JPH11211276A - Subcool system condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a subcool system condenser capable of taking out a condensed refrigerant in a supercooled condition, wherein the system is integrally formed compact as a whole, necessitates the least restriction on an installation space and an arrangement layout relative to other instruments, and can be advantageously installed in a narrow engine room of an automobile or the like. SOLUTION: A mutiflow type condenser 10 is constructed such that between a pair of headers 1a, 1b, a plurality of heat exchanging tubes 2 which have both ends thereof respectively communicably connected to the headers 1a, 1b are disposed in parallel so as to constitute a core portion 11, refrigerant which enters the core portion 11 by way of a refrigerant inlet 6a flow through the core portion 11 in a winding manner and reaches a refrigerant outlet 6b. In such a condenser 10, a hollow tubular body 3a which has one end thereof communicably connected with one header 1a is arranged in the midst of the core portion 11 and the arranged portion of the hollow tubular body 3a constitutes a tank portion T. The upstream side of the core portion 11 from the tank portion T constitutes a condensing portion C, while the downstream side of the core portion 11 from the tank portion T constitutes a subcool portion S which allows a refrigerant liquid to flow into the tank portion T and to advance to the refrigerant outlet 6b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subcool system condenser used as a condenser for a car air conditioner or the like.

[0002]

2. Description of the Related Art Generally, a cooling mechanism such as a car air conditioner cools and condenses a high-temperature and high-pressure gas refrigerant discharged in a compressed state from a compressor by heat exchange with outside air in a condenser, and then cools the liquid tank (with a receiver). From the liquid tank, and sends only the liquid refrigerant from the liquid tank to the evaporator as a low-pressure / low-temperature atomized state via an expansion valve, and evaporates and gasifies by heat exchange with air in the vehicle to send to the compressor. With this cycle, the heat inside the vehicle is discharged outside the vehicle.

[0003] However, the refrigerant condensed in the condenser has an insufficient degree of supercooling and is in an unstable state in which it is vaporized due to slight heat reception or pressure loss on the downstream side. Tends to occur. As a countermeasure for this,
A second condenser is interposed downstream of the liquid tank, and the condenser cools the liquid refrigerant to a temperature lower than the condensation temperature by 2%.
A method of supercooling to a temperature as low as about 5 ° C. and sending it to an evaporator in a stabilized state as a liquid refrigerant to lower the refrigerant discharge temperature at the evaporator to increase the cooling efficiency is being studied.

However, in such a configuration in which a second condenser for supercooling is separately provided, a space for installing the condenser is required, and the amount of refrigerant to be charged in the refrigerant cycle is increased. In order to cope with this problem, the liquid tank must be enlarged, especially when it is installed in a small engine room for car air conditioners, the space is greatly restricted, and the layout is extremely complicated in relation to other equipment. In addition, since a strong mounting structure is required to secure vibration resistance, there is a problem in that the assembly cost of the entire engine room is high and it is difficult to make the engine room compact.

Therefore, in recent years, the original condenser section and the supercooling condenser section, that is, the subcool section, have been integrated, and a liquid tank has been attached to the side of the integrated condenser body in a protruding state. There have been proposed many subcooled system condensers in which a liquid tank communicates with a refrigerant outlet of the former condenser part and a refrigerant inlet of the latter condenser part by respective pipes (Japanese Patent Laid-Open Nos. 4-92714 and 4-92714). 22743
6, No. 9-170853, No. 9-170854,
JP-A-6-36912, etc.). That is, according to these subcool system capacitors, compared with a configuration in which a subcooling capacitor is separately provided, there is an advantage that the amount of refrigerant to be charged can be reduced, the installation space is reduced, and the mounting structure is simplified.

[0006]

However, in the subcool system capacitor proposed above, since the liquid tank is mounted on the side of the capacitor body in a protruding state, it is still limited in installation space.
There is still much room for improvement, such as difficulty in adoption due to the layout of the arrangement with other devices, and the necessity of changing the arrangement and design of other devices due to the adoption. In particular, in the case of a condenser for car air conditioners, since it is installed in a narrow space between the radiator and the radiator grille at the front of the vehicle body, it is necessary to design the core of the condenser body narrower by the amount of the liquid tank projection. In addition to this, the performance of the condenser and, consequently, the performance of the car air conditioner will be reduced, and the downsizing of the engine room will be hindered.It cannot be adopted depending on the model of the vehicle. However, there is a problem that it takes much time and costs for assembling.

