Outdoor machine

Abstract

To provide an outdoor machine comprising an electric component box capable of efficiently cooling a board, and components supported by the board.SOLUTION: An outdoor machine according to the present disclosure comprises an air blowing chamber, a machine chamber, and an electric component box. A board is provided in the electric component box. The electric component box comprises an air intake port formed in a lower surface of the electric component box, and an air exhaust port formed in one side surface of the electric component box. The air intake port comprises a first air intake port located on the side of the one side surface, and a second air intake port located on the side of the other side surface. The depth of the second air intake port is formed so as to be longer than the depth of the first air intake port.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to an outdoor unit. [Background technology]

[0002] Patent Document 1 discloses a technology for an outdoor unit that includes an outdoor unit housing, a machine room, a blower, and an electrical box, in which the electrical box draws in air from outside the electrical box through an air inlet provided on the underside of the electrical box and expels air from inside the electrical box through an air outlet provided on the side of the electrical box, thereby forming an airflow path inside the electrical box and cooling circuit boards inside the electrical box. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 166237 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides an outdoor unit equipped with an electrical box that can efficiently cool a board and components supported by the board. [Means for solving the problem]

[0005] The outdoor unit of the present disclosure is an outdoor unit having an air blower chamber, a machine chamber, and an electrical box, wherein a circuit board is provided within the electrical box, and the electrical box has an air intake port formed on the underside of the electrical box and an exhaust port formed on one side surface of the electrical box, the air intake port having a first air intake port located on the one side surface and a second air intake port located on the other side surface, and the depth of the second air intake port is longer than the depth of the first inlet. [Effects of the Invention]

[0006] In the outdoor unit according to the present disclosure, the depth of the second air intake port is greater than the depth of the first air intake port. This increases the amount of intake air around the second air intake port, which is located farther from the exhaust port. This increases contact between the air and the substrate, allowing for efficient cooling of the substrate. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of an outdoor unit according to a first embodiment. [Figure 2] FIG. 1 is a perspective view of an outdoor unit with a front cover removed according to a first embodiment; [Figure 3] FIG. 1 is a perspective view of an outdoor unit according to a first embodiment, with some components removed; [Figure 4] FIG. 1 is a perspective view of an electrical box according to a first embodiment; [Figure 5] 1 is a top view of an electrical box according to a first embodiment. [Figure 6] FIG. 1 is a front view of an electrical box according to a first embodiment. [Figure 7] FIG. 1 is a perspective view of a bottom surface of an electrical box according to a first embodiment; [Figure 8] FIG. 10 is a perspective view of a bottom surface of an electrical box according to another embodiment; [Figure 9] FIG. 10 is a perspective view of a bottom surface of an electrical box according to another embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0008] (Findings that formed the basis of this disclosure) At the time the inventors arrived at the idea of ​​the present disclosure, there was a technology in which an electrical box was provided with an air inlet and an air outlet, and air was drawn in by a fan to generate an airflow, which cooled the circuit board and electronic components by contact with the airflow. However, the inventors discovered a problem with the conventional technology in that the cooling efficiency varied depending on the positions of the air inlet and air outlet, and the subject matter of the present disclosure was formed to solve this problem. Therefore, the present disclosure provides an outdoor unit equipped with an electrical box that can efficiently cool a board and components supported by the board.

[0009] Hereinafter, embodiments will be described in detail with reference to the drawings. However, in some cases, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters or redundant explanation of substantially the same configuration may be omitted. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0010] (Embodiment 1) [1-1.Configuration] [1-1-1.Outdoor unit configuration] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, arrows indicate directions in the installed state of the outdoor unit 10. The symbol UP indicates upward, the symbol FR indicates forward, and the symbol R indicates rightward. In the description, directions such as front, back, left, right, and up and down are based on the outdoor unit 10 in FIG. 1 unless otherwise specified.

[0011] Fig. 1 is a diagram showing an outdoor unit 10 according to embodiment 1. Fig. 2 is a diagram showing the outdoor unit 10 with the front cover 30 removed. Fig. 3 is a diagram showing the outdoor unit 10 with the cover 30, the frame 20, and some of the electrical components 40 removed. The outdoor unit 10 is a substantially rectangular parallelepiped housing 11. The housing 11 includes a base 12 that forms the base of the housing 11, a frame 20 that surrounds the housing 11, a cover 30 that covers the side surfaces of the housing 11, and electrical components 40 that are arranged inside the housing 11.

