JP2010126026A - Vehicular air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air-conditioner having an excellent cooling performance in a cabin when the inside of the cabin must be preferentially cooled, and having enhanced cold storage efficiency. <P>SOLUTION: The vehicular air-conditioner 1 has: a refrigerant circulation path 2 comprising a compressor 3, a condenser 4 for cooling a refrigerant discharged from the compressor 3, an expansion valve 5 for decompressing the refrigerant passing through the condenser 4, and an evaporator 6 for evaporating the decompressed refrigerant; and a brine circulation path 7 comprising a cold storing apparatus 8 enclosing cold storing material, a brine container 9 in which the cold storing apparatus 8 is incorporated, and a brine 11 to cool a cold storing material in the cold storing apparatus 8, and receive cold heat from the cooled cold storing material is stored, a cold receiving/releasing apparatus 12 which is arranged on the downstream side of the air blowing direction of the evaporator 6 with the brine 11 flowing therein, and a pump 13 for circulating the brine 11 between the brine container 11 and the cold receiving/releasing apparatus 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner used for a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped, for example.

  In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.

  By the way, a normal vehicle having a refrigerant circulation path including a compressor, a refrigerant cooler that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the refrigerant cooler, and an evaporator that evaporates the decompressed refrigerant. In the air conditioner for air conditioning, when the engine is stopped, the compressor using the engine as a driving source stops, so that the refrigerant is not supplied to the evaporator, and the cooling capacity is abruptly lowered.

  Therefore, as a vehicle air conditioner that has solved these problems, a compressor, a refrigerant cooler that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the refrigerant cooler, and the decompressed refrigerant are evaporated. A refrigerant circulation path having an evaporator to be used and a regenerator that is disposed below the evaporator in the ventilation direction and in which a regenerator material is enclosed is known (see Patent Document 1).

  According to the vehicle air conditioner described in Patent Document 1, when the compressor is operated by the engine, the cool storage material in the regenerator is cooled by the cold air that has passed through the evaporator, and the vehicle interior is cooled. It has become. When the engine is stopped and the compressor is stopped, the cold heat of the regenerator material in the regenerator is transmitted to the wind passing through the evaporator and the regenerator, and the wind is cooled. The room is to be cooled.

  However, according to the vehicle air conditioner described in Patent Document 1, when cooling the regenerator material in the regenerator, since the cold heat of the wind that has passed through the evaporator is taken away, it is necessary to preferentially cool the vehicle interior. In this case, there is a problem that the cooling performance in the passenger compartment is insufficient. For example, when the driver gets in and starts running after the vehicle is parked under hot weather, the compressor of the vehicle air conditioner is operated to rapidly cool the passenger compartment by the wind that passes through the evaporator and is cooled by the refrigerant. However, in this case as well, until the necessary amount of cold energy is stored in the regenerator material, the cold energy of the wind that has passed through the evaporator is taken away by the regenerator material in the regenerator, so the cooling performance in the passenger compartment Decreases.

In addition, since the regenerator in which the regenerator material is enclosed is arranged on the downstream side in the ventilation direction of the evaporator, the size of the regenerator is limited by the size of the ventilation duct in which the evaporator is arranged, The amount of the regenerator material enclosed in the regenerator is also limited. Therefore, there is a problem that the amount of cold heat stored in the cold storage material is also limited, and the cold storage efficiency is lowered.
Japanese Patent No. 3899993

  An object of the present invention is to provide a vehicle air conditioner that solves the above-described problems and has excellent cooling performance in the vehicle interior when the vehicle interior needs to be preferentially cooled, and has improved cold storage efficiency. is there.

  In order to achieve the above object, the present invention comprises the following aspects.

  1) a refrigerant, a refrigerant cooler that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the refrigerant cooler, and a refrigerant circulation path that includes an evaporator that evaporates the decompressed refrigerant; The enclosed regenerator, the regenerator, and the brine container in which the brine that cools the regenerator material in the regenerator and receives cold heat from the cooled regenerator material is disposed downstream of the evaporator in the ventilation direction, A vehicle air conditioner comprising: a cooling / receiving cooler through which brine flows, and a brine circulation path having a pump for circulating the brine between the brine container and the receiving / cooling device.

