Blower device, heat source unit, utilization unit, and method for manufacturing blower device

Abstract

To improve production efficiency of a blower device including a bell mouth with a porous part.SOLUTION: A first bell mouth (20) includes a first peripheral wall part (21) that forms a first air passage (22). The first peripheral wall part (21) includes an opening (51) penetrating in a thickness direction. A porous part (50) is disposed so as to cover the opening (51). The first peripheral wall part (21) includes a fitting part (55) for fitting the porous part (50) thereto.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a blower device, a heat source side unit, a utilization side unit, and a method for manufacturing the blower device. [Background technology]

[0002] Patent Document 1 discloses a fan motor including a bellmouth (casing) having a cylindrical air tunnel provided in a body portion, and a rotor fan having a plurality of blades provided in the air tunnel.

[0003] In the fan motor of Patent Document 1, a turbulence prevention member is provided on the air inlet side of the body. The turbulence prevention member is made of a material through which air can flow, for example, a porous material with many pores formed therein. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-218150 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when the bellmouth is made of a resin material, it is conceivable to insert-mold a porous portion as a turbulence prevention member into the body portion of the bellmouth.

[0006] However, when attempting to mold the porous portion integrally with the bellmouth, there is a problem in that molding the porous portion takes time, resulting in poor production efficiency.

[0007] An object of the present disclosure is to improve the production efficiency of a blower equipped with a bellmouth including a porous portion. [Means for solving the problem]

[0008] A first aspect of the present disclosure is a blower comprising a fan (16, 36) and a bellmouth (20, 40) having a peripheral wall portion (21, 41) forming an air passage (22, 42) through which air transported by the fan (16, 36) passes, the peripheral wall portion (21, 41) having an opening (51) penetrating in the thickness direction and comprising a porous portion (50) arranged to cover the opening (51), and the peripheral wall portion (21, 41) having an attachment portion (55) for attaching the porous portion (50).

[0009] In the first aspect, the porous portion (50) is attached to the peripheral wall portion (21, 41) by the mounting portion (55), thereby improving production efficiency compared to the case where the porous portion (50) is integrally molded with the bellmouth (20, 40).

[0010] A second aspect of the present disclosure is the air blower of the first aspect, wherein the attachment portion (55) includes a claw portion (56) that engages with the porous portion (50).

[0011] In the second aspect, the porous portion (50) can be easily attached to the peripheral wall portions (21, 41) simply by engaging the porous portion (50) with the claw portions (56).

[0012] A third aspect of the present disclosure is a blower device according to the first or second aspect, wherein the porous portion (50) extends circumferentially around the peripheral wall portion (21, 41), and the mounting portion (55) includes an accommodating portion (57) that accommodates a circumferential end of the porous portion (50).

[0013] In the third embodiment, the end of the porous portion (50) can be restricted so as not to be unintentionally displaced.

[0014] A fourth aspect of the present disclosure is the air blower according to any one of the first to third aspects, wherein the peripheral wall portion (21, 41) has a rib portion (52) extending across the opening portion (51).

[0015] In the fourth aspect, by providing the rib portion (52) at the opening (51), it is possible to ensure the rigidity of the peripheral wall portion (21, 41) even when the opening area of ​​the opening (51) is large.

[0016] A fifth aspect of the present disclosure is the air blower device of any one of the first to fourth aspects, wherein the attachment portion (55) is provided on an outer circumferential surface side of the peripheral wall portion (21, 41).

[0017] In the fifth aspect, the attachment portion (55) is provided on the outer circumferential surface side of the peripheral wall portion (21, 41), thereby making it possible to prevent the air flow on the inner circumferential surface side of the peripheral wall portion (21, 41) from being impeded.

[0018] A sixth aspect of the present disclosure is the air blower device according to any one of the first to fifth aspects, wherein the porous portion (50) is elastically deformable along a circumferential surface of the circumferential wall portion (21, 41).

[0019] In the sixth aspect, by elastically deforming the porous portion (50) along the peripheral surface of the peripheral wall portion (21, 41), the opening (51) can be covered while the porous portion (50) is in close contact with the peripheral wall portion (21, 41).

