Volute, indoor unit and air conditioner

Abstract

The utility model discloses a volute, an indoor unit and an air conditioner, and relates to the technical field of air conditioners, the volute comprises a volute body, an air guide ring and energy dissipation fins, and the volute body is provided with an air inlet and a volute tongue; the air guide ring is arranged at the air inlet; the energy dissipation fins are arranged on the inner side wall of the air guide ring and extend in the radial direction of the air guide ring, and the energy dissipation fins are arranged close to the volute tongue. According to the technical scheme, the noise of the volute can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioner technical field especially relates to a volute, indoor unit and air conditioner. BACKGROUND

[0002] At present, the volute on the market is prone to generate vortex near the volute tongue when the wind wheel is running, and if the internal flow state of the fan is not ideal, more boundary layer detachment will be formed, which will make the vortex larger, and further cause the noise of the volute to increase. SUMMARY

[0003] The main purpose of the utility model is to provide a volute, indoor unit and air conditioner, which aims to reduce the noise of the volute.

[0004] To achieve the above purpose, the volute provided by the utility model is used for an indoor unit, the indoor unit is provided with a wind wheel, and the volute comprises:

[0005] A volute body is provided with an air inlet and a volute tongue;

[0006] A wind guide ring is arranged at the air inlet; and

[0007] Energy dissipation fins are arranged on the inner side wall of the wind guide ring and extend radially towards the wind guide ring, and the energy dissipation fins are arranged close to the volute tongue.

[0008] In an embodiment, the energy dissipation fins are arranged in a fan ring shape.

[0009] In an embodiment, the maximum outer radius of the wind wheel is R, the chord length L of one side of the energy dissipation fins connected with the wind guide ring ranges from 0.48R to 0.65R; and / or

[0010] The maximum outer radius of the wind wheel is R, and the width k of the energy dissipation fins ranges from 0.08R to 0.12R; and / or

[0011] The maximum outer radius of the wind wheel is R, and the opening degree A of the volute body ranges from 0.4R to 0.56R.

[0012] In an embodiment, the installation angle γ of the volute tongue ranges from 72° to 86°.

[0013] In an embodiment, the air outlet of the volute is arranged upwards, the included angle θ1 between the first side edge of the energy dissipation fins along the circumference and the center of the wind guide ring and the horizontal line ranges from 55° to 63°; and / or

[0014] The included angle θ2 between the second side edge of the energy dissipation fins along the circumference and the center of the wind guide ring and the horizontal line ranges from θ2> 90°.

[0015] In an embodiment, the volute further comprises a wavy noise reduction edge disposed on the inner side wall of the air guide ring.

[0016] In an embodiment, the noise reduction edge is irregularly wavy.

[0017] The utility model also proposes an indoor unit comprising the above volute.

[0018] In an embodiment, the indoor unit further comprises a heat exchanger disposed on the air inlet side of the air inlet, and the heat exchanger is disposed obliquely relative to the air inlet.

[0019] In an embodiment, the angle a between the thickness direction of the heat exchanger and the axial direction of the fan wheel ranges from 0° to 18°.

[0020] In an embodiment, the indoor unit further comprises a compressor and a sound insulation cover, the compressor is located laterally to the volute, and the sound insulation cover covers the compressor.

[0021] In an embodiment, the maximum width W1 of the air duct of the volute in the horizontal direction ranges from W1 < 300 mm; and / or

[0022] The width of the heat exchanger is W2, the maximum distance from the side plate of the heat exchanger close to the compressor to the axis of the fan wheel is W 12 , and the range of W 12 is 0.36W2 ≤ W 12 ≤ 0.42W2; and / or

[0023] The width W of the indoor unit ranges from W < 515 mm.

[0024] The utility model also proposes an air conditioner comprising the above indoor unit.

[0025] The technical scheme of the utility model adopts the energy dissipation airfoil disposed on the inner side wall of the air guide ring, and the energy dissipation airfoil is disposed close to the volute tongue, so that the energy dissipation airfoil can guide the fluid flow, thereby changing the flow path and speed distribution of the fluid, and further inhibiting the formation and development of vortex, that is, limiting the growth of nascent backflow vortex and weakening the vortex intensity; in particular, the backflow vortex appearing at the air inlet when the fan load is high is inhibited, thereby reducing the noise generated by the vortex flow cut by the fan wheel, eliminating the abnormal noise generated when the fan wheel rotates at high speed, reducing the noise during the operation of the whole machine, and significantly improving the sound quality of the product. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without any creative effort.

