Unit cooler

Abstract

To provide a unit cooler which can supply cold air to the outside of a housing and eliminates a possibility that electric current flows to the outside even if dew condensation water occurs in an air conditioning part.SOLUTION: In a unit cooler of the invention, a through hole 12g through which dew condensation water occurring at an air conditioning part 300 is drained is provided penetrating through a base plate 102 to which the air conditioning part 300 is fixed. A drain passage 11i is recessed at an undercover 101 provided below the base plate 102. The drain passage 11i is provided forming a predetermined space between itself and a plurality of fastening members 701a to 701f.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a unit cooler. [Background technology]

[0002] A conventional unit cooler is disclosed in Patent Document 1. This unit cooler is used in industrial vehicles, such as forklifts, that have a power source.

[0003] According to Patent Document 1, this unit cooler includes a housing and an air conditioning unit housed in the housing. The air conditioning unit has an electric compressor, a condenser, a pressure reducing device, an evaporator, and a control device, and constitutes a refrigeration cycle. The evaporator is provided with an outlet duct. The housing has a first cover that houses the electric compressor, the condenser, the pressure reducing device, and the evaporator, a second cover that houses the control device, a mounting plate, and a flat plate. The first cover that houses the electric compressor, the condenser, the pressure reducing device, and the evaporator, and the second cover that houses the control device are fixed onto the mounting plate with bolts. The flat plate is fixed to the industrial vehicle with bolts. Anti-vibration rubber is provided between the mounting plate and the flat plate, and the mounting plate, anti-vibration rubber, and flat plate are fixed together with bolts.

[0004] In this unit cooler, for example, in an industrial vehicle that does not have the means to reduce vibration that passenger cars have, the electric compressor in the air conditioning unit is operated by a power source to cool the air and supplies the cooled air from the outlet duct to the outside of the housing. During this time, the vibration-proof rubber prevents vibrations during driving or operation in the industrial vehicle from being transmitted to the electric compressor in the first cover and the control device in the second cover, reducing malfunctions of these. The vibration-proof rubber also absorbs vibrations from the electric compressor, contributing to quieter operation. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-83464 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned conventional unit cooler, if condensation occurs in the air conditioning section, the condensation flows through the vibration-proof rubber, and there is a risk that the current in the air conditioning section will flow to the outside via the vibration-proof rubber.

[0007] The present invention has been made in consideration of the above-mentioned conventional situation, and has as its object to provide a unit cooler that is capable of supplying cool air to the outside of a housing and that does not pose the risk of electric current flowing to the outside even if condensation occurs in the air conditioning section. [Means for solving the problem]

[0008] The unit cooler of the present invention comprises a housing and an air conditioning unit that is accommodated in the housing, forms a refrigeration cycle, and cools air and supplies the cooled air to the outside of the housing; The housing includes: a base plate to which the air conditioning unit is fixed and having a through hole through which condensation water generated in the air conditioning unit is discharged; an undercover provided below the base plate and fastened to an outer periphery of the base plate by a plurality of fastening members via an insulating member; The undercover is provided below the through hole and has a drainage channel recessed therein for guiding the condensation water to the outside of the housing, The drainage channel is characterized in that it is provided at a predetermined distance from the multiple fastening members.

[0009] In the unit cooler of the present invention, the air conditioning section forms a refrigeration cycle, cools air, and supplies the cooled air to the outside of the housing.

[0010] In this unit cooler, a through hole is formed in the base plate to which the air conditioning unit is fixed, and an undercover provided below the base plate is fastened to the outer periphery of the base plate by a plurality of fastening members via an insulating member. A drainage channel is provided below the through hole in the undercover and recessed to guide condensation water to the outside of the housing. Therefore, if condensation water occurs in the air conditioning unit, the condensation water falls from the base plate through the through hole onto the undercover and is drained to the outside through the drainage channel of the undercover. At this time, the drainage channel is provided at a predetermined interval from the plurality of fastening members, so the condensation water does not flow through the fastening members.

[0011] Therefore, according to the unit cooler of the present invention, it is possible to supply cool air to the outside of the housing, and even if condensation occurs in the air conditioning section, there is no risk of current flowing to the outside.