In view of the above circumstances, the present invention provides a subcooling system condenser having a function of sending condensed refrigerant to the evaporator side in a sufficiently supercooled state, and the entirety including a portion corresponding to a conventional liquid tank is made compact. It is integrated and has no parts that protrude laterally or forward and backward from the capacitor body, and there are few restrictions on installation space and layout with other equipment, and it can be installed advantageously in a narrow engine room of a car. It is intended to be.

[0008]

In order to achieve the above object, a subcool system capacitor according to a first aspect of the present invention has two ends connected to both headers between a pair of headers spaced apart from each other. In a multi-flow condenser in which a plurality of heat exchange pipes are arranged in parallel to form a core portion, and refrigerant flowing from a refrigerant inlet flows in a meandering manner through the core portion by partitions in both headers and reaches a refrigerant outlet. In the middle of the core portion, a hollow pipe having only one end connected to one header is disposed between the heat exchange pipes, and the condensed liquid of the hollow pipe is disposed. It constitutes a tank section for storing the refrigerant and the gaseous refrigerant, and the upstream side of the tank section constitutes a condensing section, and the downstream side constitutes a subcool section which introduces only the refrigerant liquid from the tank section and guides it to a refrigerant outlet.

In the above subcool system condenser, the gas refrigerant flowing from the refrigerant inlet is cooled and condensed by heat exchange with the outside air while passing through the condensing portion in a meandering manner.
The liquid refrigerant flows into the tank portion in a gas-liquid mixed state, and only the liquid refrigerant flows into the subcool portion from the tank portion, is supercooled by heat exchange with the outside air, and is sent to the evaporator as a stable liquid refrigerant from the refrigerant outlet. . In the tank section, the surplus refrigerant in the circulation cycle can be stored by changing the gas-liquid ratio according to the load fluctuation, and a separate liquid tank is connected to the capacitor body like a conventional subcool system condenser. Since there is no outgoing / incoming pipe line, the ability to respond to load fluctuations can be increased without increasing the amount of charged refrigerant.

Moreover, in this subcool system capacitor, the entire structure including the condensing portion, the subcool portion, and the tank portion has a single flat panel shape, and greatly protrudes from a capacitor body such as a liquid tank in a conventional subcool system capacitor. Because there is no such part, the installation space and the layout restrictions with other equipment are extremely small, and the hollow pipe of the tank can be directly supported by the header as well as the heat exchange pipe. A special mounting structure such as a liquid tank for securing vibration isolation is not required.

The hollow tube of the tank in such a subcooled system condenser may be constituted by a single pipe having one end connected to the header as in the second aspect of the present invention. And the hollow tube can be firmly supported by being fixed to the header at the end on the communication side. Further, the hollow tubular body has the same shape as the heat exchange pipeline, and has a configuration in which one end side is connected to the header and the other end is closed and the other end is closed. This eliminates the need for special parts for forming the tank part, and uses the same part as the heat exchange pipe with one end closed by a press or the like, and uses the heat in both headers. It can be mounted between both headers by using the mounting structure for the exchange pipeline.

[0012] Further, the tank portion in the arrangement form in which both headers extend in the vertical direction is constituted by a space portion which is partitioned into upper and lower portions in one header, and the hollow tube body connected to the upper portion of this space portion. Then, as in the invention of claim 4,
In the header having the tank portion, it is necessary to attach a bypass pipe for guiding the liquid refrigerant in the space portion through the outside of the header to the header internal space on the subcool portion side, but this bypass pipe may be thin, and the header may be thin. The protrusion amount can be set small and short along the shape.

On the other hand, in the arrangement in which a pair of headers along the left-right direction are vertically separated from each other, the hollow tube of the tank portion is in the shape of a vertical container. If the upper part of the gas phase and the condensing part of the upper header are connected and connected, and if a structure is provided that has a liquid passage pipe that protrudes from the subcool part of the upper header to the lower part of the liquid phase of the hollow tubular body, the tank part The whole can be mass-produced as an independent article separately manufactured, and can be easily set detachably with respect to the capacitor body.

According to a sixth aspect of the present invention, for the same purpose as described above, a plurality of heat exchange pipes each having both ends connected to both headers are connected in parallel between a pair of headers spaced apart from each other. The first and second condensers are arranged and constitute a core part, and these two condensers are arranged adjacently so as to be arranged side by side with a tank part for storing a liquid refrigerant and a gas refrigerant therebetween. The first condenser serves as a condensing section and has a refrigerant outlet connected to the tank section, and the second condenser has a subcool section having a refrigerant inlet connected to the tank section.