[0027] Figure 1 The first view cross-sectional structure schematic diagram of the indoor unit provided by the present application;

[0028] Figure 2 The second view cross-sectional structure schematic diagram of the indoor unit provided by the present application;

[0029] Figure 3 The explosion structure schematic diagram of the volute provided by the present application;

[0030] Figure 4 The first view structure schematic diagram of the volute body of the volute provided by the present application;

[0031] Figure 5 The second view structure schematic diagram of the volute body of the volute provided by the present application;

[0032] Figure 6 The third view structure schematic diagram of the volute body of the volute provided by the present application;

[0033] Figure 7 The Figure 6 The local enlarged view of A in the middle;

[0034] Figure 8 The noise test data of the volute provided by the present application and the volute provided by the prior art only with the air guide ring;

[0035] Figure 9 The data comparison diagram of the total noise sound pressure level of the volute provided by the present application and the volute provided by the prior art only with the air guide ring;

[0036] Figure 10 The power comparison diagram of the volute provided by the present application and the volute provided by the prior art only with the air guide ring.

[0037] Explanation of the reference signs:

[0038] 10, volute; 110, volute body; 111, air inlet; 112, volute tongue; 113, air outlet; 120, air guide ring; 130, energy dissipation wing piece; 140, noise reduction edge; 20, indoor unit; 210, air wheel; 220, heat exchanger; 230, sound insulation cover; 240, motor.

[0039] The purposes, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0041] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0042] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one feature. In addition, if "and / or" or "and / or" appears in the entire text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0043] At present, the volute on the market is prone to generate vortex near the volute tongue when the wind wheel runs, and if the internal flow state of the fan is not ideal, more boundary layer detachment will be formed, which will make the vortex larger, and further cause the noise of the volute to increase.

[0044] It can be understood that the air flow enters the impeller axially from the volute, and then changes into radial flow. The change of direction is particularly significant near the volute tongue, because the volute tongue is located near the outlet of the air flow, and the air flow needs to change direction here to adapt to the shape of the volute. Thus, the air flow will separate in the boundary layer near the blade outlet, and separate when the air flow expands in the volute, which will generate vortex near the volute tongue. These vortexes are formed because the air flow is hindered when changing direction, causing part of the air flow to separate from the main flow. Because the gap between the volute tongue and the blade is small, when the blade sweeps past the volute tongue, periodic pressure and velocity fluctuations are generated, thereby generating rotating noise. Especially when the fan is running at a large load, the backflow vortex occurring at the volute tongue continues to develop inside the gap between the impeller and the volute and the air inlet, thereby increasing the noise of the volute.

[0045] In order to reduce the noise of the volute, the utility model provides a volute 10.

[0046] Please refer to Figures 4 to 7 In an embodiment of the utility model, the volute 10 is used for an indoor unit 20, the indoor unit 20 is equipped with an impeller 210, the volute 10 includes volute body 110, air guide ring 120 and energy dissipation fin 130, volute body 110 is equipped with air inlet 111 and volute tongue 112, air guide ring 120 is located air inlet 111, energy dissipation fin 130 is located the inner side wall of air guide ring 120 and extends towards the radial direction of air guide ring 120, energy dissipation fin 130 is close to volute tongue 112.

[0047] The technical scheme of the utility model sets energy dissipation fin 130 on the inner side wall of air guide ring 120 and makes energy dissipation fin 130 close to volute tongue 112, so that energy dissipation fin 130 can guide fluid flow, thereby changing the flow path and speed distribution of fluid, and further inhibiting the formation and development of vortex, that is, limiting the growth of primary backflow vortex and weakening the intensity of vortex, especially inhibiting the backflow vortex appearing in air inlet 111 when the load of fan is higher, thereby reducing the noise generated by the impeller 210 cutting vortex, eliminating the abnormal noise generated when the impeller 210 rotates at high speed, reducing the noise when the whole machine operates, and significantly improving the sound quality of the product.

[0048] It should be noted that energy dissipation fin 130 is close to volute tongue 112, that is, energy dissipation fin 130 is installed near volute tongue 112, specifically, in the axial direction of air inlet, energy dissipation fin 130 at least partially covers volute tongue 112, that is, energy dissipation fin 130 covers at least part of the area of volute tongue 112 in the axial direction of air inlet 111, so that the air flow can be better guided to achieve better noise reduction effect.

[0049] Further, energy dissipation fin 130 is located on the side of air guide ring 120 close to air inlet 111.

