JP4821515B2 - Air conditioner - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an air conditioner, and more specifically, it prevents dew condensation of a blowout vent of a drain pan constituting a part of a blowout passage of a ceiling-embedded air conditioner and reduces ventilation resistance. The present invention relates to an apparatus capable of improving the air blowing efficiency in the blowout passage.

  2. Description of the Related Art Conventionally, there is known a four-way blowout type ceiling-embedded air conditioner having a suction port in the center of a decorative panel of a casing embedded in a ceiling in a room and having four blowout ports so as to surround the suction port. It has been.

  In this type of ceiling-embedded air conditioner, a decorative panel attached to the indoor ceiling surface is attached to the lower side of the main body casing to form a casing. A suction port is provided in the center of the decorative panel of the casing, and four air outlets are provided in four directions surrounding the suction port.

  One fan and a fan motor having a bell mouth are provided inside the main body casing so as to face the suction port. Around the fan, a heat exchanger and a drain pan that receives dew condensation water of the air that exchanges heat with the heat exchanger are provided. A suction grill is provided at the suction port of the decorative panel, and a filter is attached to the inside of the suction grill.

  The drain pan is provided with a suction passage in the center, and serves as a passage for taking in air from the suction port of the decorative panel. In addition, air outlets communicating with the four air outlets of the decorative panel are provided so as to surround the suction passage, and air that has been heat-exchanged from the air outlet to the room can be blown. Yes.

  The above-described ceiling-embedded air conditioner has a large indoor space against the background of housing. For this reason, it is required to secure a larger amount of blown air and increase the capacity of the heat exchanger. ing. However, for example, to increase the capacity of the heat exchanger, it is possible to enlarge the main casing and the drain pan, but this leads to an increase in the size of the ceiling-embedded air conditioner.

  On the other hand, in order to increase the capacity of the heat exchanger without increasing the main body casing and the drain pan, it is possible to reduce the opening area of the outlet vent of the drain pan, but this leads to a decrease in the amount of blown air. . Therefore, it is required to enlarge the opening area of the drain pan by enlarging the outlet of the drain pan in the longitudinal direction. Under such circumstances, the following techniques are known regarding the structure of the blowout vent of the drain pan.

  As an improvement of the structure of the blowout vent provided in the drain pan of this ceiling-embedded air conditioner, there is one that prevents dew condensation in the vicinity of the blowout vent (see, for example, Patent Document 1). As shown in FIG. 6, the drain pan 950 closes the space between the heat exchanger 910 and the decorative panel 920, and is provided with an air outlet 960 that is a part of the air outlet passage connected to the air outlet 930. The drain pan 950 has an air outlet of the decorative panel 920 from the upper end on the heat exchanger 910 side of the air outlet 960 of the drain pan 950 so that the cross-sectional area of the air outlet 960 gradually decreases from the upstream end toward the air outlet 930. A curved surface 970 is formed on the bank portion 950 a that reaches 930.

  As a result, when the air heat-exchanged in the heat exchanger 910 is blown into the room through the blowout vent 960 and the blowout port 930, the heat-exchanged air smoothly flows along the curved surface 970. The peeling of the wind from the wall surface of the ventilation port 960 can be prevented, and condensation on the air outlet 930 side can be prevented.

  In addition, as an improvement of the structure of the blowout vent provided in the drain pan of this ceiling-embedded air conditioner, there is one in which the blowout area of the blowout vent is increased in the longitudinal direction (for example, see Patent Document 2). .) As shown in FIG. 7, the housing 20 has an octagonal prism shape composed of four corners (short sides) 60 and four sides (long sides) 70, and an opening 80 is formed in the lower part thereof. . A fan 90, a heat exchanger 100, a refrigerant pipe 110 connected to the heat exchanger 100, a drain pump 120, a drain hose 130 connected to the drain pump 120, and a corner 60 are attached to the inside of the housing 20 and the corner 60. A heat insulating material 500 attached to the mounted fixture 140 and the housing 20 is provided.

