JP3812582B2 - Receiver integrated refrigerant condenser - Google Patents

Description

  The present invention relates to a receiver-integrated refrigerant condenser that is incorporated in a refrigeration cycle such as a vehicle air conditioner, a vehicle refrigeration apparatus, or a vehicle refrigeration apparatus that can vary the amount of refrigerant circulation.

  Conventionally, the liquid receiver and the refrigerant condenser of the refrigeration cycle of the vehicular refrigeration apparatus are arranged separately and independently. For this reason, it is difficult to reduce the number of components, that is, to reduce the cost, and the receiver and the refrigerant condenser occupy the mounting space. Therefore, many liquid receiver integrated refrigerant condensers in which the liquid receiver is integrated with the refrigerant condenser have been proposed for the purpose of reducing the cost and improving the mountability to the vehicle.

Among them, German Patent Application Publication No. 4238853 and Japanese Patent Application Laid-Open No. 4-43271 disclose a dryer in the receiver of the receiver-integrated refrigerant condenser for the purpose of removing moisture in the refrigeration cycle. The inserted technique is disclosed. 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 one, the bolt formed in the opening formed at the end of the liquid receiver is made detachable. The dryer can be taken in and out, and the receiver can be taken in and out by configuring the receiver from a cylindrical receiver body and flange (top cover) and making the flange detachable from the receiver body with screws. A method is disclosed.
German Patent Application Publication No. 4,238,853 JP-A-4-43271 German Patent Application Publication No. 4319293

  However, in the prior art, since closed parts such as bolts and flanges are provided to seal the opening for inserting and removing the dryer, the number of parts increases as a whole in the refrigeration cycle, and the liquid receiving part is used for cost reduction. Even if it was integrated with the condenser and the refrigerant condenser, the effect was not obtained so much.

  As another problem, there has been a problem that the dryer cannot be taken out simultaneously with the removal of the closed parts such as the bolts and flanges from the receiver body.

  An object of the present invention is to provide a receiver-integrated refrigerant condenser in which a blocker such as a bolt or a flange can be removed from a receiver body and a dryer can be taken out at the same time.

  In order to achieve the above object, the present invention provides (a) a condensing portion having a plurality of condensing flat tubes, a supercooling portion having a plurality of subcooling flat tubes, and a cylindrical shape. A header in which the flat tube and the plurality of flat tubes for supercooling communicate with each other; and an intermediate communication chamber in which the upstream side communicates with the plurality of condensing flat tubes and the downstream side communicates with the receiver body. A condenser body having an upstream side communicating with the receiver body and a downstream side partitioning into downstream communication chambers communicating with the plurality of flat tubes for supercooling, and condensing and liquefying the refrigerant; b) a dryer for removing moisture in the refrigeration cycle; (c) a bag for storing the dryer; (d) provided integrally with the condenser main body; A refrigerant inlet that opens at the bottom of the condenser, and a refrigerant outlet that opens below the refrigerant inlet and communicates with the lower communication chamber. A liquid receiver main body, and (e) a sealing means that is detachably attached to the opening to prevent leakage of refrigerant from the opening to the outside, and (f) the sealing means is connected to the liquid receiver main body. A receiver-integrated refrigerant condenser is employed in which the bag for inserting the dryer is fixed to the sealing means so that the dryer can be taken out at the same time as removing the dryer.

  Further, the bag for storing the dryer may be a metal bag, and the metal bag may be fixed to the sealing means by welding or the like.

  According to the present invention, the dryer can be taken out simultaneously with the removal of the sealing means from the receiver body.

