Air conditioner indoor unit and air conditioner

Abstract

The application discloses an air conditioner indoor unit and an air conditioner. The air conditioner indoor unit comprises a shell, a fan wheel and an indoor heat exchanger, the fan wheel and the indoor heat exchanger are arranged in the shell, and the fan wheel is arranged on the air outlet side of the indoor heat exchanger. The shell comprises a front volute tongue and a diffuser plate, the front volute tongue and the diffuser plate define an air outlet channel together with the fan wheel, a left-right swingable swing leaf is arranged in the air outlet channel, and a guide structure is arranged on the inner side of the swing leaf. The guide structure separates at least part of the air outlet channel into a first air channel adjacent to the diffuser plate and a second air channel adjacent to the front volute tongue. According to the air conditioner indoor unit, when the air volume is reduced or the resistance of the air inlet or the air outlet is too large, the eccentric vortex still stays near the front volute tongue, and the size of the eccentric vortex does not increase.

Description

Technical Field

[0001] This application relates to the field of household appliances, and in particular to an indoor air conditioning unit and an air conditioner. Background Technology

[0002] Due to its low noise and stable airflow, cross-flow fan impellers are increasingly used in air conditioning products. Due to its principle characteristics, the performance of the cross-flow fan impeller is greatly related to the eccentric vortex at the front volute tongue when the impeller is working. The closer the eccentric vortex is to the front volute tongue and the smaller its area, the more ideal the flow inside the impeller and the higher the fan efficiency.

[0003] However, due to the large air volume range of the fan, the design often uses the highest operating condition as the benchmark to meet the requirements of its ideal eccentric vortex. In actual operation, due to changes in inlet and outlet resistance, adjustments to the outlet guide vane, and other reasons, the fan may experience abnormal low air volume conditions. In these conditions, the eccentric vortex is too large, affecting the working efficiency of the fan. In addition, the irregular movement of the low air volume eccentric vortex inside the fan reduces the air volume and causes periodic surge, severe backflow at the outlet, and low air output efficiency. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide an air conditioning indoor unit in which, when the air volume is reduced or the resistance of the air inlet or outlet is too high, the eccentric vortex remains near the front volute tongue, and the size of the eccentric vortex does not increase.

[0005] An indoor air conditioning unit according to this application includes: a housing; a fan and an indoor heat exchanger, wherein the fan and the indoor heat exchanger are disposed within the housing, and the fan is disposed on the air outlet side of the indoor heat exchanger; wherein the housing includes: a front volute and a diffuser plate, the front volute and the diffuser plate and the fan define an exhaust duct, the exhaust duct is provided with left-right swinging blades and an air guide structure disposed inside the swinging blades, the air guide structure dividing at least a portion of the exhaust duct into a first air duct adjacent to the diffuser plate and a second air duct adjacent to the front volute.

[0006] According to the indoor unit of the air conditioner of this application, by setting an air guide structure in the exhaust duct, the exhaust duct can be divided into a first air duct and a second air duct. Thus, when the impeller guides the airflow into the exhaust duct, by setting the air guide structure in the exhaust duct near the exhaust port, the possibility of the airflow near the diffuser side flowing back to the impeller under pressure is reduced. Therefore, when the air volume is reduced or the resistance of the air inlet or exhaust port is too large, the eccentric vortex still stays near the front volute tongue, and the size of the eccentric vortex does not increase. Thus, compared with the prior art, the air volume is increased under the same operating conditions, and the noise is reduced, and the risks of surge and abnormal noise are reduced.

[0007] According to one embodiment of this application, the air guiding structure is configured as an air guiding plate, which extends along the air outlet direction.

[0008] According to one embodiment of this application, the outer diameter of the wind turbine is D, and the minimum distance between the wind guide plate and the outer circumferential surface of the wind turbine is δ, wherein δ satisfies: 5%D≤δ≤20%D.

[0009] According to one embodiment of this application, the front volute is provided with an arc-shaped segment that bends forward, and the angle between the perpendicular line from the center of the arc-shaped segment to the diffuser plate and the air guide plate is α, wherein α satisfies: 85°≤α≤95°.

[0010] According to one embodiment of this application, the air guide plate is at least partially parallel to the diffuser plate, and the distance between the air guide plate and the portion of the diffuser plate parallel to the air guide plate is h. The minimum distance between the front volute tongue and the diffuser plate is H, where h satisfies: 0.3H. <h<0.5H。

[0011] According to one embodiment of this application, the length of the wind guide plate in the wind guiding direction is L, and the outer diameter of the wind turbine is D, wherein L satisfies: L>0.3D.

