JP4623314B2 - Embedded ceiling air conditioner - Google Patents

Description

  The present invention relates to a ceiling-embedded air conditioner in which an indoor unit is embedded in a ceiling. More specifically, the present invention relates to a ceiling-mounted air conditioner that can accurately measure room temperature while preventing a user from directly touching an electrical component. Related to type air conditioner.

  The ceiling-embedded air conditioner is often used in commercial stores and offices because the indoor unit body is embedded in the ceiling and only the decorative panel is exposed to the ceiling surface. .

  In general, an air suction port is provided in the center of the decorative panel for taking in indoor air into the air conditioning mechanism in the indoor unit body, and is adjusted in the indoor unit body so as to surround the air suction port. Normally, two or four air outlets for sending warm air into the room are provided.

  For example, as shown in Patent Document 1, a turbo fan is disposed in the center of an indoor unit main body, a heat exchanger is disposed so as to surround the turbo fan, and a bell mouth is disposed with respect to the turbo fan. It is provided coaxially.

  By the way, this kind of ceiling-embedded air conditioner is provided with a temperature sensor for measuring the room temperature for control. In Patent Document 1, the temperature sensor is housed in a sensor housing unit formed integrally with an electrical component box installed beside the bell mouth, and the temperature in the housing unit is measured.

  Further, in Patent Document 2, as another aspect, a temperature sensor is drawn to the front side of the bell mouth from the electrical component part installed on the back side of the bell mouth (anti-decorative panel side) through a hole provided in the bell mouth. Measuring temperature.

  However, each of the above prior arts has the following problems. That is, in the method described in Patent Document 1, since the storage unit for the temperature sensor is adjacent to the electrical component box, the flow of air is disturbed by the electrical component box, and accurate temperature measurement is difficult.

  Moreover, although the method of patent document 2 can measure a more exact room temperature by pulling out a temperature sensor to the front side of a bellmouth, since a temperature sensor is pulled out from a drawer hole, an operation process increases. Furthermore, since air is sucked into the fan through the lead-out hole, it may cause turbulence and noise.

  Moreover, since the temperature sensor of patent document 2 is exposed on the surface of a bellmouth, a user can touch it directly with a hand. This is in violation of the CE mark, which is one of the European safety standards, that “all electrical parts including electrical parts must not be touched by hand”, so the CE mark cannot be obtained.

JP 2001-280650 A JP 2001-208370 A

  SUMMARY OF THE INVENTION In order to solve the above-described problems, the present invention provides a ceiling-embedded air conditioner capable of measuring an accurate room temperature while preventing a user from directly touching a temperature sensor.

To solve the problems described above, the invention described in 請 Motomeko 1 includes a unit body which is embedded in the ceiling, within the unit body, the turbo fan is disposed in the center, the periphery of the turbofan with heat exchanger is disposed so as to surround the bell mice against the turbofan is provided coaxially to the upper Symbol bellmouth, the sensor holding portion for holding a temperature sensor for room temperature measuring There are formed integrally, the said sensor holding portion, the ceiling embedded air conditioner that has a protective cover for protecting the temperature sensor is attached, the sensor holding portion, the bell mouth The protective cover is provided with an air inflow port for taking air into the sensor holding part on the surface, and the length of the protective cover is the center. Is formed longer than the length of the holding portion, between the tip and the sensor holding part of the protective cover is characterized in that the air gap as an air outlet is provided.

The invention according to claim 2, Oite to the claim 1, a portion of the protective cover has lead hole is provided for withdrawing the sensor cable of the temperature sensor, the outer peripheral portion of the bell mouth A part of is provided with a notch for drawing the sensor cable out of the bell mouth.

According to the onset bright, integrally a sensor accommodating portion for accommodating the temperature sensor in a portion of the bell mouth, by which obscure the sensor housing unit with a protective cover, the temperature of the air flowing through the bell mouth Not only can be measured accurately, but also can conform to the CE mark standard.

Further, by forming toward the center of the sensor holding portion from an outer periphery of the bell mouth, without disturbing the flow of air smoothly it can incorporate air into the sensor holder, to perform a more accurate room temperature measurement Can do.

Also, by making the length of the protective cover longer than the length of the sensor holding part, a gap is created between the tip of the protective cover and the sensor holding part, and the air that has entered the sensor holding part from this gap can be comfortably I can escape.

According to the second aspect of the present invention, the sensor cable lead-out hole is provided in a part of the protective cover, and a part of the outer periphery of the bell mouth is cut away, so that the bell mouth can be easily opened. In addition, the sensor cable can be routed.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a ceiling-embedded air conditioner according to an embodiment of the present invention, and FIG. In the present invention, since the outdoor unit is not a constituent feature, description thereof is omitted.

