JP2019002350A - Cooling system - Google Patents

Abstract

To supply cooling water at a suitable temperature to a first heat exchanger in a cooling system for cooling the cooling water flowing through the first heat exchanger and the cooling water flowing through a second heat exchanger with a sub radiator.SOLUTION: A cooling system 1 includes a first heat exchanger 3 for exchanging heat between a cooling medium and first fluid 8, a second heat exchanger 5 for exchanging heat between the cooling medium and second fluid 9, and a radiator 7 for exchanging heat between the cooling medium and outside air 6. The radiator 7 includes a first radiating section 11 and a second radiating section 13, and the first heat exchanger 3 includes a first heat exchange section 15 and a second heat exchange section 17. The cooling medium flowing out of the first radiating section 11 is allowed to flow into the second radiating section 13 and the first heat exchange section 15, and the cooling medium flowing out of the second heat radiating section 13 is allowed to flow into the second heat exchange section 17.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooling system, for example, an apparatus having a water-cooled cooler such as a water-cooled condenser of an air conditioner (water-cooled condenser of an air conditioner) and a water-cooled CAC (charged air cooler).

  2. Description of the Related Art Conventionally, a vehicle heat exchange system (cooling system) is known in which cooling water flowing through a water-cooled condenser of an air conditioner and cooling water flowing through a water-cooled cooler such as a water-cooled CAC are cooled by a radiator (sub-radiator). (For example, refer to Patent Document 1).

JP 2013-032775 A

  By the way, the vehicle which cools the cooling water which flows through the water cooling condenser (1st heat exchanger) of an air conditioner, and the cooling water which flows through water cooling coolers (2nd heat exchanger), such as water cooling CAC, with a sub radiator. In the water-cooled condenser of this cooling system, it is desired to supply cooling water at an appropriate temperature to the water-cooled condenser in order to ensure the degree of supercooling of the refrigerant in the refrigeration cycle of the air conditioner.

  The present invention provides a cooling system in which cooling water flowing through a first heat exchanger and cooling water flowing through a second heat exchanger are cooled by a sub-radiator at a temperature suitable for the first heat exchanger. An object is to provide a cooling system capable of supplying water.

  The present invention provides a first heat exchanger that exchanges heat between a cooling medium and a first fluid, a second heat exchanger that exchanges heat between the cooling medium and a second fluid, A heat exchanger that exchanges heat between the cooling medium and the outside air, and the heat radiator includes a first heat dissipating part and a second heat dissipating part, and the first heat exchanger includes: A first heat exchange unit and a second heat exchange unit, the cooling medium coming out of the first heat radiation unit is allowed to flow to the second heat radiation unit and the first heat exchange unit, and the second It is the cooling system comprised so that the cooling medium which came out from the thermal radiation part may be flowed to the said 2nd heat exchange part.

  According to the present invention, in the cooling system in which the cooling water flowing through the first heat exchanger and the cooling water flowing through the second heat exchanger are cooled by the sub-radiator, an appropriate temperature for the first heat exchanger is obtained. The cooling water can be supplied.

It is a figure showing a schematic structure of a cooling system concerning an embodiment of the present invention. It is a figure which shows the sub radiator of the cooling system which concerns on embodiment of this invention. It is a figure which shows schematic structure of the cooling system which concerns on the 1st modification. It is a figure which shows schematic structure of the cooling system which concerns on the 2nd modification. It is a figure which shows schematic structure of the cooling system which concerns on the 3rd modification. It is a figure which shows schematic structure of the cooling system which concerns on the 4th modification.

  A cooling system 1 according to an embodiment of the present invention is used by being mounted on a vehicle such as an automobile, for example. As shown in FIG. 1, a first heat exchanger (for example, water cooling of an air conditioner) is used. A condenser; hereinafter referred to as a “water-cooled condenser”) 3, a second heat exchanger (for example, a water-cooled cooler of a CAC (charge air cooler); hereinafter referred to as a “water-cooled cooler”) 5, and a radiator ( For example, a sub-radiator 7 is provided.

  The water-cooled condenser 3 exchanges heat between a cooling medium (for example, cooling water) and a first fluid (for example, a refrigerant of an air conditioner) (a refrigerant 8 using cooling water). To cool)).

