JPH11170845A - Air conditioner for industrial vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for an industrial vehicle whereby air conditioning in a cabin can be performed in a condition that air blown out into the cabin from an air conditioning unit is difficult to directly flow in an inside air intake port and the air conditioning unit is heat insulated from the periphery. SOLUTION: A blow port 34 of an air conditioning unit 30 is arranged in a rearward direction in an operation cabin. A unit case 40 covering the air conditioning unit 30 is provided, in an air intake part 42 of this unit case 40, an inside air intake port 42a is provided in a condition opened in a cabin upward direction. An intake air path 43 connecting the inside air intake port 42a to a suction port 33 of the air conditioning unit 30 is formed by the unit case 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an air conditioning unit,
The present invention relates to an air conditioner for an industrial vehicle in which the suction port is located outside the driving cabin and the air outlet is provided inside the driving cabin so as to face the inside of the cabin.

[0002]

2. Description of the Related Art A conventional air conditioner has been disclosed, for example, in Japanese Utility Model Publication No. 57-28651.
That is, an air conditioner inner box provided with a blower at the front end side and an air outlet at the rear end side is arranged so as to penetrate a wall plate supporting the front glass of the cabin, and the air outlet is located in the cabin. Some air conditioners can be blown into the cabin and air-conditioned by a simple structure that does not require a duct connecting the outlet and the cabin. In this air conditioner, a suction port as an inside air intake port is provided on a side of a portion of the inner box located in the cabin in a state of opening toward the rear of the cabin, and a blower is provided from the suction port to the inside of the cabin. It was designed to suck in air.

[0003]

In the above-mentioned conventional air conditioner, a problem is apt to occur in which the air sent into the cabin from the outlet is sucked into the inside air intake immediately after leaving the outlet. Was. An object of the present invention is to provide an air conditioner for an industrial vehicle in which the above-described air conditioning trouble is easily avoided and the air conditioning unit performs an air conditioning operation in a state of good heat insulation with the surroundings.

[0004]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Construction] In an air conditioning system for an industrial vehicle, the air conditioning unit is provided with its air inlet positioned outside the driving cabin and the air outlet positioned inside the driving cabin inward of the cabin. A unit case that covers the air-conditioning unit in a state where the air conditioner is exposed, and the unit case has an inside air intake port that opens in a direction along the cabin side wall in the driving cabin, An intake passage communicating with the mouth is formed.

[Operation] The outlet is directed toward the rear of the cabin.
The inside air intake port opens in the direction along the side wall of the cabin, such as the cabin upward, while opening inwardly in the cabin. Can be taken in through the intake. The air conditioning unit is formed in a unit case and sucks air from the inside air intake through a suction path with good heat insulation from the surroundings, and is covered with the unit case and has good heat insulation from the surroundings. Air conditioning is performed while performing heat exchange processing.

[Effect] The air inside the cabin to be sucked by the air conditioning unit and subjected to heat exchange processing is sucked in a state in which the air immediately after being blown out from the blowout port is hardly mixed, and the air conditioning is performed in a state in which the adverse effect due to the ambient temperature is hard to occur. The air is sucked into the unit and heat-exchanged, so that air conditioning in the cabin is efficiently performed.

The structure, operation and effect of the invention according to claim 2 are as follows.

In the structure according to the first aspect of the present invention, the air conditioning unit is supported by a front side wall of the operating cabin, the outlet is opened rearward of the cabin, and the inside air intake is located above the air conditioning unit. And is open upward in the cabin along the front side wall.

[Operation] In the vicinity of the inner surface of the front wall of the cabin, the cabin interior air is heated by sunlight and the interior of the cabin is easily heated, so that the temperature changes and the cabin interior temperature is easily affected. However, since the inside air intake port opens upward in the cabin along the front side wall, air near the front side wall is easily sucked into the air conditioning unit, and air near the front side wall is subject to temperature change. Air conditioning can be performed while minimizing temperature changes in the cabin.

[Effect] Comfortable living comfort can be exhibited by air-conditioning so that the air near the inside of the front wall is not easily affected by the temperature which is easily changed.

The structure, operation and effect of the invention according to claim 3 are as follows.

[0013] [Structure] In the structure of the invention according to claim 1 or 2, a state is provided in which the air intake unit is provided with an outside air intake for sucking the outside air of the driving cabin, and the air conditioning unit sucks air from the outside air intake. And an air intake switching means for switching the air intake from the inside air intake port.

[Operation] When the air intake switching means is operated, the air conditioning unit takes in air from the inside air intake, and circulates air inside the cabin between the cabin and the air conditioning unit to perform air conditioning. The air can be air-conditioned while the outside air of the cabin is fed into the cabin through the air-conditioning unit.

