WO2018054027A1

WO2018054027A1 - Coil draught fan structure

Info

Publication number: WO2018054027A1
Application number: PCT/CN2017/077699
Authority: WO
Inventors: 林炎虎; 黎健辉
Original assignee: 中山大洋电机股份有限公司
Priority date: 2016-09-22
Filing date: 2017-03-22
Publication date: 2018-03-29

Abstract

A coil draught fan structure comprises an air blower (1), a draught fan housing (2) and a heat exchanger (3). The air blower (1) comprises a volute casing (11), a rotor (12) and a motor (13). The rotor (12) is installed in a first cavity (111) of the volute casing (11). The volute casing (11) is provided with a first air inlet (112) and a first air outlet (113). An output shaft (131) of the motor (13) extends into the first cavity (111) and is connected to the rotor (12). The draught fan housing (2) is provided with a second cavity (21), one side of the draught fan housing (2) is provided with a second air inlet (22), and the other side of the draught fan housing (2) is provided with a second air outlet (23). The heat exchanger (3) is installed in the second cavity (21), and located between the second air inlet (22) and the second air outlet (23). A volute tongue (110) at the first air outlet (113) of the volute casing (11) is connected to a slant plate (4), the higher end of the slant plate (4) is connected to the volute tongue (110) at the air outlet of the volute casing (11), and the lower end of the slant plate (4) inclines toward the heat exchanger (3) and extends downward. The first air outlet of the volute casing (11) is provided with a static pressure restoration apparatus, and on the basis of the static pressure restoration apparatus, the parameters of the volute casing (11) are set to satisfy the following conditions: 1.65≥2*b2/D2≥1.45, where b2 is the effective width of the rotor (12), and D2 is the outer diameter of the rotor (12). The coil draught fan structure can effectively improve the operating efficiency of the motor and the operating efficiency of the draught fan, and can also reduce the noise of the draught fan.

Description

Coil fan structure

Technical field:

The invention relates to a coil fan structure.

Background technique:

The existing coil fan structure is as shown in FIG. 1 , FIG. 2 and FIG. 3 , and includes a blower 100 , a wind box body 200 and a heat exchanger 300 . The blower 100 includes a volute 101 , a wind wheel 102 and a motor 103 . The wind wheel 102 is mounted inside the first cavity 104 of the volute 101. The volute 101 is provided with a first air inlet 105 and a first air outlet 106, a first air inlet 105 and a first air outlet 106 and a first cavity 104. The output shaft of the motor 103 extends into the first cavity 104 and is connected to the wind wheel 102. The wind chamber body 200 is provided with a second cavity 201, and the wind chamber body 200 is provided with a second air inlet 202, the wind chassis. A second air outlet 203 is disposed on the other side of the body 200. The heat exchanger 300 is mounted inside the second cavity 201 and located between the second air inlet 202 and the second air outlet 203.

The above coil fan structure has the following disadvantages:

1) Due to the unreasonable design of the parameter ratio between the volute 101 and the wind wheel 102, the efficiency and noise of the fan are affected, and the operating efficiency of the motor is reduced.

2) The first air outlet 106 of the volute 101 is provided with a volute tongue, and the inner surface of the volute tongue is mostly straight in the axial direction, but generally, the airflow speed on both sides of the volute tongue is slow. The intermediate airflow speed is fast, and this structure causes the fan to have high noise, low airflow efficiency, and uneven airflow velocity.

3) In addition, since the cross section of the wind enclosure body 200 is a rectangular parallelepiped structure, when the heat exchanger 300 is vertically mounted, the structure has the following problem: when the first air outlet 106 of the volute 101 enters the wind enclosure body 200, the wind enclosure The region in the lower left corner of the body 200 forms a vortex flow, and the wind blown by the air blower 100 does not directly reach the heat exchanger 300 at the air outlet of the volute, and peeling occurs, and the noise increases, which may affect the efficiency of the fan.

Summary of the invention:

The object of the present invention is to provide a coil fan structure which can effectively improve the operating efficiency of the motor and the operating efficiency of the fan, and can also reduce the noise of the fan.

The object of the present invention is achieved by the following technical solutions.