In the subcooled system condenser according to the present invention, the gas refrigerant flowing from the refrigerant inlet of the first condenser constituting the condensing part is cooled and cooled by heat exchange with the outside air while passing through the core part in a meandering manner. Condensed, flows into the tank from the refrigerant outlet of the first condenser in a gas-liquid mixed state, and only the liquid refrigerant flows from the tank into the second condenser that forms the subcooling part, and is supercooled by heat exchange with the outside air. The refrigerant is sent to the evaporator as a stable liquid refrigerant from the refrigerant outlet of the first condenser.

In this case as well, as described above, the surplus of the refrigerant in the circulation cycle can be stored in the tank portion in a form in which the gas-liquid ratio is changed in accordance with the load fluctuation. The ability to respond can be enhanced. In addition, although two capacitors are used, the two capacitors are arranged adjacent to each other so as to be arranged in a plane with a tank portion interposed therebetween, and are integrated. Because it has a flat panel shape and there are no parts that protrude greatly from the capacitor body, there are very few restrictions on the installation space and layout with other equipment, and there is a special case for ensuring the vibration isolation of the tank. No mounting structure is required.

Thus, in such a configuration using two capacitors, in the invention of claim 7, the header having the refrigerant outlet of the first condenser and the header having the refrigerant inlet of the second condenser are spaced apart from each other. The tank portion having the outer peripheral surfaces of both of these headers as a part of the inner peripheral surface is formed in a narrow space arranged in parallel. In such a subcooled system capacitor, the first and second capacitors are separately manufactured, and these are arranged in parallel so that the header having the refrigerant outlet of the first capacitor and the header having the refrigerant inlet of the second capacitor are adjacent to each other. With the parallel direction as the left and right, just fix the plate material of appropriate shape by brazing etc. so as to seal the front and rear direction between the adjacent headers and the top and bottom, and integrate the capacitors at the same time as the formation of the tank part Can be performed. In this case, the refrigerant outlet of the first condenser and the refrigerant inlet of the second condenser may be simple holes formed in the header.

In a configuration using two capacitors in the same manner, in the invention of claim 8, both the first and second capacitors are arranged such that a pair of headers vertically separated from each other in the left-right direction are serially connected to each other. In addition, the lower headers are connected to each other via a coupler, and the tank portion is formed of a vertical container-shaped hollow tube disposed between the core portions of the two capacitors. The provided refrigerant outlet communicates with the upper portion of the gas phase in the hollow tube, and extends from the refrigerant inlet provided in the upper header of the second condenser and extends through the lower part of the liquid phase in the vertical cylinder. I have it. In this case, as for the first and second capacitors, the upper headers are connected to each other via a flow path connection to the tank portion, and the lower headers are connected to each other by the coupler. It can be mass-produced as an independent article manufactured separately and can be detachable from the capacitor body.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a subcooled system capacitor according to the present invention will be specifically described with reference to the drawings.

FIG. 1 shows a subcooled system condenser (10) of the first embodiment, (a) is a front view, and (b) is a principle view. In this condenser (10), a large number of flat tubes (2) along a horizontal direction as heat exchange conduits are provided between a pair of left and right vertical headers (1a) (1b) facing each other. Both ends are both headers (1a) (1
The core part (11) is arranged in parallel at equal intervals in a state of being connected to and connected to (b). At the intermediate height position of the core portion (11), the opened one end is connected to the left header (1a).
A hollow pipe body (3a) in the form of a round pipe connected to and connected to the flat tubes (2) and (2) adjacent to each other is arranged in parallel with a space. The other end of the hollow tube (3a) is closed. A corrugated fin (4) is a strip provided on the upper and lower edges of the core (11), between adjacent tubes (2), between the hollow tube (3a) and the tubes (2) on both sides. Each space between the cover (5) and the tube (2) is disposed over substantially the entire length of the space (the center part is not shown in the figure).

The left header (1a) has a refrigerant inlet (6a) in the upper part, and the inside is formed by partition plates (7) and (7) provided in the lower part and the upper part of the communicating part of the hollow tube (3a). At the lower part of the side, a bypass pipe (8) is provided to communicate the upper and lower spaces (12a) (12b) separated by the lower partition plate (7) through the outside of the header. on the other hand,
The right header (1b) has a partition plate (7) whose inside is provided at the same height position as the partition plate (7) below the left header.
The refrigerant outlet (6b) is provided in the space (12c) on the lower side of the partition.

