JP4327680B2 - Indoor unit of separate air conditioner - Google Patents

Description

  The present invention relates to an indoor unit of a separation-type air conditioner, and is particularly suitable for an indoor unit of a separation-type air conditioner in which a pipe storage chamber is formed on the bottom rear surface.

  As a conventional indoor unit of a separation type air conditioner, there is one shown in Japanese Patent Laid-Open No. 9-243108 (Patent Document 1). The indoor unit of this separation type air conditioner houses a horizontally long cross-flow fan (fan for blowing) and a heat exchanger that constitutes a part of the refrigeration cycle in a housing (main body casing), and forwards downward from the cross-flow fan. A rear casing (filled casing) that extends in an arc shape so as to form a ventilation path is provided, and a piping storage chamber that extends to the left and right and opens to the rear side is formed at the bottom of the rear casing and connected to the heat exchanger. The auxiliary refrigerant pipe (auxiliary pipe) extending from one side to the middle of the pipe storage chamber is provided.

JP-A-9-243108

  In response to the times when power consumption (improvement of air conditioning performance) and resource saving (miniaturization) are strongly demanded, in recent years, a cross-flow fan and its ventilation path have been formed to increase the air volume of the air conditioner. The casings to be used are gradually becoming larger, and the thickness dimension of the indoor unit is gradually increased, and there is a concern that the occupant will feel pressure. In order to suppress this, it is becoming more important than ever to improve the loading efficiency by eliminating waste in the structural arrangement of the indoor units.

  However, in the indoor unit of Patent Document 1, no reference is made to the structure relating to the depth of the piping storage chamber, and particularly, with respect to the bent region portion of the refrigerant connection pipe that is led out from the auxiliary refrigerant pipe of the indoor unit to the outside. The depth of the piping storage chamber is not described, and it cannot be said that the loading efficiency of the indoor unit is fully considered.

  In a general indoor unit, as shown in Patent Document 1, the length of the auxiliary refrigerant pipe for entering and leaving the refrigerant connected to the heat exchanger is shorter than the width of the indoor unit. An auxiliary refrigerant pipe extends from one side to the middle. At the time of installation, when the refrigerant pipe is further pulled out from the auxiliary refrigerant pipe and led out to the outside, the connecting refrigerant pipe made manually is connected to the tip of the auxiliary refrigerant pipe and the heat insulating member After being wound, it is stored by being pushed into the piping storage chamber.

  However, the refrigerant pipe for connection is a pair pipe in which two refrigerant pipes (going and returning refrigerant pipes) are housed in one heat insulating material, and its bending rigidity is large. Therefore, there is a problem that it is difficult to securely store in the pipe storage chamber. Further, when the connecting refrigerant pipe is not completely stored in the pipe storage chamber, there is a problem that the indoor unit cannot be installed in parallel to the wall surface due to the repulsive force of the heat insulating material. Therefore, in a general indoor unit, the entire depth of the pipe storage chamber is determined in accordance with the depth of the pipe storage chamber on the side of the connecting refrigerant pipe.

  However, since the auxiliary refrigerant pipe is bent by a dedicated machine and stored in the pipe storage chamber when the indoor unit is manufactured, the depth on the auxiliary refrigerant pipe side of the pipe storage chamber is the connecting refrigerant pipe. As compared with the depth of the bent portion side, the depth may be small. Nevertheless, in a general indoor unit, the back casing of the cross-flow fan has the entire depth of the piping storage chamber adjusted to the depth of the connecting refrigerant pipe side of the piping storage chamber. In addition, the discharge ventilation path becomes narrow as a whole, leading to a reduction in air volume and an increase in noise.

  An object of the present invention is to provide an indoor unit of a separation-type air conditioner that can improve installation workability and air conditioning performance while achieving downsizing.

