CN1880872A - Air conditioner - Google Patents

Abstract

The present invention provides an air conditioner that smoothly guides a large amount of drain water accumulated on the secondary side of the drain pan to the primary side, can reliably perform drainage treatment of the drain, and prevents air that has not undergone heat exchange from passing through the drain channel. Direct intrusion into the secondary side improves heat exchange efficiency and air conditioning performance. The air conditioning device comprises: a box body (1), which has an air inlet (11) and an air blower outlet (12); a blower (8), which is accommodated in the box body, and forms a heat exchange air flow path ( R); the heat exchanger (9), which is located on the heat exchange air flow path; and the drain pan (10); the drain pan includes: a bearing part (20) carrying the heat exchanger; On both sides, the primary side drain receiving part (21) provided on the upstream side of the heat exchange air flow path and the secondary side drain receiving part (22) provided on the downstream side; guide the drainage received by the secondary side drain receiving part The first drain flow path (27) and the second drain flow path (28) that flow out of the load-bearing portion temporarily from both sides of the load-bearing portion and then lead to the primary side drain receiving portion after bypassing the load-bearing portion.

Description

air conditioner

technical field

The invention relates to a built-in type air conditioner, which is installed on the back side of the ceiling and communicates with the air outlet on the ceiling through a duct.

Background technique

When air conditioning a large space such as a store, the built-in type installed on the back side of the ceiling is more advantageous than the so-called wall-mounted type installed on the indoor wall. That is to say, such an indoor unit is connected to more than one air blowing outlet provided on the ceiling through a pipe, and can blow out heat-exchanging air into the room, so that the occupants will not feel oppressed. In addition, when the indoor space is large, an appropriate number of ceiling air blowing outlets are distributed in accordance with the size, so that uniform air conditioning can be achieved in the room.

The indoor unit of the above-mentioned built-in air conditioner has a blower, a heat exchanger, and a drain pan (drain pan) arranged at the lower part of the heat exchanger for carrying the heat exchanger in the casing. The drain pan sandwiches the mounting portion on which the heat exchanger is mounted, and forms drain water receiving portions on the upstream side (primary side) and downstream side (secondary side) of the heat exchange air flow path.

In such a structure, by forming a refrigeration cycle operation and driving a blower, the heat-exchanged air is blown out into the room through the duct. Moisture contained in the indoor air is condensed with heat exchange, thereby generating drain water and dripping down into the drain pan.

Comparing the receiving parts of the secondary side and the primary side of the above drain pan, it can be seen that the secondary side is more likely to accumulate drainage than the primary side due to the existence of the pressure difference caused by the ventilation resistance. In addition, depending on the shape of the pipes during construction on site, the air volume will also fluctuate greatly. The larger the air volume of the blower, the more drainage will be accumulated on the secondary side. As a result, the lower part of the heat exchanger will submerged in water.

Since the lower part of the heat exchanger is submerged by the drain water, the heat exchange efficiency of the heat exchanger is lowered and the performance is lowered. As the temperature of the heat exchanger decreases, the drain water will freeze into ice, and depending on the conditions, the frozen ice will grow into large pieces, which may eventually cause damage to the heat exchanger itself. Furthermore, a large amount of drain water accumulated on the secondary side may be blown away by the blown air, and may be directly scattered into the room together with the heat exchange air, thereby degrading the comfort of the air conditioner.

Then, the following patent document discloses an air conditioner that has a drain tray that utilizes the wind pressure difference of the heat exchanger to return a large amount of drain water accumulated on the secondary side to the primary side smoothly, and can easily drain the drain to the primary side. It drains to the outside. Specifically, its structure is as follows: a convex portion carrying the heat exchanger is provided in the center of the drain tray, a first groove is provided on the downstream side (secondary side) of the convex portion, and a larger than the first groove is provided on the upstream side (primary side). The deep second groove, these first grooves and the second grooves are connected by a plurality of inclined passages.

Patent document: Publication No. 62-176612 of Shikaizhao.

According to the above-mentioned patent document, as the heat exchange proceeds, the drain flowing down from the surface of the heat exchanger is affected by the wind pressure of the blower and accumulates in a large amount in the first groove of the drain tray located on the downstream side. These drains are introduced into the second groove on the upstream side through the inclined passage provided on the convex part, and are discharged out of the box from the drain pipe provided on the second groove side.

