JPH0849913A - Air-conditioner - Google Patents

Abstract

PURPOSE:To enhance the reliability by providing a heat exchanger formed in an inverted V shape, increasing the strength of the exchanger, and holding the effect as the inverted V shaped exchanger. CONSTITUTION:An inverted V shape heat exchanger 15 bent at its upper part at an acute angle and formed of a front side heat exchanger 15B and a rear side heat exchanger 15A is provided in a unit body 10, and the rear side exchanger and the front side exchanger are coupled fixedly by jump pipes 28, 31. These pipes form the parts of refrigerant passages for feeding refrigerant between the front side exchanger and the rear side exchanger.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to an air conditioner having a heat exchanger formed in an inverted V shape and constituting, for example, an indoor unit.

[0002]

2. Description of the Related Art A commonly used air conditioner comprises an indoor unit arranged in an air-conditioned room and an outdoor unit arranged outdoors, and these units are connected by a refrigerant pipe and electric wiring. .

From the user side, there is a great demand for miniaturization of these units and reduction of the installation space, and each maker must increase the heat exchange capacity while satisfying such conditions.

As one of the solutions, in particular, in an indoor unit, a structure in which heat exchangers are formed by bending in multiple stages is proposed, and the height dimension of the heat exchanger itself is suppressed while securing a heat exchange area, The height of the unit body has been reduced.

[0005]

For example, the applicant of the present invention has proposed a heat exchanger A as shown in FIG. This is because a large number of radiating fins 1 ... Are arranged side by side with a small gap in the direction perpendicular to the paper surface, and a plurality of heat exchange pipes 2 ... Insert in parallel. The U-bends 3 are connected to the open ends of the adjacent heat exchange pipes 2 and 2 and are of the so-called find tube type.

However, the heat exchanger A is bent in an inverted V shape in a side view and is composed of a front heat exchanger 4 and a rear heat exchanger 5. Further, the front-side heat exchanger 4 is bent in multiple stages to keep the distance between the front-side heat exchanger 4 and the blower 6 arranged between the rear-side heat exchanger 5 as uniform as possible. With such a heat exchanger A, most of the above conditions can be satisfied.

The problem is that, unlike the conventional flat plate-shaped heat radiating fin, the heat exchanger A is largely bent in an inverted V shape to be almost divided into two parts. 5. Mutually strong anxiety remains.

That is, in this heat exchanger A, the connecting portion (cutting portion) 7 of the bent front and rear heat exchangers 4 and 5 is formed.
The maximum strength is applied to the front and rear heat exchangers 4 and 5, but there are two rows of U bends 8 at the ends of the connecting portion 7 of the front and rear heat exchangers 4 and 5.
No means for connecting and fixing the front and rear heat exchangers is provided, except that a and 8b are connected.

The heat exchanger A itself having the above construction, the uppermost end and the lowermost end of the front heat exchanger 4 and the lowermost end of the rear heat exchanger 5 are attached and fixed to a heat exchanger base not shown here. However, it is not possible to fix it at other parts in space.

Therefore, it is particularly desired to increase the connection strength between the front side heat exchanger 4 and the rear side heat exchanger 5. Since the front side heat exchanger 4 is bent in multiple stages, a force to return it to its original shape of a straight line acts, so an effective structure for preventing this must also be considered. I have to.

Further, the heat exchange pipes 2 are provided in parallel in two rows, that is, on the windward side of the radiating fins 1 where the heat exchange air is introduced and on the leeward side where the heat exchange air is discharged. During the cooling operation, the refrigerant is introduced into the windward row of the front heat exchanger 4 in a branched state.

From here, one is led to the lowermost end along the windward row of the front side heat exchanger 4, and is led to the outside from this middle portion while turning to the leeward row. The other is the front side heat exchanger 4
From the uppermost end to the leeward row of the rear heat exchanger 5 through the U-bend 8a, from the lowermost end to the leeward row, and again through the U-bend 8b to the leeward row of the front heat exchanger. And is led to the outside from this intermediate part.

Naturally, during the heating operation, the refrigerant is guided in the opposite direction to the above-mentioned refrigerant flow. And in such a thing, the flow of the refrigerant becomes two kinds which mainly flow through the front side heat exchanger 4 and the rear side heat exchanger 5 with different wind speeds, and the heat exchange amount of each flow differs, and the heat exchanger A However, there was a problem that the heat exchange efficiency as a result deteriorates.

