JP2010083177A - Air-conditioning system for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning system for vehicle capable of heating an interior of a vehicle efficiently even when a supplying amount of coolant to a radiator increases. <P>SOLUTION: The air-conditioning system is provided with: the radiator 7 that cools the coolant 5 supplied from an engine 3 of the vehicle and returns the coolant 5; a plurality of front heater 9 and rear heaters 11, 13 arranged in parallel and through which the coolant 5 from the engine 3 circulates; and an engine side water pump 19 that supplies the coolant 5 to the radiator 7, the front heater 9, and the rear heaters 11, 13. Piping for connecting the engine 3 to the heaters 11, 13 includes an internal-combustion engine side piping 23 extending from the engine 3 and a heat exchanger side piping 25 branched into a plurality of branches from an end of the internal-combustion engine side piping 23 to be respectively connected to the heaters 9, 11, 13, and the internal-combustion engine side piping 23 is provided with a heater side water pump 15 that supplies the coolant 5 from the engine 3 to the heaters 9, 11, 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a vehicle air conditioning system.

  2. Description of the Related Art Conventionally, an air conditioner is known in which a front heater is disposed in a front part of an automobile and a rear heater is disposed in a rear part (see, for example, Patent Document 1).

  In Patent Document 1, a first heating heat exchanger constituting a front heater and a second heating heat exchanger constituting a rear heater are arranged in parallel, and a water pump is arranged in the vicinity of the engine. The engine, the water pump, the first heating heat exchanger (front heater), and the second heating heat exchanger (rear heater) are connected via a pipe, and a cooling medium is circulated in the pipe.

  Then, by driving the water pump, the cooling medium heated by the exhaust heat of the engine is sent to the first heating heat exchanger and the second heating heat exchanger through the pipe to heat the vehicle interior. ing.

Japanese Patent No. 3339346

  In the prior art, a radiator that cools the high-temperature coolant discharged from the engine is provided. When the discharge amount of the water pump is increased, the amount of coolant supplied to the front heater and the rear heater is increased. Become.

  On the other hand, however, the amount of cooling medium fed to the radiator also increases, so that the cooling medium gets too cold, and the heating effect of the front heater and rear heater may be reduced.

  Therefore, the present invention has been made in view of the above circumstances, and the object of the present invention is to efficiently heat the vehicle interior even when the amount of cooling medium fed to the radiator is increased. It aims at providing the vehicle air-conditioning system which can do.

  In order to achieve the above object, according to the present invention, a radiator that cools a cooling medium heated by exhaust heat of the internal combustion engine and returns it to the internal combustion engine, and a plurality of cooling mediums from the internal combustion engine circulate. A heater heat exchanger provided, and an engine-side water pump that feeds a cooling medium to the radiator and the heater heat exchanger, and a pipe that connects the internal combustion engine and the heater heat exchanger, An internal combustion engine side pipe extending from the internal combustion engine, and a heat exchanger side pipe branched into a plurality from an end of the internal combustion engine side pipe and connected to each heater heat exchanger, the internal combustion engine side pipe The most important feature is that a heater-side water pump for feeding the cooling medium to the heater heat exchanger is disposed.

  According to the vehicle air-conditioning system of the present invention, the heater-side water pump is disposed separately from the engine-side water pump, so that the coolant is supplied to the radiator by operating the heater-side water pump. Even when the amount increases, the heating efficiency in the vehicle compartment can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing circulation of a cooling medium in a vehicle air conditioning system according to an embodiment of the present invention.

  The vehicle air conditioning system 1 according to the present embodiment includes an engine 3 (internal combustion engine) serving as a drive source of the vehicle, and a radiator 7 that cools the cooling medium 5 heated by exhaust heat generated by driving the engine 3. The front heater 9 and the rear heaters 11 and 13 are arranged, and the heater-side water pump 15 arranged upstream of the flow of the cooling medium 5 of the front heater 9 and the rear heaters 11 and 13 is provided. The engine 3, the radiator 7, the heater-side water pump 15, the front heater 9, and the rear heaters 11 and 13 are connected via a pipe 17, and a cooling medium 5 such as cooling water is passed through the pipe 17. It is in circulation.

  The engine 3 is an internal combustion engine of a vehicle. For example, the engine 3 is disposed in the engine room at the front of the vehicle body and is operated to generate exhaust heat. The engine 3 and the radiator 7 are connected via a pipe 17, and the cooling medium 5 circulates inside the pipe 17. The engine 3 has a built-in engine-side water pump 19. When the engine-side water pump 19 is operated, the cooling medium 5 heated by the exhaust heat of the engine 3 passes through the pipe 17. Is sent to the radiator 7. In the radiator 7, the high-temperature cooling medium 5 is cooled and then returned to the engine 3 through the pipe 17.

