Air supply device of air conditioner and vertical air conditioner having the same

Abstract

The present invention discloses an air supply device of an air conditioner and a vertical air conditioner having the same. The air supply device comprises: a volute; a volute cover, the volute cover cooperates with the volute to form an air duct cavity, the air duct cavity comprises an upper air duct cavity, a fan installation cavity and a lower air duct cavity connected in sequence; and a centrifugal fan arranged in the fan installation cavity, wherein: the distance between the center of the centrifugal fan and the outlet of the upper air duct cavity is a first preset distance A, the distance between the center of the centrifugal fan and the outlet of the lower air duct cavity is a second preset distance B, and the first preset distance A is less than the second preset distance B.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air supply device of an air conditioner and a vertical air conditioner having the same. Background Art

[0002] Existing cabinet air conditioners with dual air outlets often use multiple centrifugal fans, one fan to achieve upper air outlet and the other fan to achieve lower air outlet. This structural layout makes the whole machine larger. In order to solve this problem, a cabinet air conditioner with a single centrifugal fan to achieve upper and lower air outlet has emerged.

[0003] At present, the cabinet unit with a single centrifugal fan that can achieve upper and lower air outlet has a height of more than 1.8m, the evaporator is relatively high, and the centrifugal fan is located in the middle of the heat exchanger. The wind speed in the air inlet area near the fan is relatively high, which is prone to noise hazards. The wind speed in the air inlet area far away from the fan is relatively slow, which can easily cause uneven heat exchange of the evaporator and insufficient upper air outlet, affecting the cooling and heating effects of the air conditioner.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In view of this, the present invention discloses an air supply device of an air conditioner and a vertical air conditioner having the same, so as to at least solve the above-mentioned problem.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention discloses an air supply device for an air conditioner, the air supply device comprising:

[0008] snail shell;

[0009] A volute cover, wherein the volute cover cooperates with the volute to form an air duct cavity, wherein the air duct cavity comprises an upper air duct cavity, a fan installation cavity and a lower air duct cavity connected in sequence;

[0010] And a centrifugal fan arranged in the fan installation cavity, wherein: the distance between the center of the centrifugal fan and the outlet of the upper air duct cavity is a first preset distance A, the distance between the center of the centrifugal fan and the outlet of the lower air duct cavity is a second preset distance B, and the first preset distance A<the second preset distance B.

[0011] Further optionally, the proportional relationship between the first preset distance A and the second preset distance B satisfies:

[0012] Further optionally, the lower circumferential wall and the upper circumferential wall of the fan installation cavity both adopt logarithmic spiral line shapes, and the end of the logarithmic spiral line shape of the lower circumferential wall is connected to the outer wall surface of the upper air duct cavity to form a first air guide side wall; the end of the logarithmic spiral line shape of the upper circumferential wall is connected to the outer wall surface of the lower air duct cavity to form a second air guide side wall.

[0013] Further optionally, the outer wall surface of the upper air duct cavity and the inner wall surface of the upper air duct cavity are both curved toward the same side away from the rotation direction of the centrifugal fan, and the arc segment radius H of the outer wall surface of the upper air duct cavity and the arc segment radius I of the inner wall surface of the upper air duct cavity satisfy:

[0014] Further optionally, an upper volute tongue is provided at the lower end of the inner wall of the upper air duct cavity, and a first volute throat width formed between the upper volute tongue and the end of the logarithmic spiral line of the lower peripheral wall is G, and the air outlet width of the upper air duct cavity is F, wherein the air outlet width F and the volute throat width G satisfy: And / or, a lower volute tongue is provided at the upper end of the inner wall of the lower air duct cavity, a second volute throat width formed between the lower volute tongue and the end of the logarithmic spiral line of the upper wall is G1, and the air outlet width of the lower air duct cavity is F1, wherein the air outlet width F1 of the lower air duct cavity and the second volute throat width G1 satisfy: 1.4<F1 / G1<1.8.

[0015] Further optionally, the air supply device further includes a guide ring,

[0016] The guide ring is arranged at the air inlet formed by the fan installation cavity, and the distance E between the guide ring and the air inlet side of the centrifugal fan satisfies: 5mm≤E≤10mm.

[0017] Further optionally, the diameter D of the guide ring and the diameter C of the centrifugal fan satisfy: 15mm<CD<23mm.