A coil fan structure includes a blower, a wind casing body and a heat exchanger, wherein the blower comprises a volute, a wind wheel and a motor, the wind wheel is installed in the first cavity of the volute, and the volute is provided with the first The air inlet and the first air outlet, the output shaft of the motor extends into the first cavity and is connected with the wind wheel, the wind chamber body is provided with a second cavity, and the wind chamber body is provided with a second air inlet, the wind box body The other side is provided with a second air outlet, the heat exchanger is installed in the second cavity and is located between the second air inlet and the second air outlet, and the volute portion of the first air outlet of the volute is connected with a slanting plate and inclined The high end of the plate is connected with the volute tongue of the volute air outlet, and the lower end of the swash plate extends obliquely downward toward the heat exchanger, and the first air outlet of the volute is provided with a static pressure recovery device. On the basis of the pressure recovery device, the volute parameter setting satisfies the following conditions: 1.65 ≥ 2 * b2 / D2 ≥ 1.45, b2 is the effective width of the wind wheel; D2 is the outer diameter of the wind wheel.

The ratio of the effective width of the wind wheel to the width of the volute is 0.98 ≥ 2 * b2 / B2 ≥ 0.845, and B2 is the volute width.

The ratio of the arc radius of the first air inlet of the volute and the outer diameter of the wind wheel is 0<r/D2≤0.069, and r is the radius of the arc of the first air inlet.

The static pressure recovery device described above is a first static pressure recovery plate respectively mounted on both sides of the first air outlet of the volute, and the bottom end of the first static pressure recovery plate is connected to both sides of the inclined plate, first The static pressure return plate extends to a midsection of the swash plate, and the first static pressure return plate and the slant plate extend into the second cavity.

The first static pressure recovery plate described above is a vertical flat plate, the second air inlet is located at an upper portion of one side of the wind casing body, and the second air outlet is located at an upper portion of the other side of the wind casing body.

The wind enclosure body described above comprises a top panel, a bottom panel, a rear panel and a side panel. The bottom panel comprises a lower left panel and a guiding panel connected to the lower left panel. The guiding panel is arranged obliquely upward, and the high end of the guiding panel is connected to the first The bottom of the two air outlets, wherein the top plate, the lower left panel, the rear panel and the side panels are surrounded by a rectangular structure, and the second air inlet is disposed at the top of the rear panel.

The heat exchanger described above is installed vertically or obliquely, and the upper and lower ends of the heat exchanger are connected to the top plate and the bottom plate.

The left lower panel and the top plate are arranged in parallel, and the heat exchanger is installed vertically or obliquely, and the upper and lower ends of the heat exchanger are connected with the top plate and the bottom plate.

The air blower described above comprises two volutes, two wind wheels and one motor, and two wind inlets are arranged on one side of the wind box body, and two volutes are respectively located on two sides of the motor, and the wind wheel is disposed Inside the volute, the motor has two shaft extension ends connected to the two sides of the wind wheel, and the first air outlets of the two volutes are respectively connected with two second air inlets on one side of the wind box body.

The inner surface of the volute tongue of the first air outlet of the volute described above is an air guiding surface, and the air guiding surface comprises a side air guiding surface on the middle air guiding surface and two sides on the middle air guiding surface, and a side portion The height of the wind guiding surface is higher than the height of the intermediate air guiding surface, and the side wind guiding surface and the intermediate air guiding surface are arranged in parallel.

The intermediate wind guiding surface and the side air guiding surface are parallel to the central axis of the first air inlet.

The intermediate wind guiding surface and the side air guiding surface are rounded, and the ratio of the length of the side wind guiding surface on the one side to the total length of the volute tongue is 0.25 to 0.35.

The intermediate wind guiding surface and the side air guiding surface smoothly transition, and the transition surface between the intermediate air guiding surface and the side air guiding surface is provided with a circular chamfer.

The height difference between the side air guiding surface and the intermediate air guiding surface and the outer diameter ratio of the wind wheel are 0.01 to 0.015.

The diagonal position of the swash plate in the wind chamber is provided with a second static pressure recovery plate, the heat exchanger is installed between the swash plate and the second static pressure recovery plate, and the heat exchanger is vertical in the wind casing body. Or tilting the installation, the second air outlet is disposed at the bottom of the other side of the wind casing and below the second static pressure recovery plate.

