JP3317204B2 - Air conditioner indoor unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner whose exterior is formed of a synthetic resin, wherein the electric unit is formed of a conductive metal for housing a control device for controlling the air conditioner. The present invention relates to a product box and a wiring structure related to the electrical product box.

[0002]

2. Description of the Related Art Generally, in order to change the operation state of an air conditioner, a remote control is often provided outside the main body of the air conditioner, and the remote control is often used. However, there is a possibility that the remote control is lost or the power supply is cut off. In such a case, a switch is provided in the air conditioner body so that the air conditioner can be operated. In many cases, the switch is installed in an electrical component box in which a control device is housed in order to simplify a wiring structure.

In general, the exterior of an indoor unit of an air conditioner is made of a non-conductive synthetic resin, and an electric component box supported there is electrically insulated from other heat exchangers, blowers and the like. Have been. Furthermore, the electrical box itself is often made of a non-conductive synthetic resin such as plastic, so that a user charged by static electricity or the like touches the electrical box when operating a switch provided on the electrical box. Also, no static electricity was discharged.

On the other hand, when an electric component box made of a conductive material such as a metal is used, static electricity is discharged when a charged user touches the electric component box. By securing a sufficient distance between the control device and the control board, malfunction of the control device due to electrostatic discharge is prevented.

Conventionally, when a 200 V AC power supply is used for an air conditioner, the refrigerant circuit is grounded via an indoor heat exchanger by a ground wire provided with a power cord.

[0006]

When an electric appliance box is made of synthetic resin such as plastic, it burns in a fire,
There was a problem that it might be considered as a source of ignition depending on the situation.

On the other hand, in order to prevent a malfunction of the control device when static electricity is discharged to a metal electrical component box, a control board as a control device must be provided in order to reduce the influence of fluctuations of electric and magnetic fields due to static electricity. Since a sufficient distance was required between the electric component boxes, the size of the electric component box could not be reduced, which hindered the downsizing of the indoor unit and the expansion of the capacity of the heat exchanger for energy saving.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the control device does not malfunction even if a user charged with static electricity touches the electrical component box, and the control device is made of a conductive material such as metal. It is an object of the present invention to provide an electrical component box which is configured and reduced in size.

[0009]

An indoor unit of an air conditioner according to a first aspect of the present invention has a metal electrical component box having a switch operable from the outside and containing a control device inside. in with air conditioner indoor unit, and the electric part box
The switch is electrically connected to a heat exchanger of the indoor unit.
The static electricity charged to the user operating the switch
From the electrical component box to the heat exchanger .

[0010] An indoor unit of an air conditioner according to the second aspect of the present invention is to electrically connect the electrical component box and the heat exchanger of the indoor unit by conductors such as lead wires.

[0011] An indoor unit of an air conditioner according to the third aspect of the invention is electrically connected by contacting said electrical component box and the heat exchanger of the indoor unit directly.

An air conditioner indoor unit according to a fourth aspect of the present invention is an air conditioner having a metal electric component box having a switch operable from outside and a control device inside. In indoor units, the nameplate made of insulating material is
Cover the outer surface of the electrical component box around the switch.
It is attached .

[0013]

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a simplified exploded perspective view showing a main part of a first embodiment of the present invention, and shows a wiring structure relating to an electric component box of an indoor unit of an air conditioner. FIG. 2 is a connection diagram of an indoor unit and an outdoor unit of the air conditioner.

In the figure, reference numeral 1 denotes an electric component box containing a control device, 2 denotes a heat exchanger, 2a denotes a side plate constituting the heat exchanger 2, 2b denotes a refrigerant pipe of the heat exchanger 2, and 2c denotes a heat exchanger. 2, a metal plate connected to the side plate 2a of the heat exchanger 2 for connecting the terminals 9, 4 a screw hole formed in the metal plate 3, and 11 a lead wire. A terminal 9 is mounted on the tip and a terminal 10 is mounted on the other end. Reference numeral 5 denotes a mounting screw for fixing the terminal 9 to the screw hole 4. Reference numeral 6 denotes a metal plate for connecting the electrical component box 1 to the terminal 10, reference numeral 7 denotes a screw hole formed in the metal plate 6, and reference numeral 8 denotes a mounting screw for fixing the terminal 10 to the screw hole 7. 12 is made of a non-conductive material for supporting a heat exchanger, an electrical component box, etc.
This is the exterior of the indoor unit 16. Reference numeral 13 denotes a switch provided on the electric component box 1 so that a user gives an operation command to the air conditioner. 14 is the refrigerant pipe 2b of the heat exchanger 2 and the pipe 1
5 is a pipe attached to the refrigerant pipe 2b of the heat exchanger 2 for forming a refrigerant circuit to the compressor 18 and the heat exchanger 19 of the outdoor unit 17 through the refrigerant circuit 2b.