[0012] The undercover preferably has an inclined surface that is inclined so that condensation water is guided from the fastening member side toward the drainage channel. In this case, the condensation water flows down the inclined surface by its own weight, making it difficult for the condensation water to flow to the fastening member and easy for the condensation water to flow into the drainage channel and collect there.

[0013] It is preferable that the drainage channel extends to at least one end of the undercover, in which case condensed water can be easily discharged to the outside from the end.

[0014] It is also preferable that the drainage channel has an inclined surface within the channel for guiding the condensation water that has fallen from the through hole to the end portion. In this case, the condensation water is easily collected within the drainage channel and discharged to the outside.

[0015] The insulating member is preferably a rubber material that also has vibration-proofing properties. In this case, it is possible to suppress the transmission of vibration to the air conditioning unit on the base plate, thereby reducing the risk of the air conditioning unit breaking down, and also to absorb the vibration of the air conditioning unit, thereby contributing to quietness.

[0016] The air conditioning unit may have an electric compressor, a condenser, a pressure reducing device, an evaporator, a first fan that blows air to the condenser, a second fan that blows air to the evaporator, and a control device that controls the electric compressor, the first fan, and the second fan. It is preferable that the first fan adjacent to the condenser is provided at one end of the base plate, the second fan adjacent to the evaporator is provided at the other end of the base plate, and the electric compressor is provided between the first fan and the second fan. Furthermore, the fastening members may have a pair of first fastening members provided with the first fan sandwiched therebetween, a pair of second fastening members provided with the second fan sandwiched therebetween, and a pair of third fastening members provided with the electric compressor sandwiched therebetween. It is preferable that the through hole is opened at a position overlapping with the intersection of the diagonal lines connecting the second fastening member and the third fastening member. In this case, even if a large amount of condensed water is generated in the air conditioning unit, the condensed water is unlikely to reach each fastening member and is likely to fall from the through hole onto the undercover. For this reason, the effects of the present invention are easily achieved.

[0017] If the air conditioning unit has an accumulator, the accumulator is preferably disposed in the region between the second fastening member and the third fastening member. In this case, wasted space is unlikely to be generated within the housing, and the unit cooler can be made smaller. Effect of the Invention

[0018] According to the unit cooler of the present invention, it is possible to supply cool air to the outside of the housing, and even if condensation occurs in the air conditioning section, there is no risk of current flowing to the outside. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a side view of a forklift equipped with a unit cooler according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the unit cooler of the embodiment. [Diagram 3] FIG. 3 is a plan view of the unit cooler of the embodiment with a top cover and a top plate removed. [Figure 4]FIG. 4 is a plan view of an undercover of the unit cooler of the embodiment. [Diagram 5] FIG. 5 is a cross-sectional view of the structure, under-cover, under-rail, etc. of the unit cooler of the embodiment. [Figure 6] FIG. 6 is a cross-sectional view of the structure and the undercover of the unit cooler of the embodiment, taken in a direction different from that of FIG. [Figure 7] FIG. 7 is a cross-sectional view of a fastening member in the unit cooler of the embodiment. [Figure 8] FIG. 8 is an enlarged cross-sectional view of a portion of the unit cooler according to the embodiment that is attached to a forklift. [Figure 9] FIG. 9 is a cross-sectional view similar to FIG. 6 of the structure and the undercover in the unit cooler of the first modified example. [Figure 10] FIG. 10 is a cross-sectional view similar to FIG. 6 of the structure and the undercover in the unit cooler of the second modified example. [Figure 11] FIG. 11 is a plan view of a head guard and a unit cooler of the embodiment according to another forklift. [Figure 12] FIG. 12 is a perspective view of the head guard and the unit cooler of the forklift shown in FIG. 11 as viewed from the front. [Figure 13] FIG. 13 is a plan view similar to FIG. 11, in which the mounting position of the unit cooler of the embodiment is changed. [Figure 14] FIG. 14 is a plan view similar to FIG. 11, but showing a further change in the mounting position of the unit cooler of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] (Example) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, a unit cooler 1 of the embodiment is fixed on a head guard 3a of a reach-type electric forklift 3, which is an industrial vehicle. The forklift 3 has a battery 3b as a power source, and is operated by a driver M to run and perform loading and unloading work using power supplied from the battery 3b.

[0021] 2, the unit cooler 1 includes a housing 100, an air conditioning section 300, and a cool air guide section 500. The housing 100 includes an undercover 101, a base plate 102, a top plate 103, and a top cover 104.

