JP2009012687A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner adapted to suck external air and not to suck air near a floor by providing a space for sucking external air by a partition plate and switch-forming an internal/external air passages. <P>SOLUTION: A blower 31 and a heat exchanger 32 for performing heat exchange of air-conditioned air are arranged in an air-tight casing C below a seat base 23. A suction port 35 of the blower 31 in the casing C is directed to an upper surface side of the seat base 23, and a space for sucking the internal/external air is provided between the suction port 35 and the seat base 23. A partition plate 36 is arranged from the seat base 23 toward an inner air filter 34, and a space above the suction part 35 is approximately divided to two parts to form an internal air passage 37 and an internal/external air also usage passage 38. On the internal/external air also usage passage 38, a switching door 39 for performing switching/shutting off of internal air/external air is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly, to an air conditioner called a vehicle or a cabin for industrial equipment such as a construction machine such as a hydraulic excavator.

For example, a cabin for a construction machine such as a hydraulic excavator often has a space that allows a pilot to enter and operate the cabin. Since it is necessary to perform a driving operation in such a narrow cabin, it can be said that the air-conditioning equipment is indispensable for the driver regardless of the four seasons, particularly in the summer and winter.
In order to arrange the air conditioning equipment in such a narrow cabin, it is desirable that the air conditioning equipment is as compact as possible, and it is proposed that the air conditioning equipment be placed under the operator's seat as the placement location.

Therefore, there are various restrictions and problems because of such an air conditioner.
For example, in Patent Document 1, in order to eliminate the temperature distribution in the air outlet at each operation mode, the flow path downstream of the evaporator is configured as a three-layer flow of a hot air passage and a main auxiliary cold air bypass passage. The mixing part is configured in the air conditioning unit.
Moreover, in patent document 1, in order to ensure the temperature difference of a face blower outlet and a foot blower outlet in a predetermined | prescribed driving | operation mode, the max hot door provided in the warm air path and the main auxiliary | assistant cold wind bypass path, an air mix door, cold wind Each bypass door is adjusted.
Furthermore, in patent document 1, in order to set it as the structure which can apply an air conditioning wind to both feet, it is made to provide a foot blower outlet in the vehicle front side of an air conditioning unit.

JP 2006-76490 A

Further, in Patent Document 2, in order to be able to cope with a layout in which the height of the fan suction portion is low and the wind does not easily flow, in the air conditioner 1 shown in FIG. 13, the blower 3 is provided in the casing 2 in the evaporator 4. The entire air conditioner 1 is formed in a rectangular parallelepiped shape in a layout in which air is pushed into the heater core 5 and is arranged under the seat of the driver's seat, and the entire upper portion of the blower 3 is covered with the inside / outside air box 6. .
Then, in one plane of the rectangular parallelepiped shape of the air conditioner 1, when the plane is substantially divided into four, the upper and lower portions on the suction side are respectively the first quadrant 10 and the second quadrant 11, and the upper and lower portions on the discharge side are respectively When the third quadrant 12 and the fourth quadrant 13 are used, the blower 3 is disposed in the second quadrant position 11, and the evaporator 4 and the heater core 5 are disposed in the third and fourth quadrants 12 and 13.

According to such a configuration, the fan 3 fan is entirely covered with the inside / outside air box 6 and the blower 3 is located in the second quadrant position of the rectangular parallelepiped. 9, the outside air port 7 is closed, and air is sucked from the inside air port 8.
At this time, since the position of the inside air port 8 with respect to the direction of the fan scroll of the blower 3 can be located on the side of the nose where the wind is most likely to be sucked, the height of the suction portion of the blower 3 is low and the wind flows into the blower 3. Airflow can be secured even in difficult layouts.
Accordingly, it is not necessary to use a fan with a small diameter and a high speed rotation with a high noise level, so that fan noise can be reduced.
When the outside air is introduced, the outside air opening 7 of the inside / outside air switching door 9 of the air conditioner 1 is opened. Further, the door 9 covers a part of the inside air mouth 8, thereby increasing the ventilation resistance of the inside air mouth 8. It is said that air from the mouth 7 is easily introduced.
It is said.