[0012] According to one embodiment of this application, the air guide plate is constructed as a flat plate or an arc-shaped plate.

[0013] According to one embodiment of this application, the left and right ends of the air guide plate are fixedly connected to the left and right sides of the housing, respectively, and the oscillating blade is provided with a fitting gap that cooperates with the air guide plate.

[0014] According to one embodiment of this application, the air guiding structure is constructed as a plurality of sub-air guiding structures arranged sequentially in the air outlet direction or in the left-right direction, and two adjacent sub-air guiding structures can move relative to each other.

[0015] The air conditioner according to this application includes the aforementioned indoor air conditioner unit. Since the air conditioner according to this application is equipped with the aforementioned indoor air conditioner unit, during the operation of the air conditioner, regardless of whether the exhaust volume is large or small, the eccentric vortex of the indoor air conditioner unit remains near the front volute tongue, and the size of the eccentric vortex does not increase. Therefore, compared with the prior art, the air volume is increased under the same operating conditions, noise is reduced, and the risks of surge, abnormal noise, etc. are reduced.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of an indoor air conditioner unit according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of airflow in an indoor unit of an air conditioner according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the air guide plate and the swing blade in one direction according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the air guide plate and the swing blade in another direction according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of an indoor air conditioning unit according to another embodiment of this application.

[0023] Reference numerals: indoor unit of air conditioner 100, casing 110, chassis 111, front frame 112, diffuser plate 111a, front volute 112a, impeller 120, indoor heat exchanger 130, air guide plate 140, swivel blade 150, air inlet 101, air inlet duct 102, air outlet 103, air outlet 104, first air duct 104a, second air duct 104b. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] The following is for reference. Figures 1-5 This application describes an indoor air conditioning unit 100 according to an embodiment of the present application.

[0026] The indoor unit 100 of the air conditioner according to this application includes a housing 110, a fan 120, and an indoor heat exchanger 130.

[0027] The housing 110 may include a chassis 111 and a face frame 112 disposed on the chassis 111. The impeller 120 and the indoor heat exchanger 130 are disposed inside the housing 110. Specifically, the impeller 120 and the indoor heat exchanger 130 are disposed between the chassis 111 and the face frame 112. The chassis 111 and the face frame 112 define a receiving space for accommodating the impeller 120 and the indoor heat exchanger 130.

[0028] An air inlet 101 may be provided on the top of the frame 112. An air inlet duct 102 communicating with the air inlet 101 is defined between the frame 112, the chassis 111, and the indoor heat exchanger 130. A filter screen is provided on the air inlet side of the indoor heat exchanger 130. The impeller 120 is provided on the air outlet side of the indoor heat exchanger 130. A diffuser plate 111a is provided on the chassis 111, and a front volute 112a is provided on the frame 112. The diffuser plate 111a and the front volute 112a, together with the indoor heat exchanger 130, define an exhaust duct 104. At the same time, an exhaust port 103 is provided on the frame 112, and the exhaust port 103 communicates with the exhaust duct 104.

[0029] Indoor air enters the air inlet duct 102 through the air inlet 101, and after being filtered by the filter, it passes through the indoor heat exchanger 130 and exchanges heat with the refrigerant inside the indoor heat exchanger 130. After the heat exchange, the air is discharged from the indoor air conditioner through the exhaust duct 104 and the exhaust port 103.

[0030] An air guide strip is typically installed at the air outlet 103 of the air conditioner. The air guide strip can swing up and down to guide the air vertically. At the same time, inside the air guide strip, in the air duct 104, there is a swivel blade that can swing left and right to guide the exhaust air horizontally. Thus, different air outlet effects can be achieved.

[0031] However, in the existing technology, due to the large air volume range of the fan, the design often uses the highest operating condition as the benchmark to meet the requirements of its ideal eccentric vortex. In actual operation, due to changes in inlet and outlet resistance, adjustments to the outlet guide plate 140, etc., the impeller 120 may experience abnormal low air volume conditions. In these conditions, the eccentric vortex is too large, affecting the working efficiency of the impeller 120. In addition, the low air volume eccentric vortex moves irregularly inside the impeller 120, reducing the air volume and causing periodic surge, severe backflow at the outlet, and low air output efficiency.