[0012] The base portion 12 includes base portions 13 each having a rectangular pillar shape and provided at the four corners of the lower end of the housing 11, and base connection portions 14 connecting adjacent base portions 13 to each other.

[0013] The frame 20 of the housing 11 is composed of four main frames 21 extending vertically from the top of the base connection portion 14, and sub-frames 22 connecting adjacent main frames 21. The sub-frames 22 are composed of a lower frame 23 provided at the bottom end, a middle frame 24 provided in the middle, and an upper frame 25 provided above the middle frame 24. The lower frame 23, the middle frame 24, and the upper frame 25 are all arranged substantially parallel to one another.

[0014] Covers 30 are attached to the front, right side, and rear of the housing 11. A top plate 15 is provided on the upper end of the main frame 21. The top plate 15 is formed in a lattice shape. A bottom plate 16 is disposed on the lower frame 23.

[0015] In this embodiment, the housing 11 includes an air blower chamber 50 located above the upper frame 25, using the sub-frame 22 as a guide, and a machine chamber 60 located between the upper frame 25 and the lower frame 23.

[0016] A heat exchanger (not shown) is disposed in the machine chamber 60. A blower fan 51 is disposed in the blower chamber 50 with the air blowing direction facing upward. The blower fan 51 is disposed so that the entire surface of the blower fan 51 overlaps with the top plate 15 when viewed from above.

[0017] The electrical box 100 is provided on the front side inside the housing 11. In the electrical box 100, predetermined electronic circuit boards and the like are disposed.

[0018] [1-1-2. Configuration of the electrical box] Fig. 4 is a perspective view of the electrical box 100 in embodiment 1. Fig. 5 is a front view of the electrical box 100 in embodiment 1. Fig. 6 is a top view of the electrical box 100 in embodiment 1. Fig. 7 is a perspective view of the bottom surface of the electrical box 100. The electrical box 100 is composed of an upper surface portion 101 forming the top surface, a left side surface portion 102 (one side surface portion) and a right side surface portion 103 (the other side surface portion) forming the left and right side surfaces, a rear surface portion 104 forming the rear surface, and a lower surface portion 105 forming the bottom surface. The lower surface portion 105 is formed in a U-shape with its opening facing rearward in a side view. That is, it is formed by a lower surface base portion 105a, one side surface portion 105b, and the other side surface portion 105c. The lower surface base portion 105a forms the front side of the lower part of the electrical box 100. The one side surface portion 105b forms the upper side of the lower surface portion 105, and the other side surface portion 105c forms the lower side of the lower surface portion 105.

[0019] The front ends of the left side surface portion 102 and the right side surface portion 103 are bent outward in the width direction to form guide portions 102a, 103a. A rectangular pillar-shaped board support portion 106 is provided from the middle of the left side surface portion 102 to the middle of the right side surface portion 103. The board support portion 106 is provided with a plurality of stays 107. The stays 107 support a board 110.

[0020] The rear portion 104 is provided with a plurality of stays 107 extending forward. A stay 107 provided on the rear surface portion 104 supports a substrate 111 . In this embodiment, the substrates 111 are arranged as a left substrate 111L provided on the left side surface portion 102 side, a right substrate 111R provided on the right side surface portion 103 side, and an upper substrate 111U provided on the upper left side. The substrates 110 and 111 are supported substantially horizontally with the rear surface 104 and substantially vertically with respect to the right side surface 102 and the left side surface 103 .

[0021] An air exhaust port 115 is provided in the left side surface portion 102 of the electrical box 100. The air exhaust port 115 is provided in an upper portion of the left side surface portion 102. An air intake port 120 is formed in one side surface portion 105b of the lower surface portion 105. The air intake port 120 is provided across the entire one side surface portion 105b of the lower surface portion 105. The intake port 120 and the exhaust port 115 are formed so that the sum of their opening areas is approximately the same, thereby suppressing flow resistance within the electrical box 100 and allowing air to flow efficiently within the electrical box 100.

