JP6689401B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner provided with a drainage port for draining drain water.

  Patent Document 1 describes a water receiver for a dehumidifier. This dehumidifier water receiver has a drainage hole and a bolt-shaped stopper attached to the drainage hole. A female screw is formed inside the drainage hole. The plug is formed with a male screw that is screwed into the female screw.

Japanese Utility Model Publication No. 50-022346

  However, the bolt-shaped plug may shrink due to aging or heat. When the stopper contracts, a gap is created between the drainage hole and the stopper, which may cause water leakage in the container.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an air conditioner that can prevent water leakage even if a water stopcock contracts.

The air conditioner according to the present invention is a drain pan that receives drain water from a heat exchanger, an inlet portion that is open to the inside of the drain pan, an outlet portion that is open to the outside of the drain pan, and the inlet portion and the outlet portion. Has a tapered inner peripheral surface that is formed between the drain portion and a larger diameter toward the outlet portion, and a drain outlet portion for draining drain water in the drain pan, and the drain outlet portion from the outlet portion side. A water stopcock that is removably inserted and that is in close contact with the inner peripheral surface, a lid that is removably attached to the outlet portion, and is disposed between the water stopcock and the lid. An urging member for urging the inlet portion side, the drain outlet portion has a first tubular portion having the outlet portion formed at one end, and the lid is closed at one end. The lid has a tubular shape, and the lid includes an inner peripheral portion of the lid and an outer peripheral portion of the first tubular portion. There are those attached to the outlet by screwing.

  According to the present invention, since the water stopcock can be brought into close contact with the inner peripheral surface of the drainage port by the urging force of the urging member, water leakage can be prevented even if the water stopcock contracts.

1 is a partial cross-sectional view showing a schematic configuration of an air conditioner according to Embodiment 1 of the present invention. It is sectional drawing which shows the structure of the drain outlet part 10 vicinity in the air conditioner which concerns on Embodiment 1 of this invention. FIG. 3 is a perspective view showing an assembled state of a lid 30 and a coil spring 40 in the air conditioner according to Embodiment 1 of the present invention. It is a figure explaining the effect in the air conditioner which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure of the drain outlet part 10 vicinity in the air conditioner which concerns on Embodiment 2 of this invention.

Embodiment 1.
The air conditioner according to Embodiment 1 of the present invention will be described. FIG. 1 is a partial cross-sectional view showing a schematic configuration of an air conditioner according to this embodiment. In the present embodiment, as the air conditioner, a ceiling-embedded indoor unit 100 that is buried behind the ceiling is illustrated. As shown in FIG. 1, the indoor unit 100 includes a housing 101 having an open lower surface, and a decorative panel 102 attached from the lower surface opening of the housing 101 to the peripheral edge of the opening of the ceiling. A fan motor 103 is attached to the top plate of the housing 101. A turbo fan 104 is fixed to the output shaft of the fan motor 103. A heat exchanger 105 is arranged around the turbofan 104 so as to surround the turbofan 104.

  A drain pan 106 that receives condensed water from the heat exchanger 105 as drain water is provided below the heat exchanger 105. A drain port 10 is provided at the bottom of the water storage section of the drain pan 106. In the present embodiment, drain port 10 and drain pan 106 are separate members, but drain port 10 may be a part of drain pan 106. A water stop plug 20 is detachably attached to the drain port 10. With the water stop plug 20 attached to the drain port 10, the drain water from the heat exchanger 105 is stored in the drain pan 106. When the stop cock 20 is removed from the drain port portion 10, the drain water stored in the drain pan 106 is drained to the outside.

  FIG. 2 is a cross-sectional view showing the configuration in the vicinity of the drain port 10 in the air conditioner according to the present embodiment. As shown in FIG. 2, the drain port portion 10 includes a cylindrical tubular portion 11 (an example of a first tubular portion) and a flange portion 12 formed in a brim shape at the upper end of the tubular portion 11. Have The drain port portion 10 is attached to the drain pan 106 by fitting the tubular portion 11 from above into an opening formed in the bottom portion of the drain pan 106 (not shown in FIG. 2). A drain port 15 is formed so as to penetrate through the inside of the tubular portion 11. At the upper end of the tubular portion 11, an inlet portion 13 that opens inside the drain pan 106 and serves as an inlet of the drain port 15 is formed. At the lower end of the tubular portion 11, an outlet portion 14 that opens to the outside of the drain pan 106 and serves as an outlet of the drain port 15 is formed. At least a part of the drain port 15 in the axial direction is defined by the inner peripheral surface 16 of the tubular portion 11. The inner peripheral surface 16 is formed in a tapered shape (that is, a conical surface shape) in which the diameter is smaller as it is closer to the inlet portion 13 and is larger as it is closer to the outlet portion 14. Further, on the outer peripheral surface of the tubular portion 11, two locking claws 17 for attaching a lid 30 described later are formed.

