KR20070037294A - Heat exchanger and air conditioning device - Google Patents

Abstract

An object of the present invention is to provide an air conditioner capable of suppressing the occurrence of rust in the U-shape of the refrigerant pipe outside the tube plate on the side opposite to the refrigerant pipe blowout side of the indoor heat exchanger due to the capillary phenomenon of water stored in the drain pan. .

An inner heat exchanger (19), a blower (17), and a drain pan (18) having a drain reservoir in which the lower end of the heat exchanger (19) is submerged in an outer box (11) made of sheet metal, 19 is a pair of sheet metal tube plates 19a and 19b, a plurality of heat dissipation fins 19c positioned between the pair of tube plates 19a and 19b, and the pair of tube plates 19a and 19b. And an indoor heat exchanger (19) in which a refrigerant pipe (19d) including a refrigerant pipe (19d) which is zigzag passed through the holes drilled in the plurality of heat radiation fins (19c) is bent in a U shape on the opposite side to the refrigerant pipe outlet side. A gap securing protrusion 196 is provided on the side wall 18 so as to space the heat radiating fins 19c from the tube plate on the surfaces of the heat sinks 19a and 19b of the indoor heat exchanger 19. Installed.

Outer box, tube plate, drain pan, heat sink, indoor heat exchanger

Description

Heat exchanger and air conditioning unit {HEAT EXCHANGER AND AIR CONDITIONING DEVICE}

1 is a longitudinal side view of an air conditioner of the present invention;

Figure 2 is a view of the air conditioner of Figure 1 with the cosmetic panel and drain pan removed.

3 is a schematic front view of an indoor heat exchanger of an air conditioner;

<Explanation of symbols for the main parts of the drawings>

10: air conditioner

11: outer box

17: blower

18: drain pan

18a: drain reservoir

19: indoor heat exchanger

19a, 19b: tube sheet

19c: heat sink fins

19d: refrigerant pipe

196: clearance for securing the gap

[Document 1] Japanese Unexamined Patent Publication No. 9-243291

TECHNICAL FIELD The present invention relates to a heat exchanger and an air conditioner, and more particularly to an rust preventive means of a U-shaped portion of a refrigerant pipe of a heat exchanger.

Conventionally, there is an air conditioner including a heat exchanger, a blower, and a drain pan having a drain storage portion in which the lower end of the heat exchanger is submerged. The heat exchanger includes a pair of sheet metal tube plates, a plurality of heat dissipation fins positioned between the pair of tube sheets, and a refrigerant tube zigzag-passed through the holes drilled through the pair of tube plates and the plurality of heat dissipation fins. (See patent document 1).

Since the heat exchanger has a narrow gap between the tube plate and the heat radiating fin adjacent to the tube plate, the drain stored in the drain pan rises due to the capillary phenomenon and enters the gap between the holes of the tube plate passing through the refrigerant pipe. The capillary water penetrating into the gap between the tube plate holes is evaporated by the air flowing through the heat radiating fins from the primary air side to the secondary air side. Therefore, the gap between the tube plate holes passing through the refrigerant tube is repeatedly wetted or dried to expose the environment of the voltaic battery between the tube plate and the refrigerant tube and exposed to an environment where rust is likely to occur.

In the heat exchanger, a U-shaped tube bent into a U-shaped copper pipe before assembling is passed through a hole drilled through a pair of tube plates and a plurality of heat dissipation fins from the opposite side to the refrigerant pipe outlet side, and the straight pipes are bent from the refrigerant pipe outlet side. Tube), and the U-turn portion of the coolant tube U-turned on the outer side of the tube plate is bent by cold working, which is an environmental condition that is more prone to rust.

DISCLOSURE OF THE INVENTION In view of the above, the object of the present invention is to provide a heat exchanger and an air conditioner capable of suppressing the occurrence of rust in the U-shape of the refrigerant pipe outside the tube plate by the capillary phenomenon of the drain water stored in the drain pan. It aims to do it.

In order to solve the above problems, the heat exchanger of the present invention is zigzag in a hole drilled through a pair of sheet metal tube plates, a plurality of heat dissipation fins located between the pair of tube plates, and a pair of tube plates and the plurality of heat dissipation fins. The heat exchanger provided with the refrigerant pipe which passed through the said board | substrate WHEREIN: It is characterized by the installation of the clearance gap | interval protrusion which makes this heat radiating fin spaced apart from this pipe plate by the required dimension on the surface of the said heat radiating fin side.

