a second tube 17 is connected to the downstream part of a capillary 14 where the outlet tube 8b of the part 8 is connected to the outlet tube 9b of the part 9. Thus, the high-pressure refrigerant in the mixed refrigerant not condensed by the part 9 is supplied to the part 8 via the tube 16, secondly heat exchanged to be condensed to liquid refrigerant, which is combined with the liquid refrigerant condensed from the low-pressure refrigerant at the downstream part of the capillary 14 via the tube 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser device capable of efficiently condensing a high pressure refrigerant in a mixed refrigerant together with a low pressure refrigerant.

[0002]

2. Description of the Related Art Generally, in an air conditioner, as shown in FIG. 3, a refrigerant compressed by a compressor 51 is condensed by a condenser 52, evaporated by an evaporator 53, and then returned to the compressor 51. It is designed to repeat a cycle. In addition, 54 is a capillary and 55 is an expansion valve.

As the above-mentioned refrigerant, a mixed refrigerant of R32 / R134a = 1: 1, for example, has recently been used as an alternative CFC for R-22, and R32 is a high-pressure refrigerant.
R134a is a low pressure refrigerant.

[0006] The condenser 52 supplies the gas refrigerant supplied from the compressor 51 to the evaporator 53 via the expansion valve 55 by condensing the gas refrigerant by heat exchange into a liquid refrigerant.

[0005]

However, in the conventional condenser 52, when the high pressure refrigerant in the mixed refrigerant cannot be sufficiently condensed, the high pressure refrigerant (gas) accumulates in the condenser 52 and the high pressure rises. There was a problem.

There is also a problem that the capacity of the condenser must be extremely large in order to sufficiently condense the high pressure refrigerant together with the low pressure refrigerant.

Therefore, an object of the present invention is to provide a condenser device capable of efficiently condensing a high pressure refrigerant in a mixed refrigerant.

[0008]

In order to achieve the above object, the invention of claim 1 is a condenser device for condensing a mixed refrigerant, wherein the inlet side pipes 8a, 9a, 28a, 29a are provided.
And upper side condenser parts 8 and 28 and lower side condenser parts 9, which have outlet side pipes 8b, 9b, 28b and 29b, respectively.
29 and the outlet side pipe 9 of one of the condenser parts 9 and 28
b, 28b, one of the condenser parts 9, 2
The uncondensed gas refrigerant in the mixed refrigerant supplied to No. 8 does not easily pass through the throttle means 14 and 34, and the throttle means 1 described above.
Outlet side piping 9b, 28 connected to the upstream part of 4, 34
b is the inlet side piping 8a, 2 of the other condenser part 8, 29
First pipe 1 connected to 9a and extending in the vertical direction
6, 36, and second pipes 17, 37 connecting the outlet side pipes 8b, 29b of the other condenser part 8, 29 to the pipes downstream of the throttle means 14, 34. I am trying.

Further, in the invention of claim 2, in the condenser device according to claim 1, the mixed refrigerant is supplied from the inlet side pipe 9a of the lower condenser part 9.

The invention according to claim 3 is the condenser device according to claim 1, wherein the upper condenser part 28
The mixed refrigerant is supplied from the inlet side pipe 28a of the above, and the outlet side pipe 2 of the upper condenser part 28
The connecting portion between 8b and the first pipe 36 is the outlet side pipe 28b.
It is characterized in that it has a curved portion 36a which is curved so as to project further upward.

[0011]

According to the present invention, when the mixed refrigerant is supplied from the inlet side pipes 9a, 28a of the one condenser section 9, 28 to the one condenser section 9, 28, the one of the condenser sections 9, 28 contains the mixed refrigerant. The low-pressure refrigerant is condensed by heat exchange and smoothly passes as a liquid refrigerant through the throttle means 14 and 34 connected to the outlet side pipes 9b and 28b.

Further, since the high-pressure refrigerant in the mixed refrigerant that has not been condensed in one of the condenser portions 9 and 28 does not easily pass through the throttle means 14 connected to the outlet side pipes 9b and 28b as a gas refrigerant, the outlet side pipes After passing through the first pipes 16 and 36 connected to 9b, the other condenser unit 8,
It is supplied from the inlet side pipes 8a, 29a of 29 to the other condenser parts 8, 29.