Further, during heating, a large amount of undercool, which is a supercooled state, cannot be taken in each flow, and the heat exchange efficiency is low. The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a heat exchanger formed in an inverted V shape to increase the strength of the heat exchanger. The present invention intends to provide an air conditioner that maintains the effect as a V-shaped heat exchanger and improves reliability. A second object is to provide an air conditioner that has an optimal flow path configuration for an inverted V-shaped heat exchanger to improve heat exchange efficiency.

[0015]

In order to satisfy the first object, the air conditioner of the first invention is, in claim 1, an air conditioner main body, and the air conditioner main body is arranged in the air conditioner main body. The upper part thereof is bent into an acute angle to form an inverted V shape in a side view, and is composed of a front side heat exchanger located on the front side of the air conditioner body and a rear side heat exchanger located on the rear side. A heat exchanger provided with a jump pipe that constitutes a part of a refrigerant flow path that conducts the refrigerant between the heat exchangers of the rear surface side and the front surface side heat exchanger. It is characterized by

According to a second aspect of the present invention, there are a plurality of the jump pipes according to the first aspect, and midpoints of the jump pipes intersect each other. In claim 3, the front side heat exchanger according to claim 1 is provided with a plurality of notches, is bent in multiple steps along the notches, and straddles the bent notches along with the jump pipe. A U-bend that constitutes a part of the refrigerant flow path is connected, and one end of the jump pipe is connected to a lowermost end of a free portion (non-fixed portion) of the front heat exchanger.

In order to satisfy the second object, the air conditioner of the second invention is, as claim 4, an air conditioner main body having a front suction port, an upper suction port, and a blowout port on the lower front surface. The air conditioner is arranged inside the air conditioner body, and the upper part thereof is bent into an acute angle to form an inverted V shape in a side view. The heat exchanger is located on the front side and the rear side of the air conditioner body. Is arranged between the front side heat exchanger and the rear side heat exchanger constituting the heat exchanger, and the heat exchange air is sucked into the front portion. A blower blown into the main body of the air conditioner through a mouth and an upper suction opening to conduct heat through the front side heat exchanger and the rear side heat exchanger, and blows out from the outlet, The heat exchanger and rear heat exchanger should Each of the rows is provided with a refrigerant flow path, and during cooling operation, the refrigerant is introduced from the windward side of the front side heat exchanger, and the windward row is conducted and then guided to the rear side heat exchanger. Is characterized by.

As a fifth aspect of the present invention, the rear heat exchanger according to the fourth aspect is provided with a branch portion for branching the refrigerant introduced from the windward row of the front heat exchanger into a plurality of branch passages. It is characterized by

According to a sixth aspect of the present invention, in the front side heat exchanger according to the fifth aspect, an auxiliary introducing portion for introducing the refrigerant from a plurality of branch flow passages of the rear side heat exchanger into a portion closest to the blower again. It is characterized by having.

According to a seventh aspect of the present invention, the branch portion provided in the rear heat exchanger according to the fourth aspect diverts the refrigerant after guiding the refrigerant from the upwind row to the downwind row, and one of the branch flow paths has a rear surface. The leeward row of the side heat exchanger-the end portion-the leeward row-the middle part of the front side heat exchanger, the leeward row-the leeward row-the refrigerant is introduced in this order, and the other branch flow path is the rear side heat exchanger. It is characterized in that the refrigerant is introduced in the order of leeward row-intermediate part leeward row of the front side heat exchanger-end portion-leeward row-outside.

[0021]

In the first aspect of the invention, the rear side heat exchanger and the front side heat exchanger are directly connected and fixed by the jump pipe for conducting the refrigerant between the mutual heat exchangers, and the strength is increased.

In the second aspect of the present invention, during the heating operation, the refrigerant lead-out portion after the merging is located on the windward side of the front side heat exchanger where the wind speed of the heat exchange air is relatively high, and the undercooling during heating is large. It is possible to obtain the improvement of heat exchange efficiency. Furthermore, since the refrigerant flowing through the front and rear heat exchangers is made uniform, the heat exchange efficiency can be further improved.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an indoor unit of the air conditioner is configured. Unit body 1 which is the air conditioner body
0 is composed of a front panel 11 and a rear plate 12. A suction port 13a is provided on the front side and the upper side of the front panel 11,
13b is opened, and grills 14a and 14b are fitted into them.

