JP5422953B2 - Indoor unit for air conditioner - Google Patents

Description

  The present invention relates to a configuration of an indoor unit for an air conditioner that can be made thin and compact.

In a conventional wall-mounted indoor unit that is generally used, for example, a lambda type cross fin heat exchanger is supported on two front and rear drain pans, and a cross flow fan is installed between the lambda type heat exchangers. The wind passing through the heat exchanger is blown into the room through the scroll passage (see, for example, Patent Document 1).

  However, in such a configuration, the heat exchanger and the cross flow fan are superposed in the front-rear direction, and there is a limit to reducing the thickness of the indoor unit main body.

  Therefore, the present applicant, for example, arranges aluminum laminated heat exchangers that are small and have high heat exchange efficiency on the left and right sides of the centrifugal fan with a small axial length, and exchanges the air sucked from the center on the front side. An attempt is made to reduce the thickness of the indoor unit main body as much as possible by blowing it forward from the air outlets on the left and right sides via a container (see, for example, Patent Documents 2 and 3).

Japanese Utility Model Publication No. 5-8316 (FIGS. 1 and 2) Japanese Patent Laying-Open No. 2006-29702 (FIGS. 2 and 3) JP 2006-336909 A (FIG. 17)

  By the way, in the stacked heat exchanger as described above, for example, as shown in FIG. 3 of Patent Document 3, the header and the refrigerant inlet / outlet are concentrated on one side of the heat exchanger. When the heat exchanger is installed so that the pipe is concentrated, the pipe is concentrated at the lower part, and when the heat exchanger is installed so that the header is at the upper side, the pipe is concentrated at the upper part.

  However, if piping is provided at the top, the size of the indoor unit must be increased in order to secure piping space. In addition, condensed water condensed on the piping during cooling may drop and hit a structure such as a fan and jump out of the machine. In order to prevent dew condensation, there is a problem that the size of the indoor unit is further increased when a heat insulating material is wound around the pipe.

The present invention has been made to solve such a problem, and a pair of left and right heat exchangers of the fan and a drain pan are provided at the lower part of the fan. An object of the present invention is to provide an indoor unit for an air conditioner that solves the above-described problems by storing each refrigerant pipe in a drain pan by storing and connecting the refrigerant pipes.

  In order to achieve the above object, the present invention comprises the following effective problem solving means.

(1) Invention of Claim 1 This invention was provided in the box type indoor unit casing, the air inlet provided in the front side center part of this indoor unit casing, and the front side right and left of the said indoor unit casing A pair of left and right air outlets, a pair of air passages inside the indoor unit casing and continuous from the air inlet to the pair of left and right air outlets, and upstream of each of the pair of air passages. A common fan provided corresponding to the air suction port, and a pair of left and right heat exchangers provided corresponding to the pair of left and right air outlets on the downstream side of the pair of air passages. An indoor unit for an air conditioner , wherein the pair of left and right heat exchangers are configured by a stacked heat exchanger, and a refrigerant header is provided at a lower portion of the stacked heat exchanger, while the stacked heat exchanger consisting vessels pair of heat exchanger Contact Set only a drain pan located at the bottom of the micro fan is characterized in that the housing continuously provided each of the refrigerant pipes of the pair of heat exchangers each other within the drain pan.

As described above, the pair of left and right heat exchangers are configured by a stacked heat exchanger, and a refrigerant header is provided at the lower portion of the stacked heat exchanger, while a pair of left and right heat exchanges including the stacked heat exchanger are provided. set only a drain pan located at the bottom of the vessel and the fan, when each of the refrigerant pipes of the pair of left and right heat exchanger mutually having the above described stacked heat exchanger so as to house continuously provided within the drain pan, the laminated heat Condensed water discharged from the surface of the exchanger can be reliably collected in the drain pan, while a large number of refrigerant pipes concentrated on the lower side of the stacked heat exchanger make use of the empty space in the drain pan. It is stored without interfering with other members.

  Therefore, it is not necessary to secure an extra piping space, and the indoor unit body can be made more compact.

