JPH0612421Y2 - Air conditioner - Google Patents

Description

[Detailed description of the device] [Industrial applications]

According to this invention, an air conditioner main body has an upper fan, a lower fan, and a switching damper that branches an air passage into two.
The present invention relates to an air conditioner that independently blows out heat-exchanged air from different outlets through two ventilation paths.

[Prior art]

FIG. 6 is a vertical side view of a conventional air conditioner disclosed in, for example, Japanese Patent Laid-Open No. 55-131640. In FIG. 6, reference numeral 1 denotes an air conditioner main body having a front surface provided with a suction port 2 and outlets 3a, 3b located above and below the suction port 2.
Are heat exchangers 5a and 5b, which are arranged in the front part of the main body 1 and serve as an evaporator of a refrigeration cycle during cooling.
Upper and lower fans consisting of cross flow fans arranged above and below, 6 is an air guide for the upper and lower fans 5a and 5b, and 7 is formed in the main body 1 from the suction port 2 to the heat exchanger 4
Ventilation path leading to the air outlets 3a, 3b via 8 and 8 independent of the air passage 7 above and below the air outlets 3a, 3b at approximately the center.
It is a switching damper that branches into two lower passages 7a and 7b, and a rear side portion is pivotally attached to the main body 1. Further, 9 is a water pan disposed below the heat exchanger 4, 10a and 10b are stabilizers for the fans 5a and 5b, 11a and 11b are wind direction changing devices attached to the air outlets 3a and 3b, and 12 is an air filter. Is. Then, the upper and lower fans 5a and 5b are independently rotated and stopped by two electric motors (not shown).
The damper 8 is driven by an appropriate means such as a solenoid or a link mechanism in the arrow (A) direction. Further, the heat exchanger 4 constitutes a part of the refrigeration circuit shown in FIG. 7, and the refrigerant pipes 14 penetrating a large number of fins 13 of the heat exchanger 4 have upper refrigerant pipes 14a and lower refrigerant pipes which are independent of each other. 14b. In addition, in FIG.
Reference numeral 15 is a compressor, 16 is an outdoor heat exchanger that serves as a condenser during cooling, 17a and 17b are pressure reducing devices, 18 is a refrigerant pipe, and 1 is a refrigerant pipe.
Reference numeral 9 is an electromagnetic on-off valve provided between the branch portion (B) and the inlet (C) of the lower refrigerant pipe 14b of the heat exchanger 4. Next, the operation of this air conditioner will be described. First,
When the power switch (not shown) is turned on, the upper and lower fans 5a and 5b in FIG.
Is in the position shown by the solid line, and therefore the ventilation passage 7 is branched into upper and lower ventilation passages 7a and 7b. Therefore, the air sent from the suction port 2 through the heat exchanger 4 passes through the two ventilation passages 7a and 7b, and enters the room from the upper and lower outlets 3a and 3b as shown by arrows (I) and (J). The air is blown out, and the ventilation passage has two operations. At the same time, as shown in FIG. 7, the compressor 15 is operating in two poles and the electromagnetic on-off valve 19 is open, so that the refrigerant is the upper refrigerant pipe 14a of the heat exchanger 4 as shown by the arrow (K).
And the lower refrigerant pipe 14b. For this reason,
The air flowing as indicated by arrows (I) and (J) is cold air. When the above state continues for a certain time, as shown in FIG. 8, cold air mass 21 is formed in the lower part of the room 20, and only the lower part is too cold. When the overcooled state is detected by an appropriate detection mechanism, the switching damper 8 operates at the position indicated by the chain line in FIG. 6, and the upper fan 5a
Is stopped, the upper outlet 3a serves as a suction port to form one ventilation passage, and air is blown out only from the lower outlet 3b as indicated by arrows M, Q, and R, and one ventilation passage is operated. Becomes At this time, the compressor 1 is included in the refrigeration cycle shown in FIG.
Since 5 is stopped, the refrigerant does not flow, the switching damper 8 has moved to the position indicated by the chain line, and the upper outlet port 3a changes to the intake port, so that the ventilation resistance of the ventilation path of the lower fan 5b becomes small. A large amount of air having a temperature substantially equal to the temperature of the upper part or the middle part of the room 20 shown in FIG. 8 is blown on the cold air mass 21 in a concentrated manner, and the cold air mass 21 is eliminated in a short time as shown in FIG. Can do comfortable air conditioning. Further, in the case of the operation with two ventilation paths, the electromagnetic on-off valve 19 is closed, the refrigerant is allowed to flow only in the upper refrigerant pipe 14a, and the cool air is blown from the upper outlet 3a as shown by the arrow (I), and the lower outlet is supplied. It is also possible to perform an operation of blowing out air at a temperature equal to room temperature from 3b as shown by an arrow (J).

