JPH1078242A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize high level safety by a method wherein the box main body of an electrical box provided in an air conditioner is formed by using resin or a resin composition having the fire retardance and self-extinguishing properties of high degree which meet the specified standards. SOLUTION: An application-side heat exchanger 2, a cross flow fan 3, etc., are held between a back panel 10 and a front panel. A fitting plate 11 is fixed at a prescribed position of the back panel 10, and after this fitting plate 11 is fixed on the wall surface of a house, fitting of an air conditioner is conducted. An electrical box 6 is built in a prescribed position of the air conditioner. The box main body of this electrical box 6 is formed by using resin or a resin composition having the high fire retardance and self-extinguishing properties which meet UL standards (standards of Underwriters' Laboratories). Thereby high level safety can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having high safety.

[0002]

2. Description of the Related Art Conventionally, a box body of an electrical box equipped with an air conditioner, which includes a condenser, a relay, and the like, is used when a filter is clogged with dust or the like and the motor is overloaded, or when the relay contacts. It may be overheated and ignited by heat such as a defect, and is made of a flame-retardant resin or the like so as not to spread to other places. However, the conventional flame-retardant resin has self-extinguishing properties, but has a flame-retardant property in which the area hit by the flame burns and the pores become clear. Specifically, Underwriters Laboratories (Underwritter)
s Laboratories) UL standard (UL94V-2 to UL9
4V-0). The box body provided in the air conditioner is strongly required to have higher safety than the conventional level.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioner having a highly flame-retardant box body of an electrical box in which a condenser, a relay and the like are installed, which is provided in the air conditioner. That is.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on such a problem, and as a result, have found that the above-mentioned box body has been replaced by Underwritters Labo.
ratories), formed by using a flame-retardant resin or resin composition that passes the UL standard (UL94-5VA), or by further coating the outer periphery of the box body with a non-flammable material. The main body can be made highly flame-retardant, and if a small hole is provided above this box body, when the inside is overheated, the heat can be dissipated through these small holes, resulting in safer air conditioning. The present invention was found to be an opportunity.

[0005] According to a first aspect of the present invention, the box body of the electrical component box mounted on the air conditioner is UL standard (U).
(L94-5VA). An air conditioner characterized by being formed using a resin or a resin composition having high flame retardancy and self-extinguishing properties, which passes L94-5VA).

According to the invention of claim 2 of the present invention, the box body of the electrical component box mounted on the air conditioner is UL standard (U
L94-5VA), characterized by being formed using a resin or a resin composition having high flame retardancy and self-extinguishing properties, and wherein the outer periphery of the electrical box is covered with a nonflammable material. It is a harmonic machine.

According to a third aspect of the present invention, in the air conditioner according to the first or second aspect, at least one small hole penetrating the box body is provided above the box body of the electrical box. It is characterized by the following.

According to a fourth aspect of the present invention, in the air conditioner according to the third aspect, an inner surface of the air conditioner facing the small hole is coated with a nonflammable material.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A resin having a high flame retardancy and self-extinguishing property which meets the UL standard (UL94-5VA) used in the present invention is a resin which is a single substance of the UL standard (UL94-5VA).
-5VA), a thermoplastic resin or a thermosetting resin having high flame retardancy and self-extinguishing properties, or a combination thereof, and further has a high glass transition point and a high melting point, and constitutes the resin. It is a thermoplastic resin or a thermosetting resin characterized by high bond energy of constituent atoms and high thermal stability, or a combination thereof. Among them, a thermoplastic resin can be preferably used.

Specific examples of the thermoplastic resin include wholly aromatic amides (aramids) in which a linking group having a large intermolecular force is introduced into a polymer main chain and an aromatic ring having good symmetry is introduced. ), Wholly aromatic polyester, aromatic polyether (PPE, PPO, etc.), aromatic polyimide, polyphenylene sulfide (PPS), polysulfone (P
SF), polyethersulfone (PES), polyetheretherketone (PEEK), polyetherimide (PEI), and mixtures thereof.

The UL standard used in the present invention (UL9
4-5VA), a highly flame-retardant and self-extinguishing resin composition is defined as the above-mentioned resin or another resin other than the above (nylon, PBT, PC, etc.) and a halogen-based flame retardant, phosphorus UL flame retardant (U) by blending additive flame retardant such as inorganic flame retardant and inorganic flame retardant, inorganic filler, inorganic fiber, etc.
L94-5VA), which has high flame retardancy and self-extinguishing properties.