[0018] Further optionally, the air supply device further includes:

[0019] a first damper assembly disposed in the lower air duct cavity, wherein the first damper assembly comprises: a first damper having the same curvature as the inner wall surface of the lower air duct cavity, and a first motor driving the first damper to open or close; and / or,

[0020] A second damper assembly is arranged in the upper air duct cavity, wherein the second damper assembly comprises: a second damper having the same curvature as the inner wall surface of the upper air duct cavity, and a second motor driving the second damper to open or close.

[0021] Further optionally, a first slide groove is formed on the volute side in the lower air duct cavity, a second slide groove corresponding to the first slide groove is formed on the volute cover side in the lower air duct cavity, and the first slide groove cooperates with the second slide groove to form a slideway of the first air door;

[0022] The first damper is rotatably arranged around its rotating end on the inner wall surface of the lower air duct cavity, and the free end of the first damper is slidably arranged in the slideway through a guide column.

[0023] A second aspect of the present invention discloses a vertical air conditioner, the air conditioner comprising any one of the above-mentioned air supply devices.

[0024] Beneficial effects: The present invention can reduce or avoid the generation of backflow vortices at the air inlet by improving the air supply device of the air conditioner, reduce air volume attenuation and noise; increase the air supply distance and improve comfort; after increasing the single upper air volume, the cold air rising effect of the air conditioner is further enhanced, the hot air falling effect is also improved, the air volume distribution is reasonable, and the comfort is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent by describing in detail its exemplary embodiments with reference to the accompanying drawings. The accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0026] Figure 1 An exploded view of an air duct of an air supply device according to an embodiment is shown;

[0027] Figure 2 A cross-sectional view of an air duct of an air supply device according to an embodiment is shown;

[0028] Figure 3 A front view of a volute of an air supply device according to an embodiment is shown;

[0029] Figure 4 A rear view of a volute cover of an air supply device according to an embodiment is shown;

[0030] Figure 5 A schematic diagram of an air duct cavity of an air supply device according to an embodiment is shown;

[0031] Figure 6 A schematic diagram comparing the profile of an air duct cavity of an embodiment with the profile of an existing air duct is shown. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0034] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0036] At present, the air inlet of the existing air conditioner is prone to generate backflow vortex, causing air volume attenuation and noise problems; the air outlet is prone to backflow and uneven air outlet problems; the air supply distance of the existing air conditioner is limited, resulting in poor comfort; the cold air of the existing air conditioner is difficult to rise, the hot air is difficult to fall, the air volume is insufficient, resulting in poor comfort; the air conditioner using dual centrifugal fans occupies a large space. The present invention optimizes the air supply device with a built-in centrifugal fan in the air conditioner, improves the extended streamline shape of the air duct wall, and adjusts the proportional relationship between the upper air outlet and the lower air outlet and the single centrifugal fan, so as to reduce the occupied space, and the air volume of the single upper air outlet can be guaranteed, the upper and lower air volumes can be reasonably distributed, the air supply effect is better, and the noise of the air supply device in the air conditioner can be reduced.

[0037] To further illustrate the technical solution of the present invention, Figure 1-Figure 6 As shown, the following specific embodiments are provided.

[0038] Example 1

[0039] In this embodiment, an air supply device of an air conditioner is provided, the air supply device comprising: a volute; a volute cover, the volute cover cooperates with the volute to form an air duct cavity, the air duct cavity comprises an upper air duct cavity, a fan installation cavity and a lower air duct cavity connected in sequence; and a centrifugal fan arranged in the fan installation cavity.

[0040] Specifically, Figure 1-Figure 5 As shown, the air supply device mainly includes a volute 1, a volute cover 2, a fan component 3, a transmission device 4, a damper 5, and a wire pressing plate 6. The volute is provided with an air inlet 7, an upper air duct cavity 8, a lower air duct cavity 9, an upper volute tongue 10, a lower volute tongue 11, a guide ring 12, and a first slide groove 13. The damper component assembly process is that the damper is assembled at the position of the arc groove of the lower air duct of the volute, the volute cover and the volute are buckled to form an air duct cavity, the fan component enters the air duct cavity through the circular opening 14 of the volute cover, and the motor pressing plate in the fan component and the corresponding structure on the volute cover are positioned and assembled.