[0020] A seventh aspect of the present disclosure is the air blower according to any one of the first to sixth aspects, wherein a surface of the porous portion (50) is subjected to a water-repellent treatment.

[0021] In the seventh aspect, by making it difficult for moisture to adhere to the porous portion (50), it is possible to suppress the growth of mold in the porous portion (50).

[0022] An eighth aspect of the present disclosure is the air blower of the seventh aspect, wherein the holes of the porous portion (50) communicate with each other in a thickness direction of the peripheral wall portion (21, 41).

[0023] In the eighth aspect, even in the case of the porous portion (50) that has been subjected to a water-repellent treatment, the pressure of the air flowing through the air passages (22, 42) can be released to the outside of the peripheral wall portion (21, 41) through the holes in the porous portion (50).

[0024] A ninth aspect of the present disclosure is a heat source side unit including a blower (15) of any one of the first to eighth aspects, a refrigerant circuit (1a) through which a refrigerant flows, and a heat exchanger (14) provided in the refrigerant circuit (1a) for exchanging heat between the refrigerant flowing through the refrigerant circuit (1a) and air transported by the blower (15).

[0025] In the ninth aspect, it is possible to provide a heat source side unit including a blower (15), a refrigerant circuit (1a), and a heat exchanger (14).

[0026] A tenth aspect of the present disclosure is a utilization side unit including a blower (35) according to any one of the first to eighth aspects, a refrigerant circuit (1a) through which a refrigerant flows, and a heat exchanger (34) provided in the refrigerant circuit (1a) for exchanging heat between the refrigerant flowing through the refrigerant circuit (1a) and air transported by the blower (35).

[0027] In the tenth aspect, a utilization side unit can be provided, which includes a blower (35), a refrigerant circuit (1a), and a heat exchanger (34).

[0028] An eleventh aspect of the present disclosure is a manufacturing method for a blower comprising a fan (16, 36) and a bellmouth (20, 40) having a peripheral wall portion (21, 41) that forms an air passage (22, 42) through which air transported by the fan (16, 36) passes, the peripheral wall portion (21, 41) having an opening (51) penetrating in the thickness direction, the method comprising the steps of: arranging a porous portion (50) to cover the opening (51); and attaching the porous portion (50) to the peripheral wall portion (21, 41).

[0029] In the eleventh aspect, the opening (51) of the peripheral wall portion (21, 41) is covered with the porous portion (50) and the porous portion (50) is attached to the peripheral wall portion (21, 41). This improves production efficiency compared to the case where the porous portion (50) is integrally molded with the bellmouth (20, 40). [Brief description of the drawings]

[0030] [Figure 1] FIG. 1 is a refrigerant circuit diagram showing the configuration of a refrigeration device according to this embodiment. [Diagram 2] FIG. 2 is a plan sectional view showing the configuration of the heat source side unit. [Diagram 3] FIG. 3 is a side cross-sectional view showing the configuration of the user side unit. [Figure 4] FIG. 4 is a perspective view showing the configuration of the bell mouth. [Diagram 5] FIG. 5 is a perspective view showing the state before the porous portion is attached to the peripheral wall portion of the bellmouth. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Air Conditioning Equipment As shown in Fig. 1, the air conditioner (1) includes a refrigerant circuit (1a) filled with a refrigerant. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle.

[0032] The air conditioner (1) adjusts the temperature of air in an indoor space. The air conditioner (1) performs cooling operation and heating operation. In cooling operation, the air conditioner (1) cools the air in the indoor space. In heating operation, the air conditioner (1) heats the air in the indoor space. The air conditioner (1) includes a heat source unit (10) and a utilization unit (30).

[0033] The heat source side unit (10) is disposed in the outdoor space and includes a compressor (2), a pressure reducing mechanism (3), a four-way switching valve (4), a first heat exchanger (14), and a first blower (15).

[0034] The utilization side unit (30) is disposed in the indoor space and includes a second heat exchanger (34) and a second blower (35).

[0035] <Heat source unit> As shown in Fig. 2, the heat source side unit (10) includes an outdoor casing (11). The outdoor casing (11) is formed in the shape of a rectangular box.

