JP2009115338A - Indoor unit for air conditioner - Google Patents

Abstract

Provided is a thin indoor unit for an air conditioner that avoids cooling of a refrigerant pipe and has a rectifying function enhanced by the shape of the partition plate to improve air blowing performance as much as possible.
A box-type indoor unit casing, an air inlet provided in a front central portion of the indoor unit casing, a pair of left and right air outlets provided on the left and right of the front side of the indoor unit casing, and the indoor unit A pair of air passages located inside the casing and continuing from the air suction port to the pair of left and right air outlets, and a common centrifuge provided upstream of each of the pair of air passages and corresponding to the air suction port A fan, 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, and a drain pan provided at the lower part of the pair of left and right heat exchangers and the fan An indoor unit for an air conditioner provided with a partition plate between a fan and a heat exchanger and a drain pan.
[Selection] Figure 1

Description

  The present invention relates to a configuration of an indoor unit for an air conditioner that can be reduced in thickness.

  In a conventional wall-mounted indoor unit that is generally used, for example, a lambda-type cross fin heat exchange 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 exchanger is blown into the room through the scroll passage (see Patent Document 1).

Japanese Utility Model Publication No. 5-8316 (FIGS. 1 and 2)

  Therefore, 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.

  Accordingly, the inventors of the present invention, for example, arrange a small aluminum heat exchanger having a high heat exchange efficiency and the like so as to be inclined in a square shape on the left and right of the centrifugal fan, and the air sucked from the center on the front side is placed on both the left and right sides. By trying to blow forward from the air outlet, we are trying to make the indoor unit body as thin as possible.

  In this case, a drain pan is provided below the pair of left and right heat exchangers and the centrifugal fan, and refrigerant piping necessary for the left and right heat exchanger is provided in a form housed in the drain pan, while the air chamber of the centrifugal fan It is necessary to rectify the wind from the centrifugal fan smoothly in the direction of the air outlet by partitioning the drain pan side by some method, and to avoid cooling the refrigerant piping portion in order to prevent the phase change of the refrigerant.

  Therefore, in order to meet such a demand, the present invention avoids cooling of the refrigerant pipe by partitioning the centrifugal fan, the pair of left and right heat exchangers, and the drain pan with a partition plate, while the partition plate An object of the present invention is to provide a thin indoor unit for an air conditioner in which the rectifying function is enhanced by the shape of the air conditioner and the blowing performance is improved as much as possible.

  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 centrifugal fan provided corresponding to the air suction port, 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 comprising the pair of left and right heat exchangers and a drain pan provided at a lower portion of the fan, wherein a partition plate is provided between the fan and the heat exchanger and the drain pan. It is characterized by.

  According to such a configuration, the partition plate prevents the wind from the centrifugal fan and the heat exchanger from acting on the refrigerant pipe side, so that the phase change of the refrigerant in the refrigerant pipe is prevented.

  Moreover, since the partition plate smoothly rectifies the wind from the centrifugal fan in the direction of the air outlet, the air blowing performance is improved and the heat exchange efficiency of the heat exchanger is also improved.

(2) Invention of Claim 2 This invention is the structure of the invention of said Claim 1, This invention is the box-type indoor unit casing, the air inlet provided in the front side center part of this indoor unit casing, and said indoor A pair of left and right air outlets provided on the left and right of the front side of the machine casing; a pair of air passages that are located inside the indoor unit casing and are continuous from the air inlet to the pair of left and right air outlets; A common centrifugal fan located upstream of each of the air passages and corresponding to the air suction port, and provided on the downstream side of the pair of air passages corresponding to the pair of left and right air outlets. An air conditioner comprising: a pair of left and right heat exchangers; a drain pan provided at a lower portion of the pair of left and right heat exchangers and the fan; and a partition plate provided between the fan and the drain pan. Indoor unit The rotation axis of the centrifugal fan is displaced to either the upper side or the lower side, and the interval between the air outlet of the centrifugal fan and the partition plate or the indoor unit casing top plate is increased. Yes.

  According to such a configuration, the partition plate prevents the wind from the centrifugal fan and the heat exchanger from acting on the refrigerant pipe side, so that the phase change of the refrigerant in the refrigerant pipe is prevented.

  Further, since the partition plate smoothly rectifies the wind from the centrifugal fan in the direction of the outlet, the air blowing performance is improved. In the case of this invention, the rotating shaft of the centrifugal fan is set to either the upper side or the lower side. Since the gap between the air outlet of the centrifugal fan and the partition plate or the indoor unit casing top plate is increased, the pressure loss is reduced and the air blowing efficiency is further improved.

(3) Invention of Claim 3 This invention is characterized in that, in the configuration of the invention of Claim 1, the partition plate is curved to increase the distance from the air outlet of the centrifugal fan.

