JPH07243720A - Refrigerating apparatus - Google Patents

Abstract

PURPOSE:To prevent the refrigerating capacity of a refrigerator for a vehicle from being deteriorated by avoiding the decrease of thermal radiation area of a refrigerant condenser integrally constructed with a liquid receiver without raising assembly costs and product costs. CONSTITUTION:Dryer 34 consisting of a large number of desiccants is included in a metal pipe of a straight tubular shape and filters 35, 36 are inserted into both end sides of the dryer 34. Holders 37, 38 are further inserted into filter 35, 36 sides. The dryer 34 and the filter 35, 36 are located before the metal pipe is bent at specified points in order to form bent parts 44, 49-51. Thus, a dryer complete 9 is prepared. The dryer complete 9 is installed in a refrigeration cycle 8 as one of a plurality of liquid pipes which connect inlets of an expansion valve 5 with outlets of a refrigerant condenser 3 integrally formed with a liquid receiver.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system having a dryer inserted in a liquid refrigerant pipe from the outlet of a refrigerant condenser to the inlet of an expansion valve.

[0002]

2. Description of the Related Art In recent years, for example, in refrigeration systems for vehicles,
Many refrigeration cycles using a liquid-receiver-integrated refrigerant condenser in which a liquid receiver is integrated with a refrigerant condenser are being proposed for the purpose of improving mountability on a vehicle. Among them, 5-2
Japanese Patent No. 6442 discloses a technique in which a dryer is enclosed in the liquid receiving portion of the refrigerant condenser for the purpose of removing water in the refrigeration cycle.

Further, conventionally, a drier is not enclosed in the receiver and a drier is enclosed inside the drier, and the drier complete is connected to the outlet of the refrigerant condenser and the inlet of the expansion valve. A technique is also known in which a plurality of liquid refrigerant pipes are connected in the middle.

[0004]

However, in the former conventional technique, the dryer is enclosed in the liquid receiving portion of the refrigerant condenser, and in order to obtain dehydration performance by the dryer to some extent, the enclosed portion of the dryer is The volume must be increased. Therefore, the size of the liquid receiving portion of the refrigerant condenser becomes considerably large, and a large mounting space is required. Therefore, when it is not possible to take up a large installation space like in the engine room of a vehicle, that is,
If the installation space is fixed, the core area of the refrigerant condenser, that is, the heat dissipation area of the refrigerant condenser cannot be installed in the vehicle's engine room due to the increase in the size of the liquid receiving section. Become. As a result, there is a problem that the refrigerating capacity of the vehicle refrigerating apparatus is reduced because the heat radiating area of the refrigerant condenser is smaller than that in the case where the dryer is not enclosed in the liquid receiving portion.

Further, in the latter technique, it is necessary to newly install a dryer complete in which a dryer is enclosed and to newly connect this dryer complete in the middle of two liquid refrigerant pipes, so that the assembly cost and the product can be improved. There was a problem of increasing the cost.

An object of the present invention is to provide a refrigerating apparatus capable of preventing a reduction in heat dissipation area of a refrigerant condenser and a reduction in refrigerating capacity without increasing assembly cost and product cost. .

[0007]

According to the present invention, there is provided a refrigerant condenser for condensing and liquefying a refrigerant flowing thereinto, a pressure reducing means for reducing the pressure of the liquid refrigerant flowing from the refrigerant condenser, and an outlet of the refrigerant condenser. A technical means including a liquid refrigerant pipe that is connected to the inlet of the pressure reducing means and through which the liquid refrigerant flows and a dryer that is enclosed in the liquid refrigerant pipe and removes water in the liquid refrigerant is adopted.

The refrigerant condenser is connected to a condensing part for condensing and liquefying the refrigerant flowing inside, and the outlet side end part of the condensing part. The refrigerant flowing into the inside is separated into gas and liquid, and only the liquid refrigerant is mentioned above. You may comprise by the liquid receiving part which flows out in a liquid refrigerant pipe.

Then, the dryer may be enclosed in a bent portion formed in the liquid refrigerant pipe. Further, the dryer may be enclosed in a plurality of filter bags for filtering the liquid refrigerant, and the plurality of filter bags may be connected in a bead shape. Further, two filters for filtering the liquid refrigerant may be provided before and after the dryer in the liquid refrigerant pipe, and the two filters may be fixed in the liquid refrigerant pipe by a holder through which the liquid refrigerant can pass. .