Thus, in the condenser (10) of the first embodiment, the refrigerant flowing from the refrigerant inlet (6a) is divided by the headers (1a) and (1b) so that the core portion (11) is formed.
Flows in a meandering manner through a plurality of tubes (2)... And reaches a refrigerant outlet (6b), but a space between upper and lower partition plates (7) and (7) of a left header (1a). (12a) and the hollow pipe (3a) communicating therewith constitute a tank (T), the upstream of which is a two-pass condenser (C), and the downstream of which is a one-pass subcooler. (S).

Each of the constituent members is, for example, a flat tube (2)... Having both headers (1a) and (1b) in which both ends of a pipe formed by bending an aluminum brazing sheet into a cylindrical shape are closed with lid plates. Extruded aluminum material, corrugated aluminum brazing sheet as corrugated fins (4), aluminum brazing sheet as cylindrical hollow tube body (3a) bent at one end with lid plate An aluminum extruded pipe or the like is used as the closed pipe or the bypass pipe (8). The tubes (2) are brazed together in a furnace with both ends inserted into circumferential slit-shaped holes provided in the peripheral walls of both headers (1a) (1b). The two headers (1a) and (1b) are connected and integrated so as to communicate with each other. These are the same in other embodiments described below.

FIG. 2 shows the principle of the subcool system condenser (20) of the second embodiment. This capacitor (20)
Is a multi-flow type similar to the capacitor (10) of the first embodiment, in which a number of flat tubes (2) are arranged at equal intervals between a pair of right and left headers (1a) (1b) along the vertical direction. Are arranged in parallel with each other to form a core portion (11). However, a plurality of (three in the figure) flat tubes slightly lower than the intermediate height of the core portion (11) are used as the hollow tubes (3b) of the tank portion (T) at one end side of the left header (1a). ), And the other end fitted to the right header (1b) is closed.

The left header (1a) is provided with a refrigerant inlet at the upper part, and has three upper, middle, and lower partitions (7).
..Partitioned by middle and lower partition plates (7) (7)
Space (12a) sandwiched between and the space below (12b)
Are communicated through the outside of the header by the same bypass pipe (8) as in the first embodiment. Further, the right header (1b) is internally formed by two partition plates (7) and (7) at the middle height position of the upper middle partition in the left header (1a) and the same height position as the lower partition in the left header (1a). And a refrigerant outlet (6b) is provided in the lowest space (12c).

In the capacitor (20) of the second embodiment,
A tank (T) is composed of the space (12b) of the left header (1a) and the hollow pipe (3b) communicating with the upper part thereof, and the upstream side of the tank (T) has four paths. The condensing section (C) and the downstream side constitute a sub-cool section (S) of one pass. Although not shown, the corrugated fins (4) arranged in each space between the tubes and the covers (5) (5) (5) ).

In the subcool system condensers (10) and (20) of the first and second embodiments, the high-temperature and high-pressure gas refrigerant pumped from the compressor (not shown) is:
In the process of flowing from the refrigerant inlet (6a) and passing through the condensing section (C) in a meandering manner, the core section (11) is cooled and condensed by heat exchange with outside air flowing in a direction perpendicular to the plane of the paper, and the gas-liquid mixture In this state, the refrigerant flows into the tank (T), in which uncondensed gas refrigerant accumulates in the hollow pipes (3a) and (3b) from above the space (12a), and the space (12a) Only the liquid refrigerant accumulated in the lower part of the tank flows into the subcool section (S) through the bypass pipe (8), and is supercooled by heat exchange with the outside air as described above, and is stabilized from the refrigerant outlet (6b). It flows out as a refrigerant and is guided to an evaporator (not shown).

FIG. 3 shows a subcooled system capacitor (30) of the third embodiment, (a) is a front view, and (b) is a principle diagram. This capacitor (30) is a multi-flow type similar to the capacitor (10) of the first embodiment, except that a pair of headers (1c) and (1d) along the horizontal direction face each other with a vertical separation. A flat tube (2)... Extending in the vertical direction between the headers (1c) and (1d) is arranged in parallel to form a core portion (11). At a position slightly to the right of the center of the core portion (11), a vertical round pipe-shaped hollow tubular body (3c) whose upper end is closed is connected to the open lower end side to the lower header (1d). Are arranged in parallel with the adjacent flat tubes (2) and (2) at an interval.