  Further, the condensed water generated in the refrigerant pipe portion can also be collected in the drain pan as it is without being scattered outside.

(2) Invention of Claim 2 This invention is characterized in that, in the structure of the invention of Claim 1, the drain pan is formed integrally with the back plate of the indoor unit casing.

  As described above, when the drain pan is formed integrally with the back plate of the indoor unit casing used for mounting the fan, the heat exchanger and the fan are integrated into the drain pan and integrated into the unit casing. It can be housed and integrated, facilitating manufacturing, assembly and maintenance.

(3) Invention of Claim 3 This invention is the structure of the invention of the said Claim 1 or 2, It is characterized by the partition plate being provided between the fan and the drain pan.

  As described above, when the partition plate is provided between the fan and the heat exchanger and the drain pan, it is possible to prevent the air from the fan from acting on the refrigerant pipe side and the phase change of the refrigerant in the refrigerant pipe. The air blown from the fan is rectified and guided by the partition plate and smoothly blown to the left and right air outlets.

  In addition, the wind from the fan does not pass through the heat exchanger, passes through the drain pan, and is prevented from blowing out from the outlet.

  Therefore, the air blowing performance is improved.

(4) Invention of Claim 4 This invention is the structure of the invention of the said Claim 1, 2 or 3, and a pair of left and right heat exchangers are a pair of air passages extending from the central part in the indoor unit casing to the left and right. Each of them is characterized by being inclined so as to form a cross-section with each other.

  In this way, the pair of left and right heat exchangers are provided so as to be inclined so as to form a cross-section with each other in each of the pair of air passages extending left and right from the central portion in the indoor unit casing. While ensuring the necessary heat exchange area, the thickness of the indoor unit main body in the front-rear direction can be made as small as possible, and the thickness can be further reduced.

(5) Invention of Claim 5 This invention is the structure of the said invention of Claim 1, 2, 3 or 4, The positioning member which positions each of a pair of left and right heat exchangers is provided in the left and right in the drain pan. It is characterized by being.

  Thus, when positioning members for positioning the pair of left and right heat exchangers are provided on the left and right in the drain pan, the assembly becomes very easy when the heat exchanger is assembled to the drain pan. Manufacturing efficiency is improved.

(6) Invention of Claim 6 This invention is the structure of the invention of the said Claim 1, 2, 3 or 4, The level | step-difference part for positioning each of a pair of left and right heat exchangers in the bottom part of a drain pan is provided. It is characterized by being formed.

  As described above, when a step portion for positioning each of the pair of left and right heat exchangers is formed at the bottom of the drain pan, the assembly becomes very easy when the heat exchanger is assembled to the drain pan. , Manufacturing efficiency is improved.

(7) Invention of Claim 7 This invention is the structure of the invention of said Claim 6, The heat insulating material is provided in the bottom part outer periphery of the drain pan using the said level | step difference part for positioning. .

  According to such a structure, installation and attachment of a heat insulating material become easy, and a step part can be utilized more effectively.

  As a result, according to the present invention, it is possible to realize an indoor unit for an air conditioner that can be easily assembled while reducing the thickness and size of the indoor unit body more effectively.

(Best Embodiment 1)
FIGS. 1-12 has shown the structure of the indoor unit for air conditioners which concerns on the best Embodiment 1 of this invention.

  In FIG. 1 to FIG. 3, first, reference numeral 1 denotes a twin-type indoor room for an air conditioner in which a pair of indoor unit units composed of a combination of, for example, one fan and two heat exchangers are arranged in both left and right directions. This is a cassette-type main body casing that is long in the left-right direction of the machine and flat in the front-rear direction. The main body casing 1 has rear panels (rear panels) 1a and 1a which are mounting surfaces of a fan motor 8b of the fan 8 described later on the rear side, side panels (side panels) 1b and 1b on the left and right end surfaces, and the front side. Are provided with intake and outlet panels (front plates) 1c, 1c, upper panels (top plates) 1d, 1d on the upper surface side, and lower panels (bottom plates) 1e, 1e on the lower surface side, respectively.