However, the above-mentioned inclined passage is provided in a straight air supply air path connecting the air supply fan through the heat exchanger to the air blowing outlet. Therefore, although most of the air blown from the blower is introduced into the heat exchanger, it has a disadvantage that a part of the air enters the inclined passage and flows into the first groove on the secondary side.

That is, a part of the air directly flows into the secondary side through the inclined passage without performing heat exchange in the heat exchanger, resulting in a decrease in heat exchange efficiency. Furthermore, there is a possibility that a part of the drain water introduced into the inclined duct may be blown into the room from the air outlet along with the heat exchange air flow in the air supply air passage.

Contents of the invention

The present invention has been made in view of the above-mentioned situation, and its object is to provide an air conditioning device that smoothly guides a large amount of drain water that has accumulated on the secondary side of the drain pan under the influence of wind pressure to the primary side, and can reliably perform air conditioning. The drainage treatment of the drainage prevents the air that has not undergone heat exchange from directly invading the secondary side through the drainage channel, thereby improving the heat exchange efficiency and air-conditioning performance.

In order to solve the above-mentioned problems and achieve the above-mentioned purpose, the air-conditioning device of the present invention includes: a box body, which has an air suction port and an air blowing port; Wherein the heat exchange air flow path sucks the heat exchange air from the air suction port into the box body with the drive of the blower, and then blows it out from the air outlet; the heat exchanger is located on the heat exchange air flow path; and the drain pan, It is arranged at the lower part of the heat exchanger and carries the heat exchanger; the drain pan includes: a carrying part carrying the heat exchanger; clamping the carrying part on both sides, located on the upstream side of the heat exchange air flow path The primary side drain receiving part and the secondary side drain receiving part located on the downstream side of the heat exchange air flow path; guide the drainage received by the secondary side drain receiving part to temporarily flow out of the bearing part from both sides of the bearing part, And after bypassing the receiving part, it leads to the drainage flow path of the primary side drainage receiving part.

According to the present invention, the drainage process can be performed smoothly, and the intrusion of air without heat exchange through the drainage channel can be prevented, thereby producing effects such as improving heat exchange efficiency and air-conditioning performance.

Description of drawings

Fig. 1 is an explanatory diagram of an installed state of an indoor unit of an air-conditioning apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the indoor unit of the air-conditioning apparatus of the same embodiment.

Fig. 3 is a perspective view of a drain pan in the same embodiment.

Fig. 4 is a plan view of the drain pan in the same embodiment.

Fig. 5 is a perspective view seen from different directions for explaining the first drainage channel on the drain pan in the same embodiment.

Fig. 6 is a perspective view seen from different directions for explaining a second drainage channel on the drain pan in the same embodiment.

Symbol Description:

11 Air suction inlet 12 Blow outlet

1 box body R heat exchange air flow path

8 blower 9 heat exchanger

10 Drain pan 20 Bearing part

21 1st side drain receiving part 22 2nd side drain receiving part

27 1st drainage flow path 28 2nd drainage flow path

25 1st convex part 26 2nd convex part

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is an explanatory diagram of an installed state of an indoor unit of a built-in air conditioner according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of an indoor unit of an air conditioner.

Each surface of the box body 1 is formed of a thin metal plate through sheet metal processing, and a heat insulating structure is formed by arranging a heat insulating material (not shown) on the inner surface. The box body 1 in FIG. 1 is formed as a thin-plate rectangular box-like structure, wherein the dimension of the longitudinal direction X is smaller than the dimension of the direction perpendicular to the longitudinal direction X, that is, the direction of the front and back of the paper (hereinafter referred to as "width direction Y") , and the length in the up-down (vertical) direction is smaller.

A pair of installation tools 2 are respectively provided on both sides of the box body 1 in the X direction, and a suspension rod 4 vertically arranged from a beam 3 provided on the back side T of the ceiling is inserted and fixed on these installation tools 2 . The box body 1 is installed in the back side T of the ceiling, that is, between the beam 3 and the ceiling 5 .