[0022] The intake port 120 and the exhaust port 115 formed in the left side surface portion 102 and one side surface portion 105b of the bottom surface portion 105 are formed by forming minute holes by, for example, punching. In this embodiment, the intake port 120 and the exhaust port 115 are formed by a plurality of round holes. The round holes are formed so as to be uniformly aligned in the vertical and horizontal directions. By providing the minute holes in this way, it is possible to prevent the intrusion of geckos and the like into the electrical box 100.

[0023] Air intake port 120 provided in one side surface portion 105b of bottom surface portion 105 is composed of a first air intake port 121 formed on the left side surface portion 102 side where exhaust port 115 is provided, and a second air intake port 122 formed on the right side surface portion 103 side. The depth D2 of second air intake port 122 and the depth D1 of first air intake port 121 are formed so that D2 > D1. In other words, first air intake port 121 has a shorter depth than second air intake port 122.

[0024] The second air intake port 122 is formed between a center line C of the predetermined board 112, which is based on the left-right width W0, and the right side surface portion 103. In this case, the predetermined board 112 refers to a plurality of boards mounted with electronic components and heat-generating components to be cooled by air intake from the air intake port 120. In this embodiment, the predetermined board 112 includes boards 110, 111R, and 111L, and the center line C and width W0 of the board 112 are determined by the rightmost and leftmost ends of the boards 110, 111R, and 111L arranged in the electrical box 100 when viewed from the front. Therefore, in this embodiment, the positions of the center line C and width W0 are determined by the leftmost end of the board 111L and the rightmost end of the board 111R.

[0025] A heat-generating component 130 and an electronic component 131 are arranged on the substrate 112. In the present embodiment, the heat-generating component 130 is a fuse. The heat-generating component 130 is arranged above the second air intake port 122. In the present embodiment, the electronic component 131 is arranged on the front surface of the substrate 111L. The electronic component 131 is arranged so as to overlap with the first air intake port 121 in a top view.

[0026] [1-2. Operation] [1-2-1. Outdoor unit operation] The outdoor unit 10 is connected to an indoor unit (not shown) via piping and the like (not shown) to form an air conditioner. When the air conditioner starts cooling or heating operation, the outdoor unit 10 also operates. That is, when the air conditioner starts operating and the air conditioner starts cooling or heating operation, the blower fan 51 of the outdoor unit 10 operates and exhausts the air inside the outdoor unit 10. Thus, air is drawn in through an air intake provided in the outdoor unit 10 and sent to the outdoor unit 10. The air sent to the outdoor unit 10 exchanges heat with a refrigerant in a heat exchanger in a machine room 60 inside the outdoor unit 10. The air that has exchanged heat passes through the electrical box 100, is sent to the blower room 50, and is exhausted outside the outdoor unit 10.

[0027] [1-2-2. Operation of the electrical box] When the outdoor unit 10 is operated to operate the blower fan 51, the air inside the electrical box 100 is discharged from the exhaust port 115, generating an airflow that moves from the intake port 120 toward the exhaust port 115. That is, air is taken in through the first intake port 121 and the second intake port 122, passes around the outer periphery of the board 112, and generates an airflow that flows toward the exhaust port 115. The air that passes through the board 112 and flows toward the exhaust port 115 cools the board 112 and the heat-generating components 130 and electronic components 131 that are arranged on the board 112.

[0028] In this embodiment, the width W of the air intake port 120 is set to be equal to or greater than the width W0 of the substrate 112. That is, the air intake port 120 is provided across the entire one side surface portion 105b of the bottom surface portion 105. This allows the air taken in through the air intake port 120 to be blown onto the substrate 112 and the heat-generating components 130 and electronic components 131 arranged on the substrate 112. Furthermore, the depth D2 of the second air intake port 122 is longer than the depth D1 of the first air intake port 121. That is, the amount of air taken in from the second air intake port 122 is greater than the amount of air taken in from the first air intake port 121. Therefore, by arranging the heat-generating component 130, which generates more heat than the electronic component 131, above the second air intake port 122 and arranging the electronic component 131 above the first air intake port 121, air can be blown in accordance with the amount of heat generated, thereby efficiently cooling the heat-generating component 130 and the electronic component 131 arranged on the board 112. In this way, by appropriately arranging the electrical components in accordance with the amount of air taken in by the air intake port 120 and the amount of heat generated by the heat-generating component 130 and the electronic component 131, the heat-generating component 130 and the electronic component 131 on the board 112 can be efficiently cooled.