[0036] The interior of the outdoor casing (11) is partitioned into a blower chamber (12) and a machine chamber (13). A first heat exchanger (14) and a first blower (15) are disposed in the blower chamber (12).

[0037] The first heat exchanger (14) exchanges heat between the refrigerant and the outdoor air and is, for example, a fin-and-tube type heat exchanger.

[0038] The first blower (15) includes a first fan (16), a first fan motor (17), and a first bell-mouth (20). The first fan (16) is, for example, a propeller fan. The first fan (16) is disposed substantially coaxially with a first peripheral wall portion (21) of the first bell-mouth (20). The first fan motor (17) drives and rotates the first fan (16).

[0039] The first bell-mouth (20) is provided on a side wall on the front side (lower side in FIG. 2) of the outdoor casing (11). The first bell-mouth (20) has a first circumferential wall portion (21). The first circumferential wall portion (21) is formed in a cylindrical shape. The first circumferential wall portion (21) forms a first air passage (22). The first circumferential wall portion (21) is disposed so as to surround a part of the outer periphery of the first fan (16).

[0040] The first fan (16) transports outdoor air. In FIG. 2, the air flow is indicated by white arrows. The outdoor air is drawn into the outdoor casing (11). When passing through the first heat exchanger (14), the outdoor air exchanges heat with the refrigerant. The air after heat exchange passes through the first air passage (22) of the first bell mouth (20), and is blown out of the outdoor casing (11).

[0041] The compressor (2), the pressure reducing mechanism (3), and the four-way switching valve (4) are disposed in the machine room (13). Note that only the compressor (2) is illustrated in Fig. 2. The compressor (2) compresses the refrigerant. The compressor (2) is a rotary compressor, and may be, for example, a swing type, a rolling piston type, or a scroll type.

[0042] 1, the pressure reduction mechanism (3) is, for example, an expansion valve. The pressure reduction mechanism (3) reduces the pressure of the refrigerant. The pressure reduction mechanism (3) is an electronic or temperature-sensing expansion valve.

[0043] The four-way switching valve (4) switches the flow direction of the refrigerant in the refrigerant circuit (1a). The four-way switching valve (4) switches between a first state shown by a solid line in Fig. 1 and a second state shown by a dashed line in Fig. 1. In the first state, the four-way switching valve (4) connects the discharge side of the compressor (2) to the gas side of the first heat exchanger (14) and connects the suction side of the compressor (2) to the gas side of the second heat exchanger (34).

[0044] The four-way switching valve (4) in the second state communicates the discharge side of the compressor (2) with the gas side of the second heat exchanger (34), while communicating the suction side of the compressor (2) with the gas side of the first heat exchanger (14).

[0045] <User unit> 3, the usage side unit (30) is, for example, a ceiling-mounted indoor unit. The ceiling-mounted usage side unit (30) includes a ceiling-embedded type in which the usage side unit (30) is embedded in a ceiling surface, and a ceiling-suspended type in which the usage side unit (30) is suspended from an upper wall.

[0046] The utilization side unit (30) includes an indoor casing (31). The indoor casing (31) includes a casing body (31a) and a panel (31b). The casing body (31a) is formed in a rectangular box shape. An opening is formed on the lower side of the casing body (31a).

[0047] The panel (31b) is detachably attached to the opening of the casing body (31a). A suction grille (32) is provided in the center of the panel (31b).

[0048] An air outlet (33) is formed on each of the four side edges of the panel (31b). A flap (39) is disposed inside the air outlet (33).

[0049] The casing body (31a) accommodates a second heat exchanger (34), a second blower (35), and a drain pan (38). The second blower (35) is disposed above the suction grille (32).

[0050] The second blower (35) includes a second fan (36), a second fan motor (37), and a second bellmouth (40). The second fan (36) is, for example, a centrifugal turbofan. The second fan motor (37) drives the second fan (36) to rotate.

[0051] The second heat exchanger (34) is disposed so as to surround the periphery of the second fan (36). The second heat exchanger (34) is, for example, a fin-and-tube type heat exchanger. The drain pan (38) is disposed below the second heat exchanger (34).

