JP2008056168A - Heating device for bus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device for a bus capable of performing mild heating of low humidity in one system. <P>SOLUTION: In a vehicle having a luggage compartment space 18 between front wheels and rear wheels, a heater unit 3 for feeding hot air into a cabin space 16 is provided between the cabin space 16 and the luggage compartment space 18, and the heater unit 3 comprises an inside air inlet 3a communicated with the cabin space 16 and an outside air inlet 3b communicated with the luggage compartment space 18. By forming the inside air inlet 3a and the outside air inlet 3b in the heater unit 3 for feeding hot air into the cabin space 16, and taking in the outside air of low humidity from the luggage compartment space 18 in a heating mode, the mild heating can be provided, in which hot air of low humidity can be supplied to a passenger seat in one system. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heating device mounted on a large vehicle such as a bus vehicle.

As a related art related to an air conditioner mounted on a vehicle having a large cabin space such as a bus vehicle, as shown in Patent Document 1 below, a cooling unit that cools a cabin and a heating unit that performs heating are independent. There is something that is. For example, the cooling / heating is performed by a roof-mounted cooler unit having an inside / outside air switching mechanism and a reheat mechanism as a cooling unit, and an indoor air circulation type underfloor heater unit as a heating unit.
JP 2004-284431 A

  In the above-described prior art air conditioning, during heating, hot air is blown out by a heater unit under the floor, outside air is introduced by a rooftop cooler unit, and dehumidified air heated by a reheat mechanism is blown out to air-condition the cabin. . However, there are problems that warm air and dehumidified air blowing are two separate systems, and that mild air conditioning cannot be performed because air mixing cannot be performed well.

  The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a bath heating apparatus that enables mild heating with low humidity in one system.

In order to achieve the above object, the present invention employs technical means described in claims 1 to 5. That is, in the invention according to claim 1, in the vehicle having the luggage compartment space (18) between the front wheel and the rear wheel,
A heater unit (3) for supplying warm air into the cabin space (16) is provided between the cabin space (16) and the luggage compartment space (18).
The heater unit (3) includes an inside air introduction port (3a) communicating with the cabin space (16),
An outside air inlet (3b) communicating with the luggage compartment (18) is provided.

  According to the first aspect of the present invention, the heater unit (3) for supplying warm air into the cabin space (16) is provided with the inside air introduction port (3a) and the outside air introduction port (3b), and the humidity during heating By taking in low outside air through the luggage compartment (18), warm air with low humidity can be blown out to the passenger seat in one system, and mild heating can be provided.

  According to a second aspect of the present invention, in the bus heating device according to the first aspect, the heater unit (3) is configured to switch the open / close air between the internal air introduction port (3a) and the external air introduction port (3b). It is characterized by comprising switching means (34). According to the second aspect of the invention, when it is desired to ensure the maximum heating performance, it is possible to switch to the inside air circulation with the same inside air suction as before.

  According to a third aspect of the present invention, in the bus heating device according to the first or second aspect, the heater unit (3) is disposed below the passenger compartment floor (16a) and in the luggage compartment space (18). It is characterized by being placed above. According to the third aspect of the present invention, the heater unit (3) can be arranged without interfering with the passenger compartment space (16) and the luggage compartment space (18), and the inside air duct (32). The outside air duct (33), the hot air supply duct (37), etc. can be omitted or made short and simple.

  According to a fourth aspect of the present invention, in the bus heating device according to the first or second aspect, the heater unit (3) is arranged in the cabin space (16). According to the fourth aspect of the present invention, the heater unit (3) may be disposed not only under the floor but also under the passenger seat (S) on the floor. At this time, the inside air duct (32) becomes unnecessary, and it becomes possible by connecting the heater unit (3) and the luggage compartment space (18) with the outside air duct (33).

  In the invention according to claim 5, in the bus heating device according to claim 1 or 2, the heater unit (3) is arranged in the luggage compartment space (18). . According to the invention described in claim 5, the heater unit (3) may be arranged in the luggage compartment space (18). At this time, the outside air duct (33) becomes unnecessary, and the heater unit (3) and the cabin space (16) are connected by the inside air duct (32) and the hot air supply duct (37).

