CN1732364A - Receiver tank for refrigeration cycle, heat exchanger with the receiver tank, and condensation device for refrigeration cycle - Google Patents

Abstract

A receiver tank has a tubular tank body (30) with a refrigerant inlet hole (3a) and a refrigerant outlet hole (3b) that are formed in its lower wall (321). The upper end of the opening of the refrigerant inlet hole (3a) is positioned lower than the upper end of the opening of the refrigerant outlet hole (3b). At the upper end of the opening of the refrigerant inlet hole (3a) is provided a resistance layer (335) at which the speed of flow of a refrigerant is reduced by permeation of the refrigerant. The refrigerant flowing in from the refrigerant inlet hole (3a) permeates upward the resistance layer (335) to form a collection (R) of liquid in a space in the tank. A liquid refrigerant in the collection (R) is discharged through the refrigerant outlet hole (3b). Because of the structure above, the refrigerant can be saved, the structure can be simplified, and costs can be reduced.

Description

Storage tanks for refrigeration cycles, heat exchangers with storage tanks, and condensing units for refrigeration cycles

technical field

The present invention relates to storage tanks for refrigerating cycles, heat exchangers with storage tanks, and condensing devices for refrigerating cycles, which are suitable for use in automobiles, households, and commercial air-conditioning systems.

Background technique

In the refrigeration cycle of the expansion valve method, which is one of the representative methods of the refrigeration cycle, as shown in Fig. 13, the high-temperature and high-pressure gas refrigerant discharged from the compressor (CP) enters the condenser (CD), and is mixed with the outside air. After heat exchange, it is cooled, condensed and liquefied. It mainly flows into the storage tank (RT) in a liquid state. After complete gas-liquid separation, only the liquid refrigerant is exported. The state of the refrigerant is introduced into the evaporator (EP), and in the process of flowing in the evaporator (EP), it absorbs heat from the outside air and evaporates, and is exported from the evaporator (EP) in the form of gaseous refrigerant, and is sucked into the compressor machine (CP). In addition, the shaded part in the figure shows a refrigerant|coolant.

However, in recent years, in cooling cycles for automobiles, etc., a technology has been proposed for subcooling the refrigerant condensed in the condenser (CD) to a temperature several degrees lower and increasing the calorific value, Introduce expansion valve (EV) and evaporator (EP) to improve cooling capacity. As this proposed technology, a cryogenic treatment unit is installed, and the refrigerant condensed by the condenser (CD) is subcooled to a temperature several degrees lower than the condensation temperature, and it is sent to the evaporator in a stabilized state as a liquid refrigerant. one side way. Usually, this cryogenic treatment part is installed on the downstream side of the storage tank (RT), but in consideration of space utilization, a structure (cryogenic treatment system condenser) integrally assembled in the condenser (CD) is often adopted.

On the other hand, as disclosed in Figures 23A to 23D of International Publication No. WO02/14756, etc., as the above-mentioned storage tank (RT), a desiccant filling layer is provided inside to give It is a so-called dry storage device (レシャバドライイya) which absorbs and removes the moisture mixed in the refrigerant. In this dry storage device, there is a sandwich type with a space (133) (134) above and below a desiccant filling layer (132) arranged in a vertical tank (131) as shown in FIGS. 14A to 14B, and as shown in FIG. 14D shows two pocket types in which a desiccant filling layer (132) is provided on one side in the vertical tank (131).

Fig. 14A is a storage tank of the pumping-up method. The refrigerant flowing into the upper side space (133) from the top refrigerant inlet (135) penetrates the desiccant filling layer (132) and enters the lower side space (134). Here, the liquid refrigerant after gas-liquid separation is led out from the refrigerant outlet (137) at the top through the suction pipe. In addition, Fig. 14B is a storage tank in the form of a supply pipe. The refrigerant introduced from the refrigerant inlet (135) at the bottom flows into the upper side space (133) through the supply pipe (138), and enters through the desiccant filling layer (132). In the lower side space (134), the liquid refrigerant after gas-liquid separation is led out from the refrigerant outlet (137) at the bottom. Furthermore, Fig. 14C is a storage tank of the type facing the inlet and outlet, the refrigerant flowing into the upper side space (133) from the top refrigerant inlet (135) penetrates the desiccant filling layer (132) and enters the lower side space (134) , where the liquid refrigerant after gas-liquid separation is led out from the refrigerant outlet (137) at the bottom.

In the pocket-type storage tank of Fig. 14D, the refrigerant flowing in from the refrigerant inlet (135) on the side is in contact with the desiccant filling layer (132), and the liquid refrigerant that has undergone gas-liquid separation in the lower part is refrigerated from the bottom. Agent outlet (137) is led out.

In addition, in the storage tank disclosed in Figures 6 and 7 of Japanese Patent Application Laid-Open No. 11-211275, as shown in Figure 15, the refrigerant flowing in from the refrigerant inlet (135) at the bottom penetrates the desiccant filling layer (132) into the storage tank. The upper side space (133), where the liquid condensate after gas-liquid separation is led out from the refrigerant outlet (137) at the bottom through the suction pipe (139).

Improvement of space efficiency and high performance have long been the subject of air conditioning systems. Especially for automotive air conditioners, it is desired not only to use the limited space of the car body as effectively as possible, but also to make the system more compact. Therefore, it is necessary not only to reduce the amount of refrigerant enclosed in the refrigeration cycle, but also to improve performance in response to load fluctuations. Stability (overload toughness/overload toughness) while suppressing the time-dependent performance degradation (decrease in wear toughness) that accompanies continuous operation, it is desired to secure the rated range, that is, the refrigerant corresponding to the amount of refrigerant charged The stability domain in the supercooled state is as wide as possible.

However, for a general refrigeration cycle, the flow rate of the refrigerant flowing from the condenser (CD) side to the storage tank (RT) is high, so in the sandwich type shown in Figs. A large turbulent region of the liquid refrigerant occurs in the side space (133), and as a result of this, the liquid refrigerant accumulates in the upper side space (133), so that the liquid refrigerant cannot be sufficiently supplied to the lower side space (134); or the tiny remaining liquid in the lower side space (134) is disturbed by the high-speed liquid flow through the desiccant filling layer (132), and the gas refrigerant bubbles are generated at the same time, due to large-scale liquid level changes, from The refrigerant outlet (137) exposed in the gas phase flows out of the gaseous refrigerant; or a phenomenon that a large number of air bubbles are involved in the derived liquid refrigerant, the stability of the performance related to the load fluctuation is deteriorated, and the above-mentioned stable region becomes narrow. , Difficulties will be encountered in seeking to save refrigerant and reduce size and weight.

In addition, in the storage tank shown in Fig. 14A and Fig. 14B, the refrigerant pipe (36) (38) must be assembled inside the tank, so the number of parts will increase, the structure will be complicated, and the cost will increase. .

