KR100622444B1 - Condenser integrated with receiver dryer - Google Patents

Abstract

The present invention relates to a receiver integrated condenser, comprising a first and a second header pipe, a plurality of tubes, a plurality of heat dissipation fins, and a receiver integrally coupled to the second header pipe. The upper and lower sides of the refrigerant inlet is formed, respectively, the receiver has two communication holes communicated to the header pipe and the lower body integrally brazed to the second header pipe, and coupled to the upper side of the lower body brazing In the receiver integrated condenser divided into an upper body, the two communication holes (38a) in the interior of the second header pipe 22 to divide the tube of the condenser into the condensation area (Pa) and the subcooling area (Pb) The second baffle 37 is coupled between the second baffle 37 and the first baffle 36 is coupled to the same level as the second baffle inside the first header pipe 20. Condensation zone The bypass hole 37a is formed to bypass the stagnant oil in the lower portion of the Pa to the subcooling area Pb, so that oil circulation inside the condenser is smoothed, thereby increasing the durability of the compressor and reducing cooling performance. It is effective to prevent.

Description

Condenser integrated with receiver dryer

1 is a cross-sectional view showing the structure of a conventional receiver integrated condenser,

Figure 2 is a schematic diagram for showing the refrigerant flow of Figure 1;

3 is a cross-sectional view showing a receiver integrated condenser according to a first embodiment of the present invention;

4 is a detailed view of a position where a second baffle is installed in FIG. 3;

Figure 5 is a plan sectional view of the second baffle position of the lower body in Figure 4,

6 is a schematic diagram showing the refrigerant flow of FIG.

7 is a detailed view of a position where a second baffle of a receiver integrated condenser according to a second embodiment of the present invention is installed;

8 is a cross sectional plan view of the second baffle position of the lower body of FIG. 7;

9 is a temperature distribution photograph of a conventional receiver integrated condenser,

10 is a temperature distribution photograph of the receiver integrated condenser according to the first embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

20: first header pipe 22, 122: second header pipe

24 tube 26 heat sink fin

28: receiver 36: the first baffle

37, 137: 2nd baffle 38: lower body

The present invention relates to a receiver integrated condenser.

In general, the condenser liquefies by exchanging the high temperature and high pressure refrigerant from the compressor with the outside air, and the receiver is installed between the condenser and the expansion valve to temporarily supply the liquefied refrigerant from the condenser to the evaporator according to the cooling load. In addition to the function of storing and separating the gaseous refrigerant contained in the refrigerant from the condenser, in recent years, the condenser integrated condenser integrated with the condenser and the receiver to reduce the space utilization side and the amount of refrigerant has been widely used.

As a conventional receiver integrated condenser, Korean Patent Laid-Open Publication No. 2005-0004421 discloses a first header pipe 1 and a second header pipe 2 spaced apart from each other in parallel with each other, as shown in FIG. Both tubes 4 are inserted at both ends of the header pipe 1 and the second header pipe 2 and are arranged in parallel with each other, and a plurality of heat dissipation fins 6 interposed between the tubes 4. And a receiver 8 integrally coupled to the second header pipe 2.

A coolant inlet 10 and a coolant outlet 11 are respectively formed on the upper and lower portions of the first header pipe 1, and the lower part of the second header pipe 2 communicates with the receiver 8. Communication holes are formed. The two communication holes are aligned with the communication holes of the receiver described later to form an outlet for the refrigerant to flow out from the condenser region of the condenser to the receiver and an inlet for the refrigerant to flow into the supercooling zone from the receiver.

Upper and lower ends of the first header pipe 1 and the second header pipe 2 are sealed by a cap member 12, and three inside of the first and second header pipes 1 and 2 are provided. Two baffles 13 are fixed to each other so as to form a compartment, thereby forming a communicating channel 4 and a refrigerant passage consisting of four passes. The upper three passes are condensation zones and the lower one pass is supercooled zones (see Figure 2).

The receiver 8 has a lower body 14 integrally brazed to the lower portion of the second header pipe 2, and is fitted to the upper side of the lower body 8 and fixed by brazing, while the fixing bracket 16 is fixed thereto. The upper body 15 is fixed to the upper portion of the second header pipe (2) by. A filter 17 is installed inside the lower body 14, and a cap 18 is screwed to the lower end of the lower body 14. And a desiccant assembly 19 is installed inside the upper body 15. The lower body 14 is provided with a communication hole 14a communicating with the condensation region of the condenser and a communication hole 14b communicating with the subcooling region.