The lower end of the second static pressure recovery plate is connected to the top of the second air outlet, and the high end of the second static pressure recovery plate extends in the direction of the heat exchanger, and the inclined plate is installed when the heat exchanger is installed obliquely. The second static pressure recovery plate and the heat exchanger are installed in parallel in the wind casing body.

The swash plate and the second static pressure return plate are provided with a plurality of through holes.

a third cavity is defined between the swash plate and the wind casing body, a sound absorbing material is installed in the third cavity, and a fourth cavity is formed between the second static pressure recovery plate and the wind casing body. A sound absorbing material is installed in the cavity.

Compared with the prior art, the invention has the following effects:

1) The first air outlet of the volute is provided with a static pressure recovery device, based on the static pressure recovery device, the worm The shell (11) parameter setting satisfies the following conditions: 1.65 ≥ 2 * b2 / D2 ≥ 1.45, b2 is the effective width of the wind wheel (12); D2 is the outer diameter of the wind wheel (12), effectively improving the operating efficiency of the motor and the operating efficiency of the fan ;

2) The ratio of the effective width of the wind wheel to the width of the volute: 0.98 ≥ 2 * b2 / B2 ≥ 0.845, B2 is the width of the volute, which further effectively improves the operating efficiency of the motor and the operating efficiency of the fan;

3) The arc radius of the first air inlet of the volute and the outer diameter of the wind wheel: 0<r/D2≤0.069, r is the arc radius of the first air inlet, which effectively improves the operating efficiency of the motor and the operating efficiency of the fan;

4) The static pressure recovery device is respectively installed with a first static pressure recovery plate on both sides of the first air outlet of the volute, and the bottom end of the first static pressure recovery plate is connected with both sides of the inclined plate, first The static pressure recovery plate extends to a middle position of the swash plate, and the first static pressure recovery plate and the slant plate extend into the second cavity, and the first static pressure recovery plate is made of a sound absorbing material, which can effectively reduce noise.

5) The utility model has a simple structure, and the wind guiding surface of the volute tongue is set as an intermediate air guiding surface and a side air guiding surface on both sides of the intermediate air guiding surface, and the height of the side air guiding surface is higher than that of the intermediate air guiding surface. The height is high, so that the distance between the two ends of the volute tongue and the wind wheel is smaller than the distance between the middle part and the wind wheel, thereby increasing the wind speed at both ends of the volute tongue, making the wind speed of the volute air outlet more uniform, reducing fan noise and improving air volume efficiency;

6) By improving the structure of the volute, the wind speed of the volute air outlet is more uniform, so that the air blower efficiency of the fan is 1% to 2% higher than that of the existing fan, and the energy saving effect is achieved; in terms of noise, the ear Listening can feel that the blade passes through the sound much lower and the noise value is also significantly reduced.

7) The diagonal position of the swash plate in the wind casing is provided with a second static pressure recovery plate, the heat exchanger is installed between the swash plate and the second static pressure recovery plate, and the heat exchanger is vertical or inclined in the wind casing body. Installation, the second air outlet is disposed at the bottom of the front panel of the wind enclosure and below the second static pressure recovery panel, so that the blower is directly blown to the heat exchanger, effectively avoiding the phenomenon of snail flow, improving efficiency, and reducing Air pressure loss through the heat exchanger to improve heat dissipation;

8) When the heat exchanger is installed obliquely, the swash plate, the second static pressure return plate and the heat exchanger are installed in parallel in the wind casing body, and the first static pressure recovery plate and the second static pressure recovery plate are provided with a plurality of The through holes of the through holes, the swash plate and the second static pressure return plate can exert the effect of resonance silencer and reduce noise;

9) a third cavity is defined between the swash plate and the wind casing body, and the third cavity is provided with a sound absorbing material, A fourth cavity is formed between the second static pressure recovery plate and the wind casing body, and the sound absorption material is installed in the fourth cavity, which can effectively reduce noise.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is an exploded view showing the structure of a conventional coil fan;

Figure 2 is a plan view showing the structure of a conventional coil fan;

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

Figure 4 is a perspective view of a first embodiment of the present invention;

Figure 5 is an angular exploded view of the first embodiment of the present invention;

Figure 6 is another angular exploded view of the first embodiment of the present invention;

Figure 7 is a plan view of the first embodiment of the present invention;

Figure 8 is a cross-sectional view taken along line B-B of Figure 7;

Figure 9 is a front elevational view of the volute of the first embodiment of the present invention;

Figure 10 is a cross-sectional view taken along line C-C of Figure 9;

Figure 11 is an experimental comparison diagram of the first embodiment of the present invention.

