JPH08219590A - Liquid reciver integration type refrigerant condenser - Google Patents

Abstract

PURPOSE: To provide a liquid receiver integration type refrigerant condenser which achieve a higher carrying property on a vehicle while reducing the number of parts of a refrigerating cycle as a whole to further reduce the cost. CONSTITUTION: A liquid receiver 9 for separating a gas and a liquid of a refrigerant flowing inside is joined on the rear of a first header 30 of a condenser body 8 having a plurality of flat tubes 25 and 27 for condensing and supercooling arranged in parallel to form a liquid receiver integration type refrigerant condenser 3 and a drier is housed in the liquid receiver 9. In exchanging of an old drier, a meltable plug 54 mounted at a lower end side opening of the liquid receiver 9 free to load or unload is removed to take out the old drier at the lower end side opening and a new drier is inserted into the liquid receiver 9 at the lower end opening to seal the lower end side opening of the liquid receiver 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid receiver integrated refrigerant condenser incorporated in a refrigerating cycle such as a vehicle air conditioner, a vehicle refrigerating device or a vehicle refrigerating device, in which the amount of refrigerant circulation can be varied. It is a thing.

[0002]

2. Description of the Related Art Conventionally, a liquid receiver and a refrigerant condenser of a refrigeration cycle of a vehicle refrigeration system are arranged separately and independently. Therefore, it is difficult to reduce the number of parts, that is, the cost is reduced, and since the receiver and the refrigerant condenser occupy the mounting space for each other, there is a problem that the demand for space saving cannot be met. Therefore, for the purpose of reducing the cost and improving the mountability on the vehicle, many liquid receiver-integrated refrigerant condensers in which the liquid receiver is integrated with the refrigerant condenser have been proposed.

Among them, German Patent Application Publication No. 42388.
Japanese Patent Laid-Open No. 53-43127 and Japanese Patent Laid-Open No. 4-43271 disclose a technique in which a drier is inserted into a liquid receiver of a liquid receiver integrated refrigerant condenser for the purpose of removing water in the refrigeration cycle. In addition, in these publications, in order to replace a dryer whose moisture absorption performance has deteriorated due to long-term use with a new dryer, the opening formed at the end of the liquid receiver has a removable bolt. The method allows the dryer to be taken in and out, or the dryer can be taken in and out by configuring the receiver with a cylindrical receiver body and a flange (upper lid) and making the flange detachable from the receiver body with a screw. Is disclosed.

[0004]

However, in the prior art, since the closing parts such as bolts and flanges are provided to seal the opening for taking in and out the dryer, the number of parts is increased in the entire refrigeration cycle. However, even if the liquid receiver and the refrigerant condenser were integrated to reduce the cost, the effect was not obtained so much.

An object of the present invention is to provide a receiver-integrated refrigerant condenser capable of improving the mountability and reducing the number of parts of the entire refrigeration cycle to further reduce the cost. Especially.

[0006]

According to a first aspect of the present invention, a condenser main body for condensing and liquefying a refrigerant, a dryer for removing water in a refrigeration cycle, and a condenser main body are provided integrally with each other. While accommodating the dryer in
A receiver main body having an opening that allows the dryer to be taken in and out, and a functional component of the refrigeration cycle,
A technical means including a sealing means (plug) that is detachably attached to the opening and prevents the refrigerant from leaking to the outside from the opening is adopted.

According to a second aspect of the present invention, in addition to the liquid receiver integrated refrigerant condenser according to the first aspect, the sealing means is a functional component having a function of enhancing the safety of the refrigeration cycle equipment. It is characterized by According to a third aspect of the invention, in addition to the receiver-integrated refrigerant condenser according to the second aspect, the functional component is melted when the refrigerant in the receiver body rises to an abnormal temperature or higher. It is a fusible plug having a hole in which a melting material that releases a refrigerant to the atmosphere is sealed.

