Air conditioner indoor unit

Abstract

To provide an indoor unit of an air conditioner which prevents spreading of fire from an electric component box.SOLUTION: An indoor unit of an air conditioner according to one embodiment of the invention includes an electric component box having a body portion and a lid portion and configured to house electric components. The electric component box comprises: the lid portion; and the body portion in which the lid portion is fitted. In the electric component box, a first fire spread prevention member formed of a first incombustible material having flexibility is provided at a joint portion formed when the body portion and the lid portion are combined or a portion near the joint portion.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to an indoor unit of an air conditioner. [Background technology]

[0002] Some indoor units of air conditioners are equipped with an electrical component box that houses circuit boards, electrical components, and the like. In the case of an electrical component box, there is a technique for forming the electrical component box from a non-combustible material or a flame-retardant material in order to prevent the fire from spreading to the outside of the electrical component box in the event of a fire inside the electrical component box (see Patent Document 1). For example, sheet metal is used as the non-combustible material, and for example, flame-retardant resin is used as the flame-retardant material. When the electrical component box is formed from this flame-retardant resin, the electrical component box is formed by, for example, injection molding. This provides greater freedom in the shape of the electrical component box compared to when the electrical component box is formed from sheet metal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-096465 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the electrical equipment box is made of a flame-retardant resin, the following phenomenon may occur.

[0005] For example, when an electrical equipment box is composed of a lid and a main body into which the lid is fitted, there is a possibility that a fire may spread from the joint (seam) between the lid and the main body to the outside of the electrical equipment box. For example, if a fire breaks out inside the electrical equipment box, and air (oxygen) flows into the electrical equipment box through the gap in the joint, the flames will increase in intensity near the joint, causing the flame-retardant resin at the joint to melt. As a result, the joint will open, and the flames will leak out from this opening, which may cause the fire to spread outside the electrical equipment box.

[0006] One possible solution to this problem is to add non-resin sheet metal near the joints to reinforce the strength (heat resistance) of the areas near the joints. However, depending on the shape of the electrical equipment box, it can be difficult to process the sheet metal to fit the shape, so there is a need for a simpler method to prevent the spread of fire from the electrical equipment box.

[0007] In view of the above circumstances, an object of the present invention is to provide an indoor unit for an air conditioner that prevents the spread of fire from an electrical component box. [Means for solving the problem]

[0008] In order to achieve the above object, an indoor unit for an air conditioner according to one aspect of the present invention is an indoor unit for an air conditioner that has a main body portion and a cover portion, and is provided with an electrical component box that houses electrical components. In the electrical equipment box, a first fire spread prevention member made of a flexible first non-flammable material is provided at the joint when the main body and the cover body are combined, or in a portion adjacent to the joint.

[0009] Such an air conditioner indoor unit can prevent fire from spreading from the electrical equipment box.

[0010] In the indoor unit of the above-mentioned air conditioner, in addition to the first fire spread prevention member, a second fire spread prevention member formed of a second non-combustible material having a harderness than the first non-combustible material is provided at the joint or in the vicinity of the joint, and the second fire spread prevention member may be positioned other than the portion where the first fire spread prevention member is provided.

[0011] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0012] In the air conditioner indoor unit described above, the first fire spread prevention member may be disposed either outside or inside the electrical component box.

[0013] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0014] In the above air conditioner indoor unit, the first fire spread prevention members may be arranged both outside and inside the electrical component box.

[0015] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0016] In the air conditioner indoor unit described above, the second fire spread prevention member may be disposed outside the electrical component box.

[0017] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0018] In the above-mentioned air conditioner indoor unit, the first non-flammable material is at least one of a conductive material and an insulating material, and the first fire spread prevention member may be formed from at least one of the conductive material and the insulating material.

[0019] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0020] In the indoor unit of the above-mentioned air conditioner, the first fire spread prevention member formed of the conductive material may be arranged on the outside of the electrical equipment box, and the first fire spread prevention member formed of the insulating material may be arranged on the inside of the electrical equipment box.

[0021] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0022] In the air conditioner indoor unit described above, the second non-combustible material may be made of a metallic material.

[0023] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0024] In the indoor unit of the air conditioner described above, the main body portion has a first base portion and a first side portion that is connected to the first base portion and stands up from the first base portion, the lid portion has a second base portion and a second side portion that is connected to the second base portion and stands up from the second base portion, the first base portion has a first main surface facing the second base portion and a second main surface opposite to the first main surface, the second base portion has a third main surface facing the first base portion and a fourth main surface opposite the third main surface, When the main body and the cover are combined, The seam is, a seam portion where the first base portion and the second side portion are joined; an overlapping portion where the first side portion and the second side portion overlap and join; Including, The first fire spread prevention member may be provided on at least one of the first main surface and the second main surface along the seam.