[0050] Optionally in the present embodiment, the energy dissipation wing 130 is arranged in a fan ring shape, because the fan ring shaped energy dissipation wing 130 can better guide the fluid, so that the fluid enters the volute 10 more smoothly, reducing the sudden turning and speed change of the fluid near the volute tongue 112, thereby effectively suppressing the generation of vortex. Thus, by suppressing the vortex, the vibration and noise level of the fluid machine can be significantly reduced, and the reliability and service life of the equipment can be improved. Furthermore, the fan ring shaped energy dissipation wing 130 can also optimize the distribution of fluid in the volute 10, making the fluid flow to the outlet more uniformly, further improving the performance of the fluid machine. Of course, the present scheme is not limited thereto, and in other embodiments, the energy dissipation wing 130 can also be triangular or square.

[0051] Further, in an embodiment, the maximum outer radius of the wind wheel 210 is R, and the chord length L of the side of the energy dissipation wing 130 connected to the guide ring 120 ranges from 0.48R to 0.65R; if the chord length L is less than 0.48R, the flow guiding effect of the energy dissipation wing 130 will be poor, thereby reducing the noise reduction and flow regulation effect of the energy dissipation wing 130, and if the chord length L is greater than 0.65R, the energy dissipation wing 130 will excessively occupy the wind area of the inlet 111, thereby reducing the inlet air volume and causing performance degradation. The present scheme limits the range of the chord length L to 0.48R to 0.65R, thereby further improving the flow guiding effect of the energy dissipation wing 130 under the condition of reducing the wind area of the inlet 111 occupied by the energy dissipation wing 130, to further improve the noise reduction and flow regulation effect of the energy dissipation wing 130.

[0052] Further, in an embodiment, the maximum outer radius of the wind wheel 210 is R, and the width k of the energy dissipation wing 130 ranges from 0.08R to 0.12R; if the width k is less than 0.08R, the flow guiding effect of the energy dissipation wing 130 will be poor, thereby reducing the noise reduction and flow regulation effect of the energy dissipation wing 130, and if the width k is greater than 0.12R, the energy dissipation wing 130 will excessively occupy the wind area of the inlet 111, thereby reducing the inlet air volume and causing performance degradation. The present scheme limits the range of the width k to 0.08R to 0.12R, thereby further improving the flow guiding effect of the energy dissipation wing 130 under the condition of reducing the wind area of the inlet 111 occupied by the energy dissipation wing 130, to further improve the noise reduction and flow regulation effect of the energy dissipation wing 130.

[0053] Further, in an embodiment, the maximum outer radius of the wind wheel 210 is R, and the opening degree A of the volute body 110 ranges from 0.4R to 0.56R. Adjusting the opening degree of the volute body 110 within this range can ensure smoother fluid flow in the volute 10, reduce vortex and turbulence, and thus reduce energy loss and noise. Moreover, adjusting the opening degree of the volute body 110 within this range can also optimize the fluid flow path, which helps to improve the rotational speed and power output of the wind wheel 210, and thus improves the overall fluid efficiency. By limiting the opening degree A of the volute 10 to the range of 0.4R to 0.56R, the opening degree A of the volute 10 is more reasonable, which can reduce the pressure fluctuation and velocity variation of the fluid in the volute 10, and thus improves the stability of the fluid. This helps to reduce the vibration and noise of the device, and improves the reliability and service life of the device. Under different wind energy density conditions, by adjusting the opening degree of the volute 10, the wind wheel 210 can capture more wind energy and convert it into mechanical energy. This enables the device to operate efficiently under different environmental conditions, and improves energy utilization. Adjusting the opening degree of the volute 10 can affect the rotational speed of the wind wheel 210. By optimizing the opening degree of the volute 10, the wind wheel 210 can maintain optimal performance at different rotational speeds; this helps the device to maintain high efficiency and stability under different operating conditions. Therefore, the specific opening degree A of the volute body 110 can be set according to the actual application scenario.

[0054] In this embodiment, the thickness of the energy dissipation wing 130 is designed to be between 2.5 and 3.0 mm, and is equivalent to the wall thickness of the volute body 110.