  2) The evaporator is provided with a plurality of heat exchange pipe parts arranged at intervals, and the receiver / discharger is provided with a plurality of brine circulation pipe parts arranged at intervals, The vehicle air conditioner according to 1), wherein the fins arranged between the heat exchange pipe parts and the fins arranged between the adjacent brine circulation pipe parts of the cooler / receiver are shared.

  3) An evaporator is disposed with a pair of header tanks spaced apart from each other and between the header tanks spaced apart in the length direction of the header tank, and both ends are connected to both header tanks. A pair of header tanks spaced apart from each other, and between the header tanks, an evaporator heat exchange pipe in the length direction of the header tank. A plurality of brine circulation pipes arranged at the same interval and having both end portions connected to both header tanks, and fins between adjacent heat exchange pipes of the evaporator, and cooling and receiving The vehicle air conditioner according to 1) or 2) above, wherein the vehicle air conditioner is disposed so as to straddle between adjacent brine circulation pipes of the cooler and is joined to a heat exchange pipe of the evaporator and a brine circulation pipe of the receiving and discharging cooler.

  According to the vehicle air conditioner of 1) above, when it is necessary to preferentially cool the passenger compartment, for example, when a vehicle parked under hot weather starts running, the compressor for storing the refrigerant circulation path is installed. While operating, the pump of a brine circulation path is stopped, and a vehicle interior can be cooled with the cold wind which passed the evaporator, without cooling a cool storage material. Therefore, the cooling performance in the vehicle interior when the vehicle interior needs to be preferentially cooled becomes excellent.

  Further, when the temperature in the passenger compartment decreases, the cooling capacity required by the evaporator may be lowered, so that the brine is circulated between the brine container and the receiving and discharging cooler by operating the pump of the brine circulation path. Then, the brine that passes through the cooler / receiver is cooled by the cold air that has passed through the evaporator, and the cooled brine cools the regenerator material in the regenerator of the brine container, so that cold energy is stored in the regenerator material. When a predetermined amount of cold energy is stored in the cold storage material, the pump is stopped. And since it becomes possible to arrange the brine container outside the ventilation duct, it becomes possible to set the size of the brine container and the regenerator relatively freely, and the amount of the regenerator material used is patented. It can be increased compared with the vehicle air conditioner described in Document 1, and as a result, the cold storage efficiency is improved.

  Furthermore, when the engine of the vehicle is stopped and the compressor is stopped, if the pump of the brine circulation path is continuously operated, the cold heat of the regenerator material in the regenerator is transmitted to the brine in the brine container and cooled. When the brine passes through the cooler, the cold heat of the brine is transferred to the wind passing through the cooler. Therefore, even if the temperature of the wind that has passed through the evaporator rises, the wind is cooled by the receiving and discharging cooler, so that a rapid decrease in the cooling capacity is prevented.

  According to the vehicle air conditioner of 2) above, the evaporator includes a plurality of heat exchange pipe portions arranged at intervals, and the receiver / discharger includes a plurality of brines arranged at intervals. It has a circulation pipe part, and the fins arranged between the heat exchange pipe parts of the evaporator and the fins arranged between the adjacent brine circulation pipe parts of the cooler / receiver are shared. Therefore, the brine passing through the receiving / releasing cooler is cooled by the cold heat transmitted from the refrigerant flowing through the heat exchange pipe of the evaporator via the fins, and the brine can be efficiently cooled.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 to 3) is the front side, and the opposite side is the rear side. (Up and down, left and right) are called up and down and left and right.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  FIG. 1 shows the overall configuration of a vehicle air conditioner according to the present invention, and FIGS. 2 and 3 show an evaporator and a receiving and discharging cooler.

  In FIG. 1, a vehicle air conditioner (1) includes a compressor (3) driven by a vehicle engine, a condenser (4) (coolant cooler) for cooling refrigerant discharged from the compressor (3), a condenser ( 4) An expansion valve (5) (decompressor) that depressurizes the refrigerant that has passed through, and a refrigerant circulation path (2) that includes an evaporator (6) that evaporates the depressurized refrigerant, and a regenerator (not shown) enclosed The regenerator (8), the regenerator (8) built-in, and the brine (11) that receives the cold heat from the cooled regenerator while cooling the regenerator material in the regenerator (8) A container (9), a receiver-receiver cooler (12) disposed downstream of the evaporator (6) in the ventilation direction and through which the brine (11) flows, and a brine container (9) and a receiver-receiver cooler (12) And a brine circulation path (7) having an electric pump (13) for circulating the brine (11) between them. Here, a chlorofluorocarbon refrigerant is circulated in the refrigerant circulation path (2).