[0025] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0026] In the indoor unit of the air conditioner described above, the first non-flammable material is at least one of a conductive material and an insulating material, The first fire spread prevention member is formed of at least one of the conductive material and the insulating material, The first fire spread prevention member made of the insulating material is provided on the first main surface, The first fire spread prevention member made of the conductive material may be provided on the second main surface.

[0027] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0028] In the air conditioner indoor unit described above, the first fire spread prevention member may be provided on the first side portion forming the overlapping portion, inside the electrical component box.

[0029] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0030] In the air conditioner indoor unit described above, the first fire spread prevention member may be made of an insulating material.

[0031] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0032] In the above air conditioner indoor unit, the first fire spread prevention member may be provided on the second side adjacent to the seam on at least one of the inside and the outside of the electrical component box.

[0033] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0034] In the indoor unit of the air conditioner described above, the first non-flammable material is at least one of a conductive material and an insulating material, The first fire spread prevention member is formed of at least one of the conductive material and the insulating material, The second side portion may have a first fire spread prevention member formed of the insulating material provided inside the electrical equipment box, and a first fire spread prevention member formed of the conductive material provided outside the electrical equipment box.

[0035] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box.

[0036] In the indoor unit of the air conditioner described above, the first fire spread prevention member is provided on the second side portion adjacent to the seam portion on the outside of the electrical equipment box, The second fire spread prevention member and the first fire spread prevention member may be arranged side by side along the second side portion.

[0037] Such an air conditioner indoor unit can better prevent fire from spreading from the electrical component box. Effect of the Invention

[0038] As described above, according to the present invention, there is provided an indoor unit for an air conditioner that prevents the spread of fire from an electrical component box. [Brief description of the drawings]

[0039] [Figure 1] Fig. 1(a) is a schematic perspective view showing an overview of an air conditioner of the present embodiment, and Fig. 1(b) is a schematic block diagram showing an overview of a refrigerant circuit of the air conditioner of the present embodiment. [Diagram 2] 2(a) and (b) are schematic perspective views showing the right side portion of the indoor unit of the air conditioner shown in FIG. 1(a). [Diagram 3] FIG. 2 is a schematic perspective view showing an electrical component box. [Figure 4] 4 is a schematic perspective view showing how the main body and the lid are combined to form the electrical equipment box shown in FIG. 3. FIG. [Diagram 5] FIG. 2 is a schematic perspective view showing an electrical component box. [Figure 6] 6 is a schematic perspective view showing how the main body and the cover are combined to form the electrical component box shown in FIG. 5. FIG. [Figure 7] FIG. 2 is a schematic perspective view showing an electrical component box. [Figure 8] 8 is a schematic perspective view showing how the main body and the cover are combined to form the electrical equipment box shown in FIG. 7. FIG. [Figure 9] 1 is a schematic perspective view showing a state in which a fire spread prevention member is provided in an electrical equipment box. FIG. [Figure 10] 1 is a schematic perspective view showing a state in which a fire spread prevention member is provided in an electrical equipment box. FIG. [Figure 11]11 is a schematic perspective view showing an example in which a first fire spread prevention member is disposed on a main body of an electrical component box. FIG. [Figure 12] 11 is a schematic perspective view showing another example in which a first fire spread prevention member is disposed on a main body of an electrical component box. FIG. [Figure 13] 11 is a schematic perspective view showing an example in which a first fire spread prevention member is disposed on a cover body portion of an electrical component box. FIG. [Figure 14] 1 is a schematic perspective view showing an electrical component box provided with a second fire spread prevention member in addition to a first fire spread prevention member; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. XYZ axis coordinates may be introduced in each drawing. In addition, the same reference numerals may be used to designate the same components or components having the same functions, and after describing the components, the description may be omitted as appropriate.

[0041] (Air conditioner) Fig. 1(a) is a schematic perspective view showing an overview of an air conditioner of this embodiment. Fig. 1(b) is a schematic block diagram showing an overview of a refrigerant circuit of an air conditioner of this embodiment. Figs. 1(a) and (b) show an example of an air conditioner of this embodiment, but the present invention is not limited to this example. In the following, "connection" means that a heat exchanger and a pressure reducing device, which are components of the refrigerant circuit, are connected by piping (refrigerant pipes) shown by solid lines in Fig. 1(b), thereby forming a refrigerant circuit.