According to a fourth aspect of the invention, in addition to the liquid receiver integrated refrigerant condenser according to the second aspect, the functional component is
It is a pressure switch for detecting an abnormal pressure inside the liquid receiver body. According to a fifth aspect of the present invention, in addition to the receiver-integrated refrigerant condenser according to the second aspect, when the refrigerant in the receiver main body rises to an abnormal pressure or higher, the functional component releases the refrigerant to the atmosphere. It is a relief valve that discharges to

[0009]

According to the invention described in claim 1, since the liquid receiver main body is integrated with the condenser main body, the mounting space can be saved and the mountability can be improved. Further, when replacing the dryer housed in the receiver body, first, the sealing means constituting the refrigeration cycle is removed from the opening formed at one end of the receiver body in the cylinder direction. Next, a new dryer is inserted into the liquid receiver main body through the opening, and the opening is sealed by the sealing means that constitutes the refrigeration cycle. This eliminates the need to replace the receiver body or the receiver-integrated refrigerant condenser when the dryer is replaced. Further, since the opening of the liquid receiver main body is not sealed by the component that does not constitute the refrigeration cycle, the number of components of the entire refrigeration cycle does not increase and the cost can be reduced.

According to the second aspect of the present invention, by using a functional component having a function of enhancing the safety of the refrigeration cycle equipment as the sealing means, troubles of the refrigeration cycle equipment can be prevented. According to the invention described in claim 3, when the high-pressure side pressure of the refrigeration cycle equipment such as the condenser body or the liquid receiver body becomes abnormally high, the dissolving material enclosed in the hole of the fusible plug melts. Then, the refrigerant is released to the atmosphere, so that the trouble of the refrigeration cycle equipment can be prevented.

According to the invention described in claim 4, when the high-pressure side pressure of the refrigeration cycle equipment such as the condenser main body or the liquid receiver main body becomes abnormally high or abnormally low, the pressure switch is provided. By issuing an instruction to stop the operation of the refrigeration cycle, it is possible to prevent troubles in the refrigeration cycle equipment. According to the invention described in claim 5, when the high-pressure side pressure of the refrigeration cycle equipment such as the condenser body or the receiver body becomes abnormally high, the relief valve opens to release the refrigerant to the atmosphere. As a result, the trouble of the refrigeration cycle device can be prevented.

[0012]

【Example】

[Structure of Embodiment] Next, a liquid receiver integrated refrigerant condenser of the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a view showing a liquid receiver integrated refrigerant condenser, and FIG. 2 is a view showing a refrigeration cycle of a vehicle refrigeration system.

The vehicle refrigeration system 1 includes a refrigerant compressor 2, a receiver-integrated refrigerant condenser 3, a sight glass 4, an expansion valve 5, a refrigerant evaporator 6 and a refrigerant pipe or the like connecting these in a receiver cycle. (Hereinafter referred to as refrigeration cycle) 7 is configured.

As shown in FIG. 2, the refrigerant compressor 2 is connected to an engine 11 installed in an engine room of a vehicle via a belt 12 and an electromagnetic clutch 13. When the rotational power of the engine 11 is transmitted, the refrigerant compressor 2 compresses the gas refrigerant sucked inside from the suction port,
It is a compressor that discharges a high-temperature and high-pressure gas refrigerant from a discharge port.

The sight glass 4 is, as shown in FIG.
The state of the refrigerant that is connected to the downstream side of the liquid receiver integrated refrigerant condenser 3 and circulates in the refrigeration cycle 7 is observed. The sight glass 4 is mounted independently in a place where the operator can easily see it in the engine room of the vehicle, for example, in the middle of the liquid refrigerant pipe forming the refrigerant pipe adjacent to the receiver-integrated refrigerant condenser 3. Has been done.