  In addition, the code | symbol in the parenthesis as described in a claim and said each means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a perspective view of a bus vehicle showing a schematic configuration of the bus air conditioner according to an embodiment of the present invention in a vehicle mounted state, and FIG. 2 is a perspective view showing a schematic configuration of the cooling unit 1 in FIG. It is a figure and shows the state which removed the cover. 3 is a side perspective view of the bus vehicle in the first embodiment of the present invention, and FIG. 4 is a longitudinal sectional view showing a schematic configuration of the heater unit 3 of the present invention indicated by a broken line circle in FIG.

  This bus air conditioner is mounted on a vehicle having a large cabin space 16 (see FIG. 3) like a bus vehicle, and has a heater unit 3, a driver seat heater unit 21 (see FIG. 3), and a reheating (reheat) function. The cooling unit 1 is provided, and these are combined.

  First, in FIG. 1, the heating device 2 is roughly composed of a heater unit 3 and a hot air duct 4 that forms a flow path of air heated by the heater unit 3. The heater unit 3 divides the cabin space 16 into four zones on the left and right sides, and independently controls the heater units 3 for the respective zones. In addition, since the structure of the heater unit 3 is one of the essential parts of the present invention, details will be described later.

  The hot air duct 4 is arranged on each of the left and right sides of the passenger compartment floor 16a (see FIG. 3) and extends in the longitudinal direction of the vehicle. Each is arranged. Further, the hot air duct 4 is formed with a plurality of hot air outlets 5 that are opened under the respective seats (not shown), and the hot air sent from the heater unit 3 is directed toward the passenger feet in the passenger compartment 16. It blows out (see FIG. 3).

  Next, as shown in FIGS. 2 and 3, the cooling unit 1 is roughly divided into a condenser (refrigerant condenser) 101, an evaporator (a refrigerant evaporator and a heat exchanger for cooling) 113, and a blower (air blowing means). 115, etc., and is arranged on the roof 10 of the bus vehicle as a roof-mounted type in this embodiment.

  The refrigeration cycle constituting the cooling unit 1 is a well-known one used in a vehicle air conditioner, and is composed of two independent left and right cycles. Each cycle is configured by connecting refrigeration equipment such as a compressor (refrigerant compressor) (not shown), a condenser 101, a receiver / dryer / expansion valve (not shown), an evaporator 113, and the like in an annular manner by refrigerant piping.

  The compressor is disposed under the rear floor of the bus vehicle, and is driven from a vehicle travel engine (not shown) via an electromagnetic clutch. The condenser 101 condenses the high-temperature and high-pressure refrigerant compressed by the compressor. The receiver is disposed on the refrigerant outflow side of the capacitor 101, separates the refrigerant flowing out from the capacitor 101 into a liquid phase refrigerant and a gas phase refrigerant, and only outflows the liquid phase refrigerant toward the expansion valve, and the liquid in the container. The amount of refrigerant circulating in the refrigeration cycle is adjusted by storing the refrigerant.

  On the liquid-phase refrigerant outflow side of the receiver, a sight glass (not shown) for viewing the excess or deficiency of the refrigerant and an expansion valve constituting refrigerant decompression means are arranged. This expansion valve is a temperature type, and its opening degree is adjusted according to the refrigerant temperature on the refrigerant outflow side of the evaporator 113.

  Specifically, a temperature sensing cylinder for sensing the refrigerant temperature is arranged on the refrigerant outflow side of the evaporator 113, and the valve opening is increased when the refrigerant temperature (cooling load) is high, and when the refrigerant temperature (cooling load) is low. The valve opening is reduced. An evaporator 113 for evaporating the low-pressure and low-pressure liquid-phase refrigerant is disposed on the refrigerant outflow side of the expansion valve.

  As shown in FIG. 2, the cooling unit 1 includes a condensing unit portion 1 </ b> A and a cooling unit 1 </ b> B united together. The condensing unit section 1A includes a capacitor 101 and an outside air fan 102 that blows outside air to the capacitor 101.

  The cooling unit 1B includes an inside / outside air switching door 112 (see FIG. 3) as an inside / outside air switching means for selectively introducing air in the vehicle interior (inside air) or air outside the vehicle interior (outside air) into the air conditioning case 111, and an evaporator. 113, a reheat heater core (heat exchanger for reheating) 114 that reheats the air that has passed through the evaporator 113, and a blower (blower unit) 115 that blows the introduced air through the evaporator 113 and the reheat heater core 114 and then blows it into the vehicle interior. Etc.