[0022] The undercover 101 is made of metal. The undercover 101 has a rectangular bottom plate 101a and peripheral walls 101b that rise upward from the four sides of the bottom plate 101a and are connected to each other. As shown in FIG. 4, six bolt holes 11a to 11f and two air outlets 11g and 11h are provided through the bottom plate 101a. In FIG. 4, three bolt holes 11a to 11f are provided along one long side and three bolt holes 11g to 11h are provided along the other long side from the center of the bottom plate 101a to the left, and the air outlets 11g and 11h are provided above and below in the right area of ​​the bottom plate 101a. The intervals between the three bolt holes 11a to 11c along one long side are equal, and the intervals between the three bolt holes 11d to 11f along the other long side are also equal. It should be noted that bolt hole 11b may be biased toward either bolt hole 11a or bolt hole 11c, and bolt hole 11e may be biased toward either bolt hole 11d or bolt hole 11f.

[0023] The bottom plate 101a is formed with a drain groove 11i extending from the middle of the short side to both ends in parallel with the long side. The drain groove 11i is formed by forming a part of the bottom plate 101a in a gutter shape. As shown in FIG. 5, the upper surface of the bottom plate 101a is an inclined surface 11p that slopes downward toward the drain groove 11i. The drain groove 11i corresponds to a drainage channel. Pipes 11m and 11q that penetrate the peripheral wall 101b are provided at both ends of the drain groove 11i. As shown in FIG. 3, drain hoses 11n and 11r that are connected to the outside without getting in the way are connected to the pipes 11m and 11q. The pipes 11m and 11q may be provided on the bottom wall of the drain groove 11i.

[0024] The base plate 102 is made of metal. As shown in Fig. 2, the base plate 102 is a rectangular flat plate whose long sides are shorter than those of the bottom plate 101a of the undercover 101. Six bolt holes 12a-12f that mate with the bolt holes 11a-11f of the undercover 101 are formed through the base plate 102. In Fig. 3, three of the bolt holes 12a-12f are provided along one long side and three are provided along the other long side.

[0025] As shown in Figs. 3 and 4, a through hole 12g is provided at approximately the center of the base plate 102. The through hole 12g is located at the intersection of diagonal lines of four bolt holes 11b, 12b, 11c, 12c, 11e, 12e, 11f, and 12f that exist around the through hole 12g, and is equally spaced apart from the bolt holes 11b, 12b, 11c, 12c, 11e, 12e, 11f, and 12f. As shown in Figs. 4 to 6, a drain groove 11i of the under cover 101 is located below the through hole 12g. Although not shown, a plurality of bolt holes are provided through the base plate 102 for fixing a first case 106, an electric compressor 301, an accumulator 304, a second case 107, and a third case 108, which will be described later.

[0026] The top plate 103 is made of metal. As shown in Fig. 2, the top plate 103 is also a rectangular flat plate. The top plate 103 does not have the bolt holes 12a to 12f formed therethrough, unlike the base plate 102. Although not shown, the top plate 103 has a plurality of bolt holes formed therethrough for fixing a first case 106 and a second case 107, which will be described later.

[0027] The top cover 104 is made of metal. The top cover 104 has a rectangular top plate 104a, an inclined plate 104c inclined downward from one end of the top plate 104a, and peripheral walls 104b extending downward from three sides of the top plate 104a and three sides of the inclined plate 104c and connected to each other. The top plate 104a is larger than the bottom plate 101a of the undercover 101 by the thickness of the top cover 104. The top cover 104 can be fixed to the undercover 101 by bolts (not shown).

[0028] Two intake ports 13a, 13b located on one long side of the top plate 104a and a heat exhaust port 13c located on one short side of the top plate 104a and adjacent to the intake port 13a are formed in the peripheral wall 104b of the top cover 104. A first filter 110 and a second filter 111 are attached to the intake ports 13a, 13b. The heat exhaust port 13c is located on the opposite side of the top plate 104a to the inclined plate 104c.

[0029] The first filter 110 is composed of a first frame 110a fixed to the peripheral wall 104b of the top cover 104, and a metal mesh 110b. The first frame 110a has two openings formed therethrough that are aligned with the intake ports 13a, 13b. The metal mesh 110b is fixed to the first frame 110a so as to cover both openings.

