Outdoor unit and refrigeration unit

Abstract

An outdoor unit according to an embodiment of the present disclosure comprises a fan grille covering an outlet opening on the outside of a housing. The fan grille comprises an opposing section facing the outlet opening and an outer frame projecting from an outer circumference of the opposing section to the housing. The opposing section comprises several first crossbars extending in a first direction and several second crossbars extending in a second direction and intersecting the first crossbars. Several first ventilation holes, separated by the several first crossbars and the several second crossbars, are formed on the opposing section.The outer frame includes an extension that extends in a cutting direction intersecting the axial direction. This extension comprises several third cross members spaced apart in the cutting direction. Second ventilation holes are formed on the extension between each pair of third cross members adjacent in the cutting direction. The flow direction area of ​​the second ventilation hole is smaller than the flow direction area of ​​the first ventilation hole. The largest dimension of each of the third cross members in the cutting direction is larger than the largest dimension of each of the first cross members in the second direction and larger than the largest dimension of each of the second cross members in the first direction.

Description

Technical area

[0001] The present disclosure relates to an outdoor unit and a refrigeration circuit unit. background

[0002] As shown, for example, in patent document 1, an outdoor unit is known which is an outdoor unit of an air conditioning system (refrigeration circuit unit) which includes a fan guard (fan grille). Citation list of patent documents

[0003] Patent document 1: Unexamined Japanese patent application, first publication number 2016 - 130 616 Brief description of the invention Problem to be solved by the invention

[0004] As disclosed in patent document 1, the above-mentioned outdoor unit has ventilation holes on the sides of the fan guard to reduce its ventilation resistance. In such cases, there is a risk that air exiting these ventilation holes will be drawn back into the outdoor unit, a phenomenon known as "short-circuiting." Because the air exiting the ventilation holes has already undergone heat exchange with a refrigerant flowing within a heat exchanger, this re-entry of the air through the heat exchanger inhibits the evaporation and / or condensation of the refrigerant and reduces the heat exchange efficiency of the outdoor unit.

[0005] The present disclosure was made in consideration of the aforementioned problem, and one of its objectives is to provide an outdoor unit which causes a reduction in the ventilation resistance of a fan grille and which has a design configured to prevent the occurrence of the short-circuit phenomenon, and to provide an air conditioning system which includes such an outdoor unit. Means to solve the problem

[0006] One embodiment of an outdoor unit according to the present disclosure is an outdoor unit of a refrigeration circuit device comprising a housing including an outlet opening, a blower fan comprising a rotor arranged on the inside of the housing facing the outlet opening, and a fan grille covering the outlet opening from an outside of the housing. The fan grille comprises an opposing section arranged facing the outlet opening in an axial direction along the axis of rotation of the rotor, and an outer frame projecting from an outer circumference of the opposing section to the housing.The opposite section comprises: several first cross braces extending in a first direction intersecting the axial direction and spaced apart in a second direction intersecting both the axial and first directions; and several second cross braces extending in the second direction and intersecting the first cross braces in the second direction and spaced apart in the first direction. Several first ventilation openings, separated by the several first and second cross braces, are formed on the opposite section. The outer frame includes an extension extending in a direction intersecting the axial direction. The extension comprises several third cross braces spaced apart in the direction of intersection.At each of the extensions, second ventilation holes are formed between each pair of adjacent third crossbars in the cutting direction. The flow direction area of ​​the second ventilation hole is smaller than the flow direction area of ​​the first ventilation hole. The largest dimension of each of the third crossbars in the cutting direction is larger than the largest dimension of each of the first crossbars in the second direction and larger than the largest dimension of each of the second crossbars in the first direction.

[0007] A refrigeration circuit unit according to the present disclosure comprises the above outdoor unit. Effects of the invention

[0008] According to the present disclosure, it is possible in an outdoor unit of a refrigeration circuit device to cause a decrease in the ventilation resistance of a fan grille, thereby preventing the occurrence of a short-circuit phenomenon. Brief description of drawings Fig. 1 A schematic diagram showing a configuration overview of a refrigeration circuit device according to a first embodiment. Fig. 2 A perspective view showing an outdoor unit according to the first embodiment. Fig. 3 An exploded view showing the outdoor unit according to the first embodiment. Fig. 4 A partial cross-sectional view showing part of the outdoor unit from above according to the first embodiment. Fig. 5 A partial cross-sectional view showing part of the outdoor unit from the left view according to the first embodiment. Fig. 6 A view showing part of an opposite section from the front view according to the first embodiment. Fig. 7 An exploded view showing part of the opposite section according to the first embodiment. Fig. 8 A view showing a section of the opposite section according to the first embodiment and a cross-sectional view along line VIII-VIII in Fig. 6 is. Fig. 9 A view showing a section of the opposite section according to the first embodiment and a cross-sectional view along line IX - IX in Fig. 6 is. Fig. 10 A view showing a section of a housing and a section of a frame side from the left. Fig. 11 A view showing a section of the frame side according to the first embodiment and a cross-sectional view along line XI-XI in Fig. 10 is. Fig. 12 A partial cross-sectional view showing the outdoor unit from above according to a second embodiment. Fig. 13 A view showing a section of the outdoor unit from the left according to the second embodiment. Description of embodiments

[0009] The following sections explain embodiments of the present disclosure with reference to the drawings. The scope of the present disclosure is not limited to the embodiments shown below, and embodiments may be modified as long as they do not deviate from the technical scope of the present disclosure. Scales, sizes, or the like of the various embodiments in the drawings below may differ from actual scales and sizes to facilitate a better understanding of the various embodiments.

[0010] The drawings show an X-axis, a Y-axis, and a Z-axis. The X-axis shows one side of a page in a horizontal direction. The Y-axis shows the other side of a page in the horizontal direction. The Z-axis shows a vertical direction Z. In the explanations below, the horizontal direction along the X-axis is referred to as the "front-to-back direction X," a horizontal direction along the Y-axis is referred to as the "left-to-right direction Y," and a vertical direction Z along the Z-axis is referred to as the "vertical direction Z." The front-to-back direction X, the left-to-right direction Y, and the vertical direction Z are directions that are orthogonal to each other.In the explanations below, a side of the vertical direction Z toward which an arrow of the Z-axis points is referred to as "above" (+Z-side), and a side of the vertical direction Z that faces away from a side toward which the arrow of the Z-axis points is referred to as "below" (-Z-side). A side of the front-back direction X toward which an arrow of the X-axis points is "front" (+X-side), and a side of the front-back direction X that faces away from a side toward which the arrow of the X-axis points is "back" (-X-side). The left-right direction Y in each of the embodiments below is a left-right direction as viewed from the front (+X-side) of the outdoor unit in the embodiments below.In other words, a side of the left-right direction Y towards which an arrow of the Y-axis is directed is "right" (+Y-side), and a side of the left-right direction Y away from a side towards which the arrow of the Y-axis is directed is "left" (-Y-side).

