JP2010169279A - Air conditioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning device capable of elongating a service life of an antibacterial agent. <P>SOLUTION: A drain pan 40 is provided with an antibacterial agent unit 250, the antibacterial agent unit 250 has a receiving section 240a for receiving an antibacterial agent 230 at an upper part with respect to the lowest water level H0 drainable by a drain pump 71, and a drainage introduction pathway is formed so that the drainage of which a water level is raised by the return water from the drain pump 71 due to the stop of the drain pump 71 can be introduced to the receiving section 240a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner that drains drain water stored in a drain pan with a drain pump.

A known air conditioner includes a heat exchanger, a drain pan that receives drain water generated by the heat exchanger, and a drain pump that pumps and drains drain water accumulated in the drain pan. .
In this type of air conditioner, semi-solid slime (hereinafter referred to as slime) may be generated in the drain water stored in the drain pan, and this slime may clog the drain pump and the drain hose. In order to solve this problem, there is one in which an antibacterial agent unit is disposed above a drain cap (drain plug) provided in the drain pan (see, for example, Patent Document 1).
JP 2006-194493 A

  However, in the conventional configuration, since the antibacterial unit is disposed at the deepest part of the drain pan by disposing the antibacterial unit above the drain cap (see paragraph No. 0029 of Patent Document 1), a cooling or humidifier is attached. If so, the antibacterial unit will always be immersed in the drain water. For this reason, there existed a problem that an antibacterial component will melt | dissolve more than necessary in drain water, and the lifetime of an antibacterial effect, ie, the lifetime of an antibacterial agent, will become short.

  Then, the objective of this invention is providing the air conditioning apparatus which can eliminate the subject which the prior art mentioned above has, and can lengthen the lifetime of an antibacterial agent.

In order to solve the above-described problems, the present invention includes a heat exchanger, a drain pan that receives drain water generated by the heat exchanger, and a drain pump that pumps up and drains the drain water accumulated in the drain pan. In the air conditioner, the drain pan is provided with an antibacterial agent unit, and the antibacterial agent unit is provided with a storage portion for storing the antibacterial agent above the lowest water level at which the drain pump can be drained. The drain water introduction path | route which can introduce into the said accommodating part the drain water which the water level rose with the return water from a drain pump by the stop is characterized by the above-mentioned.
According to the present invention, the antibacterial agent unit is provided with a container for storing the antibacterial agent above the lowest water level that can be drained by the drain pump, and the water level rises due to the return water from the drain pump when the drain pump is stopped. Since the drain water introduction path capable of introducing the drain water into the accommodating portion is formed, the life of the antibacterial agent can be extended as compared with the case where the antibacterial agent is always immersed in the drain water.

In the above configuration, the antibacterial agent unit is configured such that the accommodating portion is provided between a standing portion that is erected from the drain pan and whose upper surface is located above the suction port of the drain pump, and the upper surface of the standing portion. You may make it provide the cover part with which it opens and is mounted | worn. According to this structure, the accommodating part which accommodates an antibacterial agent can be simply provided above the suction port of a drain pump.
Moreover, the said structure WHEREIN: You may make it the groove part dented below from an upper surface as the said drain water introduction path | route in the said standing part. According to this configuration, the drain water introduction path can be widely secured while sufficiently securing the rigidity of the standing portion.
Further, in the above configuration, the standing portion is erected along a periphery of a recessed portion that is recessed downward and communicates with the groove portion in the horizontal direction, and the groove portion is spaced along the periphery of the recessed portion. You may make it form. According to this configuration, it is possible to smoothly distribute drain water to the antibacterial agent unit through the recess and the groove.

Moreover, in the said structure, you may make it provide the lower side accommodating part which can accommodate an antibacterial agent in the position lower than the said accommodating part between the said cover part and the said hollow part. According to this configuration, even when the water level of the drain water is not increased by the return water from the drain pump, the drain water can be brought into contact with the antibacterial agent.
Further, in the above configuration, the drain pan is provided with a drain hole and a drain cap for closing the through hole, and the antibacterial agent unit may be integrally formed on the drain cap. . According to this configuration, the arrangement of the antibacterial unit is facilitated because it is not necessary to separately secure the arrangement space of the antibacterial unit.