[0032] In order to solve the above-mentioned technical problems, this application provides an air guiding structure in the exhaust duct 104, which is located inside the swing blade 150 (i.e. upstream of the swing blade 150 in the air outlet direction). The air guiding structure can divide at least a portion of the exhaust duct 104 into a first air duct 104a and a second air duct 104b. The first air duct 104a is adjacent to the diffuser plate 111a, and the second air duct 104b is adjacent to the front volute tongue 112a.

[0033] Therefore, as Figure 2As shown, when the impeller 120 guides the airflow into the exhaust duct 104, by setting a guide structure in the exhaust duct 104 near the exhaust port 103, the possibility of the airflow near the diffuser plate 111a flowing back to the impeller 120 under pressure is reduced. Thus, when the airflow is reduced or the resistance of the air inlet 101 or the exhaust port 103 is too high, the eccentric vortex remains near the front volute tongue 112a, and the size of the eccentric vortex does not increase. Therefore, compared with the prior art, the airflow is increased under the same operating conditions, the noise is reduced, and the risks of surge and abnormal noise are reduced.

[0034] According to the air conditioning indoor unit 100 of this application, by setting an air guide structure in the exhaust duct 104, the exhaust duct 104 can be divided into a first air duct 104a and a second air duct 104b. Thus, when the impeller 120 guides the airflow into the exhaust duct 104, by setting an air guide structure in the exhaust duct 104 near the exhaust port 103, the possibility of the airflow near the diffuser plate 111a flowing back to the impeller 120 under pressure is reduced. Therefore, when the air volume is reduced or the resistance of the air inlet 101 or the exhaust port 103 is too large, the eccentric vortex still stays near the front volute tongue 112a, and the size of the eccentric vortex does not increase. Thus, compared with the prior art, the air volume is increased under the same operating conditions, the noise is reduced, and the risk of surge and abnormal noise is reduced.

[0035] In some embodiments of this application, such as Figure 1-4 As shown, the air guiding structure can be constructed as an air guide plate 140, which can extend in the left and right directions and in the air outlet direction. Thus, the airflow in the exhaust duct 104 can be divided into two parts. The airflow near the diffuser plate 111a is less likely to flow back to the impeller 120 under pressure, while the eccentric vortex remains near the front volute tongue 112a, and the size of the eccentric vortex does not increase.

[0036] Furthermore, the air guide plate 140 can be a flat plate or an arc-shaped plate. When the air guide plate 140 is constructed as an arc-shaped plate, the bending direction of the air guide plate 140 can be consistent with the bending direction of the front volute 112a or the diffuser plate 111a. In the embodiments of this application, both the front volute 112a and the diffuser plate 111a are bent towards the front, so the air guide plate 140 is also bent towards the front, thereby dividing the exhaust duct 104 into two parts more evenly.

[0037] In some embodiments of this application, such as Figure 1As shown, the outer diameter of the impeller 120 can be D, and the minimum distance between the outer circumference of the impeller 120 and the air guide plate 140 can be δ, while δ satisfies: 5%D≤δ≤20%D. Through numerous experiments and research, the inventors of this application discovered that if δ is too small, abnormal noise is generated; if δ is too large, the air guiding effect is poor. Only when 5%D≤δ≤20%D can the abnormal noise level of the indoor unit 100 during operation be guaranteed to be low, while also ensuring the air guiding effect of the air guide plate 140, ensuring that the eccentric vortex remains near the front volute tongue 112a, and that the size of the eccentric vortex does not increase.

[0038] In some embodiments of this application, since the front volute tongue 112a bends towards the front, an arc-shaped segment naturally bends towards the front on the front volute tongue 112a. The arc-shaped segment is circular, and the angle between the circle and the perpendicular line between the diffuser plate 111a and the air guide plate 140 can be α, and α satisfies: 85°≤α≤95°.

[0039] Therefore, it can be ensured that the air guide plate 140 is approximately parallel to the diffuser plate 111a, or that a portion of the air guide plate 140 is approximately parallel to the diffuser plate 111a. When the air guide plate 140 is a flat plate, the air guide plate 140 can be approximately parallel to the flat portion of the diffuser plate 111a. When the air guide plate 140 is an arc-shaped plate, the air guide plate 140 can be approximately parallel to the arc-shaped portion of the diffuser plate 111a.