  The water-cooled cooler 5 is configured to exchange heat between the cooling water and the second fluid 9 different from the first fluid (the cooling fluid is used to cool the second fluid 9). ing). As the second fluid 9, for example, compressed air (intake air) that is compressed by a turbocharger or a supercharger and used for combustion of fuel in an internal combustion engine of a vehicle can be listed.

  The sub-radiator 7 is configured to exchange heat between the cooling water and the outside air 6 (to cool the cooling water by releasing the amount of heat of the cooling water to the outside air).

  The sub radiator 7 includes a first heat radiating portion 11 and a second heat radiating portion 13 that cools the cooling water to a temperature lower than that of the first heat radiating portion 11. The water-cooled condenser 3 includes a first heat exchanging unit (for example, a main condensing unit of the water-cooled condenser) 15 and a second heat exchanging unit (for example, cooling the refrigerant 8 to a temperature lower than the first heat exchanging unit 15). And a water-cooled condenser supercooling section) 17.

  Then, the cooling system 1 flows through the first heat radiating portion 11 of the sub radiator 7 and comes out of the first heat radiating portion 11 of the sub radiator 7, and cools the cooling water from the second heat radiating portion 17 of the sub radiator 7 and the water-cooled condenser 3. It flows to the first heat exchange unit 15.

  That is, a part of the cooling water coming out from the first heat radiating part 11 of the sub radiator 7 is caused to flow to the second heat radiating part 13 of the sub radiator 7, and the remaining cooling water coming out from the first heat radiating part 11 of the sub radiator 7 is left. Is passed through the first heat exchange section 15 of the water-cooled condenser 3.

  The cooling water flowing through the second heat radiating part 13 of the sub-radiator 7 and coming out of the second heat radiating part 13 is configured to flow to the second heat exchanging part 17 of the water-cooled condenser 3.

  Moreover, the cooling water which flows through the water-cooled condenser 3 (the 1st heat exchange part 15 and the 2nd heat exchange part 17), and came out from the water-cooled condenser 3 is comprised so that the water-cooled cooler 5 may be flowed.

  More specifically, in the cooling system 1, the water-cooled condenser 3, the water-cooled cooler 5, and the sub-radiator 7 are connected by a cooling water pipe path 18, and the water-cooled condenser 3, the water-cooled cooler 5, and the sub-radiator 7 are connected. Cooling water circulates.

  The piping path 18 includes a first part 19, a second part 21, a third part 23, a fourth part 25, and a fifth part 27.

  The first part 19 connects the cooling water outlet 11 t of the first heat radiating unit 11 and the cooling water inlet 15 n of the first heat exchange unit 15. The second part 21 connects the intermediate part 19 m of the first part 19 and the cooling water inlet 13 n of the second heat radiating part 13.

  The third portion 23 connects the cooling water outlet 13 t of the second heat radiating unit 13 and the cooling water inlet 17 n of the second heat exchange unit 17. The fourth portion 25 connects the cooling water outlet 15 t of the first heat exchange unit 15 and the cooling water outlet 17 t of the second heat exchange unit 17 to the cooling water inlet 5 n of the water cooling cooler 5.

  The fifth portion 27 connects the cooling water outlet 5 t of the water-cooled cooler 5 and the cooling water inlet 11 n of the first heat radiating unit 11. In addition, a pump 29 that creates a flow of cooling water is provided at, for example, an intermediate portion of the fifth portion 27.

  As shown in FIG. 2, the sub-radiator 7 includes a pair of headers 31 and 33 into which cooling water enters, and one of the pair of headers 31 and 33 provided between the pair of headers 31 and 33. A plurality of tubes 35 for flowing cooling water between the header 31 and the other header 33, and heat radiation fins 37 provided between these tubes 35 are provided. The interval between the plurality of tubes 35 (interval in the vertical direction in FIG. 2) is, for example, a constant value.

  The first heat radiating portion 11 is configured by a part of the plurality of tubes 35 (first group of tubes) 35 </ b> A. The second heat radiating portion 13 is constituted by the remaining tubes (second group of tubes) 35 </ b> B among the plurality of tubes 35.

  The number of tubes 35 </ b> A constituting the first heat radiation part 11 is larger than the number of tubes 35 </ b> B constituting the second heat radiation part 13. Thereby, the heat radiation amount of the cooling water in the first heat radiation portion 11 is larger than the heat radiation amount in the second heat radiation portion 13.