JP 2006-192997 A

By the way, in the above air conditioners, although there is no description about a suction filter, generally, a filter is installed in the inside air port 8 and the outside air port 7.
For this reason, as a problem that occurs,
(1) The inside air filter is easily clogged. That is, since the inside air filter is close to the floor, it is easy to suck dust and dust on the floor.
(2) Even if switching to outside air suction, it is easy to suck inside air preferentially. That is, the outside air filter has a larger ventilation resistance than the inside air filter.
The present invention has been proposed in order to overcome the above-described problems, and the outside air is sucked in by providing a space for sucking the outside air by the partition plate, and the inside air sucks the air near the floor. An object of the present invention is to provide an air conditioner that can reduce the clogging of the inside air filter.

  In order to solve the above problems, the invention described in claim 1 includes a blower (31) that sucks in air and sends the air, and a heat exchanger (32) for cooling / heating the blown air. And an air conditioner comprising a casing (C) containing a blower (31) and a heat exchanger (32), and the casing (C) being disposed under a seat cradle (23) for supporting a driver's seat. In (20), the suction port (35) of the blower (31) is oriented toward the upper surface side of the seat gantry (23), and the inside and outside are interposed between the suction port (35) and the seat gantry (23) via an inside air filter (34) A space for sucking in air is provided, and a partition plate (36) is disposed in this space from the seat mount (23) toward the inside air filter (34), so that the inside air passage (37) and the inside / outside air combined passage ( 38) and the internal / external air combined passage ( 8) An outside air duct (25) for sucking outside air is connected to the air outlet, and a duct (24) for sending out cooled / heated air is connected to the air outlet (33) on the heat exchanger (32) side. The air / air passage (38) shuts off the outside air from the outside air duct (25) and sends only the inside air through the inside air filter (34) to the suction port (35) of the blower (31), while blocking the inside air. And a switching door (39) for sending outside air from the outside air duct (25) to the suction port (35) of the blower (31) through the inside air filter (34).

As a result, in the operating status, usage status, and environment, the switching door (39) is operated to switch the space above the suction port (35) of the blower (31) that faces the seat pedestal (23), so that the inside air The internal passage and the external air can be switched and introduced into the heat exchanger (32) by switching the internal passage and the internal and external passage (38).
At that time, since the suction port (35) of the blower (31) is directed upward and does not suck in the inside air near the floor, clogging of the inside air filter (34) can be reduced.

  Further, the invention described in claim 2 is a blower (31) that sucks in air and sends the air, a heat exchanger (32) for cooling / heating the blown air, a blower (31), and heat In an air conditioner (20) comprising a casing (C) containing an exchanger (32) and disposing the casing (C) under a seat cradle (23) for supporting a driver's seat, a blower ( 31) The suction port (35) of 31) is directed to the upper surface side of the seat base (23), and a space for sucking inside and outside air is provided between the suction port (35) and the seat base (23). A partition plate (36) is disposed from (23) toward the suction port (35), and an outside air duct (25) for sucking outside air is connected to the suction port (35) of the blower (31), while the blower (31). Towards the inlet (35) 6), an internal air duct (40) is disposed so as to protrude from the seat mount (23), and an internal air filter (41) is mounted on the top of the internal air duct (40). .

  As a result, the inside air filter (41) at the top of the inside air duct (40) is located above the seating surface of the seat (22), so that in both the inside air introduction operation and the outside air introduction operation, from the position of the filter from the floor surface. Since it is located at a much higher position, there is no risk of sucking dust or the like near the floor surface, and clogging of the inside air filter (41) can be further reduced.

  According to a third aspect of the present invention, a filter maintenance door (50) is provided in the casing (C).

  Thereby, not only the periodic inspection of the inside air filter (34) at the suction port (35) of the blower (31) but also the case where the inside air filter (34) is clogged, the filter maintenance door ( By opening 50), it becomes easy to clean or replace the inside air filter (34), and the maintainability of the filter is improved.

