JP2005164074A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning system having a drain pan structure for improving comfort while preventing the discharge of drain water received by a drain pan from an air outlet. <P>SOLUTION: An unit body 1 is partitioned into a blow chamber A and a heat exchange chamber B with a partition plate 6. An air inlet 2 is provided on the side of the blow chamber and the air outlet 3 is provided on the side of the heat exchange chamber. A blower S is arranged in the blow chamber and a heat exchanger 5 is arranged in the heat exchange chamber, and a drain reservoir 7 is arranged at the lower part of the heat exchanger. At a bottom 7a of the drain reservoir, a first step portion X, a second step portion Y and a third step portion Z are continuously provided which is provided on the heat exchanged air delivery side of the heat exchanger, which is provided on the first step portion at the upstream side of heat exchanged air and on which the lower end of the heat exchanger is directly placed, and which is provided on the second step portion at the upstream side of the heat exchanged air, respectively. The second step portion is formed lower than the first step portion and higher than the third step portion. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air conditioner, for example, a ceiling-suspended indoor unit, in which a drain receiver that receives drain water dripped from a heat exchanger is improved.

In an air conditioner composed of an indoor unit and an outdoor unit, the ceiling does not protrude from the wall surface, unlike a so-called wall-mounted indoor unit, and is attached in close contact with the ceiling board so that it does not feel a sense of pressure. An air conditioner equipped with a suspended indoor unit is often used.
While this type of indoor unit is required to reduce the size in the thickness direction (height direction) of the unit main body, which is the housing, as much as possible and to have a shape with less pressure, the width direction (horizontal direction) ) Has relatively few dimensional constraints. Therefore, the efficiency of the heat exchange action is improved by blowing out heat exchange air from a wide range along the ceiling surface.

The indoor heat exchanger used here has a unit main body from the blower side, for example, as shown in [Patent Publication 1] in order to secure a necessary heat exchange area and to regulate the height dimension as much as possible. It inclines with the predetermined inclination angle toward the blower outlet side. And in order to receive the drain water dripped from an indoor heat exchanger with a refrigerating cycle driving | operation, the drain pan (drain receptacle) made from expanded polystyrene is installed in the lower part of the indoor heat exchanger.
JP-A-11-101462

In the above-mentioned [Patent Document 1], a drain pump is attached to the drain pan portion between the blower and the indoor heat exchanger, and the drain water collected in the drain pan is sucked up and discharged out of the air conditioner main body. It is supposed to be. Therefore, the cross-sectional shape of the drain pan bottom is gradually inclined so that the heat exchange air outlet side (secondary side) of the indoor heat exchanger is high and the drain pump mounting side which is the heat exchange air introduction side (primary side) is low. .
In recent years, the height of the unit body has been shortened as much as possible to make it thinner, so the inclination angle of the indoor heat exchanger has increased, while the drain pan bottom has changed from the secondary side to the primary side. The inclination angle over which it extends is formed smaller. For this reason, the drain water stays on the secondary side of the indoor heat exchanger under a situation where the amount of drain water generated is large.

  In the drain pan described above, there is a possibility that drain water staying on the secondary side is blown away by heat exchange air that passes through the indoor heat exchanger and is led to the secondary side. In this case, the water droplets of the drain water are mixed with the heat exchange air blown into the room from the air outlet provided in the secondary side direction, and the water drops are scattered in the room and the comfort is impaired.

  The present invention has been made paying attention to the above circumstances, and its object is to provide a drain receiving structure in which drain water is not blown out from the outlet, and to achieve air conditioning that improves comfort. The device is to be provided.

  The present invention has been made to satisfy the above-mentioned object, and the unit body is partitioned into a blower chamber and a heat exchange chamber by a partition plate, and has a suction port on the blower chamber side, and is blown out to the heat exchange chamber side. The air blower is equipped with a blower, and heat blowing air is sucked into the blower chamber through the partition plate and blown into the heat exchange chamber through the partition plate and blown into the room through the blower outlet, and the heat blown from the blower into the heat exchange chamber A heat exchanger that exchanges heat when the exchange air is conducted is arranged, and a drain receiver that receives drain water generated by the refrigeration cycle operation is arranged at a lower part of the heat exchanger, and the bottom of the drain receiver is A first stage provided on the heat exchange air outlet side of the heat exchanger, and a second stage provided on the heat exchange air upstream side of the first stage and directly mounted on the lower end of the heat exchanger And the heat exchange air upstream of this second step Is constituted by a third stepped portion provided with the second stepped portion has a first step portion lower than higher is than the third stepped portion.

