JPH10141709A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve more an operating efficiency of an air conditioner by a method wherein communicating pipes of a heat exchanger are positively applied for a heat exchanging action. SOLUTION: Each of communicating pipes 25 of a heat exchanger 4 is formed into a long U-shaped pipe. The pipe is fixed under a state in which it is extended from a pipe plate 21 toward an outside part in a row direction of fins in respect to an end part 24a of a heat transfer pipe 24. The communicating pipes 25 are extended out at a machine chamber 12 where a compressor 6 is installed, so that each of the communicating pipes 25 is operated as a part of the heat exchanger at the machine chamber 12 and an efficient heat exchanging action is carried out between refrigerant circulating in the pipe and high temperature air in the chamber 12. As a result, a heat exchanging capability is entirely improved correspondingly and an operating efficiency is improved. In addition, in the case that the device is used as an evaporator and a small amount of circulating refrigerant is applied, it is sometimes possible that a required heating calorie for evaporation of refrigerant is accommodated by a heat absorbing calorie at the communicating pipes. In this case, it is possible that the fan is stopped and a consumption power is reduced, resulting in that its efficiency can be improved more. In concurrent with this operation, a temperature within the machine chamber is also reduced, an increasing in temperature of various kinds of electrical components is restricted and its reliability in operation is improved.

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 an outdoor unit in a separate type air conditioner.

[0002]

Of the Related Art FIG outdoor unit Z ₀ of a conventional separate type air conditioner and a heat exchanger 40 of the cross fin type, which is applied to the outdoor unit Z ₀ in FIG. 6, respectively ing.

The heat exchanger 40 has, as shown in FIGS. 5 and 6, plate-like fins 22, 22,... A plurality of heat transfer tubes 24, 24,... Formed in a long U-shaped tube extending over the fin row are arranged at one end of the fin row from the tube sheet 20 at the other end. The fins 22, 22,.
.. arranged so as to penetrate in the thickness direction thereof, and its open end 2
4a and 24a are opened on the tube sheet 21;
One of the pair of open ends 24a, 24a of one adjacent heat transfer tube 24 among the open ends 24a, 24a,... Of the heat transfer tubes 24, 24,. Pair of open ends 24a, 2 in the heat transfer tube 24 of FIG.
The refrigerant circulation path is formed by sequentially connecting one of the connection pipes 4a to one of the connection pipes 25 by an arcuate tubular communication pipe 25. Therefore, the bent portions 24b of the heat transfer tubes 24, 24,... Are exposed on the tube sheet 20 located at one end in the width direction of the heat exchanger 40, and are located at the other end. The connecting pipes 25, 25,... The heat exchanger 40 configured as described above is similar to that of FIG.
As shown in, incorporated in the outdoor unit Z ₀ of the described next.

[0004] The outdoor unit Z ₀ is constructed by incorporating the heat exchanger 40, the fan 5 and the compressor 6 in a casing 1.

[0005] The casing 1 has a rectangular box shape in which an inlet 2 and an outlet 3 are formed on opposing side surfaces, respectively, and its internal space is located on one side by a partition wall 10. Further, it is divided into two chambers: a heat exchange chamber 11 corresponding to the suction port 2 and the air outlet 3, and a machine chamber 12 located on the other side and substantially closed.

[0006] In the heat exchange chamber 11, the heat exchanger 40 is arranged to face the inlet 2, and the fan 5 is arranged to face the outlet 3. In the machine room 12, the compressor 6 is arranged. In this case, the heat exchanger 40 has one end on the tube sheet 21 side supported by the partition wall 10, so that each of the communication tubes 25, 25,... Protrudes into the machine room 12.

[0007]

By the way, since the compressor 6 is disposed, the room temperature of the machine room 12 is considerably higher than the outside air temperature due to heat radiation from the compressor 6 (for example, About 10 to 15 ° C). Therefore, it is conceivable to increase the energy efficiency of the outdoor unit Z ₀ by effectively utilizing the exhaust heat of the machine chamber 12 by radiation from the compressor 6.

However, in the conventional outdoor unit Z ₀ ,
Each of the connecting pipes 25, 25,.
Since it is formed in the shape of an arcuate tube from the viewpoint that it is sufficient to have a function of connecting the pipe ends of 4,..., One end of the heat exchanger 40 is supported by the partition wall 10 as described above. The connecting pipes 25, 25,.
, Each of the connecting pipes 25, 25,.
- it does not contribute little to the recovery of exhaust heat of the machine room 12, therefore, increased energy savings of the outdoor unit Z ₀ by effective use of exhaust heat of the machine room 12 was no so desire.

