JP2014016131A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which secures safety of an electric component unit and has good maintainability.SOLUTION: An electric component unit provided to an indoor unit (not illustrated) includes an electric component box 7 which houses a printed board 1a arranged laterally long on a front upper side of a heat exchanger (not illustrated) and formed by mounting various electrical components, and the electric component box 7 comprises a resin case 7b and a resin cover 7a, and is characterized in that while the resin case 7b is covered with a base substrate 1b, the resin cover 7a is covered with a metal cover 7c, the printed board 1a and base substrate 1b are short-circuited, and a screw fixing part 53 is provided to a side wall of the metal cover 7c so as to join together and short-circuit the metal cover 7c and base substrate 1b with a screw 7d. Consequently, burning in a spreading fire is prevented by the double constitution of the resin case 7b and metal cover 7c, a user is prevented from getting an electric shock when touching the electronic component box 7, and the maintainability of the electronic component unit can be improved.

Description

  The present invention relates to an air conditioner.

  Many of the conventional indoor units of this type of air conditioner have many electrical components boxes with narrow width and height dimensions in the space on the side of the heat exchanger and blower fan in the main body. Some of the electrical component boxes are downsized by arranging printed circuit boards on which various electrical components are mounted in a vertically placed state (see, for example, Patent Document 1).

  In addition, an elongated electrical component box is disposed on the front side of the water tray located at the lower part of the heat exchanger at the upper part of the outlet of the indoor unit. There is a fan that increases air-conditioning efficiency by increasing the fan arrangement space (see, for example, Patent Document 2).

JP 2008-82687 A JP 2001-65916 A

  However, in the configuration of the conventional air conditioner in which the electrical component box is arranged on the side surface side of the main body as described in Patent Document 1, the space of the portion cannot be used, so the width of the outlet of the ventilation path It was not possible to improve the right and left wind direction performance.

  Moreover, in the structure of the conventional air conditioner which has arrange | positioned the elongate electrical component box in the lower front surface of a water receiving tray as described in the said patent document 2, the design consideration with respect to the penetration | invasion of the water to the inside of an electrical component box is indispensable. In addition, because it is a place where wind does not flow, deliberation of the printed circuit board stored inside the electrical component box and design considerations for the internal temperature of the electrical component box (Patent Document 2 provides a heat dissipation hole in the cover of the electrical component box In the unlikely event that a printed circuit board ignites, it is difficult to achieve both suffocation and prevention of intrusion of condensed water and dust into the printed circuit board.

  The present invention has been made in view of the above-described problems of the prior art, and improves air conditioning efficiency and wind direction performance, reduces temperature rise inside the electrical component box, and suffocates in the event of ignition from a printed circuit board. While preventing both digestion and similar firing, even when a metal sheet metal is used as the cover of the electrical component box as a non-combustible material, the user is prevented from touching the electrical component box to ensure electric safety. Another object of the present invention is to provide an air conditioner that improves the maintainability of electrical component units such as repair and replacement of printed circuit boards.

In order to solve the above-described conventional problems, an air conditioner of the present invention includes an electrical component unit, a heat exchanger, a ventilation path, a fan, and an indoor unit having an air outlet, and the electrical component unit includes: It is arranged in a horizontally long state on the front upper side of the heat exchanger, and includes an electrical component box that houses a printed circuit board on which various electrical components are mounted, and the electrical component box includes a resin case and a resin cover, The resin cover is covered with a metal case, the resin cover is covered with a metal cover, the printed circuit board and the metal case are short-circuited, and a screw fixing portion is provided on a side wall of the metal cover. And the metal case are joined and short-circuited with screws, and the electrical component unit is placed in a horizontally long state on the upper front side of the heat exchanger. Therefore, compared to conventional indoor units, The effective width of the mouth can be expanded, air conditioning efficiency and wind direction performance can be improved, and the electrical component box is positioned higher than the water tray, eliminating the effects of water ingress, etc. Because it is a flowing place, it is easy to prevent the printed circuit board from being exposed to dew, and since heat dissipation is high, no heat dissipation holes are required in the electrical component box, and dust and water can enter the interior of the electrical component box. In addition to preventing the electrical component box from being double-structured with the resin case and the metal cover, a structure that prevents suffocation and burning is possible. Furthermore, in order to prevent the user's electric shock, by providing a joint that short-circuits the metal case and the metal cover on the side wall of the metal cover and screw-fixed, it prevents electric shock when the user touches the electrical component box, The maintainability of the electrical component unit such as repair and replacement of the printed circuit board can be improved.