  ADVANTAGE OF THE INVENTION According to this invention, the drain receiving structure where drain water is not blown from a blower outlet is comprised, and there exists an effect of obtaining the improvement of comfort.

Hereinafter, embodiments of an air-conditioning apparatus according to the present invention will be described with reference to the drawings.
1 is an overall perspective view of an indoor unit constituting an air conditioner, FIG. 2 is a cross-sectional view of the indoor unit, FIG. 3 is a bottom view showing the internal structure of the indoor unit, and FIG. 4 is an exploded perspective view of the indoor unit. 5 is a cross-sectional view of one side of the indoor unit.

In the figure, reference numeral 1 denotes a unit main body, which is attached to a ceiling bolt that is hung from a ceiling bolt (not shown) and in close proximity to the ceiling surface. One feature of the unit main body 1 is that the dimension in the width direction (horizontal direction) is extremely large compared to the dimension in the thickness direction (height direction).
The unit main body 1 includes a bottom plate portion 1a constituting the lower surface, a top plate portion 1b constituting the upper surface close to the ceiling in a suspended state, and a pair of left and right connecting the bottom plate portion 1a and the top plate portion 1b. It is comprised from the side-plate part 1c and the back surface part 1d. Only the side plate portion 1c is covered with the side cover 1e.

The bottom plate portion 1a is provided with a suction port 2 into which the grill 10 and the filter 11 are detachably fitted along the width direction at a position approximately half of the front-rear direction perpendicular to the width direction of the bottom plate portion 1a. The front part opposite to the rear part 1d is a blowout port 3 to which a horizontal louver 13 is attached so as to be openable and closable. A vertical louver 12 is rotatable at the back of the horizontal louver 13 at the blowout port 3. Installed on.
A partition plate 6 is provided inside the unit body 1. The partition plate 6 is erected along one side edge of the suction port 2 into which the grill 10 described above is fitted, and extends so as to contact the top plate portion 1 b of the unit body 1. Further, the partition plate 6 extends so as to contact the left and right side plate portions 1c constituting the unit main body 1, so that the inside of the unit main body 1 is partitioned into two chambers A and B by the partition plate 6 in the front-rear direction. become.

The inside of the unit main body 1 has a blower chamber A in which an air blower S and an electric component box 15 for driving and controlling the blower S are arranged and housed on the suction port 2 side with the partition plate 6 interposed therebetween, and indoor heat on the blower outlet 3 side. A heat exchange chamber B in which the exchanger 5 is accommodated is formed.
The blower device S includes a fan motor 16 that is a so-called biaxial motor that is fixedly supported by a motor fixing device 19 that is attached to the top plate portion 1b, and in which a rotating shaft 18 projects from both side surfaces. Actually, a connecting shaft is integrally connected to one rotary shaft 18 via a coupling (not shown) to form a long shape. The blower S includes a blower fan 4 fitted to each rotary shaft 18 of the fan motor 16 and a fan case 14 that surrounds the blower fan 4 except for the axial direction.

The fan motor 16 is disposed at a position shifted in one direction from the longitudinal center of the unit body 1, and one blower fan 4 is attached to one rotating shaft 18 protruding from one side surface. A plurality of (three in this case) blower fans 4 are attached to a long rotating shaft 18 that protrudes from the other side surface of the fan motor 16 and is actually connected to a connecting shaft.
The blower fan 4 uses a so-called multi-blade fan, and is of a type that blows air sucked in from the axial direction in the circumferential direction as it rotates. The long rotating shaft 18 to which the connecting shaft is connected is supported by a bearing 17. The bearing member 17 is attached to the top plate portion 1b via the bearing fixing device 20. Therefore, when the unit main body 1 is attached to a predetermined part, the fan motor 16 and the motor fixing device 19, and the bearing member 17 and the bearing fixing device 20 are suspended from the top plate portion 1b.