[0011] In the embodiments shown below, the vertical direction Z is a "first direction," and the left-right direction Y is a "second direction." Left (-Y side) corresponds to a "primary side in the second direction," and right (+Y side) corresponds to a "secondary side in the second direction." First embodiment

[0012] Fig. Figure 1 is a schematic diagram showing a configuration overview of a refrigeration circuit unit 100 according to a first embodiment. The refrigeration circuit unit 100 is a device with a refrigeration circuit that circulates a refrigerant 19. The refrigeration circuit unit 100 according to the first embodiment is an air conditioner. As shown in Fig. As shown in Figure 1, the refrigeration unit 100 comprises an outdoor unit 10, an indoor unit 20, and a circulation path 18. The outdoor unit 10 is located in an outdoor space. The indoor unit 20 is located in an indoor space. Both the outdoor unit 10 and the indoor unit 20 are connected to each other by the circulation path 18, which circulates the refrigerant 19. The outdoor unit 10 and the indoor unit 20 are heat exchange units that perform a heat exchange with air.

[0013] The refrigeration unit 100 is designed to adjust the temperature of the air in the interior by performing a heat exchange between the refrigerant 19, which flows within the circulation path 18, and the interior, where the indoor unit 20 is located. Examples of refrigerants flowing through the circulation path 18 include a fluorine-based refrigerant with a low global warming potential (GWP), a hydrocarbon-based refrigerant, or the like. Examples of refrigerants flowing through the circulation path 18 include a single refrigerant, such as R1234YF, R1234ZE, R32, and R290; a blend containing two or more of the aforementioned refrigerants; or a blend containing an additional refrigerant mixed with the aforementioned refrigerants.Refrigerant 19 could, for example, be a mixed refrigerant containing R1132(E) or a mixed refrigerant containing R1123. Refrigerant 19 could also be a refrigerant that is a combination of R516A, R445A, R444A, R454C, R444B, R454A, R455A, R457A, R459B, R452B, R454B, R447B, R447A, R446A, and R459A.

[0014] The outdoor unit 10 comprises a housing 11, a compressor 12, a heat exchanger 13, a flow-adapting valve 14, a blower fan 15, a four-way valve 16 and a controller 17. The compressor 12, the heat exchanger 13, the flow-adapting valve 14, the blower fan 15, the four-way valve 16 and the controller 17 are housed inside the housing 11.

[0015] The compressor 12, the heat exchanger 13, the flow-adjusting valve 14, and the four-way valve 16 are provided on a section of the circulation path 18 located inside the housing 11. The compressor 12, the heat exchanger 13, the flow-adjusting valve 14, and the four-way valve 16 are connected by this section of the circulation path 18 located inside the housing 11.

[0016] The four-way valve 16 is provided on a portion of the circulation path 18 connected to an outlet side of the compressor 12. By replacing a section of the circulation path 18, the four-way valve 16 can reverse the flow direction of the refrigerant 19 within the circulation path 18. If the path connected by the four-way valve 16 is the path of the four-way valve 16 which is in Fig. As shown by solid lines 1, the refrigerant 19 flows within the circulation path 18 in the direction which is shown in Fig. 1 is shown by the arrow with the solid line. If, on the other hand, the path connected by the four-way valve 16 is the path of the four-way valve 16 which is in Fig. As shown by the dashed lines, the refrigerant 19 flows within the circulation path 18 in the direction which is shown in Fig. 1 is shown by the arrow with a dashed line.

[0017] The indoor unit 20 comprises a housing 21, a heat exchanger 22, and a blower fan 23. The housing 21 contains the heat exchanger 22 and the blower fan 23. The indoor unit 20 is configured to operate in a cooling mode, cooling the indoor air where the indoor unit 20 is located, and in a heating mode, heating the indoor air where the indoor unit 20 is located.

[0018] When the indoor unit 20 is operating in cooling mode, the refrigerant 19, which flows within the circulation path 18, flows in the direction which is in Fig. 1 is shown by solid lines. In other words, when the indoor unit 20 is operating in cooling mode, the refrigerant 19, which flows within the circulation path 18, circulates so that it returns to the compressor 12 after passing through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow-adapting valve 14, and the heat exchanger 22 of the indoor unit 20 in that order. During cooling operation, the heat exchanger 13 inside the outdoor unit 10 functions as a condenser, and the heat exchanger 22 inside the indoor unit 20 functions as an evaporator.

[0019] On the other hand, when the indoor unit 20 is operating in heating mode, the refrigerant 19, which flows within the circulation path 18, flows in the direction which is in Fig. 1 is shown by dashed lines. In other words, when the indoor unit 20 is operating in heating mode, the refrigerant 19, which flows within the circulation path 18, circulates so that it returns to the compressor 12 after having flowed through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow-adapting valve 14, and the heat exchanger 13 of the outdoor unit 10 in that order. During heating mode, the heat exchanger 13 inside the outdoor unit 10 functions as the evaporator, and the heat exchanger 22 inside the indoor unit 20 functions as the condenser.

[0020] Next, outdoor unit 10 will be explained in more detail. Fig. Figure 2 is a perspective view showing the outdoor unit 10. Fig. Figure 3 is an exploded view showing the outdoor unit 10. Fig. Figure 4 is a partial cross-sectional view showing part of the outdoor unit 10 from a top view. Fig. Figure 5 is a partial cross-sectional view showing part of the outdoor unit 10 from the left (-Y side) perspective.

[0021] As in Fig. 2 to Fig. As shown in Figure 5, the housing 11 of the outdoor unit 10 is essentially a rectangular box, which is Y long in the left-right direction. As shown in Fig. As shown in Figure 4, the interior of the housing 11 is divided in the left-right direction Y into a blower compartment 11a and a mechanics compartment 11b. The heat exchanger 13 and the blower fan 15 are located inside the blower compartment 11a. The compressor 12 is located inside the mechanics compartment 11b.

[0022] As in Fig. 4 and Fig. As shown in Figure 5, the housing 11 has intake openings 11c and 11d for drawing in air AF. Intake opening 11c is formed on a rear wall 11f, which is located on the rear (-X-side) wall of the walls that form the housing 11. Intake opening 11c penetrates the rear wall 11f in the front-to-back direction X. Several of the intake openings 11c can, for example, be formed as a grid.

[0023] The receiving opening 11d is formed on a side wall 11g, which is located on the left (-Y-side) wall of the walls that form the housing 11. The receiving opening 11d penetrates the side wall 11g in the left-right direction Y. As shown in Fig. 2 and Fig. As shown in Figure 3, several receiving apertures 11d are formed. The multiple receiving apertures 11d in the example of Fig. 2 and the Fig. Three are rectangles that are Z long in the vertical direction. In the example of the Fig. 2 and the Fig. 3 Three rows of receiving openings 11d are provided with intervals between them in the vertical direction Z, each row having four receiving openings 11d which are aligned in the front-back direction X with intervals between them.