  In the embodiment, a condenser main body that condenses and liquefies the refrigerant, a dryer that removes moisture in the refrigeration cycle, and a unit that is integrally provided in the condenser main body, accommodates the dryer inside, and can take in and out the dryer. A liquid receiver body having an opening, and a sealing means (plug) that constitutes a functional component of the refrigeration cycle and that is detachably attached to the opening and prevents leakage of refrigerant from the opening to the outside. Adopted technical means with In the embodiment, the sealing means is a functional component having a function of improving the safety of the refrigeration cycle equipment. In an embodiment, the functional component is a fusible plug having a hole that encloses a dissolving material that melts and releases the refrigerant to the atmosphere when the refrigerant in the receiver body rises above an abnormal temperature. In an embodiment, the functional component is a pressure switch that detects an abnormal pressure in the receiver body. In an embodiment, the functional component is a relief valve that releases the refrigerant to the atmosphere when the refrigerant in the receiver body rises above an abnormal pressure.

  According to the embodiment, since the liquid receiver main body is integrated with the condenser main body, the installation space can be saved and the mountability can be improved. Furthermore, when replacing the dryer accommodated 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 receiver body from the opening, and the opening is sealed by the sealing means constituting the refrigeration cycle. This eliminates the need to replace the receiver body or the receiver-integrated refrigerant condenser when replacing the dryer. Moreover, since the opening part of the receiver body is not sealed with parts that do not constitute the refrigeration cycle, the number of parts in the entire refrigeration cycle is not increased, and cost reduction can be realized. According to the embodiment, troubles in the refrigeration cycle equipment can be prevented beforehand by using a functional component having a function of improving the safety of the refrigeration cycle equipment as the sealing means. According to the embodiment, when the high-pressure side pressure of the refrigeration cycle equipment such as the condenser main body and the receiver main body becomes abnormally high, the dissolved material enclosed in the hole of the fusible plug dissolves and the refrigerant is discharged into the atmosphere. By discharging to refrigeration, troubles in the refrigeration cycle equipment can be prevented. According to the embodiment, the pressure switch stops the operation of the refrigeration cycle when the high-pressure side pressure of the refrigeration cycle equipment such as the condenser main body or the receiver main body becomes abnormally high or abnormally low. By giving an instruction to, troubles in the refrigeration cycle equipment can be prevented. According to the embodiment, when the high-pressure side pressure of the refrigeration cycle equipment such as the condenser main body and the receiver main body becomes abnormally high, the relief valve is opened to release the refrigerant to the atmosphere, whereby the refrigeration cycle Device troubles can be prevented.

[Basic Configuration of Examples]
Next, a receiver-integrated refrigerant condenser according to the present invention will be described based on an embodiment shown in the drawings. First, the basic configuration will be described. FIG. 1 is a view showing a liquid receiver-integrated refrigerant condenser, and FIG. 2 is a view showing a refrigeration cycle of a vehicular refrigeration apparatus.

  The vehicular refrigeration apparatus 1 includes a refrigerant cycle 2, a receiver-integrated refrigerant condenser 3, a sight glass 4, an expansion valve 5, a refrigerant evaporator 6, and a receiver cycle (hereinafter referred to as refrigeration) from a refrigerant pipe or the like that connects these in an annular shape. 7).

  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. The refrigerant compressor 2 is a compressor that compresses the gas refrigerant sucked in from the suction port and discharges the high-temperature and high-pressure gas refrigerant from the discharge port when the rotational power of the engine 11 is transmitted.

  As shown in FIG. 2, the sight glass 4 is connected to the downstream side of the receiver-integrated refrigerant condenser 3 and observes the state of the refrigerant circulating in the refrigeration cycle 7. This sight glass 4 is installed alone in the middle of the liquid refrigerant pipe constituting the refrigerant pipe adjacent to the liquid receiver-integrated refrigerant condenser 3, for example, in a place where the inspector can easily see in the engine room of the vehicle. Has been.

  The sight glass 4 was fitted into a tubular sight glass body 14 whose both ends were connected by means of welding or fastening in the middle of the liquid refrigerant pipe, and a viewing window 15 formed on the upper surface of the sight glass body 14. It is comprised from the welding glass 16 grade | etc.,. In general, when bubbles are seen from the viewing window 15, the refrigerant is insufficient, and when no bubbles are seen, the amount of refrigerant is an appropriate amount. Further, a strainer (filter) that captures foreign matters such as dust and metal powder in the refrigeration cycle 7 is inserted in the liquid refrigerant pipes around the sight glass 4.

