JP3536247B2 - Receiver tank integrated condenser - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver tank integrated capacitor in which a receiver tank constituting a part of a cooling cycle is integrally provided adjacent to a capacitor. 2. Description of the Related Art A receiver tank of this type is known, for example, from JP-B-53-6737. In this method, the inside of the receiver tank is divided into an inlet-side communication chamber, a storage room, and an outlet-side communication chamber by a partition wall formed integrally with the peripheral wall, and a condenser tube is connected to a lower end of the inlet-side communication chamber to connect the condenser. The refrigerant that has passed is guided upward through the communication chamber on the inlet side, made to make a U-turn at the upper part of the partition wall, and dropped below the storage chamber, and the liquid refrigerant stored in the storage chamber is caused to flow through the communication chamber on the outlet side at a predetermined pressure. Through the refrigerant outlet. [0003] However, according to the above-described receiver tank, the partition walls forming the inlet-side communication chamber, the storage chamber, and the outlet-side communication chamber are integrally formed by extrusion or the like. In order to communicate the inlet side communication room and the storage room or the storage room and the outlet side communication room, a complicated process such as shaving off a part of the partition wall is required, and the refrigerant is supplied from the upper end of the inlet side communication room. Since it is a type that is directly poured into the storage chamber, there is a disadvantage that gas-liquid separation cannot be performed satisfactorily. Accordingly, an object of the present invention is to provide a condenser integrated with a receiver tank which solves the above-mentioned problems and improves gas-liquid separation. Means for Solving the Problems [0005] The gist of the present invention is to provide a pair of header pipes arranged to face each other, a plurality of tubes communicating with the pair of header pipes, A condenser having a fin interposed between the tubes , flowing refrigerant from the upper part of the header pipe, finally guiding the flowed refrigerant to the lower part of one of the header pipes, and then transmitting the refrigerant to the outside from the refrigerant discharge part. When,
A receiver tank integrated condenser including a receiver tank having a refrigerant storage space formed in a substantially cylindrical portion and extending vertically adjacent to the one header pipe, wherein the receiver tank includes the tube It is arranged at a position that does not block the flow of air passing therethrough, and in order to suppress the conduction of heat from the header pipe, prevent reheating of the refrigerant, and keep the refrigerant in a liquid state, a gap is formed between the header pipe. While being held, they are partially connected by furnace brazing , and the length in the central axis direction is formed to be equal to or less than the length of the header pipe, and connects the refrigerant storage space and the refrigerant delivery unit. And a refrigerant outlet means that opens at the lower part of the refrigerant storage space and allows the refrigerant to flow out from the lower part of the refrigerant storage space. Via the communicating portion is to flow into the refrigerant storage space in the direction perpendicular to the central axis of the receiver down tank. Therefore, since the receiver tank is partially connected to the header pipe with a gap provided between the receiver tank and the header pipe, heat conduction from the header pipe is suppressed to prevent reheating of the refrigerant, thereby allowing the refrigerant to be cooled. Can be kept in condition. The refrigerant discharged from the refrigerant discharge section flows into the refrigerant storage space through the communication section in a direction perpendicular to the center axis of the receiver tank , and then flows toward the lower part of the refrigerant storage space.
You will be turning around. As a result, the gaseous refrigerant that could not be condensed before reaching the refrigerant delivery section and remained in the liquid refrigerant
Is easily separated in the refrigerant storage space. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a condenser 1 and a receiver tank 2 which constitute a cooling cycle used in a cooling system for an automobile or the like. The condenser 1 liquefies the refrigerant compressed to a high pressure by a compressor (not shown) by a heat radiation action, and is entirely made of a metal such as aluminum.
As shown in FIG. 1, a flat tube 5 is interposed between a pair of header pipes 3 and 4 arranged opposite to each other. The header pipes 3 and 4 have a substantially semicircular cross section.