As halogen-based flame retardants, tetrabromobisphenol A (TBA), hexabromobenzene,
Brominated and chlorinated paraffins such as decabromodiphenyl ether, tetrabromoethane (TBE), tetrabromobutane (TBB), and hexabromocyclodecane (HBCD), chlorinated polyphenyl, diphenyl chloride,
Chlorine-based compounds such as perchloropentacyclodecane and chlorinated naphthalene may be mentioned, and when used in combination with antimony trioxide or the like, more effects are exhibited.

The phosphorus-based flame retardants include tricresyl phosphate, tri (β-chloroethyl) phosphate, tri (dichloropropyl) phosphate, tri (dibromopropyl) phosphate, and 2,3-dibromopropyl-2,3. And phosphoric acid esters such as -chloropropyl phosphate or halogenated phosphoric acid esters.

Examples of inorganic flame retardants include aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, basic magnesium carbonate, dolomite, hydrotalcite,
Calcium hydroxide, barium hydroxide, hydrate of tin oxide, hydrate of inorganic metal compounds such as borax, zinc borate, zinc metaborate, barium metaborate, zinc carbonate, magnesium-calcium carbonate, calcium carbonate, barium carbonate ,
Examples include magnesium oxide, molybdenum oxide, zirconium oxide, tin oxide, and red phosphorus. These may be used alone or in combination of two or more. Among these, hydrates of at least one metal compound selected from the group consisting of aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, basic magnesium carbonate, dolomite, and hydrotalcite, especially aluminum hydroxide, water Magnesium oxide has a good flame retardant effect and is economically advantageous. Although the particle diameter of these inorganic flame retardants differs depending on the type, the average particle diameter of the above-mentioned aluminum hydroxide, magnesium hydroxide and the like is preferably 20 μm or less, more preferably 10 μm or less.

Examples of the inorganic filler include calcium sulfate, calcium silicate, clay, diatomaceous earth, talc, alumina, silica sand, glass powder, iron oxide, metal powder, graphite,
Silicon carbide, silicon nitride, silica, boron nitride, aluminum nitride, carbon black, mica, glass plate, sericite, pyrophyllite, aluminum flake, graphite, shirasu paroon, metal paroon, glass paroon, pumice, glass fiber, carbon fiber , Whiskers, metal fibers, graphite fibers, silicon carbide fibers, asbestos, wollastonite and the like.

The resin or resin composition used in the present invention may further include an antistatic agent, an antioxidant, an ultraviolet absorber, a lubricant, a nucleating agent, if necessary, without departing from the gist of the present invention.
Known additives such as anti-blocking agents, anti-fogging agents, pigments and dispersants can be arbitrarily added and blended.

The method for manufacturing the box body of the electrical component box in the present invention is not particularly limited, and it can be manufactured by a known method. Specifically, for example, additives and the like are blended as necessary to the resin or the resin composition, and these are dry-blended with a normal tumbler or the like, or a Banbury mixer, a pressure kneader,
A kneading extruder, a twin-screw extruder, a method of melting and kneading with a usual kneading machine such as a roll, uniformly dispersing, and integrally molding a box body at a time by a known injection molding method, or a known method. Examples include a method in which parts of the box body are molded by an extrusion molding method, a compression molding method, an injection molding method, and the like, and a box body is molded by combining these parts.

The outer periphery of the box body is made of glass fiber,
By coating with a non-flammable material such as carbon fiber, graphite fiber, silicon carbide fiber or the like, or a nonwoven fabric, woven fabric or the like made of these, or a metal foil such as an aluminum foil, a higher level of safety of the present invention can be achieved. It is preferable because it can be applied to an air conditioner.

Since the box body is usually a closed type, it is preferable to provide at least one small hole through the box body above the box body. The provision of the small holes is preferable because the heat in the box body can be discharged to the outside through the small holes and a high degree of safety can be imparted to the air conditioner of the present invention. When a small hole penetrating the top plate of the box body is provided in the top plate of the box body, the nonflammable material as described above is attached or laminated on the inner surface of the air conditioner of the present invention opposed to the small hole. It is preferable to cover by such as.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory view showing the inside of an air conditioning apparatus 1. For example, in the case of a cooling operation, an evaporator 2, a cross flow fan 3 and the like are built in, and a hermetic compressor of an outdoor unit (not shown), a condenser The refrigerant supplied through the refrigerant pipe via the decompression device or the like evaporates in the evaporator 2 to generate cold heat, and is returned again to the hermetic type compressor (not shown) through the refrigerant pipe to perform the refrigeration cycle. Has formed. When the cross flow fan 3 is driven, the indoor air is sucked into the indoor unit 1 from the front grill 4 of the indoor unit 1, and the air that has been subjected to heat exchange in the evaporator 2 and cooled to the target temperature is discharged from the outlet 5. It is designed to be blown out into the room.