  The air conditioner of the present invention improves the air conditioning efficiency and the wind direction performance, as well as reducing the temperature rise inside the electrical component box and preventing suffocation digestion and similar firing in the event of fire from a printed circuit board, and as an incombustible material Even when the metal sheet metal is configured as the cover of the electrical component box, it is possible to prevent an electric shock due to the user touching the electrical component box and to improve the maintainability of the electrical component unit.

Side view during operation of indoor unit of air conditioner according to Embodiment 1 of the present invention Front view of the indoor unit Sectional view of the indoor unit (AA section in FIG. 2) Front side perspective view of the electrical component unit of the indoor unit Rear perspective view of the electrical component unit Wind speed distribution map of the indoor unit Exploded perspective view of the electrical component box of the indoor unit Figure of the electrical component box cover of the electrical component unit opened Sectional view of the same electrical component unit (DD cross section in FIG. 8) Diagram of the indoor unit being installed indoors and maintaining the electrical component unit Sectional view of the indoor unit (BB cross section in FIG. 2) Sectional view of the same electrical component unit (cross-section CC in FIG. 4) Diagram showing the interior of the electrical component unit

1st invention is equipped with the indoor unit which has an electrical component unit, a heat exchanger, a ventilation path, a fan, and a blower outlet, and the said electrical component unit is a horizontally long state in the front upper part side of the said heat exchanger The electrical component box is configured by a resin case and a resin cover, and the resin case is covered with a metal case, and the resin Cover the cover with a metal cover, short-circuit the printed circuit board and the metal case, and further provide a screw fixing portion on the side wall of the metal cover, and short-circuit the metal cover and the metal case by screws. Because the electrical component unit is placed in a horizontally long state on the upper front side of the heat exchanger, the effective width of the heat exchanger and outlet can be expanded compared to conventional indoor units, and air conditioning In addition to improving the efficiency and wind direction performance, the electrical component box is placed at a higher position than the water tray, eliminating the effects of water intrusion and the like. Easy design and high heat dissipation eliminates the need for heat dissipation holes in the electrical component box, prevents dust and water from entering the electrical component box, and covers the electrical component box with a resin case and metal cover. Because of the double structure, a structure that prevents suffocation and calcination is possible. Furthermore, in order to prevent the user's electric shock, by providing a joint that short-circuits the metal case and the metal cover on the side wall of the metal cover and screw-fixed, it prevents electric shock when the user touches the electrical component box, The maintainability of the electrical component unit such as repair and replacement of the printed circuit board can be improved.

  In the second invention, in particular, the angle of the screw fixing portion provided on the side wall of the metal cover of the first invention is set so that the screw can be mounted in a substantially horizontal state when viewed from the front of the indoor unit. During maintenance of the product unit, screws can be easily attached and removed from the front of the indoor unit.

  In the third invention, in particular, the first or second resin cover and metal cover can be opened and closed downward in the electrical component box, and the indoor unit is installed close to the ceiling of the room. However, when opening and closing the cover of the electrical component box during maintenance of the electrical component unit, there is no problem that the cover hits the ceiling and the operation can be easily performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a side view of the air conditioner indoor unit according to Embodiment 1 of the present invention during operation, FIG. 2 is a front view of the indoor unit, and FIG. 3 is a sectional view of the indoor unit (in FIG. 2). 4 is a front perspective view of the electrical component unit of the indoor unit, FIG. 5 is a rear perspective view of the electrical component unit, and FIG. 6 is a wind speed distribution in the ventilation path of the indoor unit. 7 is an exploded perspective view of the electrical component box of the indoor unit, FIG. 8 is a view in which the cover of the electrical component box of the electrical component unit is opened, and FIG. 9 is a sectional view of the electrical component unit (FIG. 10 is a diagram showing a state in which the indoor unit is installed indoors and maintaining the electrical component unit, and FIG. 11 is a sectional view of the indoor unit (BB cross section in FIG. 2). 12 is a cross-sectional view of the same electrical component unit (cross-section CC in FIG. 4), and FIG. 13 is a diagram showing the interior of the same electrical component unit. A.

