JP2002053038A - Air conditioner for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for rolling stock capable of keeping the inside of a room comfortable even when an external temperature is high. SOLUTION: This air conditioner 10 for the rolling stock for cooling and ventilating air in the car 1 comprises a circulating part 30 for recovering circulating air R in the car 1, a fresh air intake part for taking in the fresh air N outside the car 1, an auxiliary heat exchanger 42 for cooling the fresh air N, a main heat exchanger 43 for cooling mixture M of the circulating air R and the cooled fresh air N, and an indoor blower 44 for blowing the mixture M cooled by the main heat exchanger 43 into the car 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle installed in a vehicle, and more particularly to an air conditioner for a vehicle in which indoor circulating air is supplied into a room through a body duct by an indoor blower of the air conditioner.

[0002]

2. Description of the Related Art In railcars such as Shinkansen trains, as the speeding up of trains requires lowering the center of gravity and weight of the trains, an air conditioning system in which one or two air conditioners are installed under the floor is employed. ing. In such an air conditioning system,
All the heat load is absorbed by the indoor circulating wind, and the indoor circulating air is carried to the air conditioner through the circulation duct and removed in the heat exchanger.

On the other hand, in order to maintain a uniform temperature balance in the room and improve passenger comfort, it is necessary to maintain a balance in the amount of air blown into the room. The indoor circulation wind is sent out from an air conditioner installed under the floor by an indoor blower, and supplied to the room through a long vehicle body duct. In order to maintain the air volume balance in a long body duct, it is necessary to secure a certain amount of circulating air volume,
For example, in a Shinkansen vehicle, 100 m ³ / min or more is required.

[0004]

The vehicle air conditioner described above has the following problems. That is, for example, when the outside air temperature is 40 ° C., the indoor temperature is 26 ° C.
, A cooling capacity of 58,000 kcal / h and a circulating air volume of 130 m ³ / min are required. 1
In order to generate a circulating air volume of 30 m ³ / min, a large indoor blower is required, and the vibration and noise of the indoor blower propagates indoors, the wind noise of the circulating wind increases, the wind hitting the passengers increases, and the like. There is a possibility that indoor comfort may be impaired.

On the contrary, if the circulating air volume of the indoor blower is reduced in consideration of noise and vibration, it becomes impossible to secure the cooling capacity of the air conditioner which can cope with the cooling load required when the outside air temperature is high. The temperature rises and impairs indoor comfort.

Accordingly, an object of the present invention is to provide an air conditioner for a vehicle which can keep the room comfortable even when the outside air temperature is high.

[0007]

Means for Solving the Problems To solve the above problems and achieve the object, a vehicle air conditioner of the present invention is configured as follows.

(1) In a vehicle air conditioner for cooling and ventilating the air in a vehicle, an air circulating unit for collecting circulating air in the vehicle and a fresh air intake unit for taking in fresh air outside the vehicle. An auxiliary cooling unit for cooling the fresh air,
A main cooling unit that cools an air-fuel mixture in which the circulating air and the cooled fresh air are mixed; and a blowing unit that blows the air-fuel mixture cooled by the main cooling unit into the vehicle. It is characterized by the following.

(2) In an air conditioner for a vehicle that cools and ventilates air in a vehicle, an air circulating unit that collects circulating air in the vehicle, and a fresh air intake unit that takes in fresh air outside the vehicle. An auxiliary cooling unit for cooling the circulating air,
A main cooling unit that cools an air-fuel mixture in which the fresh air and the cooled circulating air are mixed; and a blowing unit that blows the air-fuel mixture cooled by the main cooling unit into the vehicle. It is characterized by the following.

(3) In an air conditioner for a vehicle that cools and ventilates air in a vehicle, an air circulating unit that collects circulating air in the vehicle, and a fresh air intake unit that takes in fresh air outside the vehicle. An auxiliary cooling unit for cooling an air-fuel mixture in which the circulating air and the fresh air are mixed, a main cooling unit for cooling the air-fuel mixture cooled to the first temperature, and cooling in the main cooling unit. A blower for blowing the mixture into the vehicle.