  A drain pan 180 that also functions as a heat insulating member made of foamed polystyrene is disposed in the opening 80 of the housing 20. The drain pan 180 is provided with a suction port 190 provided at the center of the drain pan 180 and four discharge openings 200 (blowing vents) provided around the suction port 190. Each opening 200 is provided with a partition portion 700, and the opening 200 is partitioned at the center and partitioned into a first opening 200a and a second opening 200b.

  Also, the drain pan 180 is formed with a drain receiving portion 210 and two grooves 220 that connect the short sides of the drain pan 180. A temporary fastener 300 made of iron is attached to the fixtures 240 and 250 that fix the drain pan 180 to the housing 200.

As shown in FIG. 8, the partition portion 700 that partitions the opening 200 extends through the opening 200, a part 700a projects outside the opening 200, and the projecting member 800 is integrated with the part projecting part 700a. Is formed. Thereby, the intensity | strength of the surrounding part of the opening 200 can be maintained.
Japanese Patent Laid-Open No. 10-253089 (pages 2 to 3, FIG. 1) Japanese Patent No. 9-229400 (pages 2 to 3, FIG. 2, FIG. 8 and FIG. 9)

  However, since the ceiling-embedded air conditioner of Patent Document 1 has a curved surface 970 formed on the bank portion 950a of the outlet vent 960 of the drain pan 950, it can prevent condensation on the outlet 930 side. There is a tendency that the blown air tends to flow outside the blowout vent, and a space where the blowout air does not flow is formed inside the blowout vent, so that sufficient condensation cannot be prevented.

  In addition, since the ceiling-embedded air conditioner of Patent Document 2 has the partition 700 formed in the center of the discharge opening 200 of the drain pan 180, the strength around the discharge opening 200 of the drain pan 180 can be maintained. However, there is a problem in that the partition portion 700 becomes ventilation resistance and lowers the blowing efficiency in the blowing passage.

  In view of the above-mentioned problems, the present invention prevents the dew of the blowout vent of the drain pan that constitutes a part of the blowout passage of the ceiling-embedded air conditioner, and reduces the ventilation resistance and blows air in the blowout passage. It aims at providing the air conditioner which enabled it to improve efficiency.

In order to solve the above-mentioned problems, the present invention is characterized in that a housing having a lower surface, a heat exchanger, a blower and a drain pan provided in the housing, and a central portion facing the drain pan. In an air conditioner having a suction port, a blower outlet around the suction port, and a decorative panel that closes the opening of the housing,
When the drain pan is provided with a blowout vent that communicates with the blowout outlet, the outer side of the blowout vent is formed longer than the inner side , and when a refrigerant pipe or a drain pump is disposed at a corner of the drain pan, Of the sides of the blowout vent, the side facing the refrigerant pipe and the drain pump is expanded toward the blowout port.

According to the first aspect of the present invention, the outer side of the blowout vent of the drain pan is formed longer than the inner side. For this reason, the space where the blown air does not flow inside the blowout vent can be reduced, and the exposure of the blowout vent of the drain pan can be prevented.
In addition, the side of the blowout air vent facing the refrigerant pipe and the drain pump is expanded toward the blowout port. For this reason, it is possible to suppress a decrease in the opening area of the blowout vent due to the arrangement of the refrigerant pipe and the drain pump, and to smooth the flow of the wind introduced from the blowout vent to the blowout port.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings. FIG. 1 is an exploded perspective view showing a configuration of a ceiling-embedded air conditioner according to the present invention, FIG. 2 is a cross-sectional view showing a configuration of a ceiling-embedded air conditioner according to the present invention, and FIG. 3 shows a drain pan according to the present invention. FIG. 4 is a rear view showing a drain pan according to the present invention, FIG. 5 is a diagram showing a cross section of a part of the drain pan of FIG. 4, (A) is a cross-sectional view along AA ′, and (B) is BB ′. It is sectional drawing.

  As shown in FIGS. 1 and 2, the ceiling-embedded air conditioner according to the present invention includes a housing 1 having an open bottom surface, a heat exchanger 6, a blower 5, and a drain pan 7 provided inside the housing 1. Further, a suction port 10a is provided in the center facing the drain pan 7, a blower port 10b is provided around the suction port 10a, and a decorative panel 10 that closes the opening of the housing 1 is provided.