The sight glass 4 has a tubular sight glass body 14 whose both ends are connected to the middle of the liquid refrigerant pipe by means such as welding or fastening, and the sight glass body 14.
It is composed of a welded glass 16 and the like fitted in a viewing window 15 formed on the upper surface of the. In general, the viewing window 15
When bubbles are seen from the inside, the refrigerant is insufficient, and when no bubbles are seen, the amount of the refrigerant is proper. Further, strainers (filters) for capturing foreign matters such as dust and metal powder in the refrigeration cycle 7 are inserted in the liquid refrigerant pipes before and after the sight glass 4.

The expansion valve 5 is a decompression device for injecting a high-temperature and high-pressure liquid refrigerant through a small throttle hole to adiabatically expand it into a low-temperature and low-pressure atomized refrigerant (a refrigerant in a gas-liquid two-phase state).
In this embodiment, a temperature-operated expansion valve is used that automatically adjusts the valve opening so as to maintain the refrigerant superheat degree on the outlet side of the refrigerant evaporator 6 at a predetermined value.

The refrigerant evaporator 6 is connected to the downstream side of the expansion valve 5 and exchanges heat with the indoor air or the outdoor air blown by a blower (not shown) with the atomized refrigerant flowing into the inside of the expansion valve 5. It works as an evaporator that evaporates and vaporizes the refrigerant.

Next, the liquid receiver integrated refrigerant condenser 3 of this embodiment will be described in detail with reference to FIGS. The liquid receiver integrated refrigerant condenser 3 has, for example, a height of 300 mm to
It is a heat exchanger having a width of 400 mm and a width of 300 mm to 600 mm, which is installed in a place where the running air is easily received in the engine room of the vehicle, and in which the condenser body 8 and the liquid receiver 9 are integrated.

The condenser body 8 includes a core 20 for heat exchange,
A heat exchanger composed of a first header 30 arranged on one end side of the core 20 in the horizontal direction, a second header 40 arranged on the other end side of the core 20 in the horizontal direction, and the like. It is manufactured by integrally brazing in a furnace together with the liquid receiver 9.

The core 20 includes a condenser section 21 and a supercooling section 2
2, side plates 23 and 24 for fixing mounting brackets (not shown) for mounting the liquid receiver integrated refrigerant condenser 3 to the vehicle are joined to the upper and lower ends by means such as brazing. .

The condenser section 21 is connected to the discharge port of the refrigerant compressor 2 and heat-exchanges the gas refrigerant flowing from the discharge port of the refrigerant compressor 2 with the outdoor air sent by a cooling fan (not shown) or the like. It works as a condenser to condense and liquefy the refrigerant. The condensing part 21 is composed of a plurality of condensing flat tubes 25 and corrugated fins 26, which are joined by means such as brazing.

The supercooling section 22 is arranged below the condensing section 21, and the liquid refrigerant flowing from the liquid receiver 9 is heat-exchanged with the outdoor air sent by a cooling fan (not shown) or the like to generate the refrigerant. It works as a supercooler that supercools. The supercooling section 22 is composed of a plurality of supercooling flat tubes 27 and corrugated fins 28, which are joined by means such as brazing.

The plurality of condensing flat tubes 25 and the plurality of supercooling flat tubes 27 are arranged in parallel in the horizontal direction with a predetermined gap. Further, a plurality of condensing flat tubes 25 and a plurality of supercooling flat tubes 27
Is made of aluminum or aluminum alloy having excellent corrosion resistance and heat conductivity, and is formed into an elliptical shape having a flat cross section by extrusion processing, and has a plurality of refrigerant flow paths inside.

The corrugated fins 26 and 28 are heat radiating fins for improving the heat radiation efficiency (heat exchange efficiency) of the refrigerant, and are made of aluminum or aluminum alloy having excellent corrosion resistance and heat conductivity, and both side surfaces thereof. A metal plate clad with a brazing material is pressed into a corrugated shape.