[0042] As shown in Fig. 1(a), the air conditioner 1 comprises an indoor unit 20 installed indoors, and an outdoor unit 30 installed outdoors. The indoor unit 20 and the outdoor unit 30 are connected by piping 21a and piping 21f. Furthermore, as shown in Fig. 1(b), the air conditioner 1 comprises a control device 40 in addition to the indoor unit 20 and the outdoor unit 30. The air conditioner 1 is an air conditioner capable of cooling operation and heating operation. In the indoor unit 20, the left-right direction is the X-axis direction, the front-rear direction (depth direction) is the Y-axis direction, and the up-down direction is the Z-axis direction.

[0043] The indoor unit 20 is attached to a wall inside the room. The indoor unit 20 has an indoor heat exchanger 200, a temperature sensor 240, and an indoor fan 250. The indoor heat exchanger 200, the temperature sensor 240, and the indoor fan 250 are housed inside a housing 260 of the indoor unit 20 shown in FIG. 1(a). The indoor unit 20 also has an electrical component box 100. The housing 260 includes a top plate 260t, a right side plate 260r, a left side plate 260l, a bottom plate 260b, and a front plate (front panel) 260f. Each of these plates is formed of, for example, resin. Furthermore, when the indoor unit 20 is attached to the wall, the side of the front plate 260f is the front side, and the side opposite the front side is the back side.

[0044] 1(b) is, for example, a heat exchanger having a plurality of metal fins and a plurality of heat transfer tubes. The temperature sensor 240 detects the temperature of the air in the room in which the indoor unit 20 is installed. The temperature sensor 240 is, for example, a thermistor.

[0045] The outdoor unit 30 has an outdoor heat exchanger 300, a compressor 310, a four-way valve 320, a pressure reducing device 330, a temperature sensor 340, and an outdoor fan 350. The outdoor heat exchanger 300, the compressor 310, the four-way valve 320, the pressure reducing device 330, the temperature sensor 340, and the outdoor fan 350 are housed in a housing 360 of the outdoor unit 30 shown in FIG. 1(a).

[0046] 1(b) includes, for example, a plurality of metal fins and a plurality of heat transfer tubes. The pressure reducing device 330 is, for example, an expansion valve.

[0047] The compressor 310 is connected between the indoor heat exchanger 200 and the outdoor heat exchanger 300. Furthermore, a four-way valve 320 is connected between the indoor heat exchanger 200 and the compressor 310 and between the outdoor heat exchanger 300 and the compressor 310.

[0048] The outdoor heat exchanger 300 is connected between the four-way valve 320 and the pressure reducing device 330. The pressure reducing device 330 is connected between the outdoor heat exchanger 300 and the indoor heat exchanger 200. The four-way valve 320, the outdoor heat exchanger 300, and the pressure reducing device 330 are connected in series. The outdoor fan 350 is disposed near the outdoor heat exchanger 300.

[0049] The temperature sensor 340 detects the temperature of the outdoor heat exchanger 300. An example of the temperature sensor 340 is a thermistor.

[0050] The control device 40 controls the indoor unit 20 and the outdoor unit 30. The control device 40 has an indoor unit control unit (not shown) arranged in the indoor unit 20, and an outdoor unit control unit (not shown) arranged in the outdoor unit 30. Of these, the indoor unit control unit is included in a circuit board 41 (described later) housed in an electrical component box 100 shown in Fig. 1(a). The electrical component box 100 is attached to a side portion 270 on a side surface of the indoor unit 20 (for example, the side of the right side panel 260r) with the indoor unit 20 attached to a wall.

[0051] The pipe 21a connects the indoor heat exchanger 200 and the pressure reducing device 330. The pipe 21b connects the pressure reducing device 330 and the outdoor heat exchanger 300. The pipe 21c connects the outdoor heat exchanger 300 and the four-way valve 320. The pipe 21d connects the four-way valve 320 and the compressor 310. The pipe 21e connects the compressor 310 and the four-way valve 320. The pipe 21f connects the four-way valve 320 and the indoor heat exchanger 200.

[0052] Figures 2(a) and (b) are schematic perspective views showing the right side of the indoor unit of the air conditioner shown in Figure 1(a). Figure 2(a) shows a state in which the circuit board 41 is housed inside the main body 110 of the electrical component box 100, and Figure 2(b) shows a state in which the cover body 120 of the electrical component box 100 has been removed.