[0055] Optionally, the installation angle γ of the volute tongue 112 ranges from 72° to 86°. Within this installation angle γ range, the volute tongue 112 can better guide the airflow, reducing turbulence and vortex within the volute 10, thereby improving the efficiency and performance of the fan. Optimized airflow flow helps to reduce energy consumption and improve the overall efficiency of the fan. The installation angle γ within this range also helps to reduce the rotational noise of the centrifugal fan. Moreover, the inclined volute tongue 112 allows the phase of the volute 10 outlet airflow to be staggered, which helps to reduce the impact and disturbance between the airflow and the volute tongue 112, thereby reducing aerodynamic noise. The installation angle γ within this range also helps to enhance the stability of the fan, reducing vibration and noise. This not only improves the service life of the fan, but also improves the reliability and safety of the equipment. The volute tongue 112 installation angle within this range has good universality and can adapt to various application scenarios and requirements. Whether it is an application that requires high air volume or low noise, a suitable volute tongue 112 installation angle can be found within this range to meet the requirements. However, it should be noted that the installation angle γ of the volute tongue 112 is not the larger the better or the smaller the better, but needs to be determined according to the specific application scenario and requirements. In actual application, other factors such as the shape, size, material of the volute 10 and the speed of the fan also need to be considered to ensure the overall performance and efficiency of the fan is optimal, so the specific installation angle γ of the volute tongue 112 can be set according to the actual application scenario.

[0056] Optionally, the air outlet 113 of the volute 10 is arranged upwardly, and the angle θ1 between the line connecting the circumferential first side edge of the energy dissipation wing 130 and the center of the air guide ring 120 and the horizontal line ranges from 55° to 63°, and the angle θ2 between the line connecting the circumferential second side edge of the energy dissipation wing 130 and the center of the air guide ring 120 and the horizontal line is greater than 90°, so that the energy dissipation wing 130 can cover the gap area between the volute tongues 112, thereby ensuring the stable flow regulation effect of the energy dissipation wing 130.

[0057] Optionally, in the present embodiment, the volute 10 further comprises a wave-shaped noise reduction edge 140 arranged on the inner side wall of the air guide ring 120. It can be understood that the noise reduction edge 140 cooperates with the energy dissipation wing 130 to weaken the strong dynamic and static interference effect between the airflow and the edge of the air guide ring 120 when the fan wheel 210 rotates at high speed, thereby reducing noise.

[0058] Reference Figures 8 to 10After the test verification, the noise sound pressure level of the centrifugal fan system with the same air volume is reduced by 0.8dBA to 1.0dBA, and the power is reduced by about 2.5% to 3% after the energy dissipation wing piece 130 and the wave-shaped noise reduction edge 140 are adopted. The test results show that the above scheme can effectively improve the noise and improve the performance of the air duct in the product proposed in the scheme. Further tests on the noise of the air conditioner whole machine product show that after adopting the scheme of the utility model, the peak value of the noise under the condition of large air volume (high, medium and low wind) is reduced by more than 6dBA, and the difference between the peak value and the total value of each gear is greater than 15dBA, which means that the product has excellent sound quality.

[0059] With reference to Figures 4 to 7 Further, in the embodiment, the noise reduction edge 140 is irregularly wavy, which can better guide the direction of airflow to further weaken the strong dynamic and static interference effect between the airflow and the edge of the air guide ring 120 when the fan wheel 210 rotates at high speed, thereby further reducing the noise. Of course, the scheme is not limited to this, and in other embodiments, the noise reduction edge 140 is regularly wavy.

[0060] It should be noted that the irregular wave shape means that the shapes and sizes of the wave crests of the noise reduction edge 140 are different and the arrangement of each shape has no regularity, for example, but not limited to, the shapes of the wave crests include at least two of triangle, arc and trapezoid, and the arrangement of each shape and size of the wave crest has no regularity. Similarly, the regular wave shape means that the shapes and sizes of the wave crests are the same or arranged regularly.

[0061] Further, the noise reduction edge 140 can be an incomplete ring or a complete ring.

[0062] Further, the energy dissipation wing piece 130 is integrally injection molded with the volute 10 and the air guide ring 120, which not only improves the production efficiency, but also improves the connection strength of the three. Of course, the scheme is not limited to this, and in other embodiments, the energy dissipation wing piece 130 and the volute 10 and the air guide ring 120 can also be welded.

[0063] With reference to Figures 1 to 4 The utility model also proposes an indoor unit 20, which comprises a volute 10. The specific structure of the volute 10 is referred to the above-mentioned embodiments. Since the indoor unit 20 adopts all the technical schemes of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical schemes of the above-mentioned embodiments, which will not be repeated here.