The two pipe members are fitted together to form a cylinder, the ends of which are closed by caps 7a to 7d, and the inside of each of the header pipes 3 and 4 has a connection hole formed in the side face of each of the header pipes 3 and 4. Are connected by a flat tube 5 which is assembled through the flat tube 5. A high-pressure pipe 9 connected to a compressor through a pipe connection hole 8 is attached to a side surface near the upper end of one header pipe 3. The three header portions 3a, 3 which are arranged closer to each other, and
A partition wall 10 that divides the partition wall into b and 3c is provided. In this embodiment, ten flat tubes 5 for the upper header portion 3a, 15 flat tubes 5 for the middle header portion 3b, and six flat tubes for the lower header portion 3c. 5 are respectively connected. On the other hand, one partition wall 10 is disposed in the middle of the other header pipe 4 in the middle, and the inside of the pipe is divided into two header sections 4a and 4b of an upper section and a lower section. In the above, 18 flat tubes 5 are provided for the upper header section 4a, and 1 flat tube 5 is provided for the lower header section 4b.
The three flat tubes 5 are respectively connected. still,
At the upper and lower ends of the condenser, mounting plates 11 and 12 having both ends fixed to header pipes 3 and 4 are provided on the flat tube 5 via fins 6. The refrigerant sent from the compressor via the high-pressure pipe 9 is formed on the other header pipe 4 via the flat tube 5 from the upper header section 3a formed on the one header pipe 3. It flows into the upper header section 4a where it is located, moves downward here, and again reaches the middle header section 3b formed on one header pipe 3 via the flat tube 5. Further, the refrigerant that has moved downward here flows into the lower header portion 4b formed on the other header pipe 4 via the flat tube 5, and after moving downward, the refrigerant flows into the one header pipe via the flat tube 5. It is sent to the header part 3c for formation. The receiver tank 2 is clearly shown in FIG.
At a position that does not block the flow of air passing between the tubes.
In this example, a container 13 is provided which is fixed to one header pipe 3 of the capacitor 1 by brazing. The container 13 has an elongated cylindrical shape substantially equal to the length of the header pipe 3, and both ends thereof are covered with the lid 1.
The refrigerant storage space A is defined by being closed by the insides 4 and 15. In addition, one end is connected to the lower header portion 3c formed in the one header pipe 3 via the lower end cap 7b in the refrigerant storage space A inside the container 13, and the lower end cover of the container 13 is closed. A guide tube 16 is provided which extends upward substantially at the center of the container via a body 15 and which has the other end in contact with the lid 14 at the upper end of the container. This guide tube 16
Thus, a communication portion is formed, and the lid 14 at the upper end holds down the guide tube 16 by a fitting portion 14a formed by depressing a central portion thereof in an annular shape. At substantially the center of the container, a filter 18 positioned by a flange portion 17 formed in the guide tube 16 and a net-shaped drier 19 provided above the filter 18 are arranged. This dryer 19
Is a bottomed spacer 20 inserted from the top of the container 13.
And is held between the filter 18 in a somewhat compressed state. The filter 18 is made of, for example, metal or ceramic. The dryer 19 is made of synthetic zeolite or the like, and is made of a material that does not melt even at 600 ° C. A number of small holes 21 are formed in a bottom portion 20a of the spacer 20 which contacts the dryer 19, and a number of small holes 22 are also formed around the guide tube 16 from the upper portion of the dryer to the lid 14 at the upper end. Around the guide tube 16, there is formed a flow passage 24 through which the refrigerant moves downward from the upper portion of the container to the refrigerant outflow tube 23 provided on the side wall near the lower end of the container. The refrigerant sent to the lower header portion 3c formed in one header pipe 3 of the condenser is guided by the guide tube 16 to the upper portion of the container 13, and the refrigerant is transferred to the upper portion of the container 13. The refrigerant flows out of the small holes 22 into the refrigerant storage space A in a direction perpendicular to the central axis of the receiver tank. The refrigerant flowing out of the small holes 22 formed in the upper part of the dryer passes directly through the dryer 19, but the small holes 22 formed in the upper part flow out into the spacer 20, and pass through the small holes 21 of the spacer 20. to go into. And
The liquid refrigerant that has passed through the dryer 19 and the filter 18 and has been separated from the bubbles is once stored below the container and sent to an expansion valve (not shown) via the refrigerant outflow pipe 23. On this occasion,
The refrigerant flowing into the refrigerant storage space A flows in a direction perpendicular to the central axis of the receiver tank via the guiding pipe 16 ,
Later, the vehicle will turn toward the lower part of the refrigerant storage space.