  According to the present invention, the antibacterial agent unit is provided with a container for storing the antibacterial agent above the lowest water level that can be drained by the drain pump, and the water level rises due to the return water from the drain pump by stopping the drain pump. Since the drain water introduction path | route which can introduce drain water into a accommodating part is formed, the lifetime of an antibacterial agent can be lengthened.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
FIG. 1 is a diagram showing an installation state of a ceiling-embedded air conditioner (indoor unit) according to the first embodiment. In the following description, directions such as up, down, left, and right are directions corresponding to the installation state.
The indoor unit 10 is configured in a so-called ceiling cassette shape in which the apparatus main body 20 is installed behind the ceiling and the decorative panel 100 is exposed from the ceiling. More precisely, the indoor unit 10 is in a four-way ceiling cassette shape having four outlets 120. It is configured.
The apparatus main body 20 includes a metal casing 21 that constitutes an outer case and accommodates air-conditioning components such as a blower 33 and a heat exchanger (indoor heat exchanger) 35. The housing 21 is formed by sheet metal processing of a metal plate, and includes a top plate portion (top plate) 21b and a side plate portion (side plate) 21c extending downward along the outer edge of the top plate portion 21b. The lower whole surface is formed in a box shape.

Suspension fittings 28 for suspending the apparatus main body 20 are provided on the four corners on the outer surface of the side plate portion 21c of the casing 21, respectively. The suspension fitting 28 is attached to a suspension bolt 29 on the back of the ceiling, and is supported in such a manner that the apparatus main body 20 is suspended. In addition, the apparatus main body 20 can be fixed to a holding bar provided in a lattice shape on the ceiling surface.
The decorative panel 100 is attached to the lower part of the apparatus body 20, that is, the lower part of the housing 21. The decorative panel 100 is formed of a resin panel, has a rectangular shape larger than the lower opening of the housing 21, and has a single inlet 110 for taking in indoor air at the center thereof. A plurality of (four in this example) air outlets 120 are provided around the mouth 110 along the four sides of the decorative panel 100 to blow out air after heat exchange.

A suction grill 111 is detachably attached to the suction port 110 of the decorative panel 100, and an air filter (not shown) is attached to the suction grill 111, and indoor air sucked into the suction port 110 by the air filter is received. Clean. Further, a louver 122 for changing the wind direction is disposed at the outlet 120 of the decorative panel 100, and the louver 122 is rotated by driving a motor (not shown).
Corner panels 102 are attached to the four corners of the decorative panel 100. The corner panel 102 is configured to be detachable toward the lower side of the decorative panel 100. When the corner panel 102 is removed, the corner panel 102 is manually attached to the above-described engagement position between the hanging bracket 28 and the hanging bolt 29. The size is such that can enter.

  2 is a perspective view showing the apparatus main body 20 of the indoor unit 10, and FIG. 3 is a view of the apparatus main body 20 as viewed from below. A heat insulating material 30 made of polystyrene foam is disposed inside the housing 21. The heat insulating material 30 includes a top plate heat insulating portion (not shown) disposed on substantially the entire top plate portion (top plate) 21 b of the housing 21 and a side plate disposed on substantially the entire surface of the side plate portion 21 c of the housing 21. The heat insulation part 30c is integrally provided and is formed in a box shape having a lower opening. Thus, the heat insulating material 30 has a heat insulating structure that covers the entire inner surface of the housing 21 and insulates between the inside and outside of the housing 21, and the blower 33, the heat exchanger 35, etc. The air-conditioning parts are arranged.

As shown in FIGS. 2 and 3, the blower 33 is provided substantially at the center of the housing 21 (a position corresponding to the central portion of the top plate portion 21 b), and the motor shaft faces the top plate portion 21 b of the housing 21 downward. The fan motor 33a is attached to the motor shaft (reference numeral 33a is attached to the motor shaft in FIG. 3) and the centrifugal fan 33b is attached to the motor shaft of the fan motor 33a. Air in the conditioned room (room air) is sucked from the suction port 110 of the panel 100 and blown out in the centrifugal direction.
The heat exchanger 35 (see FIG. 3) is a fin-and-tube heat exchanger, and is arranged in a polygonal shape so as to surround the blower 33 in order to secure a large heat exchange area. One end 35 a and the other end 35 b of the heat exchanger 35 are connected by a tube plate 36.