[0024] As in Fig. As shown in Figure 3, the housing 11 includes an outlet opening 11e through which the air AF exits. The outlet opening 11e is formed by a front wall 11h, which is arranged on the front (+X-side) wall of the walls that form the housing 11. In other words, the outdoor unit 10 according to the first embodiment is an outdoor unit in which the outlet opening 11e for the air AF is a side-blown type formed on the front wall of the housing 11. The outlet opening 11e penetrates the front wall 11h in the front-to-back direction X and is open to the front. The outlet opening 11e according to the first embodiment has a circular shape with a rotation axis R, which will be referred to later, as its center. The outlet opening 11e is formed using the opening on the front of a cylindrical channel wall 11j, which is attached to a housing main body 11i in the shape of an essentially rectangular box. The channel wall 11j is in 。 Fig. 4 and Fig. 5 omitted.

[0025] As in Fig. As shown in Figure 4, the heat exchanger 13, according to the first embodiment, has essentially an L-shape when viewed from the vertical direction Z. The heat exchanger 13 comprises a main body 13c. According to the first embodiment, a single main body 13c is provided. The main body 13c comprises a first heat exchanger 13a, which extends in the left-right direction Y, and a second heat exchanger 13b, which extends forward (+X-side) from a left (-Y-side) end of the first heat exchanger 13a. The first heat exchanger 13a is arranged such that it faces the multiple receiving openings 11c from the front (+X-side). The second heat exchanger 13b is arranged such that it faces the multiple receiving openings 11d from the right (+Y-direction).

[0026] The blower fan 15 according to the first embodiment is a propeller fan. The blower fan 15 is arranged upstream (+X direction) of the heat exchanger 13. In particular, the blower fan 15 is arranged upstream of the first heat exchanger 13a and to the right (+Y direction) of the second heat exchanger 13b. The blower fan 15 comprises a rotor 15a, which is rotatable about the axis of rotation R, which extends in the front-back direction X. The rotor 15a is rotated about the axis of rotation R by means of a motor 15b. The axis of rotation R is an imaginary axis extending in the front-back direction X. In other words, in the first embodiment, one axial direction of the axis of rotation R is the front-back direction X.In the explanations below, there are cases where the axial direction of the axis of rotation R is simply referred to as the "axial direction," and a radial direction whose center is the axis of rotation R is referred to as a "radial direction." A circumferential direction of the axis of rotation R is simply referred to as a "circumferential direction."

[0027] The rotor 15a is positioned facing the outlet opening 11e inside the housing 11. From the front (+X direction) view, the entire rotor 15a is located further inward than an inner edge of the outlet opening 11e. The rotor 15a is positioned behind (-X direction) the outlet opening 11e. When the rotor 15a rotates, air AF is drawn into the interior of the housing 11 through the multiple intake openings 11c formed on the rear wall 11f and the multiple intake openings 11d formed on the side wall 11g. The air AF drawn into the interior of the housing 11 by means of the rotor 15a flows through the heat exchanger 13 and the rotor 15a and exits through the outlet opening 11e in front of the housing 11.

[0028] As in Fig. 2 to Fig. As shown in Figure 5, the outdoor unit 10 includes a fan grille 30, which covers the outlet opening 11e from the outside of the housing 11. The fan grille 30 is an element provided to prevent a person's hand from coming into contact with the rotor 15a. The fan grille 30 is attached to the housing 11. The fan grille 30 is attached to the housing 11, for example, using screws. The fan grille 30 can also be attached to the housing 11, for example, using locking clips.

[0029] As in Fig. As shown in Figure 3, the fan grille 30 of the first embodiment has a rectangular shape with two sides extending in the left-right direction Y and two sides extending in the vertical direction Z, from the front-back direction X. In particular, the fan grille 30 is essentially square from the front-back direction X. The fan grille 30 of the first embodiment is thin in the front-back direction X and is essentially a box open to the rear (-X side). The fan grille 30 covers the entire outlet opening 11e from the front (+X direction). In the first embodiment, the center of the fan grille 30 in the vertical direction Z is located at the same position as the axis of rotation R in the vertical direction Z.In the fan grille 30, the side in the axial direction (the front-back direction X) on which the housing 11 is arranged is at the rear (-X-side), and the side opposite the side in the axial direction on which the housing 11 is arranged is at the front (+X-side).

[0030] The fan grille 30 comprises an opposing section 31 and an outer frame 36. The opposing section 31 faces the outlet opening 11e in the axial direction of the axis of rotation R, in other words, in the front-to-back direction X. The opposing section 31 is located in front of (+X direction) the outlet opening 11e. The axis of rotation R passes through the opposing section 31. The opposing section 31 has a rectangular shape, with two sides extending in the left-right direction Y and two sides extending in the vertical direction Z. As shown in Fig. As shown in Figure 2, an outer circumferential edge of the opposite section 31 is arranged further towards an outer radial direction than the outlet opening 11e. A dimension of the opposite section 31 in the left-right direction Y is larger than a dimension of the outlet opening 11e in the left-right direction Y, in other words, larger than the inner diameter of the outlet opening 11e. The dimension of the opposite section 31 in the vertical direction Z is larger than the dimension of the outlet opening 11e in the vertical direction Z, in other words, larger than the inner diameter of the outlet opening 11e.

[0031] Fig. Figure 6 is a view showing part of the opposite section 31 from a front view. Fig. Figure 7 is an exploded view showing part of the opposite section 31. Fig. Figure 8 is a view showing a section of the opposite section 31 and a cross-sectional view along line VIII-VIII in Fig. 6 is. Fig. Figure 9 is a view showing a section of the opposite section 31 and a cross-sectional view along line IX-IX in Fig. 6 is.

[0032] As in Fig. As shown in Figure 6, the opposite section 31 comprises several first crossbars 61 and several second crossbars 62. The several first crossbars 61 extend in the vertical direction Z, which intersects the axial direction (front-back direction X). The several first crossbars 61 are arranged with intervals between them in the left-right direction Y, which intersects the axial direction (front-back direction X) and the vertical direction Z. The several second crossbars 62 extend in the left-right direction Y and intersect the several first crossbars 61. The several second crossbars 62 are arranged with intervals between them in the vertical direction Z. The distance between a pair of second crossbars 62 that are adjacent in the vertical direction Z is greater than the distance between a pair of first crossbars 61 in the left-right direction Y. The number of second crossbars 62 is less than the number of first crossbars 61.

[0033] As in Fig. 7 and Fig. As shown in Figure 8, the cross-sectional shape of a first cross member 61 is an ellipse whose long axis extends in the axial direction (front-back direction X) in the cross-section that is orthogonal to the vertical direction Z. As shown in Fig. As shown in Figure 8, the surface (-X-side) of the first cross members 61 on the side in the axial direction (front-back direction X) on which the housing 11 is arranged, in other words a rear surface 61a, is a curved surface projecting towards the housing 11. The rear surface 61a is essentially a semi-elliptical arc projecting rearward (-X-side) from the perspective of the vertical direction Z. A surface of the first cross member 61, which is arranged on a side (+X-side) opposite the side in the axial direction (front-back direction X) on which the housing 11 is arranged, in other words a front surface 61b, is a curved surface projecting in the direction away from the housing 11. The front surface 61b is essentially a semi-arc projecting forward (+X-side) from the perspective of the vertical direction Z.