You. For this reason, it cannot be condensed by the time it reaches the refrigerant delivery section,
The gaseous refrigerant remaining in the liquid refrigerant is
It is easy to be separated. To assemble the receiver tank 2, the guide tube 16 and the refrigerant outlet tube 23 are inserted and fixed into the container 13 at the same time when the condenser 1 is assembled, and the filter 18 and the dryer 19 are introduced from above the container. What is necessary is just to fit around the drawing pipe 16, further fit the spacer 20 from above, attach the lid 14 on the upper end, and perform brazing in a furnace as it is. As described above, when the filter 18 and the dryer 1 are passed through the furnace integrally with the condenser 1, there is a possibility that the performance of the filter 18 or the dryer 19 may deteriorate or may be damaged.
9 does not have to worry because each uses heat-resistant material. FIGS. 3 and 4 show examples of assembling the receiver tank 2 according to the present invention. In the condenser 1 and the receiver tank 2 having the above-described configuration, one header pipe 3 of the condenser 1 and the container 16 of the receiver tank 2 are not integrally brazed, but are held and fixed via the heat insulating material 25. Is what it is. The reason for this configuration is that, since the temperature of the refrigerant sent from the compressor is high, the heat is directly transmitted to the receiver tank 2 via the condenser 1, and a part of the liquid condensed again in the container. This is because there is a risk of gasification. Similarly, there is a structure shown in FIGS. 5 and 6 as a structure for preventing the refrigerant stored in the receiver tank 2 from being reheated and keeping the refrigerant in a liquid state. In this embodiment, a predetermined gap is formed between the receiver tank 2 and the header pipe 3 through the brackets 26 provided on the upper and lower parts of the header pipe 3 of the condenser 1. Is held and fixed. The mounting of the condenser 1 and the receiver tank 2 by the bracket 26 may be performed by brazing in a furnace, or may be detachably held by screws or the like. As described above, according to the present invention,
The receiver tank is partially connected with a gap between the header pipe and the header pipe, so it suppresses heat conduction from the header pipe , prevents reheating of the refrigerant, and converts the refrigerant to a liquid state.
You can keep it. Further, since a communication portion that connects the refrigerant storage space and the refrigerant delivery portion of the condenser is provided, and the refrigerant flows into the refrigerant storage space in a direction perpendicular to the center axis of the receiver tank through the communication portion, Refrigerant storage
Gives large fluctuations in the flow direction to the refrigerant flowing into the storage space
To improve gas-liquid separation in the refrigerant storage space.
Becomes possible

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway sectional view showing a receiver tank according to the present invention and a capacitor provided with the same. FIG. 2 is a bottom view of the above. FIG. 3 is a front view showing another connection structure between the capacitor and the receiver tank. FIG. 4 is a bottom view of the above. FIG. 5 is a front view showing still another connection structure between the capacitor and the receiver tank. FIG. 6 is a bottom view of the above. [Explanation of Signs] 1 condenser 2 receiver tank 3, 4 header pipe 5 tube 6 fin 13 container 16 guide tube 22 small hole 23 refrigerant outflow tube

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 2-63215 (JP, U) JP-A 55-25562 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 43/00 F25B 39/04

Claims (1)

(57) [Claim 1] A pair of header pipes arranged opposite to each other, a plurality of tubes communicating with the pair of header pipes, and a fin interposed between the tubes. A condenser that has a refrigerant that flows in from the upper part of the header pipe, and that guides the refrigerant that has flowed in to the lower part of the one header pipe, and then sends the refrigerant to the outside from the refrigerant delivery part. And a receiver tank integrated with a receiver tank having a refrigerant storage space formed in a substantially cylindrical portion, wherein the receiver tank controls the flow of air passing between the tubes. It is arranged at a position where it is not blocked, and in order to suppress the conduction of heat from the header pipe, prevent reheating of the refrigerant, and keep the refrigerant in a liquid state, The while providing a gap which is partially connected in a furnace brazing, and with the length of the central axis direction is formed below the length of said header pipe, said accumulation zone wherein the refrigerant delivery section And a refrigerant outlet means that opens at the lower part of the refrigerant storage space and causes the refrigerant to flow out from the lower part of the refrigerant storage space. A condenser integrated with a receiver tank, wherein the condenser flows into the refrigerant storage space in a direction perpendicular to a central axis of the receiver tank through a portion.