Fan assemblies and air conditioners

Abstract

The present invention relates to the technical field of air conditioners, and discloses a fan assembly and an air conditioner, wherein a driving shaft includes a large diameter section and a small diameter section, and an axial hole of a shaft sleeve includes a first mating section mating with the large diameter section and a second mating section mating with the small diameter section, wherein the side wall of the first mating section is provided with an open groove connected to the axial hole, and the slot width of the open groove is larger than the diameter of the small diameter section but smaller than the diameter of the large diameter section. When installing the fan, the small diameter section of the driving shaft can be first radially inserted directly into the open groove of the side wall of the first mating section, and then the large diameter section can be pushed in along the axial direction of the driving shaft to match the first mating section. Since the diameter of the large diameter section is larger than the slot width of the open groove, the large diameter section can be tightly mated with the first mating section to prevent loosening. In this way, the axial installation distance of the driving shaft can be effectively shortened, and then the axial distance between the fan and the indoor unit cover can be shortened, thereby ensuring the stability of the fan during operation and reducing fan noise.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a fan assembly and an air conditioner. Background Art

[0002] As people's living standards gradually improve, their requirements for living environment are getting higher and higher. Due to the regulating effect of air conditioners on ambient temperature and / or humidity, they are widely used in room comfort adjustment.

[0003] After using the existing air conditioner for a period of time, a large amount of dust will accumulate on the internal air duct system and other components, which can easily lead to the breeding of harmful bacteria, making the air conditioner a secondary pollution source and directly endangering human health.

[0004] Because the assembly relationship between the various parts of traditional air conditioners is complicated and users cannot disassemble and clean them by themselves, today's easily disassembled and cleaned air conditioners are becoming more and more popular. In the easily disassembled and cleaned indoor unit, the fan of the indoor unit is detachably connected to the drive motor that drives the fan. Specifically, the drive motor is fixed to the side wall of the indoor unit cover, and one end of the fan is provided with a connecting shaft for cooperating with the bearing seat on the cover, and the other end of the fan is provided with a sleeve that is mounted to cooperate with the motor shaft of the drive motor. When disassembling, the fan is withdrawn a certain distance along the axial direction of the motor shaft so that the motor shaft and the sleeve are separated. In order to ensure a stable fit between the motor shaft and the sleeve, the motor shaft needs to be set to a sufficient length to be inserted into the sleeve to cooperate with it. However, when the fan is disassembled, the fan connecting shaft end needs to be provided with sufficient space for the sleeve end to be correspondingly withdrawn and disassembled. In this way, the axial distance between the fan and the indoor unit cover is invisibly increased, thereby reducing the stability of the fan during operation, affecting the performance of the fan, and being accompanied by noise. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in order to facilitate the insertion of the shaft sleeve into the motor shaft for installation, the existing fan needs to provide sufficient space for the corresponding exit of the shaft sleeve end during disassembly, which increases the axial distance between the fan and the indoor unit cover, thereby reducing the stability of the fan during operation, affecting the performance of the fan, and being accompanied by noise.

[0006] In order to solve the above technical problems, the present invention provides a fan assembly, comprising:

[0007] A fan, wherein a shaft sleeve is provided at one end of the fan along its axial direction, the shaft hole of the shaft sleeve includes a first mating segment and a second mating segment, the aperture of the first mating segment is larger than the aperture of the second mating segment, and the side wall of the first mating segment is provided with an open groove communicating with the shaft hole;

[0008] a drive motor having a drive shaft mated with the shaft sleeve, the drive shaft comprising a large diameter section and a small diameter section, the small diameter section mating with the second mating section, and the large diameter section mating with the first mating section;

[0009] The slot width of the open slot is defined as A, the diameter of the large-diameter section is defined as D1, the diameter of the small-diameter section is defined as D2, and D2<A≤D1.

[0010] Furthermore, the open groove includes a guide groove section and a clamping groove section, the clamping groove section is located outside the guide groove section, the groove opening width of the guide groove section is A1, the groove opening width of the clamping groove section is A2, D2<A2<A1≤D1.