[0030] The second filter 111 is made up of a second frame 111a fixed to the peripheral wall 104b of the top cover 104, and a sponge 111b. The second frame 111a also has two openings formed therethrough that are aligned with the intake ports 13a, 13b. The sponge 111b is detachably provided on the second frame 111a so as to cover both openings. The first and second filters 110, 111 are also part of the housing 100.

[0031] The air conditioning unit 300 includes an electric compressor 301, a condenser 302, an expansion valve 303, an accumulator 304, an evaporator 305, and a control device 306. The expansion valve 303 corresponds to a pressure reducing device. As shown in FIG. 3, the electric compressor 301, the condenser 302, the expansion valve 303, the evaporator 305, and the accumulator 304 are connected in this order by piping 307, and constitute a refrigeration cycle that circulates a refrigerant. The condenser 302 and the evaporator 305 are rectangular parallelepipeds of the same shape. A first fan 308 is provided on the electric compressor 301 side of the condenser 302, and a second fan 309 is provided on the accumulator 304 side of the evaporator 305. A second fan is provided on the electric compressor 301 side of the evaporator 305. The first fan 308 and the second fan 309 are also part of the air conditioning unit 300. The through hole 12 g of the base plate 102 is located in front of the second fan 309 .

[0032] The control device 306 is provided with a harness 306a and connection cords 306b, 306c, and 306d. The harness 306a is adapted to be connected to the battery 3b of the forklift 3 via the rear side of the undercover 101. The control device 306 is adapted to be fixed onto the base plate 102.

[0033] The connection cord 306b is connected to the electric compressor 301, which is operated by the control device 306 to circulate the refrigerant in the air conditioning unit 300. The connection cord 306c is connected to the first fan 308, and the connection cord 306d is connected to the second fan 309. The outside air is sucked into the top cover 104 from the intake ports 13a and 13b via the first and second filters 110 and 111 by the first fan 308 and the second fan 309, which are operated by the control device 306. The first fan 308 supplies the outside air in the top cover 104 to the condenser 302. The second fan 309 supplies the outside air in the top cover 104 to the evaporator 305.

[0034] As shown in FIG. 2, the condenser 302 is fixed to the first case 106. The first fan 308 is housed in the first case 106. The evaporator 305 is fixed to the second case 107. The second fan 309 is housed in the second case 107. The first case 106 and the second case 107 form a fan shroud. The evaporator 305 is housed in the third case 108. The first to third cases 106 to 108 are rectangular parallelepiped shaped. The first case 106 and the second case 107 are smaller than the third case 108 and have the same shape. The first to third cases 106 to 108 also correspond to a part of the housing 100. The first case 106 is made of metal. The second case 107 is made of metal. The third case 108 is made of resin. The first case 106 and the second case 107 are made of, for example, stainless steel.

[0035] As shown in Fig. 3 and Fig. 4, the first case 106 housing the first fan 308, the electric compressor 301, the accumulator 304, the second case 107 housing the second fan 309, and the control device 306 are fixed to the upper surface of the base plate 102 by bolts or the like (not shown). Thereafter, the electric compressor 301, the condenser 302, the expansion valve 303, the accumulator 304, and the evaporator 305 are connected by piping 307, and a refrigerant is sealed therein. In addition, the top plate 103 is fixed to the first case 106 and the second case 107 by bolts or the like (not shown). In this way, as shown in Fig. 5 and Fig. 6, a structure 200 is obtained in which the base plate 102, the top plate 103, and the air conditioning unit 300 are integrated.

[0036] 2, the cool air guide section 500 is composed of the inner surface of the top cover 104, particularly the inner surface of the inclined surface 104c, two air outlets 11g and 11h of the undercover 101, two shades 501, and two punker louvers 502. The shades 501 are fixed around the air outlets 11g and 11h of the undercover 101 together with the punker louvers 502 by bolts (not shown) so that they face the third case 108 housing the evaporator 305.

[0037] The shade 501 has a cylindrical portion 501a that is cylindrical and extends in the vertical axial direction, and an eaves portion 501b that is arc-shaped and integral with the cylindrical portion 501a on the upper side in the axial direction. The outer surface of the eaves portion 501b faces the evaporator 305, and the cool air blown from the evaporator 305 collides with the eaves portion 501b to redirect it into the cylindrical portion 501a.

