JP2009145015A - Ceiling suspension type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling suspension type air conditioner without causing dripping of drain water along lead wires, improving assembly work efficiency by facilitating a wiring process of the lead wires for temperature sensors, and reducing costs by reducing the number of parts. <P>SOLUTION: The air conditioner includes in a casing 2 of an indoor unit 1, a heat exchanger 20 carrying out heat exchange with indoor air 50 sucked in from a suction opening 10, coolant pipings 25, 26 arranged in a side of the heat exchanger 20 with one ends connected to the heat exchanger 20, the temperature sensors 27a, 27b having the lead wires 28a, 28b connected to a control part and attached to the coolant pipings 25, 26, and a coil support 30 installed in a side of a lower part of the heat exchanger 20 to fix the heat exchanger 20 to the casing 2. The lead wires 28a, 28b of the temperature sensors 27a, 27b are locked to a cutout part 31 provided in the coil support 30. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a ceiling-suspended air conditioner, and more specifically, a ceiling-suspended air having a coil support for fixing a side portion of a heat exchanger for exchanging heat of indoor air to a housing of an indoor unit. It is about a harmony machine.

The ceiling-suspended air conditioner has an indoor unit, and a heat exchanger is provided in the housing of the indoor unit. One end of the heat exchanger is connected to the heat exchanger on the side of the refrigerant. There are refrigerant gas pipes and refrigerant liquid pipes that are refrigerant pipes through which the refrigerant flows, and a connection portion provided at the other end of the refrigerant pipes is fixed to the casing (for example, see Patent Document 1).
And in order to control the operation | movement of an air conditioner, the temperature sensor which detects the temperature of the refrigerant | coolant which distribute | circulates is attached to refrigerant | coolant piping.

  In such a ceiling-mounted air conditioner, for example, a side portion of the heat exchanger is attached to the casing of the indoor unit by a coil support, and the refrigerant pipe is a pipe fixing portion of the casing by a pipe band. It is fixed to. Further, the lead wire of the temperature sensor is fixed to the refrigerant pipe using a binding band so as not to hinder the subsequent process when the indoor unit is assembled.

Japanese Patent Laying-Open No. 2005-164111 (page 3, FIG. 1-2)

  According to the ceiling-suspended air conditioner of Patent Document 1, the refrigerant pipe is connected to the temperature sensor lead wire attached to the refrigerant pipe connected to the heat exchanger due to variation in position when the lead wire of the temperature sensor is fixed to the refrigerant pipe by the binding band. If there is contact with the exposed part of the water, the drain water adhering to the refrigerant pipe may travel along the lead wire and drip to the outside of the indoor unit. There was a problem that the nature was bad.

The present invention has been made to solve the above-described problems, and facilitates the wiring process of the lead wire of the temperature sensor to improve the assembly workability, and the drain water does not drip through the lead wire. The object is to provide a ceiling-suspended air conditioner.
It is another object of the present invention to provide a ceiling-suspended air conditioner that can reduce the cost by reducing the number of parts during assembly work.

  A ceiling-suspended air conditioner according to the present invention includes a heat exchanger that exchanges heat between indoor air sucked from a suction port in a housing of an indoor unit, and one end connected to the heat exchanger. A refrigerant pipe arranged on the side, a temperature sensor having a lead wire connected to the control unit and attached to the refrigerant pipe, and a heat exchanger installed on the side of the lower part of the heat exchanger A coil support that is fixed to the casing, and a lead wire of the temperature sensor is engaged with a notch provided in the coil support.

  In the ceiling-suspended air conditioner according to the present invention, the lead wire of the temperature sensor is locked to the notch formed in the coil support provided in the housing of the indoor unit, so that the wiring process is easy and reliable. Thus, the assembly workability can be improved. Moreover, drain water does not drip along the lead wire. Furthermore, since the number of parts at the time of assembly work can be reduced, cost can be reduced.