[0010]

According to the present invention, the liquid refrigerant condensed and liquefied when passing through the inside of the refrigerant condenser flows into the liquid refrigerant pipe connecting the outlet of the refrigerant condenser and the inlet of the pressure reducing means, and the liquid refrigerant is When passing through the pipe, moisture is removed by a dryer enclosed in the liquid refrigerant pipe.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a description will be given of a plurality of embodiments in which the refrigerating apparatus of the present invention is applied to a vehicle refrigerating apparatus.

[Structure of First Embodiment] FIGS. 1 and 2 show a first embodiment of the present invention, and FIG. 1 is a view showing a refrigerating cycle of a vehicle refrigerating apparatus. In a vehicle refrigeration system 1, a refrigerant compressor 2, a receiver-integrated refrigerant condenser 3, a sight glass 4, an expansion valve 5 and a refrigerant evaporator 6 are sequentially connected by a refrigerant pipe 7 made of a metal pipe, a rubber pipe or the like. Constitutes a refrigeration cycle 8. The refrigerant compressor 2 is
Rotational power is transmitted from a driving means (not shown) such as an engine or a motor installed in an engine room (not shown) of a vehicle through an engagement / disengagement means (not shown) such as an electromagnetic clutch. When the rotational power is transmitted from the driving means, the refrigerant compressor 2 compresses the gas refrigerant sucked into the inside of the refrigerant evaporator 6 to transfer the high-temperature and high-pressure gas refrigerant to the receiver-integrated refrigerant condenser 3 To discharge.

The liquid-receiver-integrated refrigerant condenser 3 is integrally attached to a place in the engine room of the vehicle where the traveling wind is likely to be received via a mounting bracket (not shown). The liquid receiver integrated refrigerant condenser 3 is connected to the core portion 11 for heat exchange, the first header 12 connected to one end side of the core portion 11 in the horizontal direction, and the other end side of the core portion 11. The second header 13 and the like are manufactured and integrally brazed in a furnace.

The core portion 11 is composed of a condenser portion 14 and a supercooling portion 15, and side plates 16 and 17 for holding the shape of the core portion 11 are joined to the upper end portion and the lower end portion by means such as brazing. There is. The condenser unit 14 includes a plurality of condenser tubes 18 and a plurality of corrugated fins 19.
Which are joined by means such as brazing. The condensing unit 14 functions as a condensing unit that condenses and liquefies the refrigerant by heat-exchanging the gas refrigerant flowing in from the refrigerant compressor 2 with the outdoor air sent by a cooling fan (not shown) or the like.

The supercooling section 15 comprises a plurality of supercooling tubes 20 and a plurality of corrugated fins 21, which are joined by means such as brazing. The subcooling unit 15 is provided below and adjacent to the condensing unit 14,
It acts as a supercooling means for supercooling the liquid refrigerant by exchanging heat between the liquid refrigerant flowing into the inside and the outdoor air sent by a cooling fan or the like.

The plurality of condensing tubes 18 and the plurality of supercooling tubes 20 have a plurality of refrigerant passages (not shown) therein by extruding an aluminum alloy or the like having excellent corrosion resistance and thermal conductivity. It is manufactured in the shape of a flat tube. Further, in this embodiment, the number of condensing tubes 18 is made larger than the number of supercooling tubes 20, and according to experimental experience, the number of supercooling tubes 20 is 15% of the whole core portion 11. It is preferably about 20%.

The plurality of corrugated fins 19 and 21 are heat radiating fins for improving the heat radiation efficiency of the refrigerant, and both sides of a metal plate such as an aluminum alloy having excellent corrosion resistance and thermal conductivity are clad on the metal plates. By pressing the plate, the cross-sectional shape is formed into a corrugated shape.

Each of the first and second headers 12 and 13 is composed of a plurality of members and has a cylindrical shape extending in the vertical direction. The first and second headers 12 and 13 are corrosion resistant,
Both sides of a metal plate such as an aluminum alloy having excellent thermal conductivity are clad, and the metal plate is pressed or extruded to obtain a predetermined shape.

The first header 12 includes upstream ends of a plurality of condensing tubes 18 and a plurality of supercooling tubes 2.
The downstream end of 0 is joined by means such as brazing. Further, in the first header 12, the separator 22, the inlet pipe 23, and the outlet pipe 24 are joined by means such as brazing.

