JP3536248B2 - 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 flows directly into the storage room, there is a disadvantage that gas-liquid separation cannot be performed well.When the receiver tank is integrated with the condenser, the refrigerant flowing in the condenser causes the liquefied refrigerant in the receiver tank to be vaporized. This causes a problem that it is not changed. Therefore, in the present invention, the above problems are solved, the assembling work is simplified, the heat transfer is prevented, the refrigerant is prevented from being reheated, and the refrigerant is kept in a liquid state to improve gas-liquid separation. To provide a receiver tank integrated capacitor. According to a first aspect of the present invention, a condenser integrated with a receiver tank includes a pair of header pipes disposed to face each other and a plurality of header pipes communicating with the pair of header pipes. and having a tube and a fin which is interposed between the tube, or the upper header pipe
From the refrigerant flowing in, a condenser that is delivered to the outside from the refrigerant delivery unit after finally guiding the inflowed refrigerant to the lower part of one header pipe, and is vertically extended adjacent to the one header pipe, A receiver tank integrated condenser including a receiver tank having a refrigerant storage space formed in a substantially cylindrical portion, wherein the receiver tank is disposed at a position that does not block the flow of air passing between the tubes. At the lower part of the receiver tank, a communication part for connecting the refrigerant storage space and the refrigerant sending part is provided, and a refrigerant outlet opening at the lower part of the refrigerant storage space and allowing the refrigerant to flow out from the lower part of the refrigerant storage space. means and is provided, the one of the header pipe and the receiver tank are partially connected by furnace brazing the connecting portion, between and above them, said receiver Tan Together along the axial direction gap with a spacing of substantially uniform is formed of, the gap is a predetermined size required to keep the refrigerant in the liquid state to prevent reheating of the refrigerant (claim 1). [0006] According to this configuration, heat transfer from the header pipe to the receiver tank can be suppressed by the gap between the receiver tank and the header pipe, and the refrigerant can be kept in a liquid state. Also, the gap prevents the refrigerant from reheating and
By setting the dimensions necessary for maintaining the body state, the overall dimension of the capacitor in the left-right direction can be reduced. In addition, the receiver
Air flow to the condenser fins and tubes
Since it does not block, there is also the disadvantage of lowering the heat exchange efficiency
Does not wake up. 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 a container 1 fixed to one header pipe 3 of the condenser 1 by brazing.
3 is provided. The container 13 has an elongated cylindrical shape substantially equal to the length of the header pipe 3, and its both ends are covered by a lid 14,
The refrigerant storage space A is defined inside by being closed by 15. The lower header portion 3 c formed in the one header pipe 3 is provided in the refrigerant storage space A inside the container 13.
Is connected at one end via a cap 7b at the lower end, and extends upward substantially at the center of the container via a cover 15 at the lower end of the container 13, and the other end contacts the cover 14 at the upper end of the container. A tube 16 is provided. The upper lid 14 is
A fitting part 14a formed by depressing the center part in an annular shape.
The guide tube 16 is held down. 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 guiding pipe 16 and is guided to the upper part of the refrigerant storage space A. From the small holes 22 of the refrigerant storage space A
Is discharged into. The refrigerant discharged from the small holes 22 located in the dryer 19 passes directly through the dryer 19, but the refrigerant discharged from the small holes 22 formed above the refrigerant is discharged into the spacer 20, and the bottom 20 a Small hole 2
1 enters the dryer 19. The liquid refrigerant that has passed through the dryer 19 and the filter 18 and has been separated from the air bubbles is once stored in the lower part of the refrigerant storage space A, and is connected to the refrigerant outflow pipe 2.
3 to an expansion valve (not shown). At this time, the container 13 is formed to be elongated and the flow path length is long, and the refrigerant is guided to the flow path through the small hole 22 of the guiding tube 16, so that the gas-liquid separation of the refrigerant is improved. . 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 heat insulating material 25 fills a gap between the header pipe 3 and the receiver tank 2. 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. This example
, The receiver tank 2 is connected to one side of the capacitor 1
The header pipe extends vertically adjacent to the header pipe 3.
Through brackets 26 provided at the upper and lower portions of
Therefore, a predetermined gap is formed between the header pipe 3 and the header pipe 3.
As shown in the figure.
Position that does not block the flow of air passing between
Where there is no obstruction between the tubes through which air passes (in this example,
On the opposite side of the tube from the header pipe 3)
It is arranged. The assembly 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 gap can also suppress the heat transfer from the header pipe to the receiver tank, preventing the refrigerant from reheating and
It can maintain the state and improve the gas-liquid separation property. Also, the gap prevents the refrigerant from reheating and
By setting the dimensions necessary for maintaining the state, the left and right dimensions (lateral dimensions) of the entire capacitor can be reduced. In addition,
Shiva tank blocks air flow to fins and tubes
No heat exchange efficiency is caused.

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

Continuation of front page (56) References JP-A-54-62545 (JP, A) JP-A-2-63215 (JP, U) JP-A-55-25562 (JP, U) JP-A-2-103667 (JP) , U) (58) Field surveyed (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. A communication portion that connects the refrigerant storage space and the refrigerant delivery portion, and is disposed at a position below the receiver tank, the communication portion connecting the refrigerant storage space and the refrigerant delivery portion; Open to the bottom, and the refrigerant outflow means for flowing out the refrigerant from the lower portion of the accumulation zone is provided, wherein the one of the header pipe and the receiver tank are partially connected by furnace brazing the connecting portion, and Between the two, a gap having a substantially uniform interval is formed along the axial direction of the receiver tank, and the gap is a predetermined gap required to prevent reheating of the refrigerant and keep the refrigerant in a liquid state. A capacitor integrated with a receiver tank characterized by its dimensions.