[0053] The circuit board 41 is equipped with a microcomputer and the like that form the indoor unit control unit as described above. The indoor unit control unit controls, for example, the rotation speed of the indoor fan 250. The circuit board 41 is housed in the main body 110 of the electrical component box 100. The circuit board 41 is fixed to the main body 110 by, for example, a fixing member (not shown) such as a screw. In addition, a drive mechanism (motor) 251 that drives the indoor fan 250 (FIG. 1(b)) of the indoor unit 20 is disposed below the circuit board 41.

[0054] (Electrical equipment box) 3, 5, and 7 are schematic perspective views showing the electrical equipment box. In each of FIG. 3, 5, and 7, the angle at which the electrical equipment box 100 is viewed is different. For example, FIG. 3 shows the electrical equipment box 100 attached to the indoor unit 20 as viewed diagonally downward from the right side. FIG. 5 shows the electrical equipment box 100 attached to the indoor unit 20 as viewed diagonally upward from the right side. FIG. 7 shows the electrical equipment box 100 attached to the indoor unit 20 as viewed diagonally downward from the left side. FIG. 4 is a schematic perspective view showing how the main body and the cover are combined to form the electrical equipment box in the electrical equipment box shown in FIG. 3. FIG. 6 is a schematic perspective view showing how the main body and the cover are combined to form the electrical equipment box in the electrical equipment box shown in FIG. 5. Fig. 8 is a schematic perspective view showing how the main body and the lid are combined to form the electrical component box shown in Fig. 7. In Figs. 4, 6 and 8, the main body 110 and the lid 120 are combined, for example, by moving them in the direction of the arrows to form the electrical component box 100.

[0055] As shown in FIG. 3, FIG. 5, and FIG. 7, the electrical equipment box 100 has a main body 110 and a cover 120. An internal space 100h is formed inside the electrical equipment box 100. The internal space 100h accommodates electrical equipment in the indoor unit 20 (for example, a circuit board 41 on which a microcomputer forming an indoor unit control unit is mounted). The main body 110 and the cover 120 are formed of a flame-retardant material, for example, a flame-retardant resin, for the purpose of suppressing the spread of fire from the electrical equipment accommodated inside to the outside of the electrical equipment box 100. In addition, the surface of the main body 110 facing the internal space 100h is defined as a first main surface 111a, and the surface of the main body 110 facing the outside is defined as a second main surface 111b. Moreover, the surface of the lid body 120 facing the internal space 100h is referred to as a third main surface 121a, and the surface of the lid body 120 facing the outside is referred to as a fourth main surface 121b.

[0056] As shown in FIG. 4, FIG. 6, and FIG. 8, the main body 110 has a first base 111 and a first side 112. The first side 112 is connected to the first base 111 and is raised from the first base, for example, substantially perpendicularly. Here, substantially perpendicular includes a completely perpendicular state as well as a state close to perpendicular. The first side 112 has a side 112a (first side wall), a side 112b (second side wall), and a side 112c (third side wall). The side 112a and the side 112b are connected to each other substantially perpendicularly. The side 112b and the side 112c are connected to each other substantially perpendicularly. The side 112a and the side 112c face each other. Here, substantially perpendicular includes a completely perpendicular intersecting state as well as a nearly perpendicular intersecting state. In addition, the inner surface of the side portion 112a is referred to as an inner surface 112aa, and the surface opposite to the inner surface 112aa is referred to as an outer surface 112ab.

[0057] As described above, the first base portion 111 has a first main surface 111a and a second main surface 111b which is the surface opposite to the first main surface 111a. The circuit board 41 shown in Fig. 2(b) is fixed to the first main surface 111a of the first base portion 111 surrounded by the side portion 112a, the side portion 112b, and the side portion 112c. Note that in the main body portion 110, a portion provided below the side portion 112c is a motor case portion 110m which houses a part of the drive mechanism 251 shown in Fig. 2(b).

[0058] The cover body 120 has a second base portion 121 and a second side portion 122. The second side portion 122 is connected to the second base portion 121 and is raised from the second base portion 121, for example, substantially perpendicularly. The second side portion 122 has a side portion 122a (fourth side wall portion), a side portion 122b (fifth side wall portion), and a side portion 122c (sixth side wall portion). The side portion 122a and the side portion 122b are connected to each other by intersecting at an obtuse angle. The side portion 122b and the side portion 122c are connected to each other by intersecting at an obtuse angle. The side portion 122a and the side portion 122c are disposed so as to be substantially perpendicular to each other. In addition, in the side portion 122a, the inner surface is defined as an inner surface 122aa, and the surface opposite to the inner surface 122aa is defined as an outer surface 122ab. Moreover, in the side portion 122c, the inner surface is defined as an inner surface 122ca, and the surface opposite to the inner surface 122ca is defined as an outer surface 122cb.