  More specifically, the inside of one header 31 is partitioned into two spaces 41 and 43 by a partition member 39 such as a partition plate, and the casing forming one space 41 of one header 31 is cooled. 11 n of water inlets are formed, and the housing of the other header 33 is formed with a first outlet of cooling water (cooling water outlet of the first heat radiation unit 11) 11 t. A second outlet 43 for cooling water (a cooling water outlet for the second heat radiating portion 13) 13 t is formed in the casing forming the other space 43.

  In the cooling system 1, the cooling water that has entered the one header 31 (one space 41) from the cooling water inlet 11n flows into the other header 33 through the first group of tubes 35A, and the other header. A part of the cooling water that has entered the inside 33 exits from the cooling water outlet 11 t of the other header 33 to the outside of the sub radiator 7.

  Further, the remaining cooling water that has entered the other header 33 flows from the other header 33 through the second group of tubes 35 </ b> B into the one header 31 (the other space 43). The cooling water outlet 13t goes out of the sub-radiator 7. The second heat radiating unit 13 cools the cooling water to a temperature lower than that of the first heat radiating unit 11.

  Next, the operation of the cooling system 1 will be described. In addition, the temperature shown below is an illustration. It is assumed that the temperature of the outside air 6 is 40 ° C. and the temperature of the cooling water entering the first heat radiating unit 11 is 65 ° C. It is assumed that the pump 29 and the like are operating.

  The cooling water that has entered the first heat radiating portion 11 is cooled by the outside air 6, and when it leaves the first heat radiating portion 11, the temperature becomes 55 ° C., for example.

  A part of the cooling water exiting the first heat radiating part 11 enters the first heat exchanging part 15, and the remaining 55 ° C. cooling water enters the second heat radiating part 13.

  The cooling water that has entered the first heat exchange section 15 cools the refrigerant (refrigerant that has flowed from the evaporator or compressor of the air conditioner) 8 so that the temperature is 65 ° C. when leaving the first heat exchange section 15. Become.

  The cooling water that has entered the second heat radiating portion 13 is cooled by the outside air 6, and when it leaves the second heat radiating portion 13, the temperature becomes 45 ° C.

  The cooling water exiting the second heat radiating unit 13 enters the second heat exchange unit 17. The cooling water that has entered the second heat exchange unit 17 further cools the refrigerant 8 that has been cooled by the first heat exchange unit 15, so that the temperature becomes 52 ° C. when leaving the second heat exchange unit 17.

  The cooling water exiting the first heat exchanging portion 15 and the cooling water exiting the second heat exchanging portion 17 are mixed with each other at the fourth portion 25, and the temperature becomes 60 ° C.

  The cooling water that has exited the first heat exchange unit 15 and the 60 ° C. cooling water that has been mixed with each other after exiting the second heat exchange unit 17 enters the water-cooled cooler 5.

  The cooling water that has entered the water-cooled cooler 5 cools the intake air 9 so that the temperature becomes 65 ° C. when leaving the water-cooled cooler 5.

  The 65 ° C. cooling water exiting the water cooling cooler 5 enters the first heat radiating section 11. In this manner, the cooling water circulates and the refrigerant 8 and the intake air 9 are cooled (heat exchange is performed between the outside air 6 and the refrigerant 8 and the intake air 9).

  According to the cooling system 1, the sub-radiator 7 includes the first heat radiating unit 11 and the second heat radiating unit 13, and the water-cooled condenser 3 includes the first heat exchanging unit 15 and the second heat exchanging unit 17. The cooling water coming out of the first heat radiating part 11 is allowed to flow to the second heat radiating part 13 and the first heat exchanging part 15, and the cooling water coming out of the second heat radiating part 13 is allowed to flow to the second heat exchanging part 17. Therefore, cooling water having an appropriate temperature (low temperature) can be flowed by the second heat exchanging portion 17 of the water-cooled condenser 3, and the refrigerant is supercooled (in the refrigeration cycle) in the water-cooled condenser 3. And the refrigeration cycle state can be optimized.

  More specifically, in a condenser (air-cooled condenser) of a refrigeration cycle of a conventional automobile air conditioner (air conditioner), the refrigerant of the refrigeration cycle flowing through the condenser (air-cooled condenser) is cooled using air. On the other hand, when the refrigerant of the refrigeration cycle is cooled using a water-cooled condenser, the refrigerant of the refrigeration cycle is cooled using the cooling water air-cooled by the air-cooled sub-radiator. It becomes difficult to take the degree of supercooling of the refrigerant at the outlet of the condenser (the temperature of the refrigerant at the condenser outlet becomes high), which may affect the air conditioning (cooling) performance. In addition, measures such as increasing the size of the air conditioning system are required to ensure air conditioning performance.