  The water stopper 20 is made of an elastic body such as rubber. The water stop plug 20 is detachably inserted into the drain port 15 formed in the drain port section 10 from the outlet section 14 side, and is in close contact with the inner peripheral surface 16. The water stop plug 20 is constantly subjected to an urging force in a direction in which it comes into close contact with the inner peripheral surface 16 by a coil spring 40 described later. In FIG. 2, the biasing force received by the water stopcock 20 is indicated by a thick arrow. Although the shape of the water stopcock 20 is deformed due to the close contact with the inner peripheral surface 16, FIG. 2 shows the shape of the water stopcock 20 before the deformation.

  The water stopcock 20 has a tubular portion 21 (an example of a second tubular portion), a bottom portion 22 and a hollow portion 23. The tubular portion 21 has a conical surface shape in which the diameter becomes smaller toward the upper end and becomes larger toward the lower end. The tubular portion 21 includes a tapered outer peripheral surface 24 facing the inner peripheral surface 16 of the drainage port 10. The bottom portion 22 is formed on the upper end of the tubular portion 21 on the inlet portion 13 side of the drainage outlet portion 10. The hollow portion 23 is formed inside the tubular portion 21. The upper end of the hollow portion 23 is closed by the bottom portion 22, and the lower end of the hollow portion 23 on the outlet 14 side of the drainage port 10 is open. The outer peripheral surface 24 is formed with annular convex portions 25a and 25b that are in close contact with the entire circumference of the inner peripheral surface 16. The convex portions 25 a and 25 b are crushed by the close contact with the inner peripheral surface 16 and deformed following the inner peripheral surface 16. As a result, the water stoppage of the water stopcock 20 is enhanced. A rib-shaped grip portion 26 protruding toward the hollow portion 23 is formed on the bottom portion 22. The handle 26 is used, for example, when removing the water stopcock 20 from the drain port 10.

  A lid 30 and a coil spring 40 (an example of a biasing member) are detachably attached to the drainage port 10 on the outlet 14 side.

  FIG. 3 is a perspective view showing an assembled state of the lid 30 and the coil spring 40 in the air conditioner according to the present embodiment. As shown in FIG. 3 and FIG. 2 already described, the lid 30 has a tubular shape with one end closed. That is, the lid 30 has a cylindrical tubular portion 31 and a bottom portion 32 that closes the lower end of the tubular portion 31. The lower end of the tubular portion 11 of the drain port portion 10 (that is, the end portion of the tubular portion 11 on the outlet portion 14 side) is fitted inside the tubular portion 31. The tubular portion 31 is formed with two locking holes 33 that are respectively locked by the two locking claws 17 of the drainage port 10. A pair of arcuate positioning ribs 34 and a pair of hook-shaped hook portions 35 are formed on the surface of the bottom portion 32 on the cylindrical portion 31 side. The positioning rib 34 is provided to position the coil spring 40. The hook portion 35 is provided to hook and attach the coil spring 40. The lid 30 and the coil spring 40 are integrally assembled by attaching the coil spring 40 to the hook portion 35.

  When the lid 30 is attached to the drain port portion 10, the coil spring 40 is arranged between the water stopcock 20 and the lid 30 in a compressed state. The upper end of the coil spring 40 is in contact with the water stopcock 20, and the lower end of the coil spring 40 is attached to the lid 30. That is, the reaction force of the coil spring 40 acts on both the water stopcock 20 and the lid 30. On the other hand, the lid 30 is fixed to the drain port 10 by the locking claw 17 locking the locking hole 33. Thereby, the coil spring 40 biases the water stopcock 20 toward the inlet portion 13 side of the drainage outlet portion 10. Due to the biasing force of the coil spring 40, the water stopcock 20 comes into close contact with the inner peripheral surface 16 of the drainage port 10.

  Next, a method for attaching the water stopcock 20 to the drainage port 10 will be described. First, the water stop plug 20 is inserted into the drain port 10 from the outlet 14 side. Next, the lid 30 and the coil spring 40, which are assembled in advance, are attached to the drainage port 10, and the locking claw 17 is locked in the locking hole 33. As a result, the lid 30 is fixed to the drain port portion 10, and the water blocking plug 20 is brought into close contact with the inner peripheral surface 16 of the drain port portion 10 by the biasing force of the coil spring 40.