An air conditioner according to the present invention includes a heat exchanger, a blower, and a drain pan having a drain reservoir portion in which a lower end of the heat exchanger is submerged, wherein the heat exchanger is positioned between a pair of sheet metal tube plates and a pair of tube plates. In the air conditioner comprising a plurality of heat dissipation fins, and a pair of tube plates and a refrigerant pipe passed in a zigzag manner through the holes drilled in the plurality of heat dissipation fins, the heat dissipation fins on the surface of the heat dissipation fin side of the tube plate. It is characterized in that a gap for securing the gap to be spaced apart from the required dimensions.

According to the heat exchanger and the air conditioner of the above feature, the gap between the tube plate of the heat exchanger and the heat radiating fin adjacent to the tube plate is secured larger than the normal gap by installing the gap adjusting protrusion, so that the drain water stored in the drain pan Since the gap between the tube plate and the heat sink fin is not raised by the capillary phenomenon, the gap between the holes of the tube plate passing through the refrigerant tube that is not immersed in the drain in the drain pan is not wet or dried, so it is relatively difficult to cause rust. This can suppress the occurrence of rust.

In the air conditioner of the above aspect, it is preferable that the clearance securing protrusion is provided surrounding the refrigerant pipe. Moreover, it is preferable that it is formed by applying a burring process to the hole of a tube plate.

EMBODIMENT OF THE INVENTION Below, one Embodiment of this invention is described with reference to drawings.

1 is a longitudinal side view of an air conditioner of the present invention.

Fig. 2 is a view of the air conditioner suspended from the ceiling space from the bottom with the makeup panel and drain pan removed.

The air conditioner 10 according to the present embodiment includes an indoor heat exchanger 19, a blower 17, and a drain storage part in which the lower end of the heat exchanger 19 is submerged in the outer box 11 made of sheet metal ( A plurality of drain pans 18a having a drain pan 18a, the heat exchanger 19 being positioned between a pair of sheet metal tube plates 19a, 19b and the pair of tube plates 19a, 19b. The refrigerant pipe comprising a heat dissipation fin 19c, a pair of tube plates 19a and 19b, and a refrigerant tube 19d passed in a zigzag manner through the holes drilled in the plurality of heat dissipation fins 19c, An indoor heat exchanger 19, which is bent in a U-shape on the opposite side, is mounted on the drain pan 18.

The air conditioner 10 has a gap securing protrusion for separating the heat dissipation fins 19c from the respective tube plates 19a and 19b on the surface of the heat dissipation fin side of the tube plates 19a and 19b of the indoor heat exchanger 19. 196) is provided (see Fig. 3).

Below, it demonstrates in detail. As shown in Figs. 1 and 2, the air conditioner 10 is a box-shaped sheet metal having an open lower end and has an outer box 11 suspended from a ceiling slab 50. (11) The compartment is partitioned into a machine chamber (16) housing the blower fan (17) by a partition plate (42) and a heat exchanger chamber (15) containing an indoor heat exchanger (19), and foamed in the heat exchanger chamber (15). The internal heat insulating material 21 made of resin (made of foamed styrol) is disposed, and the drain pan 18 made of foamed resin made of foamed resin (made of foamed styrol) in contact with the lower end of the internal heat insulating material 21 is provided. The indoor heat exchanger (19) is placed on the drain pan (18) so that the upper surface is brought into close contact with the internal heat insulating material (21), and has a suction port (12) and a blowout port (13) in the lower opening of the outer box (11). The cosmetic panel 14 fixed and covered is provided. In Fig. 1, reference numeral 27 denotes an electric expansion valve.

By operating the blower fan 17, this air conditioner 10 sucks indoor air from the inlet 12 of the makeup panel 14, and transfers this indoor air to the primary air side 15a of the heat exchanger chamber 15. It is a so-called one-way blow-out type air conditioner which feeds into (), flows through the clearance gap between the heat radiating fins of the indoor heat exchanger 19, and heats it, and blows off the heat-exchanged air from the blower outlet 13.

The outer box 11 is a box shape having a front face wall on the outlet 13 side, a rear face wall on the suction inlet 12 side, side walls on the left and right, and an upper face wall, the lower end of which is open, and the left and right sides. The suspension member 30 is provided in the wall, and it hangs in the state accommodated in the ceiling space by fastening and attaching a nut to the suspension member 30 through the lower end of the suspension bolt 31 vertically lowered from the ceiling slab 50. . The box-shaped foamed resin inner heat insulating material 21 is provided in close contact with the inner surface of the heat exchanger chamber 15 of the sheet metal outer box 11.