The refrigerant flowing in the upper half of the plurality of condensing flat tubes 25 is the first header 30 to the second header 40.
The refrigerant flowing in the lower half of the plurality of condensing flat tubes 25 flows from the second header 40 to the first header 30, and the refrigerant flowing in the plurality of supercooling flat tubes 27 flows from the first header 30 to the second header 40. Flows to. Further, in this embodiment, the number of the condensing flat tubes 25 is made larger than the number of the supercooling flat tubes 27, and according to the experimental experience, the number of the supercooling flat tubes 27 is the total number of the cores 20. 15% to 20% is desirable.

The first header 30 comprises a header plate 31 having a substantially U-shaped cross section and a tank plate 32 having a semi-circular cross section, and has a cylindrical shape extending in the vertical direction. The first header 30 is made of aluminum or aluminum alloy having excellent corrosion resistance and thermal conductivity, and has a predetermined shape obtained by pressing a metal plate whose both sides are clad with a brazing material. .

In the first header 30, a separator (partition plate) 36 for partitioning the interior into an upper communication chamber 33 and an intermediate communication chamber 34, and an interior for the intermediate communication chamber 34 and a lower communication chamber 3 are provided.
A separator (partition plate) 37 for partitioning into 5 and 5 is provided.

The upper communication chamber 33 has an inlet pipe 38 on the upstream side.
And the downstream side communicates with the refrigerant passage of the upper half flat tube 25 for condensation. The upstream side of the intermediate communication chamber 34 communicates with the refrigerant passage of the lower flattening tube 25 for condensation, and the downstream side communicates with the liquid receiver 9. Further, in the lower communication chamber 35, the upstream side communicates with the inside of the liquid receiver 9, and the downstream side communicates with the refrigerant passages of the plurality of supercooling flat tubes 27. The inlet pipe 38 is a pipe for allowing the refrigerant discharged from the discharge port of the refrigerant compressor 2 to flow into the upper communication chamber 33.

The second header 40 is composed of a header plate 41 having a substantially U-shaped cross section and a tank plate 42 having a semi-circular cross section, and has a cylindrical shape extending in the vertical direction. The second header 40 is made of aluminum or aluminum alloy having excellent corrosion resistance and thermal conductivity, and has a predetermined shape obtained by pressing a metal plate whose both sides are clad with a brazing material. .

Inside the second header 40, there is provided a separator (partition plate) 45 which divides the inside into an upper communication chamber 43 and a lower communication chamber 44. The upstream side of the upper communication chamber 43 communicates with the refrigerant passage of the upper condensing flat tube 25 in the upper half, and the downstream side communicates with the refrigerant passage of the lower condensing flat tube 25 in the lower half. Further, in the lower communication chamber 44, the upstream side communicates with the refrigerant passages of the plurality of supercooling flat tubes 27,
The downstream side communicates with the outlet pipe 46. This outlet pipe 4
Reference numeral 6 is a pipe for sending the liquid refrigerant in the lower communication chamber 44 to the sight glass 4.

The liquid receiver 9 is a receiver for temporarily storing the refrigerant so that the refrigerant liquefied in the condenser body 8 can be supplied to the refrigerant evaporator 6 in response to the refrigerating load. Receiver 9
Is gas-liquid separated into a gas refrigerant and a liquid refrigerant from the gas-liquid two-phase refrigerant that has flowed into the inside from the condensing portion 21, and supplies only the liquid refrigerant to the supercooling portion 22.

The liquid receiver 9 has a gas-liquid separation chamber 5 inside.
0 is formed in the receiver body 51, the dryer 52 detachably accommodated in the receiver body 51, the receiver body 51
53 for closing the opening on the upper end side of the liquid receiver body 5
1 is composed of a fusible plug 54 or the like that closes the opening on the lower end side.

The liquid receiver main body 51 is made of aluminum or an aluminum alloy having excellent corrosion resistance, and is formed into a cylindrical shape by pressing a metal plate whose one surface is clad with a brazing material. The liquid receiver main body 51 is open at both ends in the cylinder direction, and is joined to the back surface of the tank plate 32 of the first header 30 by means such as brazing and caulking with a caulking piece 39.
The liquid receiver main body 51 has a refrigerant inlet 55 and a refrigerant outlet 56 formed at the joint with the tank plate 32.

