JP2000127738A - Air-conditioning device for construction machine and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning device for a driver' cab for a construction machine consisting of a vertical package type air-conditioning room unit arranged in a driver's cab so that an installation volume can be reduced to a low value and air-conditioned air can rationally be fed to a driver. SOLUTION: In an air-conditioning device to perform air-conditioning of the interior of the driver's cab of a running vehicle having a working machine, an indoor unit is formed in a vertical type, and an evaporator 3 is arranged in an upper position in a unit box 2, a blower 4 in an intermediate position, and a heater core 5 in a lower part position. An air inlet 10 is formed in the outer side of the unit box 2 positioned facing the evaporator 3. Further, a hot air outlet 7 is formed in the outside of the unit box 2 positioned facing the heater core 5, and an air-conditioning regulating part 9 and a cold air outlet 6 are formed in the top part of the unit box 2. A cold air duct 15 is externally disposed between the supply air port 4c of a blower 4 and a cold air outlet 6, and a damper 8 to switch air supply to the cold air duct 15 and the heater core 5 side is arranged in the front position of the supply air port 4c of the blower 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner installed mainly in a driver's cab of a construction machine, and more particularly to an air conditioner installed in a driver's cab side of a driver's cab to rationally control the temperature of an operator. TECHNICAL FIELD The present invention relates to an air conditioner for a construction machine or the like which can send compressed air to effectively use a narrow installation space and can prepare a work environment comfortably.

[0002]

2. Description of the Related Art An operator's cab mounted on a construction machine such as a hydraulic shovel is equipped with an air conditioner so that work can be performed comfortably. Usually, the air conditioner installs an air conditioning unit including a compressor, an evaporator, and a heater outside the cab so that the air conditioned by a duct can be guided into the room and blown out from the air conditioning unit so that the cab can be widely used. It has been like that. In general, a duct is provided along the inner wall surface of the driver's cab, and an outlet for blowing air toward the driver's seat is provided in the duct. An example of such an air conditioner is disclosed in Japanese Patent Application Laid-Open No.
It is disclosed in 776475.

As an attempt to achieve more effective air conditioning in a conventional air conditioner, an example in which an air conditioning unit is installed outside a room and a cool air or a hot air is blown out near a driver's seat by a duct is registered as a utility model registration. 25773
No. 37 is known. The air conditioner disclosed in this publication is installed in a lower rear part outside the cab with an air conditioning unit sunk into a part of the cabin, and from this air conditioning unit to a column integrally attached to a driver seat portion. The built-in air outlet is provided so that air is blown out toward the upper body of the driver in a seated state.

[0004]

However, Japanese Patent Application Laid-Open No. Hei 8
-119155 or Patent No. 2776475
No problem arises in an air conditioner of the type disclosed in Japanese Patent Application Laid-Open Publication No. H11-27139, when the structure of the cab allows a large space in the cab. Therefore, in a model in which the rear portion of the revolving structure is formed short and the rear turning radius is reduced, the installation space of the driver's cab is inevitably reduced,
Since there is no room to install the air conditioning unit outside the room, there is a problem that the structure is unreasonable.

In an air conditioner of the type disclosed in Japanese Utility Model Registration No. 2577337,
Certainly, it is a configuration that can reasonably utilize a narrow space, but if the operator's cab is also formed as a small unit, a specific structure is necessary to install an air conditioning unit outside the operator's cab with a part omitted. Limited to things. In particular, a model in which the rear part of the revolving structure is shortened to facilitate turning when working in a narrow place (for example, a structure in which the outer diameter of the revolving structure is the same as or larger than the outer width of the crawler track) In many cases, there is little room for installing an air conditioning unit behind or below the cab mounting part due to its structure.Therefore, the air conditioning unit as described above is provided outside the cab, and air conditioned by ducts is introduced into the room. There is a difficulty in providing a guiding configuration.

[0006] By bringing the air conditioning unit into the room,
For example, there is a system that is installed under the driver's seat. However, this requires a large space to be provided under the driver's seat, which complicates the structure, and also requires a driver's seat for maintenance. There is a problem that work is troublesome, such as the need to remove the

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and can be installed in a narrow space so that the driver's cab can be used more effectively and the temperature-controlled air can be rationalized to the driver. It is an object of the present invention to provide a vertically-installed package-type air conditioner for a construction machine in which an air-conditioning indoor unit and a blow-out portion configured to be able to be supplied in a uniform manner are integrally formed.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, an air conditioner for a construction machine or the like according to the present invention includes a construction machine or the like for air-conditioning a cab of a traveling vehicle having a working machine. In the air conditioner, the indoor unit is formed in a vertical type, and an evaporator is disposed at an upper position in the unit box, a blower is disposed at an intermediate position, and a heater core is disposed at a lower position, and the indoor unit is disposed outside the unit box facing the evaporator. An air inlet is provided on a side surface, a hot air outlet is provided on an outer surface of the unit box facing the heater core, and a cool air outlet is provided on an upper portion of the unit box. A cool air duct is provided between the outlet and the blower's air outlet switches between the cool air duct and the heater core. It is characterized in that that the damper is provided.