  Among these panels 1a, 1a, 1b, 1b, 1c, 1c, 1d, 1d, 1e, and 1e, each panel portion excluding the back panels 1a and 1a is formed by a single plate material that is continuous with each other. .

  The front side intake / blowout panels 1c and 1c of the main body casing 1 are provided with circular air inlets 5 and 5 each having a bell mouth function at the center, and further, a centrifugal air inlet is provided on the inner side. Turbo fans 8 and 8 having a small axial length in the depth direction are provided as blowers.

  The turbofans 8, 8 are configured to include a large number of blades 8a, 8a,..., 8a, 8a... Between main plates 8d, 8d and shrouds 8c, 8c.

  A pair of rectangular air outlets 7, 7, 7, extending in the vertical direction with a predetermined width are provided on the left and right sides of the air inlets 5, 5 of the intake / blowout panels 1 c, 1 c of the main casing 1. 7 is provided. Of these air outlets 7, 7, 7, 7, the casing central portion side is formed in common.

  In the main body casing 1, two-way ventilation paths (air passages) extending from the air inlets 5, 5 of the bell mouth structure to the left and right air outlets 7, 7, 7, 7. 6, 6, 6, 6 are formed, and are located behind the air suction ports 5, 5 of the ventilation passages 6, 6, 6, and correspond to the air suction side shrouds 8 c, 8 c. (In the form of loose fitting), turbo fans 8 and 8 are installed and fixed to the rear panels 1a and 1a of the main body casing 1 via fan motors 8b and 8b inside the impeller.

  The rear panel 1a has a required height H as shown in FIG. 4, for example, and is formed in common with the back plate 16 of the lower drain pan 15 (the back plate 16 that is the same plate material is extended upward). Is formed).

  The air passages 6, 6, 6 and 6 have a pair of left and right air at positions corresponding to the downstream air outlets 7, 7, 7 and 7 with the turbo fans 8 and 8 sandwiched between them. Heat exchangers 9, 9, 9, 9 are provided. The pair of left and right air heat exchangers 9, 9, 9, 9 are mutually connected in each of the pair of left and right air passages 6, 6, 6, 6 extending left and right from the central portion in the indoor unit body casing 1. It is provided with a sufficient inclination so as to form a square shape.

  In this way, the pair of left and right air heat exchangers 9, 9, 9, 9 are mutually connected in each of the pair of ventilation paths 6, 6, 6, 6 extending from the center in the indoor unit body casing 1 to the left and right. For example, as clearly shown in FIG. 3, the thickness of the indoor unit in the front-rear direction (depth dimension) is secured while effectively ensuring the necessary heat exchange area. ) Can be made as small as possible, and the indoor unit body can be made thinner.

  In the case of this embodiment, the air heat exchangers 9, 9, 9, 9 include flat heat transfer tubes (multi-hole tubes) 9a, 9a,. It comprises a compact aluminum laminated heat exchanger with extremely high heat transfer performance provided with heat fins (corrugated fins as an example) 9b, 9b. Reference numerals 20 (20 a, 20 b) and 20 (20 a, 20 b) are refrigerant headers, which are provided on the lower side of the aluminum laminated air heat exchanger 9. And refrigerant piping 21a-21d (refer FIG. 7) is concentrated and connected with respect to these refrigerant | coolant headers 20 (20a, 20b), 20 (20a, 20b).

  For example, as shown in FIGS. 4 and 9 to 11, the air heat exchangers 9, 9, 9, 9 have their lower end side refrigerant headers 20, 20 positioned on the bottom surface 15 a of the drain pan 15 with a predetermined positioning. It is supported so as to be integrated with the drain pan 15 by being accurately positioned and fixed using the members 22 and 23.

  Positioning members 22 and 23 are positioning members 22b and 23b for setting an inclination angle each having a vertical positioning member 22a and 23a having a low height and a tapered surface portion for setting an inclination angle (a square shape) having a high height. And the recesses 22c and 23c for fitting and fixing the front and rear corners of the air heat exchangers 9 and 9 are provided between the positioning members 22a, 23a, 22b and 23b and the drain pan surface. It is formed corresponding to the power inclination angle.

