JP2002243184A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize path balance among refrigerant channels provided in a heat exchanger. SOLUTION: A heat exchanger 5 comprising a vertical section 6a, a rear inclining section 6b and a rear heat exchanger 7 is provided with a first piping 17 connecting a heat exchanger tube at the front lower end of the vertical section 6a with a heat exchanger tube at the front lower end of the rear heat exchanger 7, and a second piping 18 connecting a heat exchanger tube at the rear lower end of the vertical section 6a with a heat exchanger tube at the rear lower end of the rear heat exchanger 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to a structure of a plurality of refrigerant passages formed in an indoor heat exchanger.

[0002]

2. Description of the Related Art A conventional air conditioner is, for example, shown in FIG.
As shown in the figure, the heat exchanger 40 is composed of a vertical portion 40a, a front heat exchanger including a vertical inclined portion 40b having an upper end bent and inclined rearward, and the rear inclined portion. 4
0b is bent downward at its upper end to incline downward.
c and a rear heat exchanger formed of an inverted V-shape, and two systems of a first refrigerant flow path 41 and a second refrigerant flow path 42 are formed therein, and a blower fan is provided downstream of the heat exchanger 40. 6 are provided. The rear inclined portion 40b is provided with connection ports 41a and 42a serving as refrigerant inflow ports and connection ports 41b and 42b serving as refrigerant outflow ports during the cooling operation. The connection port 41a circulates through the lower inclined portion 40c via a connection pipe, and returns to the rear inclined section 40b via the connection pipe to be connected to the connection port 41b. The second refrigerant flow path 42 extends from the connection port 42a through the heat transfer tube of the rear inclined portion 40b to the vertical portion 40.
a, circulates through the vertical portion 40a, returns to the rear inclined portion 40b again, and is connected to the connection port 42b.

However, as shown in FIG. 3B, for example, an auxiliary heat exchanger 43 is provided on the front surface of the rear inclined portion 40b.
When the connection port 44a of the auxiliary heat exchanger 43 is set as the refrigerant inlet of the second refrigerant flow path 44, the flow path length between the first refrigerant flow path 41 and the second refrigerant flow path 44 is On the other hand, the difference in heat exchange capacity between the first refrigerant flow path 41 and the second refrigerant flow path 44 occurs due to an increase in flow path resistance to the suction air at the rear inclined portion 40b. Become. Further, for example, when a large amount of dust adheres to the back surface of the downward inclined portion 40c, the flow resistance of the downward inclined portion 40c to the suction air increases, and the first refrigerant flow path 41
The heat exchange capacity at the time 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 broken, and air having a temperature difference flows into the blower fan 6, and high-temperature air When the air is cooled by low-temperature air, dew condensation occurs on the surface of the blower fan 6. Condensed water that has condensed on the surface of the blower fan 6 may be scattered into the room from the outlet during operation, and from these points, the emergence of an air conditioner that stabilizes the path balance has been desired.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a room heat stabilizing path balance between refrigerant flow paths even when an auxiliary heat exchanger is added or a large amount of dust adheres. It is an object to provide an air conditioner having an exchanger.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a suction port at least at an upper portion of a front surface of a main body,
An outlet is provided at the lower part on the front side, and a plurality of fins arranged in parallel and a heat transfer tube orthogonal to the fins are provided in an air passage connecting the inlet and the outlet, and a front heat exchanger and a rear part are provided. In an air conditioner provided with a heat exchanger formed in an inverted V-shape with a heat exchanger, and a blower fan, the first inlet and the second inlet into which the refrigerant flows in the cooling operation during the cooling operation. The first heat exchanger and the second heat outlet are provided at the front upper portion of the heat exchanger and the first outlet and the second outlet, respectively, at which the refrigerant flows out at the rear upper portion. And two rows of heat transfer tubes, which are divided into a rear row and a rear row, respectively, wherein the heat exchanger tubes at the upper rear row of the front heat exchanger and the heat exchanger tubes at the upper front row of the rear heat exchanger are first U-shaped tubes, A heat transfer tube at the upper end of the front row of the front heat exchanger and a heat transfer tube at the upper end of the rear row of the rear heat exchanger are connected to a second U-tube. Respectively, and connects the first inlet and the heat transfer tubes in the front row of the front heat exchanger, and the first connection between the heat transfer tubes at the lower end of the front row and the heat transfer tubes at the lower end of the front row of the rear heat exchanger. Connected by piping, from the first inlet to the front heat exchanger tubes of the front heat exchanger, the first connection piping, the front heat exchanger tubes of the rear heat exchanger, the first U-shaped pipe, and the front heat exchanger While forming the first refrigerant flow path to the first outlet through the heat exchanger tubes in the rear row of the exchanger, while connecting the second inlet and the heat exchanger tubes in the front row of the front heat exchanger, the rear section The heat exchanger tubes at the lower end of the rear row of the heat exchanger and the heat exchanger tubes at the lower end of the rear row of the front heat exchanger are connected by a second connection pipe, and the heat exchanger tubes in the front row of the front heat exchanger from the second inlet port. The second U-tube, the heat exchanger tubes in the rear row of the rear heat exchanger, the second connection pipe, and the heat exchanger tubes in the rear row of the front heat exchanger It has become by forming a second refrigerant flow path to the street the second outlet constituting the.