[0011] Furthermore, a limit piece is provided on the large diameter section, and a connecting hole arranged in a radial direction and connected to the first mating section is provided on the sleeve, and a fastening screw is provided in the connecting hole. When the drive shaft is assembled into the sleeve so that the limit piece abuts against the end of the sleeve, a part of the small diameter section corresponds to a part of the first mating section and a gap is formed between the two, and the lower end of the fastening screw abuts against the small diameter section through the gap.

[0012] Furthermore, the connecting hole is provided on a peripheral wall of the shaft sleeve corresponding to the guide groove section.

[0013] Furthermore, the gap formed between the small-diameter section and the first fitting section is 0.3-1.5 mm.

[0014] Furthermore, the length of the gap along the axial direction of the drive shaft is defined as W1, the outer diameter of the fastening screw is defined as W2, and W1>W2.

[0015] Furthermore, a conical transition surface is provided at the connection between the large-diameter section and the small-diameter section.

[0016] Furthermore, the distance between the limiting member and the tapered transition surface is defined as L1, the length of the groove of the clamping groove section is defined as L2, and L1=L2.

[0017] Furthermore, a guiding cone surface is provided at the front end of the small-diameter section.

[0018] Furthermore, the limiting member is a positioning retaining ring sleeved on the large diameter section.

[0019] Compared with the prior art, the fan assembly and air conditioner according to the embodiment of the present invention have the following advantages:

[0020] The fan assembly of the embodiment of the present invention includes a fan and a drive motor, and the drive shaft of the drive motor cooperates with the shaft sleeve on the fan. Specifically, the drive shaft includes a large diameter section and a small diameter section, and the shaft hole of the shaft sleeve includes a first cooperation section that cooperates with the large diameter section and a second cooperation section that cooperates with the small diameter section, wherein the side wall of the first cooperation section is provided with an open groove connected to the shaft hole, and the slot width of the open groove is larger than the diameter of the small diameter section but smaller than the diameter of the large diameter section. When installing the fan, the small diameter section of the drive shaft can be first radially inserted directly into the open groove on the side wall of the first cooperation section, and then the large diameter section can be pushed in along the axial direction of the drive shaft to cooperate with the first cooperation section. Since the diameter of the large diameter section is larger than the slot width of the open groove, the large diameter section can be tightly cooperated with the first cooperation section to prevent loosening. In this way, the axial installation distance of the drive shaft can be effectively shortened, and then the axial distance between the fan and the indoor unit cover can be shortened, thereby ensuring the stability of the fan during operation and reducing fan noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a fan assembly when the fan is detached from the drive shaft according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a fan assembly when the fan is assembled into a drive shaft according to an embodiment of the present invention;

[0023] Figure 3 yes Figure 1 A magnified schematic diagram of point B in FIG.

[0024] Figure 4 yes Figure 2 A schematic diagram of a partial cross-sectional structure of the shaft sleeve and the drive shaft;

[0025] Figure 5 is a schematic structural diagram of a fan according to an embodiment of the present invention;

[0026] Figure 6 2. It is a schematic structural diagram of an open groove on a shaft sleeve according to an embodiment of the present invention;

[0027] Figure 7 is a schematic cross-sectional view of a shaft sleeve according to an embodiment of the present invention;

[0028] Figure 8 Schematic diagram of the structure of a drive motor according to an embodiment of the present invention.

[0029] In the figure, 1. fan assembly; 10. fan; 20. drive motor; 30. fastening screw; 101. bushing; 102. shaft hole; 1021. first mating section; 1022. second mating section; 103. opening groove; 1031. guide groove section; 1032. clamping groove section; 104. connecting hole; 105. connecting shaft; 201. drive shaft; 2011. large diameter section; 2012. small diameter section; 202. limiter; 203. gap; 204. conical transition surface; 205. guide conical surface. DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0031] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] The present application relates to the technical field of air conditioning structures. Specifically, an air conditioner performs a refrigerant cycle through a compressor, a condenser, an expansion valve, and an evaporator. The refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation. The compressor compresses the refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase and releases heat to the surrounding environment through the condensation process. The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. Throughout the refrigerant cycle, the air conditioner can adjust the temperature and humidity of the indoor space.