[0041] like Figure 2 As shown, the outlet of the upper air duct cavity is designed as the upper air outlet of the volute and is inclined downward, with an oblique angle of 30°≤α≤40°, and the outlet of the lower air duct cavity is designed as the lower air outlet and is inclined upward, with an oblique angle of 40°≤β≤45°. The oblique angle design can increase the air supply distance of the air conditioner.

[0042] As shown in the following table:

[0043]

[0044] It can be seen from the above table that the upper air outlet and the lower air outlet are designed with an oblique outlet, where the upper air outlet is inclined downward in the horizontal direction. After the airflow comes out through the upper air outlet oblique outlet, the air supply range can be increased compared with the straight air outlet. The upper air outlet angle is designed to be α. When 30°≤α≤40°, based on the general air supply distance of the existing straight air outlet, it can be seen that the air supply distance can be increased by 1.91m compared with the straight air outlet; the lower air outlet is inclined upward in the horizontal direction, and the inclination angle is β. When 40°≤β≤45°, after the airflow comes out through the lower air outlet oblique outlet, the air supply distance can be increased by 1.62m compared with the straight air outlet.

[0045] In some optional modes, the distance between the center of the centrifugal fan and the outlet of the upper air duct cavity is a first preset distance A, the distance between the center of the centrifugal fan and the outlet of the lower air duct cavity is a second preset distance B, and the first preset distance A is less than the second preset distance B. Preferably, the proportional relationship between the first preset distance A and the second preset distance B satisfies: It should be noted that in order to ensure comfort, the air conditioner only has upper air outlet during cooling. The shorter the air duct, the smaller the energy loss. At the same time, the ratio is determined by combining the temperature rise rate in the upper and lower air outlet rooms of the air conditioner during heating.

[0046] Specifically, since the center of the centrifugal fan is preferably arranged to correspond to the air inlet formed on the fan installation cavity, the center of the air inlet is at the same height as the center of the centrifugal fan. Therefore, the distance between the center of the air inlet and the upper air outlet is also A, and the distance between the center of the air inlet and the lower air outlet is also B. When the condition is satisfied, When the air conditioner is running in cooling mode, a single upper air outlet mode can be used. In the single upper air outlet mode, the upper air duct cavity outlet is used as the air outlet of the air conditioner, and its air volume can reach more than 60% of the total air volume of the upper and lower air outlets at the same time. Taking the N speed under the same fan speed as an example, N is a positive integer, and the data corresponding to different ratios are shown in the following table:

[0047]

[0048] From this, it can be seen that after optimizing the lengths of the upper and lower air duct cavities, the air supply device of the air conditioner in this embodiment can make the air volume of the single upper air outlet reach more than 60% of the total air volume of the upper and lower air outlets at the same time, meeting the air volume of the single upper air outlet when the air conditioner is cooling, thereby improving the cooling comfort.

[0049] In some optional modes, the lower peripheral wall 21 and the upper peripheral wall 18 of the fan installation cavity are both logarithmic spiral lines, and the end of the logarithmic spiral line of the lower peripheral wall 21 is connected to the outer wall 20 of the upper air duct cavity to form a first air guide side wall; the end of the logarithmic spiral line of the upper peripheral wall 18 is connected to the outer wall 19 of the lower air duct cavity to form a second air guide side wall. The air duct line is designed with a logarithmic spiral line, and the outlet diffusion angle can be increased by designing the volute and the volute cover to rotate inward, so that the air volume of the whole machine is increased by more than 11%, and the internal turbulent kinetic energy is improved.

[0050] Specifically, Figure 3 , Figure 6 As shown, the volute air duct profile adopts a logarithmic spiral design, the upper air duct cavity and the lower air duct cavity are designed to rotate inward, the outer wall surface of the upper air duct cavity and the inner wall surface of the upper air duct cavity are bent toward the same side away from the rotation direction of the centrifugal fan, and the arc segment radius H of the outer wall surface of the upper air duct cavity and the arc segment radius I of the inner wall surface of the upper air duct cavity meet:

[0051] Preferably, an upper volute tongue is provided at the lower end of the inner wall of the upper air duct cavity, and the width of the first volute throat formed between the upper volute tongue and the end of the logarithmic spiral line of the lower peripheral wall is G, and the width of the air outlet of the upper air duct cavity is F, wherein the air outlet width F and the volute throat width G satisfy: And / or, a lower volute tongue is provided at the upper end of the inner wall of the lower air duct cavity, and the width of the second volute throat formed between the lower volute tongue and the end of the logarithmic spiral line of the upper wall is G1, and the air outlet width of the lower air duct cavity is F1, wherein the air outlet width F1 of the lower air duct cavity and the second volute throat width G1 satisfy: 1.4<F1 / G1<1.8.