As shown in FIG. 3, the tube plate 36 is inclined with respect to the longitudinal direction of the side plate portion 21 c of the housing 21 so as to expand the outer space S1 (space between the tube plate 36 and the housing 21). The refrigerant piping 37 connected to the heat exchanger 35 is arranged in the space S1. The external connection port 37a of the refrigerant pipe 37 is exposed to the outside from the end portion of the side plate portion 21c (indicated by reference numeral 21c1 in FIG. 3) adjacent to the tube plate 36, and is piped from the outside of the casing 21. Connection work is configured to be possible.
A drain pipe 38 through which a drain pump 71 (described later) in the inner space (space between the heat exchanger 35 and the casing 21) S2 discharges drain water is provided at the opposite end of the side plate portion 21c1. It is exposed to the outside and is configured so that the drain pipe 38 can be connected from the outside of the casing 21. Thus, since the refrigerant | coolant piping 37 and the drain piping 38 are comprised so that connection from one side-plate part 21c1 of the housing | casing 21 is possible, the piping operator can perform work from the substantially same position.

Under this heat exchanger 35, a drain pan 40 made of styrene foam is arranged to prevent the drain water from the heat exchanger 35 from leaking into the conditioned room, and the drain pan 40 is disposed inside the casing 21. It also serves as a part of the heat insulating material for heat insulation.
The drain pan 40 has a suction opening 40a at a portion corresponding to the suction port 110 of the decorative panel 100. A bell mouth 42 is attached to the suction opening 40a, and the suction opening 40a. The contact part 40b (refer FIG. 2) which the outer peripheral part protrudes below and contacts the decorative panel 100 is formed.

  The contact portion 40 b extends so as to surround the blower 33 and has a shape that contacts a region between the suction port 110 of the decorative panel 100 and the outlet 120, and the suction port 110 of the decorative panel 100. Only communicates with the suction portion (centrifugal fan 33b) of the blower 33 through the suction passage α surrounded by the contact portion 40b. In other words, the contact part 40b functions as a partition that does not allow the blower outlet 120 of the decorative panel 100 to communicate with the suction passage α. Inside the suction passage α, an electrical box 44 for housing electrical components is disposed near the side plate 21c1 of the housing 21 so as not to overlap the opening of the bell mouth 42.

Further, the drain pan 40 is provided with a plurality (four in this example) of blowout openings 40c at portions corresponding to the blowout openings 120 of the decorative panel 100, and the blowout openings 40c serve as heat exchanges. It functions as an air outlet β that guides the air (conditioned air) that has passed through the vessel 35 to the air outlet 120 of the decorative panel 100.
For this reason, by the operation of the blower 33, the indoor air is sucked from the suction port 110 of the decorative panel 100, passed through the heat exchanger 35 after being sucked into the housing 21 through the suction opening 40a of the drain pan 40, The heat exchanger 35 exchanges heat between the indoor air and the refrigerant. Then, the heat-exchanged conditioned air is blown out from the blow-out opening 120 of the decorative panel 100 to the conditioned room through the blowing opening 40c of the drain pan 40, whereby the conditioned room is air-conditioned.

FIG. 4 is a side sectional view showing the drain pump 71 in operation together with the peripheral configuration.
At the time of air conditioning operation (for example, at the time of cooling operation), drain water is generated by the heat exchanger 35, and this drain water is on the upper surface side of the drain pan 40, and is a concave groove formed along the heat exchanger 35. It flows down to a certain drain reservoir 40g.
In the drain pan 40 of this configuration, the deepest portion of the drain reservoir 40g (hereinafter referred to as the drain deepest portion 40h) is formed on one end side (portion corresponding to the space S2) of the drain pan 40, and all drain water is the deepest drain. Part 40h is collected. A drain pump 71 that pumps up drain water accumulated in the drain deepest portion 40h and drains it to the outside is disposed above the deepest drain portion 40h.

  The drain pump 71 is fixed to the apparatus main body 20 via an attachment member (not shown) so that the suction port 71a of the drain pump 71 faces the drain deepest portion 40h. For this reason, when the drain pump 71 is operated, the drain water accumulated in the deepest drain portion 40h is sucked into the drain pump 71 and discharged to the outside via the drain pipe 38 connected to the drain port of the drain pump 71. The In this air conditioner, the drain pump 71 operates during the air conditioning operation, and when the air conditioning operation stops, the operation of the drain pump 71 also stops.