The partition plate 6 is provided over the width direction Y of the box 1 at approximately half of the longitudinal position in the longitudinal direction X in the box 1 . The interior of the housing 1 is divided into two chambers 7A and 7B by a partition 6, and one chamber (the right chamber in the drawing) is called a machine chamber 7A, and a blower 8 is accommodated therein. The other chamber (the left chamber in the drawing) partitioned by the partition plate 6 is called a heat exchanger chamber 7B, and the heat exchanger 9 is accommodated here, and the drain pan 10 is arranged below the heat exchanger 9 .

An air inlet 11 is opened on the lower surface of the machine compartment 7A, and an air outlet 12 is opened on the front (left side in the drawing) of the heat exchanger compartment 7B. In the state that the above-mentioned box body 1 is installed and fixed on the back side T of the ceiling, the suction duct 13 is connected on the above-mentioned air suction port 11 , and more than or equal to one blow-out duct 14 is connected on the above-mentioned air blow-out port 12 . .

The above-mentioned suction pipe 13 is connected with a decorative grid (decorated grill) 16 installed on the installation opening 15 opening on the ceiling 5 . Depending on the size between the beam 3 and the ceiling 5 , the air suction port 11 provided on the box body 1 may directly face the installation port 15 of the ceiling 5 . At this time, of course, the suction duct 13 is omitted, and the decorative grill 16 is attached to the attachment port 15 .

The blowing pipe 14 is usually communicated with one or more ceiling air blowing outlets (not shown) provided on the ceiling 5 . That is, the heat-exchange air led out from the box 1 passes through the blowing duct 14 and is blown into the room from the above-mentioned ceiling air outlet, thereby air-conditioning the room. In addition, in the case of a large room, an appropriate number of ceiling air outlets are distributed according to the size to achieve uniform air conditioning in the room.

The air blower 8 housed in the above-mentioned machine room 7A is equipped with a not-shown two-shaft fan motor (fan motor) in the center, and the fan motor is a two-shaft motor with rotating shafts protruding from both sides thereof. Two fans (so-called multi-blade fans) 17 that suck in air from the axial direction and blow out to the circumferential direction are connected to each rotating shaft, and each fan 17 is enclosed by a fan casing. )18 around.

A blowing nozzle 18 a is formed at a side end portion of the partition plate 6 of the fan case 18 , and the blowing nozzle 18 a is connected to a communication port 19 opened in the partition plate 6 . Therefore, the communicating port 19 can direct the air blown by the fan 17 from the blowing nozzle 18a of the fan case 18 to the side of the heat exchanger chamber 7B described above.

The heat exchanger 9 housed in the heat exchanger chamber 7B has end plates (not shown) disposed on both ends thereof, and a plurality of aluminum fins (aluminum fins) are arranged in a row on these end plates with predetermined gaps therebetween. fin) 9a, the heat exchanger 9 is a fin-tube type (fin-tube type) heat exchanger formed by penetrating a plurality of heat transfer tubes 9b on both end plates and aluminum fins 9a. The heat exchanger 9 is mounted on the drain pan 10 in a vertically inclined posture, and both end plates are fixed to the case 1 via fixing plates not shown.

In view of the relationship that the box body 1 is installed on the back side T of the ceiling, it is necessary to shorten the vertical dimension of the box body 1 as much as possible to achieve thinning of the box body 1, so the vertical direction dimension of the heat exchanger 9 cannot be set as sufficient length. On the other hand, it is necessary to ensure the heat exchange area of the heat exchanger 9 as much as possible in order to improve the heat exchange efficiency. Therefore, by placing the heat exchanger 9 in an inclined posture, it can be housed in the thin case 1 while limiting the dimension in the vertical direction, and can ensure a sufficient heat exchange area.

The above-mentioned drain pan 10 is, for example, a molded product obtained by foaming a foamable synthetic resin material such as polystyrene resin (styrol resin), and its upper side is covered with acrylonitrile-butadiene-styrene resin (ABS resin). -butadiene-styrene resin) and other synthetic resin materials (coating). The dimensions of the drain pan 10 in the longitudinal direction X and the width direction Y are substantially the same as the dimensions of the heat exchanger chamber 7B in the longitudinal direction X and the width direction Y. Therefore, in a state where the drain pan 10 is attached to the heat exchanger chamber 7B, the drain pan 10 is fitted over the entire surface of the heat exchanger chamber 7B with almost no gap.