The upper header (1c) has a refrigerant inlet (6a) on the left end side, and the inside is divided into two parts by a partition plate (7): a position directly above the hollow tube (3c) and a position further to the left than this. It is divided by. Also, the lower header (1d)
A refrigerant outlet (6b) is provided on the right end side, and the inside is partitioned by a partition plate (7) between an intermediate position between two partitions in the upper header and a position near the right end, and a communicating portion of the hollow tube (3c). At the lower part of the hollow tube body (3c) from the inside of the header by a partition plate (70), and the space (12) on both sides of the intermediate partition plate (70).
d) (12e) and the hollow tube (3c) constitute a tank (T). The upstream side of the tank (T) is a condensing section (C) having three passes, and the downstream side is a subcooling section (S) having two passes.

In the subcool system condenser (30) of the third embodiment, the gas refrigerant flowing from the refrigerant inlet (6a) is cooled and condensed by heat exchange with the outside air in the condensing section (C). The mixed refrigerant flows into the space (12d) of the tank (T) and the uncondensed gas refrigerant flows into the hollow tube (3).
a) While the liquid refrigerant accumulates in (3b), only the liquid refrigerant flows into the subcool portion (S) from the space portion (12e) across the partition plate (70), and is supercooled by heat exchange with the outside air in the same manner as described above. The refrigerant flows out from the outlet (6b) as a stable low-temperature liquid refrigerant.

FIG. 4 shows a subcooled system capacitor (40) of the fourth embodiment. In this capacitor (40), similarly to the capacitor (30) of the first embodiment, a pair of headers (1c) and (1d) along the horizontal direction are vertically separated from each other and face each other. ), A number of flat tubes (2)... Extending in the vertical direction are arranged in parallel. The core part (11) has a wide right core part (11a) constituting the condensing part (C) and a subcool part ( S) and is divided into a narrow left core portion (11a). Then, between the core portions (11a) and (11b) on both sides, a hollow cylindrical body (3d) is supported in a suspended state on the upper header (1c) via mounting members (9) and (9). ) Are arranged, and the short and long 2 that hang down from the upper header (1c) into the hollow tube (3d).
The hollow tube (3) is passed through the liquid passage tubes (13a) and (13b).
d) communicates with the upper header (1c).

The upper header (1c) has a refrigerant inlet (6a) on the right end side, and the interior thereof is formed by three partition plates (7). It is divided at the middle position of 13b) and two places on the right side of this. The lower header (1d) has a refrigerant outlet (6
b), and the interior is partitioned at two positions: a position directly above the hollow tube (3d) and a position on the right side. Thus, the hollow tube (3d) forms a tank portion (T), and the upstream side thereof forms a condensing portion (C) having four passes, and the downstream side forms a subcool portion (S) having one pass.

In the subcool system condenser (40) of the fourth embodiment, the gas refrigerant flowing from the refrigerant inlet (6a) is cooled and condensed by heat exchange with the outside air in the condensing section (C), and the gas-liquid In the mixed state, the liquid flows into the hollow pipe (3d) of the tank (T) from the liquid pipe (13b), and the lower end of the liquid pipe (13a) is a liquid phase in the hollow pipe (3d). Since it is open at the lower part, only the liquid refrigerant flows into the subcool section (S) through the liquid passage pipe (13a), is supercooled by heat exchange with the outside air as described above, and is stable at a low temperature from the refrigerant outlet (6b). Out as a liquid refrigerant.

In the condensers (10) to (40) of the above-described first to fourth embodiments, the excess amount of the refrigerant in the refrigerant cycle in the tank (T) is determined by changing the gas-liquid ratio in accordance with the load variation. Since the tank can be stored in a variable form and the tank (T) is integrated into the middle of the core (11), a high response capacity to load fluctuations can be achieved without increasing the amount of refrigerant charged in the refrigerant cycle. Demonstrate. Moreover, the entire structure including the condensing part (C), the subcool part (S), and the tank part (T) forms a single flat panel, and the installation space and layout restrictions with other equipment are extremely small. Since the mounting structure for securing the vibration is simplified, it can be easily incorporated into a narrow area such as an engine room of an automobile where various other devices coexist without any trouble.