[0064] Optionally, the indoor unit 20 further comprises a heat exchanger 220, which is arranged on the air inlet side of the air inlet 111, and is arranged obliquely relative to the air inlet 111; that is, the heat exchange cavity can be arranged on the air inlet side of the air inlet 111 at a certain oblique angle and asymmetrically, so that it can better adapt to the asymmetric air inlet flow, thereby more fully utilizing the overall machine structure space, expanding the size of the heat exchanger 220, and improving the heat exchange effect. Of course, the present scheme is not limited thereto, and in other embodiments, the heat exchanger 220 can also be arranged parallelly relative to the air inlet 111.

[0065] The centrifugal fan with the above structure can stably control the leakage airflow between the fan wheel 210 and the air inlet 111 of the volute 10 caused by local pressure changes under the condition that the size of the volute 10 is partially reduced, thereby ensuring that the product has lower noise and greater air volume.

[0066] Moreover, the energy dissipation wing 130 arranged on the volute 10 can better adapt to the non-uniform air inlet field caused by the obliquely placed heat exchanger 220.

[0067] In the present embodiment, the heat exchanger 220 is configured as an evaporator, and the indoor unit further comprises a motor 240, which is arranged corresponding to the air inlet 111, and the fan wheel 210 is arranged on the fan.

[0068] Further, the angle α between the thickness direction of the heat exchanger 220 and the axial direction of the fan wheel 210 is in the range of 0°≤α≤18°. When the angle α is small (close to 0°), the flow path of the fluid in the heat exchanger 220 is more direct, reducing the resistance and pressure loss of the fluid, which is beneficial to improve the flow rate and flow of the fluid. At the same time, the smaller angle α also helps the fluid to form a more uniform distribution in the heat exchanger 220, improving the heat exchange efficiency. When the angle α is in the range of 0° to 18°, the space is fully utilized to increase the area of the heat exchanger 220, which can ensure the effective contact area between the fluid and the wall of the heat exchanger 220, thereby improving the heat transfer efficiency. In addition, due to the optimization of the fluid flow path, the residence time of the fluid in the heat exchanger 220 is more reasonable, which is conducive to the full exchange of heat. The optimized angle range helps to reduce the energy loss of the fluid in the heat exchanger 220, such as pressure loss and heat loss, thereby improving the energy efficiency of the entire system. When designing the heat exchanger 220, a reasonable angle range can ensure the structural stability of the heat exchanger 220, avoiding deformation or damage of the equipment due to changes in fluid pressure or temperature. Furthermore, by limiting the angle α to the range of 0° to 18°, the internal structure of the heat exchanger 220 is relatively simple, which is convenient for cleaning and maintenance. This helps to prolong the service life of the heat exchanger 220 and reduce maintenance costs.

[0069] Further, the indoor unit 20 further comprises a compressor and a sound insulation cover 230, the compressor is located at the lateral side of the volute 10, and the sound insulation cover 230 covers the compressor; it can be understood that the compressor is arranged in the indoor unit 20, so that the weight of the outdoor unit can be reduced, thereby facilitating the user to fix the outdoor unit, and the sound insulation cover 230 covers the compressor, so that the noise of the compressor is reduced. Of course, the present scheme is not limited to this, and the indoor unit 20 can also not comprise the compressor and the sound insulation cover 230, and the compressor is arranged in the outdoor unit of the air conditioner.

[0070] Optionally, the width of the heat exchanger 220 is W2, the maximum distance from the lateral plate of the compressor to the axis of the wind wheel 210 is W 12 , and the range of W 12 is 0.36W2≤W 12 ≤0.42W2; further, the width W of the indoor unit ranges from W<515mm; and the maximum width W1 of the air duct of the volute 10 in the horizontal direction ranges from W1<300mm. It can be understood that the heat exchanger 220 is arranged to be inclined relative to the air inlet 111, that is, the heat exchanger 220 is largely offset to the left side of the fan system as a whole. In this way, when the compressor is arranged in the indoor unit 20, the width of the volute 10 is greatly compressed, and the noise and air volume performance can still be good, and the sound quality is stable.

[0071] The design of the present application can maintain good noise performance under the condition that the total width W1 of the air duct is greatly compressed. In the present design, the total width of the air duct of the volute 10 is limited, and the opening degree A of the volute body 110 is limited to 0.4R to 0.56R, which is much smaller than the general recommended value. By using a smaller opening degree A of the volute body 110, the total width W1 of the air duct is controlled to be less than 300mm, thereby allowing the installation of a sound insulation cover 230 of a larger compressor under the condition that the width W of the indoor unit is less than 515mm.

[0072] For the present embodiment, the size of the sound insulation cover W3 is about 190mm.