  In the present invention, the drain bun 7 is provided with an air outlet 7a communicating with the air outlet 10b, and the outer side of the air outlet 7a is formed longer than the inner side. Further, in the present invention, the drain pan 7 is provided with a support column 7c for reinforcement at the center of the blowout vent 7a communicating with the blowout port 10b, and the shape of the blade in the direction in which the blown air flows through the column 7c. It is characterized by that.

  The configuration of the present invention will be specifically described below with reference to FIGS. The casing 1 is composed of a top wall 1a which is square in plan view but lacks four corners to form an octagon, and side walls 1b which are integrally provided along each side of the top wall 1a. The lower surface of the body 1 is open.

  Further, the housing 1 is suspended and fixed to the ceiling back 2 by a suspension means (not shown), and the opening on the lower surface of the housing 1 faces the opening 3 a provided in the ceiling plate 3. Furthermore, the heat insulating material 4 is attached to the housing 1 in close contact with the inner surfaces of part of the upper surface wall 1a and the side wall 1b.

  A fan motor 5m constituting the blower 5 is attached to the inner surface of the central portion of the upper surface wall 1a of the housing 1. The axial direction of the fan motor 5m is oriented in the vertical direction, and a fan 5f is attached to a rotating shaft 5a protruding downward. When the fan 5f is rotationally driven by a fan motor 5m, the fan 5f sucks air from the lower side in the axial direction and has a blowing action to blow out in the circumferential direction.

  Furthermore, the heat exchanger 6 is arrange | positioned centering on the air blower 5 so that the circumference | surroundings may be enclosed. The heat exchanger 6 has a substantially square shape in a plan view, and is disposed at a position for receiving wind blown from the fan 5f of the blower 5. The heat exchanger 6 is connected to a compressor, an outdoor heat exchanger, and the like disposed in an outdoor unit (not shown) via a refrigerant pipe 6a so as to constitute a refrigeration cycle.

  Further, the heat exchanger 6 is placed on a receiving portion of a drain pan 7 fitted into the opening at the lower end of the housing 1 via a heat insulating material 4, and between the drain pan 7 and the upper surface wall 1 a of the housing 1. It is supported via a heat insulating material 4. That is, the upper end surface of the heat exchanger 6 is in close contact with the upper surface wall 1 a of the housing 1 via the heat insulating material 4, and the lower end surface of the heat exchanger 6 is in close contact with the drain pan 7.

  And the drain pan 7 is formed with four blow-out vents 7a inside the four sides, and is formed with a suction opening 8 to which the bell mouth 9 is attached at the center. Further, a reinforcing support column 7c is formed at the center of the blowout vent 7a. Further, the drain pan 7 has a square shape in plan view, but has corners 7b formed so as to form an octagonal shape by removing the four corners, so that the drain pan 7 can be formed by the upper surface wall 1a and the side wall 1b. ing. The drain pan 7 is fitted into the side wall 1 b of the housing 1 via a heat insulating material 4. The drain pan 7 is blown from the fan 5 f of the blower 5 and is heat-exchanged by the heat exchanger 6. Air is introduced.

  The bell mouth 9 has a circular suction base 9a formed at the upper end, an opening 9b corresponding to the suction opening 8 of the drain van 7 formed at the lower end, and an inclined surface that gradually expands from the suction base 9a to the opening 9b. Have. The suction base portion 9 a of the bell mouth 9 is disposed so as to face a position close to the fan 5 f of the blower 5.

  The decorative panel 10 is substantially square in plan view, and closes the opening at the lower end of the housing 1. The decorative panel 10 is located at a position exposed from the ceiling plate 3 to the room R, and is provided with a substantially square suction port 10a at the center, and four rectangular air outlets 10b open at the periphery. Further, the suction port 10a of the decorative panel 10 is provided to face the opening 9b of the bell mouth 9, and the filter 12 and the suction grill 11 are attached to the suction port 10a in the vicinity of the bell mouth 9 in this order. Yes.