FIG. 2 is a partially exploded perspective view of the air conditioner 1 of FIG. In this figure, reference numeral 2 denotes a use-side heat exchanger that functions as an evaporator during a cooling operation and as a condenser during a heating operation. 3 is a cross flow fan, 6
Reference numeral denotes an electrical box, and reference numeral 10 denotes a rear panel, which sandwiches the use side heat exchanger 2, the cross flow fan 3, and the like between the front panel 4 and the rear panel. Reference numeral 11 denotes a mounting plate. After fixing the mounting plate 11 to a wall surface of a house, a predetermined position of the rear panel 10 is fixed to the mounting plate 11, and the air conditioner 1 is mounted. The electrical box 6 is built in a predetermined position of the air conditioner 1 indicated by a broken line.

The electrical component box 6 conforms to the UL standard (UL94-5).
Known materials using highly flame-retardant and self-extinguishing materials that pass VA) (for example, Upiace AN30 manufactured by Mitsubishi Engineering-Plastic Corporation, Zylon manufactured by Asahi Kasei Corporation, Noryl manufactured by GE Plastics Corporation) can be used. By the injection molding method.

FIG. 3 is an enlarged view of the electrical component box 6 shown in FIG. 2, and FIG. 4 is an assembly view of the electrical component box 6.
In these figures, 6A is a housing part having an opening on one side, and 6B is a front part formed so as to close this opening. Above the front portion 6B, a plurality of vertically long holes 6C are provided. The front portion 6B is inserted into the housing portion 6A through the opening thereof, and the electrical components 7 and 8 on which electric components and electronic components are mounted are inserted.
The hook portions 9a of the housing portion 6A are elastically provided with 0a and 10b.
a, 9b. Hook part 10a,
10b is a slit-like cut 1 to obtain elasticity.
2 and 13 are provided. Therefore, even when the front portion 6B is fitted into the housing portion 6A, the cuts 12, 13 remain as they are, and together with the hole 6C, function as an exhaust port in the electrical component box 6.

Hot air generated when ignition or combustion occurs in the electrical box 6 is exhausted out of the electrical box 6 through the holes 6C and the cuts 12 and 13. The above-mentioned flame-retardant material is pasted or painted on the area where the exhaust is applied (the inside of the front panel 4 or the rear panel 10 facing the holes 6C, the cuts 12 and 13). The hot air exhausted from 6 prevents both panels from being deformed or even ignited.

[0025]

According to the air conditioner of the present invention, the box body of the built-in electrical box is connected to the underwriters.
UL of Underwritters Laboratories
The box body is highly formed by using a flame-retardant resin or a resin composition that meets the standards (UL94-5VA), or by coating the outer periphery of the box body with a non-flammable material. It can be made flame-retardant, and even if the flame hits directly, there is no hole in the box body, and if the flame disappears, the fire will be extinguished by itself, so it has a high degree of safety. By providing a small hole that penetrates the box body above the box body, when the inside is overheated, heat can be radiated through the small hole, and a safer air conditioner can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a partially exploded perspective view of the air conditioner shown in FIG.

FIG. 3 is an enlarged view of the electrical box shown in FIG. 2;

FIG. 4 is an assembly diagram of the electrical box shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Use side heat exchanger (evaporator) 3 Cross flow fan 4 Front panel 5 Outlet 6 Electrical box 6A Housing part 6B Front part 6C Hole 7,8 Electrical board 9a, 9b Hook section 10a, 10b Hook Part 11 Mounting plate 12, 13 Notch

Claims (4)

[Claims] 1. A box body of an electrical component box mounted on an air conditioner is formed of a highly flame-retardant, self-extinguishing resin or a resin composition that meets UL standards (UL94-5VA). An air conditioner characterized by that: 2. The box body of an electrical box mounted on an air conditioner is formed of a highly flame-retardant, self-extinguishing resin or a resin composition that meets UL standards (UL94-5VA). An air conditioner, wherein the outer periphery of the electrical component box is covered with a nonflammable material. 3. The air conditioner according to claim 1, wherein at least one small hole penetrating the box body is provided above the box body of the electrical box. 4. The air conditioner according to claim 3, wherein an inner surface of the air conditioner facing the small hole is coated with a nonflammable material.