JP6413870B2 - Embedded ceiling air conditioner - Google Patents

Description

  The present invention relates to a ceiling-embedded air conditioner that is installed by being embedded in an indoor ceiling.

  The ceiling-embedded air conditioner is generally configured as shown in FIGS. 5 to 7 (for example, Patent Document 1). Reference numeral 10 denotes a substantially rectangular parallelepiped housing made of sheet metal, the upper surface of which is closed by a top plate 11, the side surface of which is closed by a side plate 12, and the lower surface is opened. In this case 10, a heat insulating material 20 is attached to the inner wall, and a hook 30 attached to the outside of the corner portion 12a of the side plate 12 is suspended from a ceiling beam or the like by a hanging metal fitting.

  A motor 40 is attached to the center of the rear surface of the top plate 11 of the housing 10, and a turbo fan 50 as a sending device is coupled to an output shaft 41 of the motor 40. Reference numeral 60 denotes a heat exchanger having a square cylindrical shape as viewed from the lower surface. Reference numeral 70 denotes a drain pan made of foamed resin, which collects condensed water generated in the heat exchanger 60 in the collecting groove 74. An opening 74 is formed in the central portion of the drain pan 70 by forming an inner peripheral edge 71.

  Reference numeral 80 denotes a decorative panel in which an air suction port 81 is provided in the central portion and air outlets 82 are provided at four locations around the air suction port 81. Reference numeral 90 denotes a bell mouth that guides the air sucked from the air suction port 81 of the decorative panel 80 to the turbo fan 50, and is incorporated so that the shoulder portion 91 is pressed against the lower surface of the inner peripheral edge 71 of the drain pan 70.

  Reference numeral 100 denotes an air blowing guide that guides the air that has passed through the heat exchanger 60 to the air outlet 82, and 110 denotes a dust removal filter that is disposed inside the air inlet 81 of the decorative panel 80. An electrical component box 120 controls the motor 40, the wind direction valve 260, and the like, and is incorporated between the lower surface of the drain pan 70 and the upper surface of the decorative panel 80. 130 is an indoor ceiling board in which a ceiling-embedded air conditioner is arranged.

  In such a ceiling-embedded air conditioner, EMI (Electromagnetic Inrerference: electromagnetic) is connected to a cable connecting the electrical component box 120 and the motor 40 in order to prevent noise from being generated by the rotation operation of the motor 40. It is required to install a filter.

  The EMI filter is preferably housed in the electrical component box 120. However, when the size of the electrical component box 120 is limited due to the size limitation of the ceiling-embedded air conditioner, the electrical component box 120 has an EMI filter. Space cannot be secured and cannot be stored there.

JP 2008-064394 A

  Therefore, this EMI filter must be disposed at a place other than the electrical component box 120. However, if the EMI filter is disposed in the air passage from the air inlet 81 to the air outlet 82 via the heat exchanger 60, the EMI filter is disposed. The filter becomes a blowing resistance, which may cause deterioration of the performance of the air conditioner or the generation of abnormal noise.

  An object of the present invention is to provide a ceiling-embedded air conditioner in which an EMI filter can be stored on the lower surface of a drain pan so that problems such as generation of abnormal noise do not occur.

In order to achieve the above object, the invention according to claim 1 is characterized in that an upper surface is closed by a top plate, a side surface is closed by a side plate, and a lower surface is opened, and an air suction port is provided in the center. A decorative panel provided with an air outlet around and attached to the lower surface of the housing, a motor attached to the top plate of the housing, a blower driven to rotate by the motor, and the air suction port Heat exchange that exchanges heat between the bell mouth that guides the sucked air to the blower and the refrigerant that is being sucked from the air suction port by the blower and blown out to the air outlet. wherein the vessels, and a drain pan for collecting the condensed water generated in the heat exchanger, and the electrical component box for controlling various electrical components including the motor, the ceiling embedded air conditioner having a said electrical component box Together with the cable connecting the chromatography data is routed along the lower surface of the drain pan, a portion of the lower surface of the drain pan, filter housing recess EMI filter mounted across the cable is accommodated is formed, On the lower surface of the drain pan, there are a first cable pressing groove into which one drawing portion of the cable is fitted and a second cable pressing groove into which the other drawing portion of the cable is fitted so as to be continuous with the filter housing recess. Each is formed .

  The invention according to claim 2 is the ceiling-embedded air conditioner according to claim 1, wherein a part of the lower surface of the drain pan is a lower surface of the inner peripheral edge of the drain pan.

  The invention according to claim 3 is the ceiling-embedded air conditioner according to claim 1 or 2, wherein the EMI filter housed in the filter housing recess of the drain pan is pressed by the bell mouth. And

  According to a fourth aspect of the present invention, in the ceiling-embedded air conditioner according to the first, second, or third aspect, the EMI filter is fitted into the filter housing recess together with a gap sealing material. .