[Effect] It is possible to circulate the air inside the cabin for efficient air conditioning, or to take in outside air and air-condition while freshening the air inside the cabin.

The structure, operation and effect of the invention according to claim 4 are as follows.

[Structure] In the structure of the present invention according to claim 3, air is sucked from both the outside air intake and the inside air intake through the intake portion.
In addition, an air filter is provided so as to be detachably supported.

[Operation] In both cases of circulating the air inside the cabin and taking in the air outside the cabin, the air can be air-conditioned while sending the clean air through the same air filter into the cabin. The air filter can be removed and cleaned, or replaced with another air filter.

[Effect] In both the case of circulating the air inside the cabin and the case of taking in the air outside the cabin, the air which has been cleaned or sent by a clean air filter which has been exchanged can be supplied with air-conditioning which is rich in hygiene. In addition, in the case of internal air circulation and in the case of external air intake, a simple structure using the same air filter can be obtained, which is advantageous in terms of economy and the like.

The structure, operation and effect of the invention according to claim 5 are as follows.

In the configuration of the present invention according to any one of claims 1 to 4, the air-conditioning unit is provided by forming air outlets in the cabin communicating with the air outlets of the air-conditioning unit at a plurality of locations in the operating cabin. A guide duct is provided for blowing air from the vehicle to a plurality of locations in the driving cabin.

[Operation] The air from the outlet is dispersed and supplied to a plurality of locations in the cabin by the guide duct.

[Effect] The air for air conditioning is distributed to a plurality of locations in the cabin, so that the air can be efficiently air-conditioned.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a pair of left and right drivable front wheels 1, 1 and rear wheels 2, 2 are self-propelled, and an engine 3 and an engine hood 4 covering the engine 3 are provided. A lift arm 5 for connecting various working devices such as a rotary tilling device so as to be able to ascend and descend to a rear portion of a vehicle body including a driving unit having a driving cabin 10 located on the rear side of the driving unit. The tractor is provided with a power take-off shaft 6 for transmitting power.

As shown in FIGS. 2 to 5, a compressor 22 for compressing the refrigerant is mounted on the front end side of the engine 3 and a driving pulley 22a for the compressor 22 is provided.
Is linked to the output shaft of the engine 3 by a transmission belt to enable the driving of the compressor 22 by the engine 3, and a refrigerant condenser 24 is arranged on the front side of an engine cooling radiator 23 located in front of the engine 3, and the radiator The cooling air is supplied to the refrigerant condenser 24 by a rotary fan 25 movably disposed on the rear surface side of the radiator 23 so as to suck and supply the cooling air to the refrigerant 23, and the refrigerant is supplied to the compressor 22 and the condenser 24. Operate the air conditioning unit 30 including an evaporator 31 configured to be connected by the circulation pipe 26, a heating heat exchanger 32 configured to take in heat generated by the engine 3 for heating by the hot water circulation hose 27, and the like. Front wall 1 of cabin 10
2 to allow air conditioning for cooling and heating the operation cabin 10. The details are configured as follows.

The air conditioning unit 30 includes a pair of left and right suction ports 3.
A device case 35 provided with front and rear ends 3 and 33 and one outlet 34 at a rear end, and a pair of left and right rotating fans 36 and 36 located at the front end inside the device case 35;
An electric fan motor 37 in which each of the rotating fans 36, 36 is integrally rotatably mounted on an output shaft; and the evaporator 3 located behind the rotating fan 36 in the equipment case.
1 and the heating heat exchanger 32 located on the rear side of the evaporator 31 in the equipment case, in a state where most of the air conditioning unit 30 except for the air outlet 34 is covered by the unit case 40, and With the outlet 34 located behind the instrument panel 28 inside the operation cabin 10, the air conditioning unit support 10a of the operation cabin 10 having a unit mounting hole 12d provided in the front wall 12 of the operation cabin 10 is provided. It is attached. The outlet 3
4 communicates with the air intake side of the guide duct 29, and the air outlet side of the guide duct 29 is connected to the first cabin outlet 2 located on both sides of the instrument panel 28.
9a and a second located near the front of the bottom in the driving cabin.
And a cabin outlet 29b.

When the fan motor 37 is driven, the air-conditioning unit 30 draws air from the suction port 33 into the inside of the equipment case 35 by the suction and blowing action of each of the rotary fans 36 driven by the fan motor 37. The air supplied to the evaporator 31 and the heating heat exchanger 32 is cooled by the evaporator 31 and the heating heat exchanger 32.
The heated air is sent out from the outlet 34. Then
The guide duct 29 guides the cooling air and the heating air from the air conditioning unit 30 to the cabin outlets 29a and 29b, and the two sides of the instrument panel 28 inside the operation cabin 10 and the vicinity of the left and right operation steps. Blow out to multiple places.