[0052] This embodiment optimizes the air duct profile, and compared with the prior art air duct designed with straight segments, the outlet diffusion angle can be increased, the whole air volume is increased by more than 11%, and the internal turbulent kinetic energy is improved. The details are shown in the following table:

[0053]

[0054] In some optional ways, the air supply device also includes a guide ring. The guide ring is arranged at the air inlet formed by the fan installation cavity, and the distance E between the guide ring and the air inlet side of the centrifugal fan satisfies: 5mm≤E≤10mm. The diameter D of the guide ring and the diameter C of the centrifugal fan satisfy: 15mm<CD<23mm. This design method can increase the air intake of the air duct, improve the internal flow of the fan blade, and increase the flow velocity near the volute tongue.

[0055] In some optional embodiments, the air supply device also includes: a first damper assembly arranged in the lower air duct cavity, wherein the first damper assembly includes: a first damper having the same curvature as the inner wall surface of the lower air duct cavity, and a first motor driving the first damper to open or close; and / or, a second damper assembly arranged in the upper air duct cavity, wherein the second damper assembly includes: a second damper having the same curvature as the inner wall surface of the upper air duct cavity, and a second motor driving the second damper to open or close.

[0056] like Figure 1 , Figure 3 , Figure 4 As shown, in order to achieve better coordination between the damper assembly and the upper air duct cavity and / or the lower air duct cavity, the first damper assembly is fixed in the lower air duct cavity as an example. A first slide groove is formed on the volute side in the lower air duct cavity, and a second slide groove 17 corresponding to the first slide groove is formed on the volute cover side in the lower air duct cavity. The first slide groove and the second slide groove cooperate to form a slideway of the first damper. The first damper is rotatably arranged on the inner wall surface of the lower air duct cavity around its rotating end, and the free end of the first damper is slidably arranged in the slideway through a guide column.

[0057] like Figure 1As shown, a first damper is designed in the lower air duct cavity, and a first guide column 15 and a second guide column 16 are designed on the first damper, wherein the first guide column 15 is assembled in the second slide groove 17 formed on the volute cover, and the second guide column 16 is assembled in the first slide groove 13 of the lower air duct of the volute, and the first slide groove 13 and the second slide groove 17 are both designed with arc grooves imitating the motion trajectory of the damper. Under the action of airflow, the damper can maintain the stability of movement in the arc groove through the upper guide column and the lower guide column, and the arc groove can limit the damper when it moves to the extreme position. When the air conditioner is discharging air on the cooling unit, the damper moves from the initial position along the guide groove, and when it moves to the end of the arc guide groove, the damper is limited. During the movement of the damper, the effect of the outlet airflow needs to be overcome, and the slide can limit the damper along the outlet direction, ensuring the stability and reliability of the damper during the movement.

[0058] In this embodiment, the air supply device of the air conditioner forms an air duct cavity through the cooperation of the volute and the volute cover. The air duct cavity is divided into an upper air duct cavity, a fan installation cavity and a lower air duct cavity. The air outlets of the upper and lower air duct cavities are designed with oblique openings, which increases the air supply distance and improves the air outlet effect.

[0059] A fan installation cavity is designed on the volute to form an air inlet. The air inlet is designed with a streamlined guide structure, which can increase the air intake and reduce the vortex formed by the wind discharged from the fan blowing to the upper and lower air duct cavities. A damper is designed in the lower air duct cavity. The damper is controlled by a transmission device to achieve the closure of the lower air duct cavity. When the air conditioner is cooling, the damper is closed, and the cold air flow can only flow out through the upper air duct cavity, solving the problem that the cold air cannot rise in the existing air conditioner. When heating, the damper is opened, and the hot air flows out through the upper and lower air duct cavities, solving the problem that the hot air cannot fall to the ground in the existing air conditioner. At the same time, the hot air discharged from the upper and lower cavities solves the problem of slow indoor temperature rise.