Furthermore, in the pocket-type storage tank shown in Figure 14D, the flow velocity of the internal refrigerant will be greater than that of the sandwich-type storage tank, and the turbulent flow will also be greater, so the refrigeration near the refrigerant outlet (137) The refrigerant liquid level will also be more unstable, and the gas refrigerant will flow out more easily, resulting in the same problem as above.

In addition, for the storage tank shown in FIG. 15 , the refrigerant pipe (39) must be assembled inside the tank, so that, like the storage tanks of FIGS. 14A and 14B described above, there are problems of complicating the structure and increasing the cost.

The object of the present invention is to provide a cooling cycle storage system that can solve the above-mentioned conventional problems, realize small and light weight, save refrigerant, simplify the structure, and reduce costs, and can supply stable refrigerant to the next cycle part. Tanks, heat exchangers with storage tanks and condensing units for refrigeration cycles.

Contents of the invention

In order to achieve the above objects, the first invention has the following configurations as its gist.

(1). The refrigeration cycle storage tank is a refrigeration cycle storage tank that stores condensed refrigerant and only extracts liquid refrigerant; it is characterized in that:

A cylindrical tank body with a refrigerant inflow hole and a refrigerant outflow hole connected to the tank inner space formed on the lower wall;

The opening position of the upper end of the aforementioned refrigerant inflow hole is arranged at a lower position than the position of the upper end opening of the aforementioned refrigerant outflow hole;

A resistance layer (damping layer) that reduces the flow velocity of the refrigerant through the penetration of the refrigerant is provided at the opening of the upper end of the aforementioned refrigerant inflow hole;

And it is configured such that the refrigerant flowing in from the refrigerant inflow hole penetrates upward through the resistance layer to form a storage liquid in the space inside the tank, and the liquid refrigerant in the storage liquid flows out through the refrigerant outflow hole.

In the storage tank for a refrigeration cycle according to the first invention, the condensed refrigerant in a gas-liquid mixed state flows into the tank main body from the refrigerant inlet hole, and immediately passes through the resistance layer to reduce its flow velocity. Therefore, when the liquid refrigerant with a flow rate lower than that of the gaseous refrigerant passes through the resistance layer and reaches the inner space of the tank, the flow rate has already dropped to a very low level, so there is no turbulent generation of retained liquid in the inner space of the tank. On the other hand, gaseous refrigerants, like liquid refrigerants, have their flow velocity lowered in the process of rising through the resistance layer, so when they reach the stored liquid generated in the tank inner space, they rise from the liquid in the form of gentle bubbles. , without disturbing the liquid surface, it breaks smoothly at the gas-liquid interface, discharges upward and is stored in the form of gaseous refrigerant.

Furthermore, since the upper end of the refrigerant outflow hole opens into the stable storage liquid in the tank interior space, only the liquid refrigerant in the storage liquid flows out through the outflow hole.

In this way, in the storage tank of the present invention, since only the stable liquid refrigerant can flow out, the amount of refrigerant enclosed in the refrigeration cycle can be set to an appropriate amount at an early stage, and the remaining amount in the storage tank can be reduced. The space serves as a buffer space to expand the stable region from the optimum refrigerant point to the excess point, so that the entire refrigeration cycle can be operated in a stable state.

In addition, since there is no need to arrange piping parts such as refrigerant suction pipes in the tank body, the number of parts is reduced and the structure is simplified.

In this first invention, the configurations of the following items 2 to 11 can be suitably adopted.

(2). The storage tank for the refrigeration cycle as described in item 1 above, wherein the periphery of the upper end opening of the refrigerant inflow hole on the upper surface side of the lower wall of the tank body is recessed to form a recess, and the aforementioned resistance layer.

In this structure, the refrigerant flowing in from the refrigerant inlet hole rapidly diffuses to a wide area in the concave part, so the flow velocity is further reduced, and the retentate can be generated in a more stable state, and the overall refrigeration cycle can be stabilized. run in the state.

(3) The storage tank for a refrigeration cycle according to item 1 above, wherein the upper surface of the resistance layer is arranged at a lower position than the upper end opening of the refrigerant outflow hole.

With such a structure, the retentate can be generated in a more stable state inside the tank body.

(4) The storage tank for a refrigeration cycle according to item 1 above, wherein the resistance layer has a plurality of dispersing flow paths for dispersing the refrigerant in the radial direction of the tank main body.

Here, as the aforementioned resistance layer, not only a single-layer or multi-layer filler filled with a large amount of particulate matter, a product composed of a woven or non-woven fabric formed by weaving or connecting a large number of thread-like objects, A product or the like made of a porous material or a porous plate, or a combination of two or more thereof can also be suitably used.

(5). The storage tank for a refrigeration cycle according to item 1 above, wherein the resistance layer is constituted by a filter layer formed of a fiber interlaced body.

In this structure, the resistance layer can also serve as a filter layer for removing impurities in the refrigerant.

(6). The storage tank for a refrigeration cycle as described in item 1 above, wherein an inflow-side filter is provided at the upper end opening of the refrigerant inflow hole on the lower surface side of the resistance layer.

In this structure, not only can the inflow side filter prevent impurities from flowing into the refrigerant inflow hole, prevent clogging of the inflow hole, etc., but also apply resistance to the refrigerant flowing into the tank body, so that the flow rate of the refrigerant can be further reduced. A retentate is generated in a more stable state.

(7). The refrigeration cycle storage tank described in any one of items 1 to 6 above, wherein an outflow-side filter is provided at the upper end opening of the refrigerant outflow hole.

In this structure, the filter on the outflow side can prevent impurities from flowing into the refrigerant inflow hole, and can prevent clogging of the inflow hole and the like.

Here, as the above-mentioned inflow-side and outflow-side filters, a filter made of a metal mesh sheet can be suitably used.

(8). The storage tank for a refrigeration cycle according to item 1 above, wherein a pressing member for holding the resistance layer in a downwardly pressed state is provided inside the tank main body.

In this structure, the resistance layer can be reliably assembled at a predetermined position in the tank body.

(9) The refrigeration cycle storage tank described in item 1 above, wherein the tank main body has an inlet and outlet member constituting a lower portion including its lower wall, and a main tank member constituting an upper portion from a middle portion.

In this structure, the structure of the preceding item 1 can be realized more surely.

(10). The storage tank for a refrigeration cycle according to item 1 above, wherein a desiccant filling layer is arranged in a fixed state on the upper side of the space inside the tank.

In this structure, moisture in the refrigerant can be removed in the storage tank, and the first invention can be used as a dry storage device.

(11). The storage tank for a refrigeration cycle according to item 1 above, wherein the desiccant filling member is provided in a free state in the space inside the tank.

In this structure, as in the structure of item 10 above, moisture in the refrigerant can be removed in the storage tank, and the first invention can be used as a dry storage device. Furthermore, since the fixing member for fixing the desiccant filling material can be omitted, the structure can be further simplified, and the assembling work and maintenance work of the tank can also be easily performed.