[0029] Furthermore, the air drawn in through the air inlet 120 stays in the electrical box 100 longer the farther it is from the exhaust port 115, and therefore the contact time with the circuit board 110 also increases. That is, by increasing the amount of air drawn in through the second air inlet 122, which is farther from the left side surface 102, than through the first air inlet 121, which is closer to the left side surface 102 where the exhaust port 115 is provided, the amount of air that comes into contact with the circuit board 110 can be increased. Therefore, by making the depth D2 of the second air inlet 122 longer than the depth D1 of the first air inlet 121 as in this embodiment, the air stays in the electrical box 100 longer compared to when uniform air inlets are provided, and this makes it possible to efficiently cool the circuit board 112 and the heat-generating components 130 and electronic components 131 on the circuit board 112.

[0030] [1-3. Effects, etc.] The outdoor unit 10 has an air blower chamber 50, a machine chamber 60, and an electrical box 100. A circuit board 112 is provided inside the electrical box 100. The electrical box 100 has an air intake 120 formed on the bottom surface of the electrical box 100 and an exhaust vent 115 formed on the left side surface 102 of the electrical box 100. The air intake 120 has a first air intake 121 located on the left side surface 102 side and a second air intake 122 located on the right side surface 103 side. The depth D2 of the second air intake 122 is compared to the depth D1 of the first air intake 121 and is formed so that D2 > D1. According to this, the depth D2 of second air intake port 122 provided at a position away from exhaust port 115 is long, and therefore the amount of air taken in from second air intake port 122 is large. Therefore, compared to when air intake port 120 having a uniform depth is provided, it is possible to increase the contact between the taken-in air and substrate 112, and it is possible to efficiently cool substrate 112 and heat-generating components 130 and electronic components 131 on substrate 112.

[0031] The air intake 120 is formed by a plurality of holes. According to this, by forming the air intake port as a minute hole by punching or the like, it is possible to prevent the intrusion of geckos and the like.

[0032] The width W of the air intake port 120 is compared with the width W0 of the substrate 110, and satisfies W≧W0. The second air intake port 122 is formed within a width W1 from the center line C to the right side surface portion 103 when viewed from the rightmost and leftmost ends of the substrate 110. According to this, by forming the second air intake port 122 from the center of the specified substrate 112 toward the left side surface portion 102, it is possible to increase the contact between the intake air and the substrate 112, and it is possible to efficiently cool the substrate 112 and the heat-generating components 130 and electronic components 131 on the substrate 112.

[0033] A heat-generating component 130 is disposed on the substrate 112. The heat-generating component 130 is provided above the second intake port 122. According to this, by placing the heat-generating component 130 above the second air intake 122, which has a larger intake volume than the first air intake 121, the intake air can be brought into direct contact with the heat-generating component 130, and the heat-generating component 130 can be cooled efficiently.

[0034] An electronic component 131 is disposed on the substrate 112. The electronic component 131 is disposed at a position overlapping with the first air intake port 121 in a top view. According to this, by disposing the electronic component 131 above the first air intake port 121, the drawn-in air can be brought into direct contact with the electronic component 131, and the electronic component 131 can be cooled efficiently.

[0035] (Other embodiments) As described above, the above-mentioned first embodiment has been described as an example disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. Furthermore, it is also possible to combine the components described in the above-mentioned first embodiment to create new embodiments. Therefore, other embodiments will be exemplified below.

[0036] 8 and 9 are perspective views of electrical box 200 in which the shape of air intake port 220 is changed. In the first embodiment described above, a technique has been exemplified in which air intake port 220 is provided over the entire one side surface portion 105b of underside portion 105. However, the present disclosure is not limited to this. For example, as shown in FIG. 8 , it is also possible to provide a blocking portion 223 on underside portion 105 and provide it between the left end of one side surface portion 105b and first air intake port 221, or between first air intake port 221 and second air intake port 222. Furthermore, with regard to the positioning of the air intake 220, the front ends of the first air intake 221 and the second air intake 222 may be at the same position, or the front end of the first air intake 221 may be located behind the front end of the second air intake 222, and the rear end of the first air intake 221 may be located forward of the rear end of the second air intake 222 (see Figure 9).

[0037] It should be noted that the above-described embodiments are intended to illustrate the technology of the present disclosure, and various modifications, substitutions, additions, omissions, etc. may be made within the scope of the claims or their equivalents.