[Problems to be solved by the device]

The conventional air conditioner is configured as described above, and in the case of two ventilation passages, between the switching damper 8 and the heat exchanger 4 that branch into the upper ventilation passage 7a and the lower ventilation passage 7b, There is a gap through which air can flow, and in this type of air conditioner, the upper fan 5a and the lower fan 5b may have different rotational speeds. In this case, a pressure difference is generated between the upper ventilation passage 7a and the lower ventilation passage 7b, the switching damper 8 and the heat exchanger 4 and the heat exchanger 4 are in a bypass state, and the upper and lower ventilation passages are in a bypass state. The pressure difference in the paths 7a and 7b becomes unstable. Therefore, there is a problem that the suction forces from the upper and lower fans 5a and 5b interfere with each other to cause surging, generate an abnormal sound, or cause reverse suction. This invention solves the above-mentioned problems that occur when the ventilation passage has two operations, and the suction forces of these fans do not interfere with each other even when the rotational speeds of the upper and lower fans differ. The purpose is to obtain an air conditioner that has a stable pressure difference in the upper and lower ventilation passages and is capable of efficient and stable operation.

[Means for Solving the Problems]

According to the invention, in the air conditioner as described above, a substantially central portion of the heat exchanger in the vertical direction is vertically branched by a partition plate inserted into the heat exchanger and intersects with the partition plate of the fin of the heat exchanger. Switching to form cut-off portions near the parts, bring these cut-down portions into contact with the partition plate surface, and divide the ventilation passage into two upper and lower parts at the rear side edge portion protruding from the rear surface of the heat exchanger of the partition plate. The front side edge of the damper is abutted via a seal member.

[Action]

In the air conditioner according to the present invention, when the switching damper divides the ventilation path to perform two operations, the partition plate and the switching damper come into contact with each other via the seal member, so that
The lower ventilation passage can be reliably branched without a gap, there is no air flow between the rear surface of the heat exchanger and the front edge of the switching damper, and the heat exchanger is also branched up and down by the partition plate. In addition, since the cut-down part formed in the fin of the heat exchanger is in contact with the partition plate surface, there is no gap between the fin and the partition plate, and the upper and lower ventilation passages from inside the heat exchanger can be reliably secured. Branched. Therefore, even when the rotation speeds of the upper and lower fans are different, the suction forces do not interfere with each other.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a vertical sectional side view of an air conditioner according to an embodiment, FIG.
The figure is an enlarged view of the II portion of FIG. 1, and FIG. 3 is the III-III of FIG.
FIG. 4 is a partial sectional view taken along the line, and FIG. 4 is a plan view showing the partition plate of FIG. 1 to 4, reference numerals 1 to 14 represent the same or corresponding portions as those of the conventional air conditioner shown in FIG. 6, and 22 is inserted in the heat exchanger 4 while avoiding the refrigerant pipe 14. A partition plate whose both ends are fixed to the air conditioner body 1 or the side plates of the heat exchanger 4, and 23 is a maltoplane bonded to the rear side edge portion 22a of the partition plate 22 protruding from the rear surface of the heat exchanger 4. It is a seal member made of a cushion material such as. Then, a cut 13b is provided in a portion rearward of the fin 13 of the heat exchanger 4 closer to the front edge thereof.
A partition plate 22 is formed near the lower surface of 3b, and each of the cutout portions 13a is formed so that the cutout portion 13a intersects with the fin 13.
Is in contact with the lower plate surface. Further, the seal member 23 is formed to have a substantially sectional shape, and the vertical portion 23a projects upward from the rear portion of the horizontal portion. The structure and basic operation of this embodiment other than those described above are the same as those of the conventional one shown in FIGS. 6 and 7. Next, the operation of this embodiment will be described. 2 ventilation paths
When performing one operation, the switching damper 8 is at the position shown by the solid line in FIG. 1, and the front edge portion thereof is gravitationally applied to the vertical portion 23a of the seal member 23 fixed to the rear edge portion 22a of the partition plate 22. Abutted and supported. Therefore, the heat exchanger 4
There is no gap between the rear surface and the front side edge of the switching damper 8, and at the portion where the fin 13 of the heat exchanger 4 and the partition plate 22 intersect, the cut-down portion 13a of the fin 13 is the lower plate of the partition plate 22. The upper plate surface of the partition plate 22 is pressed against the surface of the cut 13b of the fin 13 by abutting against the surface. Therefore, the upper fan 5a
When the rotation speeds of the lower fan 5b and the lower fan 5b are different from each other, even if a pressure difference occurs in the upper air passage 7a and the lower air passage 7b, they are not affected by each other fan, and the pressure is always stable. Becomes As a result, the occurrence of surging, abnormal noise, and reverse suction, which have been problems in the past, is eliminated, stable air blowing is maintained, and stable air conditioning can be performed. Further, the partition plate 22 is inserted into the heat exchanger 4 to partition most of the fin 13 in the front-rear direction into upper and lower parts, and the cut-down portion 13a on the lower side of the partition plate 22 adheres to the lower plate surface of the partition plate 22. Unlike the one in which the part of the partition plate to be inserted into the heat exchanger is comb-shaped and the fins are inserted between the tooth spaces, the gap between the fins 13 and the partition plate 22 is eliminated, and the heat exchanger 4 using the partition plate 22 is provided. The branching efficiency of can be improved. Further, when the operation is performed with one ventilation passage, the switching damper 8 is at the position shown by the chain line in FIG. 1, and the same operation as the conventional one described above is performed. Although the seal member 23 is fixed to the partition plate 22 in the above-described embodiment, this invention fixes the seal member 23 to the lower surface of the front edge of the switching damper 8 as shown in FIG. You may make it contact | abut on the upper surface of the rear edge part 22a. Further, in the above embodiment, the fin 13 of the heat exchanger 4 is used.
Although the cut-off portion 13a that abuts the lower plate surface of the partition plate 22 is formed in the above, the present invention may provide the fin with a cut-down portion that abuts the upper, lower plate surface or upper plate surface of the partition plate. .