According to the present invention, with this configuration, it is possible to provide a reasonable structure in which only a compressor for a refrigerant is disposed in an engine room, and a heater core is introduced into an air conditioning indoor unit to use a narrow space. Since the cool air is blown out from the upper part of the unit box and the warm air is blown out from the lower part, if this air-conditioning indoor unit can be installed and operated on the side of the driver's seat, it can be operated according to the climate For the operator seated in the driver's seat, cold air can be supplied to the upper body side and warm air can be supplied to the feet by switching with a damper, so that air conditioning of so-called head cold and foot heat can be done, and the work can be done in a comfortable condition. To play. In addition, the driver can operate the switch of the air-conditioning adjustment unit in a seated state, so that the handling is easy.

In the present invention, the blower in the indoor unit is disposed at an intermediate position, the evaporator corresponding to the air suction port is disposed at an upper position, and the heater core is disposed at a lower position, and dry air is supplied through the evaporator. It is preferable that the air is sent to the heater core, heated by the heater core, and the warm air is blown out from the warm air outlet toward the driver's seat side to the feet of the driver sitting on the driver's seat. By doing so, since dry warm air can be supplied to the feet of the driver, it can be heated effectively, and furthermore, the effect of lowering the humidity in the driver's cab and keeping the driver comfortable can be achieved.

It is preferable that the cool air duct is provided along an outer surface of the unit box on a side opposite to the suction port side. In this case, even if the thickness of the unit box is formed to an allowable minimum, the space of the cool air duct can be secured without difficulty, and the air can be blown without disturbing the flow in the flow path from the blower air blow opening to the upper cool air blow outlet. This has the effect. Further, it is preferable that the cool air duct forms a wall surface of the unit box and is detachable. In this case, since the evaporator portion is exposed by removing the cool air duct from the unit box, an effect that inspection and repair of the evaporator portion can be easily performed is obtained.

Further, in the present invention, it is preferable that the indoor unit is installed in a console cover on a side of a driver's seat.
By doing so, the driver's cab can be made more spacious, the effective use of the console cover, which was previously a dead space, can be improved, the appearance can be improved, and cold or hot air can be supplied close to the driver. The effect that the blowing speed is effective even if the blowing speed is reduced is also obtained.

Further, the filter attached to the air suction port of the indoor unit may be detachably mounted on a filter holding frame whose lower part is attached to the unit box by a hinge and whose upper part can be opened and closed outward by a required angle. It is preferable that the filter holding frame is fixed and the filter holding frame is fixed. In this case, if the filter holding frame is lowered toward the front side after the fixing with the screw or the like is released, there is an effect that the filter can be easily taken out and mounted.

The refrigerant pipe and the hot water pipe to the indoor unit are formed such that an inner / outer connection pipe is fixedly penetrated to a flange for closing an introduction port into the cabin, and the pipes are connected to the refrigerant and the hot water pipe both inside and outside. It is characterized by comprising. With this arrangement, the introduction openings for drawing the refrigerant pipes from the compressor to the evaporator and the hot water pipes from the radiator to the heater core into the cabin (operating cab) are closed by flanges that have been previously inserted through the pipes by welding or the like. Thus, there is an effect that the inside of the cabin can be easily cut off from the outside and the air conditioning effect can be enhanced by connecting both the refrigerant and the hot water piping inside and outside.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of an air conditioner for a construction machine or the like according to the present invention will be described with reference to the drawings.

FIG. 1 is a front view of an indoor unit according to an embodiment of the air conditioner according to the present invention, and FIG.
FIG. 3 is a right side view (a) and a left side view (b) of FIG.
1 is a rear view of FIG. 1, and FIG. 5 is a perspective view of a pipe connection part.

The air conditioner of the present embodiment is provided with a revolving body above a vehicle body (not shown) such as a hydraulic shovel, for example, via a boom that rises and falls on the revolving body and an arm connected to the tip of the boom. It is used in a cab of a construction machine including a working machine to which a shovel bucket is attached.