The high-pressure refrigerant supplied to the other condenser portions 8 and 29 is condensed by the second heat exchange, and is discharged as liquid refrigerant from the outlet side pipes 8b and 29b to the second pipes 17 and 3.
7, and joins with the liquid refrigerant of the low-pressure refrigerant at the downstream part of the throttle means 14, 34 connected to the outlet side pipes 9b, 28b of the one condenser part 9, 28.

As a result, the high-pressure refrigerant in the mixed refrigerant is condensed twice, so that the high-pressure refrigerant does not accumulate in the condenser device and the high pressure does not rise.

Further, since the uncondensed high pressure refrigerant is not supplied to the evaporator, the evaporation performance is improved.

Further, since heat is exchanged twice between the upper and lower condenser parts, the high-pressure refrigerant is also sufficiently condensed, so that a large-capacity condenser device becomes unnecessary.

On the other hand, if the mixed refrigerant is supplied from the inlet side pipe 9a of the lower condenser part 9 as in claim 2, it passes through the first pipe 16 and then from the inlet side pipe 8a of the upper condenser part 8. High-pressure refrigerant is supplied to the upper condenser section 8. Therefore, when the condenser portions 8 and 9 are defrosted, the lower condenser portion 9 is defrosted in order, so that even if the ice that has frosted on the upper condenser portion 8 drops on the lower condenser portion 9, the ice will be on the lower condenser portion 9. There is no risk of stacking.

Further, as described in claim 3, by supplying the mixed refrigerant from the inlet side pipe 28a of the upper condenser portion 28,
When the connecting portion of the outlet side pipe 28b of the upper condenser portion 28 and the first pipe 36 is formed in the curved portion 36a which is curved so as to protrude above the outlet side pipe 28b, the high pressure that is not condensed in the upper condenser portion 28 is formed. The refrigerant needs to pass upward only through the curved portion 36a between the outlet side pipe 28b and the first pipe 36, so that the head difference is small and the pressure loss is small.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

[First Embodiment] FIG. 1 shows a condenser device 7 according to a first embodiment. The condenser device 7 is connected between the compressor 1 and the expansion valve 5.

The condenser device 7 has an upper condenser portion 8 at an upper position and a lower condenser portion 9 at a lower position.

In the first embodiment, the upper condenser portion 8 has an inlet side pipe 8a on the right side in the figure and an outlet side pipe 8b on the left side. Also, the lower condenser part 9
Has an inlet side pipe 9a on the left side and an outlet side pipe 9b on the right side.

A header 10 is connected to the outlet side pipe 8b of the upper condenser portion 8, and a header 11 is connected to the inlet side pipe 9a of the lower condenser portion 9.

An outlet side pipe 12 from the compressor 1 is connected to a header 11 connected to an inlet side pipe 9a of the lower condenser section 9. The outlet side pipe 9b of the lower condenser part 9 is connected to the liquid reservoir pipe 13, and the liquid reservoir pipe 13 is connected to a capillary 14 as a throttle means through which a gas refrigerant does not easily pass. In addition, the capillary 14 is an evaporator via a merging pipe 15 via the expansion valve 5.
(Not shown).

In the upstream part of the capillary 14, the upper and lower parts
The first pipe 16 extending in the (vertical) direction connects the outlet side pipe 9b of the lower condenser part 9 and the inlet side pipe 8a of the upper condenser part 8. This first pipe 16
Functions as a gas vent pipe.

A second pipe 17 having a check valve 18
The header 10 connected to the outlet side pipe 8b of the upper condenser part 8 is connected to the merging pipe 15 at an intermediate portion between the capillary 14 and the expansion valve 15. The check valve 18 allows the refrigerant to pass only in the direction of the arrow y1 in the figure.

A third pipe 20 having a check valve 19 is also provided.
Connects the header 10 connected to the outlet side pipe 8b of the upper condenser portion 8 to the middle of the outlet side pipe 12. The check valve 19 allows the refrigerant to pass only in the direction of the arrow y2 in the figure.