  The invention according to claim 5 is the ceiling-embedded air conditioner according to claim 2, 3 or 4, wherein a cable guide groove is formed in the vertical direction of the inner peripheral wall of the inner peripheral edge of the drain pan, and the cable The portion between the EMI filter and the motor is fitted in the cable guide groove.

  In the present invention, the EMI filter mounted in the middle of the cable connecting the electrical component box and the motor is housed in a filter housing recess formed in a part of the lower surface of the drain pan. The position of the filter housing recess is out of the air passage, and there is no possibility that the EMI filter acts as an air blowing resistor and deteriorates the performance of the air conditioner or generates abnormal noise. In addition, by pressing the bell mouth against the EMI filter from the bottom surface or fitting the EMI filter into the filter housing recess together with the gap seal material, it is possible to prevent the EMI filter from rattling, and the generation of abnormal noise is more effective. Can be prevented. Furthermore, the cable can be prevented from generating blowing resistance and abnormal noise by fitting it into the cable guide groove.

It is the perspective view which turned up the lower surface of the ceiling embedded type air conditioner of the state which removed the decorative panel, the bell mouth, and the electrical component box in order to represent the periphery of the EMI filter attachment part of this invention. FIG. 2 is an enlarged explanatory view around the EMI filter mounting portion in FIG. 1. (A) is a bottom view of the inner periphery of the drain pan to which the EMI filter and cable of the present invention are attached, and (b) is a bottom view of the inner periphery of the drain pan from which the EMI filter and cable of the present invention are removed. It is the bottom view which removed the decorative panel of the ceiling embedded type air conditioner which showed the installation position of the EMI filter of this invention. It is the perspective view seen from the lower surface of the conventional ceiling-embedded air conditioner. It is the bottom view which removed the decorative panel of the conventional ceiling-embedded air conditioner. It is the VII-VII sectional view taken on the line of FIG.

  1 to 4 show a wiring portion of a cable 210 that connects the electrical component box 120 and the motor 40 of the ceiling-embedded air conditioner according to the embodiment of the present invention. An opening 74 inside the drain pan 70 made of foamed resin is formed by an inner peripheral edge 71, and in the vicinity of the electrical component box 120 on the lower surface 71 a of the inner peripheral edge 71 (however, in FIG. 1 to FIG. 120 is removed), a filter housing recess 72 is formed. In the inner peripheral wall 71 b of the inner peripheral edge 71, a cable guide groove 73 formed by cutting away from the vertical direction on the side far from the electrical component box 120 in the filter housing recess 72, that is, the side close to the motor 40. Is provided.

  As shown in FIG. 3B, a cable pressing groove 72 a is formed on the lower surface 71 a of the inner peripheral edge 71 of the drain pan 70 on the electrical component box 120 side in the filter housing recess 72, and the cable guide groove 73 side is formed. The lower surface 71 a of the cable is continuous with a cable pressing groove 72 b that is continuous with the cable guide groove 73.

  Reference numeral 220 denotes an EMI filter, which is attached with the cable 210 interposed therebetween, and is fitted in the filter housing recess 72 together with a gap sealant 250 such as a heat insulating sheet. In a state where the EMI filter 220 is fitted in the filter housing recess 72, the lead portion 211 of the cable 210 extending from the EMI filter 220 in the direction of the electrical component box 120 is fitted in the cable pressing groove 72a, and from the EMI filter 220 to the motor. The lead-out portion 212 extending in the direction of 40 is fitted into the cable pressing groove 72b.

  The lead-out portion 212 of the cable 210 further extends upward (downward in FIGS. 1 and 2) after being fitted into the cable guide groove 73. 1 and 2, the lead-out portion 212 of the cable 210 is folded downward (in the direction of the decorative plate 80) on the upper surface 71c of the inner peripheral edge 71 of the drain pan 70, and further upward (toward the ceiling). Folded in the direction of the plate 11).

  That is, the lead portion 212 of the cable 210 extending in the direction of the motor 40 is folded twice in opposite directions to form a trap portion 213, and the side from the trap portion 213 toward the motor 40 is the heat exchanger 60. Extends to the upper cable fixture 240 along the inner vicinity.

  The folded portion 213 a on the motor 40 side of the trap portion 213 of the cable 210 is locked to a locking tool 71 d provided on the upper surface 71 c of the inner peripheral edge portion 71 of the drain pan 70 by the clamp 230.

  The cable fixture 240 includes a horizontal plate 241 that is screwed to the top plate 11 of the housing 10 and a vertical plate 242 that extends downward from the side facing the inside of the heat exchanger 60 of the horizontal plate 241. The side view is L-shaped. A cable guide groove 241a for guiding the cable 210 is formed on the upper surface of the horizontal plate 241, and a cable guide groove 242a for guiding the cable 210 is also formed on the outer side of the vertical plate 242 (the side facing the heat exchanger 60). Yes.

