JP5823881B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner that harmonizes air taken in from a front suction port and a top surface suction port of a cabinet and discharges the air into the room from a blowout port.

  Conventionally, in this type of air conditioner, in order to reduce the air discharged from the air outlet from being sucked into the front air inlet, Japanese Patent Application Laid-Open No. 2005-133867 discloses whether the air guide portion protrudes forward from the upper wall surface of the air outlet. Or the groove part is formed and the device which cut | disconnects the Coanda effect which the air discharged | emitted from the blower outlet flows along the front surface of a cabinet is made | formed.

  Similarly, in Patent Document 2, a short circuit prevention portion is provided between the lower suction port and the lower air outlet, and the short circuit prevention portion protrudes forward between the lower air inlet and the lower air outlet. And a protrusion protruding downward from the upper surface of the inner wall of the lower outlet.

JP 2004-69127 A JP 2007-183011 A

  By the way, in patent document 1, since the front suction port exists in the upper part, even if the air discharged | emitted from the lower blower outlet flows along the front surface of a cabinet, the short circuit of the air flow is prevented in a baffle part or a groove part. be able to.

  In Patent Document 2, since there is a suction port at the lower part of the cabinet, in order to prevent the air discharged from the lower lower outlet from flowing along the cabinet, the projecting part is projected downward, Since the front edge protrudes forward, it cannot be said that the appearance is good and the air blowing efficiency is not good.

  The present invention is an air conditioner having a front suction port in the lower part, an air conditioner that can reduce a short circuit in which air discharged from the blower outlet flows to the front suction port side, and has excellent blowing efficiency, In addition, the object is to provide an air conditioner that also has a good appearance.

In order to achieve the above object, an air conditioner according to the present invention includes an indoor heat exchanger in a cabinet having a front panel and a front cover, and the cabinet is provided with a front inlet and a top inlet. The front suction port is formed between the lower end of the front cover and the front panel behind it, and a drain pan that collects condensation that has fallen from the indoor heat exchanger is provided behind the front panel. An air conditioner configured such that indoor air sucked from a suction port is conditioned through an indoor heat exchanger and discharged from a blower outlet formed in a front lower portion of the front panel, upper wall, in its front part, blowing guide wall is formed which is inclined such that the upper toward forward, the stepped recessed is front toward the front of the blower guide wall is formed, the bottom wall of the drain pan Between the front extended end of the bottom wall of the drain pan and the blower outlet open end of the front panel joined to the drain pan, the front open end of the front panel on the drain pan side The step is formed to overlap so as to be hidden, and by this step , the conditioned air discharged from the blowout port is reduced from flowing toward the front suction port and flows in the extending direction of the air blowing guide wall. Features.

  According to the above configuration, the air from the air outlet is discharged forward, and a part of the air is directed upward along the air blowing guide wall on the upper wall of the air outlet, but there is a step whose front side is recessed toward the front of the air blowing guide wall. Since it is formed, it is possible to cut off the flow of air that tends to flow from the air guide wall to the front suction port along the front panel, thereby reducing the short circuit.

  At this time, since the step is formed in the middle of the air blowing guide wall of the upper wall of the air outlet, unlike the protrusions and grooves formed on the front side of the cabinet as in Patent Documents 1 and 2, on the appearance Appearance is also good.

  In particular, it is also possible to employ a configuration in which the air guide panel is provided at the outlet so as to be openable and closable, and the step is hidden by the air guide panel when the air guide panel is closed. According to this configuration, the step is hidden by the wind guide panel and cannot be seen, so that the appearance is further improved.

  Such a step can also be formed as follows. That is, a drain pan that collects condensation that has fallen from the indoor heat exchanger is provided behind the front panel, and the bottom wall of the drain pan is an air guide wall that corresponds to the upper wall of the outlet, and the front of the bottom wall of the drain pan The step is formed between the extended end and the opening end on the outlet side of the front panel joined to the extended end.

  According to the above configuration, since the step is formed by joining both the drain pan formed as a separate member from the front panel and the opening end constituting the air outlet of the front panel, a simple configuration with two members Thereby, the short circuit of the conditioned air which flows from a blower outlet to a front inlet port can be reduced.

  Further, the step may be formed by overlapping one of both members. In this case, it is possible to exemplify an example in which the air outlet opening end of the front panel is overlapped so as to be hidden behind the drain pan side forward extension end to form a step.

In the above structure, since the overlap both in a state recessed from the front extended end of the drain pan side air outlet opening end of the front panel, depressed from the air guide wall of the front extension end is extended forward from the bottom wall of the drain pan The air flow can be cut off by the step. Therefore, it is possible to prevent the air blowing efficiency from being lowered without the air blowing being blocked by the projections or the like as in Patent Document 2.