  On the other hand, in the cooling system 1, the cooling water that has come out of the second heat radiating unit 13 is configured to flow to the second heat exchange unit 17, so that it comes out of the second heat radiating unit 13 of the sub-radiator 7. The refrigerant 8 in the refrigeration cycle can be cooled by the refrigerant supercooling section 17 of the water-cooled condenser 3 using the cooling water having a low temperature, and the degree of supercooling of the refrigerant 8 at the outlet of the water-cooled condenser 3 can be appropriately obtained. it can.

  By supercooling the refrigerant 8, the temperature of the refrigerant 8 (8A) at the outlet of the water-cooled condenser 3 can be lowered to near the temperature of the outside air 6. Further, by supercooling the refrigerant 8, the refrigerant 8 can be reliably changed from a gas state to a liquid.

  Moreover, according to the cooling system 1, since the cooling water which came out of the water-cooled condenser 3 is flowed to the water-cooled cooler 5, the cooling water used for cooling the refrigerant 8 in the water-cooled condenser 3 is effectively used, The water-cooled cooler 5 can lower the temperature of the intake air 9.

  Further, according to the cooling system 1, the sub-radiator 7 includes headers 31 and 33 and a plurality of tubes 35, and the first heat radiating portion 11 includes a first group of tubes 35A. Since the second heat dissipating part 13 is composed of the second group of tubes 35B, the structure of the sub radiator 7 is simplified despite the provision of the two heat dissipating parts 11 and 13, and the cooling water is supplied. The piping path for flowing can be simplified.

  Next, a cooling system 1a according to a first modification will be described.

  As shown in FIG. 3, the cooling system 1 a according to the first modification includes the configuration of the water-cooled cooler 5, the piping path between the water-cooled condenser 3 and the water-cooled cooler 5, the water-cooled cooler 5, The piping path between the sub-radiator 7 is different from the cooling system 1 shown in FIG. 1, and the other points are the same as those of the cooling system 1 shown in FIG.

  That is, the water-cooled cooler 5 of the cooling system 1a according to the first modification includes a third heat exchange unit (high temperature side heat exchange unit) 45 and a fourth heat exchange unit (low temperature side heat exchange unit) 47. Configured.

  In the cooling system 1a, the cooling water outlet 15t of the first heat exchanging unit 15 and the cooling water inlet 45n of the third heat exchanging unit 45 are connected by a piping path, and the cooling water outlet 17t of the second heat exchanging unit 17 is connected. And the cooling water inlet 47n of the fourth heat exchanging portion 47 are connected by a piping path.

  In the cooling system 1a, the cooling water outlet 45t of the third heat exchanging unit 45, the cooling water outlet 47t of the fourth heat exchanging unit 47, and the cooling water inlet 11n of the first heat radiating unit 11 are connected by a piping path.

  Then, only the cooling water flowing through the first heat exchanging unit 15 of the water-cooled condenser 3 and coming out of the first heat exchanging unit 15 is caused to flow to the third heat exchanging unit 45 of the water-cooled cooler 5. Only the cooling water that flows through the second heat exchanging part 17 and comes out of the second heat exchanging part 17 is configured to flow to the fourth heat exchanging part 47 of the water-cooled cooler 5.

  Here, the temperature of the outside air 6 and the cooling water when the cooling system 1a according to the first modification is operating is illustrated in FIG.

  The temperature of the outside air 6 is 40 ° C. The temperature of the cooling water entering the first heat radiation part 11 is 65 ° C. The temperature of the cooling water coming out of the first heat radiating part 11 is 55 ° C. The temperature of the cooling water entering the second heat radiating unit 13 and the first heat exchanging unit 15 is also 55 ° C. The temperature of the cooling water coming out of the first heat exchange unit 15 is 65 ° C.

  The temperature of the cooling water coming out of the second heat radiating unit 13 is 45 ° C. The temperature of the cooling water entering the second heat exchange unit 17 is also 45 ° C. The temperature of the cooling water coming out of the second heat exchange unit 17 is 52 ° C.