[0052] The second bellmouth (40) is disposed between the suction grille (32) and the second fan (36). The second bellmouth (40) has a second peripheral wall portion (41). The second peripheral wall portion (41) is formed in a cylindrical shape. The second peripheral wall portion (41) forms a second air passage (42).

[0053] The second fan (36) transports the indoor air. In Fig. 3, the air flow is indicated by white arrows. The indoor air passes through the suction grille (32) and the second bell mouth (40) and is sucked into the indoor casing (31).

[0054] The indoor air that has passed through the second air passage (42) of the second bellmouth (40) is sucked into an inlet opening that opens downward and in the center of the second fan (36) and is blown out from an outlet opening that opens radially outward of the second fan (36). The air blown out from the outlet of the second fan (36) exchanges heat with the refrigerant as it passes through the second heat exchanger (34). The air that has exchanged heat is supplied to the indoor space from the outlet (33) of the indoor casing (31).

[0055] <Porous part of bellmouth> Incidentally, when air passes through the first air passage (22) of the first bell mouth (20) in the heat source side unit (10), the air in the vicinity of the inner surface of the first circumferential wall portion (21) separates, and a vortex is likely to occur. When a vortex occurs, the flow of the air passing through the first circumferential wall portion (21) becomes significantly turbulent, causing a problem of noise generation.

[0056] Similarly, in the user-side unit (30), when air passes through the second air passage (42) of the second bell mouth (40) in the user-side unit (30), the air in the vicinity of the inner surface of the second circumferential wall portion (41) separates, and a vortex is likely to occur. When a vortex occurs, the flow of the air passing through the second circumferential wall portion (41) becomes significantly turbulent, causing a problem of noise generation.

[0057] In order to solve this problem, it is conceivable to provide a porous portion (50) having a plurality of continuous fine pores in the first peripheral wall portion (21) and the second peripheral wall portion (41), thereby allowing the pressure of the air flowing through the first air passage (22) and the second air passage (42) to escape to the outside of the first peripheral wall portion (21) and the second peripheral wall portion (41).

[0058] Here, for example, when the first bell mouth (20) and the second bell mouth (40) are made of a resin material, it is considered that the porous portion (50) is insert molded into the first peripheral wall portion (21) of the first bell mouth (20) and the second peripheral wall portion (41) of the second bell mouth (40), respectively.

[0059] However, if the porous portion (50) is molded integrally with each of the first bell mouth (20) and the second bell mouth (40), it takes a long time to mold the porous portion (50), resulting in poor production efficiency. In addition, there is a risk that the pores of the porous portion (50) will be crushed by the resin material, or that poor bonding will occur. This results in a problem of the amount of work required to manage the molding conditions for the resin material.

[0060] Therefore, in the present embodiment, it is possible to improve the production efficiency of the air blower (35) including the first bellmouth (20) and the second bellmouth (40) each including the porous portion (50).

[0061] In the following, a mode of attaching the porous portion (50) to the first bell mouth (20) will be described, and a mode of attaching the porous portion (50) to the second bell mouth (40) will not be described since it is similar.

[0062] Note that, since the second bell mouth (40) can also have a configuration similar to that of the first bell mouth (20), in Figures 4 and 5, the symbols for the second circumferential wall portion (41) and the second air passage (42) of the second bell mouth (40) that correspond to the first circumferential wall portion (21) and the first air passage (22) of the first bell mouth (20) are shown in parentheses.

[0063] 4 and 5, the first bell mouth (20) has a first circumferential wall portion (21). The first circumferential wall portion (21) is formed in a cylindrical shape. The first circumferential wall portion (21) defines a first air passage (22).

[0064] The upstream end of the first circumferential wall portion (21) in the air flow direction is formed into a curved cylindrical shape such that the inner diameter decreases from the upstream side to the downstream side. The downstream end of the first circumferential wall portion (21) in the air flow direction is formed into a curved cylindrical shape such that the inner diameter increases from the upstream side to the downstream side.

