JPH036490Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an air conditioner installed in a work vehicle such as a tractor.

(Prior Art) This type of air conditioner is usually mounted on the roof of the driver's seat, and condensed water generated in the evaporator is collected in a drain pan and discharged from a drain pipe.

Conventional air conditioners of this type were developed in 1986-70417.
As disclosed in the publication, the drainage pipe is designed to drain from the roof through the four rims forming the driver's cab, but in recent years, in order to widen the field of view of the driver's cab, drainage pipes have been drained from the front of the driver's cab. Work vehicles without rims are being produced.

(Problem to be solved by the invention) In such vehicles, if the drainage from the drain pan is discharged to the front, water will be sprayed onto the front or side windows, deteriorating visibility, so the drainage pipe is led only to the rear. If the drain is tilted forward for a long period of time, it will not be possible to drain the drain, causing the problem that the drain will overflow from the drain pan and flow into the operator's cabin.

On the other hand, Japanese Utility Model Application No. 59-102515 discloses a configuration in which a water collection groove is formed in front of the drain pan to increase the water collection capacity, but the capacity of the water collection groove formed in the drain pan is There is a limit, and if the vehicle leans forward for a long time, it will overflow.

Further, due to the characteristics of the work vehicle, it is impossible to specify which direction the water will lean in, and if it leans toward the rear where no water collection groove is formed, there is a problem that overflow will occur.

Therefore, the object of this invention is to provide an air conditioner for a work vehicle that can prevent the drain pan from overflowing even if the vehicle is tilted in any direction for a relatively long period of time.

(Means for Solving the Problems) The air conditioner for a work vehicle according to this invention includes at least an evaporator and a drain disposed below the evaporator to receive condensed water, in an air conditioning case provided on the roof of the work vehicle. In an air conditioner for a work vehicle comprising a pan and a drain pipe for discharging water collected in the drain pan, a space between the drain pan and the drain pipe extends along the periphery of the air conditioning case; It is characterized by a water storage pipe that stores the wastewater introduced from the drain pan.

(Function) The water in the drain pan is introduced into the water storage pipe before being introduced into the drainage pipe, but since the water storage pipe extends around the air conditioning case, its capacity can be increased. Therefore,
Even if it continues to tilt to one side for a relatively long time, the water storage pipe can store enough water to prevent overflow from the drain pan.

(Example) Examples of the invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, a tractor 1 serving as a working vehicle is provided with a driver's cab 3 that surrounds a driver's seat 2 and has an airtight structure. is provided.

As shown in FIGS. 2 and 3, the work vehicle air conditioner 5 includes a cooling unit 8 provided above;
The grill unit 9 is provided below the grill unit 9.

The cooling unit 8 is provided with an evaporator 10 and a blower 11 consisting of a pair of fans 11a and a motor 11b, which allows the air in the driver's cab 3 to pass through the evaporator 10 and then blows the air back into the driver's cab 3. I'm starting to do that. Evaporator 1
0 and a blower 11 are provided in the front of the vehicle in the air conditioning case 7, and a condenser device 12, which will be described later, is provided at the rear of the vehicle.

The evaporator 10 is placed on a drain pan 13 fixed to the air conditioning case 7, and condensed water generated in the evaporator 10 is collected in the drain pan 13. The drain pan 13
is extended in the shape of a gutter with a trapezoidal cross section, and drains 15a and 15b are connected to both ends thereof, so that water collected in the drain pan 13 is discharged from two locations.

The grill unit 9 includes an air intake port 16 that takes in air from inside the driver's cab 3, and an evaporator 1.
An air outlet 17 is provided to blow out the air after passing through the air.

The condenser device 12 includes a condenser 20 and a blower 2
1. It consists of a liquid tank 22, which supplies liquid cooled soot to the evaporator 10.

The water storage pipe 23 is connected to the drains 15a and 15b.
This water storage pipe 23 is connected to the air conditioning case 7.
It extends around the area to ensure sufficient water storage capacity. In this way, by surrounding the air conditioning case 7, the appearance is not spoiled, and the water storage pipe 23 can be easily installed without providing a special space. In the water storage pipe 23, a drainage pipe 24 is connected to the rear side of the vehicle via a T-shaped connector 25, so that water on either the left or right side of the water storage pipe 23 is discharged to the rear of the vehicle. .

Although it is preferable that the inner diameter of the water storage pipe 23 is as large as possible, it is determined by considering the appearance and ease of handling.

With the above configuration, the air taken in from the air intake port 16 is cooled by the evaporator 10 and then blown out from the air blowing port 17.

The condensed water adhering to the evaporator 10 falls into the drain pan 13, is collected, and is introduced into the water storage pipe 23 from the drains 15a, 15b provided on both sides of the vehicle. When the vehicle is in a substantially horizontal state, or when the front side of the vehicle is tilted upward and the rear side is tilted downward, the wastewater introduced into the water storage pipe 23 is directly discharged from the drain pipe 24 via the T-shaped connector 25. Ru.

When the front side of the vehicle is tilted downward and the rear side is tilted upward, the drain pipe 24 is at a high position and no water is discharged. However, since the water storage pipe 23 extends so as to surround the air conditioning case 7, and can obtain a considerable amount of water storage capacity, if the water storage pipe 23 is tilted to one side for a long time during work, the water storage pipe 23 This prevents overflow from the drain pan 13.

Then, when the vehicle returns to a substantially horizontal position, for example at the end of the work, the waste water stored in the water storage pipe 23 is discharged from the drain pipe 24 to the rear of the vehicle via the T-shaped connector 25.

In addition, as shown in FIG. 5, the water storage pipe 23 is
A tank 26 or a pipe with a large inner diameter is provided in the front part of the vehicle to essentially create a water storage pipe 23.
It may also be configured to increase the capacity of.

In addition, the water storage pipe 23 is doubled in the air conditioning case 7,
A similar effect can be obtained even if the water is wrapped in three layers or the like to increase the amount of water stored.

(Effects of the invention) According to this invention, since the water storage pipe that surrounds the air conditioning case is provided between the drain pan and the drainage pipe, even if the vehicle is tilted in either direction for a relatively long time, This can prevent overflow from the drain pan.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a tractor equipped with an air conditioner for a work vehicle according to this invention, Fig. 2 is a schematic vertical sectional view of an air conditioner for a work vehicle according to an embodiment of this invention, and Fig. 3 is an air conditioner for a work vehicle. A schematic cross-sectional view of the device; Figure 4 is a side view of the air conditioner for a work vehicle;
The figure is a schematic cross-sectional view of an air conditioner for a work vehicle according to another embodiment. 5... Air conditioner for work vehicle, 7... Air conditioning case, 10... Evaporator, 11... Blower, 1
3...Drain pan, 23...Water storage pipe, 24
...Drainage pipe.

Claims (1)

[Scope of utility model registration request] Inside the air conditioning case installed on the roof of the work vehicle,
at least an evaporator; a drain pan disposed below the evaporator to receive condensed water;
In the air conditioner for a work vehicle, the air conditioner includes a drain pipe for discharging water collected in the drain pan, and a drain pipe extending along the circumference of the air conditioning case between the drain pan and the drain pipe, and extending from the drain pan to the drain pipe. An air conditioner for a work vehicle characterized by being provided with a water storage pipe for storing introduced wastewater.