In addition, the drain deepest portion 40h is provided with a drain hole through-hole 40j penetrating vertically. Here, as shown in FIG. 4, the drain pan 40 of this configuration is configured by covering the upper surface of a polystyrene pan drain pan body 40d with a resin frame 40e, and this resin frame 40e extends into the through hole 40j. By constituting the wall portion of the through hole 40j, the rigidity of the through hole 40j is increased, and as a result, the rigidity of the entire drain pan 40 is improved.
This through hole 40j is not directly below the suction port 71a of the drain pump 71, but extends vertically on the side of the suction port 71a (in this example, between the suction port 71a of the drain pump 71 and the heat exchanger 35). It is formed in the hole. Further, the through hole 40j is normally closed by a drain cap (drain plug) 200, and drain water stored in the drain pan 40 is discharged by removing the drain cap 200 during various maintenance or cleaning of the drain pan 40. Work can be done.

FIG. 5 is a perspective view of the drain cap 200, and FIG. 6 is an exploded perspective view of the drain cap 200.
As shown in FIGS. 5 and 6, the drain cap 200 includes a drain cap main body (main body portion) 210 that is inserted into the through hole 40 j of the drain pan 40, and a lid portion 220 that is detachably provided on the drain cap main body 210. have. The drain cap body 210 is formed of an elastic material such as rubber, and includes a shaft portion 211 inserted into the through hole 40j of the drain pan 40, a large-diameter collar portion 213 provided at a lower end portion of the shaft portion 211, A standing portion 215 standing upward from the shaft portion 211 is integrally provided.

The shaft portion 211 is formed with a plurality of small-diameter collar portions 212 that are continuous in the circumferential direction of the drain cap 200 at intervals in the axial direction, and the outer diameter of the small-diameter collar portion 212 is larger than the inner diameter of the through hole 40j of the drain pan 40. Is also formed slightly larger. As a result, when the shaft portion 211 is inserted into the through hole 40j, the small-diameter collar portion 212 is elastically deformed and closely contacts the through hole 40j, thereby closing the gap between the shaft portion 211 and the through hole 40j. As described above, since the gap is closed by the small-diameter collar portion 212 that is easily elastically deformed, the attachment and detachment work of the drain cap 200 can be facilitated while improving the adhesion between the drain cap 200 and the through hole 40j.
In addition, the small-diameter collar portion 212 is formed in a plurality of collar portions that are continuous for each circumference of the drain cap 200, and according to this, it is assumed that the small-diameter collar portion 212 is formed in a spiral portion that is continuous in a spiral shape like a screw thread. Then, although the water which entered between the collar parts leaks, even if water exists between the small diameter collar parts 212 in this configuration, the water is surely prevented from leaking.

  The large-diameter collar portion 213 is formed to have a larger diameter than the through-hole 40j and the small-diameter collar portion 212. When the drain cap 200 is attached to the through-hole 40j, the large-diameter collar portion 213 is formed in the through-hole 40j. The attachment position of the drain cap 200 is positioned in contact with the periphery of the lower end. In addition, a knob portion 214 for an operator to hold the drain cap 200 is formed inside the large-diameter collar portion 213, that is, on the lower end portion of the drain cap 200.

As shown in FIG. 6, the standing portion 215 has a shape that stands up in a ring shape along the periphery of the central recess portion 216, and is spaced apart in the circumferential direction (120 ° interval in this example). A plurality of (three in this example) groove portions 217 are formed that are recessed downward from the upper surface 215a and communicate with the hollow portion 216 in the horizontal direction.
As shown in FIG. 4, when the drain cap 200 is attached to the drain pan 40, the standing portion 215 protrudes above the deepest drain portion 40h of the drain pan 40, and the upper surface 215a is sucked into the drain pump 71. It is formed at a height H1 located above the height H0 of the mouth 71a.
Here, the height H0 of the suction port 71a of the drain pump 71 corresponds to the lowest water level that can be drained by the drain pump 71. That is, the upper surface 215a of the standing portion 215 is the lowest level that the drain pump 71 can drain. It is located above the water level.