[0038] The punker louvers 502 are provided on the axially lower side of the cylindrical portion 501a of each shade 501. Each punker louver 502 is capable of rotating its air outlet to blow cool air to the driver.

[0039] The unit cooler 1 is assembled and fixed to the forklift 3 by fastening means 700. The fastening means 700 has six fastening members 701a to 701f, two underrails 702 having a U-shaped cross section, a plurality of bolts 703, and a plurality of nuts 704.

[0040] As shown in FIG. 7, the fastening members 701a to 701f are made up of a first member 21, a second member 22, and an intermediate member 23. The first member 21 is made up of a disk-shaped disk portion 21a and a male screw portion 21b extending from the center of the disk portion 21a in an axial direction perpendicular to the disk portion 21a and integral with the disk portion 21a. The second member 22 is made up of a disk-shaped disk portion 22a and a boss portion 22c extending from the center of the disk portion 22a in the same direction as the male screw portion 21b and integral with the disk portion 22a, and having a female screw portion 22b formed therein. The intermediate member 23 is made of natural rubber having insulating and vibration-proof properties. The intermediate member 23 connects the disk portion 21a of the first member 21 to the disk portion 22a and the boss portion 22c of the second member 22. The intermediate member 23 corresponds to an insulating member.

[0041] As shown in Fig. 2, the under-rail 702 is composed of an upper plate 31, a lower plate 33, and a side plate 32 connecting the upper plate 31 and the lower plate 33. Three bolt holes 31a are formed through the upper plate 31, which correspond to the bolt holes 11a to 11f of the bottom plate 101a of the under-cover 101. As shown in Fig. 5, the upper plate 31 is inclined in the same manner as the bottom plate 101a of the under-cover 101. In addition, the under-cover 101 is lifted up from the head guard 3a of the forklift 3 by the pair of under-rails 702, so that the drain groove 11i of the under-cover 101 does not interfere with the head guard 3a.

[0042] As shown in Fig. 8, an appropriate number of bolt holes 41a are formed vertically through the head guard 3a of the forklift 3. Bolt holes 33a that align with the bolt holes 41a of the head guard 3a are formed through the lower plate 33 of the underrail 702. As shown in Fig. 5, the harness 306a is led to the rear of the forklift 3 along the underrail 702 on the side of the control device 306 on the rear side of the undercover 101. In this case, the harness 306a is held against the side plate 32 by, for example, a holding member (not shown).

[0043] When fixing the unit cooler 1 to the forklift 3, first, the structure 200 is prepared as shown in Fig. 5 and Fig. 6. Also, the shade 501 and the punker louvers 502 are fixed to the under-cover 101. Then, as shown in Fig. 8, two under-rails 702 are fixed to the head guard 3a of the forklift 3 using bolts 703 and nuts 704, and the under-cover 101 is placed on both under-rails 702.

[0044] In this state, the bolt 703 is inserted through the bolt holes 31a, 11a to 11f, and the bolt 703 is screwed into the female screw portion 22b of the fastening members 701a to 701f. Here, the fastening members 701a to 701f are composed of first fastening members 701a, 701d, second fastening members 701c, 701f, and third fastening members 701b, 701e. The first fastening members 701a, 701d are provided in the bolt holes 11a, 12a, 11d, and 12d of the undercover 101 and the base plate 102, with the first fan 308 sandwiched therebetween. The second fastening members 701c, 701f are provided in the bolt holes 11c, 12c, 11f, and 12f of the undercover 101 and the base plate 102, with the second fan 309 sandwiched therebetween. The third fastening members 701b and 701fe are provided in the bolt holes 11b, 12b, 11e and 12e of the undercover 101 and the base plate 102, with the electric compressor 301 sandwiched therebetween.

[0045] The through hole 12g opens at a position overlapping with an intersection of a diagonal line connecting the second fastening members 701c, 701f and the third fastening members 701b, 701fe. The accumulator 304 is disposed in a region between the second fastening members 701c, 701f and the third fastening members 701b, 701fe.

