Air conditioner

Abstract

The invention provides an air conditioner (100). The air conditioner (100) comprises an indoor unit (2) and an outdoor unit (1). The indoor unit (2) comprises an indoor heat exchanger. The outdoor unit (1) comprises a compressor, an outdoor heat exchanger, a machine shell (10), an outdoor fan (20), an air outlet grille (30) and an air guide part (40). The machine shell (10) comprises an installation opening (101) and a containing cavity (102), and the installation opening (101) is communicated with the outside and the containing cavity (102). The outdoor fan (20) is arranged in the containing cavity (102) and is opposite to the mounting opening (101). The air outlet grille (30) is arranged at the installation opening (101) and connected with the machine shell (10). The air guide part (40) is arranged in the accommodating cavity (102) and is positioned at the mounting opening (101); the air guide part (40) is connected with the machine shell (10) and extends in the circumferential direction of the installation opening (101). Wherein the minimum radial dimension of the air guide part (40) is defined as D1, the minimum radial dimension of the air outlet grille (30) is defined as D2, and the minimum radial dimension D1 of the air guide part (40) and the minimum radial dimension D2 of the air outlet grille (30) meet the condition that (D2-D1) / D1 is larger than or equal to 0 and smaller than or equal to 0.25, so that obstruction of the air guide part (40) to airflow is reduced.

Description

air conditioner

[0001] This application claims priority to Chinese patent application No. 202211228549.7 filed on October 9, 2022, and priority to Chinese patent application No. 202310730929.9 filed on June 19, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0003] An air conditioner primarily consists of an outdoor unit and an indoor unit. The outdoor unit's air outlet is equipped with an air grille to prevent external debris from entering the unit and affecting its normal operation. It also prevents the user's hands from coming into contact with the fan inside the outdoor unit, potentially causing safety accidents. Furthermore, the airflow generated by the fan in the outdoor unit must pass through the air grille to reach the outside. As a key component of the outdoor unit, the air grille plays a crucial role in its operation.

[0004] Summary of the Invention

[0005] An air conditioner is provided, comprising an indoor unit and an outdoor unit. The indoor unit comprises an indoor heat exchanger. The outdoor unit comprises a compressor, an outdoor heat exchanger, a casing, an outdoor fan, an air outlet grille, and an air guide. The casing comprises an installation opening and a accommodating cavity, wherein the installation opening connects the outside to the accommodating cavity. The outdoor fan is disposed in the accommodating cavity and is opposite to the installation opening. The air outlet grille is disposed at the installation opening and is connected to the casing. The air guide is disposed in the accommodating cavity and is located at the installation opening; the air guide is connected to the casing and extends circumferentially around the installation opening. The minimum radial dimension of the air guide is defined as D1, and the minimum radial dimension of the air outlet grille is defined as D2. The minimum radial dimension D1 of the air guide and the minimum radial dimension D2 of the air outlet grille satisfy the following relationship: 0≤(D2-D1) / D1≤0.25, so as to reduce the obstruction of the air flow by the air guide. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG1 is a structural diagram of an air conditioner according to some embodiments;

[0007] FIG2 is a structural diagram of an outdoor unit according to some embodiments;

[0008] FIG3 is a partial structural diagram of an outdoor unit according to some embodiments;

[0009] FIG4 is a structural diagram of another outdoor unit according to some embodiments;

[0010] FIG5 is a partial structural diagram of another outdoor unit according to some embodiments;

[0011] FIG6 is a partial structural diagram of another outdoor unit according to some embodiments;

[0012] FIG7 is a partial structural diagram of another outdoor unit according to some embodiments;

[0013] FIG8 is a diagram showing the relationship between the value of (D2-D1) / D1 and the air volume in an outdoor unit according to some embodiments;

[0014] FIG9 is a structural diagram of an air outlet grille according to some embodiments;

[0015] FIG10 is a structural diagram of another air outlet grille according to some embodiments;

[0016] FIG11 is a structural diagram of another air outlet grille according to some embodiments;

[0017] FIG12 is a partial structural diagram of another outdoor unit according to some embodiments;

[0018] FIG13 is a partial enlarged view of circle S in FIG12 ;

[0019] FIG14 is a partial enlarged view of circle Z in FIG12;

[0020] FIG15 is a partial structural diagram of another outdoor unit according to some embodiments;

[0021] FIG16 is a simulated diagram of pressure distribution at an outdoor unit outlet according to some embodiments;

[0022] FIG17 is another simulated diagram of pressure distribution at an outdoor unit outlet according to some embodiments;

[0023] FIG18 is a partial structural diagram of an air outlet grille according to some embodiments;

[0024] FIG19 is a simulation effect diagram of the resistance of an air outlet grille to airflow according to some embodiments;

[0025] FIG20 is a simulation effect diagram of another air outlet grille's resistance to airflow according to some embodiments;

[0026] FIG21 is a simulation effect diagram of the resistance of an air outlet grille to airflow according to some embodiments;

[0027] FIG22 is a simulation effect diagram of the resistance of an air outlet grille to airflow according to some embodiments;

[0028] FIG23 is a partial structural diagram of another outdoor unit according to some embodiments;

[0029] FIG24 is a partial enlarged view of circle M in FIG23;

[0030] FIG25 is a partial structural diagram of another air outlet grille according to some embodiments;

[0031] FIG26 is a simulation effect diagram of the resistance of an air outlet grille to airflow according to some embodiments;

[0032] FIG27 is a simulation effect diagram of the resistance of an air outlet grille to airflow according to some embodiments;

[0033] FIG28 is a partial structural diagram of yet another outdoor unit according to some embodiments. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0035] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0036] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0037] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0038] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0039] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0040] As shown in FIG. 1 , in some embodiments, an air conditioner 100 includes an outdoor unit 1 and an indoor unit 2 .

[0041] In some embodiments, the air conditioner 100 further includes an expansion valve configured to adjust a flow rate of refrigerant in a pipeline of the air conditioner 100 .

[0042] In some embodiments, the indoor unit 2 includes an indoor heat exchanger and an indoor fan, and the outdoor unit 1 includes an outdoor heat exchanger and a compressor.

[0043] The refrigerant cycle of the air conditioner 100 is performed by a compressor, a condenser (an indoor heat exchanger or an outdoor heat exchanger), an expansion valve (an indoor expansion valve and an outdoor expansion valve), and an evaporator (an outdoor heat exchanger or an indoor heat exchanger). The refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and circulates the refrigerant to the conditioned side.

[0044] When the air conditioner 100 is operating in heating mode, the low-temperature, low-pressure gas-phase refrigerant is compressed by the compressor into a high-temperature, high-pressure gas-phase refrigerant, which then flows into the indoor heat exchanger. The indoor heat exchanger condenses the high-temperature, high-pressure gas-phase refrigerant into a high-pressure liquid-phase refrigerant. Heat is released into the surrounding environment during the condensation process, thereby increasing the temperature of the indoor air. The expansion valve throttles and reduces the pressure of the high-pressure liquid-phase refrigerant, converting it into a low-pressure gas-liquid two-phase refrigerant. The outdoor heat exchanger evaporates the low-pressure gas-liquid two-phase refrigerant to form a low-temperature, low-pressure gas-phase refrigerant, which then returns to the compressor, completing the heating cycle.

[0045] When the air conditioner 100 is operating in cooling mode, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor flows into the outdoor heat exchanger. The outdoor heat exchanger condenses the high-temperature, high-pressure gaseous refrigerant into a medium-temperature, high-pressure, subcooled liquid refrigerant. The expansion valve throttles and reduces the pressure of the medium-temperature, high-pressure, subcooled liquid refrigerant into a low-temperature, low-pressure, two-phase gas-liquid refrigerant. The indoor heat exchanger evaporates the low-temperature, low-pressure gas-liquid refrigerant to form a low-temperature, low-pressure gaseous refrigerant. During the evaporation process, the refrigerant absorbs heat from the surrounding environment, lowering the indoor air temperature. The low-temperature, low-pressure gaseous refrigerant returns to the compressor, completing the refrigeration cycle.