[Embodiment 1]
FIG. 1 is a configuration explanatory diagram in which a part of the indoor unit of a ceiling-suspended air conditioner according to Embodiment 1 of the present invention is omitted from the side, FIG. 2 is a configuration explanatory diagram of the main part of FIG. 1, and FIG. 2 is an exploded perspective view of the main part of FIG. 2, FIG. 4 is a perspective view of the main part in a state where FIG. 3 is assembled, and FIG. 5 is an enlarged perspective view of the main part of FIG.

  The casing 2 of the indoor unit 1 of the ceiling-suspended air conditioner is substantially rectangular in plan and has a box shape, and is suspended from the ceiling. A suction port 10 for sucking indoor air 50 (also referred to as primary air) is provided on the lower surface on the upstream side (right side in FIG. 1) of the housing 2, and dust or the like is adsorbed and removed to the suction port 10. A filter 11 is installed. A blower fan 12 made of a sirocco fan is disposed near the suction port 10 in the housing 2 and is driven by an electric motor (not shown).

  An air passage 13 and an air outlet 14 are provided on the downstream side (left side in FIG. 1) of the blower fan 12 in the housing 2, and a heat exchanger 20 constituting a refrigeration cycle is provided in the air passage 13. The air 51 (also referred to as secondary air), which is disposed obliquely with the downstream side facing upward and heat-exchanged between the indoor air 50 sucked from the suction port 10 and the refrigerant of the heat exchanger 20, is also referred to as the air outlet 14. Is blown into the room.

  Below the heat exchanger 20, a polystyrene foam drain pan 15 that receives drain water 52 generated in the heat exchanger 20 is disposed. On the surface of the drain pan 15 on the heat exchanger 20 side, an ABS skin is provided. Layer 16 is inserted. A drain water reservoir 17 and a drain water discharge port 18 are provided upstream of the side 20 a of the heat exchanger 20 of the drain pan 15, and the drain water 52 is discharged to the drain water discharge port 18. Hose (not shown) is connected, and drain water 52 is discharged out of the housing 2.

  In addition, one end of a refrigerant gas pipe 25 and a refrigerant liquid pipe 26, which are refrigerant pipes through which a refrigerant flows, is connected to the side 20a of the heat exchanger 20, and the refrigerant pipes 25 and 26 are connected to the refrigerant pipes 25 and 26. Temperature sensors 27a and 27b (FIG. 4) for detecting the temperature are attached. The temperature sensors 27a and 27b are connected to an air conditioner control board (not shown) constituting a control unit by lead wires 28a and 28b.

The coil support 30 is made of a metal plate, one edge is fixed to the side edge of the heat exchanger 20, the other edge is fixed to the housing 2, and the primary air that flows through the heat exchanger 20. The secondary air is partitioned with the drain pan 15 so as not to bypass the side portion of the heat exchanger 20.
The coil support 30 is formed by bending a substantially rectangular metal plate, and is composed of three surfaces 30a to 30c including a first surface 30a, a second surface 30b, and a third surface 30c from the upstream side. ing.

  The second surface 30b of the coil support 30 is formed by bending the downstream side of the first surface 30a obliquely upward (FIG. 4), and becomes substantially horizontal with the heat exchanger 20 installed, so that heat exchange is performed. The drain water 51 falling from the side portion 20a of the vessel 20 and the refrigerant gas pipe 25 and the refrigerant liquid pipe 26 is stored. The third surface 3c is formed by being bent obliquely upward in the same direction as the first surface 3a from the downstream end of the second surface 3b, and the lower surface of the heat exchanger 20 in the installed state of the heat exchanger 20 Is extended to the upper portion 20b.

  Further, on the upstream side of the first surface 30a, an insertion portion that opens at the tip portion and a bent portion that is continuously bent are inserted, and lead wires 28a and 28b of the temperature sensors 27a and 27b are inserted. A substantially L-shaped cutout 31 is provided to be locked. The width w of the notch 31 is formed narrower than the outer diameter of the protective tubes 29a and 29b covering the lead wires 28a and 28b (FIG. 5).