  The invention according to claim 4 is characterized in that an outside air filter (30) is attached to the outside air inlet (26) at the tip of the outside air duct (25).

  Thereby, an air conditioner (20) can be drive | operated also in a bad working environment with much dust.

  The invention according to claim 5 is characterized in that it is used for construction machines such as a hydraulic excavator.

  Thereby, the use of the present invention becomes more concrete.

  Further, the invention of claim 6 is used in a vehicle.

  Thereby, the versatility of the air conditioner (20) of the present invention can be expected.

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

FIG. 1 and FIG. 2 show an example in which the air conditioner 20 according to the first embodiment of the present invention is mounted on a cabin 21 of a hydraulic excavator, for example.
The air conditioner (HVAC) 20 is disposed under the seat 22 and under the seat mount 23 of the pilot P seat. Although details will be described later on the front and rear sides of the seat 22 in the cabin 21, an air outlet is provided from the air conditioner 20 through the duct 24, and outside air is supplied to the rear and lower side surfaces of the air conditioner. 20 is provided with an outside air duct 25 and an outside air inlet 26 is provided on the outer wall surface of the cabin 21.
That is, a face (FACE) front outlet 27 that blows out toward the upper half of the operator P is disposed in the duct 24a that extends forward, in front of the right side of the vehicle.
On the other hand, in the duct 24b extending rearward, two face (FACE) rear air outlets 28 and 29 that are blown out toward the rear side of the upper body of the operator P are disposed at the rear of the vehicle.
An outside air filter 30 is attached to an outside air inlet 26 provided on the outer wall surface of the cabin 21 for taking outside air into the air conditioner 20 through the outside air duct 25.

In the cabin 21 as described above, the intake of the inside air is performed from the rear left side of the vehicle adjacent to the outside air duct 25 under the vehicle seat 22 and under the seat mount 23.
The face (FACE) front outlet 27 in the duct 24a extending forward and the two face (FACE) rear outlets 28 and 29 in the duct 24b extending rearward are examples, and the present invention is not limited thereto. Of course, it can be set as appropriate according to the arrangement in the cabin 21 and the operational requirements.

Next, FIGS. 3 and 4 show the internal layout of the air conditioner 20 itself.
The air conditioner 20 includes a blower 31 and a heat exchanger 32 that performs heat exchange of the conditioned air in an airtight casing C below the seat base 23.

The casing C is connected with a duct serving as a passage for air. That is, the outside air duct 25 is connected to the blower 31 side in the casing C, and the duct 24 is connected to the air outlet 33 on the heat exchanger 32 side.
The outside air duct 25 is connected to the suction port 35 of the blower 31 through the inside air filter 34. In this case, the suction port 35 is directed to the upper surface side of the seat base 23.
Further, a space for sucking the inside and outside air is defined between the suction port 35 and the seat mount 23.

A partition plate 36 is disposed from the seat base 23 toward the inside air filter 34, and the space above the suction port 35 is substantially divided into two to form an inside air passage 37 and an inside / outside air combined passage 38, respectively.
Among these, the inside / outside air combined passage 38 has a two-stage structure on the vehicle rear side, and a switching door 39 is provided between the two-stage structure for switching / blocking between the inside air and the outside air (FIGS. 6 and 6). 7).
An outside air duct 25 is connected to the lower part of the two-stage structure.
On the other hand, the upper part is a space / door movable range for switching between the inside air and the outside air by switching the switching door 39.

The blower 31 includes a fan as a known sirocco fan, a spiral blower casing, and an electric motor that rotationally drives the fan.
Further, the heat exchanger 32 includes an evaporator 32a and a heater core 32b as temperature adjusting devices disposed in the casing C.