The hollow tube of the tank portion (T) may be formed in a round pipe shape like the capacitors (10) and (30) of the first and third embodiments or a hollow pipe like the capacitor (40) of the fourth embodiment. In the configuration of a cylindrical container, the capacity of the tank portion (T) becomes large, so that the ability to cope with a load change becomes particularly high. on the other hand,
In the condenser (20) of the second embodiment, the capacity of each hollow tube (3b) is small, but if the number is increased, the vertical width of the space (12a) of the header (1a) also increases.
It is possible to secure a sufficient capacity, and in addition, the same tube (2) of the heat exchange conduit as the hollow tube (3b) can be used in the same mounting state, so that the cost of parts and assembly is reduced. There is an advantage that it can be reduced. Further, the capacitor (40) of the fourth embodiment has the advantages that the entire tank portion (T) can be mass-produced as an independent article separately manufactured, and that the tank portion (T) can be set to be detachable and replaceable. Thus, the capacitors of the first and second embodiments (10)
In (20), the bypass pipe (8) protrudes to the side of the header (1a), but the bypass pipe (8) may be thin and the outward projection is set small and short as shown in the figure. The direction of the protrusion can be freely changed to the front-rear direction or the like indicated by the imaginary line in FIG. 1A, so that there is not much trouble in installing the capacitor.

In the subcooling system condensers of the above-described first to fourth embodiments, the condenser unit having a pair of headers has a condenser section (C), a subcooling section (S), and a tank section (T). By integrating the first condenser for the condensing section (C) and the second condenser for the subcooling section (S) in the form of a two-dimensional arrangement via the tank section (T), the same function is achieved. A subcool system capacitor can be configured. The following is a specific example.

FIG. 5 shows a subcool system capacitor (50) of the fifth embodiment, wherein (A) is a front view and (B) is a plan view. This capacitor (50) is composed of a multi-flow type first capacitor (50A) and a second capacitor (50B), both sides of which are arranged vertically adjacent to each other with their headers arranged in the vertical direction. (50
The tank (T) is configured between B).

The first condenser (50A) includes a condenser (C)
A refrigerant inlet (6a) is provided above the left header (1e), and the right header (1e) is provided.
A single-hole refrigerant outlet (6c) is drilled in the lower part of f), and flows in from the refrigerant inlet (6a) by one partition plate (7) in both headers (1e) and (1f). The cooled refrigerant flows downward through the core portion (11) in a three-pass meandering shape and reaches the refrigerant outlet (6c). The second capacitor (50B) constitutes the subcooled portion (S), the width of the core portion (11) is narrower than that of the first capacitor (50A), and a single hole is formed below the left header (1g). And a refrigerant outlet (6b) above the right header (1h).
g) The refrigerant flowing from the refrigerant inlet (6d) flows upward through the core portion (11) in a three-pass meandering shape by the partition plate (7) at each one position in (1h), and the refrigerant exit (6b) Has been reached.

The tank portion (T) is provided between the right header (1f) of the first condenser (50A) and the left header (1g) of the second condenser (50B). By fixing the plate material by brazing or the like so as to block the front and rear direction and the upper and lower sides, the lower part communicates with the refrigerant outlet (6c) of the first condenser (50A) and the refrigerant inlet (6d) of the second condenser (50B). In addition, a vertically long hollow portion sealed from the outside is formed.

In the subcooled system condenser (50) of the fifth embodiment, the gas refrigerant flowing from the refrigerant inlet (6a) exchanges heat with the outside air in the first condenser (50A), that is, the condensing section (C). It cools and condenses, and flows into the tank (T) from the refrigerant outlet (6c) in a gas-liquid mixed state, but the uncondensed gas refrigerant collects in the upper part of the tank (T), and only the liquid refrigerant enters the refrigerant inlet ( From 6d), the refrigerant flows into the second condenser (50B), that is, the subcool portion (S), is supercooled by heat exchange with the outside air, and flows out from the refrigerant outlet (6b) as a stable low-temperature liquid refrigerant.

FIG. 6 shows a subcooled system condenser (60) according to the sixth embodiment, wherein (a) is a front view and (b) is a plan view. In the condenser (60), the condenser (C) in the condenser (40) of the fourth embodiment is constituted by a first condenser (60A) having a wide left and right width of the core (11), and the subcooled section (S ) Is equivalent to the one composed of a second capacitor (60B) with a narrow left and right width of the core part (11).
A tank portion (T) formed of a vertical cylindrical container-like hollow tube (3d) similar to that of the fourth embodiment is provided between both capacitors (60A) and (60B).

