JPH0542351U - Duct structure of an air conditioner for construction vehicles - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] An air conditioning duct for a construction vehicle air conditioner designed to improve the efficiency of cooling and heating by blowing out cool and warm air at the most effective location for the operator. I will provide a. [Structure] Blow-out ducts 12, 15 and 17 are provided on the upper surface of the air conditioning case 7 at the rear of the driver's seat, the lower front end of the electrical panel 5 on the driver's side and the upper surface of the electrical panel, respectively, and branch ducts 11 and 1 are provided.
3, 16 and the chambers 10 and 14 provided with a damper mechanism are arranged, and these damper mechanisms are switched according to cooling and heating, and the cool air is evenly distributed to the outlets on the upper surface of the air conditioning case and the upper surface of the electrical equipment panel. The hot air is distributed and supplied, and the hot air is supplied to the air outlet at the front end of the lower part of the electrical equipment panel, and a part of the hot air is supplied to the air outlet on the upper surface of the air conditioning case.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a duct structure of an air conditioner for a construction vehicle in which optimum outlets for cooling and heating in a driver's cab are provided and outlets for supplying distributed cool air and warm air are arranged.

[0002]

[Prior Art]

 In recent years, an air conditioner (hereinafter simply referred to as an air conditioner) has been installed in a driver's cab in order to improve the working environment of an operator in a construction vehicle. However, in a construction vehicle, especially a hydraulic excavator, Installing an air conditioner that requires a space for operating the work lever while viewing the work situation by the window interferes with visibility and installation and operation of operating equipment. The air conditioner b 1 is usually installed in the rear part of the driver's seat c. According to the law of natural convection that cool air goes down and warm air goes up, cold air outlets d are installed on the left and right of the upper surface of the air conditioning case e, and the cold air goes up behind the driver's seat c as shown by the white arrow in the figure. Then, the air circulates in the room while descending in front of the driver's seat c, and the warm air outlet f is provided in the lower part of the front surface of the case e. It circulates forward and circulates indoors while heating the upper body from the feet of operator g.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional air conditioner b, since the outlet d of the cool air is located at the upper rear part of the driver's seat c, the cool air circulates over the shoulder of the operator g, so that the shoulder is too cold and the cool air circulated upward. Although it descends along the front window to cool its feet, there is a problem that it does not circulate in the front of the upper body, which feels the most cooling.

Further, since the hot air outlet f is located in the rear part of the driver's seat c, there is a problem that the warm air circulates upward from the side of the driver's seat c without necessarily warming the feet. The circulated warm air drops along the rear window j from the ceiling and is sucked into the air conditioner b, and the temperature is significantly lowered by the radiative cooling by the rear window h. Therefore, the temperature of the front and back of the operator g is significantly reduced. There is a problem that the difference becomes large and discomfort occurs. Further, as described above, the warm air does not reach the front window h and circulates upward from the side of the driver's seat c, resulting in a defroster effect, that is, the effect of removing the cloud of the front window h cannot be obtained.

The present invention has been made for the purpose of remedying the above-mentioned problems, and is for a construction vehicle which is the most effective place for cooling and heating and which is provided with an outlet for supplying distributed cool air and warm air. It is intended to provide a duct structure for an air conditioner.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention branches a main duct from an air conditioner installed at the rear of a driver's seat through a first chamber, and one of the branch ducts extends to the upper surface of the air conditioning case and blows out. A mouth is provided, the other extends inside the electrical panel on the side of the driver's seat to the vicinity of the lower part of the front end, and is further branched through the second chamber, and one is adjacent to the chamber and forward and inward. In addition to providing a blow-out port for the other side and extending the other side to the upper surface of the electrical equipment panel to provide a blow-out port, the dampers of the first and second chambers are switched according to cooling and heating to cool the air during cooling. The air is uniformly distributed to the air outlets on the upper surface of the air conditioning case and the air outlets on the upper surface of the electrical equipment panel to supply hot air for heating to the air outlets on the lower front end of the electric equipment panel, and a part of the hot air is supplied to the air conditioner. Supply to the outlet on the top of the case It was accomplished to.

[0007]

[Action]

 Therefore, the damper mechanisms of the first and second chambers are switched according to cooling and heating, and the cool air and warm air from the air conditioner are distributed and supplied to the predetermined outlets through the main duct and the branch duct. Cool air blows out evenly from the top of the electrical panel on the side of the driver's seat and circulates in the room, especially the front of the operator's upper body. Also, during warming, warm air blows from the lower front end of the electrical panel on the driver's side to heat the feet of the operator, and part of the warm air circulates upward from the top of the air conditioning case along the operator's back. Therefore, the front and back of the operator will be heated together without being affected by the radiative cooling by the back window of the returning warm air.