Inside the unit body 10, each suction port 13
a and 13b, which are opposed to each other and are formed in an inverted V-shape, which will be described later, and an internal position of the inverted V-shaped heat exchanger 15, that is, the interior of the heat exchanger 15 so as to be covered by the heat exchanger. A cross-flow fan 16 that is a blower fan that constitutes a blower is arranged.

The heat exchanger 6 is attached to a heat exchanger mounting plate (not shown) of the rear plate 12, the front side lower part of the heat exchanger is integrally formed with the front drain pan 17a, and the rear side lower part is integrally formed with the rear plate 12. And is inserted into the rear drain pan 17b.

The front and rear drain pans 17a, 17b described above
Communicate with each other via a communication passage (not shown). Below the front drain pan 17a, a blow-out port 18 that opens to the lower portion on the front surface side of the unit main body 1 is formed.

The upper end of the rear plate 12 is the front panel 11
Is connected to the rear side end of the upper suction port 13b, and the lowermost end extends from the rear drain pan 17b through the side of the cross flow fan 16 to the blowout port 18. The front drain pan 17a also serves as a nose for the cross flow fan 16.

The lower end on the back side of the rear plate 12 is secured as a space for inserting the auxiliary connecting member 19 such as auxiliary pipes, drain hoses and lead wires. Next, the heat exchanger 15 will be described in detail.

As shown in FIG. 2, the heat exchanger 15 has a large number of heat radiating fins 20 ... Arranged in parallel with a narrow gap between each other and the heat radiating fins 20. And a plurality of heat exchange pipes 21 ... End plates (not shown) bent to have an L-shaped cross section are provided at both ends of the radiating fins 20 ...

The radiating fin 20 is preliminarily formed into a straight shape by press punching. At the upper part of this fin, a notch 22 is formed from one side edge to just before the other side edge.
A plurality of cutouts 2 are provided in a region below this from the other side edge to just before the one side edge at a predetermined interval.
3 ... are provided.

The heat radiating fins 20 and the end plates are respectively provided with mounting holes provided in two rows, and the heat exchanging pipes 21 are penetrated and expanded, and then the upper cut portion 22 is rotated clockwise from above. Is bent and urged in the direction, and the lower cutouts 23 are bent inward at predetermined angles in multiple stages to obtain a heat exchanger 15 having a shape as shown in the figure, that is, an inverted V shape.

As described above, the heat exchanger 15 includes the rear-side heat exchanger 15A, which is the uppermost portion that is bent and biased in the clockwise direction, and the front-side heat exchanger, which is the portion that is bent inward in multiple stages. It consists of 15B.

The heat exchange pipe 21 has a long straight portion U.
The U-turn portion 21a is folded back in a letter shape.
In the figure, the protrusions are projected from the heat radiation fins 20 on the far side (the leftmost end), and the open ends 21b of the straight portions are projected from the heat radiation fins 20 on the front (the rightmost end).

Both open ends 21b of the heat exchange pipe 21,
21b are connected by a U bend and a jump pipe, which will be described later, as shown in FIGS. 1 and 2 again. Here, for convenience of explanation, since the front side heat exchanger 15B is bent in five stages, reference numerals a to e are sequentially attached from the uppermost stage to the lowermost stage in the drawing. The row arranged on the side facing the front suction port 13a of the front side heat exchanger 15B corresponds to the side on which heat exchange air is introduced, that is, the windward side, and is therefore referred to as the upwind row U. The arrayed row corresponds to the heat exchange air outlet side, that is, the leeward side, and is referred to as the leeward row D.

Similarly, in the rear heat exchanger 15A,
The row that is arranged on the side facing the upper suction port 13b corresponds to the heat exchange air introduction side, that is, the windward side, so it is called the upwind row U, and the row that is arranged on the side facing the cross-flow fan 16 is the heat exchange air outlet. It corresponds to the side, that is, the leeward side, and is referred to as the leeward row D.

During the cooling operation, the refrigerant introducing portion 24 for introducing the refrigerant from the outside into the heat exchanger 15 has the front side heat exchanger 15B.
The refrigerant pipe Pa that is set in the upwind row U of the second stage portion b of and that extends from the outside is connected to the lower open end of the heat exchange pipe 21 at the same position.

