JP4862218B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner, and more particularly, to a configuration of a plurality of refrigerant channels formed in an indoor heat exchanger.
[0002]
[Prior art]
For example, as shown in FIG. 2A, a conventional air conditioner includes a vertical portion 40a and a rear inclined portion 40b that bends the upper end of the vertical portion 40a and inclines rearward. And a rear heat exchanger composed of a lower inclined portion 40c formed by bending the upper end of the rear inclined portion 40b and inclining downward, and is formed into two inverted V shapes. The first refrigerant channel 41 and the second refrigerant channel 42 are formed, and the blower fan 6 is provided on the downstream side of the heat exchanger 40. The rear inclined portion 40b is provided with connection ports 41a and 42a that serve as refrigerant inlets and connection ports 41b and 42b that serve as refrigerant outlets during cooling operation. The connection port 41a is circulated through the downward inclined portion 40c through a connection pipe, and is further returned to the rear inclined portion 40b through the connection pipe and connected to the connection port 41b. The second refrigerant flow path 42 is connected to the vertical portion 40a from the connection port 42a through the heat transfer tube of the rear inclined portion 40b, circulates through the vertical portion 40a, and returns to the rear inclined portion 40b. It is connected to the connection port 42b.
[0003]
However, as shown in FIG. 3B, for example, an auxiliary heat exchanger 43 is installed in front of the rear inclined portion 40b, and the connection port 44a of the auxiliary heat exchanger 43 is connected to the refrigerant in the second refrigerant flow path 44. When the inlet is used, the flow path length between the first refrigerant flow path 41 and the second refrigerant flow path 44 is different, while the flow path resistance against the intake air at the rear inclined portion 40b increases. A difference in heat exchange capacity occurs between the first refrigerant channel 41 and the second refrigerant channel 44. For example, when a large amount of dust adheres to the back surface of the downward inclined portion 40c, the flow resistance against the intake air of the downward inclined portion 40c increases, and the heat exchange capacity in the first refrigerant flow path 41 is increased. Will be reduced. When a difference in heat exchange capacity occurs between the first refrigerant flow path 41 and the second refrigerant flow path 44, a so-called path balance is lost, and air having a temperature difference flows into the blower fan 6, and hot air When the air is cooled by low-temperature air, condensation is generated on the surface of the blower fan 6. Condensed water that has condensed on the surface of the blower fan 6 may be scattered from the air outlet into the room during operation. From these points, the appearance of an air conditioner that stabilizes the path balance has been desired.
[0004]
[Problems to be solved by the invention]
In view of the above problems, the present invention provides an air conditioner having an indoor heat exchanger that stabilizes the path balance between refrigerant flow paths even when an auxiliary heat exchanger is added or when a large amount of dust adheres. The purpose is to provide.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a plurality of fins arranged in parallel in an air passage that connects the suction port and the air outlet by providing a suction port at the front upper portion of the main body and an air outlet at the lower portion of the front surface of the main body. And an air conditioner comprising a plurality of heat transfer tubes orthogonal to the fin and formed in a reverse V shape with a front heat exchanger and a rear heat exchanger, and a blower fan ,
The front heat exchanger is composed of a vertical portion and a rear inclined portion that is bent rearward by bending the upper end of the vertical portion, and the rear heat exchanger is disposed on the back side of the rear inclined portion. The first and second inflow ports and the first and second outflow ports are respectively provided in the rear inclined portion, and the heat transfer tubes in the front row of the rear inclined portion and the heat transfer tubes in the front row of the vertical portion And connecting the heat transfer tube at the lower end of the front row of the vertical portion and the lower end heat transfer tube of the rear row of the rear heat exchanger with a first connection pipe, while the heat transfer tube of the rear row of the rear inclined portion and the vertical portion A rear row heat transfer tube is connected, and a heat transfer tube at the lower end of the front row of the rear heat exchanger and a heat transfer tube at the lower end of the rear row of the vertical portion are connected by a second connection pipe .
[0007]
Further, the refrigerant flowing through the plurality of refrigerant channels flows in opposite directions.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.