[0046] Once the fastening members 701a-701f have fixed the undercover 101 to the underrail 702, the male threaded portions 21b of the fastening members 701a-701f are inserted into the bolt holes 12a-12f of the base plate 102, and the nuts 704 are screwed into the male threaded portions 21b. In this way, even if the undercover 101 is relatively thin, the undercover 101 is firmly fixed to the head guard 3a.

[0047] 3, connection cords 306b, 306c, and 306d of the control device 306 are connected to the electric compressor 301, the first fan 308, and the second fan 309. Thereafter, the sponge rubber 112 shown in FIG. 2 is placed on the structure 200, the top cover 104 is placed on the undercover 101, and the top cover 104 is fixed on the undercover 101 with bolts (not shown). The unit cooler 1 of the embodiment is mounted on the head guard 3a of the forklift 3 in the above manner. Note that the underrail 702 may be fixed to the head guard 3a of the forklift 3 after all of the components shown in FIG. 2 are assembled and the underrail 702 is fixed to the undercover 101.

[0048] In this unit cooler 1, the electric compressor 301, the first fan 308, and the second fan 309 of the air conditioning unit 300 are operated by the battery 3b in the forklift 3, which does not have a means for reducing vibration as in a passenger car. Therefore, hot air is exhausted from the condenser 302, and the hot air is discharged to the outside from the heat exhaust port 13c. In addition, cold air is exhausted from the evaporator 305, and the cold air is blown to the driver M from the punker louver 502 through the shade 501. At this time, the inner surface of the top cover 104, especially the inner surface of the inclined surface 104c, appropriately straightens the cold air toward the punker louver 502. The driver M can freely change the blowing direction of the cold air, such as toward the driver M's neck, by changing the direction of the blowing port of the punker louver 502.

[0049] Furthermore, in this unit cooler 1, through holes 12g are formed in the base plate 102 to which the air conditioning unit 300 is fixed on the upper surface, and drain grooves 11i are formed in the undercover 101 provided below the base plate 102. Therefore, if condensation occurs in the air conditioning unit 300, the condensation falls from the base plate 102 through the through holes 12g onto the undercover 101 and flows into the drain grooves 11i of the undercover 101.

[0050] In particular, since through hole 12g is equally spaced apart from second and third fastening members 701c, 701f, 701b, and 701e that are present around through hole 12g, even if a large amount of condensed water is produced in air conditioning unit 300, the condensed water is unlikely to reach the second and third fastening members 701c, 701f, 701b, and 701e, and is likely to drop from through hole 12g into drain groove 11i of undercover 101. For this reason, the condensed water does not flow through the first to third fastening members 701a to 701f.

[0051] Further, the undercover 101 has an inclined surface 11p. The inclined surface 11p is inclined so as to move away from the base plate as it approaches the drain groove 11i. The inclined surface 11p is inclined from the bolt holes 11a, 11b, 11c, 11d, 11e, and 11f toward the drain groove 11i so as to move away from the base plate 102. Condensed water that has fallen from the through hole 12g flows down the inclined surface 11p by its own weight and collects in the drain groove 11i. The condensed water that has collected in the drain groove 11i is drained to the outside by the pipes 11m and 11q and the drain hoses 11n and 11r.

[0052] Therefore, according to this unit cooler 1, it is possible to blow cool air to the operator M of the forklift 3, and even if condensation occurs in the air conditioning section 300, there is no risk of current flowing to the forklift 3 side.

[0053] Furthermore, in this unit cooler 1, the fastening members 701a-701f include intermediate members 23, which have vibration-proofing properties, and therefore can suppress the transmission of vibrations caused by the forklift 3 during travel or operation to the air conditioning unit 300 on the base plate 102, reducing breakdowns in the air conditioning unit 300 and absorbing vibrations of the air conditioning unit 300, contributing to quietness. The sponge rubber 112 provided between the top plate 103 and the top cover 104 also contributes to quietness.

[0054] Furthermore, in this unit cooler 1, the first member 21 of the fastening members 701a-701f is fixed to the base plate 102 that fixes the air conditioning unit 300 to the upper surface, the second member 22 of the fastening members 701a-701f is fixed to the under-rail 702 with the undercover 101 sandwiched therebetween, the under-rail 702 is fixed to the head guard 3a of the forklift 3, and the intermediate member 23 connects the first member 21 and the second member 22, and the intermediate member 23 has insulating properties. Therefore, even if a leakage current occurs from the air conditioning unit 300, the current can only flow to the base plate 102 and the first member 21, and does not flow to the intermediate member 23, the second member 22, or the forklift 3.