[0038] (Addendum) The above description of the embodiments discloses the following techniques.

[0039] (Technology 1) An outdoor unit having an air blower chamber, a machine chamber, and an electrical box, wherein a circuit board is provided within the electrical box, and the electrical box has an air intake port formed on the underside of the electrical box and an air exhaust port formed on one side surface of the electrical box, the air intake port having a first air intake port located on the one side surface and a second air intake port located on the other side surface, and the depth of the second air intake port is formed longer than the depth of the first air intake port. In this case, the second intake port, which is located away from the exhaust port, has a long depth, so the amount of air taken in from the second intake port is large. Therefore, compared to when an intake port with a uniform depth is provided, the amount of contact between the taken-in air and the board can be increased, and the board and board components can be cooled efficiently.

[0040] (Technology 2) The outdoor unit according to Technology 1, wherein the air intake is formed by a plurality of holes. According to this, by forming minute holes by punching or the like, it is possible to prevent the intrusion of geckos and the like.

[0041] (Technology 3) An outdoor unit according to Technology 1 or 2, wherein the left-right width of the air intake is equal to or greater than the left-right width of the base plate, and the second air intake is formed between the center line of the left-right width of the base plate and the other side surface when viewed from the front. According to this, by forming the second air intake port from the center of the board to the other side surface side, it is possible to increase the contact between the intake air and the board, and it is possible to efficiently cool the board and board components.

[0042] (Technology 4) The outdoor unit according to any one of Technologies 1 to 3, wherein a heat-generating component is disposed on the board, and the heat-generating component is provided above the second air intake port. According to this, by placing the heat-generating components above the second air intake port, which has a larger intake volume than the first air intake port, the intake air can be brought into direct contact with the heat-generating components, allowing the heat-generating components to be cooled efficiently.

[0043] (Technical Aspect 5) The outdoor unit according to any one of Technical Aspects 1 to 4, wherein an electronic component is arranged on the board, and the electronic component is arranged in a position overlapping with the first air intake port in a top view. According to this, by disposing the electronic components above the first air intake port, the drawn-in air can be brought into direct contact with the electronic components, and the electronic components can be cooled efficiently. [Industrial Applicability]

[0044] As described above, the outdoor unit according to the present invention can be used as an outdoor unit for an air conditioner, etc. [Explanation of symbols]

[0045] 10 Outdoor unit 11. Housing 12 Base 13 Base 14 Base connection 15 Top plate 16 Bottom plate 20 frames 21 Mainframe 22 Subframe 23 Lower frame 24 Central Frame 25 Upper Frame 30 Cover 40 Electrical Components 50 Blow room 51 Blower fan 60 Machine room 100 Electrical box 101 Top part 102 Left side part 102a Guide part 103 Right side part 103a Guide part 104 Rear part 105 Bottom part 105a Lower base 105b One side side part 105c Other side side part 106 Substrate support 107 Stay 110 Substrate 111 Substrate 111R Right side board 111L Left side board 111U upper board 112 PCB 115 Exhaust port 120 Air Intake 121 First intake 122 Second intake 130 Heat-generating parts 131 Electronic Components 200 Electrical box 220 Air Intake 221 First intake 222 Second intake 223 Occlusion

Claims

1. In an outdoor unit having an air blower chamber, a machine chamber, and an electrical box, A circuit board is provided in the electrical box, The electrical box includes an intake port formed on a bottom surface of the electrical box and an exhaust port formed on one side surface of the electrical box, The air intake port has a first air intake port located on one side surface side and a second air intake port located on the other side surface side, The depth of the second air intake port is formed longer than the depth of the first air intake port. outdoor unit.

2. The air intake is formed by a plurality of holes. The outdoor unit according to claim 1 .

3. The left-right width of the intake port is equal to or greater than the left-right width of the substrate, The second air intake port is formed between the center line of the left-right width of the base plate and the other side surface when viewed from the front. The outdoor unit according to claim 1 .

4. a heat generating component is disposed on the substrate; The heat-generating component is provided above the second air intake port. The outdoor unit according to claim 1 .

5. Electronic components are arranged on the substrate, The electronic component is disposed at a position overlapping with the first air intake port in a top view. The outdoor unit according to claim 1 .

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