  As shown in FIG. 1, this ceiling-embedded air conditioner (indoor unit) 1 has a unit main body 2 embedded in a ceiling (not shown). A heat exchanger 4, a drain pan 5 and a bell mouth 6 are accommodated. A decorative panel 7 that covers the lower surface of the unit body 2 is attached to the lower surface of the unit body 2.

  The unit main body 2 includes an outer frame 2 a made of a metal plate press-molded into a box shape, and an inner frame 2 b arranged along the inner peripheral surface of the outer frame 2. The outer frame 2a is formed in a box shape in which only the lower surface is opened, and an inner frame 2b made of a heat insulating material of foamed resin is bonded to the inner side surface thereof. In the present invention, the unit body 2 can be arbitrarily changed according to the specifications.

  The turbo fan 3 is a centrifugal fan that is rotationally driven by a drive motor 3a that is controlled by a control means (not shown). In this example, as shown in FIG. It has a twin fan structure connected in the axial direction. In this example, the turbo fan 3 employs a twin fan structure, but in the present invention, the specific structural requirements of the turbo fan 3 are arbitrary.

  The heat exchanger 4 is connected to a refrigeration cycle mechanism of an outdoor unit (not shown), and is disposed so as to surround the turbo fan 3. In this example, the heat exchanger 2 is formed in a square shape. In the present invention, the shape of the heat exchanger 3 can be arbitrarily changed according to specifications.

  A drain pan 5 is disposed under the heat exchanger 4. The drain pan 5 is made of a frame formed in a square shape along the shape of the heat exchanger 4, and in this example, is made of a synthetic resin molded product. As shown in FIG. 2, the drain pan 5 is formed with a groove 51 having a U-shaped cross section for receiving drain water generated by the heat exchanger 4.

  In the center of the drain pan 5, an opening 52 for attaching the bell mouth 6 is provided. In the four corners of the drain pan 5, four air guide holes 53 for guiding the air heat-exchanged by the heat exchanger 4 to the air outlet 72 are provided in this example.

  In the present invention, the specific shape and material of the drain pan are arbitrary, and can be arbitrarily changed according to the specifications. The drain pan 5 is provided with a drain pump (not shown) for discharging the drain water accumulated in the groove 51, and the drain water is drained to the outside through the drain pump.

  Next, the bell mouth 6 is made of a synthetic resin molded product, and is attached along the opening 52 of the drain pan 5. 2 and 3 together, the bell mouth 6 is formed in a mortar shape in which the opening 61 gradually narrows from the outside toward the center, and its tip (upper end in FIG. 1) has a turbo It is plugged in toward fan 3.

  The bell mouth 6 is provided with a sensor housing portion 62 for housing the temperature sensor 10 (see FIG. 5) for measuring the room temperature. The sensor storage portion 62 is formed of a concave portion formed in a groove shape from the outer periphery of the corner of the bell mouth 6 toward the center, and accordingly, the back side of the bell mouth 6 protrudes in a convex shape.

  According to this, since the sensor accommodating part 62 is formed along the radial direction, air can be smoothly taken into the sensor accommodating part 62 along the flow of air, and more accurate temperature measurement is performed. Can do.

  The sensor housing 62 is provided with two locking claws 63, 63 for holding the sensor cable 11 of the temperature sensor 10 at the front and rear in this example. A locking groove 64 is provided at the center of the locking claws 63, 63, and the temperature sensor 10 provided at the tip floats in the sensor housing portion 62 by the sensor cable 11 being sandwiched between the locking grooves 64. (See FIG. 5). According to this, since the temperature sensor 10 can be held without providing an extraction hole on the air guide surface of the bell mouth 6, occurrence of turbulent flow and noise can be suppressed.

  A protective cover 20 for covering the temperature sensor 10 is attached to the sensor storage portion 62. Referring to FIG. 4 and FIG. 5 together, the protective cover 20 is made of a synthetic resin molded product, and is formed hollow so that the inside covers the temperature sensor 10.

  On the outer peripheral surface of the protective cover 20, grilles 21 are formed in a lattice shape as an air inflow port for drawing a part of the air taken into the bell mouth 6 into the protective cover 20. On one side surface of the protective cover 20 (the lower surface in FIG. 4A), a lead-out hole 22 for pulling out the sensor cable 11 of the temperature sensor 10 is provided.

  According to this, since the user cannot directly touch the temperature sensor 10 by covering the temperature sensor 10 with the protective cover 20, a product compliant with the CE mark standard can be obtained.