The upper end of the heat exchange pipe 21 and the lower end of the heat exchange pipe in the windward row U of the uppermost stage a are connected by a U bend 25a. That is, the U bend 25a straddles the notch 23 that forms the boundary between the uppermost step a and the second step b along the upwind row U.

The upper open end of the heat exchange pipe 21 in the windward row U of the uppermost stage a and the upper open end of the heat exchange pipe 21 located in the upper windward row U of the rear heat exchanger 15A are the first jump pipes. It is communicated at 26. This first jump pipe 2
6 straddles the notch 22 between the front heat exchanger 15B and the rear heat exchanger 15A along the windward row U.

At the lower open end of the heat exchange pipe 21,
The base end portion 27a of the three-way bend 27 forming the branch portion is connected. One branch end 27b of the three-way bend 27 is
It is connected to the upper open end of the heat exchange pipe 21 in the leeward row D located in the middle of the rear surface side heat exchanger 15A. The lower open end of the heat exchange pipe 21 and the open end D of the lower end heat exchange pipe 21 are connected by a U bend 25b.

The open end of the windward row U of the heat exchange pipe 21 and the open end of the lower portion of the heat exchange pipe 21 located in the lower portion of the windward row U are connected by a U bend 25c. The upper opening end of the heat exchange pipe 21 and the lower opening end of the heat exchange pipe 21 in the windward row U of the third stage c of the front heat exchanger 15B are the second
It is connected by the jump pipe 28.

That is, this second jump pipe 28
Is installed over the rear surface side heat exchanger 15A and the front surface side heat exchanger 15B, and connects and supports these heat exchangers.
Further, the heat exchange pipes 21 in the windward row U of the third stage c of the front side heat exchanger 15B to which the second jump pipe 28 is connected.
The first auxiliary introduction portion 35a is formed at the lower opening end.

The upper opening end of the heat exchange pipe 21 and the lower opening end of the heat exchange pipe 21 in the leeward row D of the second stage b are U.
Bend 25d communicates. That is, U bend 25d
Crosses diagonally the notch 23 at the boundary between the second stage b windward row U and the third stage c windward row D of the front heat exchanger 15B.

The upper open end of the heat exchange pipe 21 and the lower open end of the heat exchange pipe 21 in the leeward row D of the uppermost stage a are U
It is communicated with the bend 25e. That is, U bend 25e
Is a notch 23 at the boundary between the uppermost step a and the second step b.
, Along the leeward row D.

An external refrigerant pipe Pb is connected to the upper open end of the heat exchange pipe 21. This connection portion serves as the first refrigerant outlet portion 29 during the cooling operation. In this way, each heat exchange pipe 21
, And guides the refrigerant through the U bends 25b to 25e and the second jump pipe 28, and the first auxiliary introduction section 3
First branch flow path 3 from 5a to the first refrigerant outlet 29
0 is configured.

The other branch end 27 of the three-way bend is also used.
c is connected to the lower open end of the heat exchange pipe 21 in the leeward row D of the rear heat exchanger 15A. The upper open end of the heat exchange pipe 21 and the fourth stage portion d of the front heat exchanger 15A.
A third jump pipe 31 communicates with the upper open end of the heat exchange pipe 21 in the windward row U.

That is, this third jump pipe 31
Is installed over the rear surface side heat exchanger 15A and the front surface side heat exchanger 15B, and connects and supports these heat exchangers.
Further, the heat exchange pipes 21 in the windward row U on the fourth stage d of the front side heat exchanger 15B to which the third jump pipe 31 is connected.
The second auxiliary introduction portion 35b is formed at the upper opening end.

From the setting of the connecting position of the third jump pipe 31 and the setting of the position of the second jump pipe 28, the jump pipes 28 and 31 are located between the rear heat exchangers 15A and 15B. Intersect at.

The lower opening end of the heat exchange pipe 21 and the upper opening end of the heat exchange pipe in the windward row U of the lowermost stage e are connected by a U bend 25f. That is, this U bend 25f
Straddles the notch 23, which is the boundary between the fourth step d and the bottom step e of the front heat exchanger 15A, along the upwind row U.

