JP2009046043A - Air conditioner for bus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a bus capable of reducing an installation man-hour to bearing surfaces of a plurality of heat exchangers. <P>SOLUTION: In the air conditioner for the bus, two evaporators 3 having cores 32 comprising a plurality of tubes 31 in which coolants flow and side plates 34 provided at both ends of the cores 32, extending in parallel to the longitudinal direction of the tube 31 and reinforcing the cores 32 are mounted to the roof of a bus vehicle. The two evaporators 3 are arranged so that the cores 32 are opposed to each other, and a bracket 10 having a first fixing part 101 for fixing the side plates 34 opposed to the adjacent evaporators 3 is provided. A second fixing part 102 for fixing the bracket 10 to the bearing surface 9 at the lower side of the two evaporators 3 is provided at the bracket 10, and the two evaporators 3 are fixed to the bearing surface 9 by the bracket 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bus air conditioner that air-conditions a passenger compartment of a bus.

Conventionally, a bus air conditioner in which a plurality of evaporators are mounted on the roof of a bus vehicle is known (for example, see Patent Document 1).
JP 11-235922 A

  By the way, in the bus air conditioner as described above, as shown in FIG. 3, two evaporators (heat exchangers) J3 are disposed so as to sandwich the air intake port J8. In order to fix these evaporators J3 to the seating surface J9 immediately below the evaporator J3, the following method is employed.

  That is, after assembling the side brackets J10 to the side plates J34 on both sides of the two evaporators J3, the side brackets J10 are fixed to the seating surfaces J9.

  However, in the above method, four assembling steps of assembling the side brackets to the side plates of the two evaporators, and four assembling steps of assembling the four side brackets to the seat surface, that is, a total of eight assembling steps. Since the number of man-hours is required, there is a problem that the manufacturing cost increases.

  An object of this invention is to provide the air conditioner for buses which can reduce the assembly man-hour to the seat surface of a several heat exchanger in view of the said point.

  In order to achieve the above object, in the present invention, a core part (32) composed of a plurality of tubes (31) through which a heat medium flows, and a longitudinal direction of the tube (31) provided at both ends of the core part (32) A plurality of heat exchangers (3) having side plates (34) extending in parallel to reinforce the core portion (32) are bus air conditioners mounted on the roof of a bus vehicle, The exchanger (3) is disposed so that the core portions (32) face each other, and a first fixing portion (a first fixing portion for fixing the opposing side plates (34) of the adjacent heat exchangers (3)). 101) having a mounting member (10), the mounting member (10) being a second fixing for fixing the mounting member (10) to the lower seating surface (9) of the plurality of heat exchangers (3). Part (102) and a plurality of heat exchangers (3) It is characterized in that it is fixed to the seat surface (9) by wood (10).

  According to this, by fixing the first fixing portion (101) of the mounting member (10) to the opposing side plate (34) of the adjacent heat exchanger (3), a plurality of heat exchangers are integrated, Thereafter, by fixing the second fixing portion (102) of the mounting member (10) to the seat surface (9), the plurality of integrated heat exchangers (3) can be assembled to the seat surface (9). .

  For this reason, for example, when two heat exchangers (3) are assembled to the seating surface (9), the opposing side plates (34) are connected to the side plates (34) on both sides of the two heat exchangers (3). Thus, the two assembly steps of assembling the attachment members (10) and the two assembly steps of assembling the two attachment members (10) to the seat surface (9), respectively, may be performed in total. Therefore, the assembly man-hour can be halved compared with the conventional case. Therefore, it becomes possible to reduce the number of assembling steps to the seating surfaces of the plurality of heat exchangers.

  In the bus air conditioner having the above characteristics, the ceiling of the bus vehicle is provided with an air intake (8) for taking in air in the passenger compartment, and the heat exchanger (3) is provided with the air intake (8). One may be arranged on both sides of the frame.

  Further, in the bus air conditioner having the above characteristics, the heat exchanger may be an evaporator (3) that evaporates the refrigerant and cools the air flowing in the passenger compartment.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram showing a bus air conditioner according to the present embodiment.