Figure 12 is a perspective view of the volute of the fan provided in the second embodiment of the present invention;

Figure 13 is a front elevational view of the volute of the fan of the second embodiment of the present invention;

Figure 14 is a cross-sectional view taken along line D-D of Figure 13;

Figure 15 is an enlarged view of E at Figure 14;

Figure 16 is a right side view of the volute of the fan provided in the second embodiment of the present invention;

Figure 17 is a cross-sectional view taken along the line F-F of Figure 16;

18 is a schematic structural view of a volute tongue in a volute of a fan provided in Embodiment 2 of the present invention;

Figure 19 is an enlarged view of the portion H of Figure 18;

Figure 20 is a perspective view of the fan provided in the second embodiment of the present invention;

Figure 21 is a comparison diagram of characteristic curves of the fan and the existing fan according to the second embodiment of the present invention;

Figure 22 is a perspective view of the third embodiment of the utility model;

Figure 23 is another perspective view of the third embodiment of the utility model;

Figure 24 is an exploded perspective view showing the third embodiment of the utility model;

Figure 25 is a front elevational view of the third embodiment of the utility model;

Figure 26 is a cross-sectional view taken along line I-I of Figure 25;

Figure 27 is a view in the direction of arrow J in Figure 26;

detailed description:

The present invention will be further described in detail below through the specific embodiments and the accompanying drawings:

Embodiment 1:

As shown in FIG. 4 to FIG. 10, the present invention is a coil fan structure including a blower 1, a wind casing body 2 and a heat exchanger 3, and the blower 1 includes a volute 11, a wind wheel 12 and a motor 13, The wind wheel 12 is mounted inside the first cavity 111 of the volute 11. The volute 11 is provided with a first air inlet 112 and a first air outlet 113. The output shaft 131 of the motor 13 extends into the first cavity 111 and the wind wheel. 12 is connected and installed, the wind chamber body 2 is provided with a second cavity 21, the wind chamber body 21 is provided with a second air inlet 22, and the other side of the wind box body 2 is provided with a second air outlet 23, and the heat exchanger 3 is installed at The second cavity 21 is located between the second air inlet 22 and the second air outlet 23, and the volute 110 of the first air outlet 113 of the volute 11 is connected to a swash plate 4, and the high end of the swash plate 4 and the volute 11 The air vent 110 is connected, and the lower end of the swash plate 4 extends obliquely downward toward the heat exchanger 3, and the first air outlet of the volute 11 is provided with a static pressure recovery device.

The static pressure recovery device is a first static pressure recovery plate 5 respectively mounted on both sides of the first air outlet 113 of the volute 11.

The bottom end of the first static pressure recovery plate 5 is connected to both sides of the swash plate 4, the first static pressure recovery plate 5 extends to the middle position of the swash plate 4, and the first static pressure recovery plate 5 and the swash plate 4 Extending into the second cavity 21.

The first static pressure recovery plate 5 is a vertical flat plate, the second air inlet 22 is located at an upper portion of the side of the wind casing 2, and the second air outlet 23 is located at an upper portion of the other side of the wind casing 2.

The wind enclosure body 2 includes a top panel 24, a bottom panel, a rear panel 27 and a side panel 28, the bottom panel includes a lower left panel 25 and a guide panel 26 connected to the lower left panel 25. The guide panel 26 is disposed obliquely upward. The upper end of the guide plate 26 is connected to the bottom of the second air outlet 23, wherein the top plate 24, the lower left panel 25, the rear plate 27 and the side plate 28 enclose a rectangular structure, and the second air inlet 22 is disposed at the top of the rear plate 27.