The separator 22 is a partitioning means which is formed in a substantially disc shape and divides the inside of the first header 12 into an inlet side communication chamber 25 and an outlet side communication chamber 26. The inlet-side communication chamber 25 includes the plurality of condensation tubes 1 in the core portion 11.
The room communicates only with the upstream end of No. 8. The outlet side communication chamber 26 includes a plurality of supercooling tubes 20 of the core portion 11.
It is a room that communicates only with the downstream end.

The inlet pipe 23 has a circular pipe shape and is an inflow means for inflowing the high-temperature, high-pressure gas refrigerant discharged from the discharge port of the refrigerant compressor 2 into the inlet-side communication chamber 25, such as brazing. It is joined to the first header 12 by the above means. The outlet pipe 24 has a circular pipe shape, and the outlet side communication chamber 2
An outflow means for outflowing the liquid refrigerant in 6 to the refrigerant pipe 7, which is joined to the first header 12 by means such as brazing.

In the second header 13, the downstream ends of the plurality of condensing tubes 18 and the upstream ends of the plurality of supercooling tubes 20 are joined by means such as brazing. The second header 13 includes an inner plate 131, an outer plate 132, and a tank 133 that forms the liquid receiving section 29, and caps 134 and 135 that close the openings at both ends.
Is equipped with. The inner plate 131 and the outer plate 132 are manufactured by molding a metal plate such as an aluminum alloy whose both sides are clad by press working. The outer plate 132 is formed with a claw-shaped locking portion (not shown) by press working, and is also formed with the refrigerant inflow port 30 and the refrigerant outflow port 31.

The tank 133 is an extruded product of aluminum alloy or the like, and has a refrigerant inlet 30 and a refrigerant outlet 31 formed by an additional process such as press working. Then, the outer plate 132 and the tank 133 are joined by brazing in the furnace after the claw-like engaging portions of the outer plate 132 are inserted into the refrigerant inlet port 30 and the refrigerant outlet port 31 on the tank 133 side and caulked, respectively. To be done. In addition, the tank 133 is
A metal plate such as an aluminum alloy whose both sides are clad-processed and processed into a tank shape by pressing may be used. Then, the outer plate 132 and the wall of the tank 133 form the first separator 27, and the first separator 27 and the inner plate 131 are provided with the second separator 27.
The separator 28 is joined by means such as brazing.

The first separator 27 is a partition means for partitioning a first chamber on the left side in the drawing into a second chamber (liquid receiving part) 29 on the right side in the drawing, and is a circular shape that connects the first and second chambers. And a circular refrigerant outlet 31 are formed. The second separator 28 is a partitioning unit that divides the inside of the first chamber into an upper communication chamber 32 and a lower communication chamber 33. The upper communication chamber 32 is a chamber that communicates only with the downstream ends of the plurality of condensation tubes 18. The lower communication chamber 33 is a chamber that communicates only with the upstream ends of the plurality of supercooling tubes 20.

The liquid receiving section 29 separates the gas-liquid two-phase refrigerant flowing from the condenser section 14 through the refrigerant inlet port 30 into a gas refrigerant and a liquid refrigerant, and a refrigerant outlet port 31 is provided. It functions as a liquid receiver that supplies only the liquid refrigerant to the subcooling unit 15 via the above.

The sight glass 4 is connected to the downstream side of the outlet of the receiver-integrated refrigerant condenser 3 and observes the state of the refrigerant circulating in the refrigeration cycle 8. The sight glass 4 is installed independently in a place where it is easily visible to an inspector in the engine room of the vehicle, for example, in the middle of the refrigerant pipe 7 adjacent to the receiver-integrated refrigerant condenser 3.

The expansion valve 5 is the pressure reducing means of the present invention,
It is connected between the outlet of the sight glass 4 and the inlet of the refrigerant evaporator 6, and expands the high-temperature, high-pressure liquid refrigerant flowing from the sight glass 4 into a low-temperature, low-pressure gas-liquid two-phase refrigerant. is there. The expansion valve 5 is a temperature-operated expansion valve that automatically adjusts the valve opening so that the refrigerant superheat on the outlet side of the refrigerant evaporator 6 is maintained at a predetermined value. Instead of the expansion valve 5, a pressure reducing means such as a capillary tube or a fixed throttle may be used.

