JP4687030B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner having a heat exchanger therein.

  In recent years, with the progress of higher efficiency due to the effects of energy-saving regulations, in order not to impair the design, it is necessary to form heat exchangers without gaps in the size of limited indoor units of air conditioners Has become necessary. Therefore, the shape of the heat exchanger is also arranged so as to surround the upstream portion of the blower impeller. Therefore, various configurations for improving the heat exchange performance of the air conditioner have been proposed (see, for example, Japanese Patent Application No. 2003-280719 of an unpublished in-house application).

  The air conditioner will be described with reference to FIGS.

  The air conditioner main body 1 fixes the heat exchanger 3 and the like, forms a rear surface of the main body 1, forms a front surface of the main body 1, and includes a front panel 2 having a vent hole 2 a, and the vent hole 2 a. The air blower 5 for taking in indoor air and discharging the heat-exchanged air from the air outlet 4 is provided. The heat exchanger 3 includes a heat transfer tube 6 and a number of heat transfer fins 7 through which the heat transfer tube 6 passes.

  The heat transfer fin 7 is provided with a heat transfer tube penetrating portion 7a through which the heat transfer tube 6 passes, and the heat transfer tube penetrating portion is provided so as to prevent the flow of air between the heat transfer tube 6 and the heat transfer tube 6 having a high wind speed distribution. Between the 7a and the heat transfer tube penetrating portion 7a, a substantially horizontal slit-like cut-and-raised portion 7b is provided so as to protrude in the airflow direction.

  Reference numeral 8 denotes a water receiving tray that receives drain water (condensed water) adhering to the heat exchanger 3. In addition, about the front panel 2, the form which opens the front panel 2 and inhales indoor air at the time of driving | operation instead of the ventilation hole 2a may be sufficient. The operations and effects of the above configuration are as follows.

  When the operation of the main body 1 is started, the blower 5 rotates, the indoor air is sucked from the ventilation holes 2a provided in the front panel 2, and heat exchange is performed when passing through the heat exchanger 3, 4 is discharged to the outside. At this time, the heat transfer fins 7 constituting the heat exchanger 3 are cut and raised so as to prevent the air flow between the heat transfer tubes 6 having a high wind speed distribution, so that the deterioration of the heat exchange performance is minimized. The wind speed distribution can be made almost uniform without increasing costs and man-hours, such as by providing a baffle plate or heat exchanger fin crushing, etc., while suppressing the generation of abnormal noise due to uneven wind speed distribution. it can.

  However, the conventional air conditioner contains the heat exchanger 3 without any gaps, and an air purifier and various filters are arranged for improving the product power. Or, because many panels are used, the amount of wind supplied to the indoor unit is limited to the heat exchanger 3 due to the restriction of the suction port, resulting in a difference in wind speed distribution and wind noise. There is a risk that the quality of the heat exchanger 3 may be impaired due to a problem that the performance of the heat exchanger 3 cannot be fully exhibited.

As another conventional technique, in order to suppress the generation of abnormal noise such as wind noise described above, a new rectifying plate is added, a part of the heat transfer fin of the heat exchanger is crushed, and further, the heat transfer tube In some cases, the surface of the heat transfer fin penetrating the tube is provided with a projecting portion that improves the heat exchange performance and a protrusion that blocks the air flow between the heat transfer tubes.

  However, it is not clear which part of the heat exchanger constituted by fins and heat transfer tubes is to be dealt with. In some cases, dealing with unnecessary parts, on the contrary, deteriorates the wind speed distribution and degrades the performance.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an air conditioner having a uniform wind speed distribution.

  In order to solve the above-described conventional problems, an air conditioner according to the present invention is a curved heat exchanger composed of a heat transfer fin and a plurality of heat transfer tubes passing through the heat transfer fin. A blower that supplies air to the surface of the heat transfer fins, and the flow of the air into the area where the area of the heat transfer tube is not projected from the direction in which the air flows and the heat transfer performance is improved. Protrusions that prevent That is, as a characteristic of the curved heat exchanger, the pitch of the heat transfer tubes arranged on the inner side and the outer side of the curved portion is different, so that a difference occurs in the size of the region where there is no projection of the heat transfer tubes from the air flow direction. Providing a protruding portion that hinders the flow of air in a large portion of this region. As a result, the wind speed distribution can be made uniform.