Further, as shown in FIG. 6, the groove portion 217 of the standing portion 215 is formed as a groove extending downward from the upper surface 215a of the standing portion 215, and at least the lower surfaces of the groove portion 217 and the recessed portion 216 are drain pumps. The position is lower than the height H0 of the 71 inlet port 71a. For this reason, even if the drain water accumulated in the drain deepest portion 40 h of the drain pan 40 is less than the lowest water level that can be drained by the drain pump 71, it flows into each groove portion 217. As a result, drain water can be caused to flow into the central recess 216 via each groove 217, and drain water that has flowed into this recess 216 can be allowed to flow out via each groove 217. That is, a drain water introduction path is formed for allowing drain water to flow through the drain cap body 210 in the horizontal direction and to be introduced into the drain cap 200.
If the drain water is circulated in the horizontal direction in this way, the drain cap body 210 does not hinder the flow of drain water flowing toward the suction port 71a of the drain pump 71, in other words, the drain water is sucked into the suction port of the drain pump 71. It is possible to make the drain cap 200 easy to flow through 71a.

  Further, a concave hooking portion 218 for attaching the lid portion 220 to the drain cap body 210 is formed on the outer peripheral portion of the standing portion 215 with a gap in the circumferential direction. Engagement portions 221 (see FIG. 4) provided inside the lid portion 220 are respectively hooked on the hook portions 218, and in this state, the lid portion 220 is rotated in a predetermined direction with respect to the drain cap body 210. As a result, the locking portion 221 fits into the innermost portion 218 a of the hook portion 218, and the lid portion 220 is fixed to the drain cap body 210. Also, the lid 220 can be easily removed from the drain cap body 210 by rotating the lid 220 in the reverse direction.

The lid portion 220 is formed of a transparent material such as a transparent resin, and the standing portion is provided with an accommodating portion 240 (see FIG. 4) for accommodating the antibacterial agent 230 between the upper surface 215a of the standing portion 215. It is formed in a shape that covers 215 from above. More specifically, the lid portion 220 has an upper cover portion 223 having a diameter substantially the same as the diameter of the standing portion 215, and extends downward from the outer edge of the upper cover portion 221 so as to substantially extend the outer peripheral side of the standing portion 215. A cylindrical portion 225 for covering is integrally provided.
A locking portion 221 (see FIG. 4) that is hooked on a hooking portion 218 provided on the standing portion 215 is provided on the inner peripheral side of the cylindrical portion 225, and this locking portion 221 is the outermost portion of the hooking portion 218. The lid 220 is positioned on the drain cap body 210 by entering the back part 218a. In this positioning state, as shown in FIG. 4, the upper cover portion 221 of the lid portion 220 is at a position higher than the upper surface 215a of the standing portion 215 (corresponding to the upper surface of the drain cap body 210), and the space therebetween A housing part 240 for housing the antibacterial agent 230 is formed.

  In this accommodating part 240, the silver ion antibacterial agent formed in granular form (for example, spherical shape) is accommodated as the antibacterial agent 230. This antibacterial agent 230 is a slime generation preventing agent that mixes silver fine powder (antibacterial component) in the drain water by contacting with the drain water, thereby preventing slime from being generated in the drain water. Here, the granular antibacterial agent is used because even when the entire interior of the housing 240 is filled with the antibacterial agent 230, a gap for allowing drain water to pass between the antibacterial agents 230 is secured and the antibacterial component ( This is because it is easy to mix silver fine powder). However, as long as it functions as a slime generation inhibitor, not only the silver ion antibacterial agent but also other antibacterial agents may be used. In addition, this antibacterial agent 230 may be accommodated in the accommodating part 240 in the state which put the water in the net-like bag which can distribute | circulate, and may be accommodated in the accommodating part 240 without using a bag.

In this configuration, the housing portion 240, which is a space between the lid portion 220 and the drain cap body 210, has a housing space at a position higher than the upper surface 215 a of the standing portion 215 (hereinafter referred to as the upper housing portion 240 a), and a recess. It is comprised from the accommodation space (henceforth the lower accommodation part 240b) of a position lower than the upper surface 215a of the standing part 215 formed of the part 216. For this reason, the antimicrobial agent 230 accommodated in this accommodating part 240 is accommodated in both the upper accommodating part 240a and the lower accommodating part 240b, and is arrange | positioned over the upright part 215. As shown in FIG.
As described above, since the upper surface 215a of the standing portion 215 is located above the height H0 of the suction port 71a of the drain pump 71, the antibacterial agent 230 extends over the suction port 71a of the drain pump 71. In addition, since the upper accommodating portion 240a is formed in a space whose diameter is larger than that of the lower accommodating portion 240b, a large amount of the antimicrobial agent 230 can be accommodated in the upper accommodating portion 240a. A large storage space for the agent 230 can be secured.