The refrigerant evaporator 6 is connected between the outlet of the expansion valve 5 and the inlet of the refrigerant compressor 2 and blows the gas-liquid two-phase refrigerant flowing from the expansion valve 5 into the interior thereof with a blower (not shown). ) Is a cooling means for evaporating and evaporating the refrigerant by exchanging heat mainly with the outdoor air sent by rotation.

The refrigerant pipe 7 is connected to the liquid receiver integrated refrigerant condenser 3
(Generally two) liquid refrigerant pipes (refrigeration cycle 8) that connect the outlet pipe 24 of the
High-pressure piping, liquid piping). In addition, in this embodiment, one of the plurality of liquid refrigerant pipes is provided with a dryer 34, two filters 35, 3 inside.
6 and two holders 37, 38 are replaced with the dryer complete 9.

The dryer complete 9 is the liquid refrigerant pipe of the present invention, which is a metal pipe such as an aluminum alloy,
At both ends, there are contracted tube portions 41, 42 having a diameter smaller than that of the central portion. The contracted pipe portion 41 has a circular tubular shape, and a joint 43 for connecting to another pipe such as the outlet pipe 24 of the liquid receiver integrated refrigerant condenser 3 is attached to the outer periphery of the tip end. In addition, in order to effectively use a small mounting sparse, a bent portion 44 that is bent so as to change the flow direction of the liquid refrigerant is formed in the middle of the contracted pipe portion 41. Further, the contracted tube portion 42 is
It has a circular tubular shape and has a joint 45 attached to the outer periphery of the tip for connecting to another pipe such as the sight glass 4.

Between the contracted pipe portions 41 and 42, an expanded pipe portion 48 is formed in a circular tube shape via tapered portions 46 and 47 having a substantially conical shape. This expanded portion 48 is, for example, 1.5 m
It has a volume of × φ12, and in the middle thereof, bent portions 49 to 51 that are bent so as to change the flow direction of the liquid refrigerant are formed. With these bent portions 44, 49 to 51, the dryer complete 9 can be routed while avoiding a plurality of auxiliary machines in the engine room.
Can be installed in a place where it can be easily seen, and the small mounting sparse in the engine room can be effectively used.

Here, when the water concentration in the refrigerant becomes high,
The small holes of the decompression means such as the expansion valve 5 and the capillary tube are blocked by freezing, which greatly hinders the operation of the refrigeration cycle 8. In addition to this, the water in the Freon refrigerant containing chlorine causes hydrolysis of Freon, which produces highly corrosive hydrochloric acid (hydrogen chloride), and also causes sludge formation, which may cause corrosion of metal pipes. Make it easy to wake up. Further, it may cause a so-called plating phenomenon on the inner surface of the cylinder and the piston in the refrigerant compressor 2.

Therefore, in this embodiment, the refrigeration cycle 8 is used.
The drier 34 for removing the moisture therein is attached inside the pipe expanding portion 48 of the drier complete 9. Dryer 34
As the above, many freon-based refrigerant desiccants (synthetic zeolite, alumina gel, silica-alumina adsorbents such as silica gel) are used.

If foreign matter such as dust, sand, or metal is present in the refrigeration cycle 8, the expansion valve 5 or the valve mechanism of the refrigerant compressor 2 is caught and interferes with its operation, or sliding parts such as pistons and bearings. It is likely to cause burn-in. In addition, the desiccant of the dryer 34 may collapse during long-term use, or may be worn and pulverized to cause refrigeration cycle 8
By spilling in, the fines likewise cause problems.

Therefore, in this embodiment, the refrigeration cycle 8
Two filters 35 and 36 for removing foreign matters such as dust, sand, and metal therein are attached inside the expanded portion 48 of the dryer complete 9 so as to sandwich both sides of the dryer 34. As the two filters 35, 36, a filter material such as resin felt or fine mesh is used.
It is inserted so as to block the passage inside.

The two holders 37 and 38 are made of punching metal having a large number of small holes, and are press-fitted into the expanded tube portion 48 of the dryer complete 9. These holders 37 and 38 are holding means for holding and fixing the two filters 35 and 36 to both ends of the tube expanding portion 48 of the dryer complete 9, respectively. The two filters 35,
When a rigid material is used as the material of 36, the two holders 37 and 38 may not be provided.