The refrigerant inflow port 55 is connected to the first header 30.
Is a communication port that opens at the lower part of the intermediate communication chamber 34 (the lower part of the condensation part 21) and allows the refrigerant in the intermediate communication chamber 34 to flow into the gas-liquid separation chamber 50. The refrigerant outlet 56 is a communication chamber that opens below the refrigerant inlet 55 and allows the liquid refrigerant in the gas-liquid separation chamber 50 to flow into the lower communication chamber 35. Then, in this embodiment, the receiver body 51 and the first header 30
Although the tank plate 32 is formed separately, the liquid receiver body 51 and the tank plate 32 of the first header 30 may be integrally formed.

As the dryer 52, a large number of desiccants (hereinafter abbreviated as desiccants) 57 for CFC-based refrigerants such as synthetic zeolite, alumina gel, and silica-alumina adsorbents such as silica gel are used. If foreign matter such as dust or metal powder is present in the refrigeration cycle 7, it will be caught in the throttle hole of the expansion valve 5 or the valve mechanism of the refrigerant compressor 2 and prevent its operation, or in sliding parts such as pistons and bearings. It is likely to cause burn-in. Moreover, the desiccant 57 collapses during long-term use, is worn and pulverized, and flows out into the refrigeration cycle 7, so that the fine powder of the desiccant 57 also causes troubles in the refrigeration cycle equipment. give. Therefore, in this example, a large number of desiccants 57 are put in a filter bag 58 that functions as a filter for making fine powder fine. In addition, many desiccants 5
7 may be placed in a bag made of felt (waterproof heavy paper).

The cap 53 is joined to the opening on the upper end side of the liquid receiver main body 51 by means such as brazing. Soluble stopper 5
4 is a sealing means of the present invention, in which a special solder material (melting material: melting at 100 ° C. to 105 ° C.) 61 is poured into a hole 60 formed in the center of a bolt-shaped body 59 made of aluminum alloy. It is a melt bolt. That is,
The fusible plug 54 is for preventing troubles of the refrigeration cycle equipment such as the condenser body 8 and the liquid receiver 9, and is a functional component of the refrigeration cycle 7 having a safety function of enhancing the safety of the refrigeration cycle equipment.

The bolt-shaped main body 59 is the receiver main body 51.
Is fixed by being screwed into the cylindrical body 63 forming the lower end side opening 62 of the. Further, an O-ring 64 as a seal material is mounted between the outer circumference of the bolt-shaped main body 59 and the inner circumference of the cylindrical body 63 to prevent the refrigerant from leaking to the outside. The cylindrical body 63 is formed into a cylindrical shape by cutting a metal block, and is joined to the lower end of the liquid receiver body 51 by means such as brazing.

[Dryer Replacement Method] Next, the dryer replacement method of this embodiment will be briefly described with reference to FIGS. 1 and 3.

When the dryer 52 is used for a long period of time, the moisture absorption performance deteriorates, so that the moisture easily circulates in the refrigeration cycle 7. In this case, there is a possibility that the expansion valve 5 freezes in the throttle hole to impede the flow of the refrigerant, or cause the refrigeration cycle equipment to corrode.

In order to avoid the trouble of the refrigeration cycle equipment as described above, it is desirable to replace the old dryer 52 with a new dryer 52 after using the dryer 52 for a certain period of time. In this embodiment, when replacing the old dryer 52, the fusible plug 54 is attached to the receiver main body 51 with a tool.
After removing the dryer 52 older than the lower end side opening 62 from the liquid receiver main body 51, a new dryer 52 is removed from the lower end side opening 62.
Insert in 1.

