WO2008041738A1

WO2008041738A1 - Air conditioner

Info

Publication number: WO2008041738A1
Application number: PCT/JP2007/069429
Authority: WO
Inventors: Mikio Ito; Koji Kuchimura
Original assignee: Daikin Industries, Ltd.
Priority date: 2006-10-05
Filing date: 2007-10-04
Publication date: 2008-04-10
Also published as: CN101523123A; CN101523123B; JP2008095970A; JP4270261B2

Abstract

An air conditioner that, even if a drain passage for condensed water straddles a portion where condensation by cooling is not desired, can avoid cooling of the portion. The air conditioner has a rear heat exchanger (10b), a rear drain pan (70), and guide ribs (76a to 76c). The rear drain pan (70) has a vertical surface part (75), an upper drain pan (72), and a lower drain pan (77). The vertical surface part (75) is a member expanding generally vertically. The upper drain pan (72) extends from the upper end toward one side when viewed from the vertical surface part (75). The lower drain pan (77) extends from a low position toward the other side on the generally opposite side of one side of the vertical surface part (75). The rear drain pan (70) is obliquely disposed so that condensed water generated in the rear heat exchanger (10b) is received by the upper drain pan (72), led over the vertical surface part (75), and guided to an outlet (80) through the lower drain pan (77). The guide ribs (76a to 76c) are formed so as to extend from near the upper end of the vertical surface part (75) toward the other side.

Description

Specification

Air conditioner

Technical field

The present invention relates to an air conditioner that discharges condensed water generated in a heat exchanger.

Background art

Conventionally, in an air conditioner, indoor air is heat-exchanged by a heat exchanger during cooling operation or dehumidifying operation, and moisture in the air is condensed on the surface of the heat exchanger to generate condensed water. The water is drained through the drainage mechanism.

In this case, the condensed water condensed on the surface of the heat exchanger is water generated by cooling the moisture in the air, and thus the temperature is low. For this reason, in the middle of guiding such cold condensate to the drain, the flowing part may be cooled by the cold condensate, and secondary condensation may occur in the cooled part.

On the other hand, for example, in the air conditioning apparatus described in Patent Document 1 shown below, the drainage mechanism does not want to cause condensation due to cooling! /, And the part and the part where the condensed water flows! / An air conditioner that drains water while avoiding secondary condensation has been devised by providing a space in between.

Patent Document 1: JP-A-9 96423

Disclosure of the invention

Problems to be solved by the invention

[0003] However, in the air conditioner described in Patent Document 1 described above, for example, when a portion where it is not desired to cause condensation due to cooling is long and large, it is necessary to provide a space corresponding to that. The structure for providing a large space may become a large-scale structure, or the number of parts may increase and the manufacturing cost may increase.

In the air conditioner described in Patent Document 1, the space provided to prevent secondary condensation is a structure provided along the flow through which condensed water is guided, that is, a portion where it is not desired to cause condensation. It is the structure provided along. For this reason, in the case of a structure in which cold condensate is flowed across a portion where condensation is not desired to occur, the same applies. Such a technique cannot be applied, and it is difficult to suppress the cooling of the part. The present invention has been made in view of the above points, and the problem of the present invention is that the condensed water discharge path avoids condensation due to cooling! Even if it is a case, it is providing the air conditioning apparatus which can avoid the cooling of the said part. Means for solving the problem

An air conditioner according to a first aspect of the present invention is an air conditioner that guides / discharges condensed water generated by heat exchange to a discharge port, and includes a heat exchanger, a guide portion, and a rib. . The guide part has a predetermined vertical member, a high guide part, and a low guide part. This predetermined vertical member is a member spreading substantially vertically. The high guide portion extends from the upper end toward one direction as viewed from the predetermined vertical member. The low guide portion extends a lower position force than the high guide portion toward the other direction side substantially opposite to the one direction side of the predetermined vertical member. The guide portion is inclined so that the condensed water generated in the heat exchanger is received on the high guide portion side and is guided to the discharge port through the low guide across the predetermined vertical member. The rib is provided so as to extend from the vicinity of the upper end of the predetermined lead straight member toward the other direction.