As shown in FIG. 7, the air-conditioning unit supporting portion 10a is provided with a part of an iron plate portion 12b made of an iron plate so as to insulate the inside of the engine hood and the inside of the operation cabin of the front side wall 12 from the inside of the cabin. Unit support part 1 created by bending toward
2e, extending from the iron plate portion 12b above the engine 3 inside the engine hood 4 and
A unit support member 41 connected only to the iron plate portion 12b so as to be cantilevered, and the unit mounting hole 1
2d. The unit case 40 is
The air-conditioning unit 30 is supported by the unit supporting member 41 and the unit supporting portion 12e so that the front end side is inside the engine hood 4 and the rear end side is inserted into the inside of the driving cabin 10 through the unit mounting hole 12d. The air conditioner 30 is fastened and fixed to the unit support member 41 and the unit support portion 12e by co-fastening with the air-conditioning unit 30 by mounting bolts that are fastened and fixed to the member 41 and the unit support portion 12e. That is, the air conditioning unit 30 is arranged such that the suction port 33 is outside the operation cabin 10 and the rear part of the heating heat exchanger 32 and the air outlet 34 enter the inside of the operation cabin 10 more than the outside surface of the front side wall 12. And unit case 4
The unit support member 41 and the unit support portion 12e support the unit support member 41 and the unit support portion 12e so that the unit case 40 can be removed together with the unit case 40 by removing the unit support member 0 from the unit support member 41 and the unit support portion 12e.

Above the rear end of the unit case 40 located in the operation cabin, an intake case is attached to form an intake section 42. The intake section 42 has an inside air intake port 42a opening upward in the cabin along the glass side wall section 12a made of a transparent glass plate of the front side wall 12 inside the operation cabin 10, and the unit mounting of the sheet metal section 12b. An outside air intake port 42b is provided on the outside of the driving cabin 10 through the through hole 12f located above the hole 12d. The inside air intake 4
A unit case 40 forms an intake path 43 inside the engine hood 4 for communicating the 2 a and the outside air intake port 42 b with the left and right intake ports 33, 33 of the air conditioning unit 30. That is, the air-conditioning unit 30 takes in the air inside the operation cabin from the inside air intake port 42a and the air outside the operation cabin from the outside air intake port 42b into the inside of the unit case 40 by the suction action of the rotary fan 36, and Through each of the suction ports 33. Thereby, the air conditioning unit 30
Both the air inside and outside the driving cabin 10 is sucked while being isolated from the inside air of the engine hood 4 so that the air inside the engine hood 4 is not mixed.

An air filter 44 and an intake switching valve body 45 as intake switching means located above the air filter 44 are provided inside the intake section 42, and upwardly from a long hole 42c of the intake section 42. An operating portion 4 formed so as to protrude and provided on the intake switching valve body 45
5a is manually slid in the front-rear direction along the elongated hole 42c.
2, a first air conditioning position in which the inside air intake 42a is opened and the outside air intake 42b is closed, and only the cabin interior air is introduced into the air conditioning unit 30, and the inside air intake 42a is also an outside air intake. A second air conditioning position in which both the inside and outside of the cabin is taken into the air conditioning unit 30 by opening the opening 42b and the inside air intake 42a is closed with the outside air intake 42b opened and only the cabin outside air is air-conditioned. It is configured to switch to the third air conditioning position to be taken into the unit 30. The air filter 44 is arranged so that air sucked from either the inside air intake port 42a or the outside air intake port 42b passes therethrough. The air conditioning unit 30 cleans both the cabin interior air and the cabin exterior air through the same air filter 44. Incorporated in the state.

The air filter 44 is supported by a filter support 47. As shown in FIG. 6, the filter support 47 includes a filter support frame portion 47a configured to insert and remove the air filter 44 from above,
And a pair of holding spring plates 47b. And FIG.
As shown in the figure, the filter support frame portion 47a of the filter support member 47 is inserted into the intake section 42 from the filter insertion port located rearward in the cabin, and the holding spring plate 47b is brought into contact with the bottom plate in the intake section 42 so that The air filter support 47 is attached to the intake unit 42 in a used state by pressing and holding the air filter 44 in the intake unit by the reaction force. That is, the air filter 44 can be attached to the intake unit 42 or removed from the intake unit 42 by operating the filter support 47 in and out of the intake unit 42.