Then, the fusible plug 54 in which the O-ring 64 is attached to the outer periphery of the bolt-shaped main body 59 is screwed into the tubular body 63 provided at the lower end of the liquid receiver main body 51 with a tool to open the lower end side opening 62. Seal it. Therefore, the dryer 52
Can be exchanged by exchanging only the dryer 52 without exchanging the liquid receiver 9 and the liquid receiver integrated refrigerant condenser 3, so that the exchanging work of the dryer 52 becomes extremely inexpensive. Further, since the dryer 52 can be replaced without replacing the fusible plug 54, the fusible plug 5 that can operate normally can be used.
It is not an uneconomical replacement work of replacing up to 4.

[Operation of Embodiment] Next, the operation of the vehicle refrigeration system 1 of this embodiment will be briefly described with reference to FIGS. 1 to 3.

When the operation of the vehicle refrigeration system 1 is started,
The electromagnetic clutch 13 is energized, and the refrigerant compressor 2 moves to the belt 1
It is rotationally driven by the engine 11 via 2 and the electromagnetic clutch 13. Therefore, the high-temperature and high-pressure gas refrigerant compressed and discharged in the refrigerant compressor 2 flows into the upper communication chamber 33 of the first header 30 through the inlet pipe 38. The gas refrigerant flowing into the upper communication chamber 33 is distributed to the upper half condensation flat tubes 25 in the upper communication chamber 33.

The upper flat tube 25 for condensation
The gas refrigerant distributed to the group is heat-exchanged with the outdoor air via the corrugated fins 26 when passing through the flattening tubes 25 for condensation, and is condensed and liquefied to become a gas-liquid two-phase refrigerant. It flows into the upper communication chamber 43 of the header 40. The gas-liquid two-phase state refrigerant that has flowed into the upper communication chamber 43 is in the lower communication flat tube 2 of the lower half in the upper communication chamber 43.
It is divided into 5 groups.

The flat tube 25 for condensation in the lower half
The gas refrigerant distributed to the groups is condensed and liquefied by exchanging heat with the outdoor air through the corrugated fins 26 when passing through these condensing flat tubes 25, and almost all of the gas refrigerant remains as a liquid refrigerant. Become. The refrigerant in the gas-liquid two-phase state flows into the intermediate communication chamber 34 of the first header 30 from the group of the flat tubes 25 for condensation in the lower half. Intermediate communication room 3
The refrigerant in the gas-liquid two-phase state that has flowed into 4 is once collected, then passes through the refrigerant inlet 55, and the gas-liquid separation chamber 5 of the liquid receiver 9 is collected.
It flows into 0. In the liquid receiver 9, the speed of the refrigerant is reduced by making its cross-sectional area large to some extent (for example, 500 mm ² ), and the buoyancy of the bubble-like gas refrigerant is used.

The separator 37 causes the refrigerant flowing from the plurality of condensing flat tubes 25 into the intermediate communication chamber 34 of the first header 30 to make a U-turn and flow out to the plurality of supercooling flat tubes 27. Therefore, the refrigerant in the gas-liquid two-phase state is separated into gas and liquid by the centrifugal force, and is collected in one place (inside) from the gas refrigerant in the form of bubbles.

That is, the refrigerant inlet 55 is located in the intermediate communication chamber 3
Since the refrigerant inflow port 55 and the refrigerant outflow port 56 are relatively close to each other, the refrigerant in the gas-liquid two-phase state is the refrigerant inflow port 55 → the gas-liquid separation chamber 50 → the refrigerant flow. Exit 56
When passing through, the liquid refrigerant having a large specific gravity is transferred to the outer portion of the gas-liquid separation chamber 50 due to the centrifugal force, and the bubble-like gas refrigerant having a small specific gravity is collected in the inner portion.