  According to the ceiling-embedded air conditioner configured as described above, the indoor air sucked from the suction port 10a of the decorative panel 10 by the action of the blower 5 is introduced into the opening 9b of the bell mouth 9 as the primary side air. In addition, it is guided from the inclined surface of the bell mouth 9 toward the suction base 9 a and is introduced into the fan 5 f of the blower 5.

  On the other hand, the air outlet 10b of the decorative panel 10 is provided so as to communicate with the air outlet 7a of the drain pan 7 so that air exchanged by the heat exchanger 6 can be used as secondary air. It is introduced into the air outlet 10b through the air outlet 10b and blown out into the room R from the air outlet 10b.

  Next, the drain pan 7 disposed so as to be adjacent to the decorative panel 10 will be specifically described with reference to FIGS. 3 to 5. As shown in FIGS. 3 and 4, the drain pan 7 is mainly composed of a heat insulating member such as foamed polystyrene having a substantially octagonal shape in plan view along the inner surface of the side wall 1 b of the housing 1. The drain pan 7 has a suction opening 8, four blowout vents 7 a, and a condensed water receiving groove 7 i, and the suction opening 8 is formed of a substantially square opening formed in the center in plan view. Each of the four blowout vents 7a is formed of a horizontally long quadrilateral opening formed along the inner surface of the side wall 1b of the housing 1. Furthermore, a reinforcing column 7c for reinforcing the periphery of the blowout vent 7a is integrally formed at the center of the blowout vent 7a.

  The condensed water receiving groove 7g is mainly formed between the suction opening 8 and the four outlets 7a. As shown in FIG. 5 (A), the lower end of the heat exchanger 6 can be inserted into a substantially U-shape. It is a substantially annular groove in shape and in plan view. The condensed water receiving groove 7g is formed so as to communicate with the main groove 7ga at the corner 7b and the main groove 7ga formed so as to surround the suction opening 8 into which the lower end of the heat exchanger 6 is inserted in a plan view. The drain pump arrangement groove 7gb and the corner groove 7gc formed so as to communicate with the drain pump arrangement groove 7gb through the main groove portion 7ga. A drain pump (not shown) for draining the condensed water accumulated in the condensed water receiving groove 7g to the outside of the housing 1 is disposed in the drain pump arranging groove 7gb. In the upper space of the corner groove 7gc, the refrigerant pipe 6a of the heat exchanger 6 is arranged.

  When the drain pan 7 is molded by foaming styrene resin in a mold, the ceiling hanging attachment 7d disposed at the corner 7b and the bell mouth disposed at the peripheral edge of the suction opening 8 A drain drain pipe 7f formed in the 9 mounting bracket 7e and the drain pump arrangement groove 7gb is integrally formed.

  Next, the blowout vent 7a of the drain pan 7 which is the feature of the present invention described so far will be described in detail. As shown in FIGS. 3 and 4, the three outlets 7 a other than the outlet 7 a formed between the drain pump arrangement groove 7 gb and the corner groove 7 gc are communicated with the outlet 10 b of the decorative panel 10. The outer side is formed longer than the inner side. The length of the outer side of these outlets 7a is a length that matches the length in the longitudinal direction of the outlet 10b, and the length of the inner side is shorter than this.

  In other words, both sides or one side of these air vents 7a are formed in a trapezoidal shape extending from the inner side edge of the blower air vent 7a to the outer side edge toward the corner 7b of the drain pan 7. is doing. It should be noted that only one side of the outlet vent 7a is formed with the drain pump arrangement groove 7gb and the corner groove 7gc, and requires a space for arranging the drain pump and the refrigerant pipe 6a. This is because it cannot be extended to the end of the outer side toward the corner 7b of the drain pan 7.

  In this way, the drain pan 7 is provided with the blowout vent 7a communicating with the blowout port 10b, and the outer side of the blowout vent 7a is formed longer than the inner side, so that the blown air is blown inside the blowout vent 7a. The space that does not flow can be reduced, and the blowout vent 7a of the drain pan 7 can be prevented from being exposed.