  The expansion valve 5 is a decompression device that adiabatically expands by injecting a high-temperature and high-pressure liquid refrigerant from a small throttle hole to form a low-temperature and low-pressure mist refrigerant (a gas-liquid two-phase refrigerant). A temperature-operated expansion valve that automatically adjusts the valve opening so as to maintain the refrigerant superheat degree on the outlet side of the evaporator 6 at a predetermined value is used.

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

  Next, the receiver-integrated refrigerant condenser 3 having this basic configuration will be described in detail with reference to FIGS. The receiver-integrated refrigerant condenser 3 has a height of 300 mm to 400 mm and a width of 300 mm to 600 mm, for example, and is installed in a place where it can easily receive traveling wind in the engine room of the vehicle. This is a heat exchanger in which the vessel 9 is integrated.

  The condenser body 8 includes a core 20 that performs heat exchange, a first header 30 that is disposed on one end of the core 20 in the horizontal direction, a second header 40 that is disposed on the other end of the core 20 in the horizontal direction, and the like. These heat exchangers are manufactured by brazing together with a liquid receiver 9 in a furnace.

  The core 20 includes a condensing part 21 and a supercooling part 22, and side plates 23 and 24 for fixing mounting brackets (not shown) for attaching the receiver-integrated refrigerant condenser 3 to the vehicle at upper and lower ends, respectively. It is joined by means such as brazing.

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

  The supercooling unit 22 is disposed below the condensing unit 21, and heat-exchanges the liquid refrigerant flowing in from the receiver 9 with the outdoor air sent by a cooling fan (not shown) or the like to supercool the refrigerant. Work as a super cooler. The supercooling section 22 includes a plurality of supercooling flat tubes 27 and corrugated fins 28, which are joined together by means such as brazing.

  The plurality of condensing flat tubes 25 and the plurality of subcooling flat tubes 27 are arranged in parallel with a predetermined gap in the horizontal direction. Further, the plurality of condensing flat tubes 25 and the plurality of subcooling flat tubes 27 are made of aluminum or an aluminum alloy having excellent corrosion resistance and thermal conductivity, and are formed into an oval shape having a flat cross-sectional shape by extrusion. And has a plurality of refrigerant channels therein.

  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. A clad metal plate is pressed into a corrugated shape.

  The refrigerant flowing in the upper half of the plurality of condensing flat tubes 25 flows from the first header 30 to the second header 40, and the refrigerant flowing in the lower half of the plural condensing flat tubes 25 is transferred from the second header 40 to the first header. The refrigerant flowing through the subcooling flat tubes 27 flows to the second header 40 from the first header 30. In this basic configuration, the number of condensing flat tubes 25 is greater than the number of subcooling flat tubes 27. According to experimental experience, the number of subcooling flat tubes 27 is the entire core 20. 15% to 20% of is desirable.

  The first header 30 includes a header plate 31 having a substantially U-shaped cross section and a tank plate 32 having a semicircular 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 a predetermined shape is obtained by pressing a metal plate clad with a brazing material on both sides. .

  In the first header 30, a separator (partition plate) 36 that divides the interior into an upper communication chamber 33 and an intermediate communication chamber 34, and a separator (partition) that divides the interior into an intermediate communication chamber 34 and a lower communication chamber 35. Plate) 37 is provided.

  In the upper communication chamber 33, the upstream side communicates with the inlet pipe 38, and the downstream side communicates with the refrigerant passage of the condensing flat tube 25 in the upper half. The intermediate communication chamber 34 communicates with the refrigerant passage of the condensing flat tube 25 in the lower half on the upstream side and communicates with the interior of the liquid receiver 9 on the downstream side. Further, the lower communication chamber 35 communicates with the refrigerant passages of the plurality of flat tubes 27 for supercooling on the upstream side and communicates with the refrigerant passages of the plurality of flat tubes 27 for supercooling on the downstream side. 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 includes a header plate 41 having a substantially U-shaped cross section and a tank plate 42 having a semicircular arc in 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 a predetermined shape is obtained by pressing a metal plate clad with brazing material on both sides. .