Thus, the first and second capacitors (60
A) and (60B) are the refrigerant outlet (6e) provided at the left end of the former upper header (1j) and the latter upper header (1j).
k) and the refrigerant inlet (6f) provided at the right end of the tank (T) is connected to the hollow pipe (3d) of the tank (T) via the mounting member (9), while the lower headers (1m ) (1
n) are connected together via a coupler (14) to be integrated with the tank (T). In the tank part (T), a short liquid passage pipe (13b) communicating with the refrigerant outlet (6e) of the first condenser (60A) and a long liquid communicating pipe (13f) communicating with the refrigerant inlet (6f) of the second condenser (60B). The liquid passage pipe (13b) protrudes.

In the subcool system condenser (60) of the sixth embodiment, the behavior of the refrigerant and the function of the tank (T) are exactly the same as those of the fourth embodiment, but the condenser (C)
And the subcool part (S) are composed of independent capacitor units, so that the entire assembly and production and tank part (T)
There is an advantage that attachment / detachment becomes easier.

In the subcool system condenser according to the present invention, the condensing section (C) and the subcool section (S)
The detailed configuration of the core portion (11) such as the number of passes, the number of passages in each pass, the position of the refrigerant inlet / outlet, and the vertical and horizontal dimensions of the core portion (11) can be variously modified in addition to the embodiment. Although not described in each embodiment, by loading an appropriate adsorbent such as molecular sieve into the hollow tube of the tank (T), it is possible to adsorb and remove impurity components such as moisture in the refrigerant. May be set.

[0045]

According to the first aspect of the present invention, as a subcooling system condenser having a function of sending condensed refrigerant to the evaporator side in a sufficiently supercooled state, a tank corresponding to a condensing part, a subcooling part and a conventional liquid tank is provided. The unit is compactly integrated as a single panel with a flat part, and there are no parts that protrude laterally or back and forth from the capacitor body, so there are few restrictions on installation space and layout with other equipment, and vibration isolation That can easily be installed in a narrow engine room of an automobile, and can have a high ability to cope with load fluctuations without increasing the amount of charged refrigerant in a refrigerant cycle. .

According to the second aspect of the present invention, since the capacity of the tank can be set large in the above subcool system capacitor, there is an advantage that the ability to cope with a load change can be further improved.

According to the third aspect of the present invention, in the above subcool system condenser, the same part as the heat exchange conduit of the core part is used as the hollow tubular body of the tank part, and the same part as the heat exchange conduit is used. Since it can be mounted between the headers on both sides by the mounting structure, no special parts for forming the tank portion are required, and the cost of parts and the cost of assembly can be reduced.

According to the fourth aspect of the present invention, in the above-mentioned subcooled system capacitor in which the headers on both sides are arranged along the vertical direction, the tank portion is arranged in the partitioned space portion and the core portion in one header. When configured with an empty tube body, the amount of protrusion can be set small and short along the header so that the bypass pipe for guiding the liquid refrigerant in the space to the space inside the header on the subcool part side can be set.

According to the fifth aspect of the present invention, in the above-mentioned subcooled system capacitor in which a pair of headers extending in the left-right direction face up and down, the entire tank can be mass-produced as an independent article separately manufactured, and the tank can be attached and detached. It is easy to set them to be interchangeable.

According to the sixth aspect of the present invention, two condensers for the condensing part and the subcooling part are used as the subcooling system condenser having the function of sending the condensed refrigerant to the evaporator side in a sufficiently supercooled state. The entire structure consisting of both capacitors and the tank unit is integrated as a single flat panel, and there are few restrictions on installation space and layout with other equipment, and it is easy to secure vibration proofing. It is possible to provide a device that can be advantageously installed in a narrow engine room or the like, can exhibit a high ability to cope with load fluctuations without increasing the amount of charged refrigerant in the refrigerant cycle, and can be easily assembled and manufactured.

According to the seventh aspect of the present invention, in the subcooling system capacitor using the two condensers for the condensing part and the subcooling part, the formation of the tank part and the connection and integration of the two condensers are simultaneously and simultaneously performed. There is an advantage that it can be easily performed.

According to the invention of claim 8, in the subcooling system capacitor using the two condensers for the condensing part and the subcooling part, the two condensers are easily integrated with the header in series. In addition, the tank can be mass-produced as an independent article separately manufactured and can be set to be detachable and replaceable.

[Brief description of the drawings]

FIGS. 1A and 1B show a subcool system capacitor according to a first embodiment, wherein FIG. 1A is a front view and FIG.