[0034] As in Fig. As shown in Figure 9, the cross-sectional shape of the second cross member 62 is essentially a trapezoid with a dimension in the vertical direction Z that decreases towards the rear (-X side), in a cross-section that is orthogonal to the left-right direction Y. The surface of the second cross member 62 on the side (-X side) in the axial direction on which the housing 11 is arranged, in other words the rear surface 62a, is a curved surface that projects towards the housing 11. The rear surface 62a is essentially a semicircle that projects rearward (-X side) from the perspective of the left-right direction Y. A surface in the front-back direction X of the second cross member 62 on the side (+X side) opposite the side on which the housing 11 is arranged, in other words a front surface 62b, is a flat surface.The front surface 62b is a flat surface which is directed forward (+X-side) and is orthogonal to the left-right direction Y.

[0035] An upper surface of the second cross member 62, in other words an upper surface 62c, is an inclined surface inclined in the vertical direction Z with respect to a flat surface (XY plane) that is orthogonal to the vertical direction Z. The upper surface 62c is arranged downwards towards the rear (-X side). The upper surface 62c is connected to an upper end of the rear surface 62a and an upper end of the front surface 62b. A lower surface of the second cross member 62, in other words a lower surface 62d, is an inclined surface inclined in the vertical direction Z with respect to the flat surface (XY plane) that is orthogonal to the vertical direction Z. The lower surface 62d is arranged upwards towards the rear. The lower surface 62d is connected to a lower end of the rear surface 62a and a lower end of the front surface 62b.The upper surface 62c and the lower surface 62d are inclined in the vertical direction Z, while the upper surface 62c and the lower surface 62d extend backwards.

[0036] In the first embodiment, L2, which is the largest axial dimension (front-back direction X) of the second cross member 62, is smaller than L1, which is the largest axial dimension (front-back direction X) of the first cross member 61. In other words, the largest axial dimension L1 of the first cross member 61 is larger than the largest axial dimension L2 of the second cross member 62. The largest axial dimension L1 of the first cross member 61 is equal to the long diameter of a cross-section of the first cross member 61, which is an ellipse. The largest axial dimension L2 of the second cross member 62 is equal to the axial distance between the apex of the arcuate rear surface 62a and the front surface 62b, measured along the left-right direction Y.In the first embodiment, the largest dimension L1 of the first crossbar 61 in the axial direction is greater than or equal to twice the largest dimension L2 of the second crossbar 62 in the axial direction.

[0037] The second cross member 62 according to the first embodiment is connected to a rear (-X-side) section of the first cross member 61. A front (+X-side) end of the second cross member 62 is positioned further rearward than a front end of the first cross member 61. The front end of the second cross member 62 according to the first embodiment is the front surface 62b. In other words, the front surface 62b is located in the front-back direction X at the same position in the axial direction (front-back direction X) as a center CL1 of the first cross member 61. A rear end of the second cross member 62 is positioned further forward than a rear end of the first cross member 61.

[0038] As in Fig. As shown in Figure 7, W2, which is the largest dimension of the second cross member 62 in the vertical direction Z, is smaller than W1, which is the largest dimension of the first cross member 61 in the left-right direction Y. The largest dimension W2 of the second cross member 62 in the vertical direction Z is equal to the dimension of the front surface 62b in the vertical direction Z. The largest dimension W1 of the first cross member 61 in the left-right direction Y is equal to a dimension at the center of the axial direction (front-back direction X) of the first cross member 61 in the left-right direction Y.

[0039] As in Fig. As shown in Figure 6, the opposite section 31 is formed in a grid shape by the intersecting arrangement of several first crossbars 61 and several second crossbars 62. Several first ventilation holes 41, separated by the several first crossbars 61 and the second crossbars 62, are formed on the opposite section 31. Each of the first ventilation holes 41 is a hole formed by being surrounded by pairs of first crossbars 61 adjacent in the left-right direction Y and by pairs of second crossbars 62 adjacent in the vertical direction Z. The first ventilation holes 41 penetrate the opposite section 31 in the front-back direction X. In the first embodiment, each of the several first ventilation holes 41 is an elongated rectangle that is longer in the vertical direction Z. The several first ventilation holes 41 are arranged as a matrix.In particular, several rows of a series of the first ventilation holes 41 are formed in the left-right direction Y and aligned in the vertical direction Z.

[0040] As in Fig. As shown in Figure 3, the outer frame 36 projects from the outer circumference of the opposite section 31 towards the housing 11. In the first embodiment, the outer frame 36 is a rectangular frame that projects rearward (-X-side) from the outer circumference of the opposite section 31. A rear end of the outer frame 36 is attached to the front wall 11h of the housing 11. Although omitted in the drawings, a fastening section, which is attached to the housing 11 using screws, is provided in the outer frame 36. The outer frame 36 comprises a frame top 32, a frame bottom 33, and two frame sides 34 and 35.

[0041] The upper frame section 32 is a section of the outer frame 36 arranged at the top in the vertical direction Z. The upper frame section 32 is arranged further up in the vertical direction Z than the axis of rotation R. The lower frame section 33 is a section of the outer frame 36 arranged at the bottom in the vertical direction Z. The lower frame section 33 is arranged further down in the vertical direction Z than the axis of rotation R. The upper frame section 32 and the lower frame section 33 extend in a direction which, from the perspective of the axial direction of the axis of rotation R, in other words, the front-back direction X, intersects the vertical direction Z. In particular, the upper frame section 32 and the lower frame section 33 extend in the left-right direction Y. The upper frame section 32 and the lower frame section 33 are arranged such that they face each other in the vertical direction Z with a gap between them.The upper frame part 32 and the lower frame part 33 are plates which have surfaces which face the vertical direction Z.

[0042] The two frame sides 34 and 35 are sections arranged in the left-right direction Y, which is orthogonal to both the vertical direction Z and the axial direction of the axis of rotation R (front-back direction X). The two frame sides 34 and 35 extend in the vertical direction Z. The two frame sides 34 and 35 are arranged so that they face each other in the left-right direction Y with a gap between them. Frame side 34 is a right (+Y-side) section of the outer frame 36. Frame side 35 is the left (-Y-side) section of the outer frame 36. Frame side 34 is connected to a right end of the upper frame section 32 and a right end of the lower frame section 33. Frame side 35 is connected to a left end of the upper frame section 32 and a left end of the lower frame section 33.The two frame sides 34 and 35 are plates which have surfaces facing the left-right direction Y.

[0043] In the first embodiment, the frame base 33 and the two frame sides 34 and 35 are each extensions 37 that extend in a cutting direction that intersects the axial direction of the axis of rotation R. In other words, the first embodiment provides multiple extensions 37. The frame base 33 is an extension 37 that extends in the left-right direction Y. The two frame sides 34 and 35 are the extensions 37 that extend in the vertical direction Z. The "cutting direction" that intersects the axial direction of the axis of rotation R of the frame base 33 is the left-right direction Y. The "cutting direction" that intersects the axial direction of the axis of rotation R of the two frame sides 34 and 35 is the vertical direction Z.