  In the second header 40, a separator (partition plate) 45 that divides the interior into an upper communication chamber 43 and a lower communication chamber 44 is provided. The upper communication chamber 43 communicates with the refrigerant passage of the condensing flat tube 25 in the upper half on the upstream side, and communicates with the refrigerant passage of the condensing flat tube 25 on the lower half on the upstream side. Further, the lower communication chamber 44 communicates with the refrigerant passages of the plurality of supercooling flat tubes 27 on the upstream side and communicates with the outlet pipe 46 on the downstream side. The outlet pipe 46 is a pipe that sends out the liquid refrigerant in the lower communication chamber 44 to the sight glass 4.

  The liquid receiver 9 is a receiver that temporarily stores the refrigerant so that the refrigerant liquefied by the condenser body 8 can be supplied to the refrigerant evaporator 6 in response to the refrigeration load. The liquid receiver 9 gas-liquid separates the gas-liquid two-phase refrigerant that has flowed into the interior from the condensing unit 21 into a gas refrigerant and a liquid refrigerant, and supplies only the liquid refrigerant to the supercooling unit 22.

  The liquid receiver 9 includes a liquid receiver body 51 in which a gas-liquid separation chamber 50 is formed, a dryer 52 detachably accommodated in the liquid receiver body 51, and an upper end side of the liquid receiver body 51. It comprises a cap 53 that closes the opening, a fusible plug 54 that closes the lower end opening of the liquid receiver body 51, and the like.

  The liquid receiver main body 51 is made of aluminum or aluminum alloy having excellent corrosion resistance, and is formed into a cylindrical shape by pressing a metal plate clad with a brazing material on one side. The liquid receiver body 51 is open at both ends in the cylindrical 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 pieces 39. The liquid receiver main body 51 is formed with a refrigerant inlet 55 and a refrigerant outlet 56 at a joint portion with the tank plate 32.

  The refrigerant inflow port 55 opens at the lower part of the intermediate communication chamber 34 of the first header 30 (lower part of the condensing part 21), and is a communication port through which the refrigerant in the intermediate communication chamber 34 flows into the gas-liquid separation chamber 50. is there. 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. In this basic configuration, the liquid receiver body 51 and the tank plate 32 of the first header 30 are formed separately, but the liquid receiver body 51 and the tank plate 32 of the first header 30 are integrated. It may be molded.

  The dryer 52 uses a large number of Freon refrigerant desiccants (hereinafter abbreviated as desiccants) 57 such as silica-alumina adsorbents such as synthetic zeolite, alumina gel, and silica gel. If foreign matter such as dust or metal powder is present in the refrigeration cycle 7, it will be caught by the throttle hole of the expansion valve 5 or the valve mechanism of the refrigerant compressor 2, or its operation may be hindered, or the sliding part such as piston or bearing There is a high risk of burning. In addition, when the desiccant 57 is disintegrated while being used for a long period of time or is worn and pulverized and flows into the refrigeration cycle 7, the fine powder of the desiccant 57 also causes trouble in the refrigeration cycle equipment. give. Therefore, in this example, a large number of desiccants 57 are placed in a filter bag 58 that serves as a filter for reducing the fine powder. In addition, you may put many desiccants 57 in the bag made from felt (waterproof heavy paper).

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

  The bolt-shaped main body 59 is fixed by being screwed into a cylindrical body 63 that forms the lower end side opening 62 of the liquid receiver main body 51. Further, an O-ring 64 as a sealing material for preventing the refrigerant from leaking to the outside is mounted between the outer periphery of the bolt-shaped main body 59 and the inner periphery of the cylindrical body 63. The cylinder 63 is formed in a cylindrical shape by cutting a metal block, and is joined to the lower end portion of the liquid receiver body 51 by means such as brazing.