The lower opening end of the heat exchange pipe 21 and the lower opening end of the heat exchange pipe 21 in the leeward row D of the lowermost stage e are U.
It is connected with a bend of 25g. That is, U bend 25g
Straddles the leeward row U and the leeward row D at the bottom e.

The upper open end of the heat exchange pipe 21 and the lower open end of the heat exchange pipe 21 in the leeward row D of the fourth stage d are U
It is connected with a bend 25h. That is, U bend 25h
Is a notch 23 at the boundary between the fourth step d and the bottom step e.
, Along the leeward row D.

The upper opening end of the heat exchange pipe 21 and the lower opening end of the heat exchange pipe 21 in the leeward row D of the third stage c are U
Bend 25i is used for communication. That is, U bend 25i
Is a notch 23 at the boundary between the third step c and the fourth step d.
, Along the leeward row D.

An external refrigerant pipe Pc is connected to the upper open end of the heat exchange pipe 21. This connection portion serves as the second refrigerant outlet portion 32 during the cooling operation. In this way, each heat exchange pipe 21
And the U bends 25f to 25i and the third jump pipe 32 to guide the refrigerant, and the second auxiliary introduction portion 35
Second branch flow path 33 from b to the second refrigerant outlet 32
Is configured.

The external refrigerant pipe Pb connected to the first lead-out portion 29 and the external refrigerant pipe Pc connected to the second lead-out portion 32 meet at the joint tool 34, and one external pipe It will replace the refrigerant pipe P.

The heat exchanger 15 in which the refrigerant flow path is set in this way is provided and, for example, cooling operation is performed. The compressor of the outdoor unit (not shown) is driven to perform the refrigeration cycle operation, and the cross flow fan 16 of the indoor unit is driven. The high-temperature and high-pressure refrigerant discharged from the compressor is guided to the heat exchanger 15.

The heat exchange air is introduced from the suction ports 13a, 13b and guided to the heat exchanger 15, and the heat radiating fins 20 ...
The air is blown from the outlet 18 into the air-conditioned room after coming into contact with No. 1.

The refrigerant is introduced into the heat exchanger 15 from the outside, releases latent heat of vaporization while passing through the heat exchange pipes 21, and conducts cold heat to the radiation fins 20. These radiation fins 2
Heat exchange air is conducted between 0 ... to perform heat exchange. The heat-exchanged air absorbs heat, lowers in temperature, and is discharged from the heat exchanger 15,
The air is blown from the outlet 18 to the air-conditioned room via the cross flow fan 16 to perform a cooling operation.

The flow of the refrigerant in the heat exchanger 15 will be described in more detail. The refrigerant introduced from the outside to the refrigerant introducing portion 24 is first transferred from the second stage b of the front side heat exchanger 15B to the windward row U. It rises to the uppermost stage part a along the windward row U, and is further guided to the windward row U of the rear surface side heat exchanger 15A via the first jump pipe 26.

From here, it is guided to a three-way bend 27 which is a branch portion provided in the rear heat exchanger 15A, and is split into a first branch passage 30 and a second branch passage 33. In addition,
It is natural that the more even the wind speed of the heat exchange air in the set portion of the branch portion 27 is, the more evenly the refrigerant is divided. However, in the front side heat exchanger 15B, the wind speed is partially strong and weak along this longitudinal direction, and if branch points are set here, it is difficult to divide the refrigerant evenly.

On the other hand, in the rear heat exchanger 15A, only the flow of the heat exchange air from the upper suction port 13b is concerned, so that the wind velocity is substantially uniform along the longitudinal direction, and therefore, as in the above embodiment. If it is provided in the rear heat exchanger 15A, the refrigerant can be evenly split.

In the first branch flow path 30, the second branch
The refrigerant guided to the jump pipe 28 of No. 2 is guided to the first auxiliary introduction section 35a set in the windward row U of the third stage c of the front heat exchanger 15B, while in the second branch flow path 33. The refrigerant guided through the third jump pipe 31 is guided to the second auxiliary introducing portion 35b set in the windward row U of the fourth stage d of the same front heat exchanger 15B.

In both cases, the first and second refrigerant introducing portions 35a and 35b set in the front heat exchanger 15B via the jump pipes 28 and 31 are located closest to the cross flow fan 16.