The heat exchanger 3 is installed vertically or obliquely, and the upper and lower ends of the heat exchanger 3 are connected to the top plate 24 and the bottom plate.

The lower left panel 25 is disposed in parallel with the top plate 24, and the heat exchanger 3 is vertically or obliquely mounted, and the upper and lower ends of the heat exchanger 3 are connected to the top plate 24 and the lower left panel 25.

The air blower 1 includes two volutes 11, two wind wheels 12 and one motor 13, and two wind inlets 22 are disposed on one side of the wind box body 2, and two volutes 11 are respectively located on the motor 13. On both sides, the wind wheel 12 is placed inside the volute 11, and the motor 13 has two shaft extension ends respectively connected to the two side wind wheels 12, and the first air outlets 113 of the two volutes 11 are respectively arranged on the side of the wind box body 2 The two second air inlets 22 are connected.

As shown in Fig. 11, on the basis of the static pressure recovery device, the parameter setting of the volute 11 satisfies the following conditions: 1.65 ≥ 2 * b2 / D2 ≥ 1.45, b2 is the effective width of the wind wheel 12; D2 is the outer diameter of the wind wheel 12. The ratio of the effective width of the wind wheel 12 to the width of the volute 11 is 0.98 ≥ 2 * b2 / B2 ≥ 0.845, and B2 is the width of the volute 11 . The ratio of the radius of the arc of the first air inlet 112 of the volute 11 to the outer diameter of the wind wheel 12 is: 0 < r / D2 ≤ 0.069, and r is the radius of the arc of the first air inlet 112. According to the above data, the test was carried out: the experimental verification was carried out under the objective conditions set in Table 1:

The experimental parameters in Table 2 are selected as follows: 2b2/D2=1.2625, 2b2/B2=0.796, r/D2=0.075; after experiment, the corresponding efficiency values under different air volume conditions are obtained, and are drawn in Fig. 11 as Curve A1;

The experimental parameters in Table 3 are selected as follows: 2b2/D2=1.4296, 2b2/B2=0.796, r/D2=0.1096; after experiment, the corresponding efficiency values under different air volume conditions are obtained, and are drawn in Fig. 11 as Curve A2;

The experimental parameters in Table 4 are selected as follows: 2b2/D2=1.43, 2b2/B2=0.832, r/D2=0.163; after experiment, the corresponding efficiency values under different air volume conditions are obtained, and are drawn in Fig. 11 as Curve A3;

The experimental parameters in Table 5 are selected: 2b2/D2=1.45, 2b2/B2=0.845, r/D2=0.069; after experiment, the corresponding efficiency values under different air volume conditions are obtained, and are plotted as curves in Fig. 11 A4;

The experimental parameters in Table 6 are selected: 2b2/D2=1.45, 2b2/B2=0.874, r/D2=0.055; after experiment, the corresponding efficiency values under different air volume conditions are obtained, and are plotted as curves in Fig. 11 A5;

The experimental parameters in Table 7 are selected: 2b2/D2=1.48, 2b2/B2=0.894, r/D2=0.047; after experiment, the corresponding efficiency values under different air volume conditions are obtained;

The experimental parameters in Table 8 are selected: 2b2/D2=1.65, 2b2/B2=0.98, r/D2=0.03; after experiment, the corresponding efficiency values under different air volume conditions are obtained;

Curves A1, A2, A3, A4, and A5 are respectively depicted by the above-mentioned six sets of experimental data. The A4 curve and the A5 curve satisfy the snail. Shell 11 parameter setting conditions: 1.65 ≥ 2 * b2 / D2 ≥ 1.45, 0.98 ≥ 2 * b2 / B2 ≥ 0.845, 0 < r / D2 ≤ 0.069, the efficiency is higher in the case of output air volume of 0-10 unit interval The curve A1, the curve A2, and the curve A3 do not satisfy the above conditions, and the efficiency is low in the case where the output air volume is 0-10 unit intervals. In addition, according to the experimental parameters of Tables 7 and 8, compared with the experimental parameters of Table 6, Tables 7 and 8 are more efficient in the case where the output air volume is 0-10 unit intervals, and the range of the output air volume in the actual fan product. In most cases, it runs between 0-10 units, so choosing the most efficient operating parameters in the interval between 0-10 units is the core point of our invention.