As shown in Fig. 1, the makeup panel 14 is secured with screws by covering the lower end opening of the outer box 11. When the makeup panel 14 is removed, the inside of the machine room 16 of the outer box 11 is exposed, and the drain pan 18 is exposed as shown in FIG. The decorative panel 14 includes a grill 51 having a plurality of lattice-shaped openings in a suction port 12 so as to be removable, and a filter material 33 is provided on the grill 51 in a replaceable manner. Moreover, the blowing direction change plate 34 made of synthetic resin is provided in the blowout opening 13 of the cosmetic panel 14 so that the inside of the cross section of the blowout opening 13 can be oscillated. The inclination can be adjusted by the motor 35, and it is comprised so that a wind direction can be changed. The driving and rotation directions of the micro motor 35 can be controlled by sending a radio wave to the electric box 28 by a remote controller and also by operating a button of a control device (not shown) installed on the interior wall. It is composed.

As shown in FIG. 1, the partition plate 42 partitioning the inside of the outer box 11 between the indoor heat exchanger 19 and the blower fan 17 has an opening, and the blower opening of the blower fan 17 is provided in this opening. 17a is plugged in and connected. The blowing fan 17 preferably uses a sirocco fan and is rotated by the motor 36. As shown in Fig. 2, the motor 36 has a shaft extending on both sides thereof so that a bearing 52 is covered and the bearing 52 is a motor provided with an upper surface of the outer box 11 and a partition plate 42. It is supported by the bracket 37.

The drive of the motor 36 can be controlled by sending a radio wave to the electric box 28 by a remote controller and controlling the same by operating a button of a control device (not shown) installed on the interior wall. .

The indoor heat exchanger 19 is almost in close contact with the upper surface of the inner heat insulating material 21, and the lower surface is mounted on the drain pan 18 made of foamed resin so that the primary air side 15a and the secondary air side 15b are disposed. It is configured to partition. The indoor heat exchanger 19 is dew condensed to a portion that generates heat radiation fins and other temperature differences during the cooling operation. This dew condensation can be received by the drain pan 18 made of a waterproof resin coated foam. As shown in FIG. 2, the liquid surface sensor 39 and the drain pump 40 are provided in the bracket 38 provided in the partition plate 42 as a drain drain means. The liquid surface sensor 39 and the drain pump 40 correspond to the lowest positions of the drain reservoir of the drain pan 18. The drain pump 40 operates when the drain is stored, and drains the drain water from the drain port 41. The liquid surface sensor 39 does not turn on or off the drain pump 40 but instead detects when the drain pump 40 is faulty or the like and the drain water is stored in the drain pan 18 to the full allowable level. It is an emergency means for outputting, sending a signal to the electric box 28, stopping the operation of the air conditioner 10, and giving a warning.

In particular, the indoor heat exchanger 19 of the present embodiment includes a sheet metal (iron) tube plate 19a on the refrigerant pipe takeout side and a sheet metal (iron) on the opposite side to the refrigerant pipe takeout side, as shown in FIG. A tube plate 19b, a plurality of aluminum heat dissipation fins 19c sandwiched between the tube plates 19a and 19b, and a zigzag coolant tube 19d. The coolant tube 19d passes a U-shaped tube 191 bent into a U-shaped copper tube prior to assembly attachment from the opposite side to the coolant tube blowout side through a hole drilled through the tube plate 19b, the tube plate 19a, and the plurality of heat dissipation fins 19c. In this configuration, the socket 192 is covered and soldered to an end portion of the U-shaped pipe 191 on the refrigerant pipe extraction side, and the bend pipe (copper pipe) 193 is inserted into the socket 192 and soldered. The coolant pipe 19d includes coolant pipe take-outs 194 and 195 (see Figs. 2 and 3).

As shown in Fig. 3, the tube plate 19a and the tube plate 19b on both sides are provided with a gap securing protrusion 196 on the surface of the heat dissipation fin side that separates the heat dissipation fin 19c from the tube plates 19a and 19b by the required dimensions. Doing. The gap securing protrusion 196 is provided surrounding a hole passing through the coolant pipe 19d. In this embodiment, this clearance ensuring protrusion 196 drills the hole which passes through the refrigerant pipe 19d from the outer surface side with respect to the tube board 19b by a burring process, and the surface of the heat sink fin side of this tube plate 19b. It is a burring (circular protrusion) that protrudes.