  First, the inside / outside air switching door 112 that switches between inside air and outside air automatically switches between the inside air mode and the outside air mode based on whether or not the outside air is dirty, that is, the output of an outside gas sensor (not shown) that detects the cleanliness of the outside air. Can be switched. And the air ventilated by the blower 115 to the evaporator 113 is cooled by heat exchange with the low-temperature refrigerant when passing through the evaporator 113.

  Similarly to the heater core 35 of the heater unit 3, the reheat heater core 114 is a hot water heater that uses a coolant of a vehicle travel engine (not shown) as a heat source, and a water pump and a flow rate control valve (not shown) from the engine coolant circuit. When cooling water (warm water) is supplied via the air and the air that has passed through the evaporator 113 is dehumidified, heating is performed as necessary.

  And the air which passed the reheat heater core 114 is supplied to the cold wind duct 7 (refer FIG. 1, FIG. 3) in a vehicle interior. The cold air duct 7 is disposed on each of the left and right sides of the vehicle ceiling and extends in the longitudinal direction of the vehicle. A plurality of cold air outlets 8 are formed in the cold air duct 7, from which cold air is blown toward the passenger's head in the cabin space 16. In addition, the blower 115 can switch the air flow rate from a strong wind (Hi) to a weak wind (Lo) and stop at the driver's seat.

  Next, an air conditioner around the driver's seat, which is a part of the air conditioner of the vehicle, will be described with reference to FIG. The driver's seat heating unit 21 has a well-known structure and is installed in the driver's seat front panel 12 of the bus vehicle, and a blower fan and a heater core (not shown) are incorporated therein. The blower fan can switch the amount of blown air between strong wind (Hi) and weak wind (Lo).

  And from the upper part of the heating unit 21 for driver's seats, the defroster duct part 14 for ventilating warm air is extended along the inner surface of the windshield (vehicle front window glass) 13 of a bus vehicle. In addition, a foot duct 15 for blowing warm air is extended from the side of the passenger compartment of the driver seat heating unit 21 toward the feet of the driver D. The operation switch of the driver seat heating unit 21 is provided in the vicinity of the front surface of the driver seat.

  The cold air duct 7 forms an air passage that guides the cold air sent from the cooling unit 1 to each outlet described below. The cold air duct 7 includes a descending duct portion 20 extending downward on the rear side wall side of the driver seat space 17, a ceiling duct portion extending in the front-rear direction of the bus vehicle along the ceiling portion of the driver seat space 17 and the ceiling portion of the passenger compartment space 16. 7 and a side duct portion 22 that extends from the middle of the descending duct portion 20 to the side of the driver's seat space 17.

  The ceiling duct portion 7 has a plurality of cold air outlets 8 opened on the respective seats (not shown) in the ceiling portion of the cabin space 16 and a cold air outlet 24 opened in the ceiling portion of the driver seat space 17. is doing. Moreover, the side duct part 22 has the side face blower outlet 25 opened toward the driver | operator's head side.

  Further, a lower end of the descending duct portion 20 is provided with a driver seat duct 23 extending to the side of the driver seat space 17. The driver's seat duct 23 is led from the ceiling duct portion 7 through the descending duct portion 20 to the driver's seat front panel 12 of the bus vehicle. The driver's seat duct 23 has two left and right face outlets 28 that open toward the head and chest of the driver D on the driver's seat front panel 12. These face outlets 28 are rotatably mounted with movable louvers capable of adjusting the wind direction so as to concentrate on a desired location of the driver D and apply cool air.

  Next, the configuration and structure of the heater unit 3 which is a main part of the present invention will be described with reference to FIGS. As shown in FIG. 4, the heater unit 3 includes a heater core 35 and a blower 36 in a heater case 31 and is disposed below the passenger compartment floor 16 a of the bus vehicle. Further, the bus vehicle of the present embodiment has a luggage compartment space (so-called baggage room) 18 between the front wheels and the rear wheels. In this embodiment, the heater unit 3 is located above the luggage compartment space 18 in the cabin. It arrange | positions in the space between the spaces 16, so-called vehicle duct part space.

  The heater core 35 is a heat exchanger that heats air that passes through cooling water of a vehicle travel engine (not shown) as a heat source. As shown in FIG. 4, the blower 36 sucks hot air heated through the heater core 35 into the scroll casing and generates an air flow toward the hot air duct 4 in the passenger compartment. And a blower motor 36b that rotationally drives the centrifugal multiblade fan 36a.