  However, since the front panel is in contact with the air sucked into the front suction port side, and the bottom wall of the drain pan is in contact with the air sent out from the outlet, the front panel and the drain pan are in contact with each other. Condensation is likely to occur due to the temperature difference from the drain pan.

  Therefore, it is also possible to adopt a configuration in which a heat insulating space is formed between the front wall of the drain pan and the front panel, and further, a presser rib that contacts the back side of the front panel is provided in the heat insulating space. It is possible to prevent the front panel from condensing due to the heat insulating space, and further, it is possible to maintain a gap between the front panel and the front wall of the drain pan by the pressing rib provided in the heat insulating space.

  Moreover, you may make it the lower part of the front extension end by the side of a drain pan be formed with a heat insulating material. By doing in this way, it becomes difficult to produce dew condensation at the front extension end.

  As described above, according to the present invention, the upward air flow along the air guide wall on the upper wall of the air outlet is blocked by the step formed near the front of the air guide wall, and formed below the front panel. It is possible to reduce the short circuit of the air flow to the front suction port.

It is an external appearance perspective view which shows the closed attitude | position of the wind guide panel in the indoor unit of the air conditioner in this embodiment. It is side surface sectional drawing of FIG. It is an external appearance perspective view which similarly shows the front blowing opening attitude | position of the wind guide panel in an indoor unit. FIG. 4 is a side sectional view of FIG. 3. It is an external appearance perspective view which similarly shows the downward blowing open attitude | position of the wind guide panel in an indoor unit. It is side surface sectional drawing of FIG. It is a principal part expanded sectional view which shows the upper opening attitude | position of the wind guide panel of FIG. It is an external appearance perspective view which shows a front part drain pan. It is a principal part expanded sectional view in the upper opening attitude | position of the wind guide panel which is another embodiment.

  Embodiments according to the present invention will be described with reference to the drawings. In this embodiment, an indoor unit of a separate type air conditioner will be described as an example. This type of air conditioner includes an indoor heat exchanger housed in an indoor unit, a compressor, a four-way valve, an outdoor heat exchanger, and a throttle device (both not shown) housed in an outdoor unit (not shown). Are connected by a refrigerant pipe to constitute a refrigeration cycle, and various operation modes such as cooling, heating and dehumidification can be executed.

  As shown in FIG. 1 and FIG. 2, the indoor unit has a top surface suction port 2 for sucking room air on the top surface of the cabinet 1, and a front suction port 3 for sucking room air at the front center portion of the cabinet 1. Furthermore, the blower outlet 4 is formed in the opening below the front surface of the cabinet 1. When the cabinet 1 is viewed from the front, the width direction is the left-right direction, the depth direction of the cabinet 1 is the front-rear direction, and the height direction of the cabinet is the vertical direction.

  As shown in FIG. 2, the cabinet 1 includes a box-shaped back plate 8 whose front surface is open and a box-shaped front panel 9 whose back surface is opened to form an exterior.

  As shown in FIG. 2, an air passage 5 is formed in the cabinet 1 from the top suction port 2 and the front suction port 3 to the blowout port 4. An indoor heat exchanger 6 and a fan 7 are formed in the air passage 5. And are arranged.

  In the indoor heat exchanger 6, three heat exchangers of the front side heat exchangers 6a and 6b and the back side heat exchanger 6c are arranged in an inverted V shape. The front-side heat exchangers 6a and 6b include an upper heat exchanger 6a and a lower heat exchanger 6b, and are arranged so that the upper end of the upper heat exchanger 6a is inclined backward, and is continuous with the lower end thereof. The lower heat exchanger 6b is arranged substantially vertically. The upper heat exchanger 6b is disposed at the same height as the rear heat exchanger 6c, and both heat exchangers are disposed in an inverted V shape in a side view.

  In addition, the number of heat exchangers is not limited to the three heat exchangers shown in FIG. 2, but an aspect in which one is arranged on each of the front side and the back side, and an auxiliary heat exchanger is further provided on the back side. A mode in which a total of four heat exchangers are additionally arranged can be exemplified.

  The fan 7 is a cross flow fan and is disposed in a space surrounded by the indoor heat exchanger 6 on the downstream side of the air passage 5.

  On the downstream side of the fan 7 in the air passage 5, air blowing guide walls are formed on both the front and rear sides so that the air blown from the fan 7 is guided from the blower outlet 4 to the opening at the lower front of the cabinet 1.