[0065] The first peripheral wall portion (21) has an opening (51) penetrating therethrough in the thickness direction. The opening (51) is formed in the shape of an elongated hole extending in the circumferential direction. A plurality of openings (51) are provided at intervals in the circumferential direction.

[0066] The porous portion (50) extends in the circumferential direction of the first peripheral wall portion (21). The porous portion (50) is elastically deformable along the peripheral surface of the first peripheral wall portion (21). The porous portion (50) is made of, for example, melamine foam or a sponge material. Note that the material of the porous portion (50) is merely an example and is not limited thereto. The porous portion (50) is made of a porous material having a large number of continuous fine pores. The average diameter of the pores (voids) of the porous portion (50) is, for example, in the range of 15 μm to 300 μm. The porosity of the porous portion (50) (= volume of voids / volume of the entire porous member) is, for example, in the range of 35% to 90%.

[0067] The porous portion (50) is disposed so as to cover the opening (51). The surface of the porous portion (50) is treated to be water repellent. The pores of the porous portion (50) communicate with each other in the thickness direction of the first peripheral wall portion (21). When the porous portion (50) is used outdoors, it is preferable that the porous portion (50) is made of a weather-resistant material or is treated to be weather-resistant.

[0068] A rib portion (52) is provided in the opening (51). The rib portion (52) extends across the opening (51). A plurality of rib portions (52) are provided at intervals in the circumferential direction.

[0069] The first peripheral wall portion (21) has an attachment portion (55). The attachment portion (55) is integrally formed with the first peripheral wall portion (21). The attachment portion (55) attaches the porous portion (50) to the first peripheral wall portion (21). The attachment portion (55) includes a claw portion (56) and a storage portion (57). The claw portion (56) and the storage portion (57) are provided on the outer circumferential surface side of the first peripheral wall portion (21).

[0070] The claw portions (56) engage with the porous portion (50). A pair of the claw portions (56) are provided along the edge of the opening (51) so as to face each other on the upstream side and the downstream side in the air flow direction. The porous portion (50) is held between the pair of claw portions (56) facing each other across the opening (51). A plurality of pairs of the claw portions (56) are provided at intervals in the circumferential direction of the first peripheral wall portion (21).

[0071] The storage sections (57) are disposed at both circumferential ends of the opening section (51). The pair of storage sections (57) are open on the surfaces facing the circumferential ends of the porous section (50). The circumferential ends of the porous section (50) are respectively received in the openings of the pair of storage sections (57).

[0072] In this embodiment, a configuration is assumed in which the porous portion (50) is attached to both the first bell mouth (20) and the second bell mouth (40), but a configuration in which the porous portion (50) is attached to at least one of the first bell mouth (20) and the second bell mouth (40) may also be used.

[0073] <Bellmouth manufacturing method> The procedure for attaching the porous portion (50) to the first bell mouth (20) will be described below. First, the porous portion (50) is arranged so as to cover the opening (51) of the first peripheral wall portion (21) of the first bell mouth (20). At this time, the porous portion (50) is elastically deformed along the peripheral surface of the first peripheral wall portion (21) to bring the porous portion (50) into intimate contact with the first peripheral wall portion (21).

[0074] In the process of positioning the porous portion (50) so as to cover the opening (51), the porous portion (50) may be pushed from the radial outside of the first peripheral wall portion (21) toward between the pair of claw portions (56), or the porous portion (50) may be inserted circumferentially so as to pass between the pair of claw portions (56) from the circumferential outside of the first peripheral wall portion (21).

[0075] In the process of attaching the porous portion (50) to the first peripheral wall portion (21), after the opening portion (51) is covered with the porous portion (50), both circumferential ends of the porous portion (50) are respectively housed in the pair of housing portions (57). In this way, both circumferential ends of the porous portion (50) are attached to the pair of housing portions (57). The porous portion (50) is also sandwiched between the periphery of the opening portion (51) in the first peripheral wall portion (21), the pair of claw portions (56), and the rib portion (52), thereby attaching the porous portion (50) to the first peripheral wall portion (21).

[0076] In this way, the first bellmouth (20) in which the porous portion (50) is attached to the first circumferential wall portion (21) can be manufactured.