  Further, on the upstream side of the air flow of the heater core 35 in the heater unit 3, there are an inside air introduction port 3 a that communicates with the cabin space 16 through the inside air duct 32 and an outside air introduction port 3 b that communicates with the luggage compartment space 18 through the outside air duct 33. The inside air introduction port 3a and the outside air introduction port 3b are switched and opened and closed by an inside / outside air switching door (inside / outside air switching means in the present invention) 34. The inside / outside air switching door 34 is driven by an actuator such as a servo motor (not shown), and the servo motor is controlled by an air conditioning control device (not shown).

  The air flow upstream end of the inside air duct 32 opens to the passenger compartment floor 16a, and the air flow upstream end of the outside air duct 33 opens to the luggage compartment ceiling 18a. 18b is provided so as not to be affected by water from under the vehicle, and communicates with the underfloor space, and communicates with the outside of the vehicle.

  Next, the operation of the bus air conditioner of this embodiment will be briefly described with reference to FIGS. When an air conditioner automatic operation switch on an operation panel (not shown) is pressed and the vehicle interior temperature is set to a desired set temperature with the indoor set temperature adjustment switch, the fan of the cooling unit 1 or the heater unit 3 rotates, and the air conditioning of the vehicle interior space is performed. Done. At this time, for example, when the room temperature is higher than the set temperature set by the driver D, cold air is blown out from the cooling unit 1 to the cold air duct 7 in order to perform cooling.

  Then, the cold air that has flowed into the cold air duct 7 passes through the ceiling duct portion 7 and is blown out from the cold air outlets 8 and 24 toward the passenger's passenger's head chest and driver seat space 17. Further, the cold air flowing into the cold air duct 7 is blown out from the side face air outlet 25 and the face air outlet 28 through the descending duct portion 20, the side duct portion 22, and the driver seat duct 23, so that the driver's seat space 17. The head and chest of driver D inside is cooled.

  Further, when the outside air temperature is low, warm air is blown out from the heater unit 3 to the warm air duct 4 for heating. Then, the warm air flowing into the warm air duct 4 passes through the warm air duct 4 and is blown out from the warm air outlets 5 near the feet of the passengers, thereby heating the cabin space 16. On the other hand, the heating in the driver's seat space 17 is activated when the driver operates the operation switch of the driver's seat heating unit 21.

  Then, warm air is blown out from the defroster duct 14 along the inner surface of the windshield 13 of the bus vehicle to remove the fog on the windshield 13, and hot air is blown out from the foot duct 15 to the vicinity of the driver D. The driver's seat space 17 is heated. Further, as ventilation during heating, the outside air inlet 3b side is opened at the inside / outside air switching door 34 in the heater unit 3, so that outside air taken in from the luggage compartment space 18, that is, outside air having a lower humidity than the cabin air. Can be heated by the heater core 35, and fresh air can be supplied to the passengers and the driver D through the hot air duct 4.

  Next, features and effects of this embodiment will be described. First, in a vehicle having a luggage compartment space 18 between a front wheel and a rear wheel, a heater unit 3 for supplying warm air into the cabin space 16 is provided between the cabin space 16 and the luggage compartment space 18. Includes an inside air introduction port 3 a communicating with the cabin space 16 and an outside air introduction port 3 b communicating with the luggage compartment 18.

  According to this, the heater unit 3 for supplying warm air into the cabin space 16 is provided with the inside air introduction port 3a and the outside air introduction port 3b, and takes in outside air with low humidity from the luggage compartment 18 during heating, thereby providing one system. Warm air with low humidity can be blown out to the seats and mild heating can be provided. Further, by taking outside air from the luggage compartment 18, it is possible to receive water by directly taking outside air.

  The heater unit 3 includes an inside / outside air switching door 34 that switches between the inside air introduction port 3a and the outside air introduction port 3b. According to this, when it is desired to ensure the maximum heating performance, it is possible to switch to the inside air circulation with the same inside air suction as before. The heater unit 3 is disposed below the passenger compartment floor 16a and above the luggage compartment space 18. According to this, the heater unit 3 can be arranged without interfering with the cabin space 16 and the luggage compartment space 18, and the inside air duct 32, the outside air duct 33, the hot air supply duct 37, etc. are omitted, or It can be short and simple.