  Further, an opening 227 communicating with a groove 217 provided in the standing portion 215 of the drain cap body 210 is formed at a lower portion of the lid portion 220 (corresponding to a lower portion of the tube portion 225) with an interval in the circumferential direction. Thus, the lid 220 is configured so as not to disturb the flow of drain water to the drain cap main body 210. In addition, a large number of slit-like openings 228 are formed at an upper portion of the cover portion 220 (corresponding to the upper portions of the upper cover portion 223 and the cylindrical portion 225), and thus, through these openings 228. Therefore, when the drain water flows into or out of the drain cap body 210, the air between the drain cap body 210 and the lid section 220 becomes the resistance of the drain water. Therefore, the drain water can be easily distributed.

Thus, in the present embodiment, the antibacterial agent unit 250 that mixes the antibacterial agent 230 in the drain water is configured by providing the accommodating portion 240 that accommodates the antibacterial agent 230 inside the drain cap 200, and this The antibacterial agent unit 250 is provided with an upper storage portion 240a for storing the antibacterial agent 230 above the lowest water level that can be drained by the drain pump 71, and a drain water introduction path for introducing drain water into the drain cap 200. A functioning groove 217 and recess 216 are formed.
For this reason, when the operation is stopped from the state in which the drain pump 71 is activated and the drain water is pumped up, the drain water remaining in the drain pump 71 and the drain pipe 38 connected to the drain pump 71 is dropped by its own weight. When returning to the drain pan 40 from the suction port 71a, as shown in FIG. 7, the water level of the drain water stored in the drain pan 40 with this return water is higher than the suction port 71a (in FIG. 7, the water level H2, here H2>H1> H0), the drain water enters the upper housing portion 240a through the groove portion 217 and the recess portion 216, contacts the antibacterial agent 230 in the upper housing portion 240a, and generates slime. Can be suppressed.
That is, the upper accommodating portion 240a is provided at a position that is not less than the height H1 that is located above the height H0 of the suction port 71a of the drain pump 71 and lower than the water level H2 that has risen with the return water of the drain pump 71. . In addition, the water level H2 shown in FIG. 7 has shown the returned water level when drain pipe length is the maximum length.

On the other hand, when the drain pump 71 is operating, the level of the drain water is lowered, so that the drain water does not enter the upper housing portion 240a or even if it enters, the antibacterial in the lower portion of the upper housing portion 240a. The contact with the agent 230 does not contact the antibacterial agent 230 in the upper portion, and consumption of the antibacterial agent 230 in the upper housing portion 240a can be avoided. Therefore, compared with the case where the antibacterial agent 230 is always immersed in the drain water, it is possible to avoid the situation where the antibacterial component dissolves more than necessary in the drain water, and the period during which the antibacterial effect lasts, that is, the life of the antibacterial agent 230 is increased. Can be extended.
Here, the slime is likely to occur when the drain water continues to be stored in the drain pan 40. In practice, the air conditioning operation is stopped after the operation in which the drain water accumulates (cooling operation). In this case, the state continues. In this configuration, when the air-conditioning idling stops and the drain pump 71 also stops and the water level of the drain pan 40 rises with the return water, this drain water enters the upper housing 240a and contacts the antibacterial agent 230, so that slime is generated. The drain water can be brought into contact with the antibacterial agent 230 when the drain pump 71 is easily stopped, and slime generation can be effectively suppressed.

  In addition, the antibacterial agent unit 250 of the present embodiment is provided with a lower accommodating portion 240b that accommodates the antibacterial agent 230 below the lowest water level H0 that can be drained by the drain pump 71. Therefore, the return water from the drain pump 71 is provided. Even when the water level of the drain water has not risen, the drain water passes through the groove portion 217 and the recess portion 216 and enters the lower housing portion 240b, contacts the antibacterial agent 230 in the lower housing portion 240b, and slime. Can be suppressed.