[0059] As described above, the second base portion 121 has the third main surface 121a and the fourth main surface 121b opposite to the third main surface 121a. When the main body portion 110 and the cover portion 120 are combined, the third main surface 121a of the second base portion 121 faces the first main surface 111a of the first base portion 111. In addition, the circuit board 41 (FIG. 2(b)) is located between the first main surface 111a of the first base portion 111 and the third main surface 121a of the second base portion 121.

[0060] In the electrical equipment box 100, when the main body 110 and the cover 120 are assembled, a seam 150 between the main body 110 and the cover 120 is formed. Here, the "seam" may refer to a portion formed by butting the ends of the main body 110 and the cover 120, or a portion formed by overlapping parts of the surfaces of the main body 110 and the cover 120. In each of Figs. 3, 5, and 7, a portion with a dot is shown as the seam 150. The seam 150 includes a seam portion 151 and an overlapping portion 152. Furthermore, the seam portion 151 includes a seam portion 151a and a seam portion 151b. In the seam portion 151, a portion of the first base portion 111 and a portion of the second side portion 122 shown in Fig. 4 are butted against each other. At the overlapping portion 152, a part of the first side portion 112 and a part of the second side portion 122 shown in FIG. 4 are overlapped and joined together.

[0061] In this embodiment, the seam 151a is formed by joining the first end 111e1 of the base 111 in the main body 110 and the side 122b of the second side 122 in the lid 120. The seam 151b is formed by joining the second end 111e2 of the base 111 in the main body 110 and the side 122c of the second side 122 in the lid 120.

[0062] The overlapping portion 152 is formed by overlapping a side portion 112a of the first side portion 112 of the main body portion 110 with a side portion 122a of the second side portion 122 of the cover portion 120. That is, the overlapping portion 152 is formed by overlapping an outer surface 112ab of the side portion 112a of the main body portion 110 with an inner surface 122aa of the side portion 122a of the cover portion 120. That is, the side portion 112a is provided more inward than the side portion 122a in the electrical component box 100.

[0063] (Fire prevention materials) In the electrical equipment box 100, a fire spread prevention member is disposed on either the outside or the inside of the electrical equipment box 100. An adhesive layer (adhesive layer) is interposed between the electrical equipment box 100 and the fire spread prevention member. The adhesive is not particularly limited and may be appropriately selected from known adhesives such as acrylic adhesives, rubber adhesives, silicone adhesives, urethane adhesives, polyester adhesives, and styrene-diene block copolymer adhesives. In the following, in this embodiment, an example in which the fire spread prevention member is disposed on both the outside and the inside of the electrical equipment box 100 is shown.

[0064] 9(a) to 10(b) are schematic perspective views showing a state in which a fire spread prevention member is provided in an electrical component box. In Fig. 9(a) and (b), the outline of the fire spread prevention member arranged inside the electrical component box 100 is shown by a dashed line. In Fig. 10(a) and (b), the outline of the fire spread prevention member arranged outside the electrical component box 100 is shown by a solid line.

[0065] In the electrical equipment box 100, a first fire spread prevention member 1000 is provided at the joint 150 or a portion close to the joint 150. The first fire spread prevention member 1000 includes a fire spread prevention member 1001, a fire spread prevention member 1002, a fire spread prevention member 1003, a fire spread prevention member 1004, and a fire spread prevention member 1005. Each of the first fire spread prevention members 1000 is formed of a sheet-like, flexible non-combustible material (first non-combustible material). For example, the non-combustible material (first non-combustible material) is at least one of a conductive material and an insulating material. The conductive material is, for example, a metal such as aluminum. The insulating material is, for example, a mineral such as mica. When using a conductive material as the first non-combustible material, it is preferable to use a material having a higher heat resistance than the insulating material.

[0066] Of the first fire spread prevention member 1000, fire spread prevention members 1001, 1002, and 1003 are provided inside the electrical component box 100. Each of the fire spread prevention members 1001, 1002, and 1003 is formed of an insulating material. Also, of the first fire spread prevention member 1000, fire spread prevention members 1004 and 1005 are provided outside the electrical component box 100. Each of the fire spread prevention members 1004 and 1005 is formed of a conductive material.

[0067] FIG. 11 is a schematic perspective view showing an example in which a first fire spread prevention member is disposed on a main body of an electrical component box.