That is, when the air conditioning unit 30 is operated to the cooling side, the air cooled by the air conditioning unit 30 is sent out from the outlet 34 by the evaporator 31, and the air is diffused by the guide duct 29 to a plurality of locations in the operation cabin and supplied. Is done. Thereby, the cabin can be cooled. When the air-conditioning unit 30 is operated to the heating side, the air-conditioning unit 30 sends out the air heated by the heating heat exchanger 32 from the air outlet 34, and the air is diffused and supplied to a plurality of locations in the operation cabin by the guide duct 29. You. Thus, the cabin can be heated. In both the case of cooling and the case of heating, when the intake switching valve body 45 is operated to the first air conditioning position, the air conditioning unit 30 takes in only the cabin air, cools and heats it, and returns to the cabin. Is circulated between the operating cabin 10 and the air conditioning unit 30 to perform air circulation air conditioning for cooling and heating. When the intake switching valve body 45 is operated to the second air conditioning position, the air conditioning unit 30 takes in air both inside the cabin and outside the cabin, cools and heats the air, and sends the air into the cabin. The mixed air conditioning that circulates between the air conditioning unit 10 and the air conditioning unit 30 and also cools and heats the outside air of the cabin and sends it into the cabin to perform cooling and heating can be performed. When the intake switching valve body 45 is operated to the third air conditioning position, the air conditioning unit 30 can perform outside air supply air conditioning in which only the outside air of the cabin is taken in, cooled and heated, and sent into the cabin to perform cooling and heating.

The unit case 40 has a lower case portion 40a configured to be bolt-connected to the unit support member 41 and the unit support portion 1e, and is connected to the lower case portion 40a so as to be separable.
And the upper case portion 40b configured to have In other words, the air conditioning unit 30 is divided into a lower case portion 40a and an upper case portion 40b so that the air conditioning unit 30 can be taken in and out.

[Another Embodiment] Instead of the above embodiment, a configuration is adopted in which the air outlet 34 of the air conditioning unit 30 is opened rearward of the cabin and the inside air intake port 42a is opened laterally of the cabin, or the air conditioning unit 30 is operated. Attached to the rear wall of the cabin, the outlet 33 of the air conditioning unit 30 is opened forward of the cabin, and the inside air intake port 42a is opened upward of the cabin along the rear wall of the cabin,
The same object can be achieved even if a configuration in which the cabin is opened sideways is adopted. Therefore, the opening directions of the outlets 34 are collectively referred to as the inside of the cabin, and the opening directions of the inside air intakes 42a are collectively referred to as the direction along the cabin side wall.

The present invention is applicable not only to tractors but also to various agricultural work vehicles such as combines and various construction machines such as backhoes. Therefore, these are collectively referred to as industrial vehicles.

[Brief description of the drawings]

Fig. 1 Side view of the entire tractor

FIG. 2 is a side view of the air conditioner.

FIG. 3 is a cross-sectional view of an air-conditioning unit installation section.

FIG. 4 is a plan view of an air-conditioning unit installation section.

FIG. 5 is a sectional view of an air conditioning unit.

FIG. 6 is a perspective view showing a disassembled state of an intake unit and an air filter support.

FIG. 7 is a perspective view of a cabin front side wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Operating cabin 29 Guide duct 29a, 29b In-cabin outlet 30 Air-conditioning unit 33 Suction port 34 Outlet 40 Unit case 42a Inside air intake 42b Outside air intake 43 Intake path 44 Air filter 45 Intake switching means

Claims (5)

[Claims] 1. An air conditioner for an industrial vehicle, comprising: an air conditioning unit having a suction port located outside the driving cabin and an air outlet positioned inside the driving cabin toward the inside of the cabin. A unit case that covers the air conditioning unit with the outlet exposed is provided, and the unit case has an inside air intake port that opens in the direction along the cabin side wall in the operation cabin, An air conditioner for an industrial vehicle having an intake path communicating with an intake port. 2. The air conditioning unit is supported on a front side wall of the operation cabin, the outlet is opened rearward of the cabin, the inside air intake port is located above the air conditioning unit, and the cabin extends along the front side wall. The air conditioner for an industrial vehicle according to claim 1, which is open upward. 3. An air intake port for sucking outside air from a driving cabin is provided in the air intake section, and the air conditioning unit is switched between a state in which air is taken in from the outside air intake port and a state in which air is taken in from the inside air intake port. 3. The air conditioner for an industrial vehicle according to claim 1, further comprising an air intake switching unit. 4. An air filter is provided in the suction section so that air sucked from either the outside air intake port or the inside air intake port passes therethrough and is detachably supported. Item 3. An air conditioner for an industrial vehicle according to item 3. 5. A guide duct for forming air outlets in the cabin communicating with the air outlets of the air conditioning unit at a plurality of locations in the operating cabin and for blowing air from the air conditioning unit to a plurality of locations in the operating cabin. The air conditioner for an industrial vehicle according to claim 1.