  Therefore, if the lower ends of the air heat exchangers 9 and 9 are dropped into the recesses 22c and 23c as shown in FIGS. 9 to 11 and fitted, it is easily stabilized at a desired height and a desired inclination angle. Can be installed in the state.

  Furthermore, in this embodiment, as shown in FIGS. 4 and 7, for example, a supercooling heat exchanger 19 is provided that acts as a condenser during heating operation and acts as an evaporator during cooling operation, as required. The supercooling heat exchanger 19 is disposed substantially symmetrically on the front side of the air outlets 7 and 7 side air heat exchangers 9 and 9 of the turbofans 8 and 8. For example, as shown in FIG. 6, this supercooling heat exchanger 19 is a heat exchanger with a small cylindrical fin having a simple structure in which a spine fin 19a is wound around one continuous heat exchange tube 21d as a refrigerant pipe. The heat exchange tube 21d is installed so as to face in the vertical direction.

  In the indoor unit main body casing 1, the rear side panels 1 a and 1 a, the left and right end side panels 1 b and 1 b, and the front side panel 1 c corresponding to the pair of left and right air heat exchangers 9, 9, 9, 9. Vacuum insulators 10, 10, and 10 each having a vacuum inside and a flat surface are attached to the wall surface portions. The vacuum heat insulating materials 10, 10, and 10 have an aluminum wheel 10c attached to the outer periphery of a synthetic resin sheet-like vacuum tube 10a that contains (fills) glass wool 10b for shape retention inside as shown in FIG. It is configured.

  By the way, in the case of the present embodiment, the aluminum laminated air heat exchangers 9, 9, 9, 9 having a small size and high heat exchange efficiency as described above are tilted to the left and right of the turbo fans 8, 8, respectively. The indoor unit main body is arranged as much as possible by blowing it out from the air outlets 7, 7, 7, 7 on the left and right sides. When the thickness is reduced, a pair of left and right air is further obtained as shown in FIG. 4 (viewed from the front side) and FIG. 8 (viewed from the back side with the back plate 16 removed). Below the heat exchangers 9, 9, 9, and the turbofans 8, 8, a dish-shaped drain pan 15 (bottom surface portion 15 a) is provided in common over them. And a large number of each of the pair of left and right air heat exchangers 9, 9, 9, 9 is accommodated in the space using a free space of a predetermined depth in the drain pan 15. Refrigerant piping 21a-21d is arrange | positioned.

  That is, in the stacked air heat exchangers 9 and 9 as described above, the refrigerant header and the refrigerant inlet / outlet are concentrated on one side of the heat exchanger as described above. When the air heat exchangers 9 and 9 are installed so that the headers 20 and 20 are on the lower side, the refrigerant pipes 21a to 21d are concentrated on the lower part. On the other hand, when the air heat exchangers 9 and 9 are installed so that the refrigerant headers 20 and 20 are on the upper side as shown in FIG. 17, the refrigerant pipes 21a to 21d are concentrated on the upper part. And if refrigerant headers 20 and 20 are brought to the upper part, in order to secure piping space, the size of an indoor unit main part must be enlarged. In addition, condensed water condensed on the refrigerant pipes during cooling may drop and hit a structure such as a fan and jump out of the machine. In addition, when a heat insulating material is wound around the refrigerant pipe to prevent condensation, there is a problem that the size of the indoor unit is further increased.

  Therefore, in the present embodiment, in order to solve such a problem, for example, as shown in FIGS. 4 and 8, the pair of left and right air heat exchangers 9 and 9 and the turbo fan 8 of the turbo fans 8 and 8 are provided. , 8 is provided with a drain pan 15, and in the drain pan 15, each of the pair of left and right air heat exchangers 9, 9, 9, 9 is connected and accommodated in the drain pan 15. All the pipes are accommodated in order to solve the above problems.