As described above, according to the present embodiment, the antibacterial agent unit 250 is provided in the drain pan 40, and the antibacterial agent 230 is placed in the antibacterial agent unit 250 above the lowest water level H0 that the drain pump 71 can drain. A groove portion 217 and a recess functioning as a drain water introduction path that is provided with an upper storage portion 240a to be stored and that is capable of introducing drain water whose water level has risen due to return water from the drain pump 71 by stopping the drain pump 71 into the upper storage portion 240a. Since the part 216 is formed, the lifetime of the antibacterial agent can be extended while effectively suppressing slime generation.
In addition, the antibacterial agent unit 250 is disposed between the upright portion 215 erected from the drain pan 40 and having an upper surface 215 a positioned above the suction port 71 a of the drain pump 71 and the upper surface 215 a of the upright portion 215. Since the lid portion 220 is mounted with the housing portion 240a open, the upper housing portion 240a for housing the antibacterial agent 230 can be simply provided above the suction port 71a of the drain pump 71, and the antibacterial agent The antibacterial agent 230 can be easily and reliably held at the position by surrounding the antibacterial agent 230 with the 230 and the lid 220. Moreover, if the cover part 220 is removed, the antibacterial agent 230 can be easily replaced, and the state of the antibacterial agent 230 can be easily visually recognized from the outside by forming the cover part 220 with a transparent material as in this embodiment. become.

Furthermore, in this configuration, since the drain water introduction path is a groove portion 217 that is recessed downward from the upper surface 215a of the standing portion 215, the drain water is introduced by forming a through hole in the standing portion 215. As a result, it is possible to ensure a wide drain water introduction path communicating with the upper accommodating portion 240a while sufficiently ensuring the rigidity of the standing portion 215.
Further, the standing portion 215 is erected along the periphery of the recess portion 216 that is recessed downward and communicates with the groove portion 217 in the horizontal direction, and the groove portion 217 is formed at intervals along the periphery of the recess portion 216. Therefore, it is possible to smoothly distribute drain water to the antibacterial agent unit 250 through the recess 216 and the groove 217.
Further, since the lower housing portion 240b capable of housing the antibacterial agent 230 is provided between the lid portion 220 and the recess portion 216 at a position lower than the upper housing portion 240a, drain water is used as the return water from the drain pump 71. Even when the water level is not increased, the drain water can be brought into contact with the antibacterial agent 230 to suppress generation of slime.

In addition, a slit-shaped opening 228 that allows air to flow inside and outside the lid 220 is formed in the upper part of the lid 220, so that drain water can easily flow into the lid 220 and the drain water is covered by the lid. The portion 220 can easily flow out from the inside. In addition, since the opening 228 is slit-like, it is possible to prevent an object other than drain water (a relatively large object) from entering the lid part 220 from the outside of the lid part 220.
Furthermore, in this configuration, since the antibacterial unit 250 is integrally formed on the drain cap 200, it is necessary to separately secure the arrangement space as compared with the case where this type of antibacterial unit is formed separately. Therefore, the arrangement of the antibacterial agent unit 250 is facilitated.

<Second Embodiment>
8 to 10 show a second embodiment. In the second embodiment, a recess 220x is formed at the center of the lid 220 of the antibacterial agent unit 250 (see FIG. 8), and the bottom of the recess 220x is at the center of the drain cap body (main body) 210. It comes in contact with the provided recess 216 (see FIG. 9).
For this reason, the accommodating part 240 formed between the cover part 220 of the antibacterial agent unit 250 and the drain cap body 210 is positioned higher than the upper surface 215a of the standing part 215, as shown in FIGS. Only the upper housing portion 240a is provided, and the lower housing portion 240b described in the first embodiment is not formed.

For this reason, when the operation is stopped from the state in which the drain pump 71 is activated and the drain water is pumped up, the drain water remaining in the drain pump 71 and the drain pipe 38 connected to the drain pump 71 is dropped by its own weight. Then, when returning from the suction port 71a into the drain pan 40, as shown in FIG. 10, the water level H2 (H2>H1> H0) in which the level of the drain water stored in the drain pan 40 with this return water is higher than that of the suction port 71a. To rise. In this case, the drain water flows through the groove portion 217 of the drain cap body 210 into the upper storage portion 240a and contacts the antibacterial agent 230 in the upper storage portion 240a. That is, the groove portion 217 functions as a drain water introduction path for introducing drain water into the drain cap 200.
Thereby, drain water can be made to contact antibacterial agent 230 at the time of stop of drain pump 71, and generation of slime can be suppressed effectively.