[0077] -Effects of the embodiment- In this embodiment, the bellmouth (20, 40) has a peripheral wall portion (21, 41) that forms an air passage (22, 42). The peripheral wall portion (21, 41) has an opening (51) that penetrates in the thickness direction. The porous portion (50) is disposed so as to cover the opening (51). The peripheral wall portion (21, 41) has an attachment portion (55) to which the porous portion (50) is attached.

[0078] In this manner, the porous portion (50) is attached to the peripheral wall portion (21, 41) by the mounting portion (55), thereby improving production efficiency compared to the case where the porous portion (50) is integrally molded with the bellmouth (20, 40).

[0079] In this embodiment, the attachment portion (55) includes a claw portion (56) that engages with the porous portion (50). This allows the porous portion (50) to be easily attached to the peripheral wall portion (21, 41) simply by engaging the porous portion (50) with the claw portion (56). Furthermore, even if the porous portion (50) becomes dirty, it can be easily replaced.

[0080] In this embodiment, the porous portion (50) extends circumferentially around the peripheral wall portion (21, 41), and the mounting portion (55) includes a housing portion (57) that houses an end portion of the porous portion (50) in the circumferential direction. This makes it possible to restrict the end portion of the porous portion (50) from unintentionally shifting.

[0081] In the present embodiment, the peripheral wall portion (21, 41) has a rib portion (52) extending across the opening portion (51). By providing the rib portion (52) in the opening portion (51) in this manner, it is possible to ensure the rigidity of the peripheral wall portion (21, 41) even when the opening portion (51) has a large opening area.

[0082] In addition, the rib portion (52) can prevent the porous portion (50) from protruding from the opening portion (51) to the inner surface side of the peripheral wall portion (21, 41).

[0083] In the present embodiment, the attachment portion (55) is provided on the outer circumferential surface side of the peripheral wall portion (21, 41). By providing the attachment portion (55) on the outer circumferential surface side of the peripheral wall portion (21, 41) in this manner, it is possible to suppress obstruction of the flow of air on the inner circumferential surface side of the peripheral wall portion (21, 41).

[0084] In the present embodiment, the porous portion (50) is elastically deformable along the circumferential surface of the peripheral wall portion (21, 41). As a result, by elastically deforming the porous portion (50) along the circumferential surface of the peripheral wall portion (21, 41), the opening (51) can be covered with the porous portion (50) in a state of being in close contact with the peripheral wall portion (21, 41).

[0085] In the present embodiment, a water-repellent treatment is applied to the surface of the porous portion 50. In this manner, it is possible to prevent mold from growing on the porous portion 50 by making it difficult for moisture to adhere to the porous portion 50.

[0086] In the present embodiment, the pores of the porous portion (50) communicate with each other in the thickness direction of the peripheral wall portion (21, 41). As a result, even in the case of the porous portion (50) that has been subjected to a water-repellent treatment, the pressure of the air flowing through the air passages (22, 42) can be released to the outside of the peripheral wall portion (21, 41) through the pores of the porous portion (50).

[0087] In this embodiment, it is possible to provide a heat source unit (10) including a blower (15), a refrigerant circuit (1a), and a heat exchanger (14).

[0088] In this embodiment, it is possible to provide a utilization side unit (30) including a blower (35), a refrigerant circuit (1a), and a heat exchanger (34).

[0089] In the present embodiment, the opening (51) of the peripheral wall portion (21, 41) is covered with the porous portion (50) and the porous portion (50) is attached to the peripheral wall portion (21, 41). This improves production efficiency compared to the case where the porous portion (50) is integrally molded with the bellmouth (20, 40).

[0090] Other Embodiments The above embodiment may be configured as follows.

[0091] In this embodiment, a configuration has been described in which a first bell mouth (20) is provided on the side wall of the outdoor casing (11) of the heat source unit (10), and air transported by the first fan (16) passes through the first bell mouth (20) and is blown out to the side of the outdoor casing (11), but the present invention is not limited to this configuration.