Table 1

Table 2

table 3

Table 4

table 5

Table 6

Table 7

Table 8

Embodiment 2:

This embodiment is an improvement of the first embodiment: as shown in FIGS. 12 to 20, the inner surface of the volute 110 of the first air outlet 113 of the volute 11 is the air guiding surface 150, and the air guiding surface 150 includes the middle portion. a wind guiding surface 151 and a side air guiding surface 152 located on both sides of the intermediate air guiding surface 151, the height of the side air guiding surface 152 being higher than the height of the intermediate air guiding surface 151, the side air guiding surface 152 and the middle The wind guiding surfaces 151 are arranged in parallel.

The utility model has a simple structure. By setting the air guiding surface 150 of the volute tongue 110 as the intermediate air guiding surface 151 and the side air guiding surface 152 on both sides of the intermediate air guiding surface 151, the height of the side air guiding surface 152 is higher than the middle. The height of the wind guiding surface 151 is high, so that the distance between the two ends of the volute tongue 110 and the wind wheel 12 is smaller than the distance between the middle portion of the volute tongue 110 and the wind wheel 12, thereby increasing the wind speed at both ends of the volute tongue 110, so that the volute is first out. The wind speed of the tuyere 113 is more uniform.

The intermediate wind guiding surface 151 and the side wind guiding surface 152 are parallel to the central axis L of the first air inlet 112.

The intermediate wind guiding surface 151 and the side air guiding surface 152 described above are provided with rounded corners 155.

The ratio b of the length b of the side wind guiding surface 152 on the one side to the total length a of the volute tongue 15 is b: a = 0.25 to 0.35.

A smooth transition between the intermediate wind guiding surface 151 and the side wind guiding surface 152 is performed.

The transition surface 153 between the intermediate wind guiding surface 151 and the side wind guiding surface 152 is provided with a circular chamfer 154. The circular chamfer 154 enables the wind speed of the first vent 113 of the volute to be more uniform.

A smooth transition between the side wind guiding surface 152 and the inner surface of the volute 11 is described.

The flank 110 is provided with lugs 156 on both sides thereof, and the volute tongue 15 is fixed on the volute 11 by the lugs 156.

The height difference c between the side wind guiding surface 152 and the intermediate air guiding surface 151 and the outer diameter D of the wind wheel 2 are c: D = 0.01 to 0.015.

The performance of the existing fan and the fan described in this embodiment will be specifically compared below. Table 9 shows the stand-alone performance of the existing fan, Table 10 shows the stand-alone performance of the fan of the present embodiment, and Table 11 shows the complete machine test of the existing fan and the fan of the present embodiment under the same air volume. Performance and noise comparison.

The test conditions are as follows:

Standard atmospheric pressure Pan (hPa) = 1013; standard temperature tan (°C) = 25;

Air density ρa (kg / m3) = 1.1767; wind wheel outer diameter D (mm) = 150;

The width of the volute tongue a (mm) = 250.

Table 9

The test conditions are:

The ratio b of the length b of the side wind guiding surface 152 of one side to the total length a of the volute tongue 15 is b: a = 0.28;

The height difference c between the side air guiding surface 152 and the intermediate air guiding surface 151 is 1.5 mm.

Table 10

Table 11

As can be seen from the above, by improving the structure of the volute 11, the wind speed of the first air outlet 113 of the volute 11 is more uniform, as shown in FIG. 21, the air volume efficiency of the fan is made (the air volume at 10-15) The range) is 1% to 2% higher than the existing fan, achieving the effect of energy saving; in terms of noise, the ear can feel that the blade of the wind wheel 12 has a lower pass sound and the noise value is also significantly reduced.

Embodiment 3:

This embodiment is an improvement of the structure of the first embodiment. As shown in FIG. 22 to FIG. 27, the diagonal position of the swash plate 4 in the wind chamber body 2 of the present embodiment is provided with a second static pressure returning plate 41. The heat exchanger 3 is installed between the swash plate 4 and the second static pressure recovery plate 41, and the heat exchanger 3 is vertically or obliquely installed in the wind casing body 2, and the second air outlet 23 is disposed in the wind casing body 2 The bottom of one side is located below the second static pressure recovery plate 41.