  The air conditioner of the present invention can reduce noise without deteriorating heat exchange performance.

In the first invention, since the interval between the heat transfer tubes in the direction perpendicular to the air flow is different between the upstream side and the downstream side, the area of the region where there is no projection of the heat transfer tube from the air flow direction is The direction of air flow only in the heat transfer fins between the heat transfer tubes where the area of the area where there is no projection of the heat transfer tubes is the maximum from the direction of air flow in the heat exchanger that differs between adjacent heat transfer tubes in the vertical direction And a protrusion that is substantially perpendicular to the heat transfer fin. That is, as a characteristic of the curved heat exchanger, the pitch of the heat transfer tubes arranged on the inner side and the outer side of the curved portion is different, so that a difference occurs in the size of the region where there is no projection of the heat transfer tubes from the air flow direction. A large portion of this region has a low resistance and the wind speed remarkably increases, so that the wind speed distribution is disturbed. Therefore, by providing a protrusion that intentionally blocks the air flow at the maximum portion of this region, the wind speed distribution is made uniform.

2nd invention is one of the methods of providing the resistor which interrupts | blocks an air flow intentionally in the area | region where there is no projection of a heat exchanger tube. This is a method that applies airflow resistance by making the fins corrugate in the direction of the length of the heat transfer tube only for the heat transfer fins between the heat transfer tubes where the area of the region where there is no projection of the heat transfer tubes is the maximum from the direction of air flow. There is also a slight effect of passing the wind, which leads to an improvement in heat exchanger capacity.

3rd invention is one of the methods of providing the resistor which obstructs the flow of air intentionally in the area | region where there is no projection of a heat exchanger tube. This is because the heat transfer fins between the heat transfer tubes, where the area of the region where there is no projection of the heat transfer tubes from the direction of air flow so as to prevent the air flow, are the largest compared to other heat transfer tubes. Many can be arranged and heat transfer performance can be improved at the same time.

(Embodiment 1)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is a cross-sectional view of an indoor unit, FIG. 2 is a plan view of a heat transfer fin of a heat exchanger, FIG. 3 is a cross-sectional view along AA ′ in FIG. 2, and FIG. 4 is a cross-sectional view along BB ′ in FIG. . In addition, about the same part as a prior art example, the description is abbreviate | omitted using the same code | symbol and the same name.

  In FIG. 1, a main body 1 fixes a heat exchanger 3 and the like, a chassis 1a that forms the back surface of the main body 1, a front panel 2 that forms a front surface portion of the main body 1, and has ventilation holes 2a; A blower 5 for taking in indoor air from the ventilation hole 2a and discharging the heat-exchanged air from the outlet 4 is provided. The heat exchanger 3 includes a heat transfer tube 6 and a number of heat transfer fins 7 through which the heat transfer tube 6 passes.

  This is the portion S1 that is the largest in the area (S1, S2, S3. A substantially horizontal slit-like cut-and-raised portion 7a is provided in the area S1 so as to protrude in the airflow direction. Although not particularly shown, the other portions are provided with cut-and-raised portions 7b for improving the heat exchanging performance as in the prior art.

  Reference numeral 8 denotes a water receiving tray that receives drain water (condensed water) adhering to the heat exchanger 3. In addition, about the front panel 2, not the ventilation hole 2a but the form which opens the front panel 9 and inhales indoor air at the time of a driving | operation may be sufficient.

  When the operation of the main body 1 is started, the blower 5 rotates, the indoor air is sucked from the ventilation holes 2 a provided in the front panel 9, and heat is exchanged when passing through the heat exchanger 3. 4 is discharged to the outside. At this time, because the heat transfer fins 7 constituting the heat exchanger 3 are cut and raised so as to prevent the air flow between the heat transfer tubes 6 having a high wind speed distribution, the deterioration of the heat exchange performance is minimized. However, the wind speed distribution is made substantially uniform, and the generation of abnormal noise due to the uneven wind speed distribution can be suppressed.

