JP2009234389A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air conditioner having excellent quick-warming performance which is capable of blowing hot air into a cabin immediately when heating is started. <P>SOLUTION: The vehicular air conditioner comprises an air compressor 12 which compresses air sucked through an air intake 11a and discharges it as high-temperature and high-pressure air, and a radiator 14 for feeding hot air by heat exchange between the high-temperature and high-pressure air discharged from the air compressor 12 and the air to be led into a cabin 2b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner for heating a passenger compartment.

  As this type of conventional vehicle air conditioner, there are ones that direct the air around the engine heated by the engine directly into the passenger compartment (see Patent Document 1), and those that utilize the exhaust heat of the engine. (Refer to patent document 1) However, there are problems with the cleanliness and quietness of air blowing, and the structure is very complicated.

Other conventional vehicle air conditioners include a radiator that circulates engine cooling water, and uses this radiator to exchange heat between the cooling water and the air blown into the passenger compartment (patent). Reference 1). In this other conventional example, there is no problem in the cleanliness and quietness of the air blowing, and the structure of the vehicle air conditioner is simple.
JP 2006-143010 A JP-A-9-66722

  However, in another conventional example, the engine coolant does not rise to a temperature suitable for heating unless a certain amount of time has elapsed since the start of the engine. In particular, when the mounted engine can be driven at a low temperature, the immediate warming property is further deteriorated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle air conditioner that can quickly blow warm air from the inside of a vehicle compartment from the start of heating and has excellent immediate warming properties.

  The invention of claim 1 that achieves the above object is to compress air sucked from an air intake and discharge it as high-temperature and high-pressure air; high-temperature and high-pressure air discharged from the air compressor; It is characterized by comprising a heat radiator that exchanges heat with the air blown to the air and uses the blown air as warm air.

  A second aspect of the present invention is the vehicle air conditioner according to the first aspect, wherein the air intake port is opened in an engine room.

  A third aspect of the present invention is the vehicle air conditioner according to the first or second aspect, wherein the air duct for guiding the air taken in from the air intake port is disposed along the outer periphery of the exhaust pipe of the engine. It is characterized by.

  A fourth aspect of the present invention is the vehicle air conditioner according to the third aspect, wherein the air duct arranged along the outer periphery of the exhaust pipe is in a range from the air intake to the air compressor. It is characterized by being.

  A fifth aspect of the present invention is the vehicle air conditioner according to the third or fourth aspect, wherein heat radiation fins having high thermal conductivity extending from an outer periphery of the exhaust pipe are arranged in the air duct. It is characterized by being.

  A sixth aspect of the present invention is the vehicle air conditioner according to any one of the first to fifth aspects, wherein an air restrictor is provided in a downstream air duct of the radiator. It is characterized by.

  A seventh aspect of the present invention is the vehicle air conditioner according to any one of the first to sixth aspects, wherein the air duct is configured to take in the exhaust of the engine. .

  The invention according to claim 8 is the vehicle air conditioner according to any one of claims 1 to 7, wherein power is recovered from exhaust air that has passed through the radiator, and the recovered power is compressed into the air. It is characterized by supplying to the machine.

  A ninth aspect of the invention is the vehicle air conditioner according to any one of the first to eighth aspects, wherein the air taken into the air intake port is supercharged by the exhaust pressure of the exhaust pipe. And

  According to the first aspect of the invention, since the air compressor creates high-temperature and high-pressure air by compression, high-temperature and high-pressure air is discharged from the air compressor at the start of driving, and the high-temperature and high-pressure air passes through the radiator. Since the air blow is heated and becomes warm air and is led into the vehicle interior, the warm air can be immediately introduced into the vehicle interior at the start of driving the air compressor, that is, from the start of heating, and it has excellent warmth. Yes.

  Moreover, compared with the case where the high-temperature and high-pressure air discharged from the air compressor is introduced into the vehicle interior, the air blowing is excellent in cleanliness and quietness. Furthermore, the blast power can be freely adjusted, and there is no need to adjust the pressure in the passenger compartment.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the inside of the engine room is warmed by driving the engine, the warm air is taken into the air compressor, so that the heating performance is improved.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, when high-temperature exhaust flows through the exhaust pipe by driving the engine, the air taken in from the air intake by the exhaust heat is Since it is heated, the heating performance is improved.

  According to the invention of claim 4, in addition to the effect of the invention of claim 3, since the air compressor compresses the air heated by the exhaust heat of the exhaust pipe, the heating performance is improved.

  According to the invention of claim 5, in addition to the effect of the invention of claim 3 or claim 4, the exhaust heat of the exhaust pipe is efficiently transmitted to the air taken in from the air intake, contributing to the improvement of the heating performance. To do.