In order to achieve the above object, the present invention accommodates a horizontally long cross-flow fan and a heat exchanger constituting a part of a refrigeration cycle in a casing, and forms a discharge ventilation path downward and forward from the cross-flow fan. Is provided with a rear casing that extends in an arc shape extending from the upper winding start point to the lower winding end point, and forms a pipe storage chamber that extends to the left and right at the bottom of the rear casing and opens to the rear side, and is connected to the heat exchanger. In the indoor unit of the separation type air conditioner provided with the auxiliary refrigerant pipe extending from one side to the middle of the pipe storage chamber, it is a portion on the tip side of the portion where the auxiliary refrigerant tube is stored and is connected at the time of installation. bend forms a housing chamber enlarged portion is recessed to the discharge ventilation path side than the portion where the auxiliary refrigerant pipe is housed in the portion of the pipe storage room to be housed in use refrigerant pipe, the storage expansion chamber Form The portion of the rear casing from the upper winding start point which is constituted by a continuous arc leading to the lower winding end point.

A more preferable specific configuration of the present invention is as follows.
(1) inclined to be formed to vary before Symbol linearly the recessed depth of housing chamber enlargement portion in the lateral direction.

According to the indoor unit of the separation type air conditioner of the present invention, without increasing the external shape of the chamber unit, be performed easily and reliably accommodating work on the pipe storage chamber of the connecting refrigerant tubes during installation In addition, it is possible to widen the discharge ventilation path of the cross-flow fan on the auxiliary refrigerant pipe side to save power by increasing the air volume and to reduce noise by lowering the wind speed . In addition, smooth indoor air flow in the discharge ventilation path to ensure the Ru it is possible to suppress the noise.

According to a preferred configuration of the present invention, since the formed so as to vary the recessed depths retract and chamber enlargement portion inclined in the lateral direction in a straight line, the wind speed distribution in the lateral direction of the discharge ventilation path Can be changed smoothly, and noise can be suppressed.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments indicate the same or equivalent.

  First, an indoor unit of a separation type air conditioner according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view showing an indoor unit of the present embodiment, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a rear perspective view of FIG. 1, and FIG. Note that the broken lines in FIG. 2 indicate the BB cross section (DD cross section of FIG. 3) in FIG.

  The indoor unit 50 of the separation type air conditioner is configured by housing a horizontally long cross-flow fan 6 and a heat exchanger 5 constituting a part of a refrigeration cycle in a housing 3.

  As shown in FIG. 1, the housing 3 is provided with a suction port 1 and a discharge port 2 for indoor air. The suction port 1 is formed on the front surface of the housing 3. The discharge port 2 is formed in the lower part of the housing 3 and is provided with a wind direction plate 4. Closed surfaces 3 a and 3 b that are not effective for ventilation are provided at the left and right ends of the housing 3. The right closing surface 3a accommodates the return portion of the refrigerant pipe 5a on one side of the heat exchanger 5, the auxiliary refrigerant pipe 12 connected to one side of the heat exchanger 5, the fan motor 11, control equipment, and the like. This is to prevent ventilation in the room. The left closing surface 3b is for preventing ventilation of the return portion of the refrigerant pipe 5a on one side of the heat exchanger 5. The right closing surface 3a is wider than the left closing surface 3b.

  As shown in FIG. 2, a heat exchanger 5 and a cross-flow fan 6 are juxtaposed in the front and rear of the housing 3. The heat exchanger 5 and the once-through fan 6 have substantially the same width as that of the suction port 1.

  The heat exchanger 5 is disposed on the suction side of the cross-flow fan 6 behind the suction port 1. The heat exchanger 5 is a plate fin tube type heat exchanger configured such that a refrigerant pipe 5a passes through a large number of juxtaposed fins 5b. In FIG. 2, the refrigerant pipe 5 a in the central portion of the heat exchanger 5 is omitted, but the refrigerant pipe 5 a is provided over the entire heat exchanger 5.