The lower end of the second static pressure recovery plate 41 is connected to the top of the second air outlet 23, and the high end of the second static pressure recovery plate 41 extends in the direction of the heat exchanger 3, and the heat exchanger 3 is installed obliquely. At this time, the swash plate 4, the second static pressure recovery plate 41, and the heat exchanger 3 are installed in parallel in the wind casing body 2. A plurality of through holes 42 are defined in the swash plate 4 and the second static pressure return plate 41. The swash plate 4 and the wind chassis body 2 define a third cavity 43 and are installed in the third cavity 43. There is a sound absorbing material 6, a second cavity 44 is formed between the second static pressure recovery plate 41 and the wind casing body 2, and a sound absorbing material 6 is mounted in the fourth cavity 44.

The diagonal position of the swash plate 4 in the wind chamber body 2 of the present invention is provided with a second static pressure recovery plate 41, and the heat exchanger 3 is installed between the swash plate 4 and the second static pressure recovery plate 41, and the heat exchanger 3 is installed obliquely in the wind enclosure 2, the second air outlet 23 is disposed at the bottom of the front panel of the wind enclosure body 2 and below the second static pressure recovery plate 41, so that the blower is directly blown to the heat exchanger 3, effectively Avoid the phenomenon of vortex flow, improve efficiency, and at the same time reduce the pressure loss of air passing through the heat exchanger and improve the heat dissipation effect;

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and scope of the present invention are equivalent. The manner of replacement is included in the scope of protection of the present invention.

