JP2006153332A - Outdoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit for an air conditioner capable of reducing noise and improving heat exchanging efficiency by uniforming a distribution of wind speed of a heat exchanger of the outdoor unit. <P>SOLUTION: This outdoor unit for the air conditioner is mounted along three side faces 10a, 10b, 10c, and comprises the heat exchanger 3 composed of an upper side heat exchanger 3a and a lower side heat exchanger 3b vertically arranged, and the fan 2 mounted on an upper portion and sucking the air through the heat exchanger 3 to blow out the air upward. As the ventilating resistance in the lower side heat exchanger 3b is smaller than that of the upper side heat exchanger 3a, the distribution of wind speed in the height direction of the heat exchanger 3 as a whole can be improved in the uniform direction by increasing the quantity of inflow wind from the lower side heat exchanger 3b, thus the noise can be reduced and the heat exchanging efficiency can be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to an outdoor unit of an up-blowing type air conditioner provided with a fan that blows air upward.

  A conventional outdoor unit of an air conditioner will be described with reference to FIGS. FIG. 5 is a plan cross-sectional view showing a schematic configuration of an outdoor unit of a conventional air conditioner, and FIG. 6 is a schematic configuration diagram of the interior viewed from the front of the outdoor unit.

  In FIG. 5, a conventional outdoor unit 1 of an air conditioner includes a fan 5 that blows air in the outdoor unit 1 upward from the upper surface side of the outdoor unit 1, that is, the top blower type outdoor unit 1. When viewed from the upper surface side of the outdoor unit 1, the U-shape is formed so as to be parallel to the side surfaces of the outdoor unit 1 from one side surface 17c of the outdoor unit 1 to the center of both side surfaces 17d connected to the one side surface. A heat exchanger 49 formed in a shape and having a constant length is installed. And the air inlet 26 is provided in the part of the side surface of the outdoor unit 1 in which the said heat exchanger 49 of such a shape follows (for example, refer patent document 1).

In FIG. 5, when the fan 5 rotates, air flows into the outdoor unit 1 from the suction port 26 of the outdoor unit 1 through the heat exchanger 49, and the air that flows into the outdoor unit 1 5 is blown upward from the upper surface side of the outdoor unit 1, and heat exchange between the refrigerant and air in the refrigeration cycle is performed in the heat exchanger 49 in the outdoor unit 1.
JP 2004-125264 A

  However, in the outdoor unit 1 of the air conditioner, as shown in FIG. 6, since the height is relatively long with respect to the width, the heat exchanger close to the fan 5 when air flows in from the suction port 26. In the upper part of the heat exchanger 49, the wind speed is relatively fast, and in the vicinity of the lower part of the heat exchanger 49 far from the fan 5, the air speed is slow in the entire heat exchanger 49. The heat exchange efficiency of the air conditioner decreases, and this decrease leads to a decrease in energy saving performance, which is contrary to the demand for improving the energy saving performance of the air conditioner. In addition, there was a problem that the flow was disturbed due to the uneven wind speed distribution, the aerodynamic noise increased, and the frosting of the heat exchanger during the heating operation was accelerated, leading to a decrease in capacity. .

  The present invention solves the above-mentioned conventional problems, uniformizes the entire wind speed distribution from the lower part to the upper part of the heat exchanger, improves the heat exchange efficiency, reduces noise, and reduces the energy of the air conditioner. It aims at providing the outdoor unit of the air conditioner which improved consumption efficiency.

  In order to solve the above-described conventional problems, an air conditioner according to the present invention is provided along at least three side surfaces, and includes a heat exchanger composed of an upper side heat exchanger and a lower side heat exchanger arranged vertically. And a fan that is arranged in the upper part and sucks air through the heat exchanger and blows it upward, so that the ventilation resistance in the lower heat exchanger is smaller than that of the upper heat exchanger. Thus, the inflow air volume from the lower heat exchanger can be increased, the wind speed distribution in the height direction of the entire heat exchanger can be improved in a uniform direction, and the heat exchange efficiency can be improved with low noise.

  The air conditioner of the present invention can improve the heat exchange efficiency and the energy consumption efficiency of the air conditioner by uniformizing the entire wind speed distribution from the lower part to the upper part of the heat exchanger. Is.