The above-mentioned drain pan 10 will be described in detail below. FIG. 3 is a perspective view of the drain pan 10 , and FIG. 4 is a plan view of the drain pan 10 .

Since the drain pan 10 is to be fitted in the heat exchanger chamber 7B, it is formed in a horizontally long rectangle whose longitudinal direction X is extremely short compared to the width direction Y of the housing 1 . Over the entire periphery of the drain pan 10, side wall portions 10a to 10d having uniformly raised dimensions are provided. That is, the dimensions of the side wall portions 10a to 10d forming the outer shape of the drain pan 10 from the bottom surface to the upper end surface are uniform along the entire periphery.

The bottom surface composed of the side wall parts 10a to 10d of the drain pan 10 includes: the receiving part 20, the primary side drain receiving part 21 and the secondary side drain receiving part 22 formed on both sides sandwiching the receiving part 20 , and the accommodating portion 23 formed on the sides of these carrying portion 20 and the primary and secondary side drain receiving portions 21 and 22 .

More specifically, as shown in FIG. 2 , in a state where the heat exchanger 9 is mounted on the mounting portion 20 , the mounting portion 20 is sandwiched between the mounting portion 20 and the upstream side of the heat exchange air flow path R to be described later. The secondary side drain receiving portion 21 is provided with a secondary side drain receiving portion 22 on the downstream side of the heat exchange air flow path R. As shown in FIG. The heat exchanger 9 is inclined from the mounting portion 20 toward the secondary side drain receiving portion 22 side, and a part of its lower side protrudes toward the primary side drain receiving portion 21 side.

Returning to Fig. 3 and Fig. 4, the above-mentioned supporting part 20 is arranged in parallel with the side wall parts 10a, 10b along the width direction Y at a predetermined interval, and is formed as required in order to carry the lower end obtuse angle part of the heat exchanger 9. The minimum width of . One end a of the receiving portion 20 is provided at a predetermined distance from the left side wall portion 10c via the housing portion 23, and the other end b is provided so as to be narrowly spaced from the right side wall portion 10d in the figure. Clearance. Along the upper surface of the mounting part 20 , a buffer material is attached as a straight embankment having a certain height dimension, which can support the heat exchanger 9 while reducing the mechanical load on the heat exchanger 9 .

The depth dimension of the primary side drain receiving portion 21 is equal to the distance from the upper end surface of each side wall portion 10c, 10b to the primary side drain receiving portion 21, and the depth dimension of the secondary side drain receiving portion 22 is equal to the distance from the upper end surface of each side wall portion 10c. , The distance from the upper surface of 10d to the secondary side drain receiving portion 22, and the depth dimension of the formed primary side drain receiving portion 21 is larger than the depth dimension of the secondary side drain receiving portion 22. In addition, the secondary side drain receiving portion 22 is formed obliquely, the deepest on the receiving portion 20 side, and gradually becomes shallower toward the side wall portion 10 a provided opposite to the receiving portion 20 in the longitudinal direction X.

In other words, the receiving portion 20 is provided along the deepest part of the secondary side drain receiving portion 22 . And as described above, even the deepest part of the secondary side drain receiving part 22 is shallower than the depth dimension of the primary side drain receiving part 21, so that the drain receiving part 22 from the receiving part 20 is formed There is a downward step.

On both sides in the width direction Y of such secondary side drain receiving portion 22 , first protrusions 25 and second protrusions 26 having different shapes protrude from each other. The first convex portion 25 is integrally formed by bending: a portion facing the end portion a of the receiving portion 20 at a predetermined interval and parallel to the left side wall portion 10c in the drawing; The parallel portion of the wall portion 10a; and an inverted L shape. The second convex portion 26 is opposed to the end portion b of the receiving portion 20 at a predetermined interval, and is provided linearly along the right side wall portion 10 a.

The intervals between the upper end surfaces of the first and second convex portions 25, 26 and the upper end surfaces of the side wall portions 10c, 10d are uniformly formed over the entire length. On the other hand, as described above, the secondary side drainage The receiving portion 22 has an inclined shape, and is deepest on the side of the supporting portion 20. Therefore, the formed first and second protrusions 25, 26 are highest on the side of the supporting portion 20, and face the sides opposite to each other in the longitudinal direction X. The wall portion 10a gradually becomes shallower.