[0011]

FIG. 1 is a schematic diagram showing a railway vehicle 1 in which a vehicle air conditioner 10 according to a first embodiment of the present invention is incorporated. In addition, 2 in FIG. 1 shows the room of the railway vehicle 1.

The vehicle air conditioner 10 includes a ventilation section 20 for taking in fresh air N outside the vehicle 1, a circulating section 30 for collecting circulating air R in the room 2, and a cooling section for cooling fresh air N and the mixture M. 40.

The ventilation unit 20 includes a housing 21 through which fresh air N flows, and a ventilation port 2 provided in the housing 21.
2, a ventilation blower 23 for sending out fresh air N taken in from the ventilation opening 22, and a connection duct 24 for supplying the sent out fresh air N to a housing 41 described later. Note that W indicates exhaust.

The circulating section 30 collects circulating air R inside the vehicle from a circulating hole 31 provided in the room 2 and
The circulation duct 32 is provided between the auxiliary heat exchanger 42 and the main heat exchanger 43 described below.

The cooling section 40 includes a housing 41 through which air flows, an auxiliary heat exchanger 42 disposed in the housing 41, and a main heat exchanger 43 disposed downstream of the auxiliary heat exchanger 42. And an indoor blower 44 for sending out the air cooled by the main heat exchanger 43, and an indoor blower 4
And a blow duct 45 for supplying the air sent out by the blower 4 to the room 2.

The vehicle air conditioner 10 constructed as described above.
Works as follows. It is assumed that the outside air temperature is 40 ° C. and the indoor temperature is 26 ° C., and the vehicle 1 is a 700 series Shinkansen train. In this case, the required cooling capacity is 58,000 kc
al / h. The maximum cooling capacity of the main heat exchanger 43 is 40000 kcal / h, and the maximum cooling capacity of the auxiliary heat exchanger 42 is 18000 kcal / h.

The fresh air N introduced from the ventilation port 22
(40 ° C./30 m ³ / min) is 50
° C. ^· In 30 m 3 / min, is fed into the housing 41 through the connecting duct 24. The fresh air N supplied into the housing 41 is cooled to 26 ° C. by the auxiliary heat exchanger 42.

On the other hand, from the circulation duct 32 to the auxiliary heat exchanger 4
Circulating air R (26 ° C./70 m ³ /
min) is mixed with fresh air N cooled to 26 ° C. to become a mixture M (26 ° C./100 m ³ / min).

The mixture M is cooled to 11 ° C. by the main heat exchanger 43. A cooled mixture M (11 ° C, 100m
³ / min) is supplied to the room by an indoor blower 44 via a blower duct 45. The temperature of the air-fuel mixture M is about 22 ° C. at the time when the air-fuel mixture M is supplied to the room 2 due to the effect of the adiabatic compression by the indoor blower 44 and the heat transfer in the blower duct 45.

As described above, in the vehicle air conditioner 10 according to the present embodiment, even when the outside air temperature is high, the room temperature of the vehicle 1 can be comfortably maintained while the cooling capacity of the main heat exchanger 43 is maintained. Temperature can be kept.

Therefore, it is not necessary to increase the size of the indoor blower 44 in order to keep the temperature of the room 2 constant.
The vibration and noise of the indoor blower do not propagate into the room, the wind noise of the wind does not increase, and the wind hitting the passenger does not increase. Therefore, the comfort of the room 2 can be maintained.

When the outside air temperature is low (for example, 25 ° C. or less), it is preferable to stop the operation of the auxiliary heat exchanger 42 to prevent the main heat exchanger 43 from being frosted.

FIG. 2 is a schematic view showing a railway vehicle 1 in which a vehicle air conditioner 50 according to a second embodiment of the present invention is incorporated. In FIG. 2, the same components as those in FIG.