  The back plate 8 that constitutes the cabinet 1 is a box-like one with an open front surface, and a flat surface is formed on the back side thereof for attachment to a wall surface in the room. On the front side of the back plate 8, there is a rear air guide wall 10 formed in a concave curved surface so as to guide the air from the fan 7 forward. The top surface of the back plate 8 has a lattice-shaped suction grill 11 that forms a part of the top surface suction port 2.

  The front panel 9 has a box-like shape with an open rear surface, and the entire top surface of the front panel 9 is opened, and a lattice-shaped suction grill 13 is formed in the opening. The lattice-shaped suction grill 13 is arranged in parallel with the suction grill 11 on the back plate 8 side, and the top suction port 2 is configured by both the suction grills 11 and 13.

  A front opening 9a is formed on the front surface of the front panel 9 so as to face the front heat exchangers 6a and 6b. A front cover 14 is supported by the front panel 9 so as to be able to open and close around an upper end axis so as to cover the front opening 9a.

  The front cover 14 has a flat plate shape, the width in the left-right direction is substantially equal to the horizontal width of the cabinet 1, and the height is set to a height that covers the front opening 9a of the cabinet.

  The front panel 9 is lower than the front cover 14 at the front lower portion thereof and recedes in an arc shape in a side view to reach the bottom wall portion 16. A louver unit 17 constituting the air outlet 4 is fitted into the opening formed in the arc surface.

  The louver unit 17 constitutes a part of the wind direction changing device. As shown in FIGS. 2 and 8, the louver unit 17 has a peripheral member 18 that forms the air outlet 4 in the center, and a horizontal axis in front of the air outlet 4. And a plurality of vertical louvers 20 that are swingably disposed at the outlet 4 on the rear side of the wind guide panel 19.

  Further, in this example, a lateral louver 21 is integrally disposed inside the air guide panel 19. The wind guide panel 19 can be opened and closed between the closed posture shown in FIGS. 1 and 2 and the open posture shown in FIGS. FIG. 3 and FIG. 4 show the front blowing posture of the wind guide panel 19, and the conditioned air discharged from the outlet 4 by turning the upper end of the wind guide panel 19 forward from the closed posture around the rotation axis. Can be guided diagonally forward and upward.

5 and 6 show the lower blow open posture of the wind guide panel 19, the upper end of the wind guide panel 19 by the front outlet further rotates downward from Hirakisugata bias of FIGS. 3 and 4, the wind guide panel 19 The conditioned air discharged from the blower outlet 4 can be guided obliquely downward using the front surface.

  The peripheral member 18 of the louver unit 17 constitutes a part of the front and rear ventilation guide walls, and the upper peripheral member is formed in an open U shape in cross section and collects the condensation that has fallen from the indoor heat exchanger 6. 22 is constituted. Among the peripheral members 18, the lower peripheral member constitutes a rear air blowing guide wall continuously to the front end of the rear guide wall 10 on the back plate 8 side.

  Moreover, the heat insulating material 23 is affixed inside the drain pan 22, The lower end part of the lower side heat exchanger 6b is arrange | positioned among the front surface side heat exchangers 6a and 6b above this heat insulating material. In the drain pan 22, the air blowing guide wall on the front side of the air passage 5 is constituted by the wall surface and the bottom wall surface thereafter. The fan 7 is disposed with a gap between the rear wall surface of the drain pan 22 and the rear guide wall 10 on the back plate 8 side.

  A filter 15 is detachably disposed between the rear surface of the top surface suction port 2 of the front panel 9 and the rear surface side of the front opening of the front panel and the indoor heat exchanger 6. The filter 15 can be removed from the front surface of the front panel 9 by opening the front cover 14.

  As shown in FIG. 2, the lower opening wall 35 of the front opening 9 a of the front panel 9 is a vertical wall, and a receiving portion 39 that protrudes rearward and can place the filter 15 is provided at the lower end of the vertical wall. It has been. A concave curved surface portion 40 is formed at the lower end of the lower opening wall 35 of the front opening 9a so as to protrude inward of the cabinet 1. The concave curved surface portion 40 is formed so as to prevent the wind blown from the air outlet 4 from returning from the upper front suction port 3 into the cabinet 1, and the lower end of the concave curved surface portion 40 is used to reduce a short circuit. A step 41 having a recessed front side is formed.

  The front suction port 3 is formed so as to face the lower portions of the front side heat exchangers 6a and 6b so that an opening can be seen in a front view. The room air is guided to the front side heat exchangers 6a and 6b through an opening formed between the wall 35 and the step in the front-rear direction.