Here, the condensed water generated by cooling by heat exchange in the heat exchanger is received on the high guide portion side and extends from the vicinity of the upper end of the predetermined vertical member toward the downstream side of the flow of the condensed water. By traveling along the upper surface of the rib, it can flow over the low guide part with a predetermined vertical member again! For this reason, the condensed water produced in the heat exchanger is guided to the drain outlet.

Therefore, the condensed water generated in the heat exchanger can be drained without directly touching the predetermined vertical member that does not travel through the high vertical guide portion, and the predetermined vertical member can be prevented from cooling. it can.

This makes it possible to avoid cooling the predetermined vertical member even when the condensed water discharge path has a structure that covers the predetermined vertical member where it is desired to avoid condensation due to cooling. In addition, it is possible to suppress secondary condensation that occurs when the predetermined vertical member is cooled.

Even if the condensed water is transmitted from the high guide portion toward the predetermined vertical member due to the surface tension, if the rib can be prevented by extending toward the downstream side of the condensed water flow, the condensed water It is guided to the tip of the rib and does not return to the predetermined vertical member side. This allows condensed water Since it flows down so as to be separated from the predetermined vertical member force, it is possible to more reliably avoid contact between the cold condensed water and the predetermined vertical member.

[0005] An air conditioner according to a second aspect of the present invention is the air conditioner according to the first aspect of the present invention, having a portion inclined downward in the other direction on the other direction side.

Here, since the other direction side of the rib is inclined downward in the other direction side, it is possible to prevent the flow of condensed water from flowing back through the upper surface of the rib and then back to the predetermined vertical member.

Thereby, it becomes possible to avoid cooling the predetermined vertical member more reliably.

[0006] An air conditioner according to a third invention is the air conditioner according to the first invention or the second invention, wherein the rib includes a first rib and a second rib that are provided apart from each other. Yes. The second rib is disposed below the first rib and in the other direction. The first rib and the second rib are positioned so that at least a part thereof overlaps when viewed from above.

Here, since the first rib and the second rib are arranged apart from each other, even if the first rib is cooled by the condensed water being transmitted on the first rib, the condensed water is Go to the second rib located at a distance. As a result, the portion cooled by the condensed water can be separated from the predetermined vertical member as much as possible. Further, even if secondary condensation occurs on the back side of the first rib due to the cooling of the first rib, the condensed water generated by this secondary condensation touches the predetermined vertical member. It is possible to guide the second vertical rib from the other direction side of the first rib along the back surface of the first rib without fail, and more reliably avoid cooling of the predetermined vertical member.

The invention's effect

[0007] In the air conditioner according to the first aspect of the present invention, the predetermined vertical member is cooled even when the drainage path of the condensed water has a structure straddling the predetermined vertical member where it is desired to avoid condensation due to cooling. It is possible to avoid this, and it is possible to suppress secondary condensation caused by cooling the predetermined vertical member.

In the air conditioner of the second aspect of the invention, it is possible to prevent the flow of condensed water from flowing back through the upper surface of the rib and then back to the predetermined vertical member, and more reliably avoid cooling the predetermined vertical member. It becomes possible. In the air conditioner of the third invention, the part cooled by the condensed water can be separated from the predetermined vertical member as much as possible. In addition, even if secondary condensation occurs on the back side of the first rib, the second rib extends from the other direction side of the first rib along the back side of the first rib without touching the predetermined vertical member. As a result, cooling of the predetermined vertical member can be avoided more reliably.

Brief Description of Drawings

FIG. 1 is an external view of an air conditioner in which a first embodiment of the present invention is adopted.

FIG. 2 is a configuration diagram of a refrigerant circuit.

FIG. 3 is a schematic perspective view of an indoor unit.

FIG. 4 is a perspective view showing the internal configuration of the indoor unit.

FIG. 5 is a right side sectional view of the indoor unit.

FIG. 6 is a right side sectional view of the rear frame.

FIG. 7 is a top view of the rear frame.

FIG. 8 is a front view of the rear frame.

FIG. 9 is a rear view of the rear frame.

FIG. 10 is a rear view showing a state in which a heat insulating material is attached to the rear frame.

FIG. 11 is a diagram showing a detailed structure near the guide rib of the rear frame.