[0060] Example 2

[0061] In this embodiment, an air conditioner is provided, which is a vertical air conditioner and is provided with an upper air outlet and a lower air outlet of the air conditioner. The upper air outlet of the air conditioner corresponds to the air outlet of the upper air duct cavity, and the lower air outlet of the air conditioner corresponds to the air outlet of the lower air duct cavity.

[0062] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included in the spirit and scope of the appended claims.

Claims

1. An air supply device for an air conditioner, characterized in that: The air supply device comprises: snail shell; A volute cover, wherein the volute cover cooperates with the volute to form an air duct cavity, wherein the air duct cavity comprises an upper air duct cavity, a fan installation cavity and a lower air duct cavity connected in sequence; and a centrifugal fan arranged in the fan installation cavity, wherein: the distance between the center of the centrifugal fan and the outlet of the upper air duct cavity is a first preset distance A, the distance between the center of the centrifugal fan and the outlet of the lower air duct cavity is a second preset distance B, and the first preset distance A is less than the second preset distance B; The lower peripheral wall and the upper peripheral wall of the fan installation cavity are both logarithmic spiral line shapes; The end of the logarithmic spiral line of the lower peripheral wall is connected to the outer wall surface of the upper air duct cavity to form a first air guide side wall; the end of the logarithmic spiral line of the upper peripheral wall is connected to the outer wall surface of the lower air duct cavity to form a second air guide side wall; The outer wall surface of the upper air duct cavity and the inner wall surface of the upper air duct cavity are both curved toward the same side away from the rotation direction of the centrifugal fan, and the arc segment radius H of the outer wall surface of the upper air duct cavity and the arc segment radius I of the inner wall surface of the upper air duct cavity satisfy: An upper volute tongue is provided at the lower end of the inner wall of the upper air duct cavity, and the width of the first volute throat formed between the upper volute tongue and the end of the logarithmic spiral line of the lower peripheral wall is G, and the width of the air outlet of the upper air duct cavity is F, wherein the air outlet width F and the volute throat width G satisfy: and, A lower volute tongue is provided at the upper end of the inner wall of the lower air duct cavity, and the second volute throat width formed between the lower volute tongue and the end of the logarithmic spiral line of the upper wall is G1, and the air outlet width of the lower air duct cavity is F1, wherein the air outlet width F1 of the lower air duct cavity and the second volute throat width G1 satisfy: 1.4<F1 / G1<1.

8.

2. The air supply device according to claim 1, characterized in that: The proportional relationship between the first preset distance A and the second preset distance B satisfies:

3. The air supply device according to claim 1, characterized in that: The air supply device also includes a guide ring, The guide ring is arranged at the air inlet formed by the fan installation cavity, and the distance E between the guide ring and the air inlet side of the centrifugal fan satisfies: 5mm≤E≤10mm.

4. The air supply device according to claim 3, characterized in that: The diameter D of the guide ring and the diameter C of the centrifugal fan satisfy: 15mm<CD<23mm.

5. The air supply device according to claim 1, characterized in that: The air supply device also includes: a first damper assembly disposed in the lower air duct cavity, wherein the first damper assembly comprises: a first damper having the same curvature as the inner wall surface of the lower air duct cavity, and a first motor driving the first damper to open or close; and / or, A second damper assembly is arranged in the upper air duct cavity, wherein the second damper assembly comprises: a second damper having the same curvature as the inner wall surface of the upper air duct cavity, and a second motor driving the second damper to open or close.

6. The air supply device according to claim 5, characterized in that: A first slide groove is formed on the volute side in the lower air duct cavity, and a second slide groove corresponding to the first slide groove is formed on the volute cover side in the lower air duct cavity, and the first slide groove cooperates with the second slide groove to form a slideway of the first air door; The first damper is rotatably arranged around its rotating end on the inner wall surface of the lower air duct cavity, and the free end of the first damper is slidably arranged in the slideway through a guide column.

7. A vertical air conditioner, characterized in that: The vertical air conditioner comprises the air supply device according to any one of claims 1 to 6, and the vertical air conditioner is provided with an upper air outlet and a lower air outlet of the air conditioner, the upper air outlet of the air conditioner corresponds to the air outlet of the upper air duct cavity, and the lower air outlet of the air conditioner corresponds to the air outlet of the lower air duct cavity.

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