This 2nd invention is invention which specifies the heat exchanger with a storage tank using the storage tank of the said 1st invention, and has the following structure as a gist.

(12). The heat exchanger with storage tank is characterized in that:

Heat exchange between a pair of headers arranged in parallel at intervals, a plurality of heat exchange tubes connecting both ends to the two headers, and a condenser outlet for letting refrigerant condensed through the heat exchange tubes flow out. device body;

A cylindrical storage tank having a storage tank inflow hole and a storage tank outflow hole communicated with the space inside the tank formed on the lower wall; and

a refrigerant passage for introducing the refrigerant flowing out from the outlet of the condensing part into the inflow hole of the storage tank;

Wherein the opening position of the upper end of the inflow hole of the aforementioned storage tank is set at a lower position than the opening position of the upper end of the outflow hole of the aforementioned storage tank;

A resistance layer that reduces the flow velocity of the refrigerant through the penetration of the refrigerant is provided at the upper opening of the inflow hole of the storage tank;

And it is configured that the refrigerant flowing in from the inflow hole of the storage tank penetrates upward through the resistance layer to generate a retained liquid in the space inside the tank, and at the same time, the liquid refrigerant in the retained liquid flows out through the outlet hole of the storage tank.

The heat exchanger with a storage tank according to the second invention has the same effect as described above.

About this 2nd invention, the structure of the following items 13-16 can be suitably employ|adopted similarly to 1st invention.

(13). The heat exchanger with a storage tank as described in item 12 above, wherein a recess is formed around the upper end opening of the storage tank inflow hole on the upper side of the lower wall of the storage tank, and a recess is formed in the recess. The aforementioned resistance layer is set inside the entrance.

(14). The heat exchanger with a storage tank as described in item 12 above, wherein the upper surface of the resistance layer is located at a lower position than the upper end opening of the outflow hole of the storage tank.

(15). The heat exchanger with a storage tank according to item 12 above, wherein the resistance layer has a plurality of dispersion flow paths for dispersing the refrigerant in a radial direction of the storage tank.

(16). The heat exchanger with a storage tank according to item 12 above, wherein the resistance layer is constituted by a filter layer formed of a fiber interlaced body.

In addition, in this 2nd invention, the structure of said 6-11 can be employ|adopted suitably similarly.

The third invention is an invention specifying a heat exchanger with a storage tank such as a subcooling system condenser utilizing the storage tank of the above-mentioned first invention, and has the following configuration as its gist.

(17). The heat exchanger with storage tank is characterized in that:

The heat exchanger main body is provided with a pair of headers arranged in parallel at intervals, a plurality of heat exchange tubes connecting both ends of the headers, and separating the two headers to exchange heat between the plurality of headers. a partition member that divides the tube into a condenser unit and a subcooler unit, an outlet of the condenser unit through which the refrigerant condensed by the condenser unit flows out, and an inlet of the subcooler unit through which the refrigerant flows into the subcooler unit;

A cylindrical storage tank having a storage tank inflow hole and a storage tank outflow hole communicating with the tank interior space are formed on the lower wall, and

A refrigerant passage for introducing the refrigerant flowing out from the outlet of the condensing part into the inflow hole of the storage tank, and at the same time introducing the refrigerant flowing out of the outflow hole of the storage tank into the inlet of the supercooling part;

Wherein the opening position of the upper end of the inflow hole of the aforementioned storage tank is set at a lower position than the opening position of the upper end of the outflow hole of the aforementioned storage tank;

A resistance layer that reduces the flow velocity of the refrigerant through the penetration of the refrigerant is provided at the opening of the upper end of the inflow hole of the aforementioned storage tank;

The refrigerant flowing in from the inflow hole of the storage tank penetrates upward through the resistance layer to generate a retained liquid in the inner space of the tank, and at the same time, the liquid refrigerant in the retained liquid flows out through the outlet hole of the storage tank.

The heat exchanger with a storage tank according to the third invention has the same effect as described above.

About this 3rd invention, the structure of the following item 18-21 can be employ|adopted suitably similarly to 1st invention.

(18). The heat exchanger with a storage tank as described in item 17 above, wherein the upper end opening of the storage tank inflow hole on the upper surface side of the lower wall of the storage tank is recessed to form a recessed portion, and the recessed portion The aforementioned resistance layer is set inside.

(19). The heat exchanger with a storage tank as described in item 17 above, wherein the upper surface of the resistance layer is set at a lower position than the upper end opening of the outflow hole of the storage tank.

(20). The heat exchanger with a storage tank according to item 17 above, wherein the resistance layer has a plurality of dispersing flow paths for dispersing the refrigerant in the radial direction of the tank main body.

(21). The heat exchanger with a storage tank as described in item 17 above, wherein the resistance layer is composed of a filter layer formed of a fiber interlaced body.

In addition, similarly to this third invention, the configurations of the aforementioned items 6 to 11 can be suitably adopted.

This 4th invention is an invention which specifies the condensing apparatus for refrigeration cycles using the storage tank of the said 1st invention, and has the following structure as a gist.

(22). The condensing device for the refrigeration cycle is characterized in that it has:

a condenser having a condensing part for condensing refrigerant and being provided with an outlet of the condensing part for letting refrigerant condensed through the condensing part flow out;

A cylindrical storage tank having a storage tank inflow hole and a storage tank outflow hole communicated with the space inside the tank formed on the lower wall; and

a refrigerant passage for introducing the refrigerant flowing out from the outlet of the condensing part to the inflow hole of the storage tank;

Wherein the upper end opening position of the storage tank inflow hole is configured at a position lower than the upper end opening position of the storage tank outflow hole;

At the opening of the upper end of the inflow hole of the aforementioned storage tank, a resistance layer that reduces the flow velocity of the refrigerant through the penetration of the refrigerant is provided;

And it is configured that the refrigerant flowing in from the inflow hole of the storage tank penetrates upward through the resistance layer to generate a retained liquid in the space inside the tank, and at the same time, the liquid refrigerant in the retained liquid flows out through the outlet hole of the storage tank.

The condensing device for a refrigeration cycle according to the fourth invention has the same effect as described above.

About this 4th invention, the structure of the following items 23-26 can be employ|adopted suitably similarly to 1st invention.

(23). The condensing device for a refrigeration cycle as described in item 22 above, wherein the upper opening of the storage tank inflow hole on the upper side of the lower wall of the storage tank is recessed to form a recessed portion, and the aforementioned resistance layer.

(24) The refrigeration cycle condensing device described in item 22 above, wherein the upper surface of the resistance layer is positioned lower than the upper end opening of the outflow hole of the storage tank.

(25). The refrigerating cycle condensing device according to any one of 22 to 24 above, wherein the resistance layer has a plurality of dispersing channels for dispersing the refrigerant in the radial direction of the tank body.