  1-3, the air conditioner in this Embodiment is comprised by the outdoor unit (not shown) and the indoor unit 40 mutually connected by refrigerant | coolant piping (not shown), The main body 2 and a movable front panel 4 (hereinafter referred to as “front panel 4”) that can freely open and close the front opening 2a of the main body 2 are provided. When the operation of the air conditioner is stopped, the front panel 4 is While the front opening 2a is closed in close contact with the main body 2, the front panel 4 moves in a direction away from the main body 2 to open the front opening 2a when the air conditioner is in operation. FIG. 3 shows a state in which the front panel 4 closes the front opening 2a.

  Further, inside the main body 2, there are a heat exchanger 6, a fan 8 for exchanging the indoor air taken in from the front opening 2 a and the top opening 2 b with the heat exchanger 6 and blowing it into the room, Opening and closing the outlet 10 for blowing the exchanged air into the room and changing the air blowing direction up and down, the vertical wind direction deflecting blades 12 (hereinafter referred to as “upper and lower blades 12”), and the left and right changing the air blowing direction to the left and right Wind direction deflecting blades 14 (hereinafter referred to as “left and right blades 14”) are provided.

  The upper and lower blades 12 are a lower blade 18 that opens and closes the air outlet 10, and an upper blade that is provided above the lower blade 18 and controls the blowing direction of air blown from the air outlet 10 in cooperation with the lower blade 18. The lower blade 18 is connected to a drive shaft (not shown), while the upper blade 20 is connected to a drive shaft (not shown), and each drive shaft (not shown) is a drive motor. Or the like (not shown).

When the air conditioner starts operation, the upper and lower blades 12 rotate to open the air outlet 10, and the fan 8 is driven, so that the room air passes through the front opening 2 a and the upper opening 2 b. Through the interior of the indoor unit 40. The taken indoor air is heat-exchanged by the heat exchanger 6, passes through the fan 8, passes through the ventilation path 28 formed on the downstream side of the fan 8, and is blown out from the outlet 10.

  Further, a filter 16 is provided between the front opening 2a and the upper surface opening 2b and the heat exchanger 6 for removing dust contained in the room air taken from the front opening 2a and the upper surface opening 2b. The filter 16 is attached to the filter frame 3a. A display unit 41 is provided on the lower front side of the filter 16 and on the upper side of the air outlet 10.

  The configuration of the electrical component unit 1 arranged in the upper front portion inside the main body 2 of the indoor unit 40 configured as described above will be described.

  As shown in FIGS. 2, 4, and 5, the electrical component unit 1 is provided with a base substrate 1b made of a reinforced metal case so as to be arranged horizontally over almost the entire width inside the main body 2. The base substrate 1b An electrical component box 7 is provided on the upper right half side, a drive device 42b for opening and closing the front panel 4 is provided on the left side, a forced operation switch 44 is provided on the left end, and the electrical component box 7 Between the driving device 42b, an opening 1c for effectively utilizing the front opening 2a and the upper opening 2b (shown in FIG. 1) during operation is provided in the base substrate 1b. A left resin case 31 and a left resin cover 30 that form an opening 1c are provided between the electrical component box 7 and the driving device 42b to cover the base substrate 1b.

  As shown in FIG. 1, the internal structure of the main body 2 is formed so that the upper part of the front surface of the heat exchanger 6 forms an inclined surface 6 a having a certain inclination angle, and further surrounds the heat exchanger 6. The provided filter 16 forms an inclined surface 16 a having the same inclination angle as the inclined surface 6 a of the heat exchanger 6, and the electrical component unit 1 has the same inclination angle with respect to the inclined surface 16 a of the filter 16. It is placed horizontally while holding it.

  With such an arrangement, the heat exchanger 6 and the width of the ventilation path 28 inside the main body 2 and the width of the outlet 10 can be widely arranged.

  Further, by disposing the electrical component unit 1 above the position of the center 8a of the fan 8 in the ventilation passage 28, the electrical component unit 1 is disposed in a slow region of the wind speed distribution diagram shown in FIG. 6, and the adverse effect on the wind performance is reduced. (Here, wind speed distribution is the flow of wind speed represented by an arrow, the speed of the wind speed is represented by the length of the arrow, and the direction of the wind speed is represented by the angle of the arrow. is there).