  The air conditioner 20 according to the first embodiment is as described above, and this operation will be described next. In this air conditioner 20, in the operating condition, usage condition, and environment, by switching the switching door 39 in the space from the top of the suction port 35 of the blower 31 to the seat base 23, the inside air passage 37, the inside and outside air The shared passage 38 can be switched and the inside air and the outside air can be switched and introduced to the suction port 35 side of the blower 31.

First, at the time of the inside air introduction operation, as shown in FIG. 7, the switching operation of the switching door 39 is performed to block the passage from the outside air duct 25 to the inside air filter 34 in the inside / outside air combined passage 38.
Thereby, the inside air in the cabin 21 is introduced to the blower 31 side through the inside air filter 34 and the suction port 35 through the space above the inside / outside air combined passage 38, while the inside air filter 34 and the suction port are introduced through the inside air passage 37. It is introduced into the blower 31 through 35.

  During the outside air introduction operation, the switching door 39 is switched (see FIG. 6). As a result, in the inside / outside air combined passage 38, the outside air duct outlet is opened by the switching door 39 and the hole serving as the inside air inlet is closed, so that the inside air is introduced into the blower 31 through the inside air filter 34 and the suction port 35. Installation is blocked. Since the inside / outside air combined passage 38 is substantially partitioned by the partition plate 36, the outside air is preferentially introduced. The inside air is continuously introduced into the blower 31 through the inside air filter 34 and the suction port 35 from the inside air passage 37.

As described above, in any operation, the suction port 35 of the blower 31 is directed upward, and the inside air in the vicinity of the floor is not sucked. Therefore, the clogging of the inside air filter 34 and the like can be reduced.
In addition, since the outside air inlet 30 at the tip of the outside air duct 25 for introducing outside air is mounted with the outside air filter 30, the air conditioner 20 can be operated even in a dusty and poor working environment.

The air conditioner 20 according to the present invention can also be implemented by the second embodiment.
That is, as shown in FIGS. 8 and 9, in the air conditioner 20, the partition plate 36 is sandwiched toward the air inlet 35 of the blower 31, adjacent to the outside air duct 25, and the interior of the cabin 21. The inside air duct 40 is disposed so as to protrude to the top, and the inside air filter 41 is mounted on the top.
In this case, since the inside air filter 41 at the top of the inside air duct 40 is above the seating surface of the seat 22, the position of the inside air filter 41 is much higher from the floor surface (see FIGS. 10 and 11). ) In both the inside air introduction operation and the outside air introduction operation, there is no risk of sucking dust or the like at a position near the floor surface, and the clogging of the inside air filter 41 can be further reduced.

The air conditioner 20 according to the present invention can also be implemented by the third embodiment.
That is, as shown in FIG. 12, the filter maintenance door 50 can be provided in the casing C.

According to such a structure, not only the periodic inspection of the inside air filter 34 at the suction port 35 of the blower 31 but also the case where the inside air filter 34 is clogged, by opening the filter maintenance door 50 in the casing C, The inside air filter 34 can be easily cleaned or replaced, and the maintainability of the filter is improved.
Moreover, since it is not necessary to install the switching door 39 in the air conditioner 20, the number of parts can be reduced.
Furthermore, there is no need to provide a through-hole for taking in the inside air in the seat pedestal 23, and even if the seat pedestal 23 is made thin, the strength can be secured, leading to cost reduction.

As mentioned above, although various embodiment was shown and demonstrated about the air conditioner 20 concerning this invention, of course, this invention is not restricted to the above-mentioned embodiment.
For example, the air conditioner 20 is disposed under the seat of the pilot's seat, but may be another location such as a ceiling above the pilot's head.

  Moreover, although the example which applied the air conditioner 20 of this invention to the hydraulic shovel car was shown, for example, general purpose vehicles, such as a construction work machine vehicle different from this, such as a crane car, or a bus, etc. The present invention may be applied to a construction machine or equipment that does not travel, such as a crane, and the application target of the present invention is not limited to a hydraulic excavator.