(26). The condensing device for a refrigeration cycle according to item 22 above, wherein the resistance layer is formed of a filter layer formed of interwoven fibers.

In addition, in this fourth invention, the configurations of the preceding paragraphs 6 to 11 can also be appropriately adopted.

The fifth invention is an invention specifying a condensing device for a refrigeration cycle with a subcooler using the storage tank of the above-mentioned first invention, and is composed of the following elements.

(27). The condensing device for the refrigeration cycle is characterized in that it has:

a condenser having a condensing part for condensing refrigerant and being provided with an outlet of the condensing part for letting refrigerant condensed by the condensing part flow out;

A cylindrical storage tank with a storage tank inflow hole and a storage tank outflow hole communicating with the tank interior space formed on the lower wall;

a subcooler having a subcooling part for subcooling liquid refrigerant and being provided with a subcooling part inlet for allowing liquid refrigerant to flow into the subcooling part;

a first refrigerant passage for introducing the refrigerant flowing out from the outlet of the condensing unit to the inflow hole of the storage tank; and

a second refrigerant passage for supplying the refrigerant flowing out from the outflow hole of the storage tank to the inlet of the supercooling unit;

Wherein the opening position of the upper end of the inflow hole of the aforementioned storage tank is set at a lower position than the opening position of the upper end of the outflow hole of the aforementioned storage tank;

At the opening of the upper end of the inflow hole of the aforementioned storage tank, a resistance layer that reduces the flow velocity of the refrigerant through the penetration of the refrigerant is provided;

And it is configured that the refrigerant flowing in from the inflow hole of the storage tank penetrates upward through the resistance layer to generate a retained liquid in the space inside the tank, and at the same time, the liquid refrigerant in the retained liquid flows out through the outlet hole of the storage tank.

The condensing device for a refrigeration cycle according to the fifth aspect of the present invention has the same effect as described above.

About this 5th invention, similarly to 1st invention, the structure of the following items 28-31 can be employ|adopted suitably.

(28). The refrigerating cycle condensing device as described in item 27 above, wherein the upper end opening of the storage tank inflow hole on the upper surface side of the lower wall of the storage tank is recessed to form a concave part, and the concave part is provided in the concave part. the aforementioned resistance layer.

(29). The refrigerating cycle condensing device described in item 27 above, wherein the position of the upper surface of the resistance layer is set at a position lower than the position of the upper end opening of the outflow hole of the storage tank.

(30). The refrigerating cycle condensing device according to item 27 above, wherein the resistance layer has a plurality of dispersing channels for dispersing the refrigerant in the radial direction of the tank main body.

(31). The condensing device for a refrigeration cycle as described in item 27 above, wherein the resistance layer is constituted by a filter layer formed of a fiber interlaced body.

Moreover, also about this 5th invention, the structure of said 6-11 can be employ|adopted suitably similarly.

As described above, when the storage tank for the refrigeration cycle of the first invention is used, the condensed refrigerant in the gas-liquid mixed state generates a retentate without causing disturbance in the tank space, and at the same time, the gaseous refrigerant becomes moderate bubbles. And rising from the liquid, it will not disturb the liquid level and break peacefully. Therefore, only the stable liquid refrigerant can flow out, so the amount of refrigerant enclosed in the refrigeration cycle can be set to an appropriate amount at an early stage, and not only can the size, weight, and refrigerant be saved, but also the stable The refrigerant is supplied to the next cycle part. Furthermore, since there is no need to provide piping parts such as refrigerant suction pipes in the tank, the number of parts can be reduced, the structure can be simplified, and cost savings can be achieved.

If the heat exchanger with storage tank and the condensing device for refrigeration cycle of the second to fifth inventions are used, the storage tank of the first invention can be used, so the same effect as above can be produced.

Description of drawings

FIG. 1 is a front view showing both sides of a heat exchanger with a storage tank according to an embodiment of the present invention.

Fig. 2 is a front sectional view showing the storage tank of the embodiment.

Fig. 3 is a front sectional view showing an inlet and outlet member of the storage tank according to the embodiment.

Fig. 4 is a front sectional view showing an exploded entrance and exit member of the embodiment.

Fig. 5 is a horizontal sectional view showing the doorway member of the embodiment.

Fig. 6 is a bottom view showing the doorway member of the embodiment.

Fig. 7 is an enlarged front sectional view showing the periphery of a flange block of the heat exchanger according to the embodiment.

Fig. 8 is an exploded front sectional view showing the periphery of a flange block of the heat exchanger according to the embodiment.

Fig. 9 is a perspective view showing the flange block of the embodiment.

Fig. 10 is a plan view showing the flange block of the embodiment.

Fig. 11 is a front sectional view showing a flange block of the embodiment.

Fig. 12 is an enlarged plan view showing the periphery of the inlet of the inflow passage of the flange block according to the embodiment.

Fig. 13 is a refrigerant circuit diagram of a refrigeration cycle.

Fig. 14A is a cross-sectional view schematically showing a storage tank as a conventional first example. Fig. 14B is a cross-sectional view schematically showing a storage tank as a second conventional example. Fig. 14C is a cross-sectional view schematically showing a storage tank as a third conventional example. Fig. 14D is a cross-sectional view schematically showing a storage tank as a fourth conventional example.

Fig. 15 is a cross-sectional view schematically showing a storage tank as a fifth conventional example.

Detailed ways

FIG. 1 is a front view showing both sides of a heat exchanger with a storage tank according to an embodiment of the present invention. As shown in the figure, the heat exchanger is equipped with: a multi-channel type heat exchanger body (10), a storage tank (3), and a Block flange (4) for joining parts.

The heat exchanger body (10) is provided with a pair of header pipes (11) along the vertical direction opposite to each other with a certain interval. Between the pair of headers (11), a plurality of flat tubes (12) along the horizontal direction as heat exchange tubes are spaced vertically and vertically in a state where their respective ends are communicated with the two headers. arranged side by side at intervals. Furthermore, corrugated fins (13) are arranged between the flat tubes (12) and outside the outermost flat tube (12), and side plates are arranged outside the outermost corrugated fins (13). (14).

On the predetermined height position of one header (11) in the heat exchanger body (10), the flange-shaped separator (50) of the flange block (4) described in detail later is provided, and at the same time A partition plate (16) is provided on the header (11) at the same height as the partition sheet (50). And, by separating parts such as these separating sheet (50) and separating plate (16), two manifolds (11) are separated at the same position, with separating part (16) (50) being a boundary, upper side The flat tubes (12) on the bottom side constitute the condensation part (1), meanwhile, the flat tubes (12) on the lower side constitute the supercooling part (2) which is relatively independent from the condensation part (1).