Fig. 5 (A), 5 (B) are the side end portion 25a of the first protruding portion 25 and its vicinity, the perspective view seen from different directions, Fig. 6 (A), 6 (B) are the first 2 Perspective views of the side end portion 26a of the convex portion 26 and its vicinity viewed from different directions.

The side end portions 25a, 26a of the first and second protrusions 25, 26 face the end portions a, b of the receiving portion 20 with a predetermined gap therebetween, and form inclined surfaces inclined from the upper end surface to the bottom surface. A sealing member (sealing structure) d is attached to the upper surface of the first convex portion 25, and a sealing member d is also attached to at least the side end portion 26a of the second convex portion 26. The inclination angle of the inclined surfaces forming the side ends 25a, 26a is consistent with the inclination angle of the heat exchanger 9 carried on the carrier part 20, and the heat exchanger 9 abuts against the first and second protrusions through the sealing member d. On the side ends 25a, 26a of the parts 25, 26. In addition, the length dimension of the heat exchanger 9 in the Y direction is larger than the gap between the first and second protrusions 25 and 26 .

The secondary side drain receiving portion 22 communicates with one side of the primary side drain receiving portion 21 through a gap formed between the side end portion 25 a of the first convex portion 25 and the end portion a of the receiving portion 20 . The gap formed between these members is referred to as a first drainage channel 27 . In addition, the other side portion of the secondary side drain receiving portion 22 and the primary side drain receiving portion 21 is formed between the side end portion 26a of the second convex portion 26, the side wall portion 10a, and the end portion b of the receiving portion 20. connected by gaps. The gap formed between these members is referred to as a second drainage channel 28 .

In particular, as shown in FIG. 2 , in the state where the heat exchanger 9 is placed on the supporting portion 20 , since the heat exchanger 9 abuts against the side end portion 25 a of the first convex portion 25 , the first drain flow path The upper space of 27 becomes the pipeline that is blocked by heat exchanger 9. In addition, since the heat exchanger 9 is in contact with the inclined surface 26 a of the second convex portion 26 , the upper space of the second drain flow path 28 also becomes a channel blocked by the heat exchanger 9 .

However, the end a of the receiving portion 20 and the side end 25a of the first convex portion 25 are substantially on the same straight line, so that the first drainage channel 27 becomes a straight line extending in the Y direction. The end b of the receiving portion 20 is located at a distance from the side surface of the second convex portion 26 and the inner surface of the side wall 10b, so that the second drainage channel 28 becomes a wedge-shaped (L-shaped) pipe in plan view. road.

The accommodating part 23 surrounded by the said 1st convex part 25 and the left side wall 10c accommodates the drain pump, expansion valve, piping etc. which are not shown in figure. In a state where these components are accommodated in the housing portion 23, the housing portion 23 is similarly surrounded by a left fixing plate (not shown). That is to say, the above-mentioned left fixing plate is an inverted L-shaped sheet metal in a plan view, has a height dimension from the upper end surface of the first convex portion 25 to the inside of the ceiling of the box body 1, and is fixed on the left side of the box body 1. plate and the end plate of the heat exchanger 9.

The end surface of the left fixing plate on the heat exchanger 9 side is an inclined surface corresponding to the inclined posture of the heat exchanger 9 . By fixing the drain pan 10 to the case 1, the upper end surface of the first convex portion 25 and the lower end surface of the left fixing plate are brought into contact through the seal member d. The space of the accommodating part 23 and the secondary side space of the heat exchanger chamber 7B are partitioned off by this left fixed plate.

In addition, the right end plate of the heat exchanger 9 is fixed to the case 1 by a right fixing plate not shown. The primary side space and the secondary side space of the heat exchanger chamber 7B are separated by the above-mentioned left fixed plate, right fixed plate and the heat exchanger 9, and these spaces pass through the aluminum fins 9a of the heat exchanger 9 The gap between them communicates with the first and second drain passages 27 and 28 .

In the vicinity of the first and second drain channels 27 and 28 , drain ports 29 are respectively provided on the side wall parts 10c and 10d facing the width direction Y of the primary side drain receiving part 21 . On each drain port 29, a connection port body 30 protrudes outward from the side wall portion 10a to connect to a drain hose (not shown). That is, the drain accumulated in the primary side drain receiving portion 21 is drained from the left and right drain ports 29 through the connecting port body 30 and the drain hose.