[0035] The air conditioner's outdoor unit includes a compressor and an outdoor heat exchanger, while the indoor unit includes an indoor heat exchanger. The expansion valve can be located in either the indoor or outdoor unit. One of the indoor and outdoor heat exchangers functions as a condenser, while the other functions as an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner operates as a heater in heating mode. When the indoor heat exchanger functions as an evaporator, the air conditioner operates as a cooler in cooling mode.

[0036] like Figures 1 to 8 As shown, a fan assembly 1 of a preferred embodiment of the present invention specifically includes a fan 10 and a drive motor 20. The rotation of the fan 10 of the fan assembly 1 is mainly used for heat exchange, absorbing heat and dissipating cold during cooling, and absorbing cold and dissipating heat during heating. One end of the fan 10 is provided with a shaft sleeve 101 along its axial direction. The shaft hole 102 of the shaft sleeve 101 includes a first matching section 1021 and a second matching section 1022. The aperture of the first matching section 1021 is larger than the aperture of the second matching section 1022. The first matching section 1021 is larger than the aperture of the second matching section 1022. The side wall of the coupling section 1021 is provided with an open groove 103 connected to the shaft hole 102. The drive motor 20 has a drive shaft 201 that cooperates with the shaft sleeve 101. The drive shaft 201 includes a large diameter section 2011 and a small diameter section 2012. The small diameter section 2012 cooperates with the second matching section 1022, and the large diameter section 2011 cooperates with the first matching section 1021. The slot width of the open groove 103 is defined as A, the diameter of the large diameter section 2011 is D1, and the diameter of the small diameter section 2012 is D2, and D2<A≤D1.

[0037] Specifically, the drive shaft 201 includes a large diameter section 2011 and a small diameter section 2012, and the shaft hole 102 of the shaft sleeve 101 includes a first matching section 1021 that matches the large diameter section 2011 and a second matching section 1022 that matches the small diameter section 2012, wherein the side wall of the first matching section 1021 is provided with an open groove 103 that communicates with the shaft hole 102, and the slot width of the open groove 103 is greater than the diameter of the small diameter section 2012 but smaller than the diameter of the large diameter section 2011. When the fan 10 is installed, the small diameter section 2012 of the drive shaft 201 can be directly radially inserted into the open groove 103 on the side wall of the first matching section 1021. Install it, and then push the large diameter section 2011 into the corresponding first matching section 1021 along the axial direction of the drive shaft 201. Since the diameter of the large diameter section 2011 is larger than the slot width of the open slot 103, the large diameter section 2011 and the first matching section 1021 can be tightly matched to prevent loosening. In this way, compared with the existing method of installing the drive shaft 201 as a whole into the sleeve 101 along the axial direction, the axial installation distance of the drive shaft 201 can be effectively shortened, thereby shortening the axial distance between the fan 10 and the indoor unit cover, ensuring the stability of the fan 10 during operation, and reducing the noise of the fan 10.

[0038] Furthermore, the opening groove 103 includes a guide groove section 1031 and a clamping groove section 1032. The clamping groove section 1032 is located on the outside of the guide groove section 1031. The slot width of the guide groove section 1031 is A1, and the slot width of the clamping groove section 1032 is A2. D2<A2<A1≤D1. By arranging the clamping groove section 1032 at the slot of the opening groove 103, that is, at the end face of the sleeve 101, the slot width of the clamping groove section 1032 is smaller than the slot width of the guide groove section 1031, thereby ensuring the clamping degree between the second matching section 1022 at the end face of the sleeve 101 and the large diameter section 2011 of the drive shaft 201, thereby ensuring the stability of the fit between the drive shaft 201 and the sleeve 101.