With the configuration of the first embodiment, the compressor 1
The refrigerant mixture is supplied from the inlet side pipe 9a to the lower condenser portion 9 through the outlet side pipe 12 and the header 11. Then, in the lower condenser part 9, mainly the low-pressure refrigerant in the mixed refrigerant is condensed by heat exchange, so that
As shown in (4), the low-pressure refrigerant-rich liquid refrigerant a containing a large amount of low-pressure refrigerant smoothly passes through the capillary 14 from the outlet side pipe 9b and the liquid reservoir pipe 13 and reaches the confluent pipe 15.

Further, mainly the high-pressure refrigerant that has not been condensed in the lower condenser portion 9 is unlikely to pass through the capillary 14 of the outlet side pipe 9b as the gas refrigerant b, so that FIG.
As shown in (B), it smoothly passes through the first pipe 16 connected to the outlet side pipe 9b in the upstream part of the capillary 14 and is supplied to the upper condenser part 8 from the inlet side pipe 8a of the upper condenser part 8. It

The high-pressure refrigerant (gas refrigerant) supplied to the upper condenser portion 8 is condensed by the second heat exchange in the upper condenser portion 8 after the lower condenser portion 9 to become a liquid refrigerant. The liquid refrigerant passes through the outlet side pipe 8b, the header 10 and the second pipe 17 in order, and merges with the liquid refrigerant of the low pressure refrigerant in the confluent pipe 15 between the capillary 14 and the expansion valve 5 to expand the expansion valve 5 Is supplied to the evaporator via.

As described above, the high-pressure refrigerant in the mixed refrigerant supplied from the compressor 1 is efficiently condensed together with the low-pressure refrigerant in the lower condenser section 9 and the upper condenser section 8, so that the high-pressure refrigerant is stored in the condenser device 7. High-pressure refrigerant does not accumulate, and high-pressure rise does not occur. Therefore, the condensing performance of the condenser device 7 becomes good.

Further, since the high-pressure refrigerant (gas refrigerant) that has not been condensed in the condenser device 7 is not supplied to the evaporator, the evaporation performance of the evaporator is improved.

Further, since the high-pressure refrigerant is sufficiently heat-exchanged and condensed twice in the lower condenser section 9 and the upper condenser section 8, a large-capacity condenser device is not necessary.

Furthermore, since the mixed refrigerant is supplied to the lower condenser section 9 and the high-pressure refrigerant is supplied to the upper condenser section 8, when the condenser sections 9 and 8 are defrosted, the lower condenser section 9 is defrosted in order. . Therefore, when the ice that has frosted on the upper condenser portion 8 falls on the lower condenser portion 9, defrosting of the lower condenser portion 9 is proceeding, so there is no possibility that ice accumulates on the lower condenser portion 9.

[Second Embodiment] FIG. 2 shows a condenser device 27 according to a second embodiment. This condenser device 2
7 is connected between the compressor 21 and the expansion valve 35.

The condenser device 27 has an upper condenser portion 28 at an upper position and a lower condenser portion 29 at a lower position.

The upper condenser portion 28 has an inlet side pipe 28a on the left side and an outlet side pipe 28b on the right side in the figure. Further, the lower condenser part 29 has an inlet side pipe 29a on the right side in the figure, and an outlet side pipe 29a on the left side.
b.

The inlet side pipe 28a of the upper condenser part 28 and the outlet side pipe 29 of the lower condenser part 29
Headers 30 and 31 are connected to b.

The outlet side pipe 32 of the compressor 21 is connected to the header 30 which is connected to the inlet side pipe 28a of the upper condenser section 28. On the other hand, a liquid reservoir pipe 33 is connected to the outlet side pipe 28b of the upper condenser portion 28, and a capillary 34 as a throttle means through which a gas refrigerant does not easily pass is connected to the liquid reservoir pipe 33. A merging pipe 35 is connected to the capillary 34, and the merging pipe 35 is connected to an evaporator (not shown) via an expansion valve 25.

First pipe 3 extending vertically (vertically)
6 connects the outlet side pipe 28b of the upper condenser part 28 to the inlet side pipe 29a of the lower condenser part 29 at the upstream portion of the capillary 34. The first pipe 36 functions as a gas vent pipe. Also, check valve 3
The second pipe 37 having the header 8 connected to the outlet-side pipe 29 b of the lower condenser part 29 has a joint pipe 35 at an intermediate portion between the capillary 34 and the expansion valve 35.
Connected to The check valve 38 allows the refrigerant to pass only in the direction of the arrow y4 in the figure.