  As shown in FIG. 1, the air conditioner for buses of this embodiment includes a package unit 1 that integrally accommodates functional parts of a refrigeration cycle excluding a refrigerant compressor (not shown). It is mounted on the roof of a bus vehicle. A refrigerating cycle is a well-known thing used for the air conditioner for buses, a refrigerant compressor, a condenser 2, a receiver (not shown), a dryer (not shown), an expansion valve (not shown), and an evaporator It consists of 3 functional parts. The refrigerant compressor is disposed under the rear floor of the bus vehicle and is driven by a travel engine (not shown).

  The package unit 1 includes a condensing unit 4 that houses the condenser 2 and a cooling unit 5 that houses the evaporator 3. The condensing unit 4 includes a condenser 2 and a fan 6 that blows outside air to the condenser 2.

  The cooling unit 5 includes two evaporators 3, a blower 7 that blows the inside air (air in the passenger compartment) to the evaporator 3, and the like. The air blown to the evaporator 3 by the blower 7 is cooled by heat exchange with the low-temperature refrigerant when passing through the evaporator 3, supplied to a cold air duct (not shown) in the passenger compartment, and provided in the cold air duct. The air is blown out into the passenger compartment through the air outlet (not shown). In addition, an air intake port 8 formed in, for example, a rectangular shape is opened at the ceiling of the bus vehicle on which the cooling unit 5 is disposed, and the vehicle interior and the inside of the unit communicate with each other. When the blower 7 is activated, the air in the passenger compartment is introduced into the unit through the air intake 8 and blown to the evaporator 3. The evaporator 3 corresponds to the heat exchanger of the present invention, and the refrigerant corresponds to the heat medium of the present invention.

  FIG. 2 is an exploded perspective view showing a part A of FIG. In FIG. 2, the air intake 8 is not shown. As shown in FIG. 2, the evaporator 3 includes a plurality of tubes that extend in a direction perpendicular to the longitudinal direction of the tube 31 at both ends in the longitudinal direction of the tube 31 and a core portion 32 composed of a plurality of tubes 31 through which refrigerant flows. 2, header tanks 33 that communicate with 2, and side plates 34 that are provided at both ends of the core portion 32 and extend parallel to the longitudinal direction of the tube 31 to reinforce the core portion 32.

  In the present embodiment, the tubes 31 are formed in a flat shape so that the air flow direction coincides with the major axis direction, and a plurality of tubes 31 are arranged in parallel in the horizontal direction so that the longitudinal direction thereof coincides with the vertical direction. ing. The side plate 34 has a surface substantially parallel to the flat surface of the tube 31 and extends substantially parallel to the longitudinal direction of the tube 31. The side plate 34 extends from both ends of the base portion 341 in the air flow direction to the base portion 341. It has a pair of ribs 342 that protrude in a direction substantially perpendicular to the tube (tube stacking direction) and extend substantially parallel to the tube longitudinal direction.

  In the present embodiment, two evaporators 3 are provided, and the two evaporators 3 are arranged so that the core portions 32 face each other. The two evaporators 3 are fixed to a seating surface 9 immediately below these evaporators 3. Specifically, two evaporators 3 are arranged one on each side of the seating surface 9 across the air intake 8. In the present embodiment, an inner wall surface of a case (cooling unit 5) that houses the evaporator 3 is employed as the seating surface 9.

  As shown in FIGS. 1 and 2, the bracket 10 is assembled to the side plate 34 of the evaporator 3. More specifically, the bracket 10 has a first fixing portion 101 that connects the ribs 342 of the opposing side plates 34 of the two evaporators 3. The first fixed portion 101 has a substantially U-shaped cross section viewed from the vertical direction. In addition, the bracket 10 has a second fixing portion 102 for fixing the bracket 10 to the seating surface 9. The second fixing portion 102 is formed in a planar shape that is substantially parallel to the seating surface 9. The bracket 10 corresponds to the mounting member of the present invention.