In this air conditioner, a cooling compressor is provided in an engine room (not shown), and a refrigerant pipe supplied from the compressor and a hot water pipe using a cooling water of a radiator of the engine as a heating source are provided in an operation cab. The indoor unit 1 that draws in and sends out cool air and warm air is installed in the cab.

The indoor unit 1 is of a vertical package type, and the whole dimensions are arranged so as to have a minimum allowable volume. The evaporator 3 is located at an upper position in the unit box 2, the blower 4 is located at an intermediate position, and A heater core 5 having a shape for circulating hot water is provided at a lower position, an air conditioning unit 9 such as a cool air outlet 6 and an air conditioning control switch is provided at the top, and a hot air outlet 7 is provided at the lower portion. The configuration is such that the blower 4 is switched between the cool air and the warm air by the damper 8.

The evaporator 3 has a known structure formed in a horizontally long shape, and is arranged in the width direction of the unit box 2, and the inlet 3 a and the outlet 3 b of the refrigerant (specifically, the left side) project from one side. In addition, a refrigerant pipe is connected from outside through a pipe inlet (not shown) provided at an appropriate position on the side wall of the cab.

The blowers 4 are arranged on both sides of a two-axis motor 12 installed on a support base 11 at an intermediate position of the unit box 2, and are structured so as to be directly connected coaxially. Although not shown in the drawing, the cool air is guided to the suction port 4b of the casing 4a from the rear side of the evaporator by a collecting duct (not shown), and the blow port 4c is disposed obliquely downward on the rear side. I have.

The heater core 5 is a fin heater having a well-known structure disposed horizontally below the unit box 2 and, like the evaporator 3, has an inlet 5a and an outlet 5b protruding from one side of the hot water and a refrigerant pipe. Similarly, a hot water pipe connected to the radiator of the engine is drawn into the inside from a pipe inlet on the wall of the cab and connected.

A suction port 10 is provided outside the front of the unit box 2 at a position corresponding to the evaporator 3, and a filter 13 is provided on the front of the air suction port 10. The filter 13 has a hinge 13b at the lower edge.
Is attached to the side surface of the unit box 2 and both sides are stopped by a plurality of knob screws 14 (small screws whose heads are pinched). When these knob screws 14 are removed, they can be opened and closed by tilting to a predetermined angle. Inside the filter holding frame 13a,
For example, it is slidably attached and held detachably.
A hot air outlet 7 is provided at a position corresponding to the heater core 5 on the front outside of the unit box 2, and a cool air outlet 6 is provided at the top. An air conditioning unit 9 having an air conditioning control switch and the like is provided on the top surface of the unit box 2. In addition, the cold air outlet 6
Can be provided at an upper position other than the top as needed.

A cool air duct 15 from the blower 4 to the cool air outlet 6 is detachably provided on the back side of the unit box 2 and is isolated from the cooling chamber 3A in which the evaporator 3 is installed. The cool air outlet 6 is provided with a blade having a well-known structure capable of adjusting the direction of the blown cool air. The cold air duct 15 of the unit box 2
A large opening 2a is formed on the surface on which the unit 2 is to be mounted, and the opening 2a is covered by the cool air duct 15. In other words, the cool air duct 15 is formed as a wall surface that covers the opening 2a of the unit box 2. Therefore, when the bolt attaching the cool air duct 15 is removed and the cool air duct 15 is removed, the cooling chamber 3A is exposed through the opening 2a, so that inspection and repair of the evaporator 3 and the like in the cooling chamber 3A can be easily performed.

As shown in FIG. 2, the damper 8 for switching the blowing direction of the cool air and the hot air is provided with a blower port 4c of the blower 4.
When the end of the support shaft 8a of the damper 8 is guided to the outside of the unit box 2, a switching lever 16 is attached to the end of the support shaft 8a, and the switch lever 16 is lowered downward by the switch lever 16. When the heater core 5 side is closed, air is blown into the cool air duct 15, and when it is raised upward, the cool air duct 15 side is closed and air is blown to the heater core 5 side. Thus, the installation location of the damper 8 is as follows.
The air outlet 4c of the blower 4 is arranged obliquely downward and the structure in which the cool air duct 15 is externally attached to the unit box 2 enables a wide swing of the damper 8 even if the thickness is minimized. The space 16 can be secured.