Further, the front heat exchanger comprises a vertical portion and a rear inclined portion having an upper end bent and inclined rearward, and the rear heat exchanger comprises the rear inclined portion. Is bent downward at the upper end thereof, and the first inflow port, the second inflow port, the first outflow port, and the second outflow port are respectively provided in the rear slope portion, and the rear slope portion has While connecting the heat transfer tubes of the front row and the heat transfer tubes of the vertical portion, connecting the heat transfer tubes of the front row lower end of the vertical portion and the heat transfer tubes of the front row lower end of the rear heat exchanger with the first connection pipe, The second connection pipe connects a heat transfer tube in a rear row of the rear inclined portion and a heat transfer pipe in a rear row of the vertical section, and connects a heat transfer pipe at a rear lower end of the rear heat exchanger and a heat transfer pipe at a rear lower end of the vertical section. Are connected.

[0007] Further, the refrigerant flowing through the plurality of refrigerant flow paths flows in mutually opposing directions.

[0008]

Embodiments of the present invention will be described below in detail with reference to the accompanying 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 has a front suction port 1 at an upper portion of a front surface of a main body, an upper surface suction port 2 at an upper surface, and a plurality of wind direction deflection plates 4 at a lower portion of the front surface. 3 are provided. A plurality of fins arranged in parallel and a transmission arranged in a meandering manner so as to be orthogonal to the fins are provided in an air passage connecting the front suction port 1 and the top suction port 2 with the outlet 3. A heat exchanger 5 composed of a heat tube and a blower fan 8 for sending air heat-exchanged by the heat exchanger 5 from the outlet 3 into a room are provided.

The heat exchanger 5 has a vertical portion 6a and a rear inclined portion 6 having an upper end bent and inclined rearward.
b, and a rear heat exchanger 7 formed by bending the upper end of the rear inclined portion 6b and inclining downward to form an inverted V-shape. The vertical portion 6a, In the rear inclined portion 6b and the rear heat exchanger 7, two rows of heat transfer tubes divided into a front row and a rear row are provided, respectively, and a first refrigerant flow path 9a and a second refrigerant flow path 9b, which will be described later, Is formed. On the front side of the rear inclined portion 6b, a first inflow 10a and a second inflow port 10b serving as refrigerant inlets are provided during cooling operation, and on the rear side, a first outlet 10a serving as a refrigerant outlet is provided. Exit 2
1a and a second outlet 21b are provided respectively. The heat exchanger tubes at the upper end of the front row of the rear inclined portion 6b and the heat exchanger tubes at the upper end of the rear row of the rear heat exchanger 7 are connected to the heat exchanger tubes at the upper end of the rear row of the rear inclined portion 6b by the second U-shaped tube 12. The heat transfer tubes at the upper end of the front row of the vessel 7 are respectively connected by a first U-shaped pipe 11, and the heat transfer tubes at the lower end of the front row of the rear inclined portion 6b and the heat transfer tubes at the upper end of the front row of the vertical portion 6a are third U-shaped tubes. The fourth U-shaped tube 14 connects the heat transfer tubes at the lower end of the rear row of the rear inclined portion 6b with the heat transfer tubes at the upper end of the rear row of the vertical portion 6a. 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. A connection port 1 connected by a first connection pipe 17 and provided in a heat transfer tube at the lower rear end of the rear row of the vertical portion 6a
9 and a connection port 15 provided in a 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 plurality of bent portions.

The first refrigerant passage 9a passes from the first inlet 10a of the rear inclined portion 6b through the heat transfer tubes in the front row of the rear inclined portion 6b and the vertical portion 6a, and passes through the first connection pipe 17a.
Through the heat exchanger tubes in the front row of the rear heat exchanger 7 and from the heat exchanger tubes in the front row of the rear heat exchanger 7 to the first U-shaped pipe 11.
Through the rear inclined portion 6b to a heat transfer tube in the rear row, and is connected to the first outlet 21a. Second refrigerant passage 9
b passes from the second inflow port 10b of the rear inclined portion 6b through the second U-shaped tube 12, the heat exchanger tubes in the rear row of the rear heat exchanger 7, and the vertical connection via the second connection pipe 18. The vertical portion 6a is connected to the second row of outlets 21b via the rear row of the vertical section 6a and the rear row of the rear inclined section 6b.

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, The refrigerant flowing from the inlet 10a passes through the first refrigerant flow path 7 and exchanges heat with the heat transfer tubes in the front row of the rear inclined portion 6b and the vertical portion 6a. After flowing into the heat exchanger tubes in the front row of the rear heat exchanger 7 and exchanging heat in the rear heat exchanger 7, the first outlet 21a
Spill out of. The refrigerant flowing from the second inlet 10b flows into the second refrigerant flow path 9b, and the second U-shaped pipe 12
After the heat exchange in the rear heat exchanger tubes of the rear heat exchanger 7 through the second heat exchanger, the heat exchanger tubes flow into the rear heat exchanger tubes of the vertical portion 6a through the second connection pipe 18, and are disposed in the rear heat exchanger tubes of the vertical portion 6a. After exchanging heat with the rear heat transfer tubes of the rear inclined portion 6b, the heat flows out of the second outlet 21b.