  According to the invention of claim 6, in addition to the effects of the inventions of claims 1 to 5, the high-pressure air flowing through the radiator is not discharged outside the passenger compartment in a high-pressure state, and the After being discharged, it is discharged out of the passenger compartment, so that noise caused by discharged sound can be prevented as much as possible.

  According to the invention of claim 7, in addition to the effects of the inventions of claims 1 to 6, the exhaust heat of the engine can be directly used, so that the heating performance is improved.

  According to the invention of claim 8, in addition to the effects of the inventions of claims 1 to 7, the rotational power of the air compressor can be reduced, so that power saving can be achieved.

  According to the ninth aspect of the invention, in addition to the effects of the first to eighth aspects of the invention, the compression power of the air compressor can be reduced, so that power saving can be achieved.

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

(First embodiment)
1 and 2 show a first embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a vehicle air conditioner, and FIG. 2 is a sectional view taken along line AA of FIG.

  In FIG. 1, an engine 3 is arranged in an engine room 2 a of a vehicle 1. The exhaust pipe 4 of the engine 3 extends to the rear part of the vehicle 1 through the lower part of the vehicle compartment 2b.

  The vehicle air conditioner 10 </ b> A includes an air supply duct 11, an air compressor 12 in which the other end of the air supply duct 11 is connected to the air supply port, and one end connected to the discharge port of the air compressor 12. The intermediate air duct 13, the radiator 14 having the other end of the intermediate air duct 13 connected to the inlet, and the exhaust air duct 15 having one end connected to the outlet of the radiator 14 are provided.

  One end of the air supply duct 11 is configured as an air intake port 11a. This air intake port 11a is opened to the engine room 2a. More specifically, the air intake port 11a is opened near the engine 3 in the engine room 2a. A large-diameter duct portion 16 is formed in the middle of the air supply duct 11. The large-diameter duct portion 16 is disposed along the outer periphery of the exhaust pipe 4 of the engine 3. In the large-diameter duct portion 16, as shown in FIG. 2, radiating fins 17 having high thermal conductivity extending from the outer periphery of the exhaust pipe 4 are arranged radially.

  The air compressor 12 compresses the air sucked from the air intake port 11a and discharges it as high-temperature and high-pressure air.

  The radiator 14 is disposed in the air conditioning passage 21 in the air conditioning case 20 and exchanges heat between the high-temperature and high-pressure air discharged from the air compressor 12 and the air blown through the air conditioning passage 21. The configuration within the air conditioning case 20 will be described below.

  The exhaust air duct 15 has an air exhaust port (not shown) at the other end, and the air exhaust port is opened outside the vehicle compartment. Further, the exhaust air duct 15 is provided with an air restricting portion 18 for reducing the pressure of the air discharged from the radiator 14.

  The air conditioning case 20 is disposed, for example, inside the instrument panel. In the air conditioning passage 21 in the air conditioning case 20, the ratio of the blower 22 that sucks in the inside air or the outside air, the above-described radiator 14, the amount of air that passes through the radiator 14 and the amount of air that bypasses the radiator 14 is adjusted. An air distribution door 23 is provided. At the most downstream side of the air conditioning passage 21, there are provided a foot outlet 25 that is opened and closed by a foot door 24, a defroster outlet 27 that is opened and closed by a defroster door 26, and a vent outlet 29 that is opened and closed by a vent door 28. ing. The foot air outlet 25, the defroster air outlet 27, and the vent air outlet 29 are each opened in the passenger compartment 2b at desired positions.

  In the above configuration, when the heating mode is selected, the air compressor 12 is driven. Then, air in the engine room 2a is sucked into the air compressor 12 through the air intake duct 11 from the air intake port 11a, and the sucked air is converted into high-temperature and high-pressure air by compression. This high-temperature and high-pressure air flows in the radiator 14 through the intermediate air duct 13, and then is discharged from the air exhaust port (not shown) through the exhaust air duct 15.

  On the other hand, when the heating mode is selected, the blower 22 is driven together with the air compressor 12. By driving the blower 22, the inside air or the outside air is sucked into the air conditioning passage 21, and the sucked air flows through the air conditioning passage 21. Among the blown air that passes through the radiator 14 (in FIG. 1, the setting is such that all the blown air passes through the radiator 14), heat is exchanged with the high-temperature and high-pressure air in the radiator 14 to become hot air. The warm air that has passed through the radiator 14 is blown into the passenger compartment 2b from any one of the three outlets 25, 27, and 29, thereby warming the passenger compartment 2b.