  Next, a method for assembling the evaporator 3 to the seating surface 9 in this embodiment will be described. First, the first fixing portions 101 of the bracket 10 are fixed to the side plates 34 on both sides in the tube stacking direction of the two evaporators 3 by fastening means such as bolts 105, respectively. Thereby, the two evaporators 3 are integrated. Subsequently, after the two integrated evaporators 3 are arranged in the cooling unit 5, the second fixing portion 102 of the bracket 10 is fixed to the seat surface 9 by fastening means such as a bolt 105. Thereby, the two evaporators 3 are fixed to the seating surface 9.

  As described above, in this embodiment, by fixing the first fixing portion 101 of the bracket 10 to the opposite side plates 34 of the two evaporators 3, a plurality of heat exchangers are integrated, and then the bracket 10 By fixing the two fixing portions 102 to the seat surface 9, the two integrated evaporators 3 can be assembled to the seat surface 9.

  Therefore, when the two evaporators 3 are assembled to the seating surface 9 as in the present embodiment, two evaporators 3 and two brackets 10 are prepared, and the side plates 34 on both sides of the two evaporators 3 are opposed to each other. A total of four assembling steps including two assembling steps for fixing the brackets 10 so as to connect the side plates 34 to be connected to each other and two assembling steps for fixing the two brackets 10 to the seating surface 9. Therefore, the number of assembling steps can be halved compared to the conventional case. Furthermore, since the layout in the cooling unit 5 can be simplified, the appearance in the cooling unit 5 can be improved.

  By the way, in the conventional assembling method, the bracket for assembling the evaporator 3 to the seating surface 9 is required twice as many as the number of the evaporators 3, and there is a problem that the number of parts increases. On the other hand, in the present embodiment, the number of brackets 10 can be the same as the number of the evaporators 3 (two in the present embodiment), so the number of parts can be reduced.

(Other embodiments)
In the above embodiment, the example in which the two evaporators 3 are assembled to the seating surface 9 has been described. However, the present invention is not limited to this, and the number of the evaporators 3 may be three or more.

  Moreover, although the said embodiment demonstrated the example which has arrange | positioned the evaporator 3 one each on both sides on both sides of the air intake port 8, not only this but it can arrange | position in arbitrary places.

  Moreover, in the said embodiment, although the inner wall surface of the case which accommodates the evaporator 3 is employ | adopted as the seat surface 9, you may employ | adopt not only this but a metal plate (for example, iron plate).

  Moreover, in the said embodiment, although the evaporator 3 is employ | adopted as a heat exchanger, it is not restricted to this, You may employ | adopt various heat exchangers, such as a capacitor | condenser and a heater core unit.

It is a mimetic diagram showing the air-conditioner for buses concerning the embodiment of the present invention. It is a disassembled perspective view which shows the A section of FIG. It is a schematic diagram which shows the conventional bus air conditioner.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 3 ... Evaporator (heat exchanger), 8 ... Air intake, 9 ... Seat surface, 10 ... Bracket (mounting member), 31 ... Tube, 32 ... Core part, 34 ... Side plate, 101 ... 1st fixing part, 102 ... 2nd fixing | fixed part.

Claims (3)

A core portion (32) composed of a plurality of tubes (31) through which a heat medium flows, and provided at both ends of the core portion (32) and extending in parallel with the longitudinal direction of the tube (31), the core portion (32). A plurality of heat exchangers (3) having a side plate (34) that reinforces the air conditioner for a bus mounted on the roof of the bus vehicle,
The plurality of heat exchangers (3) are arranged so that the core portions (32) face each other,
An attachment member (10) having a first fixing portion (101) for fixing the opposing side plates (34) of the adjacent heat exchangers (3);
The mounting member (10) has a second fixing portion (102) for fixing the mounting member (10) to a lower seating surface (9) of the plurality of heat exchangers (3). ,
The air conditioner for buses, wherein the plurality of heat exchangers (3) are fixed to the seating surface (9) by the mounting member (10). The ceiling of the bus vehicle is provided with an air intake (8) for taking in air in the passenger compartment,
2. The air conditioner for buses according to claim 1, wherein the heat exchanger (3) is arranged one on each side across the air intake (8). The bus air conditioner according to claim 1 or 2, wherein the heat exchanger is an evaporator (3) that evaporates the refrigerant and cools the air flowing in the passenger compartment.

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