  On the other hand, another pipe is extended from the engine 3 toward the front heater 9 and the rear heaters 11 and 13 through a different path from the pipe to the radiator 7. Among these pipes, the pipe arranged on the upstream side of the flow of the cooling medium 5 and extending from the engine 3 to the branch point 21 is an internal combustion engine side pipe 23, and from the branch point 21 to the front heater 9 and the rear heaters 11 and 13. The piping is a heat exchanger side piping 25, and the piping that is arranged on the upstream side of the cooling medium 5 and returns from the front heater 9 and the rear heaters 11 and 13 to the engine 3 is a downstream piping 27. A heater-side water pump 15 different from the engine-side water pump 19 built in the engine 3 is disposed in the middle of the internal combustion engine-side pipe 23.

  And the front heater 9 mentioned above is arrange | positioned in the front part of the vehicle interior which is not shown in figure, and the rear heaters 11 and 13 are arrange | positioned in the rear part of the interior. The front heater 9 and the rear heaters 11 and 13 are arranged in parallel with each other, and are connected to a heat exchanger side pipe 25 branched into a plurality (three in this embodiment) from the branch point 21. As described above, the front heater 9 and the rear heaters 11 and 13 are arranged in parallel in the circulation path, and the cooling medium 5 branches from the branch point 21 to the respective pipes and flows to the front heater 9 and the rear heaters 11 and 13. . Further, the cooling medium 5 discharged from the front heater 9 and the rear heaters 11 and 13 returns to the engine 3 through the downstream pipe 27.

  Thus, the coolant 5 discharged from the engine 3 is sent to the radiator 7, the front heater 9, and the rear heaters 11 and 13 by operating the engine-side water pump 19 and the heater-side water pump 15, and then the engine 3. A circulation path to return to is formed.

  The front heater 9 is configured in an analog adjustment format that can vary between so-called “Full Cool” and “Full Warm”, for example, by sliding the knob in the left-right direction. That is, in the case of “Full Warm”, 100% of the high-temperature cooling medium 5 fed through the heat exchanger side pipe 25 is circulated, and the blower fan (not shown) is operated to seat the occupant seated in the front seat. Send warm air against.

  In the case of “Full Cool”, a valve (not shown) provided in the heat exchanger side pipe 25 is operated to cut off the flow of the cooling medium 5 in the heat exchanger side pipe 25 and is not shown. The blower fan is operated to send a cold traveling wind to the passenger seated in the front seat.

  Then, in the middle of “Full Cool” and “Full Warm”, a valve (not shown) provided in the heat exchanger side pipe 25 is operated to cause the flow of the cooling medium 5 in the heat exchanger side pipe 25 to flow. The air pressure is reduced to about 50% of the maximum time, and a blower fan (not shown) is operated to send wind to the passenger seated in the front seat. When “OFF” is selected, a valve (not shown) provided in the heat exchanger side pipe 25 is operated to shut off the flow of the high-temperature cooling medium 5 and to stop the operation of the blower fan. Stops blowing air to passengers seated in the seat.

  On the other hand, the rear heaters 11 and 13 are configured in a digital adjustment form of so-called “ON” and “OFF”. That is, when it is “ON”, a valve (not shown) provided in the heat exchanger side pipe 25 is operated to flow the high-temperature cooling medium 5 at a maximum of 100% and a fan (not shown) is operated. , Send warm air to the passengers seated in the rear seats. When “OFF” is selected, a valve (not shown) provided in the heat exchanger side pipe 25 is operated to block the flow of the high-temperature cooling medium 5 and the operation of the blower fan is stopped. Stops blowing air to passengers seated in the seat.

  FIG. 2 is a table showing operating states of the front heater, the rear heater, and the water pump according to the embodiment of the present invention.

  As shown in the leftmost column of this table, when both the front heater 9 and the rear heaters 11 and 13 are to be stopped, the operation of the heater-side water pump 15 is stopped. In this case, only the engine-side water pump 19 is operated to feed the cooling medium 5 to the radiator 7, while the heater-side water pump 15 is stopped to feed the cooling medium 5 to the front heater 9 and the rear heaters 11 and 13. Stop paying.

  Further, when the front heater 9 is turned “OFF” and the rear heaters 11 and 13 are turned “ON”, as described above, the engine side water pump 19 and the heater side water pump 15 are operated and the valves are operated. The flow of the cooling medium 5 to the front heater 9 is blocked, and the operation of the blower fan is also stopped to stop the blowing of air to the passenger seated in the front seat.