[0046] In some embodiments, during operation of the air conditioner 100, the outdoor unit 1 includes an air outlet grille and an air guide, with the air guide cooperating with the air outlet grille at the outdoor unit's air outlet. The outdoor unit 1 outputs the heat-exchanged air, forming an airflow, to the outdoor environment through the air outlet grille. The air outlet grille prevents foreign matter from entering the outdoor unit 1 and potentially affecting its normal operation. The air outlet grille also prevents direct contact between the user and the outdoor fan of the outdoor unit 1, improving the safety of the outdoor unit 1.

[0047] However, the air outlet grille will produce resistance to the airflow blown out of the outdoor unit 1, resulting in a loss of air volume of the outdoor unit 1 and affecting the overall performance of the outdoor unit 1. In addition, the fitting between the air outlet grille and the air guide part will also produce resistance to the airflow blown out of the outdoor unit 1.

[0048] In the related art, in the design and production of outdoor units, the method of optimizing the inclination angle, shape and spacing between the bars of the air outlet grille and the spacing between the bars is usually adopted to reduce the resistance of the air outlet grille to the air flow blown out by the outdoor fan of the outdoor unit. For example, in order to reduce production costs, the air outlet grille of the outdoor unit in the related art is usually made of plastic material. However, it is subject to the requirements of mold processing and installation specifications. For example, the height, length and other parameters of the bars of the air outlet grille made of plastic will be limited. It is difficult to design the bar structure of the air outlet grille completely according to the air outlet direction of the outdoor fan, resulting in the air outlet grille still having a large resistance to the air flow blown out by the fan. In order to meet the demand for the air volume blown out by the outdoor unit, it is necessary to increase the speed of the outdoor fan, which will increase the power of the outdoor fan and increase the operating cost of the outdoor unit.

[0049] To address the above issues, some embodiments of the present disclosure provide an air conditioner 100, comprising an outdoor unit 1. The outdoor unit 1 includes an air guide and an air outlet grille. In some embodiments of the present disclosure, the minimum radial dimension of the air guide is defined as D1, and the minimum radial dimension of the air outlet grille is defined as D2, such that D1 and D2 satisfy the following relationship: 0 ≤ (D2 - D1) / D1 ≤ 0.25. This reduces the air flow obstruction caused by the air guide.

[0050] As shown in FIG2 , the outdoor unit 1 includes a housing 10. In some embodiments of the present disclosure, the housing 10 includes an installation opening 101 and a receiving cavity 102. The installation opening 101 is provided on the housing 10, and the receiving cavity 102 is defined by the housing 10. The receiving cavity 102 can communicate with the outside of the housing 10 through the installation opening 101.

[0051] The outdoor unit 1 also includes an outdoor fan 20, which is disposed within the accommodating chamber 102 and is positioned corresponding to the mounting opening 101. In some embodiments of the present disclosure, the outdoor fan 20 includes a motor 202 and at least one fan blade 201. The at least one fan blade 201 is connected to the motor 202 and is spaced apart along the axial direction of the motor 202. The motor 202 is connected to the housing 10 and is configured to drive the at least one fan blade 201 to rotate. In some embodiments of the present disclosure, the at least one fan blade 201 is positioned corresponding to the mounting opening 101.

[0052] The outdoor unit 1 further includes an air outlet grille 30 , which is disposed at the mounting opening 101 and configured to cover the mounting opening 101 . When the air outlet grille 30 covers the mounting opening 101 , the air outlet grille 30 is connected to the casing 10 .

[0053] The outdoor unit 1 further includes an air guide portion 40 , which is disposed in the accommodating cavity 102 and located at the mounting opening 101 . The air guide portion 40 is connected to the casing 10 and extends along the circumference of the mounting opening 101 .

[0054] It is understandable that outdoor air is composed of a large number of particles (such as various gas molecules, dust, etc.), and a large number of particles are suspended in the air. In the absence of external force, a large number of particles are moving freely in the air.

[0055] As shown in Figure 3, in some embodiments of the present disclosure, when the outdoor fan 20 is running, at least one fan blade 201 rotates along the axis of the motor 202 and hits particles in the air. The hit particles are transformed from free motion to rapid movement along a preset direction, thereby generating airflow.

[0056] The air in front of at least one fan blade 201 (for example, the direction O in Figure 3) is continuously blown away and blown out of the outdoor unit 1 after passing through the air guide part 40 and the air outlet grille 30, thereby forming a low-pressure area in front of at least one fan blade 201. At this time, a pressure difference is formed between the front of at least one fan blade 201 and the rear thereof (for example, the direction N in Figure 3). Under the action of the pressure difference, the air behind at least one fan blade 201 will flow toward its front.

[0057] Since at least one fan blade 201 continues to rotate, at least one fan blade 201 will send away the air in front of it again, and the air behind at least one fan blade 201 will flow to the front of it again, and so on, forming a continuous airflow.

[0058] At least one fan blade 201 includes an impeller surface. In some embodiments of the present disclosure, the initial direction of the airflow generated by the operation of the outdoor fan 20 is perpendicular to the plane where the impeller surface of the at least one fan blade 201 is located.

[0059] It should be noted that the front of at least one fan blade 201 is the side thereof facing the air outlet grille 30 , and the rear of at least one fan blade 201 is the side thereof facing away from the air outlet grille 30 .

[0060] As shown in FIG3 , in some embodiments of the present disclosure, the air outlet grille 30 includes at least one bar 301 and a fixing portion 302. The fixing portion 302 extends along the circumference of the air outlet grille 30 and is connected to the housing 10. The fixing portion 302 is configured to support and fix the air outlet grille 30. The at least one bar 301 is disposed within and connected to the fixing portion 302.

[0061] In some embodiments of the present disclosure, after the airflow flows out of the air guide portion 40, it is divided into a first part of the airflow and a second part of the airflow. The first part of the airflow, such as the airflow in part A in FIG3 , is blown onto the air outlet grille 30. When the air outlet grille 30 includes a plurality of bars 301, the first part of the airflow is blown out of the outdoor unit 1 from the gap between any two of the plurality of bars 301 of the air outlet grille 30. The second part of the airflow, such as the airflow in part B in FIG3 , is blown onto at least one bar 301 and the edge of the air outlet grille. Since the second part of the airflow is subject to resistance from at least one bar 301 and the edge of the air outlet grille 30, the air volume blown out of the outdoor unit 1 is lost and reduced.

[0062] As shown in Figures 4 and 5 , in some embodiments of the present disclosure, the minimum radial dimension of the air guide 40 is defined as D1, and the minimum radial dimension of the air outlet grille 30 is defined as D2. D1 and D2 satisfy the following: 0 ≤ (D2 - D1) / D1 ≤ 0.25. Thus, the minimum radial dimension D2 of the air outlet grille 30 is greater than the minimum radial dimension D1 of the air guide 40. This allows the airflow generated by the fan 20 to reach the air outlet grille 30 under the guidance of the air guide 40, and the airflow is not obstructed by the air guide 40 or the housing 10 before reaching the air outlet grille 30.

[0063] It should be noted that, as shown in Figure 6, when D1 and D2 satisfy: (D2-D1) / D1<0, the minimum radial dimension D2 of the air outlet grille 30 is smaller than the minimum radial dimension D1 of the air guide portion 40, and the air outlet grille 30 is connected to the mounting port 101. The minimum radial dimension of the mounting port 101 can be regarded as the minimum radial dimension D2 of the air outlet grille 30. At this time, the minimum radial dimension D2 of the mounting port 101 is smaller than the minimum radial dimension D1 of the air guide portion 40. After the airflow generated by the outdoor fan 20 flows out of the air guide portion 40, a third part of the airflow is formed (such as the airflow of part C in Figure 6). The third part of the airflow is blown onto the casing 10. Since the casing 10 is a closed plate, the third part of the airflow cannot be blown out through the casing 10, which increases the resistance to the airflow and the loss of air volume, resulting in a decrease in the air output of the indoor unit 1.