Next, an example of the assembly procedure of the side part of the heat exchanger 20 of the ceiling-suspended air conditioner configured as described above will be mainly described with reference to FIG. Note that FIG. 3 is upside down from the installed state of the indoor unit 1.
First, the housing top plate 3 is arranged, and the blower outlet upper panel 5 is attached to the downstream side thereof. Further, a partition plate 7 having a pipe fixing portion 6 integrated with the housing top plate 3 is installed between the blower fan 12 and the air passage 13.

  Next, in the groove portions 6 a and 6 b provided in the pipe fixing portion 6, the vicinity of the connection portion at the other end of the refrigerant gas pipe 25 and the refrigerant liquid pipe 26 having one end connected to the heat exchanger 20 is set, and then the pipe band 8. Install. Then, the refrigerant gas pipe 25 and the refrigerant liquid pipe 26 are sandwiched between the groove parts 6 a and 6 b of the pipe fixing part 6 and the arc parts 8 a and 8 b of the pipe band 8 and fixed with screws.

  Next, temperature sensors 27a and 27b for detecting the refrigerant temperature are attached to the refrigerant gas pipe 25 and the refrigerant liquid pipe 26 (FIG. 4). At this time, since the lead wires 28a and 28b of the temperature sensors 27a and 27b are locked and fixed to the notch 31 of the coil support 30 during wiring (FIG. 5), the lead wires 28a and 28b are conventionally used. Need not be bound to the refrigerant gas pipe 25 and the refrigerant liquid pipe 26 by a binding band.

  In this case, as described above, the width w of the notch 31 is formed to be narrower than the outer diameter of the protective tubes 29a and 29b covering the lead wires 28a and 28b, but the material of the protective tubes 29a and 29b is a soft material. (E.g., soft PVC), the protective tubes 29a and 29b can be compressed (elastically deformed) and the lead wires 28a and 28b can be pushed into the notch 31 to be locked, and the locked lead wire 28a can be locked. , 28b are fixed by friction generated by the restoring repulsive force of the protective tubes 29a, 29b, and do not come out of the notch 31.

Next, the coil support 30 in which the third surface 3c is positioned below the side portion 20a of the heat exchanger 20 and the side edge thereof is fixed to the heat exchanger 20 with screws is used for the casing side plate 4 and the outlet port upper panel. Fix to 5 with screws. Further, the lead wires 28a and 28b of the temperature sensors 27a and 27b are inserted into the cutout portion 31 and locked.
Subsequently, the drain pan 15 is attached below the heat exchanger 20. At this time, the lead wires 28a and 28b of the temperature sensors 27a and 27b are pulled out to the upstream side through the relief portions 15a (FIG. 4) of the lead wires 28a and 28b provided on the drain pan 15, and then the design panel 19 is formed on the lower surface of the drain pan 15. Incorporate

  Next, the operation of the ceiling-suspended air conditioner according to the present embodiment configured as described above will be described. When the blower fan 12 is driven by the electric motor, the indoor air 50 is sucked from the suction port 10 and reaches the heat exchanger 20 through the air passage 13. Here, heat is exchanged between the indoor air 50 and the refrigerant of the heat exchanger 20, and the heat-exchanged indoor air 50 becomes secondary air 51 and blows out into the room from the outlet 14.

  At this time, the drain water 52 falls to the coil support 30 from the side portion 20a of the heat exchanger 20 and the refrigerant gas pipe 25 and the refrigerant liquid pipe 26, and the drained water 52 flows along the shape of the coil support 30. , Accumulated on the second surface 30b. And it flows into the drain pan 15 from the 2nd surface 30b, and is stored in the drain water reservoir 17 of the drain pan 15, and is discharged | emitted from the drain water discharge port 18 out of the housing | casing 2 after that.

  According to the present embodiment, since the lead wires 28a and 28b of the temperature sensors 27a and 27b are locked to the notches 31 provided in the coil support 30 to be in a fixed state, the wiring process is easy and reliable. Thus, the assembly workability can be improved. Further, since the lead wires 28a and 28b of the temperature sensors 27a and 27b are not in contact with the refrigerant pipes 25 and 26, drain water does not drip along the lead wires 28a and 28b. Furthermore, since the number of parts at the time of assembly work can be reduced, cost can be reduced.