  Next, a method of removing the water stopcock 20 from the drain port section 10 will be described. First, the engagement between the engagement claw 17 and the engagement hole 33 is released, and the lid 30 and the coil spring 40 are removed from the drain port 10. Next, by pulling the handle portion 26, the water stopcock 20 is removed from the drain port portion 10.

  FIG. 4 is a diagram for explaining the effect of the air conditioner according to the present embodiment. As shown in FIG. 4A, the inclination angle of the inner peripheral surface 16 of the drain port portion 10 is α. Further, it is assumed that the radius of the water stopcock 20 contracts by the contraction width β due to deterioration over time or heat. In FIG. 4A, the outer shape of the water stopcock 20 before contraction is indicated by a two-dot chain line. When the water stopcock 20 contracts, a gap may be formed between the water stopcock 20 and the inner peripheral surface 16 of the drain port 10. However, since the water stopper 20 is biased by the coil spring 40, the contracted water stopper 20 moves toward the inlet portion 13 side by the biasing force of the coil spring 40, as shown in FIG. 4B. The moving distance of the water stopper 20 is represented by (β / tan α) by using the inclination angle α of the inner peripheral surface 16 and the contraction width β of the water stopper 20. According to the present embodiment, even if the water stopcock 20 contracts, the waterstop cock 20 can be brought into close contact with the entire circumference of the inner peripheral surface 16 by the urging force of the coil spring 40. Water resistance is secured.

  The contraction width of the water stopper increases as the diameter of the water stopper increases if the contraction rate is constant. For this reason, conventionally, when a large-diameter drain port and a water stopcock were used, water leakage was likely to occur due to contraction of the water stopcock. On the other hand, in the present embodiment, even if the water stopcock 20 contracts, the waterproofness is ensured, so that it is possible to increase the diameters of the drain port 15 and the water stopcock 20 while preventing water leakage. . Therefore, according to the present embodiment, the diameter of the drainage port 15 and the water stopcock 20 can be increased, so that drainage performance and cleaning workability can be improved.

  As described above, the air conditioner according to the present embodiment includes the drain pan 106 that receives the drain water from the heat exchanger 105, the inlet portion 13 that is opened inside the drain pan 106, and the outlet that is opened outside the drain pan 106. A drain port for draining drain water in the drain pan 106, which has a portion 14 and a tapered inner peripheral surface 16 formed between the inlet portion 13 and the outlet portion 14 and having a larger diameter toward the outlet portion 14. Section 10, a water stopcock 20 that is detachably inserted into the drainage port section 10 from the outlet section 14 side and is in close contact with the inner peripheral surface 16, a lid 30 that is detachably attached to the outlet section 14, and a water stopcock 20. A coil spring 40 (an example of a biasing member) that is disposed between the cover 30 and the lid 30 and biases the water shutoff plug 20 toward the inlet portion 13 side.

  According to this configuration, since the water stopcock 20 can be brought into close contact with the inner peripheral surface 16 of the drain port portion 10 by the urging force of the coil spring 40, even if the water stopcock 20 contracts due to aged deterioration or heat. The waterproofness of the faucet 20 is ensured. Therefore, water leakage of the drain pan 106 can be prevented.

  In the air conditioner according to the present embodiment, the water stopcock 20 may have annular projections 25a and 25b that are in close contact with the entire circumference of the inner peripheral surface 16. According to this structure, the water stoppage of the water stopcock 20 can be improved.

  In the air conditioner according to the present embodiment, the water stopcock 20 may be made of an elastic body. According to this structure, the water stoppage of the water stopcock 20 can be improved.

  In the air conditioner according to the present embodiment, the water stopcock 20 includes a tubular portion 21 (an example of a second tubular portion) having an outer peripheral surface 24 facing the inner peripheral surface 16, and a tubular portion 21. You may have the bottom part 22 formed in the edge part at the inlet part 13 side, and the hollow part 23 formed in the inside of the cylindrical part 21, and the edge part at the exit part 14 side opened. According to this structure, an air layer can be formed in the space between the water stopcock 20 and the lid 30, so that the heat insulating property can be improved.

  In the air conditioner according to the present embodiment, the water stopcock 20 may have a handle portion 26 formed so as to project from the bottom portion 22 toward the hollow portion 23. With this configuration, workability when removing the water stopcock 20 can be improved.

  In the air conditioner according to the present embodiment, the lid 30 may have a hook portion 35 for attaching the coil spring 40. According to this configuration, since the lid 30 and the coil spring 40 can be integrated, workability when attaching and detaching the water stopcock 20 can be improved.