When the user operates the switch 13 to change the operation content, if the user is charged by static electricity or the like, static electricity is discharged to the electrical component box 1 from a finger approached to operate. The charge is transferred from the metal plate 6 to the heat exchanger 2 electrically connected through the lead wire 11 and the metal plate 3.
To the side plate 2a. Here, since the side plate 2a constituting the heat exchanger 2 is in contact with and electrically connected to the refrigerant pipe 2b, the side plate 2a of the heat exchanger 2 of the indoor unit is connected to the pipe 14 and the pipe 15 as shown in FIG. Thereby, it is electrically connected to a compressor 18 and a heat exchanger 19 which are refrigerant circuits of the outdoor unit 17. As a result, the electric component box 1 is electrically connected to a large number of metal materials as described above, and can be regarded as being grounded to a virtual ground. Even if the electrical component box 1 is touched to cause a discharge, the noise generated by the discharge is cut off by the electrical component box 1 electrically connected to the side plate 2a of the heat exchanger 2 of the indoor unit. The device does not malfunction. In addition, there is no problem even if the refrigerant circuits such as the indoor and outdoor heat exchangers are grounded.

Further, in this embodiment, screws are used for attaching the heat exchanger, the electrical component box and the lead wires. The same effect can be obtained as long as the connection is made.

Furthermore, the same effect can be obtained by attaching the temperature detecting thermistor to the holder of the heat exchanger as a mounting position on the heat exchanger side.

According to this embodiment, even if the charged user touches the electrical component box to discharge the static electricity,
The electric component box cuts off noise due to discharge by escaping electric charges to a refrigerant circuit such as a heat exchanger that is electrically connected, so that malfunction of the control device can be prevented. In addition, a dedicated ground wire for grounding the electrical component box is not required for countermeasures against static electricity, so that the cost can be reduced by reducing the number of parts, and the workability during installation can be improved by eliminating the need for grounding work. Furthermore, even if the electric component box is exposed to dew due to the cool air of the air conditioner, the ground wire is not directly connected from the electric component box to the outside of the main unit. Further, since the indoor heat exchanger and the electric component box can be separated from each other, their positional relationship can be freely set.

Embodiment 2 Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a simplified exploded perspective view of a main part showing a second embodiment of the present invention, and shows a wiring structure related to an electric component box of an indoor unit of an air conditioner. In the figure, reference numeral 22 denotes a metal plate connected to the electrical component box 1 and has a screw hole 23 formed therein. 20 is the side plate 2 of the heat exchanger 2
This is a metal plate connected to a, and has a screw hole 21 formed therein. Reference numeral 24 denotes a screw for fixing the screw hole 21 of the metal plate 20 and the screw hole 23 of the metal plate 22 while electrically connecting them. The other components are the same as those of FIG.

When the user operates the switch 13 to change the operation content, if the user is charged by static electricity or the like, static electricity is discharged to the electrical component box 1 from a finger approached to operate the switch. The electric charges are transferred to the side plates 2 of the heat exchanger 2 through the metal plates 22 and 20 which are electrically connected.
It flows to a. Here, the side plate 2 constituting the heat exchanger 2
a, the refrigerant pipe 2b is electrically connected by contact, so that the side plate 2 of the heat exchanger 2 of the indoor unit as shown in FIG.
“a” is further electrically connected to a compressor 18 and a heat exchanger 19 which are refrigerant circuits of the outdoor unit 17 by pipes 14 and 15. As a result, the electric component box 1 is electrically connected to a large number of metal materials as described above, and can be regarded as being grounded to a virtual ground. Even if the electrical component box 1 is touched to cause a discharge, the noise generated by the discharge is cut off by the electrical component box 1 electrically connected to the side plate 2a of the heat exchanger 2 of the indoor unit. The device does not malfunction. In addition, there is no problem even if the refrigerant circuits such as the indoor and outdoor heat exchangers are grounded.