[Manufacturing Method of First Embodiment] Next, a manufacturing method of the dryer complete 9 of this embodiment will be briefly described with reference to FIG. First, a dryer 34 of a predetermined amount (for example, 120 cc) is inserted into a straight metal pipe of, for example, φ12, two filters 35 and 36 on both sides of the dryer 34 are inserted, respectively.
Two holders 37, 38 are inserted on both sides of 5, 36, respectively.

Then, both ends of the metal pipe are drawn to form, for example, φ8 contracted pipe portions 41 and 42 and an expanded pipe portion 48, and tapered portions 46 and 4 connected to the contracted pipe portions 41 and 42.
The two holders 37 and 38 are fixed at 7, respectively, and the dryer 34 and the two filters 35 and 36 are positioned.

Then, predetermined portions of the contracted pipe portion 41 and the expanded pipe portion 48 are bent to form the bent portions 44, 49 to 51, and the dryer complete 9 is manufactured. After that, the joint 43 is joined to the outer periphery of the distal end of the reduced tube portion 41 of the dryer complete 9 by means such as welding, brazing, or caulking. Also, in the same manner, the dryer complete 9
A joint 45 is joined to the outer circumference of the distal end of the contracted pipe portion 42 by means such as welding, brazing, and caulking.

[Operation of First Embodiment] Next, the operation of the vehicle refrigeration system 1 of this embodiment will be briefly described with reference to FIG. When the operation of the vehicle refrigeration system 1 is started, the refrigerant compressor 2 is rotationally driven by a driving means such as an engine or a motor and compresses the gas refrigerant sucked through the suction port.

Therefore, the high temperature and high pressure gas refrigerant discharged from the discharge port of the refrigerant compressor 2 flows into the inlet side communication chamber 25 of the first header 12 through the inlet pipe 23. The gas refrigerant that has flowed into the inlet-side communication chamber 25 is
5, a plurality of condensing tubes 18 constituting the condensing section 14
Will be distributed to.

The gas refrigerant distributed to the plurality of condensing tubes 18 is condensed and liquefied by exchanging heat with the outdoor air through the corrugated fins 19 when passing through these condensing tubes 18. Almost liquid refrigerant, leaving gas refrigerant. The refrigerant in such a gas-liquid two-phase state is transferred from the plurality of condensing tubes 18 to the upper communication chamber 32 of the second header 13.
Flows in. The gas-liquid two-phase refrigerant that has flowed into the upper communication chamber 32 is temporarily collected and then collected in the first separator 27.
It flows into the liquid receiving part 29 through the refrigerant inlet port 30 formed in.

In the liquid receiving portion 29, the velocity of the refrigerant is reduced by increasing the cross-sectional area to some extent (for example, 500 mm ² ), and the buoyancy of the bubble-like gas refrigerant is used for gas-liquid separation. Further, by providing the second separator 28 in the second header 13, the plurality of condensing tubes 18
The flow path length from the downstream end of the lowermost condensing tube 18 to the upstream end of the lowermost supercooling tube 20 of the plurality of supercooling tubes 20 is long.

In addition, the second separator 28 allows the refrigerant flowing from the plurality of condensing tubes 18 into the second header 13 to make a U-turn and flow out to the plurality of supercooling tubes 20. The refrigerant in the liquid two-phase state is separated into gas and liquid by the centrifugal force, and the gas refrigerant in the form of bubbles is gathered in one place (inner side).

That is, the refrigerant inlet 30 is located in the upper communication chamber 3
Since the refrigerant inflow port 30 and the refrigerant outflow port 31 are relatively close to each other, the refrigerant in the gas-liquid two-phase state is the refrigerant inflow port 30 → the liquid receiving part 29 → the refrigerant outflow port. When passing through 31, the liquid refrigerant with a large specific gravity is
The gas-like gas refrigerant having a small specific gravity moves to the outside of the header 13 and collects in the upper part of the liquid receiving part 29.

Therefore, since the refrigerant in the gas-liquid two-phase state is efficiently gas-liquid separated in the liquid receiving section 29, the gas refrigerant accumulates in the upper part of the liquid receiving section 29 and the liquid refrigerant accumulates in the lower part. Therefore, if the refrigerating cycle 8 is filled with a sufficient amount of refrigerant to form a gas-liquid interface in the liquid receiving section 29, the refrigerant outlet 31 located below the liquid receiving section 29 does not have a supercooling degree. Only the liquid refrigerant flows into the lower communication chamber 33. The liquid refrigerant that has flowed into the lower communication chamber 33 has a plurality of supercooling tubes 20 that constitute the supercooling unit 15 in the lower communication chamber 33.
Will be distributed to.