As shown in FIG. 2, the conventional receiver integrated condenser configured as described above, the refrigerant flowing into the upper compartment of the first header pipe 1 through the refrigerant inlet 10 sequentially flows through P1, P2, and P3 flow paths. After the refrigerant of the heat exchanger with the outside air undergoing a condensation process, it enters the receiver through the lower body 14 of the receiver 8 is temporarily stored in the moisture by the desiccant assembly 19 installed in the upper body 15 On the other hand, dust and the like are removed by the filter 17 installed in the lower body 14, and then flows out through the refrigerant outlet 11 through the P4 flow path to the expansion valve (not shown).

The P1, P2 and P3 flow passages form a condensation region, and the refrigerant flowing through the P4 flow passage is almost liquid, thus forming a supercooling region. Of course, the refrigerant flows through the P2 and P3 flow paths, so the liquid phase is included to some degree of supercooling. The refrigerant passing through the P3 flow path is changed into a nearly liquid refrigerant through the condensation process in the condensation region. Therefore, the liquid phase 40 flows into the receiver 40 and is temporarily stored.

The condensation region has a refrigerant passage so as to occupy 70 to 80% of the total effective cross-sectional area of the condenser, and the refrigerant passage is formed to occupy 20 to 30% of the effective cross-sectional area of the condenser.

By the way, the conventional receiver integrated condenser has been manufactured so that the condensation area is two to three passes, but in recent years, in order to improve the pressure drop while pursuing higher efficiency, the condensation area is manufactured to be formed in one pass. In other words, by improving the efficiency and processing technology of the receiver integrated condenser, the refrigerant-side fluid diameter of the tube is made smaller and the fin height is lowered, thereby pursuing high efficiency by densifying the fin and the tube. In order to improve the pressure drop, the condensation zone is formed to be formed in one pass, and the condensation zone has a refrigerant flow path formed to occupy 75 to 90% of the effective cross-sectional area of the condenser.

Therefore, the number of tubes of hot water in the condensation area of one pass increases, so that a pressure deviation (low pressure is formed in the lower part of the condensation area) occurs in the path. The pressure deviation is represented by the velocity distribution on the tube surface. In addition, the oil in the refrigerant is contained in the gas phase in the refrigerant at the time of compression, and is condensed in the condenser, so that the specific gravity is higher than that of the refrigerant. Therefore, the oil is located at the lower portion of the condensation region. Due to this characteristic of the oil having low fluidity and pressure unevenness, the oil is stagnated at the lower part of the condensation region. Stagnant oil causes oil deficiency in the system and occupies a certain portion in the condenser, thus reducing the heat dissipation area, leading to lack of condensation performance. As a result, there is a problem that the durability of the compressor is lowered and the cooling performance is insufficient.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a receiver integrated condenser to smooth the oil circulation inside the condenser to increase the durability of the compressor and to prevent a decrease in cooling performance.

The receiver integrated condenser according to the present invention includes a plurality of tubes installed in parallel between the first and second header pipes spaced apart from each other, the first and second header pipes, and the plurality of tubes. A heat dissipation fin, and a receiver integrally coupled to the second header pipe, and a refrigerant inlet is formed at upper and lower portions of the first header pipe, respectively, and the receiver has two communication holes communicating with the second header pipe. A receiver integrated condenser having a lower body integrally brazed to a second header pipe and an upper body coupled to an upper portion of the lower body and brazed, wherein the tube of the condenser is divided into a condensation zone and a supercooling zone. The second baffle is coupled between the two communication holes in the second header pipe, and the second header is inside the first header pipe. The first baffle is coupled to the same level as the baffle, the second baffle is characterized in that the bypass hole is formed to bypass the stagnant oil in the lower portion of the condensation region to the subcooling region.

The size of the bypass hole formed in the second baffle is preferably 0.5 to 7 mm 2 in cross section.

A bypass cutout groove having a predetermined length is formed along a circumferential surface of the second header pipe at a position where the second baffle is installed in the second header pipe. It is also possible to have a structure that bypasses the oil stagnated in the lower portion of the condensation region to the subcooling region.