  The temperature of the cooling water entering the third heat exchange unit 45 is also 65 ° C. The temperature of the cooling water coming out of the third heat exchange unit 45 is 72 ° C. The temperature of the cooling water entering the fourth heat exchange unit 47 is also 52 ° C. The temperature of the cooling water that has come out of the fourth heat exchange section 47 is 60 ° C.

  The temperature of the cooling water entering the first heat radiating unit 11 becomes 65 ° C. by mixing the cooling water coming out of the third heat exchange unit 45 and the cooling water coming out of the fourth heat exchange unit 47. Yes.

  According to the cooling system 1a, only the cooling water coming out of the first heat exchange unit 15 is allowed to flow to the third heat exchange unit 45, and only the cooling water coming out of the second heat exchange unit 17 is passed through the fourth heat exchange unit 47. Therefore, heat can be exchanged between the second heat exchanging unit 17 and the fourth heat exchanging unit 47 using cooling water having a low temperature, and the refrigerant 8 and the intake air 9 can be cooled.

  Next, a cooling system 1b according to a second modification will be described.

  The cooling system 1b according to the second modification is different from the cooling system 1a shown in FIG. 3 in the piping path between the water-cooled condenser 3 and the water-cooled cooler 5, as shown in FIG. This point is configured in the same manner as the cooling system 1a shown in FIG.

  In other words, the cooling system 1b according to the second modification is provided with a connection piping path (bypass pipe) 49. The connecting piping path 49 is a piping path (first and third heat exchanging section connecting pipe) 51 through which cooling water flows from the first heat exchanging section 15 of the water cooled condenser 3 to the third heat exchanging section 45 of the water cooled cooler 5. And a piping path (second / fourth heat exchanging section connecting pipe) 53 through which cooling water flows from the second heat exchanging section 17 of the water-cooled condenser 3 to the fourth heat exchanging section 47 of the water-cooled cooler 5, for example, These piping paths 51 and 53 are connected at an intermediate portion.

  And the cooling water which flowed through the 1st heat exchange part 15 of the water-cooled condenser 3 and came out from the 1st heat exchange part 15, and the 2nd heat exchange part 17 of the water-cooled condenser 3 flowed. The cooling water that has flowed out of the water-cooled cooler 5 flows through the third heat exchange unit 45 of the water-cooled cooler 5 and the fourth heat exchange unit 47 of the water-cooled cooler 5.

  As a result, the cooling water coming out of the first heat exchanging unit 15 and the cooling water coming out of the second heat exchanging unit 17 are mixed to some extent or completely mixed, so that the third heat exchanging unit 45 and the fourth heat exchanging part are mixed. It flows to the exchange unit 47.

  FIG. 4 illustrates the temperatures of the outside air 6 and the cooling water when the cooling system 1b according to the second modification is operating.

  The temperature of the outside air 6 is 40 ° C. The temperature of the cooling water entering the first heat radiation part 11 is 65 ° C. The temperature of the cooling water coming out of the first heat radiating part 11 is 55 ° C. The temperature of the cooling water entering the second heat radiating unit 13 and the first heat exchanging unit 15 is 55 ° C. The temperature of the cooling water coming out of the first heat exchange unit 15 is 65 ° C.

  The temperature of the cooling water coming out of the second heat radiating unit 13 is 45 ° C. The temperature of the cooling water entering the second heat exchange unit 17 is also 45 ° C. The temperature of the cooling water coming out of the second heat exchange unit 17 is 52 ° C.

  If the connection piping path 49 is provided and the cooling water that has exited the first heat exchange unit 15 and the cooling water that has exited the second heat exchange unit 17 are completely mixed, the third heat exchange unit 45 The temperature of the cooling water entering and the cooling water entering the fourth heat exchanging section 47 are 58 ° C. The temperature of the cooling water that has come out of the third heat exchange unit 45 is 70 ° C. The temperature of the cooling water coming out of the fourth heat exchange unit 47 is 62 ° C.

  The temperature of the cooling water entering the first heat radiating unit 11 becomes 65 ° C. by mixing the cooling water coming out of the third heat exchange unit 45 and the cooling water coming out of the fourth heat exchange unit 47. Yes.

  The cooling water that has exited the first heat exchanging section 15 and the cooling water that has exited the second heat exchanging section 17 are not completely mixed with each other. And the part of the cooling water that has exited the second heat exchange unit 17 are mixed with each other by the connecting piping path 49, the temperature of the cooling water entering the third heat exchange unit 45 is The temperature is slightly higher than the temperature of the cooling water entering the fourth heat exchange unit 47.

