JP2806379B2 - Refrigerant condenser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant condenser used for a refrigeration cycle, and is used for an air conditioner for an automobile.

[0002]

2. Description of the Related Art A refrigeration cycle includes a receiver (gas-liquid separator) for separating gas refrigerant and liquid refrigerant and storing excess refrigerant. The conventional receiver is provided separately from the refrigerant condenser, and is connected to the refrigerant condenser by using a refrigerant pipe. Also, when a subcooler for supercooling the liquid refrigerant flowing out of the receiver is provided, this subcooler is provided separately and connected to the refrigerant condenser and the receiver by using refrigerant piping.

[0003]

However, conventionally, it is necessary to provide a refrigerant pipe for connecting the receiver and the subcooler to the refrigerant condenser and an installation space. In addition, since a refrigerant pipe for connecting the receiver and the subcooler to the refrigerant condenser and connection means such as a connection joint are required, the production cost of the refrigeration cycle has been increased.

[0004] It is an object of the present invention to provide a receiver and a subcooler,
It is an object of the present invention to provide a heat exchanger that eliminates a refrigerant pipe for connecting to a refrigerant condenser to reduce the size of a refrigeration cycle and reduces the manufacturing cost of the refrigeration cycle.

[0005]

The present invention uses the following technical means to achieve the above object. According to the first aspect of the present invention, a partition plate for partitioning a plurality of tubes into a condenser and a supercooling unit is disposed in the tank, and the partition plate is connected between the condenser unit and the supercooling unit. And a receiver (gas-liquid separator) for separating the refrigerant flowing out of the unit into a gas refrigerant and a liquid refrigerant and sending the liquid refrigerant to the supercooling unit. Then, the receiver and the tank were integrally formed.

According to the second aspect of the present invention, the condensing inlet tank and the condensing outlet tank to which both ends of the condensing tube are connected, and the refrigerant flowing out of the condensing outlet tank are separated into gas refrigerant. A supercooling inlet tank and a supercooling outlet tank to which both ends of a supercooling tube are connected, wherein the condensing outlet tank, the receiver and the supercooling tube are connected to each other. The cooling inlet tank was integrally formed.

[0007] With the above configuration, there is no need for a refrigerant pipe for connecting the refrigerant condenser to the receiver and the subcooler, and connection means such as a connection joint, which have been conventionally used. As a result, by eliminating the connection piping, the installation space of the refrigeration cycle can be reduced as compared with the related art. Further, since the connecting means is not required, the manufacturing cost of the refrigeration cycle can be reduced.

[0008]

FIG. 1 and FIG. 2 show an embodiment of the present invention. a-2) Description of the plurality of tubes 2. In the present embodiment, ten cylindrical tubes 2 are provided, and four first condensing tubes 6, three second condensing tubes 7, and two third condensing tubes 8 are provided from below. And a single supercooling tube 26 that imparts a degree of supercooling to the refrigerant.

B-2) Explanation of the fin 3 The fins 3 of the present embodiment are in the form of a large number of thin plates, and each tube 2 is penetrated. (Note that the tube 2 may be formed flat and the fins 3 may be provided in a corrugated shape.) C-2) Description of the first tank 4.

The inside of the first tank 4 is divided into an inflow chamber 13, a second return chamber 14, and an outflow chamber 22 from below by a separator 10 (partition plate). The lower cap 11 is connected to an inflow pipe 12 to which a refrigerant pipe connected to a discharge port of the refrigerant compressor is connected.
Further, an outflow pipe 30 connected to a cooling pipe connected to a decompression device is connected to the upper cap 11.

D-2) Description of the second tank 5 In the second tank 5 of the present embodiment, a small small cylinder 28 communicating with the first condensation tube 6 and the second condensation tube 7 is arranged inside a cylinder 27 connected to the end of the tube 2. It has a heavy pipe structure (see FIG. 4). And the cylinder 27 is
The inside of the cylinder 27 divided by the small cylinder 28 communicates with the third condensation tube 8 and serves as the storage chamber 21. On the upper side of the cylindrical body 27, a subcooling inflow chamber 29 for guiding the refrigerant to the supercooling tube 26 is defined by the separator 17 (partition plate). The supercooled inflow chamber 29 communicates with the lower storage chamber 21 via the delivery pipe 19. The delivery pipe 19
Has a lower side opening at the bottom of the storage room 21 and the storage room 2
It is provided so that only the liquid-phase refrigerant among the refrigerants stored in 1 is guided to the supercooler 25 (supercooler). The supercooler 25 is provided in the subcooling inflow chamber 2.
9, a supercooling tube 26 and an outflow chamber 22.