  As the regenerator material enclosed in the regenerator (8) of the brine circulation path (7), it is preferable to use a glycol compound having a freezing point adjusted to about 8 ° C. Further, as the brine (11), it is preferable to use, for example, a mixture of water and ethylene glycol.

  As shown in FIGS. 2 and 3, the evaporator (6) of the refrigerant circulation path (2) includes an aluminum first header tank (20) and an aluminum first Two header tanks (21), and two front and rear heat exchange pipe rows (22A) (22B) provided between the header tanks (20), (21) in the front-rear direction are provided.

  The first header tank (20) is integrated with the refrigerant inlet header portion (23) located on the front side (downstream side in the ventilation direction) and the refrigerant inlet header portion (23) located on the rear side (upstream side in the ventilation direction). And a refrigerant outlet header portion (24). A refrigerant inlet (25) is provided at the right end of the refrigerant inlet header (23), and a refrigerant outlet (26) is provided at the right end of the refrigerant outlet header (24). The second header tank (21) includes a first intermediate header portion (27) located on the front side and a second intermediate header portion (28) located on the rear side and integrated with the first intermediate header portion (27). And. The right end portion of the second header tank (21) is joined to a communication member (29) that serves as a communication path through which the inside passes through the first intermediate header portion (27) and the second intermediate header portion (28). Yes.

  The front heat exchange tube row (22A) is arranged in the width direction between the refrigerant inlet header portion (23) of the first header tank (20) and the first intermediate header portion (27) of the second header tank (21). A plurality of flat aluminum heat exchange pipes (31) (heats) with the upper and lower ends being spaced apart in the left and right directions and brazed at both upper and lower header tanks (20) and (21) Exchange pipe part). The rear heat exchange tube row (22B) has a width between the refrigerant outlet header portion (24) of the first header tank (20) and the second intermediate header portion (28) of the second header tank (21). A plurality of flat aluminum heat exchange pipes (31) (31) (with the upper and lower header tanks (20) and (21) brazed to the front and rear directions and spaced apart in the left and right directions) Heat exchange pipe part). The heat exchange tubes (31) of both the heat exchange tube rows (22A) (22B) are in the same position in the left-right direction.

  The cooling / receiving cooler (12) of the brine circulation path (7) includes an aluminum first header tank (32) and an aluminum second header tank (33) extending in the left-right direction and spaced apart in the vertical direction. And a row of brine circulation pipes (34) provided in both header tanks (32) and (33). A brine inlet (35) through which brine (11) flows is provided at one end of the first header tank (32), and the brine (11) is provided at one end of the second header tank (33) from the inside. A brine outlet (36) is provided for draining water. The brine distribution pipe row (34) is disposed between the first header tank (32) and the second header tank (33) with the width direction directed in the front-rear direction and spaced in the left-right direction. The section is composed of a plurality of aluminum flat brine circulation pipes (37) (brine circulation pipe sections) brazed to the upper and lower header tanks (32) and (33).

  The interval between the heat exchange pipes (31) adjacent to each other in the left-right direction of each heat exchange pipe row (22A) (22B) of the evaporator (6), and the left and right sides of the brine circulation pipe row (34) of the cooler (12) The interval between the brine circulation pipes (37) adjacent in the direction is equal. Then, heat between the heat exchange tubes (31) adjacent to each other in the left-right direction of each heat exchange tube row (22A) (22B) of the evaporator (6) and between the left and right ends of each heat exchange tube row (22A) (22B). Outside of the exchange pipe (31) and between the brine circulation pipes (37) adjacent to each other in the left-right direction of the brine circulation pipe row (34) of the cooler / receiver (12) and both left and right ends of the brine circulation pipe row (34) Aluminum brine corrugated fins (38) on the outside of the brine distribution pipe (37) are arranged so as to straddle the evaporator (6) and the receiving and discharging cooler (12), respectively, and heat exchange pipes (31) (37) It is brazed. That is, the corrugated fin (38) is connected to the brine circulation pipe line (34) of the cooler / receiver (12) from the rear edge of the heat exchange pipe (31) of the rear heat exchange pipe row (22B) of the evaporator (6). ) To the front edge of the brine distribution pipe (37). In addition, aluminum side plates (39) are placed outside the corrugated fins (38) at the left and right ends so as to straddle the evaporator (6) and the cooler / receiver (12). It is attached.