  Moreover, since the electrical component box 7 is disposed at a position higher than the water tray 9 for draining the dew condensation water of the heat exchanger 6, the configuration prevents the dew condensation water from entering the interior of the electrical component box 7. It has become. Furthermore, since the electrical component unit 1 is arranged at a position separated by 20 mm or more from the inclined surface 16a of the filter 16, air can be passed to the back side of the electrical component unit 1, and the electrical component It is possible to prevent dew condensation on the box 7 and to reduce the temperature rise inside the electrical component box 7, thereby eliminating the need for heat dissipation holes in the electrical component box 7 and preventing the entry of dust and water. Can do.

  Next, a fixed configuration of the electrical component unit 1 will be described. As shown in FIG. 3, a fan 8, a heat exchanger 6, and an automatic filter cleaning unit 3 are directly fixed to a frame 5 that is a base of the main body 2 of the indoor unit 40. The electrical component unit 1 is fixed to a filter frame 3a that forms the skeleton of the automatic filter cleaning unit 3, and a hook 1d on the right side of both ends of the electrical component unit 1 and a claw 1e on the left side (shown in FIG. 5). And is configured to be locked and fixed on both sides of the filter frame 3a. As shown in FIG. 2, a terminal unit 43 is fixed to the right end of the electrical component unit 1 by a claw, and the terminal unit 43 is fixed to the automatic filter cleaning unit 3 by screws.

  Next, the configuration of the electrical component box 7 will be described. As shown in FIG. 7, the printed circuit board 1a is supported by claws (not shown) and ribs (not shown) formed on the resin case 7b with the solder side facing the resin case 7b, and various electric parts are mounted. The mounted component surface side is configured to be covered with a resin cover 7a.

  8 and 9, the resin case 7b and the resin cover 7a are engaged with each other by a rotation support portion 55 provided with a shaft hole 55a, and the resin cover 7a is provided with a shaft 55b. Opening and closing operation is performed with 55 as a rotation axis. In this way, by configuring the resin cover 7a to open and close downward, as shown in FIG. 10, even when the main body 2 is installed close to the ceiling 61 on the wall 60 of the room, the electrical component When the resin cover 7a of the electrical component box 7 is opened or closed for maintenance of the unit 1 or the like, the resin cover 7a can be easily operated without interfering with the ceiling 61.

  In addition, as shown in FIG. 12, the electrical component box 7 has a resin case 7b and a resin cover 7a fitted with a portion where the side walls overlap each other, thereby making the printed circuit board 1a sealed, The outer wall of the resin cover 7a is covered with a metal cover 7c. As shown in FIG. 7, the electrical component box 7 is mounted on the base substrate 1b, and the printed circuit board 1a is fixed to the base substrate 1b with screws 7d and electrically short-circuited.

  Further, a screw fixing portion 53 is provided on the side wall of the metal cover 7c to fix the screw to the base substrate 1b and to electrically short-circuit the metal cover 7c. With such a configuration, the metal cover 7c and the base substrate 1b are not charged with a high voltage charge, and even when the user touches the electrical component box 7, there is no electric shock. Further, in the configuration as described above, even if an electrical component ignites, the resin case 7b and the resin cover 7a, the base substrate 1b and the metal cover 7c prevent suffocation and burning. In this case, it is more preferable to use a flame retardant resin for the resin case 7b and the resin cover 7a.

  Further, as shown in FIG. 11, the screw fixing portion 53 is configured so that the axis of the screw 7 d is substantially horizontal (indicated by a two-dot chain line in the figure) when the electrical component unit 1 is mounted on the main body 2. The receiving surface angle of 7d is set. With this structure, when attaching and removing the screws 7d with maintenance of the electrical component box 7, etc., it becomes possible to work while keeping the driver substantially horizontal from the front of the main body 2, and maintenance is easy. Is something that can be done.

  Here, the configuration of the electrical component unit 1 will be additionally described. As shown in FIG. 13, the electrical component unit 1 is provided with a passage 50 that connects the left and right ends of the electrical component unit 1 in a substantially straight line along the printed circuit board 1a. Is connected to the passage 50.

  The right half of the passage 50 is formed by the resin case 7b and covered with the resin cover 7a, and the left half is formed by the left resin case 31 and covered by the left resin cover 30. Further, the left and right ends of the passage 50 are open without wall surfaces on both sides, and the harness 52 can be routed into the electrical component unit 1 from either the left or right as required. With such a configuration, it is possible to improve the degree of design freedom with respect to the arrangement of various electrical components to be installed in the main body 2 and to reduce the cost of the harness 52. Further, a plurality of presser ribs 51 are provided in the passage 50 to hold the harness 52 and prevent the lift. With such a configuration, since the harness 52 can be routed in an orderly manner, the entanglement of the harness 52 and the biting into the resin case 7b and the resin cover 7a can be reduced.