[0068] Of the first fire spread prevention member 1000, the fire spread prevention member 1001 is provided on the side portion 112a of the first side portion 112 in the main body portion 110. In this embodiment, the fire spread prevention member 1001 is provided on the inner surface 112aa of the side portion 112a on the inside of the main body portion 110. The fire spread prevention member 1001 is formed of an insulating material.

[0069] 12(a) and (b) are schematic perspective views showing another example in which a first fire spread prevention member is disposed on the main body of an electrical component box.

[0070] Of the first fire spread prevention member 1000, the fire spread prevention member 1002 is provided along the first end 111e1 and the second end 111e2 on the first main surface 111a of the main body 110 (FIG. 12(a)). The fire spread prevention member 1002 is formed of an insulating material. Also, of the first fire spread prevention member 1000, the fire spread prevention member 1005 is provided along the first end 111e1 on the second main surface 111b of the main body 110. The fire spread prevention member 1005 is formed of a conductive material. Either the fire spread prevention member 1002 or the fire spread prevention member 1005 does not have to be provided on the main body 110.

[0071] 13(a) and 13(b) are schematic perspective views showing an example in which a first fire spread prevention member is disposed on a cover body portion of an electrical component box.

[0072] Of the first fire spread prevention member 1000, the fire spread prevention member 1003 is provided on the inner surface 122ca of the side portion 122c of the second side portion 122 in the cover body portion 120. The fire spread prevention member 1003 is formed of an insulating material. Also, of the first fire spread prevention member 1000, the fire spread prevention member 1004 is provided on the outer surface 122cb of the side portion 122c of the second side portion 122. The fire spread prevention member 1004 is formed of a conductive material. Either the fire spread prevention member 1003 or the fire spread prevention member 1004 does not have to be provided on the cover body portion 120.

[0073] 14(a) and (b) are schematic perspective views showing an electrical component box provided with a second fire spread prevention member in addition to a first fire spread prevention member.

[0074] In addition to the first fire spread prevention member 1000, a second fire spread prevention member 2000 is provided at the seam 150 or a portion adjacent to the seam 150. The second fire spread prevention member 2000 is disposed in a portion other than the portion where the first fire spread prevention member 1000 (not shown in FIGS. 14(a) and (b)) is provided.

[0075] The second fire spread prevention member 2000 is disposed on the outside of the electrical equipment box 100. The second fire spread prevention member 2000 includes, for example, a fire spread prevention member 2001 (FIG. 14(a)) and a fire spread prevention member 2002 (FIG. 14(b)). For example, the fire spread prevention member 2001 covers at least a part of each of the second base portion 121, the side portion 122a, and the side portion 122b of the cover portion 120 from the outside of the electrical equipment box 100. In addition, the fire spread prevention member 2002 covers at least a part of the first base portion 111 of the main body portion 110 from the outside of the electrical equipment box 100. A part of the fire spread prevention member 2001 and the fire spread prevention member 1004 are arranged along the side portion 122a, the side portion 122b, and the side portion 122c of the cover portion 120.

[0076] Each of the fire spread prevention members 2001, 2002 is formed of a second non-combustible material having a higher hardness (e.g., Mohs hardness) than a flexible non-combustible material (first non-combustible material). The second non-combustible material is formed of a metal material such as iron, stainless steel, aluminum, etc., and in this embodiment, each of the fire spread prevention members 2001, 2002 is formed by bending a metal plate.

[0077] (action) When an electrical equipment box is formed by fitting a resin main body and a resin lid together, there is a possibility that a fire may spread from the seam between the main body and the lid to the outside of the electrical equipment box, for example, for the following reasons.

[0078] For example, if a circuit board inside an electrical equipment box catches fire and air flows into the box through a gap in the seam, the flames will grow stronger near the seam. Next, the resin near the seam will soften due to the heat of the flames, and the resin will deform due to gravity and stress, widening the gap in the seam. As a result, the flames will leak out from the widened seam, and the fire may spread outside the electrical equipment box.

[0079] As a countermeasure against the above-mentioned fire spread, a method of reinforcing the strength (heat resistance) of the vicinity of the joint by adding a material that does not easily deform due to heat, such as a metal plate as in this embodiment, to the vicinity of the joint is considered. However, depending on the external shape of the electrical equipment box, it may be difficult to process the metal plate to match that shape, and therefore a simpler method is required to prevent the spread of fire from the electrical equipment box.