  The brine (11) is cooled air that has passed through the evaporator (6) while flowing in the brine circulation pipe (37) of the cooler / receiver (12) when the compressor (3) and the electric pump (13) are operated. From the refrigerant flowing in the heat exchange pipe (31) of the evaporator (6) through the corrugated fin (38). Further, the brine (11) is provided with a ventilation gap between adjacent heat exchange pipes (31) of the evaporator (6), and cooling / reception when the compressor (3) is stopped and the electric pump (13) is operated. Cold heat is released to the air passing through the ventilation gap between adjacent brine circulation pipes (37) of the vessel (12).

  In the vehicle air conditioner (1) described above, when it is necessary to preferentially cool the passenger compartment, such as when a vehicle parked under hot weather starts running, the compressor of the refrigerant circulation path (2) ( 3) is activated and the electric pump (13) in the brine circulation path (7) is stopped. Then, the low-pressure gas-liquid mixed phase two-phase refrigerant that has passed through the compressor (3), the condenser (4), and the expansion valve (5) passes through the refrigerant inlet (25), and the refrigerant inlet header of the first header tank (20). Enter the part (23). The refrigerant that has entered the refrigerant inlet header portion (23) flows to the left, is divided, and flows into the heat exchange pipe (31) of the front heat exchange pipe row (22A). The refrigerant flowing into the heat exchange pipe (31) flows downward through the heat exchange pipe (31) and enters the first intermediate header portion (27) of the second header tank (21). The refrigerant that has entered the first intermediate header portion (27) flows to the right, passes through the communication passage in the communication member (29), and enters the second intermediate header portion (28). The refrigerant that has entered the second intermediate header section (28) is divided and flows into the heat exchange pipe (31) of the rear heat exchange pipe row (22B). The refrigerant flowing into the heat exchange pipe (31) flows upward in the heat exchange pipe (31) and enters the refrigerant outlet header portion (24) of the first header tank (20). The refrigerant that has entered the refrigerant outlet header portion (24) flows to the right in the refrigerant outlet header portion (24), and flows out through the refrigerant outlet (26). While the refrigerant flows in the heat exchange pipe (31) of the front heat exchange pipe row (22A) and in the heat exchange pipe (31) of the rear heat exchange pipe row (22B), adjacent heat exchange pipes ( 31) Heat exchange is performed with the air (see arrows X in FIGS. 1 to 3) passing through the ventilation gap between the two, and the refrigerant flows out as a gas phase.

  Therefore, the cool air that has passed through the evaporator (6) can cool the passenger compartment without cooling the regenerator material, and the cooling performance in the passenger compartment is excellent. At this time, the brine (11) accumulated in the receiver / cooler (12) is also cooled by the air that has passed through the evaporator (6), but the brine (11) accumulated in the receiver / cooler (12) is also cooled. Since the amount is small, there is no practical problem with the decrease in cooling capacity due to the evaporator (6).

  When the passenger compartment temperature decreases to a predetermined temperature, the cooling capacity required for the evaporator (6) in the refrigerant circulation path (2) decreases, so the electric pump (13) is operated to turn on the receiving and discharging cooler (12) and the brine. The brine (11) is circulated between the container (9) and the cooling power of the evaporator (6) is used to cool the brine (11) from the cooling air that has passed through the evaporator (6). Then, cold heat is applied to the brine (11) through the corrugated fins (38) from the low-temperature refrigerant flowing in the heat exchange pipe (31) of the evaporator (6). Then, the regenerator material in the regenerator (8) built in the brine container (9) is cooled and solidified by the brine (11) flowing in the brine container (9), and cold energy is stored in the regenerator material. Here, when the evaporator (6) has a low load, that is, a low air volume, the temperature of the air that has passed through the evaporator (6) is lower, so that the cold storage efficiency is increased during the low load steady operation. Note that the circulation of the brine (11) may be stopped by stopping the electric pump (13) when all of the cold storage material is solidified.