  As described above, the EMI filter 220 is housed together with the gap sealant 250 in the filter housing recess 72 on the lower surface 71 a of the inner peripheral edge 71 of the drain pan 70. Then, by incorporating the bell mouth 90, the shoulder portion 91 (see FIG. 7) formed in the circumferential direction of the upper surface of the bell mouth 90 is pressed against the lower surface 71a of the inner peripheral edge portion 71 of the drain pan 70. The EMI filter 220 is also pressed in the same manner. For this reason, backlash does not occur in the EMI filter 220, and it is possible to prevent abnormal noise during operation.

  Further, the lead portion 212 of the cable 210 from the mounting portion of the EMI filter 220 toward the motor 40 is fitted into the cable guide groove 73 formed in the inner peripheral wall 71b of the inner peripheral edge portion 71 of the drain pan 70. The drawer 212 is prevented from generating vibrations due to blowing, so that no abnormal noise is generated and blowing resistance is not generated.

  Further, the lead-out portion 212 of the cable 210 from the cable guide groove 73 toward the motor 40 has a trap portion 213 held by the clamp 230 at a portion located on the upper surface 71 c of the inner peripheral edge portion 71 of the drain pan 70. For this reason, the dew condensation water that has flowed along the cable 210 from the cable fixture 240 side can flow in that direction because the direction from the folded portion 213a of the trap portion 213 toward the EMI filter 220 is upward. Instead, it falls into the collecting groove 74 (see FIG. 7) of the drain pan 70 and accumulates. Therefore, it is prevented that the condensed water detours around the drain pan 70 and falls downward, that is, falls into the room.

  Further, since the cable 210 in the immediate vicinity of the motor 40 is pressed along the back surface of the top plate 11 by the cable fixture 240, the cable 210 does not wobble and the fixing is ensured, and the turbo fan 50 is rotated. It is not affected by the vibration of the. In addition, it is not necessary to use a large number of clips when attaching the cable 210 on the back surface of the top plate 11, and the work becomes easy.

10: Housing, 11: Top plate, 12: Side plate 20: Thermal insulation material 30: Hook 40: Motor, 41: Output shaft 50: Turbo fan 60: Heat exchanger 70: Drain pan, 71: Inner peripheral edge, 71a: Lower surface 71b: inner peripheral wall, 71c: upper surface, 71d: locking tool, 72: filter housing recess, 72a, 72b: cable pressing groove, 73: cable guide groove, 74: opening 80: decorative panel, 81: air inlet 82: Air outlet 90: Bell mouth 91: Shoulder part 100: Air guide 110: Filter 120: Electrical component box 130: Indoor ceiling board 210: Cable, 211, 212: Drawer part, 213: Trap part, 213a: Folded portion 220: EMI filter 230: Clamp 240: Cable fixing tool, 241: Horizontal plate, 241a: Cable guide groove, 242: Vertical plate, 242 a: Cable guide groove 250: Gap seal material 260: Wind direction valve

Claims (5)

A case where the upper surface is closed by the top plate, the side surface is closed by the side plate, and the lower surface is opened, and an air inlet is provided in the center, and an air outlet is provided around the air inlet and is attached to the lower surface of the case A decorative panel, a motor attached to the top plate of the housing, a blower that is rotationally driven by the motor, a bell mouth that guides the air sucked from the air suction port to the blower, and the blower A heat exchanger that exchanges heat with the refrigerant for the air that is sucked from the air suction port and blown out to the air blowout port by a device, and a drain pan that collects dew condensation water generated in the heat exchanger; In the ceiling-embedded air conditioner equipped with an electrical component box for controlling various electrical components including the motor,
With cable for connecting the said electrical component box motor is wired along the lower surface of the drain pan, a portion of the lower surface of the drain pan, the filter containing the EMI filter mounted across the cable is accommodated A recess is formed,
On the lower surface of the drain pan, there are a first cable pressing groove into which one drawing portion of the cable is fitted and a second cable pressing groove into which the other drawing portion of the cable is fitted so as to be continuous with the filter housing recess. Each formed,
Embedded ceiling air conditioner characterized by that.
The ceiling-embedded air conditioner according to claim 1,
A part of the lower surface of the drain pan is a lower surface of the inner peripheral edge of the drain pan. The ceiling-embedded air conditioner according to claim 1 or 2,
The ceiling-embedded air conditioner, wherein the EMI filter housed in the filter housing recess of the drain pan is pressed by the bell mouth. In the ceiling-embedded air conditioner according to claim 1, 2, or 3,
The ceiling-embedded air conditioner, wherein the EMI filter is fitted together with a gap seal material in the filter housing recess. The ceiling-embedded air conditioner according to claim 2, 3 or 4,
A cable guide groove is formed in the vertical direction of the inner peripheral wall of the inner peripheral edge of the drain pan, and a portion of the cable between the EMI filter and the motor is fitted in the cable guide groove. Embedded ceiling air conditioner.

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