(Second Embodiment)
FIG. 5 is a partial side perspective view around the passenger seat S in the second embodiment of the present invention. As a feature different from the first embodiment described above, the heater unit 3 is disposed in the passenger compartment space 16. According to this, the heater unit 3 may be arranged not only under the floor but also under the passenger seat S on the floor. At this time, the inside air duct 32 becomes unnecessary, and it becomes possible by connecting the heater unit 3 and the luggage compartment space 18 with the outside air duct 33.

(Third embodiment)
FIG. 6 is a partial side perspective view around the passenger seat S in the third embodiment of the present invention. As a feature different from the above-described embodiments, the heater unit 3 is arranged in the luggage compartment space 18. According to this, the heater unit 3 may be disposed in the luggage compartment space 18. At this time, the outside air duct 33 becomes unnecessary, and the heater unit 3 and the cabin space 16 are connected by the inside air duct 32 and the hot air supply duct 37.

(Other embodiments)
In the above-described embodiment, the inside / outside air switching means 34 is integrally formed in the heater unit 3 (heater case 31). However, the present invention is not limited to the above-described embodiment. As a part, it may be configured separately from the heater unit main body part in which the heater core 35 and the blower 36 are housed in the heater case 31.

  Then, the separate inside / outside air switching section is arranged in the cabin space 16, the luggage room space 18, or a space between the two spaces separately from the heater unit main body section, and from the inside / outside air switching section as required. It is good also as a structure which has arrange | positioned the inside air duct 32, the outside air duct 33, the connection duct to a heater unit main-body part, etc.

  In the above-described embodiment, the inside / outside air switching means is switched using the pivoting plate door 34. However, a sliding door such as a film door may be used, or the inside air introduction side and the outside air introduction side. A configuration may be adopted in which an opening / closing means is provided for each of the switching. Further, not only the switching between the inside air and the outside air but also the one that varies the introduction ratio between the inside air and the outside air may be used.

  In the above-described embodiment, the cooling unit 1 is arranged on the roof of the bus vehicle as a roof-mounted type, but may be arranged under the floor of the bus vehicle. In the above-described embodiment, a hot water heater is used as the heater core 35. However, any heater capable of heating the blown air may be used, and a heat pump heating heat exchanger or an electric heater may be used. Note that the present invention may also be applied to a heating apparatus such as a railway vehicle if there is a space such as a luggage compartment space of the present invention that communicates with the outside of the vehicle between wheels.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bus vehicle showing a schematic configuration in a vehicle mounted state of a bus air conditioner according to an embodiment of the present invention. It is a perspective view which shows schematic structure of the air_conditioning | cooling unit 1 in FIG. 1, and shows the state which removed the cover. It is a side perspective view of the bus vehicle in a 1st embodiment of the present invention. It is a longitudinal cross-sectional view which shows schematic structure of the heating unit 3 of this invention shown with the broken-line circle in FIG. It is a partial side perspective view around the passenger seat S in the second embodiment of the present invention. It is a partial side perspective view around the passenger seat S in the third embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 ... Heater unit 3a ... Inside air introduction port 3b ... Outside air introduction port 16 ... Guest room space 16a ... Guest room floor part 18 ... Luggage room space 34 ... Inside / outside air switching door (inside / outside air switching means)

Claims (5)

In a vehicle with a luggage compartment space (18) between the front and rear wheels,
A heater unit (3) for supplying warm air into the cabin space (16) is provided between the cabin space (16) and the luggage compartment space (18).
The heater unit (3) includes an inside air inlet (3a) communicating with the cabin space (16),
A heating device for a bus comprising an outside air inlet (3b) communicating with the luggage compartment (18).   The said heater unit (3) is provided with the internal / external air switching means (34) which switches and opens and closes the said internal air inlet (3a) and the said external air inlet (3b). Bus heating system.   The heating device for buses according to claim 1 or 2, wherein said heater unit (3) is arranged below said passenger compartment floor (16a) and above said luggage compartment space (18). .   The heater for buses according to claim 1 or 2, wherein said heater unit (3) is arranged in said guest room space (16).   The heater for buses according to claim 1 or 2, wherein said heater unit (3) is arranged in said luggage room space (18).

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