[Effect of device]

As described above, the air conditioner of the present invention, in the case where the ventilation passages partitioned by the switching damper are two in operation,
The partition plate inserted into the heat exchanger vertically branches the substantially central part of the heat exchanger, and the front edge of the switching damper is attached to the rear edge of the partition plate protruding from the rear surface of the heat exchanger. Since the parts are brought into contact with each other via the sealing material, the following effects can be obtained. That is, by contacting the partition plate and the switching damper via the seal member, the upper and lower ventilation passages can be reliably branched without a gap, and the rear surface of the heat exchanger and the front side edge portion of the switching damper can be reliably separated. Since there is no air flow in the heat exchanger, and the heat exchanger is branched up and down by the partition plate, and the cut-down portion formed in the fin of the heat exchanger is in contact with the partition plate surface, By eliminating the gap with the partition plate, the upper and lower ventilation passages are reliably branched from inside the heat exchanger. Therefore, even when the rotation speeds of the upper and lower fans are different, the suction forces of the upper and lower fans do not interfere with each other, and the pressure difference in the upper and lower ventilation paths is determined only by the suction force of the upper and lower fans. As a result, there is no surging or abnormal noise, and there is no reverse suction, so efficient and stable ventilation is reliably maintained, and stable air conditioning can be performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an air conditioner according to an embodiment of the present invention, FIG. 2 is an enlarged view of part II of FIG. 1, and FIG. 3 is a partial cross section taken along line III-III of FIG. FIG. 4 is a plan view showing the partition plate of FIG. 1, and FIG. 5 is a vertical sectional side view showing a contact portion between the partition plate and the switching damper according to another embodiment of the present invention.
FIG. 6 is a vertical side view showing a conventional air conditioner, FIG. 7 is a configuration diagram of the same refrigeration cycle, and FIGS. 8 and 9 are schematic side views showing the same and lower simultaneous blowouts and use as a circulator, respectively. It is a figure. 1 ... Air conditioner body, 2 ... Suction port, 3a, 3b ...
Air outlets, 4 ... Heat exchangers, 5a, 5b ... Upper and lower fans, 7 ... Ventilation passages, 7a, 7b ... Upper and lower ventilation passages, 8 ...
... Switching damper, 13 ... Fin, 13a ... Cut down part,
14 ... Refrigerant piping, 22 ... Partition plate, 23 ... Sealing member. The same reference numerals in the drawings indicate the same or corresponding parts.

Front page continued (72) Inventor Hiroyuki Umemura 3-18-1, Oka, Shizuoka-shi, Shizuoka Mitsubishi Electric Corporation Shizuoka Plant (72) Inventor Kenji Matsuda 3-18-1, Oka, Shizuoka-shi, Shizuoka Machine Co., Ltd. Shizuoka Factory (72) Inventor Tetsuji Okada 3-18-1, Oshia, Shizuoka City, Shizuoka Prefecture Mitsubishi Electric Corporation Shizuoka Factory (72) Inventor Hidenori Ishioka 3-18-1, Oka, Shizuoka City Shizuoka Works, Mitsubishi Electric Corporation

Claims (1)

[Scope of utility model registration request] 1. A heat exchanger in a main body of an air conditioner provided with a suction port and air outlets located above and below the suction port, and from the suction port to the air outlet via the heat exchanger. An air passage leading to the upper and lower air outlets, and a lower fan, and an upper air passage and an upper air passage, which are independent from each other in the middle of the upper air passage and the lower air outlet. In an air conditioner provided with a switching damper for branching into a ventilation path, the heat exchanger is divided into upper and lower parts by a partition plate inserted into the heat exchanger so that the center of the heat exchanger in the vertical direction is vertically divided into the partition of the fins of the heat exchanger. Forming cut-off portions near the portion intersecting the plate, abutting these cut-down portions on the partition plate surface, and the front side edge of the switching damper at the rear side edge portion protruding from the rear surface of the heat exchanger of the partition plate. An air conditioner in which parts are brought into contact with each other via a seal member.