[How to replace the dryer]
Next, a method for replacing the dryer having this basic configuration will be briefly described with reference to FIGS.

  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. If it becomes like this, it may freeze at the throttle hole of the expansion valve 5 to obstruct the flow of the refrigerant or corrode the refrigeration cycle equipment.

  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. In this basic configuration, when replacing the old dryer 52, the fusible stopper 54 is removed from the lower end of the receiver body 51 using a tool, and the dryer 52 older than the lower end opening 62 is removed. After taking it out of 51, a new dryer 52 is inserted into the receiver body 51 through the lower end opening 62.

  Then, a fusible plug 54 having an O-ring 64 mounted on the outer periphery of the bolt-shaped main body 59 is screwed into a cylindrical body 63 provided at the lower end of the liquid receiver main body 51 by using a tool to seal the lower end side opening 62. Do. Therefore, the replacement of the dryer 52 can be performed by replacing only the dryer 52 without exchanging the liquid receiver 9 or the liquid receiver-integrated refrigerant condenser 3, so that the replacement work of the dryer 52 is extremely inexpensive. Become. Further, since the dryer 52 can be replaced without replacing the fusible plug 54, it is not an uneconomical exchanging operation to replace the fusible plug 54 that can operate normally.

  Next, the operation of the vehicle refrigeration apparatus 1 having the basic configuration will be briefly described with reference to FIGS. 1 to 3.

  When the operation of the vehicle refrigeration apparatus 1 is started, the electromagnetic clutch 13 is energized, and the refrigerant compressor 2 is rotationally driven by the engine 11 via the belt 12 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 that has flowed into the upper communication chamber 33 is distributed to the upper half of the condensing flat tube 25 group in the upper communication chamber 33.

  The gas refrigerant distributed to the condensing flat tubes 25 in the upper half is condensed and liquefied by exchanging heat with outdoor air via the corrugated fins 26 when passing through the condensing flat tubes 25. It becomes a two-phase refrigerant and flows into the upper communication chamber 43 of the second header 40. The gas-liquid two-phase refrigerant that has flowed into the upper communication chamber 43 is distributed to the lower half of the condensing flat tube 25 group in the upper communication chamber 43.

  The gas refrigerant distributed to the condensing flat tubes 25 in the lower half is condensed and liquefied by exchanging heat with outdoor air via the corrugated fins 26 when passing through the condensing flat tubes 25. Most of the refrigerant becomes liquid refrigerant. The refrigerant in the gas-liquid two-phase state flows into the intermediate communication chamber 34 of the first header 30 from the lower half condensing flat tube 25 group. The gas-liquid two-phase refrigerant flowing into the intermediate communication chamber 34 is once collected and then flows into the gas-liquid separation chamber 50 of the liquid receiver 9 through the refrigerant inlet 55. In the liquid receiver 9, the cross-sectional area is increased to a certain extent (for example, 500 mm 2) to reduce the speed of the refrigerant and use the buoyancy of the bubble-shaped gas refrigerant.

  The separator 37 causes the refrigerant flowing into the intermediate communication chamber 34 of the first header 30 from the plurality of condensing flat tubes 25 to U-turn and flow out to the plurality of supercooling flat tubes 27. The gas-liquid two-phase refrigerant is gas-liquid separated by centrifugal force and collected in one place (inner side) from the bubble-like gas refrigerant.

  That is, since the refrigerant inlet 55 is opened at the lower part of the intermediate communication chamber 34 and the refrigerant inlet 55 and the refrigerant outlet 56 are relatively close to each other, the gas-liquid two-phase refrigerant is transferred to the refrigerant inlet. 55-> Gas-liquid separation chamber 50-> When passing through the refrigerant outlet 56, the liquid refrigerant having a large specific gravity is transferred to the outer portion of the gas-liquid separation chamber 50 by receiving a centrifugal force, and a bubble-shaped gas refrigerant having a small specific gravity. Gather in the inner part.