[0064] As shown in FIG7 , when D1 and D2 satisfy the condition (D2-D1) / D1>0.25, the minimum radial dimension D2 of the air outlet grille 30 is greater than the minimum radial dimension D1 of the air guide portion 40. As the minimum radial dimension D2 of the air outlet grille 30 increases relative to the minimum radial dimension D1 of the air guide portion 40, the amount of air blown out from the gap between any two of the at least one bar 301 of the air outlet grille 30 no longer increases. In other words, the amount of air blown to the edge of the air outlet grille 30 no longer decreases, resulting in no significant effect on reducing the resistance to the airflow from the air outlet grille 30. Furthermore, further increasing the minimum radial dimension D2 of the air outlet grille 30 relative to the minimum radial dimension D1 of the air guide portion 40 at this point increases the production cost of the air outlet grille 30 and reduces the strength of the air outlet grille 30. As shown in Figure 8, in some embodiments of the present disclosure, when D1 and D2 satisfy: 0.05≤(D2-D1) / D1≤0.15, the exponential increase in the amount of airflow blown by the outdoor fan 20 onto at least one bar 301 of the air outlet grille 30 increases, so that the airflow generated by the outdoor fan 20 is guided by the air guide part 40 to blow onto the air outlet grille 30, and the effect of reducing the resistance of the air outlet grille 30 is more obvious. Under the premise of controlling production costs and ensuring the self-strength of the air outlet grille 30, the resistance generated by the air outlet grille 30 to the airflow blown out by the outdoor fan 20 can be further reduced.

[0065] In some embodiments of the present disclosure, the minimum radial dimension D2 of the air outlet grille 30 is increased, while the minimum radial dimension D1 of the air guide portion 40 remains unchanged. Thus, the minimum radial dimension D2 of the air outlet grille 30 is increased relative to the minimum radial dimension D1 of the air guide portion 40. This allows the airflow guided by the air guide portion 40 to cover the same area as the air outlet grille 30, while the area of ​​the air outlet grille 30 is increased. This allows a portion of the second portion of airflow that originally reached the edge of the air outlet grille 30 (such as the airflow in portion B in FIG. 3 ) to instead reach at least one slat 301 of the air outlet grille 30 (such as the airflow in portion B in FIG. 5 ) and exit the outdoor unit 1 through the gap between any two slats 301 of the at least one slat 301 of the air outlet grille 30. This reduces the resistance of the second portion of airflow to the air outlet grille 30, thereby reducing the resistance of the air outlet grille 30 to the airflow from the fan 20.

[0066] In other embodiments of the present disclosure, the minimum radial dimension D2 of the air outlet grille 30 remains unchanged, while the minimum radial dimension D1 of the air guide portion 40 is reduced. In this way, the minimum radial dimension D2 of the air outlet grille 30 increases relative to the minimum radial dimension D1 of the air guide portion 40. This reduces the coverage area of ​​the airflow directed onto the air outlet grille 30 by the air guide portion 40, while the area of ​​the air outlet grille 30 remains unchanged. This allows a portion of the second portion of the airflow that originally reached the edge of the air outlet grille 30 to instead reach at least one bar 301 of the air outlet grille 30 and exit the outdoor unit 1 through the gap between any two of the at least one bar 301 of the air outlet grille 30. This reduces the resistance of the second portion of the airflow to the air outlet grille 30, thereby reducing the resistance of the air outlet grille 30 to the airflow from the outdoor fan 20.

[0067] In some further embodiments of the present disclosure, the minimum radial dimension D2 of the air outlet grille 30 is increased, while the minimum radial dimension D1 of the air guide portion 40 is decreased. Thus, the minimum radial dimension D2 of the air outlet grille 30 increases relative to the minimum radial dimension D1 of the air guide portion 40. This reduces the coverage area of ​​the airflow directed by the air guide portion 40 onto the air outlet grille 30, while increasing the area of ​​the air outlet grille 30. This allows a portion of the second portion of airflow that originally reached the edge of the air outlet grille 30 to instead reach at least one slat 301 of the air outlet grille 30 and exit the outdoor unit 1 through the gaps between any two of the at least one slat 301 of the air outlet grille 30. This reduces the resistance of the second portion of airflow to the air outlet grille 30, thereby reducing the resistance of the air outlet grille 30 to the airflow from the outdoor fan 20. As shown in Figures 9 to 11, in some embodiments of the present disclosure, the air outlet grille 30 further includes a support portion 303. The support portion 303 is coaxially disposed with the air outlet grille 30 and is configured to support the at least one slat 301.

[0068] As shown in FIG9 , in some embodiments of the present disclosure, at least one bar 301A of the air outlet grille 30A includes at least one first bar 3011A and at least one second bar 3012A. One end of the at least one first bar 3011A is connected to the support portion 303A, and the other end extends radially along the air outlet grille 30A, or extends at a predetermined angle to the radial direction of the air outlet grille 30A, and is connected to the fixing portion 302A of the air outlet grille 30A. The at least one first bar 3011A has the same length in the radial direction of the air outlet grille 30A. The at least one second bar 3012A is spaced apart around the axis of the air outlet grille 30A. When the at least one bar 301A includes a plurality of second bars 3012A, the plurality of second bars 3012A are spaced apart along the radial direction of the air outlet grille 30A. The at least one first bar 3011A is connected to each second bar 3012A.

[0069] At this time, the minimum radial dimension D2 of the air outlet grille 30A is the radial dimension of the air outlet grille 30A.

[0070] As shown in FIG10 , in some other embodiments of the present disclosure, at least one bar 301B of the air outlet grille 30B includes at least one first bar 3011B and at least one second bar 3012B. One end of the at least one first bar 3011B is connected to the support portion 303B, and the other end extends toward the fixing portion 302B and is connected to the fixing portion 302B. The at least one first bar 3011B protrudes along the circumference of the air outlet grille 30B (such as the X direction in FIG10 ). At least one second bar 3012B is arranged around the center of the air outlet grille 30B. When the at least one bar 301B includes multiple second bars 3012B, the multiple second bars 3012B are distributed at intervals along the radial direction of the air outlet grille 30B. At least one first bar 3011B is connected to each second bar 3012B.

[0071] Different from the air outlet grille 30A in Figure 9, the air outlet grille 30B includes a short axis and a long axis, wherein the short axis is the axis with the shortest radial dimension of the air outlet grille 30B, and the long axis is the axis with the longest radial dimension of the air outlet grille 30B.

[0072] At this time, the minor axis dimension of the air outlet grille 30B is defined as D2, the major axis dimension is defined as D4, and the minimum radial dimension of the air outlet grille 30 is the minor axis dimension D2.

[0073] As shown in Figure 11, in some other embodiments of the present disclosure, at least one bar 301C of an air outlet grille 30C includes at least one first bar 3011C and at least one second bar 3012C. The at least one first bar 3011C is connected to a support portion 303C. When the at least one first bar 3011C includes a plurality of first bars 3011C, two of the plurality of first bars 3011C are connected to the fixing portion 302C to form a closed area, and the at least one second bar 3012C is disposed within the closed area. At least one second grid bar 3012C includes a first sub-grid bar 30121 and a second sub-grid bar 30122. One end of the first sub-grid bar 30121 is connected to the fixing portion 302C, and the other end is connected to one of the two adjacent first grid bars 3011C. One end of the second sub-grid bar 30122 is connected to the fixing portion 302C, and the other end is connected to the other of the two adjacent first grid bars 3011C. The first sub-grid bar 30121 and the second sub-grid bar 30122 are cross-connected.

[0074] In some embodiments of the present disclosure, the first sub-bar 30121 includes a first connecting portion 30121E and a second connecting portion 30121F, the first connecting portion 30121E is a straight line segment, and the first sub-bar 30121 is connected to the fixed portion 302C through the first connecting portion 30121E; the second connecting portion 30121F is an arc, and the first sub-bar 30121 is connected to the first bar 3011C through the second connecting portion 30121F.