  In the above operation, since the air compressor 12 creates high-temperature and high-pressure air by compression, high-temperature and high-pressure air is discharged from the air compressor 12 at the start of driving. Then, the air passing through the radiator 14 is heated by the high-temperature and high-pressure air to be heated into the passenger compartment 2b. Accordingly, the warm air is immediately introduced into the passenger compartment 2b at the start of driving of the air compressor 12, that is, from the start of heating, and the warmth is excellent.

  Moreover, compared with the case where the high-temperature and high-pressure air itself discharged from the air compressor 12 is led into the passenger compartment 2b, it is excellent in the cleanliness and quietness of blowing. Furthermore, since the warm air heat-exchanged by the radiator 14 is guided into the vehicle compartment 2b, the blower 22 can freely adjust the blowing power and there is no need for pressure adjustment in the vehicle compartment 2b.

  In the first embodiment, the air intake port 11a is opened in the engine room 2a. Therefore, when the interior of the engine room 2a is warmed by driving the engine 3, the warm air is taken into the air compressor 12, so that the heating performance is improved. In particular, in this embodiment, since the air intake port 11a is opened in the vicinity of the engine 3 in the engine room 2a, particularly high-heat air in the engine room 2a can be taken in, so that the heating performance is further improved. To do. The same effect can be obtained even if the air intake port 11a is opened near the exhaust pipe 4 in the engine room 2a.

  In the first embodiment, the air duct 11 that guides the air taken in from the air intake port 11 a is disposed along the outer periphery of the exhaust pipe 4 of the engine 3. Therefore, when high-temperature exhaust flows through the exhaust pipe 4 by driving the engine 3, the air taken in from the air intake port 11a is heated by the exhaust heat, so that the heating performance is improved.

  In the first embodiment, the air duct arranged along the outer periphery of the exhaust pipe 4 is in the range from the air intake port 11 a to the air compressor 12, that is, the air supply air duct 11. Therefore, since the air compressor 12 compresses the air heated by the exhaust heat of the exhaust pipe 4, the heating performance is improved. An intermediate air duct 13 that connects the air compressor 12 and the radiator 14 may be disposed along the outer periphery of the exhaust pipe 4.

  In the first embodiment, in the large-diameter duct portion 16 of the air supply air duct 11, heat radiation fins 17 having high thermal conductivity extending from the outer periphery of the exhaust pipe 4 are arranged. Therefore, the exhaust heat of the engine 3 is efficiently transmitted to the air taken in from the air intake port 11a, which contributes to improving the heating performance.

  In the first embodiment, the exhaust air duct 15 is provided with an air restrictor 18. Therefore, the high-pressure air that has flowed through the radiator 14 is not discharged outside the passenger compartment in a high pressure state, but is discharged outside the passenger compartment after being reduced to a low pressure by the air restrictor 18. .

(Second Embodiment)
FIG. 3 is a schematic configuration diagram of a vehicle air conditioner according to a second embodiment of the present invention.

  As shown in FIG. 3, the vehicle air conditioner 10 </ b> B of the second embodiment has an engine exhaust intake duct 30 attached to the air supply air duct 11 as compared with that of the first embodiment. Has been. The engine exhaust intake duct 30 is configured to take a part of the exhaust of the engine 3 into the air supply air duct 11.

  Since other configurations are the same as those of the first embodiment, the same reference numerals are given to the same components and the description thereof is omitted.

  Also in the second embodiment, as in the first embodiment, the warm air is immediately introduced into the passenger compartment 2b from the start of heating, and is excellent in immediate warming.

  In the second embodiment, the supply air duct 11 is configured to take in the exhaust of the engine 3. Accordingly, since the exhaust heat of the engine 3 can be directly used, the heating performance is improved.

(Third embodiment)
FIG. 4 is a schematic configuration diagram of a vehicle air conditioner according to a third embodiment of the present invention.

  As shown in FIG. 4, the vehicle air conditioner 10 </ b> C of the third embodiment is not provided with an air throttling portion in the exhaust air duct 15 as compared with that of the first embodiment. Instead, an expander 31 is provided at an air exhaust port (not shown) of the exhaust air duct 15. The expander 31 has a rotating body 31 a that is rotated by exhaust air, and the rotation of the rotating body 31 a is transmitted to the power source 32 of the air compressor 12.

  Since other configurations are substantially the same as those of the first embodiment, the same reference numerals are given to the same components and the description thereof is omitted.

  Also in the third embodiment, similarly to the first embodiment, the warm air is immediately introduced into the passenger compartment 2b from the start of heating, and is excellent in immediate warming property.

  In the third embodiment, power is recovered from the exhausted air that has passed through the radiator 14, and the recovered power is supplied to the air compressor 12. Therefore, since the rotational power of the air compressor 12 can be reduced, power saving can be achieved.