[0044] Fig. Figure 10 is a view showing a section of the housing 11 and a section of the frame side 35 from the left (-Y-side) view. Fig. 11 is a view showing a section of frame side 35 and a cross-sectional view along line XI-XI in Fig. 10 is. As in Fig. As shown in Figure 10, the frame side 35 comprises several third crossbars 63c, which are arranged in the vertical direction Z with intervals between them. The several third crossbars 63c extend in the front-back direction X.

[0045] As in Fig. As shown in Figure 11, a cross-section of a third cross member 63c is a rectangle with two sides extending in the vertical direction Z and two sides extending in the left-right direction Y, at a cross-section orthogonal to the left-right direction Y. A surface of the third cross member 63c, which faces an interior (+Y-side) of the outer frame 36, in other words an interior surface 63d, is a flat surface. The interior surface 63d of the third cross member 63c, which faces the interior of the outer frame 36, is a right-facing (+Y-side) surface of the frame side 35. The interior surface 63d is a flat surface that is orthogonal to the left-right direction Y. A surface of the third cross member 63c, which faces an outside (-Y-side) of the outer frame 36, in other words an outer surface 63e, is a flat surface.The outer surface 63e of the third cross member 63c, which faces the outside of the outer frame 36, is a left-facing (-Y-side) surface of the frame side 35. An upward-facing surface of the third cross member 63c, in other words an upper surface 63f, is a flat surface. A downward-facing surface of the third cross member 63c, in other words a lower surface 63g, is a flat surface. The upper surface 63f and the lower surface 63g are flat surfaces that are orthogonal to the vertical direction Z.

[0046] In the first embodiment, a dimension of the third cross member 63c in the vertical direction Z is the same over its entire dimension in the left-right direction Y. W3, which is the largest dimension of the third cross member 63c in the vertical direction Z, is larger than W1, which is the largest dimension of the first cross member 61 in the left-right direction Y, and than W2, which is the largest dimension of the second cross member 62 in the vertical direction Z. The largest dimension W3 of the third cross member 63c in the vertical direction Z is equal to the dimensions of the inner surface 63d and the outer surface 63e in the vertical direction Z.L3, which is the largest dimension of the third cross member 63c in the left-right direction Y, intersecting both the axial direction (front-back direction X) and the vertical direction Z, which is the direction of intersection, is smaller than the largest dimension L1 of the first cross member 61 in the front-back direction X and smaller than the largest dimension L2 of the second cross member 62 in the front-back direction X. The largest dimension L3 of the third cross member 63c in the left-right direction Y is equal to the dimensions of the upper surface 63f and the lower surface 63g in the left-right direction Y.

[0047] The largest dimension L3 of the third cross member 63c in the left-right direction Y can be larger than the largest dimension L1 of the first cross member 61 in the front-back direction X and larger than the largest dimension L2 of the second cross member 62 in the front-back direction X, can be equal to the largest dimension L1 of the first cross member 61 in the front-back direction X or equal to the largest dimension L2 of the second cross member 62 in the front-back direction X, or can be larger than the largest dimension L2 of the second cross member 62 in the front-back direction X, while being smaller than the largest dimension L1 of the first cross member 61 in the front-back direction X.

[0048] Between each pair of the third crossbars 63c, which are adjacent to each other in the vertical direction Z, second ventilation holes 42c of the frame side 35 are formed. The second ventilation holes 42c are arranged so that they are aligned in the vertical direction Z with intervals between them. As in Fig. As shown in Figure 10, the second ventilation holes 42c according to the first embodiment are long rectangular holes extending in the axial direction (front-back direction X). In the frame side 35, a center CL2 of a second ventilation hole 42c is arranged in the axial direction such that it is axially offset from a center CL3 of the frame side 35 relative to a side (-X-side) on which the housing 11 is arranged, in other words, to the rear.

[0049] The flow direction area of ​​the second ventilation hole 42c is smaller than the flow direction area of ​​the first ventilation hole 41. The flow direction area of ​​the first ventilation hole 41 is the area of ​​the first ventilation hole 41 when viewed from the axial direction (front-to-back direction X). The flow direction area of ​​the second ventilation hole 42c is the area of ​​the second ventilation hole 42c when viewed from the left-to-right direction Y.

[0050] A dimension Lx2 of the second ventilation hole 42c in the axial direction (front-back direction X) is larger than a dimension Lz2 of the second ventilation hole 42c in the vertical direction Z. The dimension Lx2 of the second ventilation hole 42c in the axial direction is smaller than a dimension Lz1 of the first ventilation hole 41 in the vertical direction Z. The dimension Lz2 of the second ventilation hole 42c in the vertical direction Z is smaller than a dimension Ly1 of the first ventilation hole 41 in the left-right direction Y. The dimension Lz2 of the second ventilation hole 42c in the vertical direction Z is equal to a distance between a pair of the third crossbars 63c that are adjacent to each other in the vertical direction Z. As in Fig. As shown in Figure 6, the dimension Lz1 of the first ventilation hole 41 in the vertical direction Z is equal to the distance between a pair of the second crossbars 62 that are adjacent to each other in the vertical direction Z. The dimension Ly1 of the first ventilation hole 41 in the left-right direction Y is equal to the distance between a pair of the first crossbars 61 that are adjacent to each other in the left-right direction Y.

[0051] As in Fig. As shown in Figure 3, frame side 34 has the same configuration as frame side 35, except that it is arranged symmetrically to frame side 35 in the left-right direction Y. Frame side 34 comprises several third cross members 63b extending in the front-back direction X. These third cross members 63b are arranged vertically Z with intervals between them. Between each pair of third cross members 63b adjacent to each other in the vertical direction Z, second ventilation holes 42b of frame side 34 are formed. On frame side 34, the surfaces of the third cross members 63b facing the interior of the outer frame 36 are surfaces oriented to the left (-Y side).

[0052] The frame lower section 33 has the same configuration as the frame side 35, except that it is arranged counterclockwise by 90° around the center of the axis of rotation R with respect to the frame side 35 when viewed from the front (+X-side). The frame lower section 33 comprises several third cross members 63a extending in the front-to-back direction X. The several third cross members 63a are arranged in the left-to-right direction with gaps between them. Each pair of third cross members 63a of the frame lower section 33 that are adjacent to each other in the left-to-right direction Y forms a second ventilation hole 42a between them. In the frame lower section 33, a surface of the third cross member 63a facing the interior of the outer frame 36 is an upward-facing surface.

[0053] Unless otherwise specified, the third crossbars 63a, 63b, and 63c are referred to collectively as "third crossbars 63" in the explanations below. Similarly, unless otherwise specified, the second ventilation hole 42a, 42b, and 42c are referred to collectively as "second ventilation hole 42".

[0054] The upper frame part 32 according to the first embodiment differs from the lower frame part 33 and the two frame sides 34 and 35 in that it does not have any ventilation holes. Therefore, the air AF does not flow through the upper frame part 32. The second ventilation holes 42 can also be formed on the upper frame part 32, as with the lower frame part 33 and the two frame sides 34 and 35, etc.