  According to such a configuration, the partition plate prevents the wind from the centrifugal fan and the heat exchanger from acting on the refrigerant pipe side, so that the phase change of the refrigerant in the refrigerant pipe is prevented.

  Moreover, since the partition plate is curved and the wind from the centrifugal fan is smoothly rectified in the direction of the outlet, the air blowing performance is improved and the heat exchange efficiency of the heat exchanger is also improved.

(4) Invention of Claim 4 This invention is the structure of the invention of said Claim 1, The said centrifugal fan has a scroll channel | path, and the said partition plate is curved along the channel | path shape of this scroll channel | path. It is characterized by.

  Thus, when the centrifugal fan has a scroll passage, the partition plate is preferably curved along the passage shape of the scroll passage, and the air blowing performance is further improved when configured as such.

(5) Invention of Claim 5 This invention is the structure of the invention of the said Claim 1, 2, 3, or 4 WHEREIN: A pair of left and right heat exchangers are the air path extended right and left from the center part in an indoor unit casing. Each of them is characterized by being inclined so as to form a C-shape with each other.

  In this way, when the pair of left and right heat exchangers are provided so as to form a cross-section with each other in each of the 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.

  As a result, according to the present invention, it is possible to achieve a sufficiently effective air blowing performance while reducing the thickness of the indoor unit main body.

(Best Embodiment 1)
FIGS. 1-8 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 plates) 1a and 1a serving as fan motor mounting surfaces on the rear side, side panels (side plates) 1b and 1b on the left and right end surfaces, and an intake / outlet panel (front) on the front side. Face plates) 1c and 1c, upper surface panels (top plates) 1d and 1d on the upper surface side, and lower surface panels (bottom plates) 1e and 1e on the lower surface side, respectively.

  The front side intake / blowout panels 1c and 1c of the main body casing 1 are provided with air suction ports 5 and 5 each having a circular bell mouth function at the center. In addition, turbo fans 8 and 8 having a small axial length in the depth direction are provided as centrifugal blowers inside.

  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. The turbofans 8 and 8 are installed and fixed to the rear panels 1a and 1a of the main casing 1 via the fan motors 8b and 8b. The rear panel 1a is formed in common with the back plate 16 of the drain pan 15 having a height H as shown in FIG.

  Further, a pair of left and right air heat exchanges are performed at positions corresponding to the downstream air outlets 7, 7, 7, 7 in the air passages 6, 6, 6, 6 with the turbo fans 8, 8 being sandwiched therebetween. Containers 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 heat exchangers 9, 9, 9, 9 are connected to each other in each of the pair of ventilation paths 6, 6, 6, 6 extending from the central portion in the indoor unit body casing 1 to the left and right. For example, as is clear from FIG. 3, the thickness of the indoor unit in the front-rear direction (depth dimension) while effectively ensuring the necessary heat exchange area is provided. Can be made as small as possible, and the thickness can be further reduced.

  The air heat exchangers 9, 9, 9, 9 are integrated with the drain pan 15 by accurately positioning and fixing the lower end side thereof on the drain pan 15 using a predetermined positioning member, as shown in FIG. It is supported by.

  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 in the lower part of the aluminum heat exchanger 9. Then, refrigerant pipes 21a to 21d (see FIG. 7) are connected to the refrigerant headers 20 (20a, 20b) and 20 (20a, 20b).

  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, the supercooling heat exchanger 19 is configured as a small cylindrical finned heat exchanger having a simple structure in which a spine fin 19a is wound around one heat exchange tube 21e. The heat exchange tube 21e 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, 10 are configured, for example, by attaching an aluminum wheel to the outer periphery of a synthetic resin sheet-like vacuum tube containing (filled) shape-retaining glass wool inside.

  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 of the heat exchanger is reduced, a dish-shaped drain pan 15 (bottom surface portion 15a) is provided below the pair of left and right heat exchangers 9, 9, 9, 9 and the turbo fans 8, 8. It has been. A large number of refrigerant pipes 21 a to 21 d necessary for the pair of left and right air heat exchangers 9, 9, 9, 9 are arranged using the empty space in the drain pan 15.

  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 21e in order to smoothly rectify in the direction and prevent the refrigerant from changing phase.

  Therefore, in order to meet such a demand, in the present embodiment, 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 21e) By providing the partition plates 17 and 17 between them to avoid cooling of the refrigerant pipes 21a to 21e, the shape of the partition plates 17 is made to correspond to the shape of the turbofans 8 and 8 (this embodiment The shape is flat), and the air flow performance is improved as much as possible by increasing the rectification function.

  According to such a configuration, the partition plates 17 and 17 prevent the wind from the turbofans 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 the same structure. Refrigerant phase change is prevented.

  Moreover, since the partition plates 17 and 17 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 heat exchange efficiency of the heat exchanger is also improved.

  Furthermore, in the case of 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 / blowout 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 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, the entire casing forms one cabinet structure of a flat face.