It is natural that the position closest to the cross flow fan 16 has the highest wind speed, and the refrigerant introduced from the jump pipes 28 and 31 into the front heat exchanger 15B has the highest wind speed. Therefore, the heat exchange is sufficiently performed, and the heat exchange efficiency is improved.

Further, the first branch flow passage 30 and the second branch flow passage 33 for branching and guiding the refrigerant from the branch portion 27 are respectively introduced along the upwind row U and in the leeward row D. It is set so that the distance along which it is guided is almost equal.

That is, the first and second branch flow paths 30, 3
3, the windward row U and the leeward row D have almost the same ratio, and the heat exchange amounts in the respective branch flow paths are almost the same, which improves the heat exchange efficiency of the heat exchanger 15 as a whole. Can be connected.

When switching to the heating operation, the flow of the refrigerant is reversed. This time, the refrigerant is introduced from the external refrigerant pipe Pb, and the heat transfer pipes in the leeward row D of the uppermost stage a of the front heat exchanger 15B in which the refrigerant outlet 29 of the first branch flow path 30 is set during the cooling operation. On the other hand, the refrigerant is introduced from the external refrigerant pipe Pc while flowing in from 21, and the refrigerant derivation part 32 of the second branch flow path 33 is set during the cooling operation. Flows in from the heat exchange pipe 21.

Then, the respective branch flow passages 30 and 33 flow in the opposite direction to that in the cooling operation and join at the branch portion 27, and finally set in the second stage part b windward row D of the front side heat exchanger 15B. It is led out from the cooled refrigerant introduction part 24.

As described above, during the heating operation, since the refrigerant derivation position in the heat exchanger 15 is set to the windward side U of the front heat exchanger 15B having a relatively high wind speed, the refrigerant is discharged at this derivation position. It becomes a supercooled state.

More so-called undercool can be obtained, and the heat exchange efficiency during the heating operation can be improved. The first jump pipe 26 applies the most force to the front heat exchanger 15 regardless of whether the heating or cooling is performed.
The strength is maintained from the position where it is provided across the bent portion of B and the rear surface side heat exchanger 15A.

Since the second jump pipe 28 and the third jump pipe 31 are laid across the front side heat exchanger 15B and the rear side heat exchanger 15A, the heat exchangers are reliably connected to each other. In particular, the shape restoring force, which is the spread of the steps a to e in the front side heat exchanger 15B, is prevented, and the strength of the inverted V-shaped heat exchanger 15 is increased.

In particular, since the jump pipes 28 and 31 from the rear heat exchanger 15A are connected to the middle portion of the front heat exchanger 15B, the deformation due to the shape restoring force of the front heat exchanger can be further prevented. .

Since the second jump pipe 28 and the third jump pipe 31 are set so as to intersect between the front heat exchanger 15B and the rear heat exchanger 15A, they interact with each other. Disperses the direction of force to obtain a further strength increase.

In the front side heat exchanger 15B, each step a
U-bends 25a, 25d, 25e, 25f, 25 straddling the notches 23 forming the bent portions of
Since h and 25i are provided, the shape restoring force, which is the spread of the steps a to e, can be more reliably prevented.

In the front side heat exchanger 15B, the lowermost step e is attached and fixed to the unit main body 10 by an appropriate means, and the uppermost step a to the fourth step d are fixed to the unit main body 10. It is a free part that is not done.

However, the second and third jump pipes 28 and 31 are connected to the lowermost third portion c and the fourth portion d of the free part of the front side heat exchanger 15B. Therefore, the shape restoring force, which is the spread from the uppermost step a to the fourth step d, is more reliably prevented.

[0075]

As described above, according to the first aspect of the invention, the rear side heat exchanger and the front side heat exchanger forming the inverted V-shaped heat exchanger are directly connected to each other, and the refrigerant flow path is formed. Since the jump pipe constituting a part of the above is provided, the rear heat exchanger and the front heat exchanger are firmly connected and fixed to each other, and the strength can be increased. Therefore, it is possible to eliminate all the strength anxiety peculiar to the inverted V-shaped heat exchanger and to obtain the effect of improving the reliability.