(Fourth embodiment)
FIG. 5 is a schematic configuration diagram of a vehicle air conditioner according to a fourth embodiment of the present invention.

  As shown in FIG. 5, the vehicle air conditioner 10D according to the fourth embodiment includes a rotating body 33 that rotates by the exhaust pressure of the engine 3 and the rotating body, as compared with the third embodiment. A supercharging unit 34 that is rotated by 33 and supercharges air taken into an air intake (not shown) is provided. That is, the air taken into the air intake port can be supercharged by the exhaust pressure of the exhaust pipe 4.

  Since other configurations are substantially the same as those of the third embodiment, the same reference numerals are given to the same components and the description thereof is omitted.

  Also in the fourth embodiment, similarly to the first embodiment, the warm air is immediately introduced into the passenger compartment 2b from the start of heating, and is excellent in immediate warming property.

  In the fourth embodiment, as in the third embodiment, the power is recovered from the exhaust air that has passed through the radiator 14, and the recovered power is supplied to the air compressor 12. Since the rotational power of the air compressor 12 can be reduced, power saving can be achieved.

  Moreover, in the fourth embodiment, the air taken into the air intake port is supercharged by the exhaust pressure of the exhaust pipe 4. Therefore, since the compression power of the air compressor 12 can be reduced, power saving can be achieved.

(Other)
In each of the embodiments described above, only the radiator 14 is disposed in the air conditioning passage 21, but a heater core that circulates engine cooling water is also disposed, and if the radiator 14 and the heater core are used in combination, a greater heating effect is exhibited. can do.

  In each of the above-described embodiments, only the radiator 14 is disposed in the air conditioning passage 21. However, if an evaporator is disposed, the vehicle air conditioner can be cooled together with heating and is excellent in immediate warming during heating. Can provide.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic block diagram of the air conditioning apparatus for vehicles which shows the 1st Embodiment of this invention. FIG. 2 shows the first embodiment of the present invention and is a cross-sectional view taken along line AA of FIG. 1. It is a schematic block diagram of the air conditioning apparatus for vehicles which shows the 2nd Embodiment of this invention. It is a schematic block diagram of the air conditioning apparatus for vehicles which shows the 3rd Embodiment of this invention. It is a schematic block diagram of the air conditioning apparatus for vehicles which shows the 4th Embodiment of this invention.

Explanation of symbols

2a Engine room 2b Car compartment 3 Engine 4 Exhaust pipe 10A to 10D Air conditioner for vehicle 11 Air duct for air supply (air duct)
11a Air intake 12 Air compressor 14 Radiator 15 Exhaust air duct (air duct)
17 Radiation fin 18 Air restrictor

Claims (9)

  An air compressor (12) that compresses air sucked from the air intake (11a) and discharges it as high-temperature and high-pressure air, and high-temperature and high-pressure air discharged from the air compressor (12) and the vehicle compartment (2b) A vehicle air conditioner (1A) to (1D) comprising a heat radiator (14) for exchanging heat with the air blown into the interior to make the air blown into warm air. The vehicle air conditioner (1A) to (1D) according to claim 1,
The vehicle air conditioner (1A) to (1D), wherein the air intake (11a) is opened in the engine room (3). The vehicle air conditioner (1A) or (1B) according to claim 1 or 2,
The air duct (11) for guiding the air taken in from the air intake (11a) is disposed along the outer periphery of the exhaust pipe (4) of the engine (3). 1A), (1B). The vehicle air conditioner (1A), (1B) according to claim 3,
The air duct (11) disposed along the outer periphery of the exhaust pipe (4) is in a range from the air intake (11a) to the air compressor (12). Air conditioner (1A), (1B). The vehicle air conditioner (1A) or (1B) according to claim 3 or 4,
In the air duct (11), heat radiation fins (17) having high thermal conductivity extending from the outer periphery of the exhaust pipe (4) are arranged. 1B). The vehicle air conditioner (1A), (1B) according to any one of claims 1 to 5,
The air conditioner for vehicles (1A), (1B), wherein an air restrictor (18) is provided in the air duct (15) downstream of the radiator (14). The vehicle air conditioner (1B) according to any one of claims 1 to 6,
The vehicle air conditioner (1B), wherein the air duct (11) is configured to take in the exhaust of the engine (3). The vehicle air conditioner (1C), (1D) according to any one of claims 1 to 7,
Vehicle air conditioners (1C) and (1D), wherein power is recovered from the exhausted air that has passed through the radiator (14), and the recovered power is supplied to the air compressor (12). The vehicle air conditioner (1D) according to any one of claims 1 to 8,
A vehicle air conditioner (1D) characterized in that the air taken into the air inlet is supercharged by the exhaust pressure of the exhaust pipe (4).

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