[0075] At this time, the minimum radial dimension D2 of the air outlet grille 30C is the radial dimension of the air outlet grille 30C.

[0076] It should be noted that, in some embodiments of the present disclosure, the minimum radial dimension D2 of the air outlet grille 30 satisfies: 400 mm ≤ D2 ≤ 800 mm.

[0077] In some embodiments of the present disclosure, as shown in Figures 12 and 13, the dimension of the second bar 3012 in the axial direction of the fixing portion 302 is defined as a first dimension H1, and the dimension of the first bar 3011 in the axial direction of the fixing portion 302 is defined as a second dimension H2. The first dimension H1 satisfies: H1 ≥ 6 mm. In this way, the demolding requirements of the air outlet grille 30 can be guaranteed.

[0078] In some embodiments of the present disclosure, the first dimension H1 further satisfies the following: 0.011≤H1 / D2≤0.014; and the second dimension H2 satisfies the following: 0.011≤H2 / D2≤0.014. Thus, when the size of the air outlet grille 30 is determined, the axial lengths of the second bars 3012 and the first bars 3011 in the fixing portion 302 are reduced, thereby reducing the length of the path through which the airflow passes through the gaps between the multiple bars 301 of the air outlet grille 30, thereby reducing the resistance encountered by the airflow while passing through the air outlet grille 30. This, in turn, reduces the resistance generated by the air outlet grille 30 to the airflow blown out by the outdoor fan 20 of the outdoor unit 1, thereby reducing the operating power of the outdoor fan 20 and the operating cost of the outdoor unit 1.

[0079] In some embodiments of the present disclosure, the second dimension H2 and the first dimension H1 satisfy the following relationship: H2 < H1, and the end of the first bar 3011 away from the outdoor fan 20 is connected to the side of the second bar 3012 on the end away from the outdoor fan 20 that is close to the outdoor fan 20. The end of the first bar 3011 close to the outdoor fan 20 is connected to the side of the second bar 3012 on the end close to the outdoor fan 20 that is away from the outdoor fan 20. For example, when the second dimension H2 is 0.4 mm smaller than the first dimension H1, the distance between the end surface of the first bar 3011 away from the outdoor fan 20 and the end surface of the second bar 3012 away from the outdoor fan 20 is 0.2 mm, and the distance between the end surface of the first bar 3011 close to the outdoor fan 2 and the end surface of the second bar 3012 close to the fan 2 is 0.2 mm. In this way, the connection between the first grid bar 3011 and the second grid bar 3012 can be made tighter, thereby increasing the structural strength of the air outlet grille 30 .

[0080] As shown in FIG5 , the motor 202 drives at least one fan blade 201 to rotate. The diameter of the largest circular ring formed by the rotation of the fan 20 axis at the point farthest from the axis of the outdoor fan 20 on the at least one fan blade 201 is defined as D3. Wherein, D3 and D1 satisfy: 0.02≤(D1-D3) / D3≤0.1, and D1-D3≥12mm. In this way, the diameter D3 of the largest circular ring formed by the rotation of at least one fan blade 201 can be made smaller than the minimum radial dimension D1 of the air guide portion 40, so as to meet the assembly requirements of at least one fan blade 201, so that at least one fan blade 201 can be installed in the air guide portion 40 and will not collide with the air guide portion 40 during operation. In addition, the airflow generated by at least one fan blade 201 will not be too dispersed, so that the airflow generated by the fan 20 will not collide too much with the air guide portion 40, the housing 10, and the air outlet grille 30, thereby reducing the resistance to the airflow and the loss of air volume.

[0081] When D3 and D1 satisfy (D1-D3) / D3<0.02, at least one fan blade 201 cannot be installed in the air guide portion 40, so that the assembly requirement of at least one fan blade 201 cannot be met.

[0082] When D3 and D1 satisfy (D1-D3) / D3>0.1, the diameter D3 of the largest circular ring formed by the rotation of at least one fan blade 201 is smaller than the minimum radial dimension D1 of the air guide portion 40. In this way, the airflow generated by at least one fan blade 201 will be too dispersed, causing the airflow generated by at least one fan blade 201 to collide excessively with the air guide portion 40, the casing 10 and the air outlet grille 30, thereby increasing the resistance to the airflow and the loss of air volume.

[0083] In some embodiments of the present disclosure, as shown in FIG. 5 , the dimension of the fixing portion 302 in the axial direction of the mounting opening 101 is L1, where L1 satisfies: 5 mm ≤ L1 ≤ 60 mm.

[0084] It should be noted that when L1 is less than 5 mm, the axial dimension of the fixing portion 302 is too small, which increases the production difficulty of the fixing portion 302 and reduces the strength of the fixing portion 302 , making the fixing portion 302 easily damaged during use of the indoor unit 1 .

[0085] When L1>60 mm, the distance between the air outlet grille 30 and the fan 20 is too large, causing the airflow blowing onto the air outlet grille 30 to be too dispersed, resulting in increased resistance to the airflow and increased air volume loss.

[0086] In some embodiments of the present disclosure, as shown in Figures 5 and 15, the air guide portion 40 includes a first sub-air guide portion 401 and a second sub-air guide portion 402. The first sub-air guide portion 401 and the second sub-air guide portion 402 are connected, with the first sub-air guide portion 401 connected to the housing 10, and the second sub-air guide portion 402 being disposed on a side of the first sub-air guide portion 401 away from the housing 10. The radial dimension of the first sub-air guide portion 401 gradually decreases in the direction toward the second sub-air guide portion 402.

[0087] The first sub-air guide portion 401 of the air guide portion 40 guides the airflow blown out by the fan 20, so that the airflow can be blown toward the air outlet grille 30, reducing the collision between the airflow and the air guide portion 40, further reducing the resistance to the airflow, and increasing the air volume of the outdoor unit 1.

[0088] In some embodiments of the present disclosure, as shown in Figure 5, the axial dimension of the first sub-air guide portion 401 at the mounting opening 101 is defined as L2, and L2 satisfies: 0<L2≤20mm. At this time, the airflow blown out by the outdoor fan 20 can be blown along the first sub-air guide portion 401 toward the air outlet grille 30, and the airflow will not be too dispersed after being guided by the first sub-air guide portion 401, resulting in an increase in the air volume blown toward the fixed portion 302 of the air outlet grille 30, thereby increasing the resistance to the airflow and the loss of air volume.

[0089] It should be noted that when L2>20mm, the first sub-air guide portion 401 will cause the airflow blown out by the outdoor fan 20 to be too dispersed after being guided by the first sub-air guide portion 401, resulting in an increase in the air volume blown toward the fixed portion 302 of the air outlet grille 30, thereby increasing the resistance to the airflow and the loss of air volume.

[0090] As shown in Figure 15, the first sub-air guide portion 401 of the air guide portion 40 includes an inner circumferential surface 4011. The inner circumferential surface 4011 is the circumferential surface of the first sub-air guide portion 401 facing the mounting opening 101. The angle between the normal of the inner circumferential surface 4011 and the axis of the mounting opening 101 is defined as α, where α satisfies the following: 75°≤α<90°. α is, for example, 75°, 80°, 85°, or 90°. In this way, the first sub-air guide portion 401 can direct the airflow from the outdoor fan 20 along the inner circumferential surface 4011 toward the air outlet grille 30, reducing collisions between the airflow and the air guide portion 40, further reducing resistance to the airflow, and increasing the air volume of the outdoor unit 1. It should be noted that the axis of the mounting opening 101 can be parallel to the axis of the mounting opening 101.

[0091] It should be noted that when α is less than 75°, the airflow blown out by the outdoor fan 20 will be too dispersed after being guided by the inner circumferential surface 4011 of the first sub-air guide portion 401, resulting in an increase in the air volume blown toward the fixed portion 302 of the air outlet grille 30, thereby increasing the resistance to the airflow and the loss of air volume.