The liquid refrigerant distributed to the plurality of supercooling tubes 20 is supercooled by exchanging heat with the outdoor air via the corrugated fins 21 when passing through the supercooling tubes 20. It becomes a liquid refrigerant having a cooling degree and flows into the outlet side communication chamber 26 of the first header 12.

The liquid refrigerant flowing into the outlet side communication chamber 26 is
It flows into the dryer complete 9 through the outlet pipe 24. The liquid refrigerant flowing into the dryer complete 9 is
It passes through the bent portion 44 of the contracted pipe portion 41 and flows into the expanded pipe portion 48 through a large number of small holes of the holder 37. The liquid refrigerant that has flowed into the expanded pipe portion 48 passes through the filter 3 when passing through the filter 35.
After removing foreign matters such as dust, sand, and metal in 5, the moisture in the liquid refrigerant is removed by the dryer 34. The liquid refrigerant from which the water has been removed collapses in the filter 36 when passing through the filter 36, and the fine powder of the desiccant pulverized by abrasion is removed, and passes through the small holes of the holder 38 to reduce the contracted pipe portion 42.
Flows in.

The liquid refrigerant flowing into the contracted pipe portion 42 flows out from the other end of the dryer complete 9 and then flows into the expansion valve 5 through the sight glass 4. The liquid refrigerant that has flowed into the expansion valve 5 rapidly expands when passing through the expansion valve 5 to become a mist-like refrigerant. The atomized refrigerant is heat-exchanged with the air that flows into the refrigerant evaporator 6 and blows into the vehicle compartment to be evaporated and vaporized, and then sucked from the suction port of the refrigerant compressor 2. The air that has exchanged heat with the refrigerant and is cooled is blown into the vehicle interior.
Then, by repeating the above operation, the vehicle interior is cooled.

[Effects of the First Embodiment] As described above, the vehicle refrigeration system 1 includes the liquid receiving section 2 of the liquid receiver integrated refrigerant condenser 3.
Since the dryer 34 is not enclosed in the liquid receiving unit 9, the liquid receiving unit 29 does not become large even when the mounting space of the liquid receiver integrated refrigerant condenser 3 is constant. Therefore, it is not necessary to reduce the area of the core part 11 of the receiver-integrated refrigerant condenser 3, that is, the heat radiation area of the receiver-integrated refrigerant condenser 3, so that the refrigerating capacity of the vehicle refrigeration system 1 is reduced. Can be prevented.

Further, since foreign matter and water in the refrigeration cycle 8 can be removed only by changing one liquid refrigerant pipe to the dryer complete 9, it is not necessary to increase the number of liquid refrigerant pipes. Therefore, as compared with the conventional technique of connecting a dryer complete newly installed in the middle of the existing liquid refrigerant pipe, the number of assembling steps is reduced, and the assembling cost and the product cost can be reduced.

Furthermore, by providing the dryer complete 9 with the bent portions 44, 49 to 51, it is possible to secure a predetermined enclosure volume necessary for enclosing the dryer 34 of, for example, 120 cc even in a small mounting space. Dryer complete 9 with high degree of freedom in handling
Can be provided.

Since the liquid refrigerant flowing from the subcooling section 15 of the receiver-integrated refrigerant condenser 3 has a degree of supercooling, the liquid refrigerant in the dryer complete 9 and the liquid refrigerant pipe upstream of the expansion valve 5 will be discharged. The liquid refrigerant is not gasified due to the pressure loss. Therefore, the single-phase liquid refrigerant containing no gas refrigerant is supplied into the expansion valve 5, and therefore the refrigerant circulation amount of the liquid refrigerant flowing into the expansion valve 5 does not decrease. As a result, a sufficient amount of the atomized refrigerant is supplied into the refrigerant evaporator 6, so that the refrigerating capacity of the vehicle refrigerating apparatus 1 can be prevented from decreasing.

[Second Embodiment] FIG. 2 shows a second embodiment of the present invention, and is a view showing a vehicle refrigeration system.
In this embodiment, the dryer 34 is packed little by little in a filter bag 61 made of resin felt, and the dryer filter 62 in which the filter bags 61 are connected in a daisy chain is enclosed in a straight pipe-shaped metal pipe and then bent. I went there and made a dryer complete 9.