[0040] According to one embodiment of this application, at least a portion of the diffuser 111a is parallel to the air guide plate 140, the distance between the portion of the diffuser 111a parallel to the air guide plate 140 and the air guide plate 140 is h, and the minimum distance between the diffuser 111a and the front volute tongue 112a is H, then h satisfies: 0.3H <h<0.5H。

[0041] If the value of h is too large or too small, the air guiding effect will be poor. Setting the value of h within the range mentioned above can effectively ensure the air guiding effect, ensure that the eccentric vortex remains near the front volute tongue 112a, and at the same time, the size of the eccentric vortex does not increase.

[0042] In some embodiments of this application, the dimension of the air guide plate 140 along the air guiding direction is L, and the outer diameter of the impeller 120 is D, then L satisfies: L>0.3D. The inventors of this application discovered during their research that when the air guide plate 140 is too short, the airflow easily bypasses the air guide plate 140, failing to achieve the intended guiding effect. Most of the airflow near the diffuser plate 111a still flows back into the impeller 120, causing the eccentric vortex to move away from the front volute tongue 112a, and the eccentric vortex to increase in size.

[0043] According to one embodiment of this application, the left and right ends of the air guide plate 140 are fixedly connected to the left and right side walls of the housing 110, respectively. Meanwhile, the blades are provided with gaps that cooperate with the air guide plate 140. These gaps can avoid the air guide plate 140 and prevent the swing blades 150 from interfering with the air guide plate 140 during the swinging process, thus ensuring that the swing blades 150 can smoothly guide the air left and right.

[0044] In some embodiments of this application, the air guiding structure includes multiple sub-air guiding structures, and the multiple air guiding structures can be arranged sequentially in the air outlet direction or in the left and right directions, while two adjacent sub-air guiding structures can move relative to each other.

[0045] For example, the air guiding structure can be constructed as an air guiding plate 140, which can include multiple sub-air guiding plates. The multiple sub-air guiding plates can be arranged sequentially in the air outlet direction, and two adjacent sub-air guiding plates can swing relative to each other in the front-back direction or the up-down direction. The multiple sub-air guiding plates can be arranged sequentially in the left-right direction, and two adjacent sub-air guiding plates can swing relative to each other in the front-back direction, the left-right direction, or the up-down direction.

[0046] Therefore, the air guiding structure can achieve a variety of different operating conditions. By adjusting the movement of multiple sub-air guiding structures, more complex air guiding effects can be achieved, improving the operating mode of the air conditioning indoor unit 100.

[0047] Of course, it is understandable that the air guide structure can be constructed as a one-piece molded part, which simplifies the overall construction of the air guide structure and makes its manufacturing and production simpler.

[0048] In another embodiment of this application, such as Figure 5 As shown, the air guiding structure is similar to the structure of the front volute 112a. The air guiding structure includes two intersecting air guiding plate parts. The intersection of the two air guiding plate parts is constructed as an arc shape. One of the air guiding plate parts and the front volute 112a define a second air duct 104b, and the other air guiding plate part and the diffuser plate 111a define a first air duct 104a.

[0049] The following describes in detail a specific embodiment of the indoor unit of the air conditioner according to this application.

[0050] The indoor unit of the air conditioner according to this application includes a housing 110, a fan 120, and an indoor heat exchanger 130. The housing 110 may include a chassis 111 and a face frame 112 mounted on the chassis 111. An air inlet 101 may be provided on the top of the face frame 112. An air inlet duct 102 communicating with the air inlet 101 is defined between the face frame 112, the chassis 111, and the indoor heat exchanger 130. A filter screen is provided on the air inlet side of the indoor heat exchanger 130. The fan 120 is located on the air outlet side of the indoor heat exchanger 130. A diffuser plate 111a is provided on the chassis 111, and a front volute 112a is provided on the face frame 112. The diffuser plate 111a and the front volute 112a, together with the indoor heat exchanger 130, define an exhaust duct 104. An exhaust port 103 is provided on the face frame 112, and the exhaust port 103 communicates with the exhaust duct 104.

[0051] An air guide strip is typically installed at the air outlet 103 of the air conditioner. The air guide strip can swing up and down to guide airflow vertically. Meanwhile, inside the air guide strip, in the exhaust duct 104, there is a swivel blade 150 that can swing left and right to guide the exhaust air horizontally. Thus, different air outlet effects can be achieved.

[0052] The indoor unit 100 of the air conditioner of this application has an air guiding structure in the exhaust duct 104 and on the inner side of the swing blade 150 (i.e. upstream of the swing blade 150 in the air outlet direction). The air guiding structure can divide at least a portion of the exhaust duct 104 into a first air duct 104a and a second air duct 104b. The first air duct 104a is adjacent to the diffuser plate 111a, and the second air duct 104b is adjacent to the front volute tongue 112a.