[0092] When α=90°, the inner circumferential surface 4011 of the first sub-air guide portion 401 will extend on the central axis of the installation port 101 in the direction away from the accommodating cavity 102, losing the function of guiding the diffusion of the airflow, causing the airflow to blow onto the air guide portion 40 and collide with the air guide portion 40, thereby increasing the resistance of the air guide portion 40, thereby increasing the loss of air volume of the outdoor unit 1.

[0093] When α>90°, the radial dimension of the first sub-air guide portion 401 gradually increases in the direction toward the second sub-air guide portion 402, and the inner circumferential surface 4011 of the first sub-air guide portion 401 causes the airflow blown out by the fan 20 to be concentrated toward the central axis of the mounting port 101, resulting in the inner circumferential surface 4011 of the first sub-air guide portion 401 blocking the airflow blown out by the fan 20, thereby increasing the resistance to the airflow and the loss of air volume.

[0094] In some embodiments of the present disclosure, the minimum radial dimension of the second sub-air guiding portion 402 is the minimum radial dimension D1 of the air guiding portion 40 .

[0095] It is understood that the minimum radial dimension D2 of the air outlet grille 30 is the radial dimension of the smallest radius of the circle formed by rotating the points on the fixed portion 302 of the air outlet grille 30 around the center of the air outlet grille 30. The minimum radial dimension D1 of the air guide portion 40 corresponding to the air outlet grille 30 is the radial dimension of the smallest radius of the circle formed by rotating the points on its edge around the center of the air guide portion 40.

[0096] As shown in FIG16 , when the size relationship between the air guide portion 40 and the air outlet grille 30 is not improved, the pressure on the fixed portion 302 of the air outlet grille 30 (such as position D in FIG16 ) is, for example, 5 Pa. At this time, the air outlet grille 30 has a large resistance to the airflow.

[0097] As shown in Figure 17, after the size relationship between the air guide part 40 and the air outlet grille 30 is improved, a part of the second part of the air flow originally blown to the fixed part 302 of the air outlet grille 30 can be blown to at least one bar 301 of the air outlet grille 30, and blown out of the outdoor unit 1 through the gap between any two bars 301 of at least one bar 301 of the air outlet grille 30. The pressure at the fixed part 302 of the air outlet grille 30 (such as the position D in Figure 17) is close to 0Pa. In this way, the pressure at the fixed part 302 of the air outlet grille 30 is reduced, so that the resistance of the air outlet grille 30 to a part of the air flow of the second part of the air flow is reduced, thereby solving the problem of the high resistance of the air outlet grille 30 to the air flow blown out by the fan 20.

[0098] As shown in FIG18 , the angle between the extension directions of two adjacent first bars 3011 among the plurality of first bars 3011 is defined as β, where β satisfies the following: 7°≤β<11°, and β is, for example, 7°, 8°, 9°, 10°, or 11°. In this way, the first bars 3011 can support at least one second bar 3012, ensuring that at least one second bar 3012 is not easily deformed in its radial direction. While meeting the requirements of mold processing and installation specifications, the number of first bars 3011 included in the air outlet grille 30 is reduced, thereby reducing the resistance of the first bars 3011 to the airflow blown out by the outdoor fan 20.

[0099] It should be noted that the angle β between the extension directions of two adjacent first bars 3011 among the multiple first bars 3011 may be equal or unequal. In some embodiments of the present disclosure, the angle β between the extension directions of two adjacent first bars 3011 among the multiple first bars 3011 is equal, that is, the multiple first bars 3011 are arranged at equal intervals along the circumference of the fixed portion 302.

[0100] As shown in FIG18 , in some embodiments of the present disclosure, the at least one first rib 3011 includes at least one first rib 30111 and at least one second rib 30112. The at least one first rib 30111 and the at least one second rib 30112 are sequentially spaced apart in the circumferential direction of the fixing portion 302. The at least one first rib 30111 and the at least one second rib 30112 extend radially along the fixing portion 302, and the length of the at least one first rib 30111 is greater than the length of the at least one second rib 30112.

[0101] One end of at least one first rib 30111 and at least one second rib 30112 is connected to the fixing portion 302 , the other end of at least one first rib 30111 is connected to the supporting portion 303 , and at least one first rib 30111 is cross-connected to multiple second bars 3012 .

[0102] In this way, the problem that the diameter of at least one second bar 3012 near the support part 303 is small, and when at least one first bar 301 is connected to all the second bars 3012, the gap between two adjacent first bars 301 near the support part 303 is small, thereby causing greater resistance to the airflow blown out by the outdoor fan 20 can be solved.

[0103] In some embodiments of the present disclosure, the distance from the axis of the fixing portion 302 to the end of the second rib 30112 away from the fixing portion 302 is defined as a first distance L3, and the first distance L3 satisfies: 0.55≤2L3 / D2≤0.7.

[0104] It should be noted that the ratio of the first distance L3 to the radius of the fixing portion 302 (ie, half of the minimum radial dimension D2 of the air outlet grille 30 ) may increase as the minimum radial dimension D2 of the air outlet grille 30 increases.

[0105] When the minimum radial dimension D2 of the air outlet grille 30 is determined, the range of the first distance L3 is determined by the above conditions. The length range of the second rib 30112 is also determined by the minimum radial dimension D2 of the air outlet grille 30A and the range of the first distance L3. This reduces the length of the second rib 30112 and meets mold processing and installation specifications. Furthermore, by reducing the length of the second rib 30112, the resistance to airflow from the second rib 30112 in the air outlet grille 30 can be further reduced, thereby further reducing the resistance of the air outlet grille 30 to the airflow blown by the fan 20.

[0106] In some embodiments of the present disclosure, as shown in FIG. 18 , the plurality of second grating bars 3012 further include a first circumferential rib 30123 , a second circumferential rib 30124 and a third circumferential rib 30125 .

[0107] Among the plurality of second ribs 3012 between the fixing portion 302 and the supporting portion 303, one second rib 3012 near the fixing portion 302 is a first circumferential rib 30123, which is connected to each first rib 3011. Among the plurality of second ribs 3012 between the end of the second rib 30112 away from the fixing portion 302 and the axis of the air outlet grille 30, one second rib 3012 near the fixing portion 302 is a second circumferential rib 30124. A third circumferential rib 30125 is connected to the end of the second rib 30112 away from the fixing portion 302, and the third circumferential rib 30125 and the second circumferential rib 30124 are adjacent to each other and spaced apart in the radial direction of the air outlet grille 30.

[0108] The radial distance between any two adjacent second bars 3012 in the plurality of second bars 3012 in the air outlet grille 30 is the same as the radial distance between a second bar 3012 in the plurality of second bars 3012 close to the fixing portion 302 and the fixing portion 302 in the air outlet grille 30 .

[0109] In this way, the position of each second grid bar 3012 can be determined by determining at least one of the positional relationship between the first circumferential rib 30123 and the fixing portion 302 or the positional relationship between the second circumferential rib 30124 and the fixing portion 302 .

[0110] In some embodiments of the present disclosure, as shown in Figure 18, the first circumferential rib 30123 includes a first arc segment 30123Q, which is the arc of the first circumferential rib 30123 located between two adjacent first bars 3011, for example, located between the adjacent first rib 30111 and the second rib 30112.

[0111] The arc length of the first arc segment 30123Q is defined as R1, and the arc length R1 satisfies: 0.15≤2R1 / D2≤0.2. It should be noted that the ratio of the arc length R1 to the radius of the outlet fixing portion 302 can increase as the minimum radial dimension D2 of the air outlet grille 30 increases.

[0112] When the minimum radial dimension D2 of the air outlet grille 30 is determined, the range of the arc length R1 of the first arc segment 30123Q is determined by the above conditions. At this time, since the angle β between the extension directions of two adjacent first bars 3011 has been determined, the radius of the first arc segment 30123Q can be determined, that is, the radius of the first circumferential rib 30123 can be determined, thereby determining the distance between the first circumferential rib 30123 and the fixed portion 302, and then determining the distance between any two adjacent second bars 3012.