[Embodiment 2]
FIG. 6 is an explanatory view around the coil support of the ceiling-suspended air conditioner according to Embodiment 2 of the present invention.
In the present embodiment, the edge of the third surface 30c of the coil support 30 in the first embodiment is provided around the screw insertion hole 32 provided corresponding to the screw hole provided in the edge of the heat exchanger 30. A partition-like rib 33 is provided orthogonal to the third surface 30c. Other configurations and operations are the same as those in the first embodiment.

In the first embodiment, when the coil support 30 is fixed to the side portion 20a of the heat exchanger 20 with a screw, if the screw is mistakenly removed from the screw insertion hole 32 together with the driver, the heat exchanger 20 is damaged. Although there is a possibility, according to this Embodiment, even if a screw remove | deviates from the screw penetration hole 32, since it hits the rib 33 and does not reach the heat exchanger 20, damage to the heat exchanger 20 can be prevented.
The effect of the present embodiment is almost the same as that of the first embodiment.

[Embodiment 3]
In the first and second embodiments, the case where the coil support 30 is formed of a metal plate has been shown. However, in the present embodiment, the coil support 30 is formed of plastic. In this case, for example, PP resin was used as the plastic material.

  According to the present embodiment, since the coil support 30 is formed of a plastic material, the weight can be reduced as compared with the case where it is formed of a metal plate. Moreover, since it is inexpensive, the cost can be reduced, and it is not rusted. Moreover, according to the plastic material, a complicated shape can be manufactured.

It is composition explanatory drawing which abbreviate | omitted one part seen from the side surface of the indoor unit of the ceiling-suspended air conditioner which concerns on Embodiment 1 of this invention. FIG. 2 is a configuration explanatory diagram of a main part of FIG. 1. It is a disassembled perspective view of the principal part of FIG. FIG. 4 is a perspective explanatory view of a main part in a state where FIG. 3 is assembled. It is an expansion perspective view of the principal part of FIG. It is a perspective view of the principal part of the indoor unit of the suspension type air conditioner concerning Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Indoor unit, 2 housing | casing, 6 Piping fixing | fixed part, 10 Air inlet, 12 Air blower, 13 Air path, 14 Air outlet, 15 Drain pan, 17 Drain water reservoir, 18 Drain water discharge port, 20 Heat exchanger, 25 Refrigerant Gas piping, 26 Refrigerant liquid piping, 27a, 27b Temperature sensor, 28a, 28b Lead wire, 29a, 29b Protective tube, 30 Coil support, 30a First surface, 30b Second surface, 30c Third surface, 31 Cut Notch, 32 screw insertion hole, 33 rib, 50 indoor air, 51 secondary air, 52 drain water.

Claims (5)

A heat exchanger that exchanges heat between indoor air sucked from the suction port in the housing of the indoor unit, a refrigerant pipe that has one end connected to the heat exchanger and is disposed on the side of the heat exchanger, and a control unit A temperature sensor having a lead wire connected to the refrigerant pipe, and a coil support installed on the side of the lower part of the heat exchanger to fix the heat exchanger to the housing ,
A ceiling-suspended air conditioner, wherein a lead wire of the temperature sensor is locked to a notch provided in the coil support.   The ceiling-suspended air conditioner according to claim 1, wherein a width of the notch is formed narrower than an outer diameter of the protective tube covering the lead wire.   The notch is formed in an approximately L shape by an insertion portion that opens at the end of the coil support and a bent portion that is continuous with the insertion portion, and the lead wire inserted from the insertion portion is inserted into the bent portion. The ceiling-suspended air conditioner according to claim 1 or 2, wherein   The ceiling-suspended air conditioner according to any one of claims 1 to 3, wherein a partition-like rib is provided in the vicinity of a screw insertion hole that is fixed to the heat exchanger of the coil support.   The ceiling-suspended air conditioner according to any one of claims 1 to 4, wherein the coil support is formed of a metal plate or a plastic material.

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