FIG. 1 is a sectional view showing an air conditioner according to the present invention.
As shown in FIG. 1, the air conditioner according to the present invention is provided with a front suction port 1 on the upper front surface of the main body, an upper suction port 2 on the upper surface, and a plurality of wind direction deflecting plates 4 on the lower front surface. 3 is provided. In the air passage connecting the front suction port 1 and the upper suction port 2 and the blower outlet 3, a plurality of fins arranged in parallel and a transmission arranged in a meandering manner so as to be orthogonal to the fins. A heat exchanger 5 composed of a heat pipe, and a blower fan 8 for sending the air heat-exchanged by the heat exchanger 5 into the room from the outlet 3 are provided.
[0009]
The heat exchanger 5 includes a front heat exchanger 6 including a vertical portion 6a and a rear inclined portion 6b that is bent backward at the upper end of the vertical portion 6a, and an upper end of the rear inclined portion 6b. Is formed in an inverted V shape with the rear heat exchanger 7 which is bent downward and inclined downward, and is divided into the vertical row 6a, the rear inclined portion 6b and the rear heat exchanger 7 into a front row and a rear row. The two rows of heat transfer tubes thus formed are respectively arranged, and these form a first refrigerant channel 9a and a second refrigerant channel 9b, which will be described later. A first inflow 10a and a second inflow port 10b serving as refrigerant inlets are provided on the front side of the rear inclined portion 6b during cooling operation, and a first flow serving as a refrigerant outlet is provided on the rear side. An outlet 21a and a second outlet 21b are provided respectively. The heat transfer tube at the upper end of the front row of the rear inclined portion 6b and the heat transfer tube at the upper end of the rear row of the rear heat exchanger 7 are exchanged with the heat transfer tube at the upper end of the rear row of the rear inclined portion 6b by the second U-shaped tube 12. The heat transfer tube at the upper end of the front row of the vessel 7 is connected by a first U-shaped tube 11, and the heat transfer tube at the lower end of the front row of the rear inclined portion 6b and the heat transfer tube at the upper end of the front row of the vertical portion 6a are third U-shaped tubes. 13, the heat transfer tubes at the lower end of the rear row of the rear inclined portion 6b and the heat transfer tubes at the upper end of the rear row of the vertical portion 6a are connected by the fourth U-shaped tube 14, respectively. Further, the connection port 20 provided in the heat transfer tube at the lower end of the front row of the vertical portion 6a and the connection port 16 provided in the heat transfer tube at the lower end of the front row of the rear heat exchanger 7 had a plurality of bent portions. There are a plurality of connection ports 19 connected to the first connection pipe 17 and provided in the heat transfer tube at the lower end of the rear row of the vertical portion 6a, and a plurality of connection ports 15 provided in the heat transfer tube at the lower end of the rear row of the rear heat exchanger 7. Are connected by a second connection pipe 18 having a bent portion.
[0010]
The first refrigerant flow path 9a passes from the first inflow port 10a of the rear inclined portion 6b through the heat transfer pipe in the front row of the rear inclined portion 6b and the vertical portion 6a, and passes through the first connection pipe 17 to the rear heat. Leading to the heat transfer tube in the front row of the exchanger 7, from the heat transfer tube in the front row of the rear heat exchanger 7 to the heat transfer tube in the rear row of the rear inclined portion 6b via the first U-shaped tube 11, and the first outlet 21a. The second refrigerant flow path 9b passes from the second inlet 10b of the rear inclined portion 6b through the second U-shaped tube 12 to the rear heat transfer tube of the rear heat exchanger 7 and passes through the second connection pipe 18. And connected to the second outlet 21b via a rear heat transfer tube of the vertical portion 6a and a rear heat transfer tube of the rear inclined portion 6b.