[0039] Furthermore, a limit piece 202 is provided on the large diameter section 2011, and a connecting hole 104 arranged in the radial direction and connected to the first matching section 1021 is provided on the sleeve 101. A fastening screw 30 is provided in the connecting hole 104. When the drive shaft 201 is assembled into the sleeve 101 so that the limit piece 202 abuts against the end of the sleeve 101, a part of the small diameter section 2012 corresponds to a part of the first matching section 1021 and a gap 203 is formed between the two. The lower end of the fastening screw 30 abuts against the small diameter section 2012 through the gap 203, and the fastening screw 30 locks the drive shaft 201 and the sleeve 101 to ensure the connection between the two. The stability of the indoor unit is ensured, thereby preventing relative movement between the two and causing improper operation of the indoor unit. Moreover, the fastening screw 30 and the limit piece 202 lock and limit the drive shaft 201 in the radial and axial directions respectively, to prevent the drive shaft 201 from loosening with the sleeve 101. At the same time, due to the circumferential gap 203 between the small diameter section 2012 and the first matching section 1021, the lower end of the fastening screw 30 abuts against the small diameter section 2012 through the gap 203, which can effectively avoid the local protrusion generated by the fastening screw 30 and the small diameter section 2012 during the fastening process, making it difficult or impossible to disassemble the sleeve 101 and the drive shaft 201 again.

[0040] In this embodiment, the connecting hole 104 is provided on the peripheral wall of the sleeve 101 corresponding to the guide groove section 1031. Since the slot width of the guide groove section 1031 is greater than the slot width of the clamping groove section 1032 and the diameter of the small diameter section 2012, when the fastening screw 30 applies a force to the drive shaft 201 during the fastening process, a local bulge is generated on the surface of the drive shaft 201. When the local bulge causes the radial dimension of the position of the fastening screw 30 on the drive shaft 201 to become larger, it can also pass through the guide groove section 1031 smoothly, thereby ensuring that the drive shaft 201 can be smoothly installed in the sleeve 101.

[0041] Furthermore, the gap 203 formed between the small-diameter section 2012 and the first mating section 1021 is 0.3 to 1.5 mm. This prevents the formation of a local protrusion during the tightening process between the fastening screw 30 and the small-diameter section 2012, which could make it difficult or impossible to remove the sleeve 101 from the drive shaft 201. To ensure that the lower end of the fastening screw 30 fully abuts the small-diameter section 2012 of the drive shaft 201, thereby locking the drive shaft 201, the length of the gap 203 along the axial direction of the drive shaft 201 is defined as W1, and the outer diameter of the fastening screw 30 is defined as W2, where W1>W2.

[0042] In order to facilitate the assembly of the drive shaft 201 and prevent the front end of the drive shaft 201 from scratching the operator or damaging the mating surface of the parts during assembly, a guide cone 205 is provided at the front end of the small diameter section 2012 of the drive shaft 201. Generally, the semi-cone angle of the guide cone 205 is set to 10°. Figure 8 As shown, a conical transition surface 204 is provided at the connection between the large diameter section 2011 and the small diameter section 2012 of the drive shaft 201 to facilitate the processing of the drive shaft 201 and ensure the structural strength of the drive shaft 201. In this embodiment, the distance between the limit member 202 and the conical transition surface 204 is defined as L1, and the slot length of the clamping groove section 1032 is L2, L1=L2, that is, when the drive shaft 201 is assembled into the sleeve 101, the shaft section between the limit member 202 and the conical transition surface 204 is correspondingly assembled into the clamping groove section 1032, and the small diameter section 2012 is correspondingly assembled into the second matching section 1022, thereby ensuring the coaxiality between the sleeve 101 of the fan 10 and the drive shaft 201 of the motor, and ensuring the smoothness and reliability of the operation of the fan 10.

[0043] The limiter 202 is used to limit the depth of the drive shaft 201 inserted into the sleeve 101 to ensure that the drive shaft 201 and the sleeve 101 are installed in place. The limiter 202 can be positioned and fixed when the drive shaft 201 is assembled into the sleeve 101. The limiter 202 works together with the fastening screw 30 to limit the axial and radial movement of the drive shaft 201. In an embodiment of the present invention, the limiter 202 is a positioning retaining ring mounted on the large diameter section 2011, such as an elastic washer or an elastic gasket. The elastic positioning retaining ring can withstand severe vibration and impact loads, and increase the preload force to ensure a stable connection between the drive shaft 201 and the sleeve 101.

[0044] The present invention further discloses an air conditioner, comprising the fan assembly described in the above embodiment, and thus having the beneficial effects of the above fan assembly, which will not be described in detail here.