[0055] The fan grille 30 according to the first embodiment is made of resin. The fan grille 30 can also be injection-molded using a metal mold. The opposing section 31, the upper frame part 32, the lower frame part 33, and the two frame sides 34 and 35 are formed in one piece. The material from which the fan grille 30 is formed is not specifically limited. The fan grille 30 can be made of a metal.

[0056] According to the first embodiment, the fan grille 30 comprises the opposite section 31, which is arranged such that it faces the outlet opening 11e in the axial direction (front-to-back direction X) of the rotation axis R of the rotor 15a, and the outer frame 36, which is arranged such that it faces the housing 11 from the outer circumference of the opposite section 31. The opposite section 31 comprises the multiple first crossbars 61, which extend in the vertical direction Z, which intersects the axial direction, and are arranged with a distance between them in the left-right direction Y, which intersects both the axial direction and the vertical direction Z, and comprises the multiple second crossbars 62, which intersect the multiple first crossbars 61, extend in the left-right direction Y, and are arranged with a distance between them in the vertical direction Z.The multiple divided first ventilation holes 41 are formed in the opposite section 31 by the multiple first crossbars 61 and the multiple second crossbars 62. The outer frame 36 includes the extension 37, which extends in the cutting direction intersecting the axial direction. The extension 37 includes the multiple third crossbars 63, which are arranged with a distance between them in the cutting direction intersecting the axial direction. Between each pair of third crossbars 63 that are adjacent to each other in the cutting direction, the second ventilation hole 42 of the extension 37 is formed. The flow direction area of ​​the second ventilation hole 42 is smaller than the flow direction area of ​​the first ventilation hole 41. The largest dimension of the third crossbar 63 in the cutting direction, i.e.,The largest dimension W3 of the third crossbar 63c in the vertical direction Z is larger than the largest dimension W1 of the first crossbar 61 in the left-right direction Y and than the largest dimension W2 of the second crossbar 62 in the vertical direction Z.

[0057] According to the configuration above, the formation of multiple secondary ventilation holes 42 on the extensions 37 of the outer frame 36 makes it possible to reduce the air pressure loss AF at the outer frame 36 compared to a case where the secondary ventilation holes 42 are not formed. Consequently, it is possible to reduce the ventilation resistance of the fan grille 30 and minimize the air pressure loss AF flowing through the fan grille 30. Therefore, it is possible to reduce the energy consumption of the outdoor unit 10. It is also possible to reduce the noise generated when the air AF flows through the fan grille 30.

[0058] Because the flow direction area of ​​the second ventilation holes 42 is smaller than the flow direction area of ​​the first ventilation hole 41, it is, conversely, more difficult for the air AF to flow through the interior of the second ventilation hole 42 compared to the interior of the first ventilation hole 41. Because the largest dimension W3, i.e., the largest dimension of the third cross member 63 in the cutting direction, is larger than the largest dimension W1 of the first cross member 61 in the left-right direction Y and larger than the largest dimension W2 of the second cross member 62 in the vertical direction Z, it becomes easy, for example, to cause the air AF flowing from the interior of the outer frame 36 to the extension 37 to be blocked by the third cross member 36, and it becomes easy for the air AF to flow through the second ventilation hole 42.Accordingly, the pressure loss of the air AF flowing through the second ventilation holes 42 of the extensions 37 is greater than the pressure loss of the air AF flowing through the first ventilation holes 41 of the opposite section 31. Therefore, it is possible to reduce the amount of air AF flowing through the second ventilation holes 42 formed on the outer frame 36 and exiting to the outside of the housing 11. This makes it possible to prevent the air AF flowing through the second ventilation holes 42 formed on the outer frame 36 and exiting to the outside of the housing 11 from being drawn back into the interior of the housing 11 through the receiving openings 11c and 11d.For example, it is possible to prevent the air AF, which flows through the second ventilation holes 42 and exits to the outside of the housing 11, from being drawn into the interior of the housing of another outdoor unit or the like, which is located next to the outdoor unit 10.

[0059] By forming several secondary ventilation holes 42 on the outer frame 36, it is therefore possible to reduce the ventilation resistance of the fan grille 30 and thereby prevent the occurrence of the short-circuit phenomenon. Accordingly, it is possible to reduce the pressure loss of the air AF flowing through the fan grille 30 and thus prevent a reduction in the heat exchange efficiency of the outdoor unit 10. Consequently, it is possible to appropriately increase the performance of the refrigeration circuit unit 100.

[0060] According to the first embodiment, the receiving opening 11d is formed on the left (-Y side) of the side wall 11g of the walls forming the housing 11, located in the left-right direction Y. The frame side 35, which is the left-hand part of the outer frame 36, is the extension 37, which extends in the vertical direction Z. Therefore, it is possible to reduce the amount of air AF exiting to the left from the second ventilation holes 42c formed on the frame side 35, which is the extension 37, as explained above. Therefore, it is possible to prevent the air AF exiting to the left from the second ventilation holes 42c formed on the frame side 35 from being drawn in again through the receiving opening 11d formed on the left side wall 11g of the housing 11. Therefore, it is possible to further prevent the occurrence of the short-circuit phenomenon.

[0061] According to the first embodiment, the frame side 34, which is the part of the outer frame 36 located on the right side (+Y-side) in the left-right direction, is the extension 37, which extends in the vertical direction Z. Therefore, it is possible to reduce the amount of air AF exiting to the right from the second ventilation holes 42b formed on the frame side 34, which is the extension 37, as explained above. In a case where another outdoor unit is located to the right of the outdoor unit 10, it is therefore possible to prevent the air AF exiting to the right from the second ventilation holes 42b formed on the frame side 34 from being drawn in again by the receiving opening of said outdoor unit. Therefore, it is possible to further prevent the occurrence of the short-circuit phenomenon.

[0062] According to the first embodiment, the first direction in which the first cross member 61 extends is the vertical direction Z, and the second direction in which the second cross member 62 extends is the left-right direction Y, which is orthogonal to the vertical direction Z. The lower frame section 33, which is the part of the outer frame 36 located at the bottom in the vertical direction Z, is the extension 37, which extends in the left-right direction Y. Therefore, it is possible to reduce the amount of air AF exiting downwards from the second ventilation holes 42a, which are formed on the lower frame section 33, i.e., the extension 37, as explained above.Accordingly, it is possible to prevent the air AF, which exits downwards from the second ventilation holes 42a formed on the lower part of the frame 33, from being drawn in again from the receiving openings 11c, which are formed on a rear surface of the housing 11, when it flows under the outdoor unit 10. Therefore, it is possible to further prevent the occurrence of the short-circuit phenomenon.