  Therefore, since the gas-liquid two-phase refrigerant is efficiently gas-liquid separated in the liquid receiver 9, the gas refrigerant is temporarily stored in the upper part of the liquid receiver 9 and the liquid refrigerant is temporarily stored in the lower part. Therefore, if the refrigerant is filled in the refrigeration cycle 7 with sufficient gas-liquid interface in the gas-liquid separation chamber 50, the refrigerant outlet 56 at the lower part of the liquid receiver 9 has a degree of supercooling. Only the non-liquid refrigerant flows into the lower communication chamber 35 of the first header 30. Note that the liquid refrigerant temporarily stored in the gas-liquid separation chamber 50 of the liquid receiver 9 is removed from the liquid refrigerant by the dryer 52.

  The liquid refrigerant that has flowed into the lower communication chamber 35 is distributed to the plurality of flat tubes 27 for supercooling in the lower communication chamber 35. The liquid refrigerant distributed to the plurality of flat tubes for supercooling 27 is supercooled by exchanging heat with outdoor air via the corrugated fins 28 when passing through the flat tubes for supercooling 27, and the degree of supercooling is increased. The liquid refrigerant flows into the lower communication chamber 44 of the second header 40.

  Here, if the ventilation of the liquid receiver-integrated refrigerant condenser 3 is poor and sufficient heat cannot be dissipated, the high-pressure pressure of the condenser main body 8, the liquid receiver 9, etc. becomes abnormally high. In particular, when the refrigerant pressure in the liquid receiver 9 rises to, for example, 30 kg / cm ^ 2 (refrigerant temperature is, for example, 100 ° C. to 105 ° C.) or more, the solder material 61 of the fusible plug 54 dissolves and the refrigerant is discharged from the hole 60 To prevent troubles in the refrigeration cycle equipment such as the condenser main body 8 and the liquid receiver 9.

  As described above, in the vehicular refrigeration apparatus 1, the dryer 52 that removes moisture in the refrigeration cycle 7 can be replaced by the dryer 52 alone without replacing the liquid receiver 9 and the liquid receiver-integrated refrigerant condenser 3. Therefore, the replacement work of the dryer 52 can be performed at a very low cost.

  Moreover, since the receiver 9 is integrated with the condenser main body 8, the mounting property to a vehicle can be improved and the cost can be reduced by reducing the number of parts. In addition, since the lower end side opening 62 for taking in and out of the dryer 52 is sealed by the fusible plug 54 constituting the refrigeration cycle 7, there is no increase in the number of parts of the refrigeration cycle 7 as a whole. Compared with the technology, the product cost of the vehicular refrigeration apparatus 1 can be greatly reduced. Therefore, the productivity of the vehicle refrigeration apparatus 1 can be improved. In addition, since the liquid receiver-integrated refrigerant condenser 3 can be stored compactly in the engine room of the vehicle, space is saved.

  Since the liquid receiver 9 of this basic configuration has a fusible plug 54 detachably attached to the lower end of the liquid receiver body 51, when the solder material 61 is melted and the refrigerant is released to the atmosphere, Since the discharge direction of the refrigerant is downward, the safety is high particularly during the filling operation of filling the refrigerant in the refrigeration cycle 7.

  Further, in the refrigeration cycle 7 provided with the supercooling section 22, that is, a so-called supercooling cycle, if a fusible plug 54 is provided in a pipe downstream of the supercooler as in a conventional refrigeration cycle, a refrigerant is introduced into the refrigeration cycle 7. Even if it is overfilled, the temperature of the refrigerant decreases, so the solder material 61 of the fusible plug 54 does not melt, but the fusible plug 54 is attached to the liquid receiver 9 in the saturated region as in this basic configuration. Is the best.