The vehicle air conditioner 50 includes a ventilator 60 for taking in fresh air N outside the vehicle 1, a circulating unit 70 for collecting circulating air R in the room 2, and a cooling unit for cooling fresh air N and the mixture M. 80.

The ventilation section 60 includes a housing 61 through which fresh air N flows, and a ventilation port 6 provided in the housing 61.
2, a ventilation blower 63 for sending out fresh air N introduced from the ventilation opening 62, and a connection duct 64 for supplying the sent out fresh air N to a housing 81 described later. Note that W indicates exhaust.

The circulating section 70 collects the circulating air R inside the vehicle from the circulating holes 71 provided in the room 2 and supplies the circulating duct 72 to the upstream side of an auxiliary heat exchanger 74 described later.
And a housing 73 through which the circulating air R flows, an auxiliary heat exchanger 74 disposed in the housing 73, and a connection duct 75 for supplying the circulating air R cooled by the auxiliary heat exchanger 74 to the housing 81. And

The cooling unit 80 includes a housing 81 through which air flows, a main heat exchanger 82 disposed in the housing 81, and an indoor blower 83 that sends out the air cooled by the main heat exchanger 82. An air blower duct 84 is provided for supplying the air blown out by the indoor blower 83 to the room 2.

The vehicle air conditioner 50 thus configured
Works as follows. It is assumed that the outside air temperature is 40 ° C. and the indoor temperature is 26 ° C., and the vehicle 1 is a 700 series Shinkansen train. In this case, the required cooling capacity is 58,000 kc
al / h. The maximum cooling capacity of the main heat exchanger 82 is 40000 kcal / h, and the maximum cooling capacity of the auxiliary heat exchanger 74 is 18000 kcal / h.

Fresh air N introduced from the ventilation port 62
(40 ° C./30 m ³ / min) is 50
° C. ^· In 30 m 3 / min, is fed into the housing 81 through the connecting duct 64.

On the other hand, the auxiliary heat exchanger 7
4 (26 ° C./70 m ³ /
min) is cooled to 13 ° C. by the auxiliary heat exchanger 74 and supplied into the housing 81 through the connection duct 75.

The fresh air N supplied into the housing 81
(50 ℃ ・ 30m³/ Min) and circulating air R (13 ° C.7)
0m³/ Min) and a mixture M (26 ° C./1)
00m ³/ Min).

The mixture M is cooled to 11 ° C. by the main heat exchanger 82. A cooled mixture M (11 ° C, 100m
³ / min) is supplied to the room 2 by the indoor blower 83 via the blower duct 84. The temperature of the air-fuel mixture M is about 22 ° C. at the time when the air-fuel mixture M is supplied into the room 2 due to the effect of the adiabatic compression by the indoor blower 83 and the heat transfer in the air duct 84.

As described above, also in the vehicle air conditioner 50 according to the present embodiment, the same effects as those of the vehicle air conditioner 10 according to the above-described first embodiment can be obtained.

FIG. 3 is a schematic diagram showing a railway vehicle 1 in which a vehicle air conditioner 90 according to a third embodiment of the present invention is incorporated. In FIG. 3, the same reference numerals are given to the same functional portions as those in FIG.

The vehicle air conditioner 90 includes a ventilator 20 for taking in fresh air N outside the vehicle 1, a circulating unit 100 for collecting circulating air R in the room 2, and a cooling unit for cooling fresh air N and the mixture M. 40.

The circulating section 100 includes a circulating duct 102 for collecting circulating air R inside the vehicle from a circulating hole 101 provided in the room 2, a housing 103 through which the circulating air R flows, and a connection duct 104. I have.

The vehicle air conditioner 90 thus configured
Works as follows. It is assumed that the outside air temperature is 40 ° C. and the indoor temperature is 26 ° C., and the vehicle 1 is a 700 series Shinkansen train. In this case, the required cooling capacity is 58,000 kc
al / h. The maximum cooling capacity of the main heat exchanger 43 is 40000 kcal / h, and the maximum cooling capacity of the auxiliary heat exchanger 42 is 18000 kcal / h.