[0011]
As shown by the arrows in FIG. 1, during the cooling operation, the refrigerant flows into the heat exchanger 5 from the first inlet 10a and the second inlet 10b of the rear inclined portion 6b, and from the first inlet 10a. The refrigerant that has flowed in passes through the first refrigerant flow path 7, exchanges heat with the heat transfer tubes in the front row of the rear inclined portion 6 b and the vertical portion 6 a, and then exchanges the rear heat with the first connection pipe 17. After flowing into the heat transfer tubes in the front row of the heat exchanger 7 and exchanging heat with the rear heat exchanger 7, the heat flows out from the first outlet 21a. The refrigerant flowing in from the second inlet 10b flows into the second refrigerant flow path 9b, exchanges heat with the heat transfer tubes in the rear row of the rear heat exchanger 7 through the second U-shaped tube 12, and then After flowing into the rear heat transfer tube of the vertical portion 6a through the two connection pipe 18, heat exchange is performed between the rear heat transfer tube of the vertical portion 6a and the rear heat transfer tube of the rear inclined portion 6b. It flows out from the outflow port 21b.
[0012]
For example, when a large amount of dust adheres to the rear surface of the rear heat exchanger 7, the flow resistance of the rear heat exchanger 7 to the air sucked from the front suction port 2 and the upper suction port 3 increases. In addition, the efficiency of heat exchange in the rear heat exchanger 7 is reduced. At this time, in the air conditioner according to the present invention, the first refrigerant flow path 9a and the second refrigerant flow path 9b are formed in parallel in the rear heat exchanger 7, thereby The decrease in efficiency equally affects the first refrigerant flow path 9a and the second refrigerant flow path 9b, and maintains the path balance of these refrigerant flow paths.
[0013]
【Effect of the invention】
As described above, according to the present invention, any one of the heat exchangers including the heat exchanger and the rear heat exchanger can be provided by crossing the first refrigerant channel and the second refrigerant channel. Even if dust or the like adheres to this part and the efficiency of heat exchange decreases, the air conditioner can maintain the path balance.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an air conditioner according to the present invention.
FIG. 2A is a cross-sectional view of a main part showing an example of a heat exchanger provided in a conventional air conditioner.
(B) is principal part sectional drawing which shows the other example of the heat exchanger with which the air conditioner by a prior art example was equipped.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front suction port 2 Upper surface suction port 3 Outlet 4 Wind direction deflecting plate 5 Heat exchanger 6 Front heat exchanger 6a Vertical part 6b Back inclination part 7 Rear heat exchanger 8 Blower fan 9a First refrigerant flow path 9b Second refrigerant Channel 10a First inlet 10b Second inlet 11 First U-shaped tube 12 Second U-shaped tube 13 Third U-shaped tube 14 Fourth U-shaped tube 15 Connection port 16 Connection port 17 First connection piping 18 Second connection Piping 19 Connection port 20 Connection port 21a First outlet 21b Second outlet

Claims (2)

The main body is provided with a suction port at the front upper part and a blower outlet at the lower front part, and a plurality of fins arranged in parallel in the air passage connecting the suction port and the blower outlet, and a plurality of transmissions orthogonal to the fins. In an air conditioner comprising a heat exchanger and a heat exchanger formed in an inverted V shape with a front heat exchanger and a rear heat exchanger, and a blower fan,
The front heat exchanger is composed of a vertical portion and a rear inclined portion that is bent rearward by bending the upper end of the vertical portion, and the rear heat exchanger is disposed on the back side of the rear inclined portion. The first and second inflow ports and the first and second outflow ports are respectively provided in the rear inclined portion, and the heat transfer tubes in the front row of the rear inclined portion and the heat transfer tubes in the front row of the vertical portion And connecting the heat transfer tube at the lower end of the front row of the vertical portion and the lower end heat transfer tube of the rear row of the rear heat exchanger with a first connection pipe, while the heat transfer tube of the rear row of the rear inclined portion and the vertical portion An air conditioner comprising: a heat transfer tube connected to a rear row; and a heat transfer tube at a lower end of the front row of the rear heat exchanger and a heat transfer tube located at the lower end of the rear row of the vertical portion are connected by a second connection pipe .   The air conditioner according to claim 1, wherein the refrigerant flowing through the plurality of refrigerant flow paths flows in opposite directions.

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