JPH08159502A - Indoor machine for air conditioner - Google Patents

Abstract

PURPOSE: To improve an amount of heat exchange of an entire indoor heat exchanger by balancing amounts of heat exchange above and below the indoor heat exchanger well. CONSTITUTION: This indoor heat exchanger comprises an upper heat exchanger 6a having a front face inclined forwardly of an air passage, a rear heat exchanger 6b provided contiguous to and above the upper heat exchanger 6a and inclined rearwardly of the air passage, and a lower heat exchanger 6c provided contiguous to and below the upper heat exchanger 6a to be made substantially upright. After a refrigerant flowing into the upper heat exchanger 6a is caused by a branch pipe 9 to branch upward and downward, the upper refrigerant is made to pass toward the lower heat exchanger 6c and the lower refrigerant is made to pass toward the rear heat exchanger 6b. Accordingly, the respective refrigerants are directed toward an outlet on the leeward side to vertically balance the amounts of heat exchange well and improve the heat exchange performance of the indoor heat exchanger.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art On the indoor unit side of an air conditioner, an indoor heat exchanger 6 and an indoor blower (cross flow fan) 7 as shown in FIG. Three
Is arranged in the air passage 4 connecting the two. Indoor heat exchanger 6
Is an upper heat exchanger 6a whose front surface is inclined forward of the air passage 4, and a rear heat exchanger 6b which is connected to the upper portion of the upper heat exchanger 6a and is inclined rearward of the air passage 4, Some of them are composed of a lower heat exchanger 6c which is continuously provided in a lower portion of the upper heat exchanger 6a so as to stand substantially vertically. The wind speed passing through the indoor heat exchanger 6 varies depending on the positions A, B, C, and D as shown in FIGS. 3 and 4, and the variation in the wind speed affects the heat exchange of each part, so that the total heat exchange amount is reduced. Will be lowered. Therefore, in the conventional indoor heat exchanger 6, the inlet of the refrigerant (during cooling operation) is defined as the upper windward side of the upper heat exchanger 6a, and the branch pipe 9 is provided there to divide the inflowing refrigerant up and down to the upper side. The headed refrigerant passed through the rear heat exchanger 6b and then headed to the outlet located at the bottom of the upper heat exchanger 6a, while the refrigerant flowed down from the branch pipe 9 passed through the lower heat exchanger 6c. After that, it was designed to be directed to the outlet located above the lower heat exchanger 6c. Further, a wind shield plate 12 is provided in front of the upper part of the upper heat exchanger 6a to reduce the amount of air (air amount) passing through the upper part, or the lower heat exchanger 6c.
It was devised to balance the upper and lower heat exchange amounts by using a grooved tube for the refrigerant tube (hairpin tube).

[0003]

However, although the above-described method of using the wind shield 12 can improve the balance of the upper and lower heat exchange amounts to some extent, the heat exchange at the upper portion is suppressed, so that the indoor There is a problem that the heat exchange amount of the entire heat exchanger is not increased. Therefore, it is an object of the present invention to provide an indoor unit of an air conditioner in which the performance of the indoor heat exchanger is further improved.

[0004]

The present invention has been made to solve the above problems, and an air filter is provided in an air passage connecting an intake port at the upper part of a housing and an outlet port at the lower part of the same housing. An upper heat exchanger whose front surface is inclined forward of the air passage, and a rear heat exchanger which is connected to the upper portion of the upper heat exchanger and is inclined rearward of the air passage, and the upper heat exchanger. An indoor heat exchanger consisting of a lower heat exchanger which is connected to the lower part of the air conditioner and which stands upright almost vertically, and a blower for sending the air heat-exchanged by the indoor heat exchanger to the air outlet are provided. In the one provided with an airflow direction adjusting plate for adjusting the airflow direction into the room at the air outlet, after the refrigerant flowing into the refrigerant pipe in front of the upper heat exchanger is circulated in two directions by the branch pipe, Refrigerant in the lower direction and refrigerant in the lower direction change to the upper direction The refrigerant that has gone to the upper part goes through the rear heat exchanger once, and then goes to the outlet provided at the lower rear part of the upper heat exchanger, and the refrigerant that goes to the lower part by the direction change is the lower heat. After one round of the heat exchanger, the heat exchanger was directed toward the outlet provided at the upper rear part of the lower heat exchanger.