  In the cooling system 1b shown in FIG. 4, a flow rate adjustment valve capable of adjusting the flow rate of the cooling water is provided in the connection piping path 49, for example, cooling that has exited the first heat exchange unit 15 or the second heat exchange unit 17 You may make it adjust the temperature difference of the temperature of the cooling water which enters into the 3rd heat exchange part 45, and the temperature of the cooling water which enters into the 4th heat exchange part 47 according to the temperature of water.

  According to the cooling system 1b, the temperature difference between the temperature of the cooling water entering the third heat exchange unit 45 and the temperature of the cooling water entering the fourth heat exchange unit 47 can be reduced. The value of the thermal stress generated between the third heat exchanging part 45 and the fourth heat exchanging part 47 can be reduced.

  Next, a cooling system 1c according to a third modification will be described.

  As shown in FIG. 5, the cooling system 1 c according to the third modified example has the water-cooled condenser 3 and the water-cooled cooler 5 that are not divided into a plurality of heat exchanging units and have come out of the first heat radiating unit 11. It differs from the heat exchange system shown in FIGS. 1 to 4 in that the cooling water is caused to flow through the second heat exchange unit 17 and the cooling water that has come out of the second heat radiating unit 13 is caused to flow through the first heat exchange unit 15.

  That is, the cooling system 1c according to the third modification includes a water-cooled condenser 3 that exchanges heat between the cooling water and the refrigerant 8, and a water-cooled cooler 5 that exchanges heat between the cooling water and the intake air 9. And a sub-radiator 7 for exchanging heat between the cooling water and the outside air 6.

  The sub radiator 7 includes a first heat radiating portion 11 and a second heat radiating portion 13. Then, the cooling water coming out from the first heat radiating part 11 of the sub radiator 7 is caused to flow through the water cooling cooler 5 and the second heat radiating part 13 of the sub radiator 7, and the cooling coming out from the second heat radiating part 13 of the sub radiator 7. The water is flowed to the water-cooled condenser 3.

  That is, it flows through the first heat radiating part 11 of the sub-radiator 7 and flows out of the first heat radiating part 11, flows a part of the cooling water to the water-cooled cooler 5, and the other radiated from the first heat radiating part 11 of the sub-radiator 7. All the remaining cooling water flows through the second heat radiating portion 13 of the sub-radiator 7, flows through the second heat radiating portion 13 of the sub-radiator 7, and all the cooling water that has come out of the second heat radiating portion 13 is cooled with the water-cooled condenser 3. It is comprised so that it may flow.

  Here, the temperature of the outside air 6 and the cooling water when the cooling system 1c according to the third modification is operating is illustrated in FIG.

  The temperature of the outside air 6 is 40 ° C. The temperature of the cooling water entering the first heat radiation part 11 is 65 ° C. The temperature of the cooling water coming out of the first heat radiating part 11 is 55 ° C. The temperature of the cooling water entering the second heat radiation part 13 and the water-cooled cooler 5 is also 55 ° C.

  The temperature of the cooling water coming out of the water cooling cooler 5 is 72 ° C. The temperature of the cooling water coming out of the second heat radiation part 13 is 45 ° C., the temperature of the cooling water entering the water-cooled condenser 3 is also 45 ° C., and the cooling water coming out of the water-cooled condenser 3 The temperature is 60 ° C.

  The temperature of the cooling water entering the first heat radiating unit 11 is 65 ° C. because the cooling water coming out of the water-cooled condenser 3 and the cooling water coming out of the water-cooled cooler 5 are mixed.

  According to the cooling system 1c, the cooling water coming out from the first heat radiating unit 11 is allowed to flow to the water-cooled cooler 5 and the second heat radiating unit 13, and the cooling water coming out from the second heat radiating unit 13 is passed to the water-cooled condenser 3. Since it flows, cooling water with a low temperature can be flowed to the water-cooled condenser 3, and the refrigerant | coolant 8 can be supercooled by a refrigerating cycle.

  Next, a cooling system 1d according to a fourth modification will be described.