Therefore, the refrigerant in the gas-liquid two-phase state is efficiently separated into gas and liquid in the receiver 9, so that the gas refrigerant is temporarily accumulated in the upper part of the receiver 9 and the liquid refrigerant is temporarily accumulated in the lower part thereof. .
Therefore, if the refrigeration cycle 7 is filled with a sufficient amount of refrigerant to form a gas-liquid interface in the gas-liquid separation chamber 50, the refrigerant outlet 56 at the bottom of the liquid receiver 9 has a supercooling degree. Only the liquid refrigerant that does not flow into the lower communication chamber 35 of the first header 30. The gas-liquid separation chamber 50 of the receiver 9
The moisture contained in the liquid refrigerant temporarily stored therein is removed by the dryer 52.

The liquid refrigerant flowing into the lower communication chamber 35 is distributed to the plurality of supercooling flat tubes 27 in the lower communication chamber 35. The liquid refrigerant distributed to the plurality of flat tubes for supercooling 27 is used for the flat tubes for supercooling 2
When it passes through 7, it exchanges heat with the outdoor air through the corrugated fins 28 to be supercooled and flows into the lower communication chamber 44 of the second header 40, which serves as a liquid refrigerant having a supercooling degree.

Here, if ventilation of the receiver-integrated refrigerant condenser 3 is poor and sufficient heat cannot be dissipated, the high pressure of the condenser body 8 and the receiver 9 becomes abnormally high. Particularly, the pressure of the refrigerant in the receiver 9 is, for example, 30 kg / cm ² (the refrigerant temperature is, for example, 1
When the temperature rises above 00 ° C. to 105 ° C.), the solder material 61 of the fusible plug 54 is melted and the refrigerant is discharged from the hole 60 to the atmosphere, so that the condenser main body 8 and the liquid receiver 9 are cooled. Prevent trouble.

[Effects of the Embodiment] As described above, in the vehicle refrigeration system 1, the drier 52 for removing the water in the refrigeration cycle 7 is replaced by the liquid receiver 9 or the liquid receiver integrated refrigerant condenser 3.
Since it is possible to replace the dryer 52 by itself without replacing it, it is possible to replace the dryer 52 at a very low cost.

Further, since the liquid receiver 9 is integrated with the condenser body 8, the mountability on the vehicle can be improved and the cost can be reduced by reducing the number of parts. Moreover, since the fusible plug 54 that constitutes the refrigeration cycle 7 seals the lower end side opening portion 62 for taking in and out the dryer 52, the number of parts of the refrigeration cycle 7 as a whole does not increase, and Compared with the technology, the product cost of the vehicle refrigeration system 1 can be significantly reduced. Therefore, the productivity of the vehicle refrigeration system 1 can be improved. Also,
Since the liquid receiver integrated refrigerant condenser 3 can be compactly housed in the engine room of the vehicle, space is saved.

The receiver 9 of this embodiment is composed of a receiver main body 51.
Since the fusible plug 54 is detachably attached to the lower end of the refrigeration cycle 7, when the solder material 61 is melted and the refrigerant is discharged to the atmosphere, the refrigerant is discharged in the downward direction. High safety during the filling work of filling the refrigerant.

Further, in the refrigerating cycle 7 provided with the supercooling section 22, the so-called supercooling cycle, when the fusible plug 54 is provided in the pipe downstream of the supercooler like the conventional refrigerating cycle, the refrigerating cycle 7 is provided. Even if the refrigerant is overfilled with the refrigerant, the temperature of the refrigerant is lowered, so the solder material 61 of the fusible plug 54 does not melt. Best to install.

Further, since the supercooling section 22 is provided on the downstream side of the liquid receiver 9, even if the gas-liquid separation cannot be completely performed in the liquid receiver 9, a plurality of flat tubes 27 for supercooling are provided. When the refrigerant passes through, the bubble-like gas refrigerant completely disappears.
Therefore, the volume of the liquid receiver 9, that is, the cross-sectional area of the liquid receiver 9 can be reduced, and the effective heat dissipation area of the condensation part 21 and the supercooling part 22 of the core 20 can be prevented from being reduced.