[0092] For example, a first bell mouth (20) may be provided on the ceiling surface of the outdoor casing (11) of the heat source unit (10), and the air transported by the first fan (16) may pass through the first bell mouth (20) and be blown out above the outdoor casing (11). In this case, a porous portion (50) may be attached to the first peripheral wall portion (21) of the first bell mouth (20) that opens upward.

[0093] Although the embodiments and modifications have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the claims. In addition, the elements of the above embodiments, modifications, and other embodiments may be appropriately combined or substituted. In addition, the descriptions "first," "second," "third," etc. in the specification and claims are used to distinguish the words to which these descriptions are attached, and do not limit the number or order of the words. [Industrial Applicability]

[0094] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for a blower device, a heat source side unit, a utilization side unit, and a method for manufacturing a blower device. [Explanation of symbols]

[0095] 1a Refrigerant circuit 10 Heat source unit 14 1st heat exchanger 15 First air blower 16 First Fan 20 First Bellmouth 21 First peripheral wall section 22 First air passage 30 User unit 34 Second heat exchanger 35 Second blower 36 Second Fan 40 Second Bellmouth 41 Second peripheral wall part 42 Second air passage 50 Porous part 51 Opening 52 Rib section 55 Mounting part 56 Claw part 57 Storage unit

Claims

1. A blower comprising: a fan (16, 36); and a bellmouth (20, 40) having a peripheral wall portion (21, 41) that forms an air passage (22, 42) through which air transported by the fan (16, 36) passes, The peripheral wall portion (21, 41) has an opening (51) penetrating therethrough in a thickness direction, a porous portion (50) arranged to cover the opening (51), the peripheral wall portion (21, 41) has a support portion that prevents the porous portion (50) from protruding from the opening portion (51) toward an inner surface of the peripheral wall portion (21, 41) and an attachment portion (55) to which the porous portion (50) is attached, The porous portion (50) is sandwiched between the support portion and the mounting portion (55). Blower device.

2. In the blower device of claim 1, The support portion is a rib portion (52) extending across the opening (51) on the peripheral wall portion (21, 41). Blower device.

3. In the blower device according to claim 1 or 2, The attachment portion (55) includes a claw portion (56) that engages with the porous portion (50). Blower device.

4. In the blower device according to claim 1 or 2, The porous portion (50) extends circumferentially of the peripheral wall portion (21, 41), The mounting portion (55) includes a receiving portion (57) that receives a circumferential end portion of the porous portion (50). Blower device.

5. In the blower device according to claim 1 or 2, The attachment portion (55) is provided on the outer circumferential surface side of the peripheral wall portion (21, 41). Blower device.

6. In the blower device according to claim 1 or 2, The porous portion (50) is elastically deformable along the peripheral surface of the peripheral wall portion (21, 41). Blower device.

7. In the blower device according to claim 1 or 2, The surface of the porous portion (50) is treated to be water-repellent. Blower device.

8. The blower device according to claim 7, The pores of the porous portion (50) communicate with each other in the thickness direction of the peripheral wall portion (21, 41). Blower device.

9. A blower (15) according to claim 1 or 2; a refrigerant circuit (1a) through which a refrigerant flows; a heat exchanger (14) provided in the refrigerant circuit (1a) for exchanging heat between the refrigerant flowing through the refrigerant circuit (1a) and air transported by the air blower (15). Heat source unit.

10. A blower (35) according to claim 1 or 2; a refrigerant circuit (1a) through which a refrigerant flows; a heat exchanger (34) provided in the refrigerant circuit (1a) for exchanging heat between the refrigerant flowing through the refrigerant circuit (1a) and air transported by the air blower (35). User unit.

11. A method for manufacturing an air blower including a fan (16, 36) and a bellmouth (20, 40) having a peripheral wall portion (21, 41) that forms an air passage (22, 42) through which air transported by the fan (16, 36) passes, comprising the steps of: The peripheral wall portion (21, 41) has an opening (51) penetrating therethrough in a thickness direction, disposing a porous portion (50) so as to cover the opening (51) from a circumferential or radial outer side of the peripheral wall portion (21, 41); and attaching the porous portion (50) to the peripheral wall portion (21, 41). A method for manufacturing a blower.

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