[0055] Furthermore, in this unit cooler 1, the accumulator 304 is disposed in the area between the second fastening members 701c, 701f and the third fastening members 701b, 701e, so that wasted space is unlikely to be generated within the housing 100, and the unit cooler 1 is made compact.

[0056] 1, in the forklift 3, the suction ports 13a, 13b of the unit cooler 1 are located above the head guard 3a, so that noise from the unit cooler 1 is unlikely to disturb the driver M. In addition, the suction ports 13a, 13b of the unit cooler 1 are located at the left end of the head guard 3a, so that the first and second filters 110, 111 can be easily maintained or inspected.

[0057] Furthermore, in this forklift 3, the unit cooler 1 has a rectangular parallelepiped shape that is long from front to rear, is low in height, and the heat exhaust port 13c is located at the front end of the head guard 3a, so that the driver M is not exposed to hot air.

[0058] Incidentally, by removing the bolts 703 and nuts 704 and carrying out the above-mentioned operations in reverse, this unit cooler 1 can be mounted on another industrial vehicle.

[0059] (Variation 1) The unit cooler of the first modification employs an undercover 101A shown in FIG. 9. In the undercover 101A, the top surface of the bottom plate 101aA is flat, and a drain groove 11iA is formed in the left area from the center of the bottom plate 101aA. The top surface inside the drain groove 11iA is an inclined surface 11jA that slopes downward as it moves away from the portion close to the air outlets 11g and 11h. The most downstream portion of the drain groove 11iA is a water storage section 11kA, and a pipe 11mA penetrating the peripheral wall 101b is provided in the water storage section 11kA. A drain hose 11nA that does not get in the way and leads to the outside is connected to the pipe 11mA. The other configurations are the same as those of the first embodiment.

[0060] In this unit cooler, the drain groove 11iA has an inclined surface 11jA, and the condensation water that falls from the through hole 12g flows down the inclined surface 11jA by its own weight over the upper surface of the bottom plate 101aA and collects in the water storage section 11kA. The condensation water that has collected in the water storage section 11kA is drained to the outside through the pipe 11mA and the drain hose 11nA.

[0061] (Variation 2) The unit cooler of the second modification employs an undercover 101B shown in FIG. 10. In the undercover 101B, the upper surface of the bottom plate 101aB is flat, and a drainage groove 11iB is formed on the bottom plate 101aB, extending to both ends. The upper surface of the drainage groove 11iB is formed as in-path inclined surfaces 11jB, 11jC that descend from the middle position 11sB of the long side as they move away from each other. The two most downstream portions of the drainage groove 11iB are water storage sections 11kB, 11kC, and the water storage sections 11kB, 11kC are provided with pipes 11mB, 11qC that penetrate the peripheral wall 101b. The pipes 11mB, 11qC are connected to drain hoses (not shown) that are connected to the outside without getting in the way. The other configurations are the same as those of the first embodiment.

[0062] In this unit cooler, the drain 11iB has inclined surfaces 11jB and 11jC, and the condensation water that falls from the through hole 12g flows over the upper surface of the bottom plate 101aB and the inclined surfaces 11jB and 11jC by its own weight, and collects in the water storage sections 11kB and 11kC. The condensation water that has collected in the water storage sections 11kB and 11kC is drained to the outside through the pipes 11mB and 11qC and the drain hose.

[0063] The present invention has been described above with reference to the embodiment and modified examples 1 and 2. However, the present invention is not limited to the above embodiment and modified examples 1 and 2, and it goes without saying that the present invention can be modified and applied as appropriate without departing from the spirit of the present invention.

[0064] For example, the unit cooler of the present invention may be used in counter type, picking type, 3-way type, and refrigerated / freezer type electric forklifts, and can be used widely in industrial vehicles such as various engine forklifts, transport equipment, and towing vehicles.