[0008]

【Example】

 Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings 1 to 5. In FIG. 1, reference numeral 1 denotes a driver's cab mounted on the upper surface of a vehicle body frame 2, and a front window 1a and a rear window 1b are attached to the driver's cab 1 as shown in the figure. The door has a side window on the other side. An operator's seat 3 having an operation lever 4 on the side is installed in the room, an electric panel 5 is installed at the side window of the driver's seat 3, and an air conditioner 6 is installed in the rear. The air unit 8 housed in the air conditioning case 7 is provided with an air inlet (not shown), a cooler core, a heater core, an electric motor, etc., and cool air and warm air from the air conditioning unit 8 are driven by these components. It is discharged to the main duct 9 which is projected from the nozzle 7. A first chamber 10 is provided in the main duct 9. The chamber 10 branches the main duct 9, and one branch duct 11 is further branched into bifurcated ducts 11a and 11b. Moreover, outlets 12a and 12b are provided so as to extend on the upper surface of the air conditioning case 7.

The other branch duct 13 extends inside the lower edge of the electrical equipment panel 5 to the vicinity of the front end, and the second chamber 14 is attached to the front end. By this second chamber 14, the branch duct 13 from the first chamber 10 is further branched, and on the other hand, the outlet duct 15 is provided adjacent to the front part of the second chamber 14 toward the front and the inside. The other branch duct 16 extends upward in the electrical component panel 5, and an outlet 17 is provided on the upper surface of the electrical component panel 5.

The first chamber 10 attached to the main duct 9 is provided with the first damper mechanism 18, and the opening / closing plate 20 is swingable around the shaft pin 22 as a fulcrum. The inlets 23 and 24 of 11 and 13 are selectively opened and closed. The opening / closing plate 20 is provided with an opening 20a at a substantially central portion as shown in FIG. 3 (A), or as shown in FIG. The opening / closing plate stopper 11a is formed so that the opening / closing plate 20 is not completely closed even when the inlet 23 is closed, and the gap S is secured. Similarly, the second chamber 14 is also provided with a second damper mechanism 19 so that the opening / closing plate 25 can be swung by the lever 26 with the shaft pin 27 as a fulcrum. The 16 inlets 28 and 29 are selectively opened and closed. The levers 21 and 26 of the first and second damper mechanisms 18 and 19 are connected by an interlocking wire 30, and the opening and closing plates of the first and second damper mechanisms 18 and 19 are operated by an operating means (not shown). 20 and 25 are linked to open and close.

Next, the procedure for supplying cool air and warm air to the outlets 12, 15, 17 during cooling and heating in the duct structure configured as described above will be described with reference to FIGS. 5 (A) and 5 (B). First, (A) shows the supply of cold air during cooling, and by operating the lever 21 of the first damper mechanism 18 from the shaded position to the solid line position, the opening / closing plate 20 rotates clockwise and the first position is shown. At the same time as it is located in the middle of dividing the chamber 10, the lever 30 of the second damper mechanism 19 of the second chamber 14 is interlocked and pulled by the wire 30 to rotate the opening / closing plate 25 to the position where the shadow line is a solid line. As a result, the inlet 28 of the outlet 15 is closed and the inlet 29 of the branch duct 16 is opened. By switching between the first and second damper mechanisms 18 and 19, the cold air is evenly distributed from the main duct 9 through the first chamber 10, and one is supplied from the branch duct 11 to the left and right outlets 12 and 12 on the upper surface of the air conditioning case 7. As shown by the white arrow in FIG. 1, the air is circulated from the upper surface of the air conditioning case 7 to the upper side, and then descends from the ceiling along the front window 1a to cool the inside of the room, and the other side is branched from the other branch duct 13 to the second chamber. It enters into the branch duct 16 via 14 and is supplied to the outlet 17 on the upper surface of the electrical equipment panel 5 to rise while cooling the front of the operator's upper body, and joins the cool air from the upper surface of the air conditioning case 7 in the room. Circulate.

Further, (B) shows the supply of warm air during heating, and the opening / closing plate 20 is opened by operating the lever 21 in the direction of the shaded line, contrary to the case of cooling the first damper mechanism 18. It rotates like a shaded line to close the inlet 23 of the branch duct 11 and open the inlet 24 of the other branch duct 13, but as shown in FIG. A part of hot air enters the branch duct 11 closed from the opening 20a and is supplied to the left and right outlets 12, 12 on the upper surface of the air conditioning case 7. In FIG. 6B, as another example of the opening 20a of the opening / closing plate 20, a gap (S) is secured in the closing plate 20 that is closed by the stopper 11a, and a part of the warm air flows in this gap. After passing through (S), it enters the branch duct 11, and is supplied to the left and right outlets 12 and 12 on the upper surface of the air conditioning case 7 as described above. As described above, the warm air from the main duct 9 is supplied to the other duct 13, but the distribution amount supplied to the outlets 12, 12 on the upper surface of the air conditioning case 7 is 10 as a suitable numerical value in the experiment in this embodiment. The optimum range is 15% and the acceptable range is 10 to 25%. The blowing of the supplementary warm air from the upper surface of the air conditioning case 7 is for eliminating the temperature difference between the front and rear surfaces of the operator due to the radiative cooling by the rear window 1b of the returning warm air by the rear window 1b as described above. The auxiliary warm air joins the return warm air to prevent the temperature from decreasing.