In view of the above, an object of the present invention is to further improve the operation efficiency of an air conditioner by positively participating a heat exchanger in a heat exchanger.

[0010]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

In the first invention of the present application, the interior of the casing is divided into a heat exchange chamber located on one side and a machine chamber located on the other side by a partition wall, and the heat exchange chamber has a thickness direction. A large number of fins are arranged opposite to each other at a predetermined interval, and the ends of the fins are connected to each other at a tube plate portion located at one end side of the fin row by penetrating the fins in a thickness direction thereof, and the ends thereof are connected by a communication pipe. Heat exchanger provided with a plurality of heat transfer tubes, and a fan for blowing air to the heat exchanger, while the machine room is provided with a compressor. Each of the communication tubes of the vessel is formed in a U-shaped tubular shape having a foot length and attached to an end of the heat transfer tube in a state of extending outward from the tube plate in the fin row direction,
The heat exchanger is arranged in the casing in a state where each of the communication pipes protrudes toward the machine room through the partition wall.

According to a second invention of the present application, in the air conditioner according to the first invention, a plurality of fins are attached to each of the connecting pipes at predetermined intervals.

In the third invention of the present application, the first or the second
The air conditioner according to the present invention is characterized in that an opening for communicating the heat exchange chamber and the machine room is provided near the arrangement position of each communication pipe on the partition wall.

According to a fourth aspect of the present invention, in the air conditioner according to the third aspect, air in the machine room is supplied to a portion of the air conditioner in the machine room and near the communication port. It is characterized in that a deflecting member is provided for guiding the port side through the vicinity.

[0015]

According to the present invention, the following effects can be obtained by adopting such a configuration.

According to the air conditioner according to the first invention of the present application, each connecting pipe of the heat exchanger is formed in a U-shaped tube having a foot length, and the end of the heat transfer pipe is arranged in a fin row direction from the tube sheet to the end. Since each of the connecting pipes of the heat exchanger is protruded toward the machine room where the compressor is arranged, the respective connecting pipes protruding toward the machine room are attached while being attached in a state of extending outward. Functions as a part of the heat exchanger, and the heat exchange action is efficiently performed between the refrigerant circulating in the heat exchanger and the high-temperature air in the machine room.

Therefore, the heat exchange capacity of the heat exchanger as a whole is improved by the heat exchange action in each of the communication pipes, for example, as compared with the air conditioner of the conventional structure in which each communication pipe hardly exhibits a heat exchange function. Thus, the operation efficiency of the air conditioner is improved.

When the air conditioner is used as an evaporator and the amount of circulating refrigerant is small, the amount of heat absorbed by each of the connecting pipes may be sufficient to cover the required amount of heat accompanying the evaporation of the refrigerant. In such a case, by stopping the operation of the fan that blows air to the heat exchanger and reducing the power consumption of the fan, the operating efficiency of the air conditioner can be further improved.

Further, since the exhaust heat in the machine room is absorbed by the connecting pipes of the heat exchanger protruding toward the machine room, the room temperature of the machine room is reduced. As a result, the temperature rise of various electric components arranged in the machine room is suppressed, and the operational reliability is enhanced.

According to the air conditioner of the second aspect of the present invention, since a plurality of fins are attached to each of the connecting pipes at a predetermined interval, the heat transfer action of each of the fins causes each of the connecting pipe sections. The heat exchange capacity of the air conditioner is further improved, and the operation efficiency of the air conditioner can be further improved.

According to the air conditioner of the third aspect of the present invention, when the fan is in operation, a negative pressure is generated between the fan and the heat exchanger in the heat exchange chamber. By providing a communication port between the heat exchange chamber and the machine chamber in the vicinity of the arrangement position of each of the communication pipes on the partition wall, each of the communication pipe portions is provided in the machine chamber by the suction effect due to the negative pressure. Then, a flow of air is generated from the communication port toward the heat exchange chamber through the communication port, and the heat exchange action in each communication pipe is further promoted. As a result, the heat exchange capacity of each of the connecting pipe portions is further improved, and the operating efficiency of the air conditioner can be further improved.