It is preferable that the cross-sectional area on the plane of the bypass cut groove is 2 to 12 mm 2.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

As shown in FIG. 3, the receiver integrated condenser according to the present invention (first embodiment) includes a first header pipe 20 and a second header pipe 22 spaced apart from each other in parallel with each other, and the first header. A plurality of tubes 24 having both ends inserted into slots of the pipe 20 and the second header pipe 22 and arranged in parallel with each other, and a plurality of heat dissipation fins 26 interposed between the tubes 24; And a receiver 28 integrally coupled to the second header pipe 22.

A coolant inlet 30 and a coolant outlet 32 are respectively formed on the upper and lower portions of the first header pipe 20, and the lower part of the second header pipe 22 communicates with the receiver 28. Communication holes are formed. These two communication holes are aligned with the communication holes of the receiver described later to form an outlet through which the refrigerant flows from the condenser region to the receiver and an inlet through which the refrigerant flows from the receiver to the subcooling region. Upper and lower ends of the first header pipe 20 and the second header pipe 22 are sealed by a cap member 34.

The receiver 28 has a lower body 38 integrally brazed to the lower portion of the second header pipe 22, and is fixed to the upper side of the lower body 38 and fixed by brazing, while a fixed bracket 42 is provided. It is divided into the upper body 40 which is fixed to the upper portion of the second header pipe 22 by.

A filter 44 is installed inside the lower body 38, and a cap 46 is screwed to the lower end of the lower body 38. And a desiccant assembly 48 is installed inside the upper body 40. The upper portion of the cap 46 is attached to the filter 44 to trap foreign matters, the lower end of the filter 44 is provided with an O-ring to prevent leakage and maintain airtightness. The lower body 38 is provided with a communication hole 38a communicating with the condensation region of the condenser, which will be described later, and a communication hole 38b communicating with the subcooling region.

A second baffle 37 is coupled between the two communication holes 38a and 38b inside the second header pipe 22 to divide the plurality of tubes 24 of the condenser into a condensation zone and a subcooling zone. The first baffle 36 is coupled to the inside of the first header pipe 20 at the same level as the second baffle 37. As shown in FIG. 4, a bypass hole 37a is formed in the second baffle 37 to bypass oil stagnated in the lower portion of the condensation region to the subcooling region.

If the bypass hole 37a is too small, the oil cannot be bypassed to the subcooling region, and if the bypass hole 37a is too large, the amount of refrigerant bypassing the supercooling region without passing through the receiver will increase so that subcooling is not performed. As a result of repeated tests, it was found that the cross-sectional area of the bypass hole 37a hole was suitable for 0.5 to 7 mm 2.

Fig. 5 shows a cross-sectional view of a portion where the second baffle 37 is installed in the lower body of the receiver. As shown, the lower body 38 of the receiver is provided with a flange portion 38c which wraps around the outer circumferential surface of the second head pipe 22 so as to be easily assembled to the second header pipe 22 when brazing. It is. The flange portion 38c is integrally formed with the cylindrical portion 38a by the connecting portion 38d. The communication holes 38a and 38b are formed in the connecting portion 38d.

Figure 6 is a schematic diagram for showing the refrigerant flow of the receiver integrated condenser according to the present invention. As shown, the refrigerant flowing into the first header pipe through the refrigerant inlet 30 is exchanged with the outside air while the refrigerant in the gaseous phase undergoes condensation while passing through the Pa channel, and then the lower body 38 of the receiver 28. Moisture is removed by the desiccant assembly 48 installed in the upper body 40 while being temporarily stored and flowed into the receiver, and dust and the like are removed by a filter installed in the lower body 38. After passing through the refrigerant outlet 32 flows to the expansion valve (not shown). The Pa flow path forms a condensation region, and the refrigerant flowing through the Pb flow passage is almost liquid, thus forming a supercooling region.

At this time, the oil stagnated at the lower part of the condensation region due to the characteristics of the oil having low fluidity and the pressure nonuniformity passes through the lower part of the second header pipe 22 without passing through the receiver through the bypass hole 37a shown in FIG. Since it flows through the subcooling region, it prevents the cooling performance of the cooling system from being lowered and the durability of the compressor.