[0113] In other embodiments of the present disclosure, as shown in FIG. 18 , the second circumferential rib 30124 includes a second arc segment 30124Q. The second arc segment 30124Q is an arc of the second circumferential rib 30124 located between two adjacent first ribs 30111 .

[0114] The arc length of the second arc segment 30124Q is defined as R2, and the arc length R2 satisfies: 0.15≤2R2 / D2≤0.2. It should be noted that the ratio of the arc length R2 to the radius of the fixing portion 302 can increase as the minimum radial dimension D2 of the air outlet grille 30 increases.

[0115] Therefore, when the minimum radial dimension D2 of the air outlet grille 30 is determined, the range of the arc length R2 of the second arc segment 30124Q is determined by the above conditions. At this time, since the angle β between the extension directions of the two adjacent first bars 3011 has been determined, that is, the angle 2β between the two adjacent first ribs 30111 can also be determined, so that the radius of the second arc segment 30124Q can be determined, that is, the radius of the second circumferential rib 30124 can be determined. When the length of the second rib 30112 is determined, the radius of the third circumferential rib 30125 can be determined, so that the spacing between the second circumferential rib 30124 and the third circumferential rib 30125 can be determined, and then the spacing between any two adjacent second bars 3012 can be determined.

[0116] By calculating the ratio of the arc length R1 to the radius of the fixed portion 302, or calculating at least one of the ratios of the arc length R2 to the radius of the fixed portion 302, the spacing between any two adjacent second bars 3012 can be determined, so that the spacing between any two adjacent second bars 3012 is increased while the air outlet grille 30 meets the requirements of mold processing and installation specifications, thereby facilitating the airflow blown out of the outdoor fan 20 to flow out of the air outlet grille 30, thereby reducing the resistance of the air outlet grille 30 to the airflow blown out of the outdoor fan 20.

[0117] As shown in FIG. 14 , in some embodiments of the present disclosure, at least one second grating 3012 further includes a fourth circumferential rib 30126, which is disposed proximate to the fixing portion 302. The opening of the fourth circumferential rib 30126 at one end proximate to the outdoor fan 20 is smaller than the opening at the end distal thereto. That is, the radial dimension of the fourth circumferential rib 30126 gradually decreases in a direction away from the outdoor fan 20. This facilitates the guidance of the airflow flowing to the location of the fourth circumferential rib 30126 and solves the problem of different air volumes and different air outlet directions at different locations on the air outlet grille 30, which, when the radial dimensions of multiple second gratings 3012 are consistent, can affect the air volume of the outdoor unit 1.

[0118] At this time, the ratio of the radius J of at least one second grid bar 3012 to the first distance L3 satisfies: 0.28≤J / L3≤0.44.

[0119] As shown in FIG. 19 , when the radial dimension of the fourth circumferential rib 30126 is not adjusted, the collision between the airflow and the fourth circumferential rib 30126 will generate a larger vortex, thereby causing greater resistance to the airflow.

[0120] As shown in Figure 20, after the fourth circumferential rib 30126 is adjusted according to the above conditions, the airflow is guided by the fourth circumferential rib 30126, and the vortex generated by the airflow at the fourth circumferential rib 30126 is reduced, the resistance encountered by the airflow at this location is reduced, and the flow rate is also more stable.

[0121] In some embodiments of the present disclosure, as shown in Figure 14, at least one second grid bar 3012 also includes a fifth circumferential rib 30127, which is located in the middle position of the fixing portion 302 and the supporting portion 303 in the radial direction of the air outlet grille 30. The airflow at this position flows smoothly, and therefore, the radial dimension of the fifth circumferential rib 30127 does not change in the direction away from the outdoor fan 20.

[0122] At this time, the ratio of the radius J of at least one second grid bar 3012 to the first distance L3 satisfies: 0.44≤J / L3≤0.78.

[0123] In some embodiments of the present disclosure, as shown in Figure 14, at least one second grid bar 3012 also includes a sixth circumferential rib 30128, which is located near the support portion 303. The opening of the end of the sixth circumferential rib 30128 close to the outdoor fan 20 is larger than the opening of the end away from the outdoor fan 20, that is, the radial dimension of the sixth circumferential rib 30128 gradually increases in the direction away from the outdoor fan 20, so that the sixth circumferential rib 30128 can guide the wind flowing to the position of the sixth circumferential rib 30128.

[0124] At this time, the ratio of the radius J of at least one second grid bar 3012 to the first distance L3 satisfies: J / L3≥0.78.

[0125] As shown in Figure 21, when the radial dimension of the sixth circumferential rib 30128 is not adjusted, the airflow collides more severely with the air outlet grille 30 at the sixth circumferential rib 30128, and a large vortex is generated near the support portion 303, thereby causing greater resistance to the airflow.

[0126] As shown in FIG22 , after the sixth circumferential rib 30128 is adjusted according to the above conditions, the airflow is guided by the sixth circumferential rib 30128 , and the vortex generated by the airflow at the sixth circumferential rib 30128 is reduced, the resistance encountered by the airflow at this point is reduced, and the flow rate is also more stable.

[0127] It should be noted that when J / L3 is less than 0.28, the radius J of the at least one second grating rib 3012 is smaller than the radius of the support portion 303. In this case, only the support portion 303 can be installed, and the at least one second grating rib 3012 cannot be installed. When J / L3 is equal to 0.28, the at least one second grating rib 3012 is fixed to the peripheral wall of the support portion 303.

[0128] In some embodiments of the present disclosure, the projection of the axis of at least one second grid bar 3012 on its inner wall surface is a first straight line segment.

[0129] As shown in Figure 14, when 0.28≤J / L3≤0.44, that is, when the first straight line segment is the projection of the axis of the fourth circumferential rib on its inner wall surface, the angle C1 between the extension line of the first straight line segment and the axis of at least one second grid bar 3012 is C1=75-160×(J / L3).

[0130] In this way, the airflow flowing to the peripheral ribs 30124 of the air outlet grille 30 can be better guided, thereby reducing the resistance of the air outlet grille 30 to the airflow blown out by the outdoor fan 20.

[0131] In some embodiments of the present disclosure, when J / L3 ≥ 0.78, that is, the first straight line segment is the projection of the axis of the sixth circumferential rib 30128 on the inner wall surface of the sixth circumferential rib 30128, the angle C2 between the extension line of the first straight line segment and the axis of at least one second grid bar 3012 is C2 = 50-64×(J / L3).

[0132] In this way, the airflow flowing to the sixth circumferential rib 30128 of the air outlet grille 30 can be better guided, thereby reducing the resistance of the air outlet grille 30 to the airflow blown out by the outdoor fan 20.

[0133] As shown in Figures 23 and 24, at least one first grid bar 3011 includes a wind guide surface 3013. The wind guide surface 3013 is the side of two adjacent first grid bars 3011 facing each other. The wind guide surface 3013 includes a first side 30131 and a second side 30132, and the second side 30132 is located on the side of the first side 30131 away from the outdoor fan 20.

[0134] In some embodiments of the present disclosure, when the rotation speed of the outdoor fan 20 is low, the air guide surface 3013 is perpendicular to the end surface of the fixing portion 302 facing the air outlet grille 30 .

[0135] In other embodiments of the present disclosure, an angle γ is formed between the air guide surface 3013 and the end surface of the fixing portion 302 facing the air outlet grille 30. That is, in the axial direction of the fixing portion 302, along the rotation direction of the outdoor fan 20 (such as direction Y in Figure 24), the second side edge 30132 is located on one side of the first side edge 30131. In some embodiments of the present disclosure, the angle γ satisfies the following: 80°≤γ<90°. For example, the angle γ can be 80°, 82°, 84°, 85°, 86°, or 89°. In this way, the air guide surface 3013 can facilitate the guidance of the airflow blown by the outdoor fan 20, thereby reducing the resistance generated by the air outlet grille 30 to the airflow blown by the outdoor fan 20.