[0063] According to the first embodiment, the rear surface 61a, which is the surface of the first cross member 61 on the side in the axial direction (front-to-back direction X) on which the housing 11 is arranged, and the rear surface 62a, which is the surface of the second cross member 62 on the side in the axial direction on which the housing 11 is arranged, are curved surfaces projecting towards the housing 11. Compared to a case in which the rear surfaces 61a and 62a are flat surfaces, it is therefore easy to reduce the resistance that the air AF experiences when it collides with the first cross members 61 and the second cross members 62 as it exits the outlet opening 11e of the housing 11. On the other hand, the inner surface 63d, which is a surface of the third cross member 63 facing the interior of the outer frame 36, is a flat surface.Compared to a case where the inner surface 63d is curved, it is therefore easier to increase the resistance encountered by the air when it collides with the third crossbars 63 upon exiting the outlet opening 11e of the housing 11, compared to a case where the air collides with the first crossbars 61 and the second crossbars 62. Accordingly, it is easier to suitably increase the ventilation resistance at the extension 37 compared to the ventilation resistance at the opposite section 31, and it is easier to suitably reduce the amount of air AF exiting the second ventilation opening 42. Therefore, it is possible to suitably prevent the occurrence of the short-circuit phenomenon.

[0064] According to the first embodiment, the number of second cross braces 62 is smaller than the number of first cross braces 61. The largest dimension L1 of the first cross brace 61 in the axial direction (front-to-back direction X) is larger than the largest dimension L2 of the second cross brace 62 in the axial direction. Accordingly, it is possible to increase the stiffness of the first cross braces 61 in the axial direction and to prevent the opposite section 31 from deforming when it approaches the housing 11. Therefore, even if an operator's hand comes into contact with the fan grille 30, it is possible to prevent the operator's hand from approaching the blower fan 15.By providing the second cross braces 62, it is possible to increase the stiffness of the first cross braces 61 in the left-right direction Y, and it is possible to prevent the first cross braces 31 from deforming in the left-right direction Y. Therefore, for example, it is possible to prevent the first ventilation hole 41 from widening in the left-right direction Y, and it is possible to prevent the first ventilation hole 41 from being large enough for the operator's hand to pass through. By reducing the number of second cross braces 62 so that it is less than the number of first cross braces 61, it is possible to prevent the ventilation resistance in the opposite section 31 from increasing.

[0065] The front surface 61b, which is a surface of the first crossbars 61 on the side opposite the housing 11 in the axial direction (front-back direction X), is a curved surface projecting away from the housing 11. Since both surfaces of the first crossbars 61 are axially curved, the ventilation resistance experienced by the air AF coming into contact with the first crossbars 61 is reduced, even if the largest axial dimension L1 of the first crossbar 61 is increased. Accordingly, it is possible to prevent the largest axial dimension L1 of the crossbar 61 from increasing and, in doing so, to prevent the ventilation resistance of the opposite section 31 from increasing.The front surface 62b, which is a surface of the second crossbar 62 on the side opposite the side on which the housing 11 is located in the axial direction, is a flat surface. Compared to a case where the front surface 62b is a curved surface, it is therefore simple that the largest dimension L2 of the second crossbar 62 in the axial direction is smaller than the largest dimension L1 of the first crossbar 61 in the axial direction. Compared to a case where the front surface 62b is a curved surface, it is also simpler to cast the fan grille 30 when a metal mold is used to form the fan grille 30.

[0066] According to the first embodiment, in the extension 37, the center CL2 of the second ventilation hole 42 is arranged in the axial direction (front-to-back direction X) such that it is axially offset with respect to the center CL3 of the extension 37 towards the side (-X side) on which the housing 11 is located. The smaller the ventilation resistance of the air AF exiting the outer frame 36 as it flows through the heat exchanger 13, the easier it is for its direction to be closer to the axial direction. Because only a single main body 13c of the heat exchanger 13 is provided, in the first embodiment it is easy for the ventilation resistance of the air AF to decrease as the air AF flows through the heat exchanger 13. As in Fig. As shown in Figure 4, it is therefore easy to ensure that one direction of the air AFa and AFb exiting the outer frame 36 is closer to the axial direction. In such a case, it is easy to ensure that the amount of air AFb exiting from a side of the outer frame 36 farther from the housing 11 (+X-side) increases, so that it is greater than the amount of air AFa exiting the outer frame 36 from a side closer to the housing 11 (-X-side). As shown in the first embodiment, by repositioning the second ventilation hole 42 so that it is located on the side where the housing 11 is located, it is therefore difficult for the relatively larger amount of air AFb to flow through the second ventilation hole 42. Accordingly, it is easy to reduce the amount of air AF exiting the second ventilation hole 42. Therefore, it is possible to prevent the short-circuit phenomenon.

[0067] According to the first embodiment, no ventilation holes are formed in the upper frame section 32 of the outer frame 36, which is arranged at the top in the vertical direction Z. Therefore, it is possible to prevent rainwater or the like from dripping through the upper part of the frame section 32 and to prevent such rainwater from freezing and forming icicles on the upper part of the frame section 32, etc. Accordingly, it is possible to prevent icicles that have formed on the fan grille 30 from coming into contact with the blower fan 15. Since it is not necessary to provide a separate overhang to prevent rainwater from entering, it is easy to reduce the number of parts of the outdoor unit 10. Second embodiment

[0068] Fig. Figure 12 is a partial cross-sectional view showing an outdoor unit 210 from a top view according to a second embodiment. Fig. Figure 13 is a view showing a section of the outdoor unit 210 from the left (-Y side) according to the second embodiment. In the explanations below, configurations identical to those mentioned above have the same reference numerals, with their explanations omitted.

[0069] As in Fig. As shown in Figure 12, a heat exchanger 213 according to the second embodiment comprises several main bodies 213c. In the second embodiment, three main bodies 213c are provided. Each main body 213c has the same shape as the main body 13c according to the first embodiment. The several main bodies 213c are oriented in the front-back direction X. In particular, the several main bodies 213c are oriented and arranged such that the first heat exchangers 13a are oriented in the front-back direction X and the second heat exchangers 13b are oriented in the left-right direction Y. When the several main bodies 213c are provided, the ventilation resistance of the air AF flowing through the heat exchanger 213 is therefore greater compared to the first embodiment.

[0070] As in Fig. As shown in Figure 13, the center CL4 of a second ventilation hole 242 is arranged in the axial direction (front-back direction X) such that it is axially offset with respect to the center CL3 of a frame side 235 from the side (+X-side) opposite the side on which the housing 11 is arranged, wherein the frame side 235 is an extension 237 in a fan grille 230 of the second embodiment. The remaining configurations of the outdoor unit 210 are identical to the remaining configurations of the outdoor unit 10 according to the first embodiment.