Explanation of symbols

[0009] 1 Indoor unit

2 Outdoor unit

10b Rear heat exchanger (heat exchanger)

72 Upper drain pan (high guide section)

73 Upper rib

74 Upper bottom

75 Vertical surface (specified vertical member)

76a to 76c 1st guide rib to 3rd guide rib (1st rib to 3rd rib)

77 Lower drain pan (low guide part)

80 Drain port 100 air conditioner

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of an air conditioner according to the present invention will be described with reference to the drawings.

An air conditioner 100 in which an embodiment of the present invention is employed includes an indoor unit 1 installed on an indoor wall surface and an outdoor unit 2 installed outside the room.

A heat exchanger is accommodated in each of the indoor unit 1 and the outdoor unit 2, and a refrigerant circuit is configured by connecting the heat exchangers through the refrigerant pipe 5.

The configuration of the refrigerant circuit of the air conditioner 100 is shown in FIG.

This refrigerant circuit mainly includes an indoor heat exchanger 10, an accumulator 21, a compressor 22, a four-way switching valve 23, an outdoor heat exchanger 20, and an expansion valve 24.

[0011] The indoor heat exchanger 10 provided in the indoor unit 1 exchanges heat with the air in contact therewith. Here, as shown in FIG. 5, the indoor heat exchanger 10 is configured by a front heat exchanger 10f disposed in front of the indoor unit 1 and a rear heat exchanger 10b disposed rearward. Below the front lower end of the front heat exchanger 10f, a front drain pan 60 that captures condensed water in the air generated in the front heat exchanger 10f is provided. A rear drain pan 70 is provided below the rear lower end portion of the rear heat exchanger 10b to catch the condensed water in the air generated in the rear heat exchanger 10b. In addition, the indoor unit 1 is provided with a cross flow fan 11 for sucking indoor air and passing the air through the indoor heat exchanger 10 to discharge the air into the room. The cross flow fan 11 is rotationally driven by one indoor fan motor 12 provided in the indoor unit 1. As shown in FIGS. 2, 4 and 5 which are side views of the indoor unit 1, the cross flow fan 11 is disposed in the indoor unit casing 4, and the indoor unit casing 4 has a suction port 42 on the front side. It is provided in the upper part and the outlet 49 is provided in the lower part. As shown in FIGS. 3 and 5, the indoor unit casing 4 is provided with a front panel 41 on the front side and a mounting plate 43 on the back side. Front heat exchanger located inside the front panel 41 1 A forward drain pan 60 is provided below Of, as shown in FIGS. The front drain pan 60 has a water receiving portion 61 extending in the longitudinal direction of the indoor unit 1 and a groove portion 62 partially penetrating in the front-rear direction in the vicinity of the approximate center in the longitudinal direction. Inside the installation plate 43, as shown in FIGS. 5 and 6, a rear frame 50 that supports the rear heat exchanger 10b, the rotating shaft portion of the cross flow fan 11, and the like is disposed. As shown in FIG. 10, a heat insulating material 90 is partially adhered to the lower side of the back surface of the back frame 50. The front heat exchanger 10f and the rear heat exchanger 10b of the indoor heat exchanger 10 are positioned between the suction port in the indoor unit casing 4 and are bent at multiple stages so as to surround the cross flow fan 11. Is arranged. When the cross-flow fan 11 is driven to rotate, the indoor unit 1 takes in indoor air through the indoor heat exchanger 10 and returns the conditioned air that has undergone heat exchange to the room again, thereby air-conditioning the target space. .

[0012] The outdoor unit 2 includes a compressor 22, a four-way switching valve 23 connected to the discharge side of the compressor 22, an accumulator 21 connected to the suction side of the compressor 22, and a four-way switching valve. An outdoor heat exchanger 20 connected to 23 and an expansion valve 24 connected to the outdoor heat exchanger 20 are provided. The expansion valve 24 is connected to a pipe via a liquid closing valve 26, and is connected to one end of the indoor heat exchanger 10 via this pipe. The four-way selector valve 23 is connected to a pipe via a gas shut-off valve 27, and is connected to the other end of the indoor heat exchanger 10 via this pipe. Further, the outdoor unit 2 is provided with a propeller fan 28 for discharging the air after heat exchange in the outdoor heat exchanger 20 to the outside. The propeller fan 28 is rotationally driven by an outdoor fan motor 29.