  As shown in FIG. 6, the cooling system 1 d according to the fourth modification is configured such that the cooling water coming out from the second heat exchange unit 17 of the water-cooled condenser 3 is converted into the first heat exchange unit 15 of the water-cooled condenser 3. 1 differs from the cooling system 1 shown in FIG. 1 in that it flows through the water-cooled cooler 5, and the other points are configured in substantially the same manner as the cooling system 1.

  That is, the cooling system 1 d according to the fourth modification example uses the cooling water flowing through the second heat exchange unit 17 of the water-cooled condenser 3 and exiting the second heat exchange unit 17 as the first cooling water of the water-cooled condenser 3. The heat exchanger 15 is configured to flow directly.

  And it flows through the 1st heat radiating part 11 of the sub radiator 7, the cooling water which came out from the 1st heat radiating part 11, and the 2nd heat exchanging part 17 of the water-cooled condenser 3 which is supplied from the 2nd heat radiating part 13 and flows. The cooling water that has come out of the second heat exchange unit 17 is mixed to some extent in the first heat exchange unit 15 and flows through the first heat exchange unit 15 of the water-cooled condenser 3. In addition, all the cooling water which flowed in the 1st heat exchange part 15 and came out from the 1st heat exchange part 15 flows into the water cooling cooler 5. FIG.

  In the cooling system 1d, the water-cooled condenser 3 is constituted by, for example, a single plate heat exchanger.

  The plate heat exchanger is provided with a first fluid inlet 55, a first fluid outlet 57, a first cooling water inlet 59, a second cooling water inlet 61, and a cooling water outlet 63.

  The refrigerant 8 having entered the plate heat exchanger 3 from the first fluid inlet 55 flows through the plate heat exchanger 3 and comes out of the first fluid outlet 57.

  Further, the cooling water flowing through the first heat radiating portion 11 of the sub radiator 7 and coming out of the first heat radiating portion 11 enters the first heat exchanging portion 15 from the first cooling water inlet 59, and the second heat radiating of the sub radiator 7. Cooling water flowing through the section 13 and coming out of the second heat radiating section 13 enters the second heat exchange section 17 from the second cooling water inlet 61.

  Furthermore, the cooling water that has flowed through the second heat exchange unit 17 flows through the first heat exchange unit 15 together with the cooling water that has entered the first heat exchange unit 15 from the first cooling water inlet 59. That is, in the first heat exchanging unit 15, the cooling water that has come out of the first heat radiating unit 11 and the cooling water that has flowed through the second heat exchanging unit 17 are mixed to some extent or completely. In addition, a refrigerant | coolant flows from the 2nd heat exchange part 17 of the water-cooled condenser 3 to the 1st heat exchange part 15 without using piping.

  The cooling water that has flowed through the first heat exchange unit 15 comes out from the cooling water outlet 63, and the cooling water that has come out flows to the water-cooled cooler 5.

  Further, in the plate heat exchanger 3, the cooling water and the refrigerant 8 are not mixed with each other, and heat exchange (cooling of the refrigerant) is performed between the plates via the plate of the plate heat exchanger 3. It has become so.

  Here, the temperatures of the outside air 6 and the cooling water when the cooling system 1d according to the fourth modification is operating are illustrated in FIG.

  The temperature of the outside air 6 is 40 ° C. The temperature of the cooling water entering the first heat radiation part 11 is 65 ° C. The temperature of the cooling water coming out of the first heat radiating part 11 is 55 ° C. The temperature of the cooling water entering the second heat radiating unit 13 and the first heat exchanging unit 15 is also 55 ° C.

  The temperature of the cooling water coming out of the second heat radiating unit 13 is 45 ° C. The temperature of the cooling water entering the first heat exchange unit 15 is 55 ° C., and the temperature of the cooling water entering the second heat exchange unit 17 is 45 ° C.

  The temperature of the cooling water flowing through the second heat exchange unit 17 is 50 ° C., and the temperature of the cooling water flowing through the first heat exchange unit 15 is 53 ° C. The temperature of the cooling water that has come out of the first heat exchange unit 15 is 60 ° C.

  The temperature of the cooling water entering the water cooling cooler 5 is 60 ° C., and the temperature of the cooling water coming out of the water cooling cooler 5 is 65 ° C.

  According to the cooling system 1d, since the cooling water that has exited the second heat exchange unit 17 is configured to flow directly to the first heat exchange unit 15, the refrigerant in the second heat exchange unit 17 having a small amount of exchange heat. The cooling water used for the cooling of the first heat exchange unit 15 can be effectively used.