[0136] In some embodiments of the present disclosure, as shown in FIG23 , the axial dimension of the fixing portion 302 is defined as a fourth dimension H4. The fourth dimension H4 satisfies the following conditions: 5 mm ≤ H4 ≤ 60 mm. For example, the fourth dimension H4 may be 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, or 60 mm. This reduces the resistance of the fixing portion 302 to airflow.

[0137] It should be noted that when H4 is less than 5 mm, the production difficulty of the fixing portion 302 will increase, and the strength of the fixing portion 302 will be reduced, so that the fixing portion 302 will be easily damaged during use.

[0138] When H4>60mm, since the air outlet grille 30 is fixed to the end of the fixing portion 302 away from the outdoor fan 20, the distance between the air outlet grille 30 and the outdoor fan 20 will be too large, causing the airflow to be too dispersed when blowing onto the air outlet grille 30, thereby increasing the resistance to the airflow and the air volume loss.

[0139] In some embodiments of the present disclosure, as shown in FIG25 , the fixing portion 302 includes at least one through hole 3021, which is disposed on a side of the fixing portion 302 away from the outdoor fan 20. In this manner, the airflow flowing to the fixing portion 302 can flow out through the at least one through hole 3021, thereby further reducing the resistance of the fixing portion 302 to the airflow blown out by the outdoor fan 20.

[0140] A dimension of the through hole 3021 along the axial direction of the fixing portion 302 is defined as L4, and L4 satisfies the following: 0.023≤2L4 / D2≤0.027.

[0141] The maximum dimension of the through hole 3021 along the circumference of the fixing portion 302 is defined as L5, and L5 satisfies: 0.09≤2L5 / D2≤0.1. In this way, the area of ​​the through hole 3021 can be made larger, which is more conducive to the outflow of air from the through hole 3021.

[0142] As shown in Figure 26, when no through hole 3021 is provided on the side wall of the fixing portion 302 away from the outdoor fan 20, the airflow flowing to the fixing portion 302 is blocked by the fixing portion 302, thereby colliding with the fixing portion 302 and at least one grid bar 301 near the fixing portion 302, thereby affecting the flow rate of the airflow at that location and causing resistance to the flow of the airflow at that location.

[0143] As shown in Figure 27, after the through hole 3021 is opened on the fixing portion 302, the impact of the airflow flowing to the fixing portion 302 on the fixing portion 302 and at least one grid bar 301 near the fixing portion 302 is reduced, and the flow rate of the airflow at this location is also improved, reducing the resistance of the fixing portion 302 to the airflow.

[0144] Table 1 Comparison of outdoor unit size parameters and performance parameters

[0145] Table 1 is a table comparing the dimensional parameters and performance parameters of outdoor units according to some embodiments. As shown in Table 1, the dimensional relationship between the air guide 40 and the air outlet grille 30 was simulated. In some embodiments of the present disclosure, Scheme 1 and Scheme 2 are provided. The minimum radial dimension D1 of the air guide 40 in Scheme 1 is equal to the minimum radial dimension D1 of the air guide 40 in Scheme 2, and the minimum radial dimension D2 of the air outlet grille 30 in Scheme 1 is 40 mm smaller than the minimum radial dimension D2 of the air outlet grille 30 in Scheme 2. At this time, the value of (D2-D1) / D1 in Scheme 2 is approximately 0.088, the value of (D2-D1) / D1 in Scheme 1 is approximately 0.023, and the value of (D2-D1) / D1 in Scheme 2 is 0.065 greater than the value of (D2-D1) / D1 in Scheme 1.

[0146] The air output of outdoor unit 1 reaches the same value, for example, 4626 m³ / h. At this time, the speed of fan 20 in Scheme 1 is 681 rpm, while the speed of fan 20 in Scheme 2 is 634 rpm. That is, to achieve the same air output, the speed of fan 20 required in Scheme 2 is 47 rpm lower than that required in Scheme 1. Furthermore, the noise generated by outdoor unit 1 in Scheme 1 is 56.8 dB, while the noise generated by outdoor unit 1 in Scheme 2 is 54.7 dB, meaning that the noise generated by outdoor unit 1 in Scheme 2 is 2.1 dB lower than that generated by outdoor unit 1 in Scheme 1.

[0147] As can be seen from Table 1, when the diffusion range of the airflow after blowing out of the air guide portion 40 remains unchanged, the increase in the minimum radial dimension D2 of the air outlet grille 30 relative to the minimum radial dimension D1 of the air guide portion 40 can reduce the loss of air outlet volume caused by the air outlet grille 30, and can make the required speed of the fan 20 lower and the noise generated lower when the outdoor unit 1 achieves the same air volume and obtains the same heat exchange efficiency, thereby improving the user experience of the outdoor unit 1.

[0148] The diameter of the largest circular ring formed by the rotation of the fan blade 201 is D3, and the value of D3 is 600 mm. The axial dimension of the fixing portion 302 of the air outlet grille 30 at the mounting port 101 is L1, and L1 is 30 mm. The minimum radial dimension D1 of the air guide portion 40 in Scheme 2, the diameter D3 of the largest circle formed by the rotation of the fan blade 201, and the axial dimension L1 of the fixing portion 302 of the air outlet grille 30 at the mounting port 101 are consistent with those in Scheme 1.

[0149] It can be understood that the airflow generated by the fan 20 is guided by the air guide part 40 to blow onto the air outlet grille 30, and the resistance of the air outlet grille 30 is reduced, which reduces the air volume loss, increases the air volume of the outdoor unit 1, and thus improves the heat exchange efficiency of the outdoor unit 1.

[0150] As shown in Figure 28, in some embodiments of the present disclosure, the housing 10 includes a panel 11, the panel 11 includes a first plate body 111, a second plate body 112 and a third plate body 113, and the first plate body 111, the second plate body 112 and the third plate body 113 are connected in sequence along the radial direction of the installation port 101.

[0151] The first plate 111 is arranged around the second plate 112, and the second plate 112 is arranged around the third plate 113. The third plate 113 is arranged on the side of the first plate 111 facing the accommodating cavity 102, and the mounting opening 101 is formed on the third plate 113. In this way, when the air outlet grille 30 is installed at the mounting opening 101, the axial dimension of the outdoor unit 1 at the mounting opening 101 is smaller than the sum of the axial dimensions of the fixing portion 302 of the air outlet grille 30 and the housing 10 at the mounting opening 101, thereby meeting the requirement for a compact design of the outdoor unit 1.

[0152] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

1. An air conditioner, comprising: Indoor unit, including indoor heat exchanger; Outdoor unit, including: compressor; outdoor heat exchanger; The housing comprises a mounting opening and a receiving cavity, wherein the mounting opening is in communication with the outside and the receiving cavity; an outdoor fan, the outdoor fan being disposed in the accommodating cavity and opposite to the mounting opening; an air outlet grille, the air outlet grille being disposed at the mounting opening and connected to the housing; and an air guide portion, the air guide portion being disposed in the accommodating cavity and located at the mounting opening; the air guide portion being connected to the housing and extending along the circumference of the mounting opening; Among them, the minimum radial dimension of the air guide portion is defined as D1, the minimum radial dimension of the air outlet grille is defined as D2, and the minimum radial dimension D1 of the air guide portion and the minimum radial dimension D2 of the air outlet grille satisfy: 0≤(D2-D1) / D1≤0.25, so as to reduce the obstruction of the air flow by the air guide portion.

2. The air conditioner according to claim 1, wherein The minimum radial dimension D1 of the air guide portion and the minimum radial dimension D2 of the air outlet grille further satisfy the following: 0.05≤(D2-D1) / D1≤0.

15.