  Moreover, as shown in FIG.3 and FIG.5 (B), the blower ventilation port 7a formed between the drain pump arrangement | positioning groove | channel 7gb and the corner groove 7gc, and the two blower ventilation ports 7a adjacent to this blower ventilation port 7a. Is formed in a tapered shape so that both sides or one side of the blowout air vent 7a expand toward the blowout port 10b of the decorative panel 10. The length in the longitudinal direction of the open end surface of the blowout air vent 7a corresponds to the length in the longitudinal direction of the blowout port 10b. In the same manner as described above, only the outlet vent 7a expands toward the outlet 10b because the drain pump arrangement groove 7gb and the corner groove 7gc are formed, and the drain pump And a space for disposing the refrigerant pipe 6a. In the direction inside the drain pan 7 on the side opposite to the air outlet 10b, the opening area of the air outlet 7a is set to the length in the longitudinal direction of the air outlet 10b. This is because it cannot be secured by matching.

  Thus, when arrange | positioning the refrigerant | coolant piping 6a and a drain pump in the corner | angular part 7b of the drain pan 7, the edge which opposes the refrigerant | coolant piping 6a and a drain pump among the edge | sides of the blowing vent 7a is made into the blower outlet of the decorative panel 10 By expanding toward 10b, the reduction of the opening area of the blowout vent 7a due to the arrangement of the refrigerant pipe 6a and the drain pump is suppressed, and the flow of blown air introduced from the blowout vent 7a toward the blowout port 10b is reduced. It can be smooth.

  Furthermore, as shown in FIG. 5 (B), with respect to the reinforcing support column 7c integrally formed at the center of the outlet vent 7a, the direction in which the blown air flows toward the outlet 10b through the column 7c. It is molded into the shape of a wing. Specifically, the shape of this wing is such that the front edge portion of the support column portion 7c is circular and gradually becomes thinner from the middle toward the rear edge portion. As a result, even when a reinforcing column 7c is provided in the center of the blowout vent 7a communicating with the blowout port 10b in the drain pan 7, the column 7c has a wing shape. The ventilation resistance by the provided support | pillar part 7c can be reduced, and the ventilation efficiency in the blowing path from the blowing vent 7a to the blower outlet 10b of the decorative panel 10 can be improved.

It is a disassembled perspective view which shows the structure of the ceiling embedded type air conditioner by this invention. It is sectional drawing which shows the structure of the ceiling-embedded air conditioner by this invention. It is a front view which shows the drain pan by this invention. It is a reverse view which shows the drain pan by this invention. FIG. 5A is a cross-sectional view taken along line A-A ′ and FIG. 5B is a cross-sectional view taken along line B-B ′. It is principal part sectional drawing which shows the structure of the conventional ceiling embedded type air conditioner. It is a disassembled perspective view which shows the structure of the other conventional ceiling-embedded air conditioner. It is a figure which shows the partition part provided in the opening of the drain pan of FIG. 7, and a tension member, (A) is sectional drawing, (B) is a perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 1a Upper surface wall 1b Side wall 2 Ceiling back 3 Ceiling board 3a Opening part 4 Heat insulating material 5 Blower 5a Rotating shaft 5f Fan 5m Fan motor 6 Heat exchanger 6a Refrigerant piping 7 Drain pan 7a Outlet vent 7b Corner part 7c Strut part 7d Mounting bracket 7e Mounting bracket 7f Drain drain pipe 7g Condensation water receiving groove 7ga Main groove portion 7gb Drain pump arrangement groove 7gc Corner groove 8 Suction opening 9 Bell mouth 9a Suction base 9b Opening portion 10 Cosmetic panel 10a Suction port 10b Suction grill 11 12 Filter R Indoor

Claims (1)

A housing that opens the lower surface, a heat exchanger provided in the housing, a blower, and a drain pan, have a suction port in the center facing the drain pan, and have a blower outlet around the suction port, In an air conditioner equipped with a decorative panel that closes the opening of the housing,
The drain pan is provided with an outlet vent that communicates with the outlet, and the outer side of the outlet vent is formed longer than the inner side , and when a refrigerant pipe or a drain pump is disposed at a corner of the drain pan. The air conditioner is characterized in that, among the sides of the blowout vent, a side facing the refrigerant pipe and the drain pump is expanded toward the blowout port.

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