According to the present embodiment, the pipe plate 19b of the indoor heat exchanger 19 and the heat radiation fins 19c adjacent to the tube plate 19b are provided by providing the gap adjusting projection 196 on the surface of the heat sink fin side of the tube plate 19b. Since the gap between the tube plate 19b and the heat radiating fin 19c adjacent to the tube plate 19b is larger than the normal gap, the drain water stored in the drain pan 18 is reduced to the tube plate 19a and the heat radiating fin ( Since the gap between 19c and the tube plate 19b and the heat sink fin 19c does not rise due to the capillary phenomenon, the tube plate passes through the refrigerant pipe 19d that is not immersed in the drain in the drain pan 18. Since the gap of the hole of 19b does not repeat wet or dry, it becomes an environment in which rust is comparatively hard to occur, and generation | occurrence | production of rust can be suppressed. It is sufficient that the gap in which the heat radiating fin is spaced apart from the tube plate by a required dimension is, for example, 1 mm to 2 mm larger than the normal gap.

According to this embodiment, since the clearance adjustment protrusion 196 was comprised as the bearing (circular protrusion) which protrudes on the surface of the heat sink fin side of the pipe plate 19b, it is uniform between the pipe plate 19b and the heat sink fin 19c. It is easy to secure one gap, and furthermore, the number of processing steps does not increase, so that the cost does not increase.

As mentioned above, although embodiment of the air conditioner of this invention was described in detail with reference to drawings, this invention is not limited to the above-mentioned embodiment, It can variously design change within the range which does not deviate from the summary.

In the above embodiment, the hole for passing the coolant pipe 19d through the pipe plates 19a and 19 is subjected to a burring process to form the gap adjusting protrusion 196. However, the hole is passed away from the hole for passing the coolant pipe 19d through the pipe plate 19b. The gap adjustment protrusion may be provided at the position.

In the above embodiment, the U-shaped tube bent into a U-shaped copper pipe before assembly is passed through a hole drilled through the pair of tube plates and the plurality of heat dissipation fins from the opposite side to the refrigerant pipe outlet side, and the straight pipes are bent from the refrigerant tube outlet side. Although a heat exchanger and an air conditioner of the type soldering with a copper tube) have been described, a straight tube (copper tube) is passed through a hole drilled through a pair of tube plates and a plurality of heat dissipation fins in the heat exchanger, and is directly connected to the outside of the tube plates on both sides. The same applies to indoor heat exchangers and air conditioners of the type which solder each other to bend tubes (copper tubes).

Furthermore, in the above embodiment, the present invention is applied to a one-way blow-out air conditioner, but the present invention is also applied to a two-way blow-out type and a four-way blow-out air conditioner, and a wall-mounted air conditioner or a built-in type air conditioner. The present invention also applies to air conditioners or ceiling suspension type air conditioners. The same applies to other heat exchangers.

According to the present invention, the gap between the tube plate of the heat exchanger and the heat sink fin adjacent to the tube plate is secured by the gap securing protrusion so that the drain water stored in the drain pan does not rise between the tube plate and the heat sink fin by the capillary phenomenon. Therefore, it is possible to suppress the occurrence of rust in the refrigerant pipe at the portion passing through the refrigerant pipe of the tube plate.

Claims (4)

A heat exchanger comprising a pair of sheet metal tube plates, a plurality of heat dissipation fins positioned between a pair of tube sheets, and a coolant tube zigzag passed through the pair of tube plates and the holes drilled in the plurality of heat dissipation fins, And a gap securing protrusion for disposing the heat dissipation fins from the tube plate by a required dimension on the surface of the heat dissipation fin side of the tube plate. A heat exchanger, a blower, and a drain pan having a drain storage portion in which the lower end of the heat exchanger is submerged, wherein the heat exchanger is provided with a pair of sheet metal tube plates and a plurality of heat dissipation fins positioned between the pair of tube plates; In an air conditioner comprising a pair of tube plates and a refrigerant pipe passed in a zigzag manner through the holes drilled in the plurality of heat radiation fins, An air conditioning apparatus, characterized in that a gap securing protrusion is provided on the surface of the heat sink fin side of the tube plate so as to space the required heat radiation fin from the tube plate. The air conditioner according to claim 2, wherein the gap securing protrusion is provided surrounding the refrigerant pipe. The air conditioner according to claim 2, wherein the gap securing protrusion is formed by applying a burring process to the hole of the tube plate.

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