  According to a first aspect of the present invention, there is provided a heat exchanger including an upper side heat exchanger and a lower side heat exchanger which are provided along at least three side surfaces, and which are arranged above and below. A fan that sucks air through and blows out upward, and the ventilation resistance in the lower heat exchanger is made smaller than that in the upper heat exchanger. By increasing the air velocity distribution in the height direction of the entire heat exchanger in a uniform direction, the heat exchange efficiency can be improved with low noise.

  In the second invention, in particular, the length of the lower heat exchanger of the first invention is made longer than that of the upper heat exchanger, and the ventilation resistance of the lower heat exchanger is that of the upper heat exchanger. It becomes smaller than that, and the amount of inflow air from the lower heat exchanger increases, improving the wind speed distribution in the height direction of the entire heat exchanger in a uniform direction, and improving heat exchange efficiency with low noise.

  3rd invention makes the pipe diameter of the refrigerant | coolant piping of the upper side heat exchanger of 1st or 2nd invention larger than that of a lower side heat exchanger, and the ventilation resistance of a lower side heat exchanger is upper It becomes smaller than that of the side heat exchanger, the amount of air flowing in from the lower side heat exchanger is increased, the improvement of the wind speed distribution is further promoted, and the heat exchange efficiency can be improved. Moreover, since the pipe diameter of the lower heat exchanger is relatively small, the dead water area in the wake of the pipe is small, and noise generation can be suppressed.

  The fourth invention is such that the fin pitch of the upper heat exchanger of any one of the first to third inventions is smaller than that of the lower heat exchanger, and the ventilation resistance of the lower heat exchanger is the upper side. It is smaller than that of the heat exchanger, further promoting the heat transfer of the upper heat exchanger with a fast inflow air speed, and increasing the inflow of air from the lower heat exchanger to further improve the wind speed distribution In addition, the heat exchange efficiency can be improved. Moreover, since frost reaches the fins of the heat exchanger during heating operation relatively evenly, it leads to prevention of a rapid decrease in the heating and low temperature capability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiment.

(Embodiment 1)
FIG. 1 is a plan cross-sectional view showing a schematic configuration of an outdoor unit of an air conditioner according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a schematic internal configuration viewed from the front of the outdoor unit. is there.

  1 and 2, a blowout port 2a is provided on the upper surface of the outdoor unit 1, and a bell mouth that guides the blown air and air in the outdoor unit 1 are blown upward and a motor 8 below the blowout port 2a. The fan 2 that is rotationally driven is provided. Below the fan 2, a heat exchanger 3, a compressor 6, an accumulator 7, an electrical component 5 that controls electrical components such as the compressor 6, and the like are housed.

  As shown in FIG. 1, when the heat exchanger 3 is viewed from the upper surface side of the outdoor unit 1, both end portions are located on one side surface, that is, the side surface 10 on the front side, among the four side surfaces of the outdoor unit 1. It is provided along the other three side surfaces, that is, one side surface 10a, the other side surface 10b, and the back side surface 10c.

  Each of the side surfaces 10a, 10b, and 10c is provided with a suction port 11 for taking in outside air.

  Moreover, the heat exchanger 3 is comprised from the upper side heat exchanger 3a and the lower side heat exchanger 3b which were piled up and down, as shown in FIG.

  Further, in the heat exchanger 3, the length of the upper side heat exchanger 3a is partially shorter than the length of the lower side heat exchanger 3b, and the upper side heat exchanger 3a becomes shorter. Instead, a partition plate 4 is provided instead, and a part of the upper part is blocked so that air from outside does not flow directly into the outdoor unit 1 without passing through the heat exchanger 3. Yes.

  The operation and action of the outdoor unit of the air conditioner configured as described above will be described.

  When the air conditioner is activated and the fan 2 is rotated by the motor 8, a flow of air flowing from the suction port 11 through the heat exchanger 3 into the outdoor unit 1 is generated as shown in FIG. The air that flows into the outdoor unit 1 and passes through the heat exchanger 3, that is, the air that has exchanged heat with the refrigerant flowing in the heat exchanger 3 passes through the fan 2 and passes above the outdoor unit 1. The air is blown out from the provided outlet 2a.