Fresh air N taken in from the ventilation port 22
(40 ° C./30 m ³ / min) is 50
° C. ^· In 30 m 3 / min, is fed into the housing 41 through the connecting duct 24.

On the other hand, the circulating air R (26 ° C./70 m ³ / min) supplied from the circulation duct 102 is
03, and is supplied into the housing 41 through the connection duct 104.

The fresh air N supplied into the housing 41
(50 ℃ ・ 30m³/ Min) and circulating air R (26 ° C.7)
0m³/ Min) and a mixture M (33 ° C./1)
00m ³/ Min).

After the air-fuel mixture M is cooled to 26 ° C. by the sub heat exchanger 42, it is further cooled to 11 ° C. by the main heat exchanger 43. A cooled mixture M (11 ° C, 100m
³ / min) is supplied to the room by an indoor blower 44 via a blower duct 45. The temperature of the air-fuel mixture M is about 22 ° C. at the time when the air-fuel mixture M is supplied to the room 2 due to the effect of the adiabatic compression by the indoor blower 44 and the heat transfer in the blower duct 45.

As described above, the same effects as those of the vehicle air conditioner 10 according to the first embodiment can be obtained in the vehicle air conditioner 90 according to the present embodiment.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0044]

According to the present invention, it is possible to keep the room comfortable even when the outside air temperature is high.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a vehicle in which a vehicle air conditioner according to a first embodiment of the present invention is incorporated.

FIG. 2 is a schematic view showing a vehicle in which a vehicle air conditioner according to a second embodiment of the present invention is incorporated.

FIG. 3 is a schematic diagram showing a vehicle in which a vehicle air conditioner according to a third embodiment of the present invention is incorporated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Railway vehicle 2 ... Room 10, 50, 90 ... Vehicle air conditioner 20, 60 ... Ventilation part 30, 70, 100 ... Circulation part 40, 80 ... Cooling part 42, 74 ... Auxiliary heat exchanger 43, 82 ... Main Heat exchanger N: fresh air R: circulating air M: mixture W: exhaust

Continued on the front page (72) Inventor Hideaki Higashio 1-4-1 Meieki Station, Nakamura-ku, Nagoya City, Aichi Prefecture Inside Tokai Passenger Railway Co., Ltd. (72) Inventor Toshihiro Koshi 1-1-1 Shibaura, Minato-ku, Tokyo Toshiba Corporation Head Office

Claims (3)

[Claims] An air conditioner for a vehicle that cools and ventilates air in a vehicle, an air circulation unit that collects circulating air in the vehicle, a fresh air intake unit that takes in fresh air outside the vehicle, An auxiliary cooling unit that cools the fresh air, a main cooling unit that cools an air-fuel mixture in which the circulating air and the cooled fresh air are mixed, and the vehicle that cools the air-fuel mixture cooled by the main cooling unit. And a blower that blows air into the inside. 2. A vehicle air conditioner for cooling and ventilating air in a vehicle, comprising: an air circulating unit for collecting circulating air in the vehicle; a fresh air intake unit for taking in fresh air outside the vehicle; An auxiliary cooling unit that cools the circulating air, a main cooling unit that cools an air-fuel mixture in which the fresh air and the cooled circulating air are mixed, and the vehicle that cools the air-fuel mixture cooled by the main cooling unit. And a blower that blows air into the inside. 3. A vehicle air conditioner for cooling and ventilating air in a vehicle, comprising: an air circulating unit for collecting circulating air in the vehicle; a fresh air intake unit for taking in fresh air outside the vehicle; An auxiliary cooling unit that cools an air-fuel mixture in which the circulating air and the fresh air are mixed; a main cooling unit that cools the air-fuel mixture cooled to the first temperature; And a blower for blowing the air-fuel mixture into the vehicle.