[0080] In contrast, in the electrical equipment box 100 of this embodiment, a sheet-like flexible first fire spread prevention member 1000 is provided at the seam 150 of the electrical equipment box 100 or at a portion adjacent to the seam 150. As a result, even if the circuit board 41 inside the electrical equipment box 100 catches fire, the gap at the seam 150 is less likely to deform or spread because the thermal strength is increased by the first fire spread prevention member 1000, which is highly heat-resistant and made of a noncombustible material, in the main body part 110 or the cover part 120 near the seam 150. This prevents the seam from spreading due to ignition, causing flames to leak out and the fire to spread outside the electrical equipment box.

[0081] In addition, since the first fire spread prevention member 1000 is positioned above the electrical equipment box 100, even if a fire breaks out on the circuit board 41 and the flames reach above the electrical equipment box 100, deformation of the seam 150 above the electrical equipment box 100 is less likely to occur.

[0082] Moreover, since the first fire spread prevention member 1000 is in a sheet shape and has plasticity, the first fire spread prevention member 1000 can be easily attached to the electrical component box 100 in accordance with the external shape of the electrical component box 100.

[0083] In addition, the fire spread prevention members 1001, 1002, and 1003 disposed inside the electrical equipment box 100 are made of an insulating material, so that electrical short circuits are unlikely to occur between the electrical components mounted on the circuit board 41 and the fire spread prevention members 1001, 1002, and 1003. On the other hand, the above-mentioned electrical short circuit does not occur outside the electrical equipment box 100. For this reason, by providing the fire spread prevention members 1004 and 1005 made of a conductive material having a higher heat resistance than an insulating material on the outside of the electrical equipment box 100, deformation of the joint 150 of the electrical equipment box 100 can be more effectively prevented. Note that, as long as the distance between the electrical equipment box 100 and the circuit board 41 inside the electrical equipment box 100 can be secured to a degree that does not cause an electrical short circuit, the fire spread prevention members 1001, 1002, and 1003 may be made of a conductive material. Furthermore, when a device or member that can cause an electrical short circuit is disposed outside the electrical component box 100 near the electrical component box 100, the fire spread prevention members 1004, 1005 may be formed from an insulating material.

[0084] In addition to the first fire spread prevention member 1000, the electrical equipment box 100 may be provided with a second fire spread prevention member 2000 made of a non-combustible material harder than the first fire spread prevention member 1000, and the arrangement of the second fire spread prevention member 2000 increases the mechanical strength near the seam 150. This further prevents the seam from widening, causing flames to leak out and the fire to spread outside the electrical equipment box.

[0085] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made. Each embodiment is not limited to an independent form, and can be combined as far as technically possible. [Explanation of symbols]

[0086] 1. Air conditioner 20…Indoor unit 21a, 21b, 21c, 21d, 21e, 21f...Piping 30...Outdoor unit 40...Control device 41...Circuit board 100…Electrical equipment box 100h…Internal space 110m…Motor case 110...Main body 111...first base part 111a...first principal surface 111b…Second main surface 111e1...First end 111e2…Second end 112...first side 112a...side portion (first side wall portion) 112b...side portion (second side wall portion), 112c...side portion (third side wall portion) 112aa…inner surface 112ab…outer surface 120…Cover body 121a…Third main surface 121b…Fourth main surface 121...second base part 122…Second side 122a...side portion (fourth side wall portion) 122b...side portion (fifth side wall portion) 122c...side portion (sixth side wall portion) 122ca…inner surface 122cb…Outer surface 122aa…inner surface 122ab…outer surface 150…seam 151…Joint 151a, 151b...seam portion 152…Overlapped section 1000…First fire prevention member 2000…Second fire prevention material 1001, 1002, 1003, 1004, 1005, 2001, 2002...Fire prevention materials 200…Indoor heat exchanger 240...Temperature sensor 250…Indoor fan 251...Drive mechanism 260…Housing 260b…bottom plate 260l…Left side plate 260t…Tabletop 260r…Right side plate 260f…front plate 270…Side 300...Outdoor heat exchanger 310…Compressor 320...Four-way valve 330…Decompression device 340...Temperature sensor 350…Outdoor fan 360…Housing

Claims

1. An indoor unit of an air conditioner having a main body and a cover body that is combined with the main body and an electrical equipment box that houses electrical equipment, In the electrical equipment box, a first fire spread prevention member made of a flexible first noncombustible material is provided at a joint between the main body and the lid body or in a portion adjacent to the joint when the main body and the lid body are assembled, in addition to the main body and the lid body. The main body portion has a first base portion and a first side portion that is connected to the first base portion and rises from the first base portion, the lid portion has a second base portion and a second side portion that is connected to the second base portion and stands up from the second base portion, the first base portion has a first main surface facing the second base portion and a second main surface opposite to the first main surface, the second base portion has a third main surface facing the first base portion and a fourth main surface opposite to the third main surface, When the main body and the cover are combined, The seam is, a seam portion where the first base portion and the second side portion are joined; an overlapping portion where the first side portion and the second side portion overlap and join; Including, The first fire spread prevention member is provided on at least one of the first main surface and the second main surface along the seam. Air conditioner indoor unit.