It is typical explanatory drawing which mounted the air-conditioner concerning this invention in the cabin of the hydraulic shovel car. It is typical side surface explanatory drawing of the cabin shown in FIG. It is a typical explanatory view of a 1st embodiment of an air-conditioner concerning the present invention. It is a top view from the A direction of the air conditioner shown in FIG. It is sectional explanatory drawing along the AA line in FIG. It is sectional explanatory drawing along the BB line in FIG. It is sectional explanatory drawing along the BB line in FIG. It is typical explanatory drawing of 2nd Embodiment of the air conditioner concerning this invention. It is a top view from the B direction of the air conditioner shown in FIG. It is typical explanatory drawing which mounted the air conditioner shown in FIG. 8 in the cabin of the hydraulic shovel car. It is typical side surface explanatory drawing of the cabin shown in FIG. It is typical explanatory drawing of 3rd Embodiment of the air conditioner concerning this invention. It is a plane sectional view showing a schematic structure of a conventional air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Air conditioner 21 Cabin 22 Seat 23 Seat mount 24, 24a, 24b Duct 25 Outside air duct 26 Outside air inlet 27 Front outlet 28, 29 Rear outlet 30 Outside air filter 31 Blower 32 Heat exchanger 32a Evaporator 32b Heater core 33 Outlet 34 Inside air filter 35 Suction port 36 Partition plate 37 Inside air passage 38 Inside / outside air combined passage 39 Switching door 40 Inside air duct 41 Inside air filter 50 Filter maintenance door C Casing

Claims (6)

A blower (31) that sucks in air and sends the air, a heat exchanger (32) for cooling / heating the blown air, and the blower (31) and the heat exchanger (32) are accommodated. In an air conditioner (20) comprising a casing (C) and arranging the casing (C) under a seat cradle (23) for supporting a driver's seat,
The air inlet (35) of the blower (31) is directed to the upper surface side of the seat base (23),
A space is provided between the suction port (35) and the seat pedestal (23) for sucking inside and outside air through an inside air filter (34), and the inside air filter (34) is provided in the space from the seat gantry (23). ) And a partition plate (36), and is divided into an inside air passage (37) and an inside / outside air combined passage (38),
An outside air duct (25) for sucking outside air is connected to the inside / outside air combined passage (38), and a duct (33) for sending out cooled / heated air to the outlet (33) on the heat exchanger (32) side. 24)
The inside / outside air combined passage (38) blocks the outside air from the outside air duct (25) and sends only the inside air to the suction port (35) of the blower (31) through the inside air filter (34). ,
A switching door (39) is provided in which the inside air is shut off and the outside air from the outside air duct (25) is sent to the suction port (35) of the blower (31) via the inside air filter (34). A featured air conditioner. A blower (31) that sucks in air and sends the air, a heat exchanger (32) for cooling / heating the blown air, and the blower (31) and the heat exchanger (32) are accommodated. In an air conditioner (20) comprising a casing (C) and arranging the casing (C) under a seat cradle (23) for supporting a driver's seat,
The air inlet (35) of the blower (31) is directed to the upper surface side of the seat base (23),
A space for sucking inside and outside air is provided between the suction port (35) and the seat frame (23), and a partition plate (36) is formed in the space from the seat frame (23) toward the suction port (35). )
While connecting the outside air duct (25) for sucking outside air to the suction port (35) of the blower (31),
An internal air duct (40) is disposed so as to protrude from the seat mount (23) across the partition plate (36) toward the suction port (35) of the blower (31),
An air conditioner characterized in that an internal air filter (41) is mounted on the top of the internal air duct (40).   The air conditioner according to any one of claims 1 and 2, wherein a filter maintenance door (50) is provided in the casing (C).   The air conditioner according to any one of claims 1 to 3, wherein an outside air filter (30) is attached to the outside air inlet (26) at the tip of the outside air duct (25). .   The air conditioner according to any one of claims 1 to 4, wherein the air conditioner is used for a construction machine such as a hydraulic excavator.   The air conditioner according to any one of claims 1 to 4, wherein the air conditioner is used in a vehicle.

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