  That is, as described above, the drain pan 15 is provided below the pair of left and right air heat exchangers 9, 9, 9 and the turbofans 8, 8, and the pair of left and right air heat exchangers 9 are provided in the drain pan 15. , 9, 9, and 9 each of the refrigerant pipes 21a to 21d are connected and connected to each other, the condensed water discharged from the surfaces of the air heat exchangers 9, 9, 9, and 9 is reliably recovered in the drain pan 15. On the other hand, the multiple refrigerant pipes 21 a to 21 d concentrated on the lower side of the air heat exchangers 9, 9, 9, 9 do not interfere with other members using the empty space in the drain pan 15. Be paid.

  Therefore, it is not necessary to secure an extra piping space, and the indoor unit body can be made more compact.

  Further, the condensed water generated in the refrigerant pipe portion can also be collected in the drain pan as it is without being scattered outside.

  Moreover, in the above configuration, the drain pan 15 is formed integrally with the back panels (back plates) 1a and 1a of the indoor unit casing as described above.

  As described above, when the drain pan 15 is formed integrally with the rear panels 1a and 1a of the indoor unit casing used for mounting the turbo fans 8 and 8, the air heat exchangers 9, 9, 9, 9 and the turbofans 8 and 8 can be integrated and integrated into an indoor unit casing in the form of a unit, making manufacture, assembly, and maintenance easy.

  However, when such a configuration is adopted, the air from the turbo fans 8 and 8 is separated from the air chambers of the turbo fans 8 and 8 and the drain pan 15 side by some method, whereby the air outlets 7, 7, 7, 7 are used. It is necessary to avoid the effect of wind on the refrigerant pipes 21a to 21d in order to smoothly rectify in the direction and prevent the refrigerant from changing phase.

  Further, it is necessary to prevent the wind from the turbo fans 8 and 8 from passing through the drain pan 15 without passing through the heat exchangers 9 and 9 and blowing out from the outlets 7, 7, 7, 7.

  Therefore, in order to satisfy both of these requirements, in the present embodiment, as shown in FIG. 12, the turbo fans 8, 8 and the pair of left and right air heat exchangers 9, 9, 9, 9 and the drain pan 15 (And the refrigerant pipes 21a to 21d) are provided with the partition plates 17 and 17, thereby avoiding the cooling of the refrigerant pipes 21a to 21d, while the shape of the partition plates 17 and 17 is made turbo if necessary. By appropriately corresponding to the shape of the fans 8 and 8 (in the present embodiment, it is flat, but it may be curved into an arc shape or a scroll shape), the rectifying function is enhanced and the air is blown as much as possible. I try to improve performance.

  According to such a configuration, the partition plates 17 and 17 prevent the wind from the turbo fans 8 and 8 and the heat exchangers 9 and 9 from acting on the refrigerant pipe side, so that the refrigerant pipes 21a to 21d have a Refrigerant phase change is prevented.

  Further, since the partition plates 17 and 17 can smoothly rectify the wind from the turbo fans 8 and 8 in the direction of the air outlets 7 and 7, the air blowing performance is improved, and the air heat exchangers 9, 9, 9, The heat exchange efficiency of 9 is also improved.

  Further, the wind from the turbofans 8, 8 does not pass through the heat exchangers 9, 9, passes through the drain pan 15, and is prevented from being blown out as it is from the blowout ports 7, 7, 7, 7.

  Furthermore, in this embodiment, as shown in FIGS. 1 and 2, for example, front covers 2, 2 and 3, 3 are provided on the front side of the front side intake / outlet panels 1c, 1c as required. Provided. In that case, these front covers 2, 2, 3 and 3, for example, the inner two front covers 2 and 2 cover the air outlets 7 and 7 common to the air inlets 5 and 5 and the central side, The two outer front covers 3 and 3 are configured to individually cover the air outlets 7 and 7 on both ends of the main casing 1.