[0053] Therefore, when the impeller 120 guides the airflow into the exhaust duct 104, by setting a guide structure in the exhaust duct 104 near the exhaust port 103, the possibility of the airflow near the diffuser plate 111a flowing back to the impeller 120 under pressure is reduced. Thus, when the airflow is reduced or the resistance of the air inlet 101 or the exhaust port 103 is too high, the eccentric vortex remains near the front volute tongue 112a, and the size of the eccentric vortex does not increase. Therefore, compared with the prior art, the airflow is increased under the same operating conditions, the noise is reduced, and the risks of surge and abnormal noise are reduced.

[0054] The air guiding structure can be constructed as an air guide plate 140, which can extend in the left-right direction and in the air outlet direction. This divides the airflow in the exhaust duct 104 into two parts. The airflow near the diffuser plate 111a is less likely to flow back towards the impeller 120 under pressure, and the eccentric vortex remains near the front volute 112a without increasing in size. The air guide plate 140 can be a flat plate or an arc-shaped plate. When the air guide plate 140 is constructed as an arc-shaped plate, its bending direction can be consistent with the bending direction of the front volute 112a or the diffuser plate 111a. In the embodiments of this application, both the front volute 112a and the diffuser plate 111a bend forward, therefore the air guide plate 140 also bends forward, thus dividing the exhaust duct 104 into two parts more evenly.

[0055] The air conditioner according to an embodiment of this application is briefly described below.

[0056] The air conditioner according to the embodiment of this application includes the above-mentioned indoor air conditioner unit 100. Since the air conditioner according to the embodiment of this application is provided with the above-mentioned indoor air conditioner unit 100, during the operation of the air conditioner, regardless of whether the exhaust volume is large or small, the eccentric vortex of the indoor air conditioner unit 100 remains near the front volute tongue 112a, and the size of the eccentric vortex does not increase. Therefore, compared with the prior art, the air volume is increased under the same operating conditions, the noise is reduced, and the risk of surge, abnormal noise, etc. is reduced.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: case; A fan impeller and an indoor heat exchanger are disposed within the housing, with the fan impeller disposed on the air outlet side of the indoor heat exchanger; in The housing includes: a front volute and a diffuser plate, the front volute and the diffuser plate and the impeller defining an exhaust duct, the exhaust duct is provided with a swing blade that can swing left and right and an air guide structure provided inside the swing blade, the air guide structure divides at least a portion of the exhaust duct into a first air duct adjacent to the diffuser plate and a second air duct adjacent to the front volute. The air guiding structure is constructed as an air guiding plate, which extends along the air outlet direction; The air guide plate is at least partially parallel to the diffuser plate; In the direction parallel to the diffuser, the projections of the air guide plate and the wind turbine on the diffuser overlap. The front volute is provided with an arc-shaped segment that bends forward. The angle between the perpendicular line from the center of the arc-shaped segment to the diffuser plate and the air guide plate is α, and α satisfies: 85°≤α≤95°.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The outer diameter of the wind turbine is D, and the minimum distance between the wind guide plate and the outer circumferential surface of the wind turbine is δ, wherein δ satisfies: 5%D≤δ≤20%D.

3. The indoor unit of the air conditioner according to claim 1, characterized in that, Furthermore, the distance between the air guide plate and the portion of the diffuser plate parallel to the air guide plate is h, and the minimum distance between the front volute tongue and the diffuser plate is H, wherein h satisfies: 0.3H <h<0.5H。 4. The indoor unit of the air conditioner according to claim 1, characterized in that, The length of the wind guide plate in the wind guiding direction is L, and the outer diameter of the wind turbine is D. The length of L satisfies: L>0.3D.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, The air guide plate is constructed as a flat plate or an arc plate.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, The left and right ends of the air guide plate are fixedly connected to the left and right sides of the housing, respectively, and the blades are provided with a fitting gap to cooperate with the air guide plate.

7. The indoor unit of the air conditioner according to claim 1, characterized in that, The air guiding structure is constructed as a plurality of sub-air guiding structures arranged sequentially in the air outlet direction or in the left and right directions, and two adjacent sub-air guiding structures can move relative to each other.

8. An air conditioner, characterized in that, The indoor unit of the air conditioner includes any one of claims 1-7.

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