Claims

A coil fan structure comprising a blower (1), a wind casing (2) and a heat exchanger (3), the blower (1) comprising a volute (11), a wind wheel (12) and a motor (13) The wind wheel (12) is mounted inside the first cavity (111) of the volute (11), and the volute (11) is provided with a first air inlet (112) and a first air outlet (113), and the motor (13) The output shaft (131) extends into the first cavity (111) and is connected to the wind wheel (12). The wind casing body (2) is provided with a second cavity (21), and the wind casing body (21) The second air inlet (22) is disposed on the side, the second air outlet (23) is disposed on the other side of the wind chamber body (2), and the heat exchanger (3) is installed in the second cavity (21) and located at the second air inlet Between (22) and the second air outlet (23), the volute (110) portion of the first air outlet (113) of the volute (11) is connected to a swash plate (4), and the swash plate (4) The high end of the snail (11) is connected to the volute (110) of the vent of the volute (11), and the lower end of the swash plate (4) extends obliquely downward toward the heat exchanger (3), and the volute (11) The first air outlet is provided with a static pressure recovery device. On the basis of the static pressure recovery device, the parameter setting of the volute (11) satisfies the following conditions: 1.65≥2*b2/D2≥1.45, b2 is the wind wheel (12) Effective width; D2 is the outer diameter of the wind wheel (12).
A coil fan structure according to claim 1, wherein the ratio of the effective width of the wind wheel (12) to the width of the volute (11) is 0.98 ≥ 2 * b2 / B2 ≥ 0.845, and B2 is Volute (11) width.
A coil fan structure according to claim 2, characterized in that the ratio of the arc radius of the first air inlet (112) of the volute (11) and the outer diameter of the wind wheel (12): 0 < r/ D2 ≤ 0.069, r is the radius of the arc of the first air inlet (112).
A coil fan structure according to claim 1 or 2 or 3, wherein the static pressure recovery device is installed on the two sides of the first air outlet (113) of the volute (11). a pressure recovery plate (5), a bottom end of the first static pressure recovery plate (5) is in contact with both sides of the swash plate (4), and the first static pressure recovery plate (5) extends to the swash plate (4) The middle position and the first static pressure returning plate (5) and the swash plate (4) project into the second cavity (21).
A coil fan structure according to claim 4, wherein the first static pressure returning plate (5) is a vertical flat plate, and the second air inlet (22) is located on the side of the wind casing body (2). Upper part, second out The tuyere (23) is located on the upper side of the other side of the wind casing (2).
The coil fan structure according to claim 4, wherein the wind casing body (2) comprises a top plate (24), a bottom plate, a rear plate (27) and a side plate (28). The bottom plate comprises a lower left panel (25) and a guiding plate (26) connected to the lower left panel (25), the guiding plate (26) is arranged obliquely upward, and the high end of the guiding plate (26) is connected to the second air outlet (23) The bottom portion, wherein the top plate (24), the lower left panel (25), the rear plate (27) and the side plate (28) are surrounded by a rectangular structure, and the second air inlet (22) is disposed at the top of the rear plate (27).
A coil fan structure according to claim 4, characterized in that the heat exchanger (3) is installed vertically or obliquely, and the upper and lower ends of the heat exchanger (3) are connected to the top plate (24) and the bottom plate.
A coil fan structure according to claim 7, wherein the bottom plate is arranged in parallel with the top plate (24), and the heat exchanger (3) is installed vertically or obliquely, and the upper and lower ends of the heat exchanger (3) are The top plate (24) and the bottom plate are connected.
A coil fan structure according to claim 4, wherein said blower (1) comprises two volutes (11), two wind wheels (12) and one motor (13). Two second air inlets (22) are arranged on one side of the wind chamber body (2), two volutes (11) are respectively located on two sides of the motor (13), and the wind wheel (12) is placed on the volute (11) Inside, the motor (13) has two shaft extension ends connected to the two side wind wheels (12), and the first air outlets (113) of the two volutes (11) are respectively disposed on the side of the wind box body (2) The second air inlet (22) is connected.
A coil fan structure according to claim 1 or 2 or 3, wherein the inner surface of the volute (110) of the first air outlet (113) of the volute (11) is a wind guiding surface (150) The wind guiding surface (150) includes a side wind guiding surface (152) on the intermediate wind guiding surface (151) and a side wind guiding surface (152) on both sides of the intermediate air guiding surface (151), and a height of the side air guiding surface (152) The height of the intermediate wind guiding surface (151) is higher, and the side wind guiding surface (152) and the intermediate air guiding surface (151) are arranged in parallel.
A coil fan structure according to claim 10, wherein said intermediate air guiding surface (151) and side air guiding surface (152) are parallel to a central axis of said first air inlet (112) .
A coil fan structure according to claim 11, wherein said intermediate air guiding surface (151) and side air guiding surface (152) are provided with rounded corners (155), said one side Side air guiding surface The ratio of the length of (152) to the total length of the volute tongue (15) is 0.25 to 0.35.
A coil fan structure according to claim 12, characterized in that a smooth transition between the intermediate wind guiding surface (151) and the side air guiding surface (152), the intermediate air guiding surface (151) The transition surface (153) between the side air guiding surface (152) is provided with a circular chamfer (154).
A coil fan structure according to claim 12, wherein a height difference between said side air guiding surface (152) and said intermediate air guiding surface (151) and an outer diameter of said wind wheel (12) The ratio is 0.01 to 0.015.
A coil fan structure according to claim 1 or 2 or 3, characterized in that: a diagonal position of the swash plate (4) in the wind casing body (2) is provided with a second static pressure recovery plate (41) The heat exchanger (3) is installed between the swash plate (4) and the second static pressure recovery plate (41), and the heat exchanger (3) is installed vertically or obliquely in the wind casing body (2), The second air outlet (23) is disposed at the bottom of the other side of the wind enclosure body (2) and below the second static pressure recovery plate (41).
A coil fan structure according to claim 15, wherein the lower end of the second static pressure recovery plate (41) is in contact with the top of the second air outlet (23), and the second static pressure is The high end of the recovery plate (41) extends in the direction of the heat exchanger (3), and when the heat exchanger (3) is installed obliquely, the swash plate (4), the second static pressure recovery plate (41) and the heat exchanger ( 3) Installed in parallel between the wind enclosure (2).
A coil fan structure according to claim 15, wherein the swash plate (4) and the second static pressure return plate (41) are provided with a plurality of through holes (42).
The coil fan structure according to claim 17, characterized in that the swash plate (4) and the wind casing body (2) enclose a third cavity (43), and the third cavity (43) a sound absorbing material (6) is installed therein, a fourth cavity (44) is formed between the second static pressure recovery plate (41) and the wind casing body (2), and sound absorption is installed in the fourth cavity (44). Material (6).