  In addition, since the supercooling unit 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, the refrigerant is connected to the plurality of flat tubes 27 for supercooling. When passing through, the bubble gas refrigerant completely disappears. For this reason, 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 radiation area of the condensing part 21 and the supercooling part 22 of the core 20 can be prevented from being reduced.

[Configuration of Example]
An embodiment to which the present invention is applied will be described.

  A mesh-shaped metal bag is used as a bag for storing a large number of desiccants 57 constituting the dryer 52. In this case, 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 that the fusible plug 54 is removed from the receiver body 51.

  In this embodiment, the present invention is applied to a vehicle refrigeration apparatus. However, the present invention may be applied to a vehicle cooling apparatus, a vehicle refrigeration apparatus, and a vehicle air conditioning apparatus. In addition, the present invention may be applied to stationary refrigeration apparatuses such as household refrigeration apparatuses and factory refrigeration apparatuses.

  In this embodiment, the refrigerant inlet 55 from the condenser main body 8 to the liquid receiver 9 is provided in the vicinity of the lower end portion of the condensing part 21, but the refrigerant inlet 55 is provided in the vicinity of the upper end part or the central part of the condensing part 21. May be. Further, one refrigerant inlet 55 and one refrigerant outlet 56 are provided as communication ports for communicating the condenser main body 8 and the liquid receiver 9, but either one of the refrigerant inlet 55 and the refrigerant outlet 56 is provided. Two or more communication ports may be provided.

  In this embodiment, the fusible plug 54 is used as the sealing means, but 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 in place of the fusible plug 54, the connector of the pressure switch with the vehicle harness faces downward. Invasion of moisture such as rainwater can be reduced.

  In addition, no matter what 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 opening the sealing means by mistake and it is temporarily soluble. Even when the refrigerant leaks from the lower end side opening 62 in a state where the stopper 54 and the relief valve are not operated, the safety is relatively high.

It is the front view which showed the Example of this invention. It is the block diagram which showed the refrigerating cycle of the refrigeration apparatus for vehicles to which the Example of this invention is applied. It is sectional drawing which showed the principal part of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigeration apparatus for vehicles 2 Refrigerant compressor 3 Receiver integrated refrigerant condenser 4 Sight glass 5 Expansion valve 7 Refrigeration cycle 8 Condenser main body 9 Receiver 20 Core 21 Condensing part 22 Subcooling part 51 Receiver main part 52 Dryer 54 fusible stopper (sealing means, refrigeration cycle functional parts)

Claims (2)

(A) a condensing part having a plurality of condensing flat tubes;
A supercooling section having a plurality of flat tubes for supercooling;
A header having a cylindrical shape, and the plurality of condensing flat tubes and the plurality of subcooling flat tubes communicating with each other;
An intermediate communication chamber in which the upstream side communicates with the plurality of condensing flat tubes and the downstream side communicates with the receiver body, and the upstream side communicates with the receiver body in the header. A separator body having a downstream compartment communicating with the cooling flat tube, and a condenser main body for condensing and liquefying the refrigerant;
(B) a dryer for removing moisture in the refrigeration cycle;
(C) a bag for the dryer;
(D) Refrigerant integrally provided in the condenser main body, having an opening in which the dryer is accommodated in the bag and capable of taking the dryer in and out of the bag, and is opened at a lower portion of the condenser. A liquid receiver body having an inlet, and a refrigerant outlet that opens below the refrigerant inlet and communicates with the lower communication chamber;
(E) a sealing means that is detachably attached to the opening and prevents leakage of refrigerant from the opening to the outside;
(F) A receiver integrated type, wherein the bag for inserting the dryer is fixed to the sealing means so that the dryer can be taken out at the same time that the sealing means is removed from the receiver body. Refrigerant condenser. The receiver-integrated refrigerant condenser according to claim 1,
The bag containing the dryer is a metal bag,
A receiver-integrated refrigerant condenser, wherein the metal bag is fixed to the sealing means by welding or the like.

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