Both sides of the fan case 14 are provided with openings through which the rotary shaft 18 penetrates and both sides of the blower fan 4 are exposed, and form a suction port body n of the blower fan 4. A blow-off port body m, which is an opening having a rectangular cross section, is integrally projected on the peripheral surface of the fan case 14 and is fitted into an opening having the same shape provided in the partition plate 6 so as to protrude toward the heat exchange chamber B. .
In the heat exchange chamber B, the indoor heat exchanger 5 and a drain receiver 7 described later are disposed below the indoor heat exchanger 5. In particular, as shown in FIG. 2, the indoor heat exchanger 5 is disposed obliquely in a state of being extremely inclined toward the outlet 3 because the unit body 1 is formed with the vertical dimension shortened as much as possible. Is done.

The indoor heat exchanger 5 includes end plates 5b at both ends, a plurality of fins 5a arranged in parallel with a narrow gap between the both end plates 5b, and the end plates 5b and fins. It is comprised from the heat exchange pipe 5c provided by penetrating 5a. A material having excellent heat transfer characteristics is selected for the end plate 5b, the fin 5a, and the heat exchange pipe 5c, and the end plate 5b and the fin 5a are in close contact with the heat exchange pipe 5c.
The upper end edges of the end plate 5b and the fin 5a are aligned at the same position, and one of the features is that the lower end edge of the end plate 5b is formed higher than the lower end edge of the fin 5a. In other words, the side view of the indoor heat exchanger 5 is covered with the end plate 5b, but only the lower end portion of the fin 5a is exposed from the end plate 5b.

  The heat exchange pipes 5c are provided in a plurality of rows at a predetermined pitch along the longitudinal direction of the fins 5a and across the width direction of the fins 5a. One feature is that the heat exchange pipes 5c in the adjacent rows are provided with different height positions so that they do not completely coincide with each other in the horizontal direction.

The drain receiver 7 is formed of, for example, a thick synthetic resin material, and receives heat from the slanted indoor heat exchanger 5 so as to receive all the drain water droplets that are generated and dripped in the refrigeration cycle operation. It is formed in an area that occupies almost the entire bottom surface of the exchange chamber B.
The drain receiver 7 includes a bottom portion 7a on which the lower end portion of the indoor heat exchanger 5 is directly mounted, and a front wall portion 7b that projects integrally on the side adjacent to the outlet 3 that is the front side of the bottom portion 7a. The rear wall portion 7c is integrally projected on the back side of the bottom portion 7a, and the front wall portion 7b and the rear wall portion 7c are connected to each other, and the side wall portion 7d is integrally projected on both sides of the bottom portion 7a. Ruru. In other words, the wall portions 7b to 7d project along the front, rear, left and right peripheral portions of the bottom portion 7a, and the drain receiver 7 has a cross-sectional dish shape (concave shape).

While the front wall portion 7b and the side wall portions 7d and the rear wall portion 7c have the same upper end surface and are formed to be substantially horizontal, the height (depth) dimension is determined from the sectional shape of the bottom portion 7a described later. Different from each other. That is, one of the features is that the drain receiving bottom portion 7a is formed in a step shape from the front wall portion 7b side to the rear wall portion 7c in the front-rear direction.
The drain receiving bottom portion 7a will be further described. The front wall portion 7b side is the highest stepped first step portion X, and is adjacent to the first step portion X and is one step lower than the first step portion X. The second step portion Y is formed, and further, a third step portion Z is formed adjacent to the second step portion Y and formed one step lower than the second step portion Y on the rear wall portion 7c side. When the second step portion Y at the center is taken as a reference, the second step portion Y is formed lower than the first step portion X and higher than the third step portion Z.

As described above, the first, second, and third step portions X, Y, and Z are stepped, but each step portion is inclined downward in the front-rear direction. The drain water dropped directly on X, Y, and Z is smoothly guided to the rear wall portion 7d that is in the inclined direction.
That is, the drain water dropped onto the first step X is automatically guided to the second step Y, the drain water dropped onto the second step Y, and the drain water dropped onto the first step X. Is led to the third step Z. Finally, all the drain water dripped onto the drain receiver 7 flows into the third step portion Z.

The lower end portion of the indoor heat exchanger 5 is placed on the second step portion Y. As described above, the indoor heat exchanger 5 includes a plurality of fins 5a arranged side by side with a narrow gap therebetween, and end plates 5b on both sides of the fins 5a. The lower end edge of 5b is formed higher than the lower end edge of the fin 5a. For this reason, the lower end edge of the fin 5a is directly placed on the second step portion Y, and the lower end edge of the end plate 5b has a certain gap with the second step portion Y.
A drain pump is attached to the bottom step 7a of the drain receiver 7 at the third step portion Z which is the rear end, and drain water collected in the drain receiver 7 is connected to the drain receiver 7 (both (Not shown).