[Modification] Although the present invention is applied to the vehicle refrigeration system in this embodiment, the present invention may be applied to a vehicle cooling system, a vehicle refrigeration system, and a vehicle cooling / heating system. Further, the present invention may be applied to a stationary refrigeration system such as a home refrigeration system or a factory refrigeration system.

In this embodiment, the condenser unit 8 is provided in the condenser body 8.
1 and the supercooling unit 22 are provided, the supercooling unit 22 may not be provided. In this embodiment, the condenser body 8 to the liquid receiver 9
Although the refrigerant inlet 55 to the condenser is provided near the lower end of the condenser 21, the refrigerant inlet 55 may be provided near the upper end or the center of the condenser 21. Further, one refrigerant inlet 55 and one refrigerant outlet 56 are provided as the communication ports that communicate the condenser body 8 and the liquid receiver 9, respectively.
Two or more communication ports of either one of the refrigerant outlet port 56 and the refrigerant outlet port 56 may be provided.

Although the fusible plug 54 is used as the sealing means in this embodiment, functional parts such as a pressure switch and a relief valve may be used as the sealing means. When a pressure switch is detachably attached to the lower end of the receiver body 51 instead of the fusible plug 54, the connector of the pressure switch to the vehicle harness faces downward, so Water such as rainwater can be prevented from entering.

Further, no matter what kind of functional component is used as the sealing means (plug), the sealing means is provided at the lower end of the liquid receiver 9, so there is no risk of accidentally opening the sealing means. Even if the fusible plug 54 and the relief valve are not in operation, if the refrigerant leaks from the lower end side opening 62, the safety is relatively high.

A mesh-shaped metal bag may be used as a bag in which a large number of desiccants 57 constituting the dryer 52 are placed. In this case, the fusible plug 54 is fixed to the liquid receiver main body 5 by fixing the metal bag to the fusible plug 54 by means such as welding.
The dryer 52 can be taken out at the same time when the dryer 52 is removed from 1.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a refrigeration cycle of a vehicle refrigeration system to which an embodiment of the present invention is applied.

FIG. 3 is a sectional view showing a main part of an embodiment of the present invention.

[Explanation of symbols]

 1 Vehicle Refrigerator 2 Refrigerant Compressor 3 Receiver Integrated Refrigerant Condenser 4 Sight Glass 5 Expansion Valve 7 Refrigeration Cycle 8 Condenser Main Body 9 Liquid Receiver 20 Core 21 Condensing Part 22 Supercooling Part 51 Liquid Receiver Main Body 52 Dryer 54 Soluble stopper (sealing means, functional component of refrigeration cycle)

Claims (5)

[Claims] 1. A condenser body for condensing and liquefying a refrigerant, (b) a dryer for removing water in a refrigeration cycle, and (c) a condenser body integrally provided with the dryer inside. And a receiver main body having an opening that allows the dryer to be taken in and out, and (d) constitutes a functional component of the refrigeration cycle,
A receiver-integrated refrigerant condenser, comprising: a seal unit detachably attached to the opening to prevent the refrigerant from leaking to the outside from the opening. 2. The liquid receiver integrated refrigerant condenser according to claim 1, wherein the sealing means is a functional component having a function of enhancing the safety of the refrigeration cycle device. Body type refrigerant condenser. 3. The receiver-integrated refrigerant condenser according to claim 2, wherein the functional component melts and releases the refrigerant to the atmosphere when the refrigerant in the receiver main body rises above an abnormal temperature. A liquid receiver integrated refrigerant condenser, which is a fusible plug having a hole in which a melting material is sealed. 4. The liquid receiver integrated refrigerant condenser according to claim 2, wherein the functional component is a pressure switch for detecting an abnormal pressure in the liquid receiver body. Integrated refrigerant condenser. 5. The receiver-integrated refrigerant condenser according to claim 2, wherein the functional component is a relief valve that releases the refrigerant to the atmosphere when the refrigerant in the receiver body rises to an abnormal pressure or higher. A refrigerant condenser integrated with a receiver characterized by being present.