In addition, inside the header (11) of the condensing part (1), a partition plate (17) for diverting the refrigerant is provided at an appropriate height position. In the heat exchanger body (10) of this embodiment, the condensation The part (1) is divided into 1st to 3rd three paths (P1)-(P3).

Furthermore, on the upper part of the header (11) on the other side of the heat exchanger body (10), a condensing part inlet (1a) is provided corresponding to the first passage (P1), and at the same time, at the lower part, a (2) Correspondingly, an outlet (2b) of the supercooling part is provided.

As shown in Figure 2, the storage tank (3) includes a tank body (30), has a main tank part (31) that constitutes from the upper end portion of the tank body (30) to the middle portion, and constitutes a lower end portion of the pipe body (30). The entrance and exit parts (32).

The main tank member (31) has a longitudinally long cylindrical shape with a closed upper end and an open lower end. The inlet and outlet part (32) has a cylindrical shape with an open upper end and a lower end closed by a lower wall (321).

As shown in Figures 2 to 6, the entrance and exit part (32) forms a depression downward in the area of one half of the upper side of the lower wall (321), and the half of the side is formed as a low-level depression (330). , while the remaining half is formed as a high portion (340).

On the lower wall (321) of the inlet/outlet member (32), corresponding to the recessed portion (330), a storage tank inflow hole (3a) penetrating in the vertical direction is formed. The upper end of the storage tank inflow hole (3a) opens to the bottom surface of the recessed part (330). Furthermore, in the region corresponding to the storage tank inflow hole (3a) of the lower wall (321), an inlet-side protrusion (332) is formed in a downwardly convex shape, and the lower end of the storage tank inflow hole (3a) is formed on the bottom of the protrusion. The lower end surface of the outlet (332) is open.

In addition, on the lower wall (321) of the inlet/outlet member (32), corresponding to the high portion (340), a storage tank outflow hole (3b) penetrating in the vertical direction is formed. The upper end of the outflow hole (3b) of the storage tank opens at the high position (340). Furthermore, in the region of the lower wall (321) corresponding to the outflow hole (3b) of the storage tank, an outlet-side concavity (342) is formed in an upwardly recessed manner, and the lower end of the outflow hole (3b) of the storage tank is formed in this recess. The bottom surface of the constriction (342) is open.

On the recess (330) on the lower wall (321) of the inlet/outlet member (32), in such a way that the storage tank inflow hole (3a) is closed, an inflow side filter ( 333). Furthermore, on the upper surface of the filter (333), a filter layer (335) made of nonwoven fabric is arranged as a resistance layer for reducing the flow velocity of the refrigerant so as to fill the recess (330).

In addition, on the high part (340) of the lower wall (321) of the inlet and outlet member (32), a hat-shaped outflow side formed by a metal mesh sheet is provided so as to close the outflow hole (3b) of the storage tank. filter screen (343).

Furthermore, a pressing member (350) is provided on the upper surface side of the lower wall of the entrance/exit member (32).

The press member (350) is formed of a metal extruded product in which a peripheral wall portion is provided vertically upward on the outer peripheral edge portion of a circular bottom plate. The pressing part (350) is formed in a size that can be accommodated in a suitable state inside the inlet and outlet part (320).

In addition, the first area (353) of one side half of the bottom plate of the pressing part (350) corresponds to the recessed part (330) and forms a downward convex shape, and a plurality of refrigerant passages are formed on this area (353). hole (353a). Furthermore, an opening hole (354a) is formed corresponding to the storage tank outflow hole (3b) in the second region (354) of the remaining half.

The pressing member (350) is fitted into the inlet/outlet member (32) through the opening at the upper end, and presses the filter layer (335) from above through the first region (353). And then, with the state that the outflow side filter screen (343) faces the opening hole (354a) of the second area (353), the peripheral portion of the outflow side filter screen (343) is formed by the opening hole peripheral portion of the second area (353). Press from above. And, because the protrusion (325) that is arranged on the inner peripheral surface of the inlet and outlet part (32) is engaged with the upper end of the peripheral wall part of the pressing part (350), the pressing part (350) is pressed against the side of the inlet and outlet part (32). The state of the lower wall (321) side is maintained.

Here, regarding this embodiment, the upper surface position of the filter layer (335) is set at a lower position than the upper end opening position of the storage tank outflow hole (3b).

As shown in Figure 2, a porous plate (311) is fixed on the top of the main tank part (31) by a fixing component (315), and at the same time, a certain amount of dry powder in the shape of spherical particles such as molecular sieves is filled above the porous plate (311). agent, forming an upper desiccant filling layer (312) as a desiccant filling part.

The upper end opening of the inlet/outlet member (32) is fixed to the lower end opening of the main tank member (31) to form the storage tank (3) of this embodiment.

On the other hand, as shown in Figures 7 to 11, the flange block (4) that combines the storage tank (3) to the heat exchanger body (10) is provided with a body (41) and is integrally provided in a laterally protruding shape. An embedded portion (42) on the side of the body (41).

On the top of the flange body (41), an inlet-side recessed portion capable of matching the inlet-side protrusion (332) of the above-mentioned storage tank (3) is formed, and at the same time, an outlet-side concave portion capable of matching the above-mentioned storage tank (3) is formed. Outlet-side projection (46) of constriction (342).

Inside the flange block (4), there are provided an inflow passage (4a) for connecting the condensation part (1) and the storage tank (3), and a passage for connecting the storage tank (3) and the supercooling part (2). Outflow channel (4b).

The inflow channel (4a) has one end (inflow-side end) opening on the upper end surface of the embedded part (42), and the other end (outflow-side end) opening on the bottom surface in the inlet recess (45).

In the inflow passage (4a), the inflow side half is formed as a downwardly descending refrigerant descending flow path (40a), while the outflow side half is formed as a vertically rising refrigerant ascending flow path.

Furthermore, the inflow passage (4a) is configured such that the inflow-side end is arranged at a higher position than the outflow-side end.

The outflow channel (4b) has one end (inflow side end) opening on the upper end surface of the outlet side protrusion (46), and the other end (outflow side end) opening on the side surface of the embedded part (42).

In addition, a flange-shaped spacer (50) facing outward is integrally formed on the outer periphery of the upper end of the embedded portion (42) of the flange block (4) so as to protrude outward. The outer peripheral shape of the flange-shaped separator (50) is formed to match the inner peripheral shape of one header (11).

As shown in Fig. 7 and Fig. 12, the embedded part (42) of the flange block (4) is embedded in the condensation part (1) and the superfluous part in the inside of one header (11) in the form of being embedded from the side. Between the cooling parts (2), the peripheral part (41a) (41a) of the flange body (41) on the side of the embedded part and the header (11) are engaged and fixed in a sealed state. Furthermore, as shown in Fig. 7 and Fig. 12, the outer peripheral edge of the flange-shaped partition (50) at the upper end of the embedded part is bonded and fixed to the inner peripheral surface of the header (11) in a continuous state in the circumferential direction. The flange-shaped partition (50) is configured as a partition member for partitioning between the condensation part (1) and the subcooling part (2) inside one header (11) as described above.