3. The air conditioner according to claim 1 or 2, wherein: The outdoor fan comprises: a motor connected to the housing; A fan blade is connected to the motor, and the fan blade is arranged opposite to the mounting opening; In which, the motor is configured to drive the fan blades to rotate, and the diameter of the largest circle formed by the rotation of the fan blades is defined as D3. The minimum radial dimension D1 of the air guide portion and the diameter D3 of the largest circle satisfy: 0.02≤(D1-D3) / D3≤0.1, and D1-D3≥12mm.

4. The air conditioner according to any one of claims 1 to 3, wherein: The air outlet grille comprises: a fixing portion extending circumferentially along the edge of the air outlet grille and connected to the housing; At least one grid bar, the at least one grid bar being disposed in the fixing portion and connected to the fixing portion; The dimension of the fixing portion in the axial direction of the mounting opening is defined as L1, and the dimension L1 satisfies: 5 mm ≤ L1 ≤ 60 mm.

5. The air conditioner according to any one of claims 1 to 4, wherein: The air guide portion includes: a first sub-air guide portion, the first sub-air guide portion being connected to the housing; a second sub-air guide portion, wherein the first sub-air guide portion and the second sub-air guide portion are connected, and the second sub-air guide portion is located on a side of the first sub-air guide portion away from the housing; A radial dimension of the first sub-air guiding portion decreases along a direction from the first sub-air guiding portion to the second sub-air guiding portion.

6. The air conditioner according to claim 5, wherein The dimension of the first sub-air guide portion in the axial direction of the mounting opening is defined as L2, and the dimension L2 satisfies 0<L2≤20mm.

7. The air conditioner according to claim 5 or 6, wherein: The first sub-air guide portion includes an inner circumferential surface, and an included angle α between a normal line of the inner circumferential surface and an axis of the mounting opening is defined as α, wherein the included angle α satisfies: 75°≤α<90°.

8. The air conditioner according to claim 5 or 6, wherein: The minimum radial dimension of the second sub-air guiding portion is the minimum radial dimension D1 of the air guiding portion.

9. The air conditioner according to any one of claims 1 to 6, wherein: The housing includes a panel; The panel includes a first plate body, a second plate body and a third plate body, wherein the first plate body, the second plate body and the third plate body are sequentially connected along the radial direction of the installation opening; The first plate is arranged around the second plate, the second plate is arranged around the third plate, and the third plate is arranged on a side of the first plate facing the accommodating cavity; The installation opening is arranged on the third plate body.

10. The air conditioner according to any one of claims 1 to 9, wherein: The air outlet grille comprises: a support portion, disposed coaxially with the air outlet grille and configured to support at least one bar; a fixing portion extending along the axis of the air outlet grille and connected to the housing; The at least one grid bar comprises: at least one first bar, one end of the at least one first bar being connected to the support portion, and the other end of the at least one first bar being directed toward the fixing portion and extending radially along the air outlet grille; at least one second bar, spaced apart around the axis of the air outlet grille and cross-connected with the at least one first bar; The dimension of the at least one second grating in the axial direction of the fixing portion is defined as a first dimension H1, and the dimension of the at least one first grating in the axial direction of the fixing portion is defined as a second dimension H2; the first dimension H1 and the minimum radial dimension D2 of the air outlet grille satisfy: H1 ≥ 6 mm, and 0.011 ≤ H1 / D2 ≤ 0.014; The second dimension H2 and the minimum radial dimension D2 of the air outlet grille satisfy the following: 0.011≤H2 / D2≤0.

014.

11. The air conditioner according to claim 10, wherein The at least one first grating includes a plurality of first gratings, and an angle between extension directions of two adjacent first gratings in the plurality of first gratings is defined as β, and the angle β satisfies: 7°≤β<11°.

12. The air conditioner according to any one of claims 10 or 11, wherein: The second grid bar extends along the circumference of the annular frame; The at least one first bar comprises: At least one first rib and at least one second rib; the at least one first rib and the at least one second rib are arranged in sequence in the circumferential direction of the fixing portion; the at least one first rib and the at least one second rib extend radially along the fixing portion, and the length of the at least one first rib is greater than the length of the at least one second rib.

13. The air conditioner according to claim 12, wherein: A distance from the axis of the fixing portion to an end of the second rib away from the fixing portion is defined as a first distance L3; the first distance L3 and the minimum radial dimension D2 satisfy: 0.55≤2L3 / D2≤0.

7.

14. The air conditioner according to claim 13, wherein The at least one second grating includes a plurality of second gratings, and the distance between any two adjacent second gratings in the plurality of second gratings in the radial direction of the air outlet grille is the same as the distance between a second grating close to the fixing portion in the plurality of second gratings and the fixing portion in the radial direction of the air outlet grille; At least one of the plurality of second bars comprises: a first circumferential rib, the first circumferential rib being connected to the first bars; the first circumferential rib comprising a first arc segment; the first arc segment being an arc of the first circumferential rib located between two adjacent first bars; a second circumferential rib, the second circumferential rib being a second rib close to the fixed portion among the plurality of second ribs between an end of the second rib away from the fixed portion and the axis of the air outlet grille; the second circumferential rib comprising a second arc segment, the second arc segment being an arc of the second circumferential rib located between two adjacent first ribs; The arc length of the first arc segment is defined as R1, and the arc length R1 satisfies: 0.15≤2R1 / D2≤0.2; The arc length of the second arc segment is defined as R2, and the arc length R2 satisfies: 0.15≤2R2 / D2≤0.

2.

15. The air conditioner according to claim 13 or 14, wherein: defining a radius of the at least one second grid bar as J; If it is determined that the radius J of the second grid bar and the first distance L3 satisfy: 0.28≤J / L3≤0.44, then The radial dimension of the at least one second grid bar decreases in a direction away from the outdoor fan; If it is determined that the radius J of the second grating bar and the first distance L3 satisfy: 0.44≤J / L3≤0.78, then the radial dimension of the at least one second grating bar remains unchanged in the direction away from the outdoor fan; If it is determined that the radius J of the second grating and the first distance L3 satisfy: J / L3≥0.78, the radial dimension of the at least one second grating increases in a direction away from the outdoor fan.

16. The air conditioner according to claim 15, wherein defining a projection of an axis of the at least one second grating bar on its inner wall surface as a first straight line segment; If it is determined that the radius J of the second grating bar and the first distance L3 satisfy: 0.28≤J / L3≤0.44, then the angle C1 between the extension line of the first straight line segment and the axis of the at least one second grating bar is C1=75-160×(J / L3); If it is determined that the radius J of the second bar and the first distance L3 satisfy: J / L3≥0.78, then the angle C2 between the extension line of the first straight line segment and the axis of the at least one second bar is C2=50-64×(J / L3).

17. The air conditioner according to any one of claims 12 to 14, wherein: The at least one first grid bar comprises a wind guide surface, and the wind guide surface is a side surface of two adjacent first grid bars facing each other; Wherein, the air guide surface satisfies one of the following conditions: The air guide surface is perpendicular to the end surface of the fixing portion facing the air outlet grille; Alternatively, an angle γ is formed between the air guide surface and the end surface of the fixing portion facing the air outlet grille.

18. The air conditioner according to any one of claims 11 to 14, wherein: The fixing portion includes at least one through hole, and the at least one through hole is arranged on a side of the fixing portion away from the outdoor fan.

19. The air conditioner according to claim 18, wherein: The dimension of the through hole along the axial direction of the fixing portion is defined as L4, and the dimension L4 satisfies: 0.023≤2L4 / D2≤0.027; The maximum dimension of the through hole along the circumference of the fixing portion is defined as L5, and the dimension L5 satisfies: 0.09≤2L5 / D2≤0.

1.

20. The air conditioner according to any one of claims 11 to 14, wherein: The first size H1 and the second size H2 satisfy: H2<H1; The end of the first grid bar away from the outdoor fan is connected to the side of the end of the second grid bar away from the outdoor fan, which is close to the outdoor fan; One end of the first grid bar close to the outdoor fan is connected to a side of the second grid bar close to the outdoor fan and away from the outdoor fan.

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