In this embodiment, since the dryer filter 62 can be enclosed while leaving a margin for the inner diameter of the metal pipe, the bending process can be facilitated as compared with the first embodiment. . Further, since the plurality of filter bags 61 act as filters for removing foreign matters such as dust, sand and metal, no filters or holders are required before and after the dryer 34 as in the first embodiment, which is excellent in economy.

[Modification] In this embodiment, the present invention is applied to the vehicle refrigeration system 1. However, the present invention may be applied to a stationary refrigeration system for factories, buildings, etc. It may be applied to a refrigeration system.

In this embodiment, the supercooling section 15 is provided in the liquid receiver integrated refrigerant condenser 3, but the supercooling section 15 may not be provided in the liquid receiver integrated refrigerant condenser 3. Further, the number of bent portions of the dryer complete 9 can be freely selected according to the positional relationship between the refrigerant condenser and the expansion valve.

In this embodiment, the dryer 34 is enclosed in the dryer complete 9 which connects the outlet of the receiver-integrated refrigerant condenser 3 and the inlet of the sight glass 4, but the outlet of the sight glass 4 and the expansion valve 5 are enclosed. A dryer may be enclosed in the liquid pipe connecting the inlet of the.

Further, a dryer is enclosed in a liquid pipe that connects the outlet of the receiver-integrated refrigerant condenser not provided with the supercooling section 15 and the inlet of a separately provided supercooler (refrigerant supercooler). Alternatively, a drier may be enclosed in the liquid pipe that connects the outlet of the super cooler (refrigerant subcooler) and the inlet of the expansion valve 5. The sight glass 4 may not be provided. Further, the dryer may be separately enclosed in two or more liquid pipes. That is,
Two liquid pipes may be used as a dryer complete.

[0060]

According to the present invention, since it is not necessary to reduce the heat radiation area of the refrigerant condenser even when the mounting space is constant, it is possible to prevent the refrigerating capacity of the refrigerating device from being lowered. Further, since it is not necessary to connect a dryer complete enclosing a dryer in the middle of the two liquid refrigerant pipes, the number of assembling steps can be reduced, and the assembling cost and the product cost can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a vehicle refrigeration system used in a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a vehicle refrigeration system used in a second embodiment of the present invention.

[Explanation of symbols]

 1 Refrigerating Device for Vehicle 3 Refrigerant Condenser with Integrated Receiver 5 Expansion Valve (Decompression Means) 8 Refrigeration Cycle 9 Dryer Complete (Liquid Refrigerant Piping) 11 Core Part 14 Condensing Part 29 Liquid Receiving Part 34 Dryer 35 Filter 36 Filter 37 Holder 38 Holder 44 Bent Part 49 Bent Part 50 Bent Part 51 Bent Part 61 Filtration Bag 62 Dryer Filter

Claims (5)

[Claims] 1. A refrigerant condenser for condensing and liquefying a refrigerant flowing into the inside, (b) a pressure reducing means for reducing the pressure of the liquid refrigerant flowing from the refrigerant condenser, and (c) an outlet of the refrigerant condenser. A refrigerating apparatus comprising: a liquid refrigerant pipe that connects the inlet of the decompressing means and a liquid refrigerant flows through the inside; and (d) a dryer that is sealed in the liquid refrigerant pipe to remove water in the liquid refrigerant. 2. The refrigerating apparatus according to claim 1, wherein the refrigerant condenser is connected to a condensing part for condensing and liquefying a refrigerant flowing inside, and an outlet side end part of the condensing part, and a refrigerant flowing into the inside. A refrigerating apparatus comprising: a liquid receiving section that separates gas and liquid into a liquid refrigerant to flow out into the liquid refrigerant pipe. 3. The refrigerating apparatus according to claim 1, wherein the dryer is enclosed in a bent portion formed in the liquid refrigerant pipe. 4. The refrigerating apparatus according to claim 3, wherein the dryer is enclosed in a plurality of filter bags for filtering the liquid refrigerant, and the plurality of filter bags are connected in a beaded shape. Refrigeration equipment to be. 5. The refrigerating apparatus according to claim 3, wherein the liquid refrigerant pipe has two filters for filtering the liquid refrigerant before and after the dryer, and the two filters allow the liquid refrigerant to pass therethrough. Refrigerating apparatus, wherein the refrigerating apparatus is fixed in the liquid refrigerant pipe by a simple holder.