Furthermore, in this joined state, the inflow-side end of the inflow passage (4a) communicates with the opening of the condensing part (1) to be configured as the condensing part outlet (1b), and at the same time, the outflow-side end of the outflow passage (4b) , communicates with the opening of the supercooling part (2) and is configured as a supercooling part inlet (2a).

Here, for this embodiment, the height position of the outflow-side end of the inflow passage (4a) is set at a position corresponding to the upper end of the supercooling part (2), and further, the outflow of the inflow passage (4a) The side end is provided at a lower position than the inflow-side end of the inflow passage (4a), that is, the condenser outlet (1b).

As shown in Figures 7 and 8, the protrusion (332) and the recess (342) of the above-mentioned storage tank (3) are embedded in the recess (45) of the flange block (4) in a suitable sealed state. ) and the protrusion (46), the lower end of the storage tank (3) is assembled on the flange block (4).

Furthermore, as shown in FIG. 1 , the upper part of the storage tank (3) is fixed to one header (11) via a bracket (6).

In addition, in this embodiment, the refrigerant passage is constituted by the inflow passage (4a) and the outflow passage (4b) of the flange block (4).

For the heat exchanger with storage tank of this embodiment, header (11), flat tube (12), cooling fin (13), side plate (14), storage tank (3), and flange block (4) ) and other core components are composed of aluminum (including its alloys) or welded aluminum plates, etc., by appropriately adding solder between them, and welding them in a furnace in a temporarily assembled state, so that the whole is connected into one .

In addition, in this embodiment, the flange-shaped separator (50) of the flange block (4) is bonded and fixed to the inner peripheral surface of the header (11) during the collective welding.

The heat exchanger with a storage tank of the above structure is used as a condenser of a refrigeration system for an automobile air conditioner together with a pressure reducing device such as a compressor and an expansion valve, and an evaporator. And, in this refrigeration cycle, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor flows into the condenser (1) from the condenser inlet (1a), and meanders among the first to third passages (P1) to (P3). In this process, it exchanges heat with the outside world and is cooled and condensed.

The condensed refrigerant is introduced into the inflow passage (4a) of the flange block (4) from the outlet of the condensing part (1b), and is introduced into the storage tank from the inflow hole (3a) of the storage tank through the inflow passage (4a). in tank (3).

The refrigerant flowing into the inflow hole (3a) of the storage tank, after flowing into the tank from the upper end of the inflow hole (3a), immediately spreads rapidly to a wide area in the recessed part (330) to reduce the flow velocity, and passes through the inflow side. The filter screen (333) passes through the filter layer (335) upwards. Furthermore, when it rises, since the filter layer (335) acts as a resistance layer to the flow of the refrigerant, the rising speed of the refrigerant can be reduced more significantly. The fibers of the cloth rise while changing the direction, so they are rectified, and the local high-speed flow is also eliminated, preventing the generation of bias flow, forming a uniform upward flow as a whole and passing through the refrigerant passage hole (353a) of the pressing part (350). ), into the tank interior space (310).

The liquid refrigerant introduced into the tank inner space (310) in this way generates retentate (R) without disturbance. In addition, the gas (gas refrigerant) mixed into the liquid refrigerant rising through the filter layer (335) or generated, the flow rate is sharply reduced when passing through the filter layer (335) and rising, and when it reaches the stored liquid ( R) After that, rising from the liquid without disturbing the liquid surface, the bubbles burst peacefully, rise above the gas-liquid interface, and remain in the form of gaseous refrigerant.

Of the liquid refrigerant stored in the retained liquid (R), only the stable liquid refrigerant stored at the bottom passes through the outflow side filter (343) of the pressing part (350) and is introduced into the outflow hole (3b) of the storage tank .

The refrigerant introduced into the outflow hole (3b) of the storage tank in this way is introduced into the outflow passage (4b) of the flange block (4), and is introduced into the supercooling part (2) through the outflow passage (4b).

The liquid refrigerant introduced into the supercooling part (2) is supercooled by the outside air while circulating in the supercooling part (2), and then flows out through the supercooling part outlet (2b).

In this way, the liquid refrigerant flowing out of the heat exchanger with the storage tank is decompressed and expanded through the expansion valve, absorbs heat from the outside air in the evaporator, evaporates and gasifies, and then returns to the above-mentioned compressor. In this way, the refrigerant circulates in the refrigeration cycle of the refrigeration system, and the specified refrigeration performance can be obtained.

As described above, according to this embodiment, the condensed refrigerant introduced into the storage tank (3) can stably form the retentate (R) at a low speed, and at the same time, the air bubbles are efficiently and smoothly broken, so that the refrigerant can be enclosed In the stable region of the quantity, only the stable liquid refrigerant can be pumped with certainty. Therefore, since the liquid refrigerant can be stably supplied to the subcooling part of the heat exchanger, the refrigeration cycle can be operated in a stable state, and excellent refrigeration performance can be obtained. Furthermore, due to the expansion of the stable region, the liquid refrigerant can be stably supplied, so that the storage tank (3) can be reduced in size and performance, and the overall size, weight, and performance of the refrigeration system can be realized. At the same time, Refrigerant saving can also be realized.

Furthermore, since there is no need to install any piping components such as a refrigerant suction pipe in the storage tank (3), it is possible to reduce the number of parts, simplify the structure, and reduce costs, and the assembly work can also be easily performed. .

Furthermore, in this embodiment, since the filter layer (335) is formed as a resistance layer, it is not necessary to provide an additional resistance layer, and further reduction in the number of parts, simplification of the structure, and cost reduction can be achieved.

Moreover, in this embodiment, the flange block (4) used for storage tank connection is joined to the header (11) of the heat exchanger body (10) with its embedded part (42) in an embedded state, so it can save The installation space of the buried part (42) can be reduced, and compactness can be realized.

Furthermore, a flange-shaped partition (50) is integrally provided around the inlet of the inflow passage (4a) on the upper end surface of the embedded part (42), and the inside of one header (11) is partitioned by the partition (50). The condensing part (1) and the supercooling part (2) are formed, so there is no need to separately assemble a partition part for separating the condensing part (1) and the supercooling part (2). Therefore, the number of components can be reduced, and at the same time, the assembly work can be easily performed, thereby achieving cost reduction.

Furthermore, since a part (42) of the flange block (4) is embedded in one header (11), the storage tank (3) joined to the flange block (4) can be made as close to one header as possible. (11), the whole heat exchanger can be further miniaturized.