According to the air conditioner pertaining to the fourth invention of the present application, the air in the machine room is passed through the vicinity of each of the communication pipes to the portion located in the machine room and near the communication port. Since the deflecting member is provided on the side, the air flow can be more reliably directed to each of the communication pipes, so that the heat exchange action in each of the communication pipes is further promoted. The operation efficiency can be further improved.

[0023]

The outdoor unit Z ₁ [OF THE PREFERRED EMBODIMENTS OF THE INVENTION First Embodiment Figure 1 separate type air conditioner according to a first embodiment of the present invention, also the outdoor unit Z ₁ in FIG. 2
2 shows the heat exchanger 4 applied to the first embodiment. This outdoor unit Z ₁
Since the heat exchanger 4 has the same basic configuration as the above-described conventional outdoor unit Z ₀ and the heat exchanger 40 applied to the same, the configuration specific to this embodiment will be described here. The description will be made mainly, and the description in the section of “Prior Art” will be cited for the parts having the same configuration as the conventional one.

First, as for the heat exchanger 4, as shown in FIG. 2, the heat exchanger 4 includes a connecting pipe 25 (see FIG. 6) which is conventionally formed in an arc tube, and an arc tube section. 25a and a pair of straight pipe portions 25b, 25b extending linearly from both ends of the arc-shaped tube portion 25a to form a U-shaped tube having a foot length, and the connecting tubes 25, 25,. On the tube sheet 21 side, a point that a refrigerant circulation path is formed by connecting to the open ends 24a, 24a of the heat transfer tubes 24, 24,... And these connecting tubes 25, 25,. 2
The point of extension from 1 to the outside in the fin row direction is the most characteristic.

On the other hand, as shown in FIG. 1, the outdoor unit Z ₁ connects the heat exchanger 4 to the heat exchange chamber 11 of the casing 1.
When the heat exchanger 4 is disposed in the inside, the end of the heat exchanger 4 on the tube sheet 21 side is supported by the partition wall 10 and
Each of the connecting pipes 25, 25,... Provided on the upper part 1 protrudes toward the machine room 12 side. Therefore, the projecting amount of the connecting pipe 25 toward the machine room 12 is much larger than that of the conventional structure in which the connecting pipe 25 has an arcuate tubular shape.

Further, in the outdoor unit Z ₁ of this embodiment employs a distinctive structure which is different from the conventional.
First, the first characteristic configuration is that the partition wall 10 is located at a position near the fixing portion of the heat exchanger 4 in the height direction of the heat exchanger 4 (vertical direction with respect to the paper surface of FIG. 1). The point is that a slit-shaped passage 14 is formed.

The second characteristic feature is that the partition wall 10 is formed along the edge of the opening 14 on the side opposite to the heat exchanger and at the opening 1
4 is that a deflecting member 15 extending over the entire length is attached. When the air in the machine chamber 12 moves to the heat exchange chamber 11 through the communication port 14, the deflecting member 15 transfers the air flow to the communication pipes 25, 25,. In order to be able to deflect, the tip part 15a is inclinedly arranged in a state where it faces the intermediate position between the arc tube part 25a of the connecting pipe 25 and the compressor 6.

According to the outdoor unit Z ₁ having such a configuration, the heat exchange capacity of the heat exchanger 4 is increased by effectively utilizing the exhaust heat of the compressor 6 in the machine room 12, thereby increasing the outdoor unit Z 1.
_It is possible to improve the operation efficiency of ( ₁ ).

That is, when the outdoor unit Z ₁ is operated, the indoor temperature of the machine room 12 rises due to heat radiation from the compressor 6. On the other hand, by the operation of the fan 5, the area between the heat exchanger 4 and the fan 5 in the heat exchange chamber 11 has a negative pressure. Accordingly, due to the pressure difference between the heat exchange chamber 11 and the machine chamber 12, the air in the machine chamber 12 passes through the communication port 14 while being guided by the deflecting member 15, as indicated by the streamline A in FIG. To the heat exchange chamber 11 side.
This air flow actively passes in the vicinity of each of the connecting pipes 25, 25,.
Is large, the heat exchange is performed between the refrigerant circulating in the communication pipes and the airflow flowing in the outside in each of the connecting pipes 25 (25,...). That is, each of the connecting pipes 25, 25,... Effectively functions as a part of the heat exchanger 4.)