  When the engine stops and the compressor (3) stops, operate the electric pump (13) to circulate the brine (11) between the receiver / discharger (12) and the brine container (9). The cold heat of the regenerator material in the regenerator (8) is transferred to the receiving and discharging cooler (12) by the brine (11), and the cold heat of the brine (11) is passed through the corrugated fin (38) to the evaporator (6). And transmitted to the wind passing through the cooler (12). Therefore, even if the temperature of the wind that has passed through the evaporator (6) rises, the wind is cooled by the air receiving and discharging cooler (12), so that a rapid decrease in cooling capacity is prevented.

In the above embodiment, the refrigerant circulation path (2) includes the compressor (3), the condenser (4), the expansion valve (5), and the evaporator (6), and circulates the fluorocarbon refrigerant. However, instead of this, the refrigerant circulation path includes a compressor, a gas cooler as a refrigerant cooler that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the gas cooler, and a refrigerant and an evaporator that have come out of the gas cooler. An intermediate heat exchanger for exchanging heat with the refrigerant coming out of the refrigerant may be provided, and a supercritical refrigerant such as CO ² may be circulated.

  Moreover, as an evaporator of the vehicle air conditioner according to the present invention, a plurality of flat hollow bodies formed by brazing peripheral edges with a pair of dish-like plates facing each other are arranged in parallel, and spaced apart from each other. A pair of header portions arranged in the above and between the header portions, the width direction is directed in the front-rear direction and the header portions are arranged at intervals in the length direction, and both end portions communicate with both header portions. A so-called laminated evaporator having a plurality of flattened heat exchange tube portions may be used. Furthermore, as the air conditioner for a vehicle air conditioner according to the present invention, a plurality of flat hollow bodies formed by brazing the peripheral portions with a pair of plate-shaped plates facing each other are arranged in parallel, A pair of header portions arranged at a distance from each other, and between the header portions, the width direction is directed in the front-rear direction and the header portions are arranged at intervals in the length direction, and both end portions are both headers. What has a plurality of flat brine circulation pipe parts made to connect to a section may be used.

1 is a system diagram showing a configuration of a vehicle air conditioner according to the present invention. It is a disassembled perspective view which shows the evaporator and receiving / cooling device of the vehicle air conditioner of FIG. It is the vertical sectional view seen from the right side which shows the evaporator and receiver / cooler of the vehicle air conditioner of FIG.

Explanation of symbols

(1): Vehicle air conditioner
(2): Refrigerant circulation path
(3): Compressor
(4): Condenser (refrigerant cooler)
(5): Expansion valve (pressure reducer)
(6): Evaporator
(7): Brine circulation path
(8): Regenerator
(9): Brine container
(11): Brine
(12): Receiver / cooler
(13): Electric pump
(20) (21): Header tank
(31): Heat exchange pipe (heat exchange pipe section)
(32) (33): Header tank
(37): Brine distribution pipe (brine distribution pipe section)
(38): Corrugated fin

Claims (3)

A refrigerant, a refrigerant cooler that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the refrigerant cooler, and an evaporator that evaporates the decompressed refrigerant, and a cold storage material are enclosed A regenerator, a brine container containing a regenerator, and a brine container for cooling the regenerator in the regenerator and receiving cold from the cooled regenerator, disposed downstream of the evaporator in the ventilation direction, and inside A vehicle air conditioner comprising: a cooling / receiving cooler through which brine flows, and a brine circulation path having a pump for circulating the brine between the brine container and the receiving / cooling device. The evaporator is provided with a plurality of heat exchange pipe parts arranged at intervals, and the receiver / discharger is provided with a plurality of brine circulation pipe parts arranged at intervals, so that the heat exchange of the evaporator The vehicle air conditioner according to claim 1, wherein the fins disposed between the pipe portions and the fins disposed between the adjacent brine circulation pipe portions of the cooler / receiver are shared. The evaporator is a pair of header tanks that are spaced apart from each other, and a plurality of header tanks that are spaced between the header tanks in the length direction of the header tank, and whose both ends are connected to both header tanks. A pair of header tanks spaced apart from each other, and between the header tanks, the header tank is the same as the heat exchange pipe of the evaporator in the length direction of the header tank. A plurality of brine circulation pipes that are arranged at intervals and connected to both header tanks at both ends, and the fins are disposed between adjacent heat exchange pipes of the evaporator, and The vehicle air conditioner according to claim 1 or 2, wherein the vehicular air conditioner is disposed so as to straddle between adjacent brine circulation pipes and joined to a heat exchange pipe of an evaporator and a brine circulation pipe of a receiver / discharger.

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