  The inner front covers 2 and 2 are opened and closed in the front-rear direction (or front-rear oblique direction) by, for example, link structure support members 21 and 21, respectively. In the open state, the air suction ports 5 from both the upper and lower directions as shown in FIG. , 5 is allowed to enter the air, and air is blown out by opening the common air outlets 7 and 7 in the central portion.

  On the other hand, the outer front covers 3 and 3 are opened and closed by a hinge structure, and in the open state, the air outlets 7 and 7 on the left and right ends of the casing are opened to blow out air.

  On the other hand, when all of the front covers 2, 2, 3, 3 are closed as shown in FIG. 1, a thin and thin cabinet structure with a flat face is formed as a whole casing.

(Best Mode 2)
Next, FIGS. 13 to 16 show the configuration of an indoor unit for an air conditioner according to Embodiment 2 of the present invention.

  In the case of this embodiment, as shown in FIGS. 13 to 15, for example, in the lower part of the drain pan 15 provided with positioning members 24 and 25 for setting an inclination angle similar to that of the configuration of the first embodiment. The step portions 15a and 15b are formed, and the function as a positioning member in the height direction is realized using the upper step surfaces of the step portions 15a and 15b. For example, a vacuum heat insulating material 10 as thin as possible as shown in FIG. 16 is provided.

  The vacuum heat insulating material 10 is configured, for example, by sticking an aluminum wheel 10c to the outer periphery of a synthetic resin sheet-like vacuum tube 10a in which glass wool 10b for shape retention is housed (filled).

  In general, a heat insulating material is attached to the drain pan 15 as a countermeasure against condensation. However, in the thin indoor unit as described above, it is desirable to reduce the thickness of the heat insulating material (especially on both the front and rear sides). ). Therefore, instead of the positioning members of the air heat exchangers 9 and 9 described above, a step portion 15b is provided in the drain pan 15 to form a positioning portion in the height direction, and the heat insulating material 10 is attached to the outside of the step portion 15b. This prevents the heat insulating material 10 from protruding as much as possible from the drain pan 15.

  Other configurations and effects are exactly the same as those of the first embodiment.

(Best Mode 3)
Next, FIGS. 18 to 20 show the configuration of an indoor unit for an air conditioner according to Embodiment 3 of the present invention.

  In the case of this embodiment, the supercooling heat exchanger 19 having the configuration of the first embodiment is changed from a cylindrical heat exchanger with spine fins, for example, a flat cross fin coil as shown in FIGS. It is characterized by changing to a heat exchanger of the type.

  With such a configuration, the heat exchange efficiency at the time of supercooling can be further improved.

  That is, since the cross fin coil type supercooling heat exchanger 19 is considerably thinner than the spine fin type supercooling heat exchanger described above, it is natural that the space problem is solved. The pressure loss decreases and the heat exchange capacity increases by 50% or more under the same ventilation resistance value. Therefore, the heat exchange efficiency at the time of supercooling can be improved.

  Further, when the cross fin coil type supercooling heat exchanger 19 is used in this way, the refrigerant pipe 21d can be formed into a U-shaped pipe structure, and therefore all the portions including the mutual connecting portions of the refrigerant pipe 21d are arranged. It becomes possible to dispose and arrange in the drain pan 15, so that all the refrigerant pipes 21 a to 21 d can be accommodated in the drain pan 15, resulting in the merit of further miniaturization. In addition, water splash can be completely eliminated.

  On the other hand, in the cross fin coil-type supercooling heat exchanger 19, the plate fins are orthogonal to the heat transfer tubes, and when the supercooling heat exchanger 19 is installed in a vertical state, the plate fin portion is horizontal. Therefore, there are some problems in terms of drainage.

  Therefore, in order to improve drainage of the plate fin portion, the supercooling heat exchanger 19 may be installed with a desired gradient so as to be inclined slightly in the horizontal direction rather than in the vertical direction. preferable.

  Other configurations and effects are exactly the same as those of the first embodiment.