  The protective cover 20 is formed such that its entire length is longer than the entire length of the sensor storage portion 62. According to this, the air gap 30 having a predetermined width is formed between the tip of the protective cover 20 and the sensor storage portion 62, so that the air that has passed through the temperature sensor 10 has the air gap 30 as an air outlet. Since the air is smoothly discharged outside, new air can always be applied to the temperature sensor 10.

  Furthermore, since the flow velocity of the air passing through the protective cover 10 and the flow velocity of the air flowing through the bell mouth 6 are almost the same, the air can flow more smoothly without causing turbulence.

The rear end of the protective cover 20 (the left end in FIG. 4 (a)) is provided with screw holes 23 for attaching the protective cover 20 in the sensor container 62. The screw holes 23 are screwed to the drain pan 5 together with the screw holes 65 formed in the sensor housing portion 62 among the four screw holes 65 formed at the four corners of the bell mouth 6.

  A part of the outer peripheral surface of the bell mouth 6 adjacent to the sensor housing portion 62 is provided with a notch portion 66 for drawing the sensor cable 11 drawn from the sensor housing portion 62 through the lead hole 22 to the outside of the bell mouth 6. It has been. According to this, the sensor cable 11 can be pulled out of the bell mouth 6 without providing a through hole in the bell mouth 6.

  The sensor cable 11 drawn out from the notch 66 is guided into a connector cover (not shown) formed along the outer periphery of the bell mouth 6 and then pulled out from an electrical component box (not shown) in the connector cover. Connected to.

  Referring to FIGS. 1 and 2 again, the decorative panel 7 is made of a synthetic resin molded product, and is attached so as to close the lower end surface of the unit main body 2. The decorative panel 7 is formed in a substantially rectangular shape, and an air suction port 71 for taking air into the unit is formed in the center.

  The air intake port 71 is entirely covered with a grid-like grille, and an air filter 73 is attached to the inside. The decorative panel 7 is provided with four air outlets 72 in this example so as to surround the four sides of the air inlet 71.

  As shown in FIG. 2, each air outlet 72 is provided with a wind direction plate 8 for changing the air blowing direction. In addition, the shape of each wind direction board 8 is the same. The wind direction plate 8 is made of a synthetic resin molded product having a cross section formed in a bow shape, and has a length for closing the air outlet 72. The wind direction plate 8 is supported on the back surface of the decorative panel 7 so as to be rotatable about a predetermined rotation drive shaft, and is rotated via a drive means (not shown).

  In this example, four air outlets 72 are provided so as to surround the air inlet 71, but the air outlets 72 may be two and can be arbitrarily changed according to specifications. Further, in this example, the turbo fan 3 is arranged at one place in the center of the unit main body 2, but the bell mouth 6 of the present invention is attached to the ceiling embedded type air conditioner having the two turbo fans 3. You may apply.

1 is an exploded perspective view of a ceiling-embedded air conditioner according to an embodiment of the present invention. The principal part sectional view of the ceiling embedded type air conditioner concerning one embodiment of the present invention. The perspective view of the bellmouth of the said ceiling-embedded air conditioner. (A) Front view of protective cover, (b) Side view of protective cover. The fragmentary sectional view of the state which attached the protective cover to the sensor accommodating part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceiling embedded type air conditioner 2 Unit main body 3 Turbo fan 4 Heat exchanger 5 Drain pan 6 Bell mouth 61 Opening part 62 Sensor accommodating part 63 Locking claw 64 Locking groove 65 Screwing hole 66 Notch part 7 Cosmetic panel 71 Air Air inlet 72 Air outlet 8 Air direction plate 10 Temperature sensor 11 Sensor cable 20 Protective cover 21 Grill 22 Lead-out hole 23 Screw hole

Claims (2)

A unit main body embedded in the ceiling, and in the unit main body, a turbo fan is disposed in the center, a heat exchanger is disposed so as to surround the turbo fan, and the turbo fan bellmouth is provided coaxially to the upper Symbol bellmouth is formed integrally with the sensor holding portion for holding a temperature sensor for room temperature measurements, the said sensor holding portion, the temperature in the ceiling embedded air conditioner protective cover for protecting the sensor that is attached,
The sensor holding part comprises a recess formed from the outer peripheral part of the bell mouth toward the inner peripheral part side, and the protective cover includes an air inlet for taking air into the sensor holding part on the surface, its is formed longer than the length of the sensor holding portion length, between the tip and the sensor holding part of the protective cover, wherein the air gap as an air outlet is provided Embedded ceiling air conditioner. A part of the protective cover is provided with a lead-out hole for pulling out the sensor cable of the temperature sensor, and a part of the outer periphery of the bell mouth is for pulling the sensor cable out of the bell mouth. The ceiling-embedded air conditioner according to claim 1, wherein a notch portion is provided.

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