[0005]

With the above structure, after the refrigerant flowing into the upper heat exchanger is divided into the upper portion having a large heat exchange amount and the lower portion having a small heat exchange amount, the upper refrigerant is in the lower portion and the lower refrigerant is in the upper portion. The direction of the refrigerant is changed to the upper part, and the refrigerant that goes to the upper part goes through the rear heat exchanger and then goes to the outlet of the upper heat exchanger. Since it is designed to be changed, it is possible to improve the balance between the upper and lower heat exchange amounts of the indoor heat exchanger, and it is possible to improve the overall heat exchange amount of the indoor heat exchanger.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the internal configuration of the indoor unit, and FIG. 2 shows the pipe connection state of the indoor heat exchanger. In the figure, 1 is a housing (indoor unit main body), 2 is a suction port for indoor air,
Reference numeral 3 is an air outlet directed toward the room. A detachable air filter 5, an indoor heat exchanger 6, and an indoor blower (cross flow fan) 7 are installed in an air passage 4 connecting the suction port 2 and the air outlet 3.
Is provided, and the air outlet 3 is provided with an airflow direction adjusting plate 8 for vertically adjusting the airflow direction into the room. The indoor heat exchanger 6 has an upper heat exchanger 6 whose front surface is inclined forward of the air passage 4.
a, a rear heat exchanger 6b that is connected to the upper part of the upper heat exchanger 6a and is inclined rearward of the air passage 4, and a lower part of the upper heat exchanger 6a that is substantially vertical to the upper part. The lower heat exchanger 6c is installed.

By the way, the wind velocity distribution of the air passing through each part of the indoor heat exchanger 6 is as shown in FIG. 3. Assuming that this wind velocity distribution is proportional to the distribution of the heat exchange amount, the indoor heat exchanger 6 The amount of heat exchange between the upper part and the lower part is A + B
> C + D, clearly unbalanced. Therefore, in the present embodiment, a branch pipe 9 for vertically dividing the inflowing refrigerant is provided on the inlet side of the refrigerant located on the windward side of the upper heat exchanger 6a, and the vertically distributed refrigerants are reversed in the middle. Refrigerant pipes 10 and 11 for circulating in the direction are provided, and the refrigerant that has gone upward through the refrigerant pipe 11 goes through the rear heat exchanger 6b and then goes to the outlet located at the bottom of the upper heat exchanger 6a. On the other hand, the refrigerant that has flowed down through the refrigerant pipe 10 goes through the lower heat exchanger 6c once, and then the lower heat exchanger 6c.
Near the outlet located in the upper part of c, the refrigerant from the upper part described above is merged and returned to the compressor via a four-way valve (not shown).

With such a structure, the refrigerant branched from the branch pipe 9 to the upper part is heat-exchanged at the upper part of the upper heat exchanger 6a having a large heat exchange amount, and then transferred to the lower heat exchanger 6c having a small heat exchange amount. The refrigerant that can be circulated and that has branched to the lower portion from the branch pipe 9 has a small heat exchange amount, and thus the upper heat exchanger 6a.
After the heat is exchanged at the middle part of the indoor heat exchanger 6, the rear heat exchanger 6b having a slightly larger heat exchange amount than this position can be circulated and directed to the lower outlet side of the upper heat exchanger 6a. From the overall perspective, it is possible to balance the amount of heat exchange between the upper and lower sides. If a grooved tube is used for the lower heat exchanger 6c, the heat exchange amount of the lower heat exchanger 6c can be further improved.

[0009]

With the indoor unit having the indoor heat exchanger as described above, the heat exchange of the entire indoor heat exchanger is improved, and the capacity and comfort of the indoor unit are improved.

[Brief description of drawings]

FIG. 1 is an internal configuration diagram of an indoor unit according to the present invention and a conventional example.

FIG. 2 is a side view of the indoor heat exchanger showing the embodiment of the present invention.

FIG. 3 is a wind velocity distribution diagram for indoor heat exchangers according to the present invention and a conventional example.

FIG. 4 is a side view of an indoor heat exchanger showing a conventional example.

[Explanation of symbols]

 1 Case (Indoor Unit Main Body) 2 Suction Port 3 Outlet 4 Air Passage 5 Air Filter 6 Indoor Heat Exchanger 7 Indoor Blower (Cross Flow Fan) 8 Wind Direction Adjustment Plate 9 Branch Pipe 10 Refrigerant Pipe 11 Refrigerant Pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F28F 9/00 331

Claims (2)

[Claims] 1. An air passage connecting an inlet of an upper part of the housing and an outlet of a lower part of the housing, an air filter, an upper heat exchanger whose front surface is inclined forward of the air passage, and an upper part of the same. A rear heat exchanger that is connected to the upper part of the heat exchanger and is inclined rearward of the air passage, and is connected to the lower part of the upper heat exchanger,
An indoor heat exchanger consisting of a lower heat exchanger that stands substantially vertically, and a blower that sends out the air that has undergone heat exchange by the indoor heat exchanger to the air outlet, and the air outlet to the indoor In the one provided with a wind direction adjusting plate for adjusting the wind direction, after the refrigerant flowing into the refrigerant pipe in the front of the upper heat exchanger is circulated in two directions by the branch pipes, the upper refrigerant is moved to the lower part, Refrigerant is respectively turned to the upper part, and the refrigerant directed to the upper part is made to go through the rear heat exchanger, and then to the outlet provided at the lower rear part of the upper heat exchanger, and to the lower part by the direction change. The indoor unit of the air conditioner, characterized in that the directed refrigerant is made to go around the lower heat exchanger and then to the outlet provided at the upper rear part of the lower heat exchanger. 2. The indoor unit for an air conditioner according to claim 1, wherein a grooved pipe is used for the refrigerant pipe of the lower heat exchanger.