Hereinafter, a drainage mechanism of condensed water generated by the rear heat exchanger 10b condensing moisture in the air will be described.

[0013] <Back frame 50>

As shown in FIG. 5, the rear frame 50 is disposed between the installation plate 43 of the indoor unit 1 and the rear heat exchanger 10b, and supports a fan support portion 53 that supports the cross flow fan 11 at the shaft portion (see FIG. 3). Drain the condensed water generated in the flap support 57 and flap bearing 58, which supports the flap 59 that allows the air flow from the outlet 49 to adjust the flow direction of the blowout air, and the rear heat exchanger 10b. It has a rear drain pan 70 (see Fig. 6 to Fig. 10) ).

Here, FIG. 6 shows a right side cross-sectional view of the back frame 50. As shown in FIG. Fig. 7 shows the top view from the top (direction shown by arrow A in Fig. 6), Fig. 8 shows the front view from the front (direction shown by arrow B in Fig. 6), and Fig. 6 Figure 9 shows the rear view as seen from the direction indicated by arrow C. FIG. 10 shows a state in which the heat insulating material 90 is attached in the rear view of the rear frame 50.

As shown in FIG. 11, the rear drain pan 70 of the rear frame 50 has a rear opening 71 for sending condensed water dripping from the rear heat exchanger 10b on the front side to the rear side, as shown in FIG. The upper drain pan 72, the lower drain pan 77, the vertical surface portion 75 and the guide rib 76, and the drainage port 80, which are provided so as to protrude to the rear side on the side, are provided by being molded. The vertical surface portion 75 is provided so as to connect one end of the upper drain pan 72 and one end of the lower drain pan 77. Note that FIG. 11 is a partially enlarged perspective view of a portion P surrounded by a one-dot chain line in FIG. 9 which is a rear view of the rear frame 50.

As shown in FIGS. 11 and 7 to 10, the rear opening 71 is used to cool the condensed water generated in the rear heat exchanger 10 b arranged on the front side of the rear frame 50, on the rear side of the rear frame 50. And is opened in a substantially vertical direction.

[0015] As shown in FIG. 9 and the like, the drainage port 80 is guided by guide ribs 76a to 76c through the condensed water 1S upper drain pan 72 guided to the rear side through the rear opening 71, and is guided to the vertical surface. This is an opening that crosses the section 75 and flows in the order of passing through the lower drain pan 77, and finally the condensed water is guided and drained. The drain port 80 is connected to a drain hose (not shown) so as to send condensed water from the room to the outside. In the following, in FIG. 11 and the like, the approximate left side (the direction in which the condensed water flows) is referred to as the “upstream side”, and the approximate right side (the direction in which the condensed water flows) in the drawing is the “downstream side” Will be described.

The upper drain pan 72 has an upper rib 73 that receives the condensed water falling through the rear opening 71 and guides it to the guide rib 76a, and an upper bottom portion 74. The upper ribs 73 are provided slightly above the upper bottom surface portion 74 so as to extend in parallel with each other in the longitudinal direction. The upper rib 73 and the upper bottom surface portion 74 of the upper drain pan 72 extend from the upstream side to the downstream side so that the condensed water can flow toward the lower drain pan 77 side. Slightly inclined (approximately 1 degree of inclination from the horizontal direction).

As shown in FIG. 11, the guide ribs 76a to 76c have a first guide rib 76a, a second guide rib 76b, and a third guide rib 76c. Each of the first to third guide ribs 76a to 76c has a horizontal portion extending in a substantially horizontal direction (inclination of about 1 degree from the horizontal direction) on the upstream side, and on the downstream side! It has a shape with a connecting force S and an inclined part inclined at approximately 45 degrees. The upstream end portion of the substantially horizontal portion of the first guide rib 76a is gently connected to the downstream end portion of the upper bottom surface portion 74 of the upper drain pan 72 at the same inclination angle. The second guide rib 76b is disposed on the lower downstream side as viewed from the first guide rib 76a, and does not overlap with each other in a side view, but in a top view, a part of the inclined portion of the first guide rib 76a and the horizontal direction of the second guide rib 76b. It is located so that a part of part may mutually overlap. Similarly, the third guide rib 76c is arranged on the lower downstream side as viewed from the second guide rib 76b, and in a side view! /, It must overlap with each other! /, But in a top view! / A part of the inclined portion of the second guide rib 76b and a part of the horizontal portion of the third guide rib 76c are positioned so as to overlap each other.