On the other hand, when the drain pump 71 is operating, the level of the drain water is lowered, so that the drain water does not enter the upper housing portion 240a or even if it enters, the antibacterial in the lower portion of the upper housing portion 240a. The contact with the agent 230 does not contact the antibacterial agent 230 in the upper portion, and consumption of the antibacterial agent 230 in the upper housing portion 240a can be avoided.
That is, in this embodiment, when the water level rises with the return water from the drain pump 71, the drain water comes into contact with the antibacterial agent 230, and when the drain water level is low, that is, when the drain pump 71 is operated, Almost no contact with antibacterial agent 230. As described above, the slime is likely to be generated when the drain pump 71 is stopped in a state in which the drain water is stored. In this embodiment, the drain water is brought into contact with the antibacterial agent 230 in this case. In addition to the various effects of the first embodiment, such as the ability to extend the life of the antibacterial agent 230 while effectively suppressing the occurrence of the above, it is possible to equalize the degree of wear of the entire antibacterial agent 230.

Further, in this embodiment, as shown in FIG. 8, openings 229 extending from the upper end to the lower end are formed at intervals in the circumferential direction on the side wall of the recess 220 x provided in the center of the lid portion 220. The lower portions of the openings 229 communicate with the inner peripheral side of the groove portion 217 provided in the standing portion 215 of the drain cap main body 210.
For this reason, the drain water can be circulated in the horizontal direction through the lower part of the opening part 229 and the groove part 217, and the upper part of the opening part 229 circulates air inside and outside the lid part 220. It functions as a hole, and it is possible to facilitate the introduction of drain water into the lid portion 220 (upper accommodating portion 240a).

  Note that the above embodiment is an aspect of the present invention and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the case where the present invention is applied to a four-way ceiling cassette type air conditioner has been described. However, the present invention is not limited to this, and the two-way ceiling cassette type air conditioner or humidifier (humidification function). It can be widely applied to other air conditioners such as an air conditioner equipped with

It is a figure which shows the installation state of the ceiling embedded type air conditioning apparatus (indoor unit) which concerns on 1st Embodiment. It is a perspective view which shows the apparatus main body of an indoor unit. It is the top view which looked at the apparatus main body from the downward direction. It is side sectional drawing which shows the drain pump at the time of an action | operation with a periphery structure. It is a perspective view of a drain cap. It is a disassembled perspective view of a drain cap. It is a sectional side view which shows the drain pump at the time of an operation | movement stop with a periphery structure. It is a disassembled perspective view of the drain cap of the ceiling embedded type air conditioning apparatus which concerns on 2nd Embodiment. It is side sectional drawing which shows the drain pump at the time of an action | operation with a periphery structure. It is a sectional side view which shows the drain pump at the time of an operation stop with a periphery structure.

10 Indoor unit (air conditioner)
20 Device body 35 Heat exchanger 38 Drain pipe 40 Drain pan 40g Drain pool part 40h Drain deepest part 40j Through hole 71 Drain pump 71a Suction port 200 Drain cap 210 Drain cap body (main body part)
215 Standing portion 216 Recessed portion 217 Groove portion 220 Lid portion 230 Antibacterial agent 240 housing portion 240a upper housing portion 240b lower housing portion

Claims (6)

In an air conditioner including a heat exchanger, a drain pan that receives drain water generated by the heat exchanger, and a drain pump that pumps up and drains drain water accumulated in the drain pan.
The drain pan is provided with an antibacterial agent unit,
The antibacterial agent unit is provided with a storage portion for storing the antibacterial agent above the lowest water level that can be drained by the drain pump, and drain water whose water level has risen due to return water from the drain pump when the drain pump is stopped. An air conditioner characterized in that a drain water introduction path that can be introduced into the housing portion is formed.   The antibacterial agent unit is installed with the housing portion provided between the standing portion standing from the drain pan and having an upper surface located above the suction port of the drain pump and the upper surface of the standing portion. The air conditioner according to claim 1, further comprising a lid portion.   The air conditioner according to claim 2, wherein a groove portion recessed downward from the upper surface is formed in the standing portion as the drain water introduction path.   The standing portion is erected along a periphery of a recessed portion that is recessed downward and communicates with the groove portion in the horizontal direction, and the groove portion is formed with an interval along the periphery of the recessed portion. The air conditioner according to claim 3.   5. The lower housing portion capable of housing an antibacterial agent is provided between the lid portion and the recess portion at a position lower than the housing portion. Air conditioner.   The drain pan is provided with a drain hole and a drain cap for closing the through hole, and the antibacterial agent unit is formed integrally with the drain cap. The air conditioning apparatus according to any one of 5.

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