FIG. 2 is a principle view showing a subcool system capacitor according to a second embodiment.

3A and 3B show a subcooled system capacitor according to a third embodiment. FIG. 3A is a front view, and FIG. 3B is a principle diagram.

FIG. 4 is a front view showing a subcool system capacitor according to a fourth embodiment.

5A and 5B show a subcooled system capacitor according to a fifth embodiment. FIG. 5A is a front view, and FIG. 5B is a plan view.

FIG. 6 shows a subcooled system capacitor according to a sixth embodiment, wherein FIG. 6A is a front view and FIG. 6B is a plan view.

[Explanation of symbols]

1a to 1j ... header 1m, 1n ... header 2 ... flat tubes (heat exchange pipelines) 3a to 3d ... hollow tubes 6a, 6c ... · · · Refrigerant inlet 6b, 6d · · · Refrigerant outlet 7 · · · · Partition plate 8 · · · · Bypass pipe 10, 20, 30, 40, 50, 60 ... Subcooled system condenser 50A, 60A ······ First condenser 50B, 60B ···························································· Condensing part T ... Tank part S ... Subcool part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeharu Ichiyanagi 6,224, Kaiyama-cho, Sakai City Showa Aluminum Co., Ltd.

Claims (8)

[Claims] 1. A plurality of heat exchange pipes, both ends of which are connected to both headers, are arranged in parallel between a pair of headers spaced apart from each other to form a core portion. In a multi-flow type capacitor that flows in a meandering manner through the core portion by a partition in both headers and reaches a refrigerant outlet, a hollow tube body having only one end connected to one header in the middle of the core portion has the heat. The hollow pipe is disposed between the exchange pipes, and the disposed portion of the hollow pipe constitutes a tank portion for storing the condensed liquid refrigerant and gas refrigerant. The condensing portion is located upstream of the tank portion, and the downstream portion is located downstream of the tank portion. A subcooling system condenser comprising a subcooling section for introducing only the refrigerant liquid from the tank section and guiding the refrigerant liquid to the refrigerant outlet. 2. The subcooled system condenser according to claim 1, wherein the hollow tube of the tank portion is formed of a single pipe having one end connected to the header. 3. The hollow tube of the tank portion is formed of a plurality of tubes having the same shape as the heat exchange pipeline, one end of which is connected to the header and the other end is closed. Subcool system condenser. 4. The tank section is composed of a space sectioned vertically in one of the headers along the vertical direction, and the hollow pipe body connected to an upper part of the space section. The subcool system condenser according to any one of claims 1 to 3, wherein the header has a bypass pipe for guiding the liquid refrigerant in the space through the outside of the header to the space inside the header on the subcool part side. 5. A pair of headers extending in the left-right direction are vertically spaced apart from each other, and the hollow tube of the tank portion has a vertical container shape, and the upper part of the gaseous phase of the hollow tube and condensation of the upper header are formed. 2. A subcooled system condenser according to claim 1, further comprising a liquid passage connected to the lower portion and communicating with the lower portion of the hollow tube from the subcooled portion of the upper header. 6. A pair of heat exchange pipes, both ends of which are connected to both headers, are arranged in parallel between a pair of headers that are spaced apart from each other, and a first and a second capacitor constituting a core portion are provided. These two condensers are arranged adjacently so as to be arranged side by side with a tank section for storing a liquid refrigerant and a gas refrigerant therebetween, and a first condenser serves as a condensing section and has a refrigerant outlet as the tank section. And a second condenser serving as a sub-cooling part, the refrigerant inlet of which is connected to the tank part. 7. An outer peripheral surface of a header having a refrigerant outlet of a first condenser and a header having a refrigerant inlet of a second condenser being partly arranged in parallel in a narrow space. 7. The subcool system capacitor according to claim 6, wherein said tank portion is formed. 8. The first and second capacitors are arranged such that a pair of headers along the left-right direction vertically separated from each other are arranged in series with each other, and the lower headers are connected to each other via a coupler. The tank portion is formed of a vertical container-like hollow tube disposed between the core portions of both capacitors, and a refrigerant outlet provided in an upper header of the first capacitor is connected to and communicates with a gas phase upper portion of the hollow tube. 7. The subcooled system condenser according to claim 6, further comprising a flow pipe extending from a refrigerant inlet provided in an upper header of the second condenser and protruding into a lower part of a liquid phase in the vertical cylindrical body.