  The front cover 14 is disposed in front of the front opening 9a, and the lower end of the front cover 14 is disposed in front of the lower opening wall 35 of the front opening 9a, thereby forming an opening with a step in the front-rear direction. The

  Further, a gap A is formed in the vertical direction between the lower end of the front cover 14 and the upper end of the lower opening wall 35 of the front opening 9a, and the front side heat exchanger 6a inside from the front in front view through the gap A. , 6b can be seen. Then, the air sucked from the front through the gap A is straightly moved in the horizontal direction and applied to the front side heat exchangers 6a and 6b.

  Furthermore, a concave curved surface portion 40 is formed on the lower side of the lower opening wall 35 of the front opening 9a, and a lower portion of the concave curved surface portion 40 is an opening for the air outlet of the front panel 9. The louver unit 17 is fitted into the opening. A drain pan 22 is disposed behind the concave curved surface portion 40 of the front panel 9.

  As shown in FIG. 7, the bottom wall 22 a of the drain pan 22 has a front extension wall 42 protruding at the front end thereof, and the bottom wall 22 a and the front extension wall 42 constitute the upper wall of the outlet 4. The bottom wall 22a goes diagonally downward, but is bent in an R shape upward at the front portion of the bottom wall 22a, and as a whole, on the front extension wall 42 side, the air outlet is inclined upward so as to go forward. It is considered as a ventilation guide wall.

  A step 41 is formed on the front side of the air blowing guide wall on the upper side of the air outlet 4 by the front extended end 42a of the bottom wall 22a and the air outlet opening end 43 of the front panel 9 (concave curved surface portion 40) joined thereto. Has been. The step 41 is in a state in which the air outlet opening end 43 of the front panel 9 on the front side is recessed from the front extension end 42a of the drain pan 22, and the conditioned air discharged from the air outlet 4 by the step 41 is the front air inlet. 3 is reduced, and it is made to flow to the extension direction of a ventilation guide wall.

  In other words, the step 41 is formed in a step shape so as to be recessed upward from the front extension wall 42. The corner portion of the step 41 has a shape that cuts off the Coanda effect in which the released conditioned air tends to flow from the front extension wall 42 along the wall surface of the front panel 9. For example, the shape of the corner is preferably an acute angle or a right angle. Thereby, the Coanda effect is easily cut off. In this example, the angle is a right angle. The corner does not mean a right angle or an acute angle, but may have a roundness that is inevitably attached when a mold is created.

Further, the air outlet opening end 43 of the front panel 9 is disposed so as to be hidden by the front extension end 42a of the front extension wall 42 on the drain pan 22 side, and the step 41 is formed. An engagement claw 45 projecting rearward is formed at the end 42a of the front extension wall 42 so as to engage with the air outlet opening end 43 of the front panel 9. Further, as shown in FIG. 7, a strip-shaped heat insulating material 48 is attached to the tip of the front extension wall 42 of the drain pan 22 to form a part of the step 41. This heat insulating material 48 makes it difficult for condensation to form at the tip of the front extension wall 42.

  Further, a heat insulating space portion 46 is formed between the front surface 22 b of the drain pan 22 on the back surface side of the concave curved surface portion 40 of the front panel 9, and a presser rib that contacts the heat insulating space portion 46 on the back surface side of the front panel 9. 47 is provided. As shown in FIG. 8, a plurality of the presser ribs 47 are arranged at intervals in the left-right direction.

  In this example, the step 41 is formed by two members, that is, the end 42 a of the front extension wall 42 of the bottom wall 22 a of the drain pan 22 and the outlet opening end 43 of the front panel 9. The bottom wall 22a of 22 may be formed alone.

  Further, the step 41 is arranged so as to be hidden by the wind guide panel 19 in a closed posture of the wind guide panel 19 and forms a good appearance.

  In the above configuration, by driving the fan 7, the indoor air is led to the indoor heat exchanger 6 through the filter 15 from the top suction port 2 of the cabinet 1 and the front suction port 3 formed at the lower end of the front cover 14. Heat exchange is performed with the refrigerant flowing through the indoor heat exchanger 6, and the conditioned air subjected to heat exchange is discharged into the room through the air outlet 5 through the air passage 5 in the cabinet 1.

At this time, conditioned air is discharged forward through the bottom wall 22a of the drain pan 22 and the front extension wall 42 thereof. The released conditioned air tends to flow along the wall surface of the front panel 9 to the front suction port 3 side above the wall surface of the front panel 9 due to the Coanda effect, but the front extension end 42 a of the front extension wall 42 is connected to the front panel 9. Since the step 41 is formed between them, the Coanda effect is cut off by the step 41 and the flow of conditioned air that flows to the front suction port 3 is blocked. Therefore, the short circuit through which conditioned air flows from the blower outlet 4 to the front inlet 3 side can be reduced as much as possible.