It is a perspective view which shows the whole structure of the indoor unit for air conditioners which concerns on the best Embodiment 1 of this invention. It is sectional drawing which shows the whole structure of the state which opened the front cover of the indoor unit. It is a horizontal sectional view which shows the structure of the indoor unit. It is a perspective view which shows the internal structure of the indoor unit. It is a perspective view which shows the structure of the main heat exchanger part of the indoor unit. It is a perspective view which shows the structure of the heat exchanger part which the indoor unit follows. It is a perspective view which shows the internal structure after refrigerant | coolant piping arrangement | positioning of the indoor unit. It is a perspective view which shows the internal structure of the state installed in the drain pan after refrigerant | coolant piping arrangement | positioning of the indoor unit. It is a top view which shows the structure of the heat exchanger positioning part of the indoor unit. It is sectional drawing of the positioning part. It is the longitudinal cross-sectional view seen from the side of the positioning part. It is the longitudinal cross-sectional view seen from the front of the partition plate installation state of the said indoor unit. It is a top view which shows the structure of the heat exchanger positioning part of the indoor unit for air conditioners which concerns on the best Embodiment 2 of this invention. It is sectional drawing of the positioning part. It is the longitudinal cross-sectional view seen from the side of the positioning part. It is sectional drawing which shows the structure of the heat insulating material affixed on the positioning part lower surface side. It is a perspective view which shows the example of examination (upper installation system) of the refrigerant | coolant piping layout system of the indoor unit for air conditioners in this invention. It is a perspective view which shows the whole internal structure of the indoor unit for air conditioners which concerns on best Embodiment 3 of this invention. It is a perspective view which shows the internal structure after refrigerant | coolant piping arrangement | positioning of the indoor unit. It is a perspective view which shows the internal structure of the same state (integrated state) as FIG. 8 installed in the drain pan after refrigerant | coolant piping arrangement | positioning of the indoor unit.

  1 is a main body casing of an air conditioner indoor unit, 1a is a back panel, 1b is a side panel, 1c is a front side intake / blowout panel, 5 is an air inlet, 6 is a ventilation path (air passage), and 7 is an air blower An outlet, 9 is an air heat exchanger, 15 is a drain pan, 17 is a partition plate, and 21a to 21d are refrigerant pipes.

Claims (7)

A box-type indoor unit casing, an air inlet provided in the front side central portion of the indoor unit casing, a pair of left and right air outlets provided on the left and right sides of the front side of the indoor unit casing, and the indoor unit casing And a pair of air passages that are continuous from the air suction port to the pair of left and right air outlets, and are provided on the upstream side of each of the pair of air passages and corresponding to the air suction ports. An air conditioner indoor unit comprising a common fan and a pair of left and right heat exchangers provided on the downstream side of the pair of air passages corresponding to the pair of left and right air outlets, The pair of left and right heat exchangers are constituted by stacked heat exchangers, and a refrigerant header is provided at a lower portion of the stacked heat exchanger, while a pair of left and right heat exchangers and fans of the stacked heat exchanger are provided . Dorenpa located in the lower part The setting only, air conditioner indoor unit, characterized in that the housing continuously provided each of the refrigerant pipes of the pair of heat exchangers each other within the drain pan.   The indoor unit for an air conditioner according to claim 1, wherein the drain pan is formed integrally with a back plate of the indoor unit casing.   The indoor unit for an air conditioner according to claim 1 or 2, wherein a partition plate is provided between the fan and the drain pan.   The pair of left and right heat exchangers are provided so as to be inclined so as to form a letter C in each of the pair of air passages extending left and right from a central portion in the indoor unit casing. Item 1. An indoor unit for an air conditioner according to item 1, 2 or 3.   The indoor unit for an air conditioner according to claim 1, 2, 3, or 4, wherein positioning members for positioning the pair of left and right heat exchangers are provided on the left and right sides of the drain pan.   The indoor unit for an air conditioner according to claim 1, 2, 3, or 4, wherein a step portion for positioning each of the pair of left and right heat exchangers is formed at a bottom portion of the drain pan.   The indoor unit for an air conditioner according to claim 6, wherein a heat insulating material is provided on the outer periphery of the bottom of the drain pan using the positioning step portion.

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