On the other hand, the hot air that has entered the second chamber 14 from the first chamber 10 via the other branch duct 13 closes the inlet 29 of the branch duct 16 by the interlocking of the second damper mechanism 19, and the outlet 15 By opening the inlet 28, the air is supplied to the outlet 15, and warm air is blown toward the front and inward while warming the feet of the operator along the front window 1a as shown by the black arrow in FIG. It rises while circulating, and then returns as warm air and descends along the rear window 1b. The defroster effect is obtained by the circulation of the warm air along the front window 1a.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it is the most effective location for cooling and heating. The front of the operator's upper body and feet are able to experience cool air or warm air at an early stage, which improves the efficiency of cooling and heating. In particular, part of the warm air is blown out from the outlet on the top of the air conditioning case, and the temperature difference between the front and back of the operator due to radiative cooling by the back window of the returning warm air is eliminated, resulting in more comfortable heating. Thus, as the working environment of the operator is further improved due to the improvement of the cooling and heating efficiency, the working efficiency is also improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a circulating condition of cold air and warm air in an air conditioner for a construction vehicle according to the present invention.

FIG. 2 is a perspective view showing an arrangement of an air conditioning duct according to the present invention.

FIG. 3A is an enlarged cross-sectional view of the first chamber,
(B) is an enlarged cross-sectional view of the first chamber showing the other embodiment.

FIG. 4 is an enlarged sectional view of a second chamber.

FIG. 5A is an explanatory diagram showing a cold air supply route during cooling, and FIG. 5B is an explanatory diagram showing a warm air supply route during heating.

FIG. 6 shows cold air in a conventional air conditioner for a construction vehicle,
It is explanatory drawing which shows the circulation condition of warm air.

[Explanation of symbols]

 1 Driver's Cab 1a Front Window 1b Rear Window 2 Driver's Seat 5 Electrical Panel 6 Air Conditioner (Air Conditioner) 7 Air Conditioning Case 9 Main Duct 10 First Chamber 11, 13, 16 Branch Duct 11a Stopper 12, 15, 17 Outlet 14 2nd chamber 18 1st damper mechanism 19 2nd damper mechanism 20,25 Open / close plate 20a Opening 21,26 Lever 30 Wire

Claims (5)

[Scope of utility model registration request] 1. A main duct from an air conditioner installed at a rear portion of a driver's seat is branched via a first chamber, and one of the branch ducts is extended to a top surface of a case of the air conditioner to form an outlet. The other is extended to the vicinity of the lower part of the front end in the electric panel on the side of the driver's seat and further branched via the second chamber, and one is sucked out in the front and inward direction adjacent to the chamber. An opening is provided, and the other is extended to the upper surface of the electrical equipment panel to provide an outlet, and the dampers of the first and second chambers are switched according to cooling and heating to cool the cool air during the air conditioning. Evenly distributed and supplied to the outlet on the upper surface of the device case and the outlet on the upper surface of the electrical component panel,
A construction vehicle, characterized in that hot air during heating is supplied to an outlet at a lower front end of the electrical equipment panel, and a part of the warm air is distributed and supplied to an outlet on an upper surface of the air conditioner case. Duct structure for air conditioner. 2. The duct structure for an air conditioner for a construction vehicle according to claim 1, wherein opening and closing operations of the damper mechanisms of the first and second chambers are interlocked with each other. 3. The construction vehicle according to claim 1, wherein the amount of warm air supplied to the outlet on the upper surface of the air conditioner case is 10% to 25% of the amount supplied to the outlet on the lower front end of the electrical component panel. Air conditioner duct structure. 4. The damper opening / closing plate of the first chamber is provided with an opening through which the required supply amount passes, as a part of the means for supplying the warm air to the upper surface of the air conditioner case. Duct structure for air conditioners for construction vehicles. 5. As a part of the means for supplying the warm air to the upper surface of the air conditioner case, there is provided a closing stopper that secures a gap through which the required supply amount passes in the closed state of the damper opening / closing plate of the first chamber. The duct structure of the air conditioner for construction vehicles that features.