A third pipe 40 having a check valve 39 is also provided.
Connects the header 31 connected to the outlet side pipe 29b of the lower condenser part 29 to the middle of the outlet side pipe 32 of the compressor 21. The check valve 39 allows the refrigerant to pass only in the direction of the arrow y3 in the figure.

Outlet side pipe 28 of the upper condenser section 28
As shown in detail in FIG. 2B, the connecting portion between the b and the first pipe 36 has the connecting end of the first pipe 36 at the outlet side pipe 28.
It has a curved portion 36a that is curved so as to project slightly above the upper portion of b. Then, the first pipe 36 is
The curved portion 36a extends downward.

In the configuration of the second embodiment, the compressor 2
1, the mixed refrigerant is supplied to the upper condenser portion 28 from the inlet side pipe 28a through the outlet side pipe 32 and the header 30. Then, mainly the low-pressure refrigerant in the mixed refrigerant is condensed by the heat exchange in the upper condenser portion 28, and FIG.
As shown in, the low-pressure refrigerant-rich liquid refrigerant a containing a large amount of low-pressure refrigerant smoothly passes through the capillary 34 from the outlet-side pipe 28b and the liquid reservoir pipe 33 to reach the confluent pipe 35.

Further, mainly the high-pressure refrigerant that has not been condensed in the upper condenser portion 28 hardly passes through the capillary 34 connected to the outlet side pipe 28b. Therefore, as shown in FIG. 2 (B), this high-pressure refrigerant smoothly passes through the first pipe 36 connected to the outlet side pipe 28b upstream of the capillary 34 as the gas refrigerant b, and then passes through the first condenser 36 of the lower condenser portion 29. From the inlet side pipe 29a to the lower condenser part 2
9.

The high-pressure refrigerant (gas refrigerant) supplied to the lower condenser section 29 is condensed into a liquid refrigerant by the second heat exchange in the lower condenser section 29 following the upper condenser section 28. This liquid refrigerant is used in the outlet pipe 29.
After passing through b, the header 31, and the second pipe 37, the liquid pipe of the low-pressure refrigerant merges in the joint pipe 35 between the capillary 34 and the expansion valve 25. The merged liquid refrigerant is used for the expansion valve 5
Is supplied to the evaporator via.

As described above, also in the second embodiment, as in the first embodiment, the high pressure refrigerant in the mixed refrigerant supplied from the compressor 21 is distributed twice between the upper condenser section 28 and the lower condenser section 29. Be condensed. Therefore, the high pressure refrigerant does not accumulate in the condenser device 27, and the high pressure does not rise.

Further, since the high-pressure refrigerant (gas refrigerant) that has not been condensed by the condenser device 27 is not supplied to the evaporator (not shown), the evaporation performance of the evaporator is improved.

Further, the high pressure refrigerant is used in the upper condenser section 2.
Since it is sufficiently condensed twice by 8 and the lower condenser part 29, a large-capacity condenser device is unnecessary.

Furthermore, the curved portion 3 is provided at the connecting portion between the outlet side pipe 28b of the upper condenser portion 28 and the first pipe 36.
6a is formed, the high-pressure refrigerant (gas refrigerant b) that has not been condensed in the upper condenser portion 28 is
It is sufficient to pass only a upward, and after this passage, the first pipe 36 can smoothly pass downward. Therefore, according to this embodiment, since the head difference h is small, the pressure loss is small.

[0050]

As is apparent from the above description, in the condenser device according to the first aspect of the present invention, the low-pressure refrigerant in the mixed refrigerant supplied to one of the condenser parts is condensed by heat exchange, and the condensed refrigerant is used as a liquid refrigerant. And the high-pressure refrigerant in the mixed refrigerant that has not been condensed in one condenser section is supplied to the other condenser section.
A second heat exchange is performed to condense the liquid refrigerant into a liquid refrigerant and join the condensed low-pressure refrigerant with the liquid refrigerant at the downstream portion of the capillary.