  Further, since the step 41 is formed by the drain pan 22 and the front panel 9, the height of the step can be finely adjusted by finely adjusting the positional relationship between the drain pan 22 and the front panel 9. By doing so, it is possible to reduce the possibility of correcting the mold for correcting the step.

  Further, as shown in FIG. 7, a heat insulating material 48 may be attached to the tip of the front extension wall 42 of the drain pan 22 to form a part of the step 41. Thereby, dew condensation hardly occurs at the tip of the front extension wall 42.

  Further, the step 41 is formed so that the front extended end 42a on the drain pan 22 side overlaps with the outlet opening end 43 of the front panel 9, so that the release of conditioned air is limited compared to the case where the protrusions protrude downward. Without lowering, it is possible to prevent a reduction in blowing efficiency.

  Further, as shown in FIG. 2, the step 41 is hidden by the wind guide panel 19 in the closed posture of the wind guide panel 19, so that the appearance is also excellent.

  Furthermore, since the heat insulating space 46 is formed between the front wall 22b of the drain pan 22 and the front panel 9, the drain pan 22 is in contact with room air on the front side and serves as a conditioned air blowing guide wall on the back side. It is possible to prevent the front panel 9 from condensing under the influence of temperature.

Further, since the presser rib 47 that contacts the back side of the front panel 9 is provided in the heat insulating space 46, the gap between the front panel 9 and the front wall 22b of the drain pan 22 can be physically maintained.

  In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added within the scope of the present invention. For example, in FIG. 7, the heat insulating material 48 is attached to the front extension wall 42 of the drain pan 22 to form a part of the step 41, but not limited to this, the heat insulating material is attached as shown in FIG. 9. Instead, the step 41 may be formed by thickening the front extension wall 42 of the drain pan 22. Further, instead of forming a step between the front panel 9 and the drain pan 22, a step may be formed by denting the front extension wall 42 of the drain pan.

DESCRIPTION OF SYMBOLS 1 Cabinet 2 Top surface inlet 3 Front inlet 4 Outlet 5 Air passage 6 Indoor heat exchanger 6a, 6b Front side heat exchanger 6c Rear side heat exchanger 7 Fan 8 Back plate 9 Front panel 9a Front opening 10 Rear side Air blow guide wall 11 Suction grill 13 Suction grill 14 Front cover 15 Filter 17 Louver unit 18 Peripheral member 19 Air guide panel 20 Vertical louver 21 Horizontal louver 22 Drain pan 22a Bottom wall 22b Front wall 35 Lower mouth wall 40 Concave curved surface portion 41 Step 42 Front extension wall 42a Front extension end 43 Air outlet opening end 45 Engagement claw 46 Heat insulation space 47 Pressing rib 48 Heat insulation material

Claims (4)

An indoor heat exchanger is installed in a cabinet equipped with a front panel and a front cover, and the cabinet is provided with a front suction port and a top surface suction port, and the front suction port is connected to the lower end of the front cover and the front panel behind it. A drain pan is formed behind the front panel to collect condensation that has fallen from the indoor heat exchanger, and the indoor air drawn from the front and top air inlets is harmonized through the indoor heat exchanger. An air conditioner configured to be discharged from a blower outlet formed at the front lower portion of the front panel, wherein an upper wall of the blower outlet becomes higher at the front part as it goes forward. An air flow guide wall that is inclined to the front, and a step with a recessed front side is formed near the front of the air flow guide wall,
The bottom wall of the drain pan is a part of the air blowing guide wall, and the front panel air outlet opening end is formed between the front extended end of the drain pan bottom wall and the front panel air outlet opening end joined thereto. The step is formed by overlapping so as to be hidden behind the front extended end on the drain pan side,
An air conditioner characterized in that the conditioned air discharged from the air outlet is reduced from flowing toward the front suction port by the step and flows in the extending direction of the air blowing guide wall.  The air conditioner according to claim 1, wherein an air guide panel is provided at the air outlet so as to be openable and closable, and the step is hidden by the air guide panel when the air guide panel is closed. The heat insulation space part is formed between the front wall and front panel of the said drain pan, The pressing rib which contact | abuts to the back surface side of a front panel is provided in the said heat insulation space part, The Claim 1 or 2 characterized by the above-mentioned. Air conditioner. The air conditioner according to any one of claims 1 to 3 , wherein a lower portion of the front extension end on the drain pan side is formed of a heat insulating material.

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