(Embodiment 2)
As in the first embodiment, as shown in FIG. 5, a portion S1 that is the largest in the area (S1, S2, S3...) Of the projected portion without the heat transfer tube, as viewed from the surface of the heat exchanger 3 in FIG. A corrugated fin 7c that is bent in a long direction is provided. 6 shows an AA ′ cross section of FIG.

  By providing the resistor that intentionally obstructs the air flow, the wind speed distribution is made substantially uniform, and the generation of noise due to the uneven wind speed distribution can be suppressed. In addition, there is a slight effect of passing the wind, which leads to an improvement in heat exchanger capacity.

(Embodiment 3)
As in the first embodiment, as shown in FIG. 7, a portion S1 that is the largest in the area (S1, S2, S3...) Of the projected portion without the heat transfer tube, as viewed from the surface of the heat exchanger 3 in FIG. It is provided as a resistor that intentionally obstructs the flow of air by defeating the fins 7d. Although FIG. 8 shows that the fan-side fins are tilted, it is also possible to tilt the outer fins. This method can be easily manufactured, and the air flow can be blocked almost certainly. That is, this region works effectively when the draft resistance is extremely low, that is, when the flow is almost surely interrupted.

(Embodiment 4)
As in the first embodiment, as shown in FIG. 9, a portion S1 that is the largest in the area (S1, S2, S3. Many normal heat transfer fins (cutting and raising) 7b are arranged. Thereby, by providing the resistor which obstructs the flow of air intentionally, the wind speed distribution is made substantially uniform, and the generation of abnormal noise due to the unevenness of the wind speed distribution can be suppressed. Moreover, since many heat transfer fins are arranged, the amount of heat transfer is improved.

(Embodiment 5)
As in the first embodiment, the heat exchanger 3 is preliminarily provided with a portion S1 that is the largest in the area (S1, S2, S3...) Of the projected portion without the heat transfer tube as viewed from the surface of the heat exchanger 3 in FIG. By inserting the notch 7E and inserting the metal plate 13 there, a resistor that completely obstructs the air flow is provided. This is effective when air flows remarkably in this region, and the wind speed distribution is made substantially uniform, so that the generation of noise due to the uneven wind speed distribution can be suppressed. Moreover, since the material is made of metal, the heat transfer capability is improved.

(Embodiment 6)
As in the fifth embodiment, the heat exchanger 3 is preliminarily provided with a portion S1 that is the largest in the area (S1, S2, S3...) Of the projected portion without the heat transfer tube as viewed from the surface of the heat exchanger 3 in FIG. A notch is inserted and the metal plate 13A is inserted therein. The metal plate 13A improves the heat transfer capability from the metal plate by providing holes as shown in FIG. 11 to allow air to flow.

(Embodiment 7)
As in the first embodiment, the frame of the filter 11 is positioned upstream of the portion S1 that is the largest in the area (S1, S2, S3...) Of the projected portion without the heat transfer tube, as viewed from the surface of the heat exchanger 3 in FIG. 11b is arranged. As a result, the ventilation resistance is physically increased with respect to the area S1. FIG. 13 is a perspective view of the filter 11 and includes a mesh portion 11a and a frame portion 11b. By adopting this arrangement, a resistor that obstructs the air flow is provided without increasing the number of parts or processing, and the wind speed distribution is made substantially uniform, so that the generation of abnormal noise due to uneven wind speed distribution can be suppressed. . There is an advantage that does not interfere with the assembly and production of the main body.

(Embodiment 8)
As in the first embodiment, the reinforcing material of the main body is located upstream of the portion S1 that is the largest in the area (S1, S2, S3...) Of the projected portion without the heat transfer tube, as viewed from the surface of the heat exchanger 3 in FIG. 12 is arranged in the long direction. As a result, the ventilation resistance is physically increased with respect to the area S1. By adopting this arrangement, a resistor that obstructs the air flow is provided without increasing the number of parts or processing, and the wind speed distribution is made substantially uniform, so that the generation of abnormal noise due to uneven wind speed distribution can be suppressed. . There is an advantage that does not interfere with the assembly and production of the main body.