Actually, after installing the box body 1 on a predetermined position on the back side T of the ceiling, conduct a test (test) to drop water onto the primary side drain receiving portion 21, and adjust the installation posture of the box body 1 so that the water flow to the side where the drain hose is connected. Depending on the situation, the drain hose is connected to the connection port body 30 on the side where more water flows, and the connection port body 30 on the less side is blocked with a plug.

As the indoor unit of the air conditioner constructed in this way, if the refrigerating cycle operation is performed and the blower 8 is driven, the indoor air passes through the decorative grid 16 and the air inlet 11 and flows along the heat exchange air flow path R formed in the casing 1. import. Specifically, the heat exchange air is sucked into the machine compartment 7A from the air intake port 11 , and introduced into the heat exchanger compartment 7B via the fan case 18 constituting the blower and the communicating port 19 provided in the partition plate 6 .

The heat exchange air is blown toward the heat exchanger 9 mounted on the drain pan 10 , flows over the entire length in the width direction Y, and exchanges heat with the cooling medium introduced into the heat exchanger 9 . The heat-exchanged air that has exchanged heat with the heat exchanger 9 is guided to the air outlet 12 and blown out into the room through the duct 14 to form an air-conditioning effect in the room.

In addition, looking at the flow of the heat exchange air in the drain pan 10, it first passes through the primary side drain receiving portion 21, then reaches the bearing portion 20, and then passes from the bearing portion 20 through the secondary side drain receiving portion 22 to the air outlet 12. blow out. Therefore, the heat exchange air passage R is formed in the order of the primary side drain receiving part 21 => the receiving part 20 => the secondary side drain receiving part 22 .

During the cooling operation, drain water is generated by the heat exchange action of the heat exchanger 9 and drips onto the drain pan 10 . On the other hand, the air blower 8 is driven to send heat exchange air along the heat exchange air flow path R. FIG.

Generally speaking, the drain formed on the heat exchanger 9 will drip along the heat exchanger 9 onto the primary side drain receiving portion 21, and the heat exchanger 9 carried on the drain pan 10 is as described above. Most of it is installed obliquely so as to face the secondary side drain receiving portion 22, the primary side drain receiving portion 21 is installed on the upstream side, and the secondary side drain receiving portion 22 is installed on the downstream side, therefore, if the air volume If there is a large amount of drainage or the amount of drainage generated is large, the amount of drainage dripping onto the secondary side drainage receiving portion 22 is larger than the amount of drainage dripping onto the primary side drainage receiving portion 21 .

The drain that has dripped onto the primary side drain receiving portion 21 is drained to the outside from the drain port 29 of the drain pan 10 via the connection port 30 and the drain hose. The drainage dripping onto the secondary side drainage receiving portion 22 flows in the direction of the bearing portion 20 located at the inclined lower end. The length of the width direction Y is substantially the same length, so the drainage is temporarily blocked by the bearing part 20 .

The drain trapped by the receiving unit 20 flows toward the first drainage channel 27 or the second drainage channel 28 provided at the left and right ends of the receiving unit 20 , and then flows through the drainage channels 27 , 28 . Since the drain channels 27 and 28 are formed along the left and right end portions a, b of the receiving portion 20, the drain is temporarily guided from the receiving portion 20 to flow to the outside.

However, since the first and second drain passages 27 and 28 communicate with the primary drain receiver 21 , the drain flows into the primary drain receiver 21 bypassing both ends a and b of the receiver 20 . In this way, the drain dripped onto the secondary side drain receiving portion 22 is collected into the primary side drain receiving portion 21 through the first drain flow path 27 and the second drain flow path 28, and from here passes through the drain port 29 and the drain. The hose vents to the outside.

Affected by the installation posture of the above-mentioned heat exchanger 9 and the wind pressure accompanying the air blowing of the blower 8, more drainage drips onto the secondary side drainage receiving part 22, but the present invention sets the secondary side drainage receiving part 22. The first and second drain passages 27 and 28 that communicate with the primary side drain receiving portion 22 and the primary side drain receiving portion 21. The first and second drainage passages 27 and 28 temporarily guide the drainage from the two side ends a and b of the receiving part 20 to flow out of the receiving part 20, and after bypassing the receiving part 20, they are introduced into the primary side drain receiving part 21. Can make drainage smoothly and reliably discharged.