An upper heat insulating material 8 that supports the upper end of the indoor heat exchanger 5 is provided at the upper part of the heat exchange chamber B, and the heat generated by the refrigeration cycle action of the indoor heat exchanger 5 (warm / cold) is generated by the unit body 1. In the same manner as the drain receiver 7, it is formed from a thick heat insulating material so as not to be transmitted to the top plate portion 1 b that forms the shape.
In particular, as shown in FIGS. 4 and 5, a side heat insulating material 9 is installed between both side wall portions 7 d forming both side portions of the drain receiver 7 and both side portions of the upper heat insulating material 8. The upper end surface of the side heat insulating material 9 is in close contact with the upper heat insulating material 8, and the lower end surface of the side heat insulating material 9 is in close contact with the upper end surface of the drain receiving side wall portion 7e.

  In other words, the side heat insulating material 9 is integrally attached to the inner surface of the side plate portion 1c constituting the unit main body 1. The lower end portion of the side plate portion 1c is bent in the horizontal direction, and is a fitting portion 21 that is bent downward in the vertical direction from the horizontal bent portion 21a. As individual parts prior to the assembled state as shown in FIG. 5, the lower end portion of the side heat insulating material 9 is slightly (2) as shown by the two-dot chain line in the figure than the bent portion 21a at the lower end of the side plate portion 1c. It protrudes downward (about ~ 3mm).

In assembling, the outer side surface of the side wall portion 7d of the drain receiver 7 is fitted into the fitting portion 21 at the lower end of the side plate portion 1c. In particular, as shown in FIG. 2, the fitting portion 21 is also provided at the lower end portion of the partition plate 6, and the rear wall portion 7 c of the drain receiver 7 is fitted therein.
As shown in FIG. 5 again, the lower end portion of the side heat insulating material 9 rests on the upper end surface of the drain receiving side wall portion 7d, and the portion protruding from the bent portion 21a is compressed and elastically deformed. Accordingly, the drain receiver 7 and the side heat insulating material 9 are in close contact with each other. Since the side heat insulating material 9 and the upper heat insulating material 8 are also in close contact with each other, the heat exchange air does not leak between them.

  When the assembly of all the components is completed, the product is installed, the refrigeration cycle operation is performed, and the blower S is driven, the room air is sucked from the suction port 2 and is heated via the blower chamber A and the partition plate 6. Sprayed to the indoor heat exchanger 5 in the exchange chamber B. The room air exchanges heat when passing through the indoor heat exchanger 5, and is guided to the vertical louver 12 and the horizontal louver 13 and blown into the room from the outlet 3. From this, an indoor cooling action or heating action can be obtained.

With the refrigeration cycle operation, drain water is generated in the indoor heat exchanger 5 and drops to the drain receiver 7 as water droplets. The drain receiver 7 is formed so as to occupy almost the entire area of the heat exchange chamber B, and the indoor heat exchanger 5 is mounted on the drain receiver bottom portion 7a, so that all drain water is reliably transferred to the drain receiver 7. I can receive it.
The drain receiver 7 is surrounded by the front wall portion 7b, the rear wall portion 7c, and both side wall portions 7d around the bottom portion 7a. Since the drain receiver 7 is formed in a concave shape in cross section, the amount of drain water generated is extremely high. Even if it increases, the drain water does not overflow from the drain receiver 7.

  The drain receiving bottom 7a is formed from the first step X, the second step Y, and the third step Z from the front wall 7b to the rear wall 7c, and the step X Since .about.Z has a stepped shape that descends sequentially, all drain water dropped on the drain receiving bottom 7a surely flows into the third step Z.

  On the other hand, the air blower S is driven and the room air sucked from the suction port 2 is blown out to the heat exchange chamber B, and flows through the indoor heat exchanger 5. The indoor heat exchanger 5 is placed on the second step portion Y that forms the drain receiving bottom portion 7, and is inclined obliquely toward the first step portion X side. Since the 3rd step part Z is provided in the primary side which is the heat exchange air introduction side in the indoor heat exchanger 5, the drain water collected in this 3rd step part Z is carried on the flow of heat exchange air. There is no back flow toward the first step portion X which is the secondary side.