  The cross-flow fan 6 is located substantially in the center in the height direction in the housing 3 and is disposed behind the heat exchanger 5. The cross-flow fan 6 has a horizontally long cylindrical shape, extends horizontally in the left-right direction, and is rotatably supported. The cross-flow fan 6 is disposed between the rear casing 7 and the front casing 8 and is configured to suck indoor air from the front and upper side and discharge it downward.

  The back casing 7 constitutes a casing that forms the back ventilation part of the cross flow fan 6 as well as the back part of the housing 3. The rear casing 7 has an upper winding start point 7s that extends in an arc from the closest upper winding start point 7s to the cross-flow fan 6 and reaches the lower winding end point 7e. The upper winding start point 7 s constitutes a back side nose of the cross-flow fan 6, and the lower winding end point 7 e is also a separation point 2 a that is separated as a front cover of the housing 3.

  The rear discharge casing portion 7 a has an arcuate bulge that is gradually spaced away from the cross-flow fan 6 in the rotation direction of the cross-flow fan 6 over about 120 degrees around the cross-flow fan 6, and is continuous with the discharge port 2. . The rear discharge casing portion 7a is designed to be as large as possible in order to reduce the ventilation loss. The top portion of the rear side is located almost at the rearmost of the indoor unit, and by adding a dew treatment member 7c etc., the thickness dimension of the indoor unit Is determined.

  The front casing 8 constitutes a front nose of the cross-flow fan 6 and a casing that forms a discharge ventilation path of the cross-flow fan 6. The front casing 8 forms a discharge ventilation path together with the rear discharge casing portion 7 a and is continuous with the discharge port 2. The front casing 8 is formed to have a function as a dew receiving tray of the cross-flow fan 6.

  When the cross-flow fan 6 is rotated as shown by an arrow 21 (see FIG. 2), the indoor air is sucked into the housing 3 through the suction port 1 as shown by a hollow arrow 22 and passes through the heat exchanger 5. The air is sucked into the cross-flow fan 6 and blown into the room from the discharge port 2 through the discharge ventilation path as indicated by an arrow 23.

  In addition, a pipe housing chamber 9 is formed at the bottom of the back casing 7 so as to extend from side to side and open to the back side. The pipe storage chamber 9 is provided longer than the lateral width of the cross-flow fan 6 and is formed over the entire lateral width of the housing 3. The piping storage chamber 9 stores an auxiliary refrigerant pipe 12 together with a drain hose 10 and a cable (not shown) for drainage.

  The auxiliary refrigerant pipe 12 is bent and formed into a predetermined shape by a dedicated machine when the indoor unit 50 is manufactured, and is stored on the one side of the heat exchanger 5 (right side in FIG. 1) while being stored in the pipe storage chamber 9. Shipped connected. The auxiliary refrigerant pipe 12 has a length shorter than the width of the indoor unit, and is stored in the pipe storage chamber 9 so as to extend from one side to the middle.

  When the indoor unit 50 is installed, when the refrigerant pipe is further pulled out from the auxiliary refrigerant pipe 12 and led out to the outside, it is separately prepared and led to the outside as shown by a two-dot chain line in FIG. The connecting refrigerant pipe 13 is connected. The connecting refrigerant pipe 13 is installed through a hole provided in a wall of a building and is connected to a refrigerant pipe on the outdoor unit (not shown) side to constitute a closed refrigeration cycle.

  A storage chamber expansion portion 15 that is recessed toward the discharge air passage is formed in a portion of the pipe storage chamber 9 that is on the tip side of the portion where the auxiliary refrigerant tube 12 is stored and in which the connection refrigerant tube 13 is stored during installation. Has been. The storage chamber expanding portion 15 is formed by providing a back surface discharge casing portion 7a with a step 16 in the left-right direction. As shown by a broken line in FIG. 2, the depth of the piping storage chamber 9 of the storage chamber expanding portion 15 is formed. Haa is made larger than the depth Hab of the other part. In other words, paying attention to the fact that the auxiliary refrigerant pipe 12 is finished into a predetermined shape by machining as a part and does not require the same dimension as the bent portion depth Haa of the storage chamber enlarged portion 15. The depth Hab is made shallower, and the back discharge casing portion 7a is enlarged to the actual position shown in FIG. Further, the storage chamber expanding portion 15 is formed by a continuous arc extending from the upper winding start point 7s of the back casing 7 to the lower winding end point 7e.