Therefore, the high-pressure refrigerant in the mixed refrigerant can be efficiently condensed together with the low-pressure refrigerant, so that the high-pressure refrigerant does not accumulate in the condenser device and the high pressure does not rise. Therefore, the condensation performance is improved. Further, the high-pressure refrigerant that has not been condensed is not supplied to the evaporator, so that the evaporation performance is improved.

Further, since heat is exchanged twice between the upper and lower condenser parts, the high-pressure refrigerant can be sufficiently condensed, and therefore a large-capacity condenser device is not necessary.

Further, as in the invention of claim 2, the mixed refrigerant is supplied from the lower condenser part,
High-pressure refrigerant is supplied to the upper condenser part. Therefore, when defrosting each condenser portion, the lower condenser portion can be defrosted earlier than the upper condenser portion.
Therefore, even if ice frosted on the upper condenser portion falls on the lower condenser portion, there is no possibility of being piled on the ice on the lower condenser portion.

Furthermore, in the invention of claim 3, the mixed refrigerant is supplied from the upper condenser part so that the connecting portion between the outlet side pipe of the upper condenser part and the first pipe protrudes above the outlet side pipe. It has a curved portion that is curved. Therefore, the high-pressure refrigerant that has not been condensed in the upper condenser portion needs to pass upward only through the curved portion. That is, since the head difference can be reduced, the pressure loss is reduced.

[Brief description of the drawings]

FIG. 1 (A) is a configuration diagram of a condenser device according to a first embodiment of the present invention, and FIG. 1 (B) is an enlarged cross-sectional view of a connecting portion between an outlet side pipe of a lower condenser part and a first pipe. It is a figure.

FIG. 2 (A) is a configuration diagram of a condenser device according to a second embodiment, and FIG. 2 (B) is an enlarged cross-sectional view of a connection portion between the outlet side pipe of the upper condenser portion and the first pipe. .

FIG. 3 is a configuration diagram of a conventional condenser device.

[Explanation of symbols]

1, 21 ... Compressor, 53 ... Evaporator, 5, 25 ... Expansion valve, 7, 27 ... Condenser device, 8, 28 ... Upper condenser part, 8a, 28a ... Inlet side piping, 8b, 28b ... Outlet side piping, 9 , 29 ... Lower condenser part, 9a, 29a
… Inlet side piping, 9b, 29b… Outlet side piping, 14,34…
Capillaries, 16, 36 ... First piping, 36a ... Curved portions, 17, 37 ... Second piping.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Takegami 1304 Kanaoka-machi, Sakai City, Osaka Daikin Industries, Ltd.Kanaoka Factory, Sakai Manufacturing Co., Ltd. (72) Hidehiko Ogawa 1304, Kanaoka-machi, Sakai City, Osaka Daikin Industries, Ltd. Sakai Factory Kanaoka Factory

Claims (3)

[Claims] 1. In a condenser device for condensing a mixed refrigerant, inlet side pipes (8a, 9a, 28a, 29a) and outlet side pipes (8
b, 9b, 28b, 29b) respectively having an upper condenser portion (8, 28) and a lower condenser portion (9, 29), and an outlet side pipe (9b, 2) of one condenser portion (9, 28).
8b), and the one capacitor part (9, 28) above
The uncondensed gas refrigerant in the mixed refrigerant supplied to the throttle means (14, 34) is less likely to pass through, and the outlet side pipes (9b, 28b) connected to the upstream part of the throttle means (14, 34). ) To the other condenser part (8, 2
The first pipe (16, 36) extending in the vertical direction connected to the inlet side pipe (8a, 29a) of 9) and the outlet side pipe (8) of the other condenser part (8, 29).
b, 29b) and a second pipe (17, 37) connecting the pipe downstream of the throttle means (14, 34). 2. The condenser device according to claim 1, wherein the mixed refrigerant is supplied from the inlet side pipe (9a) of the lower condenser portion (9). 3. The condenser device according to claim 1, wherein the mixed refrigerant is supplied from an inlet side pipe (28a) of the upper condenser part (28), and the mixed refrigerant is supplied to the upper condenser part (28). The connecting part between the outlet side pipe (28b) and the first pipe (36) has a curved portion (36a) which is curved so as to protrude above the outlet side pipe (28b). apparatus.