The cap 18 at the upper end of the second tank 5
Is provided with a sight glass 31. The sight glass 31 is for visually confirming the state of the refrigerant guided from the delivery pipe 19 to the subcooling inflow chamber 29 from the outside. In the present embodiment, the condensing section according to claim 1 of the present application includes the inflow chamber 13, the first condensing tube 6, and the first return chamber 2.
4, second condensation tube 6, second return chamber 14, third
The condenser tube 7 is constituted by a part of the cylindrical body 27. The subcooling section is constituted by the subcooling inflow chamber 29, the subcooling tube 26, and the outflow chamber 22. The gas-liquid separator includes a storage chamber 21 and a delivery pipe 19.

In the present embodiment, the inlet tank for condensation according to claim 2 of the present application is constituted by the inflow chamber 13, the upper part of the first return chamber 24, and the upper part of the second return chamber 14.
The outlet tank for condensation is located at the lower part of the first return chamber 24,
The third part of the lower part of the second return chamber 14 and the inside of the cylindrical body 27
It is constituted by a portion to which the condensation tube 8 is connected. The subcooling inlet tank is constituted by the subcooling inflow chamber 29, and the subcooling outlet tank is constituted by the outflow chamber 22.

Next, the flow of the refrigerant in the refrigerant condenser 1 of this embodiment will be briefly described. The refrigerant flowing into the inflow chamber 13 from the inflow pipe 12 is supplied to the first condensing tube 6 and the first return chamber 2.
4, liquefied and condensed through the second condensing tube 7, the second return chamber 14, and the third condensing tube 8, and flow into the storage chamber 21. The refrigerant flowing into the storage chamber 21 is gas-liquid separated, and only the liquid-phase refrigerant flows into the supercooling inflow chamber 29 via the delivery pipe 19. The refrigerant flowing into the subcooling inflow chamber 29 passes through the supercooling tube 26, and is sent from the outflow pipe 30 to the outside of the first tank 4 via the outflow chamber 22. The refrigerant flowing out of the outflow pipe 30 is supplied to the supercooling tube 2
On passing through 6, a degree of supercooling is provided. As a result, the cooling capacity of the refrigeration cycle is improved.

Conventionally, in a refrigeration cycle having a supercooler, the refrigerant condenser and the receiver are connected by a refrigerant pipe, and the receiver and the supercooler are connected by a refrigerant pipe. It became complicated and difficult to mount, and required a large installation pace. However, in this embodiment, the refrigerant piping connecting the refrigerant condenser and the receiver and the refrigerant piping connecting the receiver and the super cooler 25 are unnecessary. Therefore, mounting becomes easy and the mounting space is small. There is an effect that the cost can be reduced by eliminating the refrigerant pipe.

In the above example, the tube 2 has a cylindrical shape.
Although the fins 3 are formed in a thin plate shape, as shown in FIG. 3, the tubes 2 may be formed in a flat shape, and the liquid fins 3 may be disposed therebetween.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a refrigerant condenser of an automotive air conditioner.

FIG. 2 is a sectional view of a tank of the refrigerant condenser shown in FIG. 1;

FIG. 3 is a partially sectional front view showing a modification of the refrigerant condenser.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerant condenser 2 Tube 4 1st tank 5 2nd tank 19 Outflow pipe 21 Storage room

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tadashi Nakabo 1-1-1, Showa-cho, Kariya-shi, Aichi Pref. Denso Corporation (72) Inventor Yoshio Miyata 1-1-1, Showa-cho, Kariya-shi, Aichi pref. 72) Inventor Ken Matsunaga 1-1-1 Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Co., Ltd. 1-1 1-1 Showa-cho, Kariya-shi, Japan Inside DENSO CORPORATION (56) References Japanese Utility Model 2-13954 (JP, U) Japanese Utility Model 47-42049 (JP, Y1) (58) Field surveyed (Int.Cl) . ^6, DB name) F25B 39/00 - 39/04 F28D 1/00 - 9/04

Claims (2)

(57) [Claims] 1. A plurality of tubes through which a refrigerant flows, a first tank to which one ends of the plurality of tubes are connected, a second tank to which the other ends of the plurality of tubes are connected, A partition plate arranged in one of the first tank and the second tank to partition the plurality of tubes and the tank into a condensing section and a supercooling section; And a gas-liquid separator for separating the refrigerant flowing out of the condensing unit into a gas refrigerant and a liquid refrigerant, and sending the liquid refrigerant to the supercooling unit. A refrigerant condenser, wherein the first tank or the second tank is formed integrally. 2. A condensing tube through which a refrigerant circulates and exchanges heat with external air to condense the refrigerant, a condensing inlet tank and a condensing outlet tank to which both ends of the condensing tube are connected. A gas-liquid separator that separates the refrigerant flowing out of the condensing outlet tank into a gas refrigerant and a liquid refrigerant, and sends out the liquid refrigerant; and a subcooling inlet into which the liquid refrigerant flowing out of the gas-liquid separator flows. A tank, one end of which is connected to the supercooling inlet tank, a subcooling tube for subcooling the liquid refrigerant, and a subcooling outlet tank to which the other end of the supercooling tube is connected, The refrigerant condenser, wherein the condensing outlet tank, the gas-liquid separator, and the subcooling inlet tank are integrally formed.