  As shown in FIG. 3, the connecting refrigerant pipe 13 is bent 90 degrees from a lateral pulling end portion in the pipe storage chamber 9 toward a hole such as a rear wall. The connecting refrigerant pipe 13 is formed with a bent portion 13a bent by approximately 90 degrees before being connected to the auxiliary refrigerant pipe 12 by an installation worker, and after finishing the connection, finishing correction is performed, and then the pipe storage It is stored in the chamber 9 well. The bent portion 13 a is stored in a portion of the storage chamber expanding portion 15 of the pipe storage chamber 9. A heat insulating member 17 is wound around the auxiliary refrigerant pipe 12, the connecting refrigerant pipe 13 and the connecting portion.

  According to such a configuration, the necessary space as the pipe storage chamber 9 is different in the lateral width direction due to the processing and installation work of the auxiliary refrigerant pipe 12 at the time of shipment. Since the minimum necessary depth dimensions Haa and Hab are ensured, there is an effect that the refrigerant pipe bending work and the storing and summing work for derivation can be easily performed.

  Further, on the auxiliary refrigerant pipe 12 side, the distance between the cross-flow fan 6 and the rear discharge casing portion 7a is increased at the intermediate portion of the rear discharge casing portion 7a, which is the substantially maximum region of the flow velocity of the discharge ventilation passage. The flow velocity in this portion is lowered, and accordingly, the outflow area of the cross-flow fan 6 on the upstream side (generally the width of about 1/4) widens in proportion to the flow velocity of the wing portion 6a. , Blowing noise can be reduced. In addition, the flow velocity decreases, so that the flow loss between the rear discharge casing portion 7a and the blades 6a is reduced, and the air volume can be increased even if the rotation speed is the same. Therefore, it is possible to contribute to improvement of the refrigerating capacity or downsizing of the unit.

According to the indoor unit 50 of the separation type air conditioner of the present embodiment, piping accommodating the auxiliary refrigerant pipe 12 Ru connecting the refrigerant pipe 13 is accommodated during installation a distal portion of the more housing portions since forming a housing chamber enlarged portion 15 which is recessed in the ejection exit ventilation path side to the portion of the chamber 9, without increasing the outer shape of the indoor unit 50, into the pipe storage chamber 9 of the connection refrigerant pipe 13 at the time of installation Can be easily and reliably stored, and the discharge air passage of the cross-flow fan 6 on the auxiliary refrigerant pipe 12 side is widened to save power by increasing the air volume and to reduce noise by lowering the wind speed. it can.

  Further, according to the present embodiment, the storage chamber expanding portion 15 is formed by a continuous arc from the upper winding start point 7s to the lower winding end point 7e of the back casing 7 of the storage chamber expanding portion 15, so that in the discharge ventilation path Noise can be suppressed by ensuring a smooth flow of room air.

  In the present embodiment, the upper winding start point 8s and the lower winding end point 8e of the rear discharge casing portion 7a are collinear in the horizontal width direction of the fan 6 to facilitate the design and manufacture of the mold and the periphery of the discharge port. Is designed to improve the design and design of the wind direction plate. However, when emphasizing fan performance, the position of the upper winding start point 8s or the lower winding end point 8e may be slightly shifted in the fan direction, the scroll extension direction, or the rotation direction.

  Moreover, according to the present Example, since the storage chamber expansion part 15 is formed through the level | step-difference part 16 in the middle of the left-right direction of the back surface discharge casing part 7a, design and manufacture of a type | mold can be made easy.