[0017] The lower drain pan 77 is located below the guide ribs 76a to 76c. The vertical surface portion 75 described above connects the upstream side end portion of the lower drain pan 77 and the downstream side end portion of the upper drain pan 72 (upper bottom surface portion 74) by a surface extending in the vertical direction. The lower drain pan 77 is also slightly inclined from the upstream side to the downstream side (inclination of about 1 degree from the horizontal direction) in order to guide the condensed water to the drain port 80.

As shown in FIG. 10, a heat insulating material 90 is in close contact with the lower drain pan 77 of the rear frame 50. This allows cold condensate to flow along the lower drain pan 77 and lead it to the drain, even if the lower drain pan 77 is cooled, The ability to recognize that moisture in the air condenses and causes secondary condensate to adhere.

[0018] <Condensate drainage route>

The cooled condensed water generated by condensing the rear heat exchanger 10b is guided to the back side of the back frame 50 through the back opening 71 of the back frame 50 described above.

The cooled condensate led to the back side is the upper drain pan 72 (mainly the upper rib 73). Is received and guided to the horizontal portion of the first guide rib 76a.

The cooled condensed water led to the horizontal portion of the first guide rib 76a travels along the inclined portion of the first guide rib 76a and drip from the downstream end of the first guide rib 76a toward the horizontal portion of the second guide rib 76b. drop down. Condensed water that has dripped onto the horizontal portion of the second guide rib 76b travels along the inclined portion of the second guide rib 76c and then drops from the downstream end of the second guide rib 76b toward the horizontal portion of the third guide rib 76c. Condensed water that has dripped onto the horizontal portion of the third guide rib 76c travels along the inclined portion of the third guide rib 76c and then drops toward the lower drain pan 77 from the downstream end of the third guide rib 76c.

The condensed water dripping into the lower drain pan 77 is guided to the drain outlet 80 along the slight inclination of the lower drain pan 77.

Thus, since the cold condensate does not travel through the vertical surface portion 75, the vertical surface portion 75 is not cooled. Thus, moisture in the air does not condense and adhere on the surface of the vertical surface portion 75 opposite to the side where the guide ribs 76a to 76c through which the condensed water flows are provided.

Further, since the cold condensed water flows along the upper rib 73 of the upper drain pan 72 and does not flow so much through the upper bottom surface portion 74, the upper bottom surface portion 74 is hardly cooled. As a result, it is difficult for moisture in the air to condense and adhere to the lower surface of the upper bottom surface 74.

Yes

(1)

In the air conditioner 100 of the present embodiment, as described above, the heat insulating material 90 is a portion of the upper drain pan 72 opposite to the side where the condensed water flows, and the condensed water flows to the vertical surface portion 75. On the side opposite to the side, there is no particular provision. This is because in the upper drain pan 72, the cooled condensed water flows mainly along the upper rib 73, not in the upper bottom surface portion 74. For this reason, the upper bottom surface portion 74 has a cold condensate that is transmitted to it and is not easily cooled. Therefore, moisture in the air is condensed on the lower surface side of the upper drain pan 72 (upper bottom surface portion 74). This is because the next condensed water does not adhere. Further, in the vertical surface portion 75, the cooled condensed water flows down along the vertical surface portion 75. Instead, it flows down mainly along the guide ribs 76a to 76c. For this reason, since the condensed water that has been cooled is transmitted to the vertical surface portion 75 and is not easily cooled, moisture in the air is present on the back surface side of the vertical surface portion 75 (the side opposite to the side through which the condensed water flows). This is because condensation does not occur and secondary condensed water does not adhere.

Therefore, it is not necessary to provide the above-described heat insulating material 90 so as to be in pressure contact with the vertical surface portion 75 and the upper bottom surface portion 74 of the upper drain pan 72. For this reason, the amount of necessary heat insulating material 90 can be suppressed to a small extent, and the air conditioner 100 can be manufactured at a low cost.