9 is a photograph showing a temperature distribution of a refrigerant of a conventional receiver integrated condenser (condenser shown in FIG. 1), and FIG. 10 is a refrigerant of a receiver integrated condenser (shown in FIG. 3) according to a first embodiment of the present invention. The photograph shows the temperature distribution of. As shown, in the conventional receiver integrated condenser, due to the oil stagnated in the lower portion of the condensation region, the heat dissipation is not performed smoothly, but the high temperature is maintained even in the supercooling region. It can be seen that the cooling performance is improved by the smooth heat dissipation.

Meanwhile, as another embodiment (second embodiment) of the present invention, as shown in FIG. 7, the second header pipe 122 is disposed at the position where the second baffle 137 is installed in the second header pipe 122. A bypass cut groove 122a of a predetermined length is formed along the circumferential surface. It is also possible to have a structure that bypasses the oil stagnated in the lower portion of the condensation region to the subcooling region.

The bypass incision groove 122a passes through the second header pipe 122 so as to contact the lower body 38 of the receiver, or is processed into an incision groove so that the flesh of the second header pipe 122 remains. As shown in FIG. 8, it is configured to have a long hole along the circumferential surface of the second head pipe 122.

At this time, it is known that the cross-sectional area on the plane of the bypass cut groove 122a is preferably 2 to 12 mm 2 as a result of the repeated test. That is, if the bypass incision groove 122a is too small, the oil cannot be bypassed to the supercooling region, and if the bypass incision groove 122a is too large, the amount of refrigerant that bypasses the supercooling region without passing through the receiver increases. Since sub-cooling cannot be performed, the size setting of the bypass cut-out groove 122a is very important.

Since the rest of the configuration of the embodiment (second embodiment) of Figs. 7 and 8 is the same as that of the first embodiment, detailed description thereof will be omitted.

According to the receiver integrated condenser according to the present invention, the oil circulation inside the condenser is smooth, the durability of the compressor is high, the heat dissipation in the condenser is smooth, there is an effect that the cooling performance is improved.

Claims (4)

The first and second header pipes spaced apart from each other, a plurality of tubes installed in parallel between the first and second header pipes, a plurality of heat dissipation fins provided between the plurality of tubes, and the second header pipe And a receiver connected to the upper and lower portions of the first header pipe, respectively, and a refrigerant inlet is formed, and the receiver includes two communication holes communicating with the second header pipe and integrally with the second header pipe. In the receiver integrated condenser divided into a lower body to be brazed, and an upper body to be brazed coupled to the upper side of the lower body, A second baffle 37 is coupled between the two communication holes 38a and 38b inside the second header pipe 22 to divide the tube of the condenser into the condensation area Pa and the subcooling area Pb. The first baffle 36 is coupled to the inside of the first header pipe 20 at the same level as the second baffle, The second baffle (37) is a condenser integrated condenser, characterized in that the bypass hole (37a) is formed to bypass the oil stagnated in the lower portion of the condensation area (Pa) to the subcooling area (Pb). The method of claim 1, The size of the bypass hole (37a) formed in the second baffle (37a) has a cross-sectional area of 0.5 ~ 7mm2, the liquid receiver integrated condenser. The first and second header pipes spaced apart from each other, a plurality of tubes installed in parallel between the first and second header pipes, a plurality of heat dissipation fins provided between the plurality of tubes, and the second header pipe And a receiver connected to the upper and lower portions of the first header pipe, respectively, and a refrigerant inlet is formed, and the receiver includes two communication holes communicating with the second header pipe and integrally with the second header pipe. In the receiver integrated condenser divided into a lower body to be brazed, and an upper body to be brazed coupled to the upper side of the lower body, A second baffle 137 is coupled between the two communication holes 38a and 38b in the second header pipe 122 to divide the tube of the condenser into the condensation area Pa and the subcooling area Pb. The first baffle 36 is coupled to the inside of the first header pipe 20 at the same level as the second baffle, In the position where the second baffle 137 is installed in the second header pipe 122, the second header pipe 122 may bypass oil stagnated under the condensation area Pa to the supercooling area Pb. A receiver integrated condenser, characterized in that the bypass cut groove 122a of a predetermined length is formed along the circumferential surface thereof. The method of claim 3, A cross-sectional area on the plane of the bypass incision groove (122a) is a receiver integrated condenser, characterized in that 2 ~ 12 mm2.

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