  Instead of providing the stepped portion 16, the recessed depth of the storage chamber expansion portion 15 and the storage chamber expansion portion may be formed to change in a straight line in the left-right direction. In this case, as compared with the case where the step portion 16 is provided, the wind speed distribution in the left-right direction of the discharge ventilation path can be changed smoothly, and noise can be suppressed.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view of the main part of the indoor unit of the separation type air conditioner according to the second embodiment of the present invention, and is a cross-sectional view at a position corresponding to the AA cross section of FIG. The second embodiment is different from the first embodiment in the following points, and is basically the same as the first embodiment in other points.

  In the second embodiment, the storage chamber expanding portion 15 is formed such that the storage chamber expanding portion 15 is partially depressed between the upper winding start point 7 s and the lower winding end point 7 e of the rear casing 7. Specifically, only the region corresponding to the bent portion 13a is slightly forward (discharging air passage side) like the storage chamber enlarged portion 15 indicated by the broken line in FIG. 5 (position corresponding to the BB cross section in FIG. 1). It has been transformed into.

  According to the second embodiment, there is no need to change from the winding start point 8s to the middle, and the vicinity of the winding end point 8e, and the storage chamber requires a lot of space for bending in the axial direction. Since the depth increase ΔH can be absorbed here, the size of the scroll 7a can be increased in the entire axial direction except for the storage chamber expanding portion 15, so that noise can be reduced and the auxiliary refrigerant pipe 12 on the connection side can be reduced. The suction air volume can be increased. Further, not only the installation work is facilitated, but also the design is a partial change, which can be easily implemented.

  In addition, although the storage chamber expansion part 15 is made into the form which swells slightly in the inner surface side in the figure, the same effect is acquired even if it is a linear slice shape.

It is a perspective view of the indoor unit of the separation-type air conditioner of 1st Example of this invention. It is AA sectional drawing of FIG. FIG. 2 is a rear perspective view of FIG. 1. It is CC sectional drawing of FIG. It is principal part sectional drawing of the indoor unit of the separation-type air conditioner of 2nd Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Suction port, 2 ... Discharge port, 3 ... Housing | casing, 3a, 3b ... Closed surface, 4 ... Wind direction board, 5 ... Heat exchanger, 6 ... Cross-flow fan, 7 ... Back casing, 7a ... Back discharge casing part, 7s ... upper winding start point, 7e ... lower winding end point, 8 ... front casing, 9 ... piping storage chamber, 10 ... drain hose, 11 ... fan motor, 12 ... auxiliary refrigerant pipe, 13 ... connection refrigerant pipe, 13a ... Bending part, 15 ... storage chamber expanding part, 16 ... step, 17 ... heat insulating member, 50 ... indoor unit.

Claims (2)

A horizontally long once-through fan and a heat exchanger constituting a part of the refrigeration cycle are housed in a housing,
A rear casing is provided that extends in an arc shape from the upper winding start point to the lower winding end point so as to form a discharge ventilation path forward and downward from the cross-flow fan,
Forming a pipe storage chamber that extends to the left and right at the bottom of the back casing and opens to the back side;
In the indoor unit of the separation-type air conditioner provided with an auxiliary refrigerant pipe connected to the heat exchanger and extending partway from one side of the pipe housing chamber,
Than the said pipe and the auxiliary refrigerant pipe portion of the storage chamber is accommodated a portion auxiliary refrigerant pipe bend of the connecting refrigerant pipes during installation a part of the tip side of the housing portion is housed Forming a storage chamber enlarged portion recessed on the discharge ventilation path side ;
An indoor unit of a separation type air conditioner , wherein a portion of a back casing forming the storage expansion chamber is configured by a continuous arc from the upper winding start point to the lower winding end point . The separated unit of the separated air conditioner according to claim 1 , wherein the depth of the recessed portion of the storage chamber expanding portion is formed to change in a straight line in the left-right direction. Indoor unit of air conditioner.

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