According to this embodiment, even if the charged user touches the electrical component box to discharge the static electricity,
The electric component box cuts off noise due to discharge by escaping electric charges to a refrigerant circuit such as a heat exchanger that is electrically connected, so that malfunction of the control device can be prevented. In addition, the direct contact between the heat exchanger and the electrical component box eliminates the need for components such as lead wires as in the first embodiment. Cost reduction and improvement in workability can be realized by reducing the number of components. Furthermore, even if the electric component box is exposed to dew due to the cool air of the air conditioner, the ground wire is not directly connected from the electric component box to the outside of the main unit, so that the dew can be prevented from flowing out of the main unit. Also,
The direct contact eliminates the need for a space between the heat exchanger and the electrical component box, and can further reduce the size. Further, in this embodiment, the electrical component box and the heat exchanger are fixed by screws. However, a sufficient effect can be naturally obtained by simply contacting the electrical component box and the heat exchanger.

Embodiment 3 FIG. Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a structural view showing Embodiment 3 of the present invention, which is a structure of an electric component box of an indoor unit of an air conditioner. In the figure, the electric component box 1 is provided with a hole 26 provided inside the electric component box for the user to press a push switch 25 which is a switch for giving an operation command to the air conditioner. Including the surroundings,
It is covered with a seal 27 made of an insulating material, and the rest is the same as FIG.

When the user operates the switch 25 to change the operation contents, even if the user is charged with static electricity or the like and touches the electric component box 1 around the switch 25, the periphery of the switch 25 is made of an insulating material. Since the electric component box 1 is covered with the seal 27, no discharge occurs to the electric component box 1, and malfunction of the control device can be prevented.

In this embodiment, a seal made of an insulating material is used. However, the seal may have a role of a name plate by describing precautions of the product. Insulating material for covering is unnecessary, so that cost reduction and improvement in workability can be realized.

Further, in this embodiment, the push switch and the hole for pushing the push switch are covered with the insulator seal, but the insulator seal is adhered to the periphery of the hole and the edge of the hole or the insulator is applied. Alternatively, the same effect can be obtained by mounting an insulating component around the hole and around the hole.

Embodiment 4 Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a structural diagram showing Embodiment 4 of the present invention, and is a wiring structure related to an electric component box of an indoor unit of an air conditioner. In the figure, 28 is a power plug having a ground wire, 29 is a power cord, 30 is a ground wire provided along with the power cord 29, and 31 is a ground wire 30.
To connect the electrical component box 1 to the electrical component box 1;
A screw hole 36 is formed to secure the terminal 31 to the screw 31. A screw 36 is used to secure the terminal 34 attached to the tip of the ground wire 40 to a screw hole 33 formed in the electric component box 1. Is a metal plate connected to the side plate 2a of the heat exchanger 2,
Reference numeral 38 denotes a screw hole formed in the metal plate 37, and reference numeral 39 denotes a screw for fixing the terminal 41 attached to the tip of the ground wire 40 to the screw hole 38. The power plug 28 is connected to an outlet 42 with a ground terminal. Others are the same as FIG.

When the user operates the switch 13 to change the operation content, if the user is charged with static electricity or the like, the static electricity is discharged to the electrical component box 1 from the finger brought close to the operation. The same applies to the case where the switch contacts the periphery. At this time, the charges are transferred to the ground line 30,
Since the electric component box is electrically connected to the power plug 28 and flows to the ground terminal of the outlet 42, the electric component box shuts off noise due to discharge, thereby preventing malfunction of the control device.

According to this embodiment, even if the charged user touches the electrical component box to operate the switch provided on the electrical component box, the electric charge is transferred to the ground terminal of the outlet electrically connected. The control device does not malfunction because the electric appliance box blocks the noise due to the electric discharge.