[0073] The utility model further proposes a kind of air conditioner, and the air conditioner includes indoor unit 20, and the specific structure of the indoor unit 20 refers to above-mentioned embodiment, since the present air conditioner has adopted all technical solutions of above-mentioned all embodiments, at least has all beneficial effects brought by the technical scheme of above-mentioned embodiment, and here is not repeated.

[0074] Optionally, the air conditioner comprises an indoor unit 20 and an outdoor unit, the indoor unit 20 and the outdoor unit are connected through a refrigerant hose assembly, and the refrigerant hose assembly is pre-filled with refrigerant; it can be understood that the air conditioner is a split type air conditioner which is convenient for users to realize personal installation, the indoor side heat exchanger 220 of the indoor unit 20 and the outdoor side heat exchanger 220 of the outdoor unit are connected through the refrigerant hose assembly, and the refrigerant circuit is injected with refrigerant before the equipment is shipped. In this way, when the user installs the equipment by himself / herself, it is only necessary to fix the indoor unit 20 and the outdoor unit respectively, without the need to assemble the refrigerant pipe and inject the refrigerant, thereby reducing the installation difficulty and realizing personal installation of the user. However, the design is not limited thereto, and in other embodiments, the air conditioner of the utility model can also be a common split type air conditioner.

[0075] The refrigerant hose assembly can be a flexible refrigerant pipe and a sleeve pipe sleeved with the flexible refrigerant pipe, can comprise any two of the refrigerant pipe, the drain pipe and the power supply wire, and a sleeve pipe sleeved with the two, or comprise the refrigerant pipe, the drain pipe and the power supply wire and a sleeve pipe sleeved with the three, so as to facilitate connection.

[0076] The above is only an exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A scroll casing for use in a room unit, said room unit being provided with a fan wheel, characterized by The volute comprises: a volute body provided with an air inlet and a volute tongue; a wind guide ring provided at the air inlet; and a energy dissipation fin provided at an inner side wall of the wind guide ring and extending radially towards the wind guide ring, the energy dissipation fin being arranged close to the volute tongue.

2. The volute of claim 1, wherein The energy dissipation fin is arranged in a fan ring shape.

3. The volute of claim 2, wherein A chord length L of a side of the energy dissipation fin connected to the wind guide ring ranges from 0.48R to 0.65R, where R is a maximum outer radius of the wind wheel; and / or A width k of the energy dissipation fin ranges from 0.08R to 0.12R, where R is the maximum outer radius of the wind wheel; and / or An opening degree A of the volute body ranges from 0.4R to 0.56R, where R is the maximum outer radius of the wind wheel.

4. The volute of claim 1 wherein, An installation angle γ of the volute tongue ranges from 72° to 86°.

5. The volute of claim 1 wherein, A first side edge of the energy dissipation fin is arranged in a circumferential direction, and an angle θ1 between a line connecting the first side edge and a center of the wind guide ring and a horizontal line ranges from 55° to 63°; and / or A second side edge of the energy dissipation fin is arranged in a circumferential direction, and an angle θ2 between a line connecting the second side edge and the center of the wind guide ring and the horizontal line ranges from θ2>90°.

6. The volute of claim 1 wherein, The volute further comprises a wave-shaped noise reduction edge provided at the inner side wall of the wind guide ring.

7. The volute of claim 6 wherein, The noise reduction edge is arranged in an irregular wave shape.

8. An indoor unit, characterized by comprising: An indoor unit comprising the volute according to any one of claims 1 to 7.

9. The indoor unit of claim 8, wherein, The indoor unit further comprises a heat exchanger provided at an air inlet side of the air inlet, the heat exchanger being arranged obliquely relative to the air inlet.

10. The indoor unit of claim 9, wherein, An angle α between a thickness direction of the heat exchanger and an axial direction of the wind wheel ranges from 0° to 18°.

11. The indoor unit of claim 9, wherein, The indoor unit further comprises a compressor and a sound insulation cover, the compressor being arranged laterally to the volute, and the sound insulation cover covering the compressor.

12. The indoor unit of claim 11, wherein, A maximum width W1 of an air duct of the volute in a horizontal direction ranges from W1<300mm; and / or The width of the heat exchanger is W2, the maximum distance from the side plate of the compressor to the axis of the fan wheel is W 12 , and the range of W 12 is 0.36W2≤W 12 ≤0.42W2; and / or A width W of the indoor unit ranges from W<515mm.

13. An air conditioner characterized by comprising: An indoor unit comprising the indoor unit according to any one of claims 1 to 12.

Images