For example, when a large amount of dust adheres to the rear surface of the rear heat exchanger 7, the flow path of the rear heat exchanger 7 with respect to the air sucked from the front suction port 2 and the upper suction port 3. The resistance increases, and the efficiency of heat exchange in the rear heat exchanger 7 decreases. At this time, in the air conditioner according to the present invention, the first refrigerant passage 9 is provided in the rear heat exchanger 7.
a and the second refrigerant flow path 9b are formed in parallel, so that the reduction in heat exchange efficiency equally affects the first refrigerant flow path 9a and the second refrigerant flow path 9b. The path balance of these refrigerant channels is maintained.

[0013]

As described above, according to the present invention,
By providing the heat exchanger consisting of the heat exchanger and the rear heat exchanger so that the first refrigerant flow path and the second refrigerant flow path intersect, dust or the like adheres to any part and heat exchange is performed. The air conditioner can maintain the path balance even if the efficiency is reduced.

[Brief description of the drawings]

FIG. 1 is a 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 a sectional view of a principal part showing another example of the heat exchanger provided in the conventional air conditioner.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front suction port 2 top suction port 3 outlet 4 wind direction deflecting plate 5 heat exchanger 6 front heat exchanger 6a vertical section 6b rear inclined section 7 rear heat exchanger 8 blower fan 9a first refrigerant flow path 9b second refrigerant Flow path 10a First inlet 10b Second inlet 11 First U-shaped pipe 12 Second U-shaped pipe 13 Third U-shaped pipe 14 Fourth U-shaped pipe 15 Connection port 16 Connection port 17 First connection pipe 18 Second connection Piping 19 Connection port 20 Connection port 21a First outlet 21b Second outlet

Claims (3)

[Claims] A plurality of fins arranged in parallel in an air passage connecting the suction port and the air outlet, wherein a suction port is provided at least at an upper portion of a front surface of the main body, and an air outlet is provided at a lower portion of the front surface. An air conditioner comprising a heat exchanger formed of an inverted V-shape with a front heat exchanger and a rear heat exchanger, and a blower fan. A first inlet and a second inlet through which the refrigerant flows are provided at the front upper part of the front heat exchanger, respectively, and a first outlet and a second outlet at which the refrigerant flows out at the rear upper part are respectively provided, The front heat exchanger and the rear heat exchanger are each provided with two rows of heat transfer tubes divided into a front row and a rear row, and the heat exchanger tubes at the upper end of the rear row of the front heat exchanger and the rear heat exchanger A first U-tube is connected to the heat transfer tube at the upper end of the front row of the The pipes and the heat transfer tubes at the upper end of the rear row of the rear heat exchanger are connected by a second U-shaped pipe, respectively, and the first inlet and the heat transfer pipes of the front row of the front heat exchanger are connected, and the lower end of the front row is connected. The heat transfer tubes, the heat transfer tubes at the lower end of the front row of the rear heat exchanger are connected by a first connection pipe, and the heat transfer pipes of the front row of the front heat exchanger and the first connection pipe from the first inflow port. A first refrigerant flow path that reaches the first outlet through the heat exchanger tubes in the front row of the rear heat exchanger, the first U-shaped pipe, and the heat exchanger tubes in the rear row of the front heat exchanger; While connecting the inflow port and the heat transfer tubes in the front row of the front heat exchanger, the heat transfer tubes at the rear row lower end of the rear heat exchanger and the heat transfer pipes at the rear row lower end of the front heat exchanger are connected by a second connection pipe. Connected, from the second inlet, heat transfer tubes in the front row of the front heat exchanger, the second U-shaped pipe, and heat transfer in the rear row of the rear heat exchanger An air conditioner comprising: a second refrigerant flow path that extends through a pipe, the second connection pipe, and a heat transfer pipe in a rear row of the front heat exchanger to reach the second outlet. 2. The front heat exchanger according to claim 1, wherein the front heat exchanger includes a vertical portion, and a rear inclined portion formed by bending an upper end of the vertical portion and inclining rearward. Is bent downward at the upper end thereof, and the first inflow port, the second inflow port, the first outflow port, and the second outflow port are respectively provided in the rear slope portion, and the rear slope portion has While connecting the heat transfer tubes of the front row and the heat transfer tubes of the vertical portion, connecting the heat transfer tubes of the front row lower end of the vertical portion and the heat transfer tubes of the front row lower end of the rear heat exchanger with the first connection pipe, The second connection pipe connects a heat transfer tube in a rear row of the rear inclined portion and a heat transfer pipe in a rear row of the vertical section, and connects a heat transfer pipe at a rear lower end of the rear heat exchanger and a heat transfer pipe at a rear lower end of the vertical section. The air conditioner according to claim 1, wherein the air conditioner is connected by: 3. The air conditioner according to claim 1, wherein the refrigerant flowing through the plurality of refrigerant flow paths flows in mutually opposite directions.