The refrigerant pipe and the hot water pipe to the evaporator 3 and the heater core 5 in the indoor unit 1 described above are separately connected to the cab and the outside of the cab by a pipe connecting part 20 shown in FIG. Can be. That is, the pipe connecting parts 20 are orthogonal to the mounting flange plate 21 sized to close the pipe inlet 36 provided at an appropriate position on the wall surface 35 of the cab, and are connected to the refrigerant connection pipes 22 and 22 ′ and the hot water connection pipe 23. , 23 'are fixed. Therefore, the mounting flange plate 21 is attached to the pipe inlet 36 formed on the wall surface 35 of the cab with bolts, and the pipe inlet 36 is closed. Thereafter, the connection pipes 22 and 22 ′ for the refrigerant and the hot water Outside the operator's cab, the refrigerant compressor and the outer ends of the refrigerant connection pipes 22 and 22 ', and the radiator and the outer ends of the hot water connection pipes 23 and 23' are connected to the connection pipes 23 and 23 '. Inside the cab, the inner ends of the refrigerant connection pipes 22, 22 'and the evaporator 3 are connected, and the inner ends of the hot water connection pipes 23, 23' and the heater core 5 are connected. By doing so, the inside and outside of the cab can be cut off and the piping can be easily connected, and there is no gap between the inside and outside of the wall of the cab, so that the influence of the room air-conditioned by the outside temperature can be cut off. .

Although not shown, a refrigerant pipe from the compressor for refrigerant installed on the engine room side to the indoor unit and a hot water pipe from the radiator include:
In each case, a well-known air-conditioning valve and a hot water control valve are provided, and are related so as to be controlled by an air-conditioning adjusting unit 9 provided in the indoor unit.

The air conditioner of this embodiment thus constructed is
For installation in the driver's cab, for example, as shown in FIGS. 6 and 7, it is mounted so as to be incorporated into the console cover 31 on one side of the driver's seat 30 in the driver's cab. The installation height is, of course, set to a size that does not hinder the operation of the work machine and the operation at the time of traveling while the driver is sitting in the driver's seat 30.

When the indoor unit 1 is installed in this manner, when the compressor and the blower 4 are started as an air conditioner, the refrigerant flows from the compressor through the refrigerant pipe, the evaporator 3 is operated, and the blower 4 is driven to rotate, whereby the air is blown. When air is sucked in from the suction port 10, the air heat exchanged by the evaporator 3 is sucked into the suction port 4 b of the blower 4 through the collecting duct, discharged from the blow port 4 c of the blower 4 and switched by the damper 8. Sent in the direction of

If the damper 8 is set to the cool air supply side (in FIG. 2, the damper 8 is shown by a solid line), the cooled air flows toward the cool air duct 15 and enters the room from the cool air outlet 6 at the top. Be blown out. Accordingly, if the driver adjusts and sets the direction of the blade provided in the cool air outlet 6 to a direction that is convenient for him / her, the driver can blow cold air toward the upper body. It allows you to work comfortably by being cooled. The temperature of the cool air may be controlled by adjusting the switch of the air conditioning unit 9 in the same manner as in the conventional air conditioning.

When the temperature is low, such as in winter, the cooling is switched to heating by the air conditioning controller 9 so that hot water flows from the radiator to the hot water pipe and the supply amount of the refrigerant is reduced (before cooling). The throttle valve in the refrigerant pipe is fully opened or adjusted to a required amount during cooling by switching between heating and heating, and the valve of the hot water pipe is set to open only during heating.) By switching to the hot air duct side by the lever 16, the blower port 4 c of the blower 4 is switched to the heater core 5 side, so that the air sucked from the suction port 10 through the evaporator 3 is dehumidified, and the blower 4 heats the heater core. 5 and is heated while passing through the heater core 5 and blown out from the warm air outlet 7 to the feet of the driver. Therefore, the driver is warmed at his / her feet close to him, so that warm air gathers in the upper part of the room and heats his / her head from his / her face, unlike a general air conditioner. Work can be done. The adjustment of the heating temperature is performed by the adjustment in the air conditioning adjustment unit 9 as in the conventional case.

When the filter 13 provided in the air inlet 10 is to be cleaned, the filter holding frame 13a is removed as shown by a two-dot chain line a in FIG. The filter 13 can be easily attached and detached despite being installed in the console cover 31 by opening and tilting the filter 13 toward the front side, pulling up the filter 13 to be attached to the inside, removing the filter 13 after cleaning, and then returning the filter 13 to its original position. It is easy to clean and restore. The method of fixing the filter holding frame 13a is not limited to the above-described method, and it goes without saying that the filter holding frame 13a can be fixed with a magnet or the like.