  In the above description, the intake air 9 is taken as an example of the second fluid. However, the supply air supplied to the prime mover by EGR (exhaust gas recirculation) may be adopted as the second fluid, or EGR. The air containing the supply air supplied to the prime mover may be employed, or other gases may be employed.

1, 1b, 1c, 1d Cooling system 3 First heat exchanger (water-cooled condenser)
5 Second heat exchanger (water-cooled cooler)
6 Outside air 7 Radiator (sub-radiator)
8 First fluid (refrigerant)
9 Second fluid (intake)
11 1st heat radiation part 13 2nd heat radiation part 15 1st heat exchange part (main condensation part)
17 2nd heat exchange part (supercooling part)
31, 33 Header 35, 35A, 35B Tube 45 Third heat exchange part 47 Fourth heat exchange part 49 Connection piping path

Claims (12)

A first heat exchanger for exchanging heat between the cooling medium and the first fluid;
A second heat exchanger for exchanging heat between the cooling medium and a second fluid;
A radiator that exchanges heat between the cooling medium and outside air;
The radiator includes a first heat radiating portion and a second heat radiating portion, and the first heat exchanger includes a first heat exchanging portion and a second heat exchanging portion. The cooling medium that comes out of the first heat radiating portion flows through the second heat radiating portion and the first heat exchange portion, and the cooling medium that comes out of the second heat radiating portion is exchanged with the second heat exchange portion. A cooling system characterized by being configured to flow through a section. The cooling system of claim 1, wherein
The first heat exchanger is a water-cooled condenser of an air conditioner,
The first heat exchange unit is a main condensing unit of the water-cooled condenser,
The cooling system, wherein the second heat exchange unit is a supercooling unit of the water-cooled condenser. The cooling system according to claim 1 or 2,
A cooling system configured to cause the cooling medium that has come out of the first heat exchanger to flow to the second heat exchanger. In the cooling system according to any one of claims 1 to 3,
The second heat exchanger includes a third heat exchange part and a fourth heat exchange part, and is configured as a cooling system. The cooling system according to claim 4.
The second heat exchanger is a water-cooled cooler;
The third heat exchange part is a high temperature side cooling part of a water-cooled cooler,
The cooling system, wherein the fourth heat exchange part is a low temperature side cooling part of a water-cooled cooler. The cooling system according to claim 4 or 5,
The cooling medium that has come out of the first heat exchanging part is caused to flow to the third heat exchanging part, and the cooling medium that has come out of the second heat exchanging part is caused to flow to the fourth heat exchanging part. A cooling system featuring. The cooling system according to claim 6.
The cooling medium that has come out of the first heat exchange part and the cooling medium that has come out of the second heat exchange part are configured to flow through the third heat exchange part and the fourth heat exchange part. A cooling system characterized by that. The cooling system according to claim 7,
A connecting piping path connecting a piping path for flowing a cooling medium from the first heat exchange section to the third heat exchanging section and a piping path for flowing a cooling medium from the second heat exchange section to the fourth heat exchanging section. A cooling system comprising: A first heat exchanger for exchanging heat between the cooling medium and the first fluid;
A second heat exchanger for exchanging heat between the cooling medium and a second fluid;
A radiator that exchanges heat between the cooling medium and outside air;
The radiator is configured to include a first heat radiating portion and a second heat radiating portion,
The cooling medium coming out of the first heat radiating portion is caused to flow through the second heat exchanger and the second heat radiating portion, and the cooling medium coming out from the second heat radiating portion is caused to flow into the first heat exchanger. A cooling system characterized by being configured as follows. In the cooling system according to any one of claims 1 to 5,
A cooling system configured to cause the cooling medium that has come out of the second heat exchange section to flow through the first heat exchange section. The cooling system of claim 10, wherein
The cooling system according to claim 1, wherein the first heat exchanger is configured by a plate heat exchanger. The cooling system according to any one of claims 1 to 11,
The heat radiator includes a pair of headers, a plurality of tubes provided between the pair of headers, and a cooling medium flowing between one header and the other of the pair of headers, and It is configured with radiating fins provided between the tubes,
The first heat dissipating part is composed of a part of the plurality of tubes, and the second heat dissipating part is composed of the remaining tubes of the plurality of tubes, The cooling system, wherein the number of tubes constituting the first heat radiating section is greater than the number of tubes constituting the second heat radiating section.

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