Since the drain water dripping from the indoor heat exchanger 5 to the first step portion X is immediately guided to the second step portion Y along the inclination, a little drain water is placed on the secondary side of the indoor heat exchanger 5. Therefore, the air does not accumulate and is not blown into the room from the air outlet 3 on the heat exchange air. By adopting the shape structure of the drain receiver 7, the comfort can be improved.
Since the lower end edge of the end plate 5b constituting the indoor heat exchanger 5 is formed higher than the lower end edge of the fin 5a and the lower end edge of the fin 5a is placed on the drain receiving bottom portion 7a, the lower end edge of the end plate 5b However, the water is hardly immersed in the drain water collected at the drain receiving bottom portion 7a, and does not cause corrosion.

  The heat exchange pipes 5c constituting the indoor heat exchanger 5 are provided in a plurality of rows across the width direction of the fins 5a so that the heat exchange pipes 5c in the adjacent rows do not completely coincide with each other in the horizontal direction. Since the positions are changed, the heat exchange action by the contact between the heat exchange air conducted through the indoor heat exchanger 5 and the heat exchange pipes 5c in each row is improved, and the heat transfer efficiency can be improved.

  Since the lower end portion of the side surface heat insulating material 9 projects in advance below the bent portion 21a at the lower end of the side plate portion 1c and is mounted on the upper end surface of the side wall portion 7e of the drain receiver 7, the bent portion of the side surface heat insulating material 9 is formed. The portion protruding from 21a is compressed and elastically deformed, and the drain receiver 7 and the side heat insulating material 9 are in close contact with each other. Therefore, heat exchange air does not leak from between the side heat insulating material 9 and the drain receiver 7, and a separate sealing material is not required and the sealing performance is reliably maintained.

Since the fitting portion 21 is integrally formed at the lower end portion of the side plate portion 1c and the partition plate 6 so that the both side wall portions 7d and the rear wall portion 7c of the drain receptacle 7 are fitted, the drain receptacle at the time of assembling work 7 can be easily and accurately positioned to improve workability.
The drain receiver 7 of the present invention is not limited to the above-described configuration, and various modifications can be made without departing from the spirit of the present invention, and the present invention includes all of these. .

The perspective view of the indoor unit which comprises the air conditioning apparatus based on one embodiment of this invention. Sectional drawing of the indoor unit based on the embodiment. The bottom view of the internal structure of the indoor unit based on the embodiment. The disassembled perspective view of the indoor unit based on the embodiment. Sectional drawing of a part of indoor unit based on the embodiment.

Explanation of symbols

  6 ... Partition plate, A ... Air blow chamber, B ... Heat exchange chamber, 2 ... Suction port, 3 ... Air outlet, 1 ... Unit body, S ... Air blower, 5 ... Indoor heat exchanger, 7 ... Drain receiver, 7a ... (Bottom of drain), X ... first step, Y ... second step, Z ... third step, 5b ... end plate, 5a ... fin, 5c ... heat exchange pipe.

Claims (2)

A unit body that is partitioned into a blower chamber and a heat exchange chamber by a partition plate, has a suction port on the blower chamber side, and has a blowout port on the heat exchange chamber side;
An air blower that is disposed in the air blowing chamber of the unit main body, sucks indoor air from the suction port, blows air to the heat exchange chamber through the partition plate, and blows air into the room from the blowout port;
A heat exchanger that is arranged in the heat exchange chamber of the unit main body and exchanges heat when the air blown from the blower device is conducted; and
In an air conditioner provided with a drain receiver that is disposed at a lower part of the heat exchanger and receives drain water generated in accordance with the refrigeration cycle operation,
The drain receiver has a bottom portion provided at a heat exchange air outlet side of the heat exchanger and a heat exchanger air upstream side of the first step portion, and a lower end of the heat exchanger. A second step portion on which the portion is directly placed and a third step portion provided on the heat exchange air upstream side of the second step portion, and the second step portion includes the first step portion. An air conditioner characterized in that the air conditioner is formed lower than the third step and higher than the third step. The heat exchanger is provided with end plates provided on both side end portions, a plurality of fins arranged side by side with a narrow gap between both side end plates, and through the end plates and fins. Heat exchange pipe
The air conditioner according to claim 1, wherein a lower end edge of the both side end plates is formed higher than a lower end edge of the fin.

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