Even if the force from the upper drain pan 72 is transmitted to the vertical surface portion 75 due to the surface tension of the condensed water, the guide ribs 76a to 76c extend and lead toward the downstream side of the condensed water flow. However, it can be prevented from being transmitted to the vertical surface portion 75 side. As a result, contact between the cold condensate and the vertical surface portion 75 can be avoided more reliably.

(2)

Since the air conditioner 100 of the present embodiment has a portion inclined downward from the guide ribs 76a to 76c, after flowing through the upper surface of the guide ribs 76a to 76c, it returns to the vertical surface portion 75 along the back surface. Can prevent the flow of condensed water. Thereby, cooling of the vertical surface part 75 can be avoided more reliably.

[0021] (3)

In the air conditioner 100 of the present embodiment, the guide ribs 76a to 76c are arranged away from each other. For example, even if the first guide rib 76a is cooled by the condensed water being transmitted on the first guide rib 76a. Then, the condensed water is transferred to the second guide rib 76b located at a position distant from the downstream side. As a result, the portion cooled by the condensed water can be separated from the vertical surface portion 75 as much as possible. Furthermore, even if secondary condensation occurs on the back side of the first guide rib 76a due to the cooling of the first guide rib 76a, the condensed water generated by this secondary condensation touches the vertical surface portion 75. Then, the second guide rib 76b is guided from the downstream side of the first guide rib 76a along the back surface of the first guide rib 76a, and cooling of the vertical surface portion 75 can be avoided more reliably.

[0022] <Modification>

Although the present invention has been described above, the specific configuration is limited to the above embodiment. However, changes can be made without departing from the scope of the invention.

(A)

In the air conditioner 100 according to the first embodiment described above, as the vertical surface portion 75, a surface member extending in a substantially vertical direction is taken as an example.

However, the present invention is not limited to this. For example, the vertical surface portion 75 may be configured to be slightly inclined toward the downstream side from the upper end to the lower end, or may be configured to be slightly inclined toward the upstream side. Anyway.

(B)

In the air conditioner 100 according to the first embodiment described above, the insulating material is provided on the back side of the vertical surface portion 75 (condensed water does not flow! /, Side) and the back side of the upper drain pan 72 (condensed water does not flow! /, Side). 90 is provided! /, Na! /, In some cases! /

However, the present invention is not limited to this. For example, this position, that is, the back side of the vertical surface 75 (condensed water does not flow! /, Side) and the back side of the upper drain pan 72 (condensed water flows). N! /, The side) is also provided with a thermal insulation 90 extending! In this case, it is possible to prevent secondary condensation from occurring.

Industrial applicability

[0024] By using the present invention, the condensed water discharge path avoids condensation due to cooling! /, Even when the structure spans parts, cooling of the parts can be avoided. Therefore, the present invention can be applied particularly to an air conditioner that guides and discharges condensed water generated by heat exchange to a discharge port.

Claims

The scope of the claims

[1] An air conditioner (100) for guiding condensed water generated by heat exchange to a discharge port (80) and discharging it.

A heat exchanger (10b),

A predetermined vertical member (75) spreading substantially vertically, a high guide portion (72, 73, 74) in which an upper end force extends in one direction as viewed from the predetermined vertical member (75) force, and the predetermined vertical member ( 75) having a low guide portion (77) extending from a position lower than the high guide portion (72, 73, 74) toward the other direction side substantially opposite to the one direction side, and the heat Condensate generated in the exchanger (10b) is received on the high guide portion (72, 73, 74) side, and the predetermined vertical member (75) is again passed through the low guide (77) through the low guide (77). A guide part (70) arranged to be inclined so as to be led to the outlet (80);

Ribs (76a, 76b, 76c) extending from the vicinity of the upper end of the predetermined vertical member (75) toward the other direction;

An air conditioner (100) comprising:

[2] The rib (76a, 76b, 76c) has a portion inclined downward in the other direction side on the other direction side.

The air conditioner (100) according to claim 1.

[3] The ribs (76a, 76b, 76c) are provided apart from each other, and are below the first direction (76a, 76b) and the other direction side as viewed from the first ribs (76a, 76b). And a second rib (76b, 76c),

The first ribs (76a, 76b) and the second ribs (76b, 76c) are positioned so that at least a part thereof overlaps when viewed from above.

The air conditioner (100) according to claim 1 or 2.