[0065] For example, in a counter type electric forklift, as shown in Figs. 11 and 12, a notch 3d for hanging a battery may be formed in the head guard 3c. In order to prevent the unit cooler 1 from overlapping the notch 3d, the long sides of the condenser 302 and the evaporator 305, which are relatively large in the refrigeration cycle, are arranged at both ends so that they become the short sides of the unit cooler 1, and other elements constituting the refrigeration cycle, such as the electric compressor 301, the expansion valve 303, and the accumulator 306, are accommodated between the condenser 302 and the evaporator 305 and unitized. In this case, since the unit cooler 1 of the embodiment has a rectangular parallelepiped shape that is long in the front-rear direction, it is mounted to the left of the notch 3d, and it is possible to mount it while avoiding the notch 3d. Also, even if a cover 4 made of transparent resin is provided on the head guard 3c, the unit cooler 1 is made small so as not to cover the entire cover 4, so that it does not obstruct the driver M's obliquely upward visibility.

[0066] The unit cooler 1 is not limited to being mounted so as to extend in front of and behind the head guard 3c. For example, as shown in Fig. 13, the unit cooler 1 may be mounted so as to extend left and right behind the notch 3d, or as shown in Fig. 14, the unit cooler 1 may be mounted so as to extend left and right in front of the notch 3d. In these cases, it can be arbitrarily determined whether the exhaust port 13c and the inclined plate 104c are to be on the left or right.

[0067] The vibration-proof members of the unit cooler of the present invention are not limited to the above-mentioned fastening members 701a to 701f, but may be members in which a male thread portion is formed in the first member and the second member, or members in which a female thread portion is formed in the first member and the second member. [Industrial Applicability]

[0068] The present invention can be used for a unit air conditioner that can be installed as an option in an industrial vehicle. [Explanation of symbols]

[0069] 100…Housing 300…Air conditioning section 12g...Through hole 102…Base plate 701a to 701f... fastening members (701a, 701d... first fastening members, 701b, 701e... second fastening members, 701c, 701f... third fastening members) 101, 101A, 101B...Undercover 11i, 11iA, 11iB...Drainage channel (drainage ditch) 11p…Slanted surface 11jA, 11jB, 11jC...Road slope 23...Insulating member (intermediate member) 301...Electric compressor 302…Condenser 303, 304... Pressure reducing device (expansion valve) 305…Evaporator 308…First fan 309…Second fan 306...Control device 304…Accumulator

Claims

1. Housing and an air conditioning unit that is accommodated in the housing, forms a refrigeration cycle, and cools air and supplies the cooled air to the outside of the housing; The housing includes: a base plate to which the air conditioning unit is fixed and having a through hole through which condensation water generated in the air conditioning unit is discharged; an undercover provided below the base plate and fastened to an outer periphery of the base plate by a plurality of fastening members via an insulating member; The undercover is provided below the through hole and has a drainage channel recessed therein for guiding the condensation water to the outside of the housing, The drainage channel is provided at a predetermined interval from the plurality of fastening members, the air conditioning unit includes an electric compressor, a condenser, a pressure reducing device, an evaporator, a first fan that blows air to the condenser, a second fan that blows air to the evaporator, and a control device that controls the electric compressor, the first fan, and the second fan; The first fan is provided at one end of the base plate and adjacent to the condenser, The second fan is provided adjacent to the evaporator at the other end of the base plate, The electric compressor is provided between the first fan and the second fan, The fastening member is a pair of first fastening members disposed with the first fan therebetween; a pair of second fastening members disposed with the second fan therebetween; a pair of third fastening members disposed with the electric compressor therebetween, The unit cooler is characterized in that the through hole opens at a position overlapping an intersection of a diagonal line connecting the second fastening member and the third fastening member.

2. 2. The unit cooler according to claim 1, wherein the undercover has an inclined surface that is inclined so that the condensed water is guided from the fastening member side toward the drainage channel.

3. The unit cooler according to claim 2 , wherein the drainage channel extends to at least one end of the undercover.

4. 2. The unit cooler according to claim 1, wherein the drainage channel has an inclined surface therein that guides the condensation water that has fallen from the through hole to the end portion.

5. 3. The unit cooler according to claim 1, wherein the insulating member is made of a rubber material having vibration-proofing properties.

6. The air conditioning unit has an accumulator, 3. The unit cooler according to claim 1, wherein the accumulator is disposed in a region between the second fastening member and the third fastening member.

7. A unit cooler as described in claim 1 or 2, wherein the through hole is equally spaced from the second fastening member and the third fastening member and is positioned in a position overlapping the drainage channel from above.

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