Moreover, in this embodiment, since the inflow side of the inflow passage (4a) of the flange block (4) is lowered downward, the outflow-side end of the inflow passage (4a) is set lower than the inflow-side end. Therefore, the installation position of the storage tank (3) can be set at the bottom as a whole, so as the storage tank (3), a long size can be used. Thereby, it is possible to ensure that the tank capacity of the storage tank (3) is large enough, to expand the stable region of the refrigerant in the supercooled state, to prevent excessive and insufficient refrigerant encapsulation, to obtain stable refrigeration performance, and to Improve cooling performance.

Furthermore, since the storage tank (3) with a long size can be used, not only can the tank capacity be ensured to be large enough, but also a tank with a small diameter can be used, which can further realize miniaturization and simplification.

In addition, in this embodiment, the descending passage (40a) of the inflow passage (4a) of the flange block (4) is inclined relative to the axis center of the header (11), and at the same time, the descending passage (40a) is The upper opening surface is relatively perpendicular to the axis of the header (11), so the upper opening area of the descending flow path (40a) can be formed larger than the flow path area in the middle of the descending flow path (40a). Since the opening area of the upper end of the descending flow path (40a) can be formed larger in this way, the refrigerant can be introduced efficiently and smoothly, the pressure loss can be reduced, the refrigerant can be supplied in a more stable state, and the refrigeration efficiency can be further improved. performance.

For reference, in this embodiment, the upper end opening area (condenser outlet 1b) of the descending passage (40a) is set to about 62mm2.

In addition, in the above embodiment, the inlet and outlet member is formed relatively separately from the tank body, but the present invention is not limited thereto, and it is also applicable to the case where the inlet and outlet member is integrally formed with the tank body.

In addition, obviously, the number of channels of the heat exchanger body, the number of heat exchange tubes of each channel, etc. are not limited to the above examples.

In addition, in the above-mentioned embodiment, the case where the storage tank (3) is assembled to the supercooling part integrated heat exchanger was described as an example, but the present invention is not limited thereto, and the storage tank (3) can also be It can be mounted on heat exchangers such as condensers without a subcooler.

Furthermore, when assembling the storage tank (3) to the heat exchanger, it is not necessary to use the flange block (4), and it may be connected with a refrigerant pipe or the like.

In addition, in the above-mentioned embodiment, the desiccant layer (312) is arranged on the upper end of the tank body (30), but the present invention is not limited thereto, and the desiccant layer (312) can also be fixed on the tank body (30). The middle part or the lower part, and further, the desiccant layer can also be set in the tank body in a free state.

Furthermore, as the filter layer (335), it is not necessary to use non-woven fabrics, and other fiber interlaced bodies, such as textiles or braids, etc., can also be used. Furthermore, in addition to fiber products, it is also possible to use filter layers formed by desiccants such as molecular sieves. products. The main thing is that any thing can be used as long as it can provide frictional resistance to the refrigerant flow.

Possibility of industrial use

The storage tank for refrigeration cycle, the heat exchanger with storage tank and the condensing device for refrigeration cycle described in this invention are suitable for use in air-conditioning systems for automobiles, households, and businesses.

Claims (31)

1. kind of refrigeration cycle holding vessel, it is to store condensating refrigerant, only extract the kind of refrigeration cycle holding vessel of liquid refrigerant, it is characterized in that:

Possess on lower wall, be formed with jar in jar body of tubular of the cold-producing medium ostium that is connected of space and cold-producing medium tap hole;

The upper end open position of aforementioned cold-producing medium ostium is configured in the position lower than the upper end open position of aforementioned cold-producing medium tap hole;

Be provided with the resistant layer of the flow velocity reduction that makes cold-producing medium by seeing through of cold-producing medium at the upper end open place of aforementioned cold-producing medium ostium;

And constitute the cold-producing medium that flows into from aforementioned cold-producing medium ostium, upwards see through aforementioned resistant layer, generate in the space in aforementioned jar and retain liquid, this liquid refrigerant that retains liquid flows out by aforementioned cold-producing medium tap hole simultaneously.

2. kind of refrigeration cycle holding vessel according to claim 1, wherein, the upper end open peripheral recesses of the aforementioned cold-producing medium ostium of aforementioned jar body lower wall upper face side and form depressed part, the aforementioned resistant layer of configuration in this depressed part.

3. kind of refrigeration cycle holding vessel according to claim 1, wherein, the top position of aforementioned resistant layer is configured in the position lower than the upper end open position of aforementioned cold-producing medium tap hole.

4. kind of refrigeration cycle holding vessel according to claim 1, wherein, aforementioned resistant layer has a plurality of dispersion streams that are used to make cold-producing medium to disperse to the hole enlargement direction of aforementioned jar of body.

5. kind of refrigeration cycle holding vessel according to claim 1, wherein, aforementioned resistant layer constitutes by the filter course that is formed by the fiber interlace.

6. kind of refrigeration cycle holding vessel according to claim 1, wherein, the upper end open place of the aforementioned cold-producing medium ostium of side disposes the inflow side filter screen below aforementioned resistant layer.

7. kind of refrigeration cycle holding vessel according to claim 1, wherein, the upper end open place at aforementioned cold-producing medium tap hole disposes the outflow side filter screen.

8. kind of refrigeration cycle holding vessel according to claim 1, wherein, the inside at aforementioned jar of body is provided with the pressed part that is used for keeping with the state of pushing aforementioned resistant layer downwards.

9. kind of refrigeration cycle holding vessel according to claim 1, wherein, aforementioned jar of body possesses gateway parts and the main tank component of formation from pars intermedia to upper lateral part that constitutes the following side that comprises its lower wall.

10. kind of refrigeration cycle holding vessel according to claim 1, wherein, the upper lateral part in space disposes the drier packed layer with stationary state in aforementioned jar.

11. kind of refrigeration cycle holding vessel according to claim 1 wherein, in the space, disposes the drier filling component with free state in aforementioned jar.

12. the heat exchanger with holding vessel is characterized in that possessing:

Heat exchanger body, its have be provided with at interval and abreast a pair of collector of configuration, a plurality of heat-exchange tubes that two ends and two collectors are connected and being used to the condensation part that the cold-producing medium by aforementioned hot exchange pipework condensation flows out is exported;

On lower wall, be formed with jar in the holding vessel of tubular of the holding vessel ostium that is connected of space and holding vessel tap hole; With

Be used for to import to the refrigerant passage of aforementioned holding vessel ostium from the cold-producing medium that the outlet of aforementioned condensation part is flowed out;

The upper end open position of wherein aforementioned holding vessel ostium is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole;

Be provided with the resistant layer of the flow velocity reduction that makes cold-producing medium by seeing through of cold-producing medium at the upper end open place of aforementioned holding vessel ostium;

And constitute the cold-producing medium that flows into from aforementioned holding vessel ostium and upwards see through aforementioned resistant layer, generate in the space in aforementioned jar and retain liquid, this liquid refrigerant that retains liquid flows out by aforementioned holding vessel tap hole simultaneously.