In the air conditioner of the present invention, as described above, the indoor unit 1 is entirely condensed and the installation space is small, and the evaporator 3 is set up with the blower 4 as a reference and the heater core 5 is set down. In this way, the cold air can be supplied separately from the upper part and the warm air can be supplied separately from the lower part to the feet of the driver, and a device that can be reasonably air-conditioned can be obtained.

In the above description, the air conditioner according to the present invention is provided in the cab mounted on a swing body such as a hydraulic shovel, but is applied to the cab of a working machine having no swing body. It goes without saying that things can be done arbitrarily.

The connecting pipe for refrigerant in this embodiment corresponds to the inside / outside connecting pipe of the present invention, and the connecting pipe for hot water in this embodiment also corresponds to the inside / outside connecting pipe of the present invention.

[Brief description of the drawings]

FIG. 1 is a front view of an indoor unit according to one embodiment of an air conditioner according to the present invention.

FIG. 2 is a central longitudinal sectional view of FIG. 1;

3 shows a side view of FIG. 1, wherein (a) shows a right side view and (b) shows a left side view, respectively.

FIG. 4 is a rear view of FIG. 1;

FIG. 5 is a perspective view of a pipe connection part.

FIG. 6 is a plan view showing a state in which the indoor unit according to the present embodiment is installed in a console cover on a driver's seat side.

FIG. 7 is an elevational view taken along the line AA in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Unit box 2a Opening on the back side of unit box 3 Evaporator 4 Blower 5 Heater core 6 Cold air outlet 7 Hot air outlet 8 Damper 9 Air conditioning unit 10 Air inlet 12 Motor for blower drive 13 Filter 13a Filter holding Frame 13b Hinge for attaching filter holding frame 15 Cold air duct 16 Damper switching lever 20 Pipe connection part 21 Mounting flange plate 22, 22 'Refrigerant connection pipe 23, 23' Hot water connection pipe 30 Driver's seat 31 Console cover 35 Wall of operator's cab 36 Piping inlet

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Yoshihiro Nagata, 3-1-1 Ueno, Hirakata-shi, Osaka Inside the Osaka Plant of Komatsu Manufacturing Co., Ltd. (72) Kenshi Wada 3-1-1, Ueno, Hirakata-shi, Osaka Co., Ltd. F-term (reference) in Komatsu Ltd. Osaka factory 3L011 BA01

Claims (8)

[Claims] In an air conditioner for a construction machine or the like for air-conditioning a cabin of a traveling vehicle having a working machine, an indoor unit is formed in a vertical installation type, and an evaporator is provided at an upper position in the unit box and a blower is provided at an intermediate position. A heater core is arranged at a lower position, an air suction port is provided on an outer surface of the unit box facing the evaporator, and a hot air outlet is provided on an outer surface of the unit box facing the heater core. A cool air outlet is provided in an upper part of the cool air duct, and a cool air duct is arranged between the blower outlet of the blower and the cool air outlet,
An air conditioner for a construction machine or the like, characterized in that a blower for the blower is provided at a blower opening of the blower between the cold air duct and the heater core. 2. A blower in the indoor unit is arranged at an intermediate position, an evaporator corresponding to an air suction port is arranged at an upper position, and a heater core is arranged at a lower position. Dry air is sent to the heater core through the evaporator. The air conditioner of a construction machine or the like according to claim 1, wherein the heater core is configured to blow warm air from a warm air outlet directed toward a driver seat side toward a driver seat side to a foot of a driver sitting on the driver seat. 3. The air conditioner for a construction machine or the like according to claim 1, wherein the cool air duct is provided along an outer surface of the unit box on a side opposite to the side where the air suction ports are arranged. 4. The air conditioner for a construction machine or the like according to claim 3, wherein the cool air duct forms a wall surface of a unit box and is detachable. 5. The air conditioner for a construction machine or the like according to claim 1, wherein an air outlet of the blower is provided obliquely downward. 6. The air conditioner for a construction machine or the like according to claim 1, wherein the indoor unit is installed in a console cover on a side of a driver's seat. 7. A filter attached to an air suction port of the indoor unit may be detachably mounted on a filter holding frame whose lower part is attached to a unit box by a hinge and whose upper side can be opened and closed outward by a required angle. It was turned down,
Claim 1 wherein the filter holding frame is fixed.
The air conditioner for a construction machine or the like according to any one of 2 and 5. 8. A refrigerant pipe and a hot water pipe to the indoor unit are formed such that an inner and outer connection pipe is fixedly penetrated to a flange for closing an introduction port into the cabin, and the pipes are connected to the refrigerant and the hot water pipe both inside and outside. The air conditioner for a construction machine or the like according to claim 1, wherein the air conditioner is configured.