According to the second aspect of the invention, the front side heat exchanger and the rear side heat exchanger are provided with the refrigerant passages on the windward and leeward rows.
During the cooling operation, the refrigerant is introduced from the windward side of the front side heat exchanger, and the windward row is conducted and then guided to the rear side heat exchanger, so that it is set to the heat exchanger during the heating operation. Since the refrigerant outlet portion is located at the portion where the wind speed of the heat exchange air is the highest, a large amount of undercool can be obtained. Moreover, since the refrigerants flowing through the front and rear heat exchangers are made uniform, the heat exchange efficiency can be further improved. Therefore,
The heat exchange efficiency is improved, a higher heating capacity is obtained, and the reliability is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an air conditioner indoor unit showing an embodiment of the present invention.

FIG. 2 is a perspective view of an inverted V-shaped heat exchanger of the same embodiment.

FIG. 3 is a perspective view of an inverted V-shaped heat exchanger showing a conventional example.

[Explanation of symbols]

10 ... Unit body, 15 ... Inverted V-shaped heat exchanger, 15B
... Front heat exchanger, 15A ... Rear heat exchanger, 28,3
1 ... Jump pipe, 23 ... Notch, 25a-25
i ... U bend, 13a ... front suction port, 13b ... upper suction port, 18 ... blowing port, U ... upwind row, D ... downwind row, 3
0 ... 1st branch flow path, 33 ... 2nd branch flow path, 27 ... Branch part (3 way joint), 35a ... 1st auxiliary introduction part,
35b ... Second auxiliary introduction section.

Claims (7)

[Claims] 1. An air conditioner main body, which is arranged in the air conditioner main body and has an upper portion bent into an acute angle to form an inverted V shape in a side view, and is located on the front side of the air conditioner main body. In the air conditioner comprising a front side heat exchanger and a rear side heat exchanger located on the rear side, the rear side heat exchanger and the front side heat exchanger are mutually An air conditioner comprising a jump pipe that constitutes a part of a refrigerant flow path that allows a refrigerant to flow between heat exchangers. 2. The air conditioner according to claim 1, wherein there are a plurality of the jump pipes, and midpoints of the jump pipes intersect each other. 3. The front side heat exchanger is provided with a plurality of cuts, is bent in multiple steps along the cuts, and straddles the bent cuts together with the jump pipe to form a refrigerant flow path. 2. The air conditioner according to claim 1, wherein a U bend that constitutes a part is connected, and one end of the jump pipe is connected to a lowermost end of a free portion (non-fixed portion) of the front heat exchanger. Machine. 4. An air conditioner body having a front suction port, an upper suction port, and an outlet port at a lower front portion, and an air conditioner body disposed in the air conditioner body, the upper part of which is bent into an acute angle to show a side view. A heat exchanger, which has an inverted V shape and is composed of a front side heat exchanger located on the front side of the air conditioner body and a rear side heat exchanger located on the rear side, and this heat exchanger. Between the front side heat exchanger and the rear side heat exchanger, heat exchange air is sucked into the main body of the air conditioner through the front suction port and the upper suction port, and the front side heat exchanger and the rear side heat exchanger are connected. In an air conditioner equipped with a blower that blows heat through a heat exchanger by conducting heat through the heat exchanger, the front heat exchanger and the rear heat exchanger are a windward row and a leeward row. Each is equipped with a refrigerant flow path, and the front side heat exchange described above is performed during cooling operation. An air conditioner characterized in that a refrigerant is introduced into the heat exchanger from the windward side of the exchanger, and this windward row is conducted and then guided to the rear heat exchanger. 5. The rear heat exchanger is provided with a branch portion for branching a refrigerant introduced from an upwind row of the front heat exchanger into a plurality of branch passages. Air conditioner described. 6. The front side heat exchanger is provided with an auxiliary introducing section for introducing the refrigerant from a plurality of branch flow paths of the rear side heat exchanger into a portion closest to the blower again. The air conditioner according to claim 5. 7. A branch portion provided in the rear side heat exchanger diverts the refrigerant after guiding the refrigerant from the windward row to the leeward row, and one branch flow passage has a leeward row of the rear surface heat exchanger. The refrigerant is introduced in the order of end portion-upwind row-intermediate portion of the front side heat exchanger, upwind row-downwind row-the outside, and the other branch flow path is the downwind row of the rear heat exchanger-front side heat exchanger. The air conditioner according to claim 4, wherein the refrigerant is introduced in the order of the middle windward row-end portion-leeward row-outside.