[0071] The greater the resistance of the air AF flowing through the heat exchanger 213, the easier it is for the direction in which the air AF exits an outer frame 236 to become a direction inclined with respect to the axial direction (front-to-back direction X). As explained above, in the second embodiment the resistance of the air AF flowing through the heat exchanger 213 is relatively high. As in Fig.As shown in Figure 12, the directions of the air AFa and AFb exiting the outer frame 236 can simply be inclined to a direction of inclination with respect to the axial direction. In such a case, the direction of the air AFa exiting a side (-X-side) of the outer frame 236 that is close to the housing 11 can simply become a direction that is inclined more with respect to the axial direction than the direction of the air AFb exiting a side (+X-side) of the outer frame 236 that is farther from the housing 11. As in the second embodiment, therefore, by arranging the second ventilation holes 242 such that they are offset to the side opposite the side on which the housing 11 is arranged, it is difficult for the air AFa, whose direction is inclined relatively strongly with respect to the axial direction, to flow through the second ventilation holes 242.Accordingly, it is possible to prevent the direction of the air AF exiting the second ventilation holes 242 from being inclined at a relatively high angle to the axial direction. Therefore, it is possible to prevent the air AF exiting the second ventilation holes 242 from flowing in a direction that intersects the axial direction, and it is possible to prevent the air AF from being drawn in again through the intake openings 11c and 11d. Therefore, it is possible to further prevent the occurrence of the short-circuit phenomenon.

[0072] Although embodiments of the present disclosure are explained above, the present disclosure is not limited to the aforementioned embodiments, and the configurations and methods mentioned below may be applied.

[0073] The shape of a fan grille is not specifically limited. The fan grille can be a circle, an ellipse, and / or a polygon other than a square, viewed along the axial direction of a rotation axis. As long as the number of extensions provided on an outer frame is greater than or equal to 1, their number is not specifically limited. In the first embodiment described above, for example, neither the frame lower part 33 and / or one or both of the two frame sides 34 and 35 need to be the extension 37. In other words, the second ventilation holes 42 need not be formed on the frame lower part 33 and / or one or both of the two frame sides 34 and 35. As long as an extension extends along a cutting direction that intersects the rotation axis of a blower fan in an axial direction, its cutting direction is not specifically limited.The shape of a cross-section of a first cross member, a cross-section of a second cross member, and a cross-section of a third cross member is not limited in any particular way.

[0074] The outer frame can include an extension wherein the centers of secondary ventilation holes are axially offset with respect to a center of the extension towards a side on which a housing is arranged, or an extension wherein the centers of secondary ventilation holes are axially offset with respect to a center of the extension towards a side opposite the side on which the housing is arranged. For example, the frame lower part 33 according to the first embodiment can have secondary ventilation holes offset towards the side opposite the side on which the housing 11 is arranged, as in the case of frame side 235 according to the second embodiment. The shapes of the first and second ventilation holes are not specifically limited.As long as the number of first ventilation holes and the number of second ventilation holes is greater than or equal to two, their numbers are not limited in any special way.

[0075] As long as a refrigeration circuit device that uses a refrigeration circuit in which a refrigerant circulates is used, the refrigeration circuit device according to the present disclosure is not limited to a refrigeration circuit device of an air conditioning system. The refrigeration circuit device can be a refrigeration circuit device of a heat pump water heating system or the like.

[0076] The relative positions and dimensions of the aforementioned configurations serve only as examples, and the various relative positions and dimensions of the present disclosure are not limited to them, provided that the technical scope of the present disclosure is not exceeded. The various configurations and methods of the current description may be suitably combined, provided that the aforementioned remain within the scope of the technical disclosure and / or do not conflict with it. Reference symbol list 10,210 outdoor unit 11 cases 11c, 11d Intake aperture 11e Exit opening 11g sidewall 15 blower fan 15a Rotor 30,230 fan grilles 31 opposite section 33 Frame base (extension) 34, 35 Frame page (extension) 36, 236 outer frame 37, 237 Extension 41 first ventilation hole 42, 42a, 42b, 42c, 242 second ventilation hole 61 first cross brace 62 second cross brace 63, 63a, 63b, 63c third cross brace 100 refrigeration unit R Rotation axis line Y Left-right direction (second direction) Z Vertical direction (first direction)

Claims

[1] Outdoor unit of a refrigeration unit, the outdoor unit comprising: a housing which includes an outlet opening; a blower fan comprising a rotor which is arranged on the inside of the housing facing the outlet opening; and a fan grille that covers the outlet opening from an outside of the housing; where the fan grille includes: an opposite section, which is arranged facing the outlet opening in an axial direction of a rotation axis of the rotor, and an outer frame which projects from an outer circumference of the opposite section to the housing, the opposite section includes: several first crossbars, which extend in a first direction that intersects the axial direction and are arranged with intervals between them in a second direction that intersects the axial direction and the first direction, and several second crossbars extending in the second direction and intersecting the first crossbars in the second direction, and arranged with gaps between them in the first direction, Several first ventilation holes, which are divided by the several first crossbars and the several second crossbars, are formed on the opposite section, the outer frame includes an extension which extends in a cutting direction that intersects the axial direction, the extension includes several third crossbars, which are arranged with a distance between them in the cutting direction, A second ventilation hole is formed on the extension between each pair of the third crossbars adjacent to each other in the cutting direction, a flow direction area of ​​the second ventilation hole is smaller than a flow direction area of ​​the first ventilation hole, and a largest dimension of each of the third crossbars in the cutting direction is larger than a largest dimension of each of the first crossbars in the second direction and than a largest dimension of each of the second crossbars in the first direction. [2] Outdoor unit according to claim 1, wherein a receiving opening on a side wall, which lies on a primary side in the second direction, formed by walls that make up the housing, and A part of the outer frame located on the primary side is one of the extensions that extends in the first direction. [3] Outdoor unit according to claim 2, wherein Several extensions, which include the extension, are provided, and a part which lies in the second direction, of the outer frame is one of the extensions which extends in the first direction. [4] Outdoor unit according to claim 3, wherein the first direction is a vertical direction the second direction is a left-right direction, which is orthogonal to the vertical direction, One of the extensions, which extends in the left-right direction, is a part of the outer frame located at the bottom in the vertical direction. [5] Outdoor unit according to any one of claims 1 to 4, wherein a surface of the first crossbars on the side in the axial direction on which the housing lies, and a surface of the second crossbars on the side in the axial direction on which the housing lies, are curved surfaces that project in the direction of the housing, and a surface which faces an interior of the outer frame, the third crossbar being a flat surface. [6] Outdoor unit according to any one of claims 1 to 5, wherein a number of second crossbars is less than a number of first crossbars, a largest dimension of each of the first crossbeams in the axial direction is larger than a largest dimension of each of the second crossbeams in the axial direction, a surface of the first crossbars, which lies on a side opposite the side in the axial direction on which the housing lies, is a curved surface which projects in a direction away from the housing, and a surface of the second crossbars, which lies on a side opposite the side in the axial direction on which the housing lies, is a flat surface. [7] Outdoor unit according to one of claims 1 to 6, wherein in at least one of the extensions a center of the second ventilation hole is arranged axially offset to the side on which the housing is located, with respect to a center of one of the extensions in the axial direction. [8] Outdoor unit according to one of claims 1 to 7, wherein in at least one of the extensions a center of the second ventilation hole is arranged axially offset to the side opposite the side in the axial direction on which the housing is located, with respect to a center of one of the extensions in the axial direction. [9] Refrigeration unit comprising: the outdoor unit according to any one of claims 1 to 8.

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