  When the front heater 9 is set to “Full Cool” and the rear heaters 11 and 13 are set to “ON”, both the engine-side water pump 19 and the heater-side water pump 15 are operated to supply the cooling medium to the rear heaters 11 and 13. On the other hand, the supply of the cooling medium 5 to the front heater 9 is stopped and the traveling wind is sent to the front seat by the blower fan. This is because, for example, on a sunny day such as spring or autumn, the front seat occupant gets hot under the sun, so the front heater 9 is set to “Full Cool”, while the rear seat occupant is shaded. Since it feels cold, it is suitable for heating the rear seat by heating.

  When the front heater 9 is set to “other than Full Cool” and the rear heaters 11 and 13 are set to “OFF”, both the engine-side water pump 19 and the heater-side water pump 15 are operated and the valves are operated to operate the rear heater. The supply of the cooling medium 5 to 11 and 13 is stopped.

  When the front heater 9 is set to “other than Full Cool” and the rear heaters 11 and 13 are turned “ON”, both the engine-side water pump 19 and the heater-side water pump 15 are operated.

  Below, the effect by embodiment of this invention is demonstrated.

(1) The piping that connects the engine 3 to the front heater 9 and the rear heaters 11 and 13 (heat exchangers for heaters) includes an internal combustion engine side piping 23 extending from the engine 3 and an end portion of the internal combustion engine side piping 23. And a heat exchanger side pipe 25 branched into a plurality of front heaters 9 and rear heaters 11, 13. The cooling medium 5 sent from the engine 3 is fed to the internal combustion engine side pipes 23. A heater-side water pump 15 for feeding toward the heater 9 and the rear heaters 11 and 13 is provided.

  As described above, since the heater-side water pump 15 is provided separately from the engine-side water pump 19, by operating the heater-side water pump 15, the high-temperature cooling medium 5 discharged from the engine 3 is moved to the front. The vehicle interior can be efficiently heated by being fed to the heater 9 and the rear heaters 11 and 13.

  Further, the amount of the cooling medium circulating through the front heater 9 and the rear heaters 11 and 13 can be greatly increased without modifying the structure of the engine 3. Furthermore, a bypass circuit, a check valve or the like is not necessary, and the structure of the air conditioning system is simplified, thereby reducing the cost.

(2) By stopping the operation of the heater-side water pump 15, the flow of the cooling medium 5 to the front heater 9 and the rear heaters 11 and 13, which are heat exchangers for heaters, is stopped, and the cooling medium 5 to the radiator 7 is stopped. The feed amount is increased.

  Therefore, even when the discharge amount of the cooling medium 5 from the engine-side water pump 19 is increased, the cooling medium 5 does not flow to the front heater 9 and the rear heaters 11 and 13, and the inflow amount to the radiator 7 increases. Therefore, the operation of the radiator 7 becomes active, and the cooling medium 5 can be reliably cooled without increasing the size of the radiator 7.

It is the schematic which shows the circulation of the cooling medium in the vehicle air conditioning system by embodiment of this invention. It is a table | surface which shows the operating condition of the front heater by the embodiment of this invention, a rear heater, and a water pump.

Explanation of symbols

1 ... Vehicle air conditioning system 3 ... Engine (internal combustion engine)
5 ... Cooling medium 9 ... Front heater (heat exchanger for heater)
11, 13 ... Rear heater (heat exchanger for heater)
DESCRIPTION OF SYMBOLS 15 ... Heater side water pump 19 ... Engine side water pump 21 ... Branch point 23 ... Internal combustion engine side piping 25 ... Heat exchanger side piping

Claims (2)

An internal combustion engine of a vehicle, a radiator for cooling a cooling medium sent from the internal combustion engine and returning it to the internal combustion engine, a plurality of heater heat exchangers through which the cooling medium from the internal combustion engine flows, and for these radiators and heaters An engine-side water pump that supplies a cooling medium to the heat exchanger, and the heat exchanger for the internal combustion engine, the radiator, and the heater is connected through a pipe through which the cooling medium flows. Because
The piping that connects the internal combustion engine and the heat exchanger for heaters is divided into a plurality of internal combustion engine-side piping extending from the internal combustion engine and the end of the internal combustion engine-side piping, and is connected to the respective heat exchangers for heaters. Heat exchanger side piping
A vehicle air conditioning system, wherein a heater-side water pump for supplying a cooling medium sent from an internal combustion engine toward a heater heat exchanger is disposed in the internal combustion engine-side piping.   By stopping the operation of the heater-side water pump, the flow of the cooling medium to the heater heat exchanger in the internal combustion engine-side piping is stopped, and the amount of the cooling medium fed to the radiator is increased. The vehicle air conditioning system according to claim 1, wherein

Images