  When the outside air is sucked into the heat exchanger 3, if the length of the heat exchanger 3 is constant from the lower side to the upper side as in the prior art, the lower side heat exchanger far from the fan 2 The air sucked into the air has a slow wind speed, and the wind speed distribution is uneven in the height direction of the heat exchanger 3, and the heat exchange efficiency with the refrigerant is reduced accordingly, but according to the present embodiment, By making the length of the upper side heat exchanger 3a having a relatively high wind speed shorter than that of the lower side heat exchanger 3b, the wind speed in the upper side heat exchanger 3a is decreased, and the lower side heat exchanger 3b having a low ventilation resistance is reduced. Since the wind speed of the air is relatively high, the wind speed distribution of the entire heat exchanger 3 is uniformly improved, the heat exchange efficiency can be improved with low noise, and the energy consumption efficiency of the air conditioner can be improved. Is.

  In the present embodiment, the heat exchanger 3 is not limited to a plate fin type heat exchanger, and various types of heat exchangers such as a cross fin type can be used.

  The fan 2 is not limited to a propeller fan, and various types of heat exchangers such as a mixed flow fan can be used.

(Embodiment 2)
FIG. 3 is an enlarged view of a main part of the heat exchanger of the outdoor unit of the air conditioner according to the second embodiment of the present invention. In addition, about the same part as the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 3, the pipe diameter of the refrigerant pipe 3c of the upper side heat exchanger 3a is set larger than the pipe diameter of the refrigerant pipe 3c ′ of the lower side heat exchanger 3b. Compared to a heat exchanger provided with refrigerant pipes having the same pipe diameter from the upper side to the lower side, the ventilation resistance of the lower part side heat exchanger 3b is lower than that of the upper side heat exchanger 3a, and the air As a result, the overall wind speed distribution can be improved uniformly, and at the same time, the heat exchange efficiency can be improved. Further, since the pipe diameter of the refrigerant pipe 3c 'of the lower heat exchanger 3b is relatively small, the dead water area in the downstream of the refrigerant pipe 3c' is small, and noise can be reduced.

(Embodiment 3)
FIG. 4 is an enlarged view of a main part of the heat exchanger of the outdoor unit of the air conditioner according to the third embodiment of the present invention. In addition, about the same part as the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, the fin pitch P1 of the fins 3d of the upper heat exchanger 3a is made denser than the fin pitch P2 of the fins 3d ′ of the lower heat exchanger 3b (P1 <P2). The heat transfer of the fast upper heat exchanger 3a is further promoted and the inflow amount of air from the lower heat exchanger 3b having a relatively coarse fin pitch is increased to further improve the wind speed distribution, thereby improving the heat exchange efficiency. Can be improved. Further, since frost is relatively uniformly deposited on the fins 3d and 3d 'of the heat exchanger during the heating operation, it is possible to prevent a rapid decrease in the heating low-temperature capability.

  As described above, the outdoor unit of the air conditioner according to the present invention is uniform in the entire wind speed distribution from the lower part to the upper part of the heat exchanger, is low in noise, and improves the heat exchange efficiency. Since the energy consumption efficiency of the machine can be improved, any top-blowing outdoor unit can be applied to the outdoor unit of an air conditioner having various configurations.

Plan sectional drawing which shows schematic structure of the outdoor unit of the air conditioner in Embodiment 1 of this invention Schematic diagram of the interior as seen from the front of the outdoor unit The principal part enlarged view of the heat exchanger of the outdoor unit of the air conditioner in Embodiment 2 of this invention (A part of FIG. 2) The principal part enlarged view of the heat exchanger of the outdoor unit of the air conditioner in Embodiment 3 of this invention (A part of FIG. 2). Plan sectional drawing which shows schematic structure of the outdoor unit of the conventional air conditioner Schematic diagram of the interior as seen from the front of the outdoor unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Fan 3 Heat exchanger 3a Upper side heat exchanger 3b Lower side heat exchanger 3c, 3c 'Refrigerant piping 3d, 3d' Fin 4 Partition plate 8 Motor 10, 10a, 10b, 10c Side

Claims (4)

A heat exchanger comprising an upper heat exchanger and a lower heat exchanger which are provided along at least three side surfaces and which are arranged above and below; And an air conditioner outdoor unit characterized in that the ventilation resistance in the lower heat exchanger is smaller than that in the upper heat exchanger. The outdoor unit for an air conditioner according to claim 1, wherein the length of the lower heat exchanger is longer than that of the upper heat exchanger. The outdoor unit for an air conditioner according to claim 1 or 2, wherein the diameter of the refrigerant pipe of the upper side heat exchanger is made larger than that of the lower side heat exchanger. The outdoor unit for an air conditioner according to any one of claims 1 to 3, wherein a fin pitch of the upper heat exchanger is made smaller than that of the lower heat exchanger.

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