On the other hand, the first drain flow path 27 is a straight line formed on the secondary side drain receiving portion 22 located on the downstream side of the receiving portion 20 together with the first convex portion 25, and extends in the width direction. Extending, its direction is perpendicular to the heat exchange air flow path R formed with the blowing action. Therefore, the air blown along the heat exchange air flow path R hardly passes through the first drain flow path 27 . The drainage flowing through the first drainage flow path 27 is hardly affected by the blowing air, so the drainage can flow smoothly through the first drainage flow path 27 . In addition, the pipeline of the second drainage flow path 28 is formed on the secondary side drainage receiving portion 22 located on the downstream side of the receiving portion 20 together with the second convex portion 26, and the end portion b along the receiving portion 20 is designed to form a The wedge shape (L-shape) therefore also makes it difficult for the heat exchange air guided along the heat exchange air flow path R to pass through.

In addition, it should be noted that the upstream side of the second drainage channel 27 is open along the side wall portion 10a formed on the side end of the drain pan 10, so the position of the opening makes the flow caused by the blowing effect of the blower 8 The heat exchange air is difficult to enter. Even if the heat exchange air invades the second drain flow path 28 from the primary side drain receiving portion 21, the side end portion 26a of the second convex portion 26 exists opposite to the intrusion direction, so the heat exchange air is received by the side end portion. 26a to prevent its intrusion into the secondary side.

The second drainage flow path 28 is further bent at a right angle and formed into a wedge shape along the end b of the receiving portion 20, so that the heat exchange air blocked at the side end portion 26a of the second convex portion 26 is hardly bent at a right angle and enters the inside thereof. . That is, the drainage flowing through the second drainage flow path 28 is less likely to be affected by the air blowing, so that the drainage flows smoothly through the second drainage flow path 28 .

Since the first and second drain passages 27 and 28 have such a structure, heat exchange air hardly blows from the primary side drain receiving part 21 to the secondary side drain receiving part via the respective drain passages 27 and 28. twenty two. In other words, this structure does not allow the air that has not passed through the heat exchanger 9 and thus has not undergone heat exchange to directly flow to the secondary side drain receiving part 22 through the first and second drain flow channels 27 and 28, thereby enabling heat exchange. Efficiency is improved.

In addition, no droplets are generated for the drainage that is guided from the secondary side drainage receiving portion 22 to the outlet 12 and the outlet duct 14 along with the heat exchange air. Get comfortable air conditioning.

In addition, the first drainage channel 27 is formed in a straight line, and the second drainage channel 28 is formed in a wedge shape. However, the present invention is not limited thereto. The drainage received by the side drain receiving part 22 temporarily flows out of the receiving part 20 from both sides of the receiving part 20, bypasses the receiving part 20, and then guides smoothly to the primary side drain receiving part 21, and the flow path does not follow the heat exchange. Air flow path R.

In addition, the present invention is not limited to the above-described embodiments, and can be modified without departing from the gist thereof, and various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments.

Claims (2)

1. An air conditioning device comprising: The box body has an air suction port and an air blowing port; A blower, which is housed in the box, is formed with a heat-exchange air flow path, wherein the heat-exchange air flow path sucks heat-exchange air into the box from the air inlet, and then blows it out from the air outlet; a heat exchanger located in said heat exchange air flow path; and a drain pan, which is arranged at the lower part of the heat exchanger and carries the heat exchanger; The drain pan includes: a bearing portion that supports the heat exchanger; a primary side drain receiving portion positioned upstream of the heat exchange air flow path and located on both sides of the bearing portion sandwiching the bearing portion; The secondary side drainage receiving part on the downstream side of the flow path; guides the drainage received by the secondary side drainage receiving part to temporarily flow out of the supporting part from both sides of the supporting part, and guides it after bypassing the supporting part The drainage channel of the primary side drainage receiving part. 2. The air conditioning device according to claim 1, wherein the drain pan has convex portions on both sides of the secondary side drain receiving portion; these convex portions and both sides of the receiving portion The drain flow path is formed in the gap between the upper part and the two side parts of the heat exchanger.

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