As a result, the connection pipes 25, 25,.
Amount corresponding to the heat exchanging ability of the entire heat exchanger 4 of the heat exchange action is improved in, for example, compared to an air conditioner Z ₀ of each connecting pipe 25, 25, ... it is hardly exhibit heat exchange function conventional structure Te, so that the operating efficiency of the outdoor unit Z ₁ is enhanced.

Further, in heating operation to use the outdoor unit Z ₁ as an evaporator, and at the time of low load operation less the amount of circulating refrigerant, the respective connecting pipe 25, the evaporation of the refrigerant by the heat absorption amount at .. requires some cases heat may be covered, and in such a case by reducing the power consumption of the fan by stopping the operation of the fan 5, further improved the operation efficiency of the air conditioner Z ₁ with You can do it.

Further, the exhaust heat in the machine room 12 is absorbed by the connecting pipes 25, 25,... Of the heat exchanger 4 protrudingly arranged on the machine room 12 side.
The room temperature of 2 will fall. As a result, the rise in temperature of various electrical components arranged in the machine room 12 is suppressed, and the operational reliability of these electrical components is enhanced.

[0033] Such a separate type air conditioner outdoor unit Z ₂ of the second embodiment of the second embodiment Figure 3 the present invention, also in FIG. 4 the outdoor unit Z ₂
2 shows the heat exchanger 4 applied to the first embodiment. This outdoor unit Z ₂
And the heat exchanger 4, there is simmer outdoor unit Z ₁ and the heat exchanger 4 which is applied thereto in the first embodiment and its basic structure the same, those embodiments of the first and The difference is that plate-like fins 23, 23,... Are attached to the connecting tubes 25, 25,.

As described above, the connection pipes 25, 25,.
When the fins 23, 23,... Are attached to the connecting pipes 25, 25,.
Is further promoted, and the heat exchanger 4
Has a higher heat exchange capacity. Thus, in the outdoor unit Z _2, in which it is possible to obtain a higher operation efficiency than in the case of the outdoor unit Z ₁ of the first embodiment.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an outdoor unit according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of a heat exchanger applied to the outdoor unit of FIG.

FIG. 3 is a cross-sectional view of an outdoor unit according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a main part of a heat exchanger applied to the outdoor unit of FIG.

FIG. 5 is a cross-sectional view of a conventional outdoor unit.

FIG. 6 is a perspective view of a main part of the heat exchanger applied to FIG. 5;

[Explanation of symbols]

1 is a casing, 2 is an inlet, 3 is an outlet, 4 is a heat exchanger, 5 is a fan, 6 is a compressor, 10 is a partition wall, 11 is a heat exchange room, 12 is a machine room, 14 is a through hole, 15 is a deflection member,
20 and 21 are tube sheets, 22 is a fin, 23 is a fin, 2
4 heat transfer tubes, 25 is communication pipe, Z ₁ and Z ₂ is the outdoor unit.

Claims (4)

[Claims] 1. An interior of a casing is partitioned by a partition wall into a heat exchange chamber located on one side thereof and a machine room located on the other side thereof, and the casing is opposed to the heat exchange chamber at a predetermined interval in a plate thickness direction. Fins and a plurality of transmission fins arranged through the fins in the thickness direction thereof and connected at their ends by connecting pipes in a tube sheet portion located at one end of the fin row. An air conditioner comprising a heat exchanger having a heat pipe and a fan for blowing air to the heat exchanger, while a compressor is arranged in the machine room, wherein each of the heat exchangers A connecting pipe is formed in a U-shaped tubular shape having a foot length, and is attached to an end of the heat transfer pipe so as to extend outward from the tube sheet in the fin row direction. With the pipe protruding toward the machine room through the partition wall, An air conditioner characterized in that it is arranged in a single. 2. The air conditioner according to claim 1, wherein a plurality of fins are attached to each of the connecting pipes at predetermined intervals. 3. The method according to claim 1, wherein the partition wall is provided near a position where the communication pipes are arranged.
An air conditioner, characterized by being provided with an opening for communicating the heat exchange chamber and the machine room. 4. The device according to claim 3, wherein a portion located in the machine room and near the opening is
An air conditioner, comprising: a deflecting member that guides air in the machine room through the vicinity of each of the communication pipes to the port side.