Embodiment 2.
An air conditioner according to Embodiment 2 of the present invention will be described. FIG. 5 is a cross-sectional view showing the configuration in the vicinity of the drain port 10 in the air conditioner according to the present embodiment. The present embodiment is different from the first embodiment in the attachment structure of the lid 30 to the drainage port 10. The constituent elements having the same functions and actions as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

  As shown in FIG. 5, a male screw 18 is formed on the outer peripheral surface of the tubular portion 11 of the drainage port 10. A female screw 36 that is screwed into the male screw 18 is formed on the inner peripheral surface of the tubular portion 31 of the lid 30. The lid 30 is detachably attached to the outlet portion 14 by screwing the male screw 18 and the female screw 36 together.

  As described above, in the air conditioner according to the present embodiment, the drain port portion 10 has the tubular portion 11 (an example of the first tubular portion) having the outlet portion 14 formed at one end. . The lid 30 has a tubular shape with one end closed. The lid 30 is attached to the outlet portion 14 by screwing the inner peripheral portion of the lid 30 and the outer peripheral portion of the tubular portion 11 together. According to this configuration, workability when attaching and detaching the lid 30 to and from the drain port portion 10 can be improved. Further, according to this configuration, the amount of compressive displacement of the coil spring 40 can be adjusted by adjusting the tightening torque of the lid 30 with respect to the drain port 10. Therefore, even if the water stopcock 20 contracts, by keeping the tightening torque of the lid 30 constant, the biasing force of the coil spring 40 acting on the water stopcock 20 can be made constant.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the above-mentioned embodiment, the water stopcock 20 made of an elastic body is taken as an example, but the water stopcock 20 does not necessarily have to be made of an elastic body. Even if the water stopper 20 is not made of an elastic body, the water stopper 20 can be brought into close contact with the inner peripheral surface 16 by the urging force of the coil spring 40, so that the water stopper 20 can be kept watertight. be able to.

  Further, although the air conditioner has been described as an example in the above-described embodiment, the present invention can be applied to various devices including a water stopcock.

  DESCRIPTION OF SYMBOLS 10 Drainage port part, 11 Cylindrical part, 12 Flange part, 13 Inlet part, 14 Exit part, 15 Drainage port, 16 Inner peripheral surface, 17 Locking claw, 18 Male screw, 20 Water stopcock, 21 Cylindrical part, 22 Bottom part, 23 hollow part, 24 outer peripheral surface, 25a, 25b convex part, 26 grip part, 30 lid, 31 tubular part, 32 bottom part, 33 locking hole, 34 positioning rib, 35 hooking part, 36 female screw, 40 coil Spring, 100 indoor unit, 101 housing, 102 decorative panel, 103 fan motor, 104 turbo fan, 105 heat exchanger, 106 drain pan, α inclination angle, β contraction width.

Claims (6)

A drain pan that receives drain water from the heat exchanger,
An inlet opening to the inside of the drain pan, an outlet opening to the outside of the drain pan, and a tapered inner circumference formed between the inlet and the outlet and having a larger diameter toward the outlet. A drain outlet portion for draining drain water in the drain pan having a surface;
A water stopcock that is removably inserted into the drainage port from the outlet side, and is in close contact with the inner peripheral surface,
A lid detachably attached to the outlet,
An urging member that is arranged between the water stopcock and the lid, and urges the water stopcock toward the inlet portion,
Equipped with
The drain port portion has a first tubular portion having the outlet portion formed at one end,
The lid has a tubular shape with one end closed,
The lid is an air conditioner attached to the outlet by screwing an inner peripheral portion of the lid and an outer peripheral portion of the first tubular portion .   The air conditioner according to claim 1, wherein the water stopcock has an annular convex portion that is in close contact with the entire circumference of the inner peripheral surface.   The air conditioner according to claim 1 or 2, wherein the stop cock is made of an elastic body. The stopcock is
A second tubular portion having an outer peripheral surface facing the inner peripheral surface;
A bottom portion formed at an end portion on the inlet portion side of the second tubular portion,
The air conditioner according to any one of claims 1 to 3 , further comprising: a hollow portion that is formed inside the second tubular portion and has an end portion on the outlet portion side that is open. The air conditioner according to claim 4 , wherein the water stopcock has a handle portion formed to project from the bottom portion toward the hollow portion. The biasing member is a coil spring,
The air conditioner according to any one of claims 1 to 5 , wherein the lid has a hook portion for mounting the coil spring.

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