As described above, in the present embodiment, by arranging the electrical component unit 1 in the horizontally long state on the front upper portion of the heat exchanger 6, the effective width of the heat exchanger 6 and the outlet 10 can be expanded. Air conditioning efficiency and wind direction performance are improved. In addition, since the electrical component box 7 is disposed at a position higher than the water tray 9, the influence of water intrusion and the like is eliminated, and the design for preventing dew condensation on the printed circuit board 1 a is facilitated because the suction air flows therethrough Since the heat dissipation property is high, the heat dissipation hole of the electrical component box 7 is not necessary, so that the entry of dust or the like into the electrical component box 7 can be prevented. Furthermore, it is possible to have a structure that prevents suffocation and calcination by the resin cover 7a, the resin case 7b, the metal cover 7c, and the metal base substrate 1b.

  In addition, by short-circuiting the metal cover 7c and the base substrate 1b of the electrical component unit 1 and also short-circuiting the printed circuit board 1a, it is possible to prevent an electric shock when the user touches the electrical component unit 1. The resin cover 7a can be opened and closed downward, and the screw fixing portion 53, which is a joint point between the metal cover 7c and the base substrate 1b, is provided on the side wall of the metal cover 7c and set at a predetermined angle. Even when the main body 2 is installed on the wall 60 of the room in the vicinity of the ceiling 61, it is possible to attach and remove screws from the front of the main body 2 without worrying that the resin cover 7a interferes with the ceiling 61. Therefore, maintenance of the electrical component unit 1 can be easily performed.

  Furthermore, the electrical component unit 1 is provided with a passage 50 that connects the left and right ends thereof in a substantially straight line to house the harness 52, and a plurality of presser ribs 51 are provided in the passage 50 to hold the harness 52 and lift up. To prevent. Thereby, since the harness 52 can be routed orderly, the entanglement of the harness 52 and the biting into the resin case 7b / resin cover 7a can be reduced, and the assemblability and maintainability of the electrical component unit can be improved.

  The air conditioner according to the present invention increases the effective width of the heat exchanger and the air outlet by disposing the electrical component unit on the front upper portion in the main body, and improves the air conditioning efficiency and the wind direction performance. It is useful for various air conditioners including air conditioners used in general households.

1 Electrical component unit 1a Printed circuit board 1b Base circuit board (metal case)
1c Opening 1d Hook 1e Claw 2 Main Body 2a Front Opening 2b Top Opening 3 Filter Automatic Cleaning Unit 3a Filter Frame 4 Movable Front Panel (Front Panel)
5 Base frame 6 Heat exchanger 6a Inclined surface 7 Electrical component box 7a Resin cover 7b Resin case 7c Metal cover 7d Screw 8 Fan 8a Center 9 Water pan 10 Outlet 12 Vertical wind direction deflecting blade (upper and lower blades)
14 Left and right wind direction deflection blades (left and right blades)
16 Filter 16a Inclined surface 18 Lower blade 20 Upper blade 28 Ventilation path 30 Left resin cover 31 Left resin case 40 Indoor unit 41 Display unit 42b Drive device 43 Terminal unit 44 Forced operation switch 50 Passage 51 Holding rib 52 Harness 53 Screw fixing portion 55 Rotation support part 55a Shaft hole 55b Shaft 60 Wall 61 Ceiling

Claims (3)

An electrical component unit, a heat exchanger, a ventilation path, a fan, and an indoor unit having an air outlet are provided, and the electrical component unit is disposed in a horizontally long state on the front upper side of the heat exchanger, An electrical component box that accommodates a printed circuit board on which components are mounted is provided. The electrical component box includes a resin case and a resin cover. The resin case is covered with a metal case, and the resin cover is covered with a metal cover. The printed circuit board and the metal case are short-circuited, and further, a screw fixing portion is provided on a side wall of the metal cover, and the metal cover and the metal case are joined by a screw to be short-circuited. Air conditioner to do. The air conditioner according to claim 1, wherein the angle of the screw fixing portion provided on the side wall of the metal cover is set so that the screw is attached in a substantially horizontal state when viewed from the front of the indoor unit. The air conditioner according to claim 1 or 2, wherein the resin cover and the metal cover can be opened and closed downward in the electrical component box.

Images