(Best Mode 2)
Next, FIG. 9 shows the configuration of the indoor unit for an air conditioner according to the second preferred embodiment of the present invention.

  In the case of this embodiment, without changing the configuration of the partition plates 17 and 17 themselves of the configuration of the best embodiment 1, for example, the rotation shafts (drive shafts) of the turbofans 8 and 8 described above, for example, FIG. As shown in FIG. 4, the distance between the air outlets of the turbofans 8 and 8 and the partition plates 17 and 17 is increased by shifting a predetermined dimension upward. (Contrast with FIG. 8).

  According to such a configuration, the wind from the turbo fans 8 and 8 and the heat exchangers 9, 9, 9, 9 is caused to flow from the refrigerant pipes 21 a to 21 b by the partition plate 17 as in the case of the first embodiment. Since it is prevented from acting on the 21e side, the phase change of the refrigerant | coolant in refrigerant | coolant piping 21a-21e is prevented.

  Similarly, since the partition plates 17 and 17 smoothly rectify the wind from the turbo fans 8 and 8 in the direction of the air outlet, the air blowing performance is improved. In the case of this embodiment, the turbo fans 8 and 8 are improved. The rotation shaft is displaced upward and the distance between the air outlet of the turbofans 8 and 8 and the partition plates 17 and 17 is increased, so that the pressure loss is reduced and the blowing efficiency is further increased. improves.

  In contrast to the above, the same effect can be obtained even if the clearance between the upper surface side panels 1d and 1d is increased by deviating the rotating shafts of the turbo fans 8 and 8 downward.

(Best Mode 3)
Next, FIG. 10 shows the configuration of an air conditioner indoor unit according to the third preferred embodiment of the present invention.

  In the case of this embodiment, the partition plates 17 and 17 having the configuration of the best embodiment 1 are curved downward in an arc shape, for example, as shown in FIG. It is characterized in that the interval between the air outlet and the partition plates 17 and 17 is increased.

  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, 9, 9, and 9 from acting on the refrigerant pipes 21a to 21e side. The phase change of the refrigerant in the refrigerant pipes 21a to 21e is prevented.

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

(Fourth Embodiment)
Next, FIG. 11 shows the configuration of the indoor unit for an air conditioner according to the fourth embodiment of the present invention.

  In the case of this embodiment, the turbo fans 8 and 8 are configured to have a scroll passage (scroll casing), and the partition plates 17 and 17 having the configuration of the best embodiment 1 are shown in FIG. As shown, it is characterized by being curved in an S shape along the shape of the scroll passage of the turbofans 8 and 8.

  Thus, when the turbofans 8 and 8 have scroll passages, the partition plates 17 and 17 are preferably curved along the passage shape of the scroll passages. Blower performance is improved.

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 longitudinal cross-sectional view which shows the internal structure which abbreviate | omitted refrigerant | coolant piping of the indoor unit. It is a longitudinal cross-sectional view which shows the internal structure of the indoor unit for air conditioners which concerns on best Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows the internal structure of the indoor unit for air conditioners which concerns on best Embodiment 3 of this invention. It is a longitudinal cross-sectional view which shows the internal structure of the indoor unit for air conditioners which concerns on the best Embodiment 4 of this invention.

Explanation of symbols

  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, 8 is a turbo fan, 9 is an air heat exchanger, 15 is a drain pan, 17 is a partition plate, and 21a to 21e are refrigerant pipes.

Claims (5)

  A box-shaped indoor unit casing, an air inlet provided in the front side center 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. A common centrifugal fan, a pair of left and right heat exchangers provided downstream of the pair of air passages corresponding to the pair of left and right air outlets, and a pair of left and right heat exchangers and a lower portion of the fan. An air conditioner indoor unit comprising a provided drain pan, wherein a partition plate is provided between the fan and heat exchanger and the drain pan.   A box-shaped indoor unit casing, an air inlet provided in the front side center 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. A common centrifugal fan, a pair of left and right heat exchangers provided downstream of the pair of air passages corresponding to the pair of left and right air outlets, and a pair of left and right heat exchangers and a lower portion of the fan. An indoor unit for an air conditioner comprising a drain pan provided and a partition plate provided between the fan and the drain pan, wherein the centrifugal fan has a rotating shaft on either the upper side or the lower side Deviate to the above Heart fan air outlet and the partition plate or an air conditioner indoor unit is characterized in that to increase the distance between the indoor unit casing top plate.   The indoor unit for an air conditioner according to claim 1, wherein the partition plate is curved to increase the distance from the air outlet of the centrifugal fan.   The indoor unit for an air conditioner according to claim 1, wherein the centrifugal fan has a scroll passage, and the partition plate is curved along a passage shape of the scroll passage.   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 air passages extending left and right from a central portion in the indoor unit casing. , 2, 3 or 4 indoor unit for air conditioner.

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