13. the heat exchanger of band holding vessel according to claim 12, wherein, the upper end open peripheral recesses of the aforementioned holding vessel ostium of aforementioned holding vessel lower wall upper face side and form depressed part, the aforementioned resistant layer of configuration in this depressed part.

14. the heat exchanger of band holding vessel according to claim 12, wherein, the top position of aforementioned resistant layer is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole.

15. the heat exchanger of band holding vessel according to claim 12, wherein, aforementioned resistant layer has a plurality of dispersion streams that are used to make cold-producing medium to disperse to the hole enlargement direction of aforementioned holding vessel.

16. the heat exchanger of band holding vessel according to claim 12, wherein, aforementioned resistant layer constitutes by the filter course that is formed by the fiber interlace.

17. the heat exchanger with holding vessel is characterized in that possessing:

Heat exchanger body, its have be provided with at interval and abreast a pair of collector of configuration, a plurality of heat-exchange tubes that two ends and two collectors are connected, will aforementioned two collectors inside separate and will aforementioned a plurality of heat-exchange tubes be separated into condensation part and supercooling portion partition member, be used to make the condensation part of condensed refrigerant outflow to export and the supercooling portion that is used to make cold-producing medium to flow into aforementioned supercooling portion enters the mouth by aforementioned condensation part;

On lower wall, be formed with jar in the holding vessel of tubular of the holding vessel ostium that is connected of space and holding vessel tap hole; With

Be used for and import to aforementioned holding vessel ostium from the cold-producing medium that the outlet of aforementioned condensation part is flowed out, and will import to the refrigerant passage of aforementioned supercooling portion inlet from the cold-producing medium that aforementioned holding vessel tap hole flows out;

The upper end open position of wherein aforementioned holding vessel ostium is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole;

Be provided with the resistant layer of the flow velocity reduction that makes cold-producing medium by seeing through of cold-producing medium at the upper end open place of aforementioned holding vessel ostium;

And constitute the cold-producing medium that flows into from aforementioned holding vessel ostium and upwards see through aforementioned resistant layer, generate in the space in aforementioned jar and retain liquid, this liquid refrigerant that retains liquid flows out by aforementioned holding vessel tap hole simultaneously.

18. the heat exchanger of band holding vessel according to claim 17, wherein, the upper end open peripheral recesses of the aforementioned holding vessel ostium of aforementioned holding vessel lower wall upper face side and form depressed part, the aforementioned resistant layer of configuration in this depressed part.

19. the heat exchanger of band holding vessel according to claim 17, wherein, the top position of aforementioned resistant layer is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole.

20. the heat exchanger of band holding vessel according to claim 17, wherein, aforementioned resistant layer has a plurality of dispersion streams that are used to make cold-producing medium to disperse to the hole enlargement direction of aforementioned holding vessel.

21. the heat exchanger of band holding vessel according to claim 17 is characterized in that, aforementioned resistant layer constitutes by the filter course that is formed by the fiber interlace.

22. a condensing unit for refrigerating-cycle is characterized in that possessing:

Have and be used to make the condensation part of condensation of refrigerant and be provided with the condenser that is used to make the condensation part outlet of flowing out by this condensation part condensed refrigerant;

On lower wall, be formed with jar in the holding vessel of tubular of the holding vessel ostium that is connected of space and holding vessel tap hole; With

Be used for to import to the refrigerant passage of aforementioned holding vessel ostium from the cold-producing medium that the outlet of aforementioned condensation part is flowed out;

The upper end open position of wherein aforementioned holding vessel ostium is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole.

Be provided with the resistant layer of the flow velocity reduction that makes cold-producing medium by seeing through of cold-producing medium at the upper end open place of aforementioned holding vessel ostium;

And constitute the cold-producing medium that flows into from aforementioned holding vessel ostium and upwards see through aforementioned resistant layer, the space generates and retains liquid in aforementioned jar, and this liquid refrigerant that retains liquid flows out by aforementioned holding vessel tap hole simultaneously.

23. the heat exchanger of band holding vessel according to claim 22, wherein, the upper end open peripheral recesses of the aforementioned holding vessel ostium of aforementioned holding vessel lower wall upper face side and form depressed part, the aforementioned resistant layer of configuration in this depressed part.

24. the heat exchanger of band holding vessel according to claim 22, wherein, the top position of aforementioned resistant layer is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole.

25. the heat exchanger of band holding vessel according to claim 22, wherein, aforementioned resistant layer has a plurality of dispersion streams that are used to make cold-producing medium to disperse to the hole enlargement direction of aforementioned holding vessel.

26. the heat exchanger of band holding vessel according to claim 22, wherein, aforementioned resistant layer constitutes by the filter course that is formed by the fiber interlace.

27. a condensing unit for refrigerating-cycle is characterized in that possessing:

Have and be used to make the condensation part of condensation of refrigerant and be provided with the condenser that is used to make the condensation part outlet of flowing out by this condensation part condensed refrigerant;

On lower wall, be formed with jar in the holding vessel of tubular of the holding vessel ostium that is connected of space and holding vessel tap hole;

Has the subcooler that is used to make liquid refrigerant overcooled supercooling portion and is provided with the supercooling portion inlet that is used to make liquid refrigerant flow into this supercooling portion;

Be used for to import to the 1st refrigerant passage of aforementioned holding vessel ostium from the cold-producing medium that the outlet of aforementioned condensation part is flowed out; With

Be used for to offer the 2nd refrigerant passage of aforementioned subcooler inlet from the cold-producing medium that aforementioned holding vessel tap hole flows out;

The upper end open position of wherein aforementioned holding vessel ostium is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole;

Be provided with the resistant layer of the flow velocity reduction that makes cold-producing medium by seeing through of cold-producing medium at the upper end open place of aforementioned holding vessel ostium;

And constitute the cold-producing medium that flows into from aforementioned holding vessel ostium and upwards see through aforementioned resistant layer, generate in the space in aforementioned jar and retain liquid, this liquid refrigerant that retains liquid flows out by aforementioned holding vessel tap hole simultaneously.

28. the heat exchanger of band holding vessel according to claim 27, wherein, the upper end open peripheral recesses of the aforementioned holding vessel ostium of aforementioned holding vessel lower wall upper face side and form depressed part, the aforementioned resistant layer of configuration in this depressed part.

29. the heat exchanger of band holding vessel according to claim 27, wherein, the top position of aforementioned resistant layer is configured in the position lower than the upper end open position of aforementioned holding vessel tap hole.

30. the heat exchanger of band holding vessel according to claim 27, wherein, aforementioned resistant layer has a plurality of dispersion streams that are used to make cold-producing medium to disperse to the hole enlargement direction of aforementioned holding vessel.

31. the heat exchanger of band holding vessel according to claim 27, wherein, aforementioned resistant layer constitutes by the filter course that is formed by the fiber interlace.

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