  As described above, the air conditioner according to the present invention can be applied to applications such as a cross flow type blower mounted on an air conditioner that can improve heat exchanger performance and reduce noise.

Sectional drawing which shows the indoor unit of the air conditioner in Embodiment 1 of this invention Plan view of heat transfer fin of heat exchanger of the same air conditioner A-A 'sectional view of FIG. 2 in the present invention B-B 'sectional view of FIG. 2 in the present invention. The top view of the heat-transfer fin of the heat exchanger of the air conditioner in Embodiment 2 of this invention A-A 'sectional view of FIG. 5 in the present invention. The top view of the heat-transfer fin of the heat exchanger of the air conditioner in Embodiment 3 of this invention A-A 'sectional view of FIG. 7 in the present invention. The top view of the heat-transfer fin of the heat exchanger of the air conditioner in Embodiment 4 of this invention Sectional drawing of the indoor unit of the air conditioner in Embodiment 5 of this invention The top view which shows the metal plate in Embodiment 6 of this invention Sectional drawing of the indoor unit of the air conditioner in Embodiment 7 of this invention The perspective view of the filter in Embodiment 7 of this invention Sectional drawing of the indoor unit of the air conditioner in Embodiment 8 of this invention Cross-sectional view of a conventional air conditioner indoor unit Plan view of heat transfer fins of heat exchanger of conventional air conditioner A-A 'sectional view of FIG. B-B 'sectional view of FIG. 16 in the prior art

DESCRIPTION OF SYMBOLS 1 Air-conditioner main body 2 Panel 3 Heat exchanger 4 Air outlet 5 Air blower 6 Heat transfer tube 7 Heat transfer fin 8 Water tray 9 Front panel 10 Metal plate 11 Filter 12 Reinforcement material

Claims (3)

A heat transfer fin having a cut-and-raised portion for improving heat exchange performance on the surface, a curved heat exchanger having a plurality of heat transfer tubes penetrating the heat transfer fin, and a blower for supplying air to the heat exchanger In the heat exchanger, since the interval between the heat transfer tubes in the direction perpendicular to the air flow is different between the upstream side and the downstream side, the area of the region where there is no projection of the heat transfer tubes from the air flow direction is the air flow. The heat exchanger is different between adjacent heat transfer tubes in a direction perpendicular to the heat transfer tube, and only the heat transfer fins between the heat transfer tubes having the largest area have a surface substantially perpendicular to the air flow direction. An air conditioner provided with a protruding portion that is continuous with a heat fin. A heat transfer fin having a cut-and-raised portion for improving heat exchange performance on the surface, a curved heat exchanger having a plurality of heat transfer tubes penetrating the heat transfer fin, and a blower for supplying air to the heat exchanger In the heat exchanger, since the interval between the heat transfer tubes in the direction perpendicular to the air flow is different between the upstream side and the downstream side, the area of the region where there is no projection of the heat transfer tubes from the air flow direction is the air flow. The heat exchanger is different between adjacent heat transfer tubes in the direction perpendicular to the heat transfer tubes, and only in the heat transfer fins between the heat transfer tubes having the largest area , in the length direction of the heat transfer tubes that obstruct the air flow. An air conditioner provided with bent corrugated fins. A heat transfer fin having a cut-and-raised portion for improving heat exchange performance on the surface, a curved heat exchanger having a plurality of heat transfer tubes penetrating the heat transfer fin, and a blower for supplying air to the heat exchanger In the heat exchanger, since the interval between the heat transfer tubes in the direction perpendicular to the air flow is different between the upstream side and the downstream side, the area of the region where there is no projection of the heat transfer tubes from the air flow direction is the air flow. Heat exchangers that are different between adjacent heat transfer tubes in a direction perpendicular to the heat transfer tube, and the number of the cut-and-raised portions between the heat transfer tubes having the largest area is more than that between other heat transfer tubes. Air conditioner characterized by.

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