[0045] The working process of the present invention is as follows: when assembling, first install the connecting shaft 105 at one end of the fan 10 on the bearing seat, then radially align the opening groove 103 of the sleeve 101 of the fan 10 with the small diameter section 2012 of the drive shaft 201, install the drive shaft 201 into the sleeve 101, and then continue to push it in along the axial direction so that the large diameter section 2011 is matched with the first matching section 1021, until the limit member 202 abuts against the end of the sleeve 101, indicating that the drive shaft 201 is installed in place, and then screw the fastening screw 30 into the connecting hole 104, so that the lower end of the fastening screw 30 passes through the first matching section 1021. The gap 203 between the section 1021 and the small diameter section 2012 abuts against the small diameter section 2012 of the drive shaft 201 to lock and fasten the drive shaft 201 and the sleeve 101. When disassembling, first loosen the fastening screw 30, and then withdraw the fan 10 as a whole toward the bearing seat for a distance, so that the small diameter section 2012 disengages from the second mating section 1022 and is removed from the open groove 103 in the radial direction, thereby separating the sleeve 101 from the drive shaft 201, and then move the fan 10 outward so that the connecting shaft 105 at the other end is separated from the bearing seat and the entire fan 10 is removed from the cover of the indoor unit.

[0046] In summary, the embodiments of the present invention provide a fan assembly and an air conditioner. When installing the fan, the small diameter section 2012 of the drive shaft 201 can be radially inserted directly into the open groove 103 on the side wall of the first mating section 1021, and then the large diameter section 2011 can be pushed in along the axial direction of the drive shaft 201 to match the first mating section 1021. Since the diameter of the large diameter section 2011 is larger than the slot width of the open groove 103, the large diameter section 2011 can be tightly fitted with the first mating section 1021 to prevent loosening. In this way, the axial installation distance of the drive shaft 201 can be effectively shortened, thereby shortening the axial distance between the fan and the indoor unit cover, ensuring the stability of the fan during operation, and reducing fan noise.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A fan assembly, characterized in that: include: A fan, wherein a shaft sleeve is provided at one end of the fan along its axial direction, the shaft hole of the shaft sleeve includes a first mating segment and a second mating segment, the aperture of the first mating segment is larger than the aperture of the second mating segment, and the side wall of the first mating segment is provided with an open groove communicating with the shaft hole; a drive motor having a drive shaft mated with the shaft sleeve, the drive shaft comprising a large diameter section and a small diameter section, the small diameter section mating with the second mating section, and the large diameter section mating with the first mating section; The slot width of the open slot is defined as A, the diameter of the large diameter section is defined as D1, the diameter of the small diameter section is defined as D2, and D2<A≤D1; The open groove includes a guide groove section and a clamping groove section. The clamping groove section is located outside the guide groove section. The groove opening width of the guide groove section is A1, and the groove opening width of the clamping groove section is A2. D2<A2<A1≤D1.

2. The fan assembly according to claim 1, wherein The large diameter section is provided with a limit piece, the shaft sleeve is provided with a connecting hole arranged in the radial direction and connected with the first matching section, and a fastening screw is provided in the connecting hole; When the drive shaft is assembled into the sleeve so that the limit member abuts against the end of the sleeve, a portion of the small diameter section corresponds to a portion of the first mating section and a gap is formed therebetween, and the lower end of the fastening screw abuts against the small diameter section through the gap.

3. The fan assembly according to claim 2, wherein: The connecting hole is arranged on the peripheral wall of the shaft sleeve corresponding to the guide groove section.

4. The fan assembly according to claim 2, wherein: The gap formed between the small-diameter section and the first matching section is 0.3-1.5 mm.

5. The fan assembly according to claim 2, wherein: The length of the gap along the axial direction of the drive shaft is defined as W1, the outer diameter of the fastening screw is defined as W2, and W1>W2.

6. The fan assembly according to claim 2, wherein: A conical transition surface is provided at the connection between the large diameter section and the small diameter section.

7. The fan assembly according to claim 6, wherein: The distance between the limiting member and the tapered transition surface is defined as L1, the length of the groove of the clamping groove section is defined as L2, and L1= L2.

8. The fan assembly according to any one of claims 1 to 7, wherein: A guide cone surface is provided at the front end of the small-diameter section.

9. An air conditioner, characterized in that: The invention comprises a fan assembly according to any one of claims 1 to 8.

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