When a 200 V AC power supply is used in an air conditioner, a power cord is generally connected to an electric component box for connection to a control device, and a ground wire attached to the power cord is connected to a heat exchanger. However, since the electrical box and the heat exchanger are assembled in separate processes, the method of connecting this ground wire directly to the heat exchanger incorporates both the electrical box and the heat exchanger into the exterior of the indoor unit. The wiring of the power cord cannot be assembled up to the stage, and an operation for preventing the ground wire from being entangled when the electric component box is moved is required. On the other hand, in this embodiment, since the wiring assembly work of both the power cord and the ground wire attached to the power cord can be completed at the time of assembling the electric component box, the ground wire can be prevented from being entangled when the electric component box is moved. Work becomes unnecessary, and the workability of the wiring work at the time of assembling the heat exchanger and the electric component box in the indoor unit in the post-process can be improved.

[0031]

Effect of the Invention indoor unit of an air conditioner according to the first aspect of this invention, charging the user for connecting the heat exchanger of the electric equipment box and the indoor unit electrically, operating the switch
Heat from the metal electrical box
The control device does not malfunction even if static electricity charged to the user is discharged to the electrical component box, and the electrical component box and the indoor unit can be downsized. The earth for grounding the box is not required, so that the cost can be reduced and the operation can be improved.

An indoor unit of an air conditioner according to a second aspect of the present invention has a switch for allowing a user to change an operation state, and is electrically connected to a heat exchanger of the indoor unit and a conductive material such as a lead wire. The control box does not malfunction even if static electricity is discharged to the control box, and the control box can be downsized. In addition, a ground wire for grounding the electrical component box is not required, and the indoor heat exchanger and the electrical component box can be separated from each other, so that their positional relationship can be set freely.

An indoor unit of an air conditioner according to a third aspect of the present invention has a switch for changing a driving state by a user, and is electrically connected to a heat exchanger of the indoor unit by making direct contact therewith. Since the electric device box for storing the control device is provided, even if static electricity is discharged to the electric device box, the control device does not malfunction and the electric device box and the indoor unit can be downsized. In addition, a ground wire for grounding the electrical component box is not required, and a space between the heat exchanger and the electrical component box is not required, and the size of the indoor unit can be further reduced.

[0034] In the indoor unit of an air conditioner according to a fourth aspect of the present invention, the nameplate made of insulating material is provided with the switch.
To cover the outer surface of the electrical component box around the
Therefore, even if a user charged with static electricity touches the switch periphery of the electrical component box when operating the switch, the static electricity does not discharge, so the control device does not malfunction and the electrical component box and the indoor unit can be downsized. And a ground wire for grounding the electrical component box is not required.

[0035]

[Brief description of the drawings]

FIG. 1 is a simplified exploded perspective view of a main part of an indoor unit of an air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is a connection diagram of an indoor unit and an outdoor unit of an air conditioner according to Embodiments 1 and 2 of the present invention.

FIG. 3 is a simplified exploded perspective view of a main part of an indoor unit of an air conditioner according to Embodiment 2 of the present invention.

FIG. 4 is a simplified exploded perspective view of a main part of an indoor unit of an air conditioner according to Embodiment 3 of the present invention.

FIG. 5 is a simplified exploded perspective view of a main part of an indoor unit of an air conditioner according to Embodiment 4 of the present invention.

[Explanation of symbols]

1 electrical component box, 2 indoor unit heat exchanger, 11 lead wire, 13 switch for changing operation status,
16 air conditioner indoor unit, 17 air conditioner outdoor unit, 27 insulator, 29 power cord, 30 ground wire.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 1/00 401

Claims (4)

(57) [Claims] 1. A have operable switch from the outside, the air conditioner indoor unit of the control device having a housing with a metallic electrical component box inside the heat exchange of the electric equipment box and the indoor unit Connect the switch electrically and operate the switch
The static electricity charged to the user is transferred to the metal electrical box
An air conditioner indoor unit, wherein the air is flowed to the heat exchanger . Wherein the indoor unit of an air conditioner according to claim 1, characterized by electrically connecting a conductive material such as heat exchangers and the electrical component box and the lead line of the indoor unit. Wherein the indoor unit of an air conditioner according to claim 1, characterized in that electrical connection by contacting the heat exchanger and the electrical component box of the indoor unit directly. 4. A nameplate seal made of an insulating material in an indoor unit of an air conditioner having a switch operable from the outside and a metal electric box housing a control device inside.
Covers the outer surface of the electrical component box around the switch
An indoor unit of an air conditioner characterized by being attached as follows .