2. An indoor unit of an air conditioner having a main body and a cover body that is combined with the main body and an electrical equipment box that houses electrical equipment, In the electrical equipment box, a first fire spread prevention member made of a flexible first noncombustible material is provided at a joint between the main body and the lid body or in a portion adjacent to the joint when the main body and the lid body are assembled, in addition to the main body and the lid body. The main body portion has a first base portion and a first side portion that is connected to the first base portion and rises from the first base portion, the lid portion has a second base portion and a second side portion that is connected to the second base portion and stands up from the second base portion, the first base portion has a first main surface facing the second base portion and a second main surface opposite to the first main surface, the second base portion has a third main surface facing the first base portion and a fourth main surface opposite to the third main surface, When the main body and the cover are combined, The seam is, a seam portion where the first base portion and the second side portion are joined; an overlapping portion where the first side portion and the second side portion overlap and join; Including, The first fire spread prevention member is provided on the first side portion forming the overlapping portion inside the electrical component box. Air conditioner indoor unit.

3. An indoor unit of an air conditioner according to claim 1 or 2, In addition to the first fire spread prevention member, a second fire spread prevention member made of a second non-combustible material having a hardness higher than that of the first non-combustible material is provided at the joint or a portion adjacent to the joint, separately from the main body and the cover, and the second fire spread prevention member is disposed at a portion other than where the first fire spread prevention member is provided. Air conditioner indoor unit.

4. An indoor unit of an air conditioner according to claim 1, The first fire spread prevention member is disposed on either the outside or the inside of the electrical equipment box. Air conditioner indoor unit.

5. An indoor unit of an air conditioner according to claim 1 or 2, The first fire spread prevention member is disposed on both the outside and the inside of the electrical equipment box. Air conditioner indoor unit.

6. An indoor unit of an air conditioner according to claim 3, The second fire spread prevention member is disposed outside the electrical equipment box. Air conditioner indoor unit.

7. An indoor unit of an air conditioner according to claim 1, The first non-combustible material is at least one of a conductive material and an insulating material, The first fire spread prevention member is formed of at least one of the conductive material and the insulating material. Air conditioner indoor unit.

8. An indoor unit of an air conditioner according to claim 7, the first fire spread prevention member made of the conductive material is disposed on an outer side of the electrical equipment box, The first fire spread prevention member made of the insulating material is disposed inside the electrical equipment box. Air conditioner indoor unit.

9. An indoor unit of an air conditioner according to claim 3, The second non-combustible material is formed of a metal material. Air conditioner indoor unit.

10. An indoor unit of an air conditioner according to claim 1, The first non-combustible material is at least one of a conductive material and an insulating material, The first fire spread prevention member is formed of at least one of the conductive material and the insulating material, The first fire spread prevention member made of the insulating material is provided on the first main surface, The first fire spread prevention member made of the conductive material is provided on the second main surface. Air conditioner indoor unit.

11. An indoor unit of an air conditioner according to claim 2, The first fire spread prevention member is made of an insulating material. Air conditioner indoor unit.

12. An indoor unit of an air conditioner according to claim 1 or 2, The first fire spread prevention member is provided on the second side portion adjacent to the seam portion on at least one of the inside and the outside of the electrical equipment box. Air conditioner indoor unit.

13. An indoor unit of an air conditioner according to claim 12, The first non-combustible material is at least one of a conductive material and an insulating material, The first fire spread prevention member is formed of at least one of the conductive material and the insulating material, The second side portion is provided with the first fire spread prevention member made of the insulating material on the inside of the electrical equipment box, and the first fire spread prevention member made of the conductive material on the outside of the electrical equipment box. Air conditioner indoor unit.

14. An indoor unit of an air conditioner according to claim 6, The first fire spread prevention member is provided on the second side portion adjacent to the seam portion on an outer side of the electrical equipment box, The second fire spread prevention member and the first fire spread prevention member are arranged along the second side portion. Air conditioner indoor unit.

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