Heat source unit

Abstract

To provide a heat source unit that can more reliably discharge leaked refrigerant. [Solution] The heat source unit comprises a housing 10 and a storage compartment located inside the housing 10, which houses a compressor 22. The storage compartment is provided with a blower fan and an opening. The bottom of the housing 10 is provided with a shielding portion located between the blower fan and the opening, which closes the lower part of the gap between the storage compartment and at least one of the housing 10 and other components housed inside the housing 10.

Description

Technical Field

[0001] The present disclosure relates to a heat source unit.

Background Art

[0002] Patent Document 1 discloses a refrigeration cycle device and a refrigeration cycle system that can suppress the local increase in the refrigerant concentration even if the refrigerant leaks, and can prevent unnecessary energy from being consumed during normal operation. This refrigeration cycle device has a refrigeration cycle that circulates a refrigerant, a heat exchanger unit that houses at least the heat exchanger of the refrigeration cycle, and a control unit that controls the heat exchanger unit. The heat exchanger unit includes a blower fan and a refrigerant detection means that detects the concentration of the refrigerant and outputs a detection signal to the control unit. The control unit is configured to operate the blower fan when the refrigerant is detected, and to stop the blower fan when the time change in the refrigerant concentration changes from positive to negative.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present disclosure provides a heat source unit that can more reliably discharge the leaked refrigerant.

Means for Solving the Problems

[0005] The heat source unit in this disclosure comprises a housing and a storage compartment provided inside the housing, the storage compartment being provided with a blower fan and an opening, and the bottom of the housing is provided with a shielding portion located between the blower fan and the opening, which closes the lower part of the gap between the storage compartment and at least one of the housing and other components housed inside the housing. [Effects of the Invention]

[0006] According to this disclosure, leaked refrigerant can be discharged more reliably. [Brief explanation of the drawing]

[0007] [Figure 1] Perspective view of an outdoor unit according to an embodiment of the present disclosure [Figure 2] Cross-sectional view in Plan II of Figure 1 [Figure 3] Cross-sectional view in Plane III, Figure 1 [Figure 4] Cross-sectional view in Plan IV of Figure 1 [Modes for carrying out the invention]

[0008] (Knowledge and other information that formed the basis of this disclosure) At the time the inventors conceived of this disclosure, there was a technology that involved equipping a utilization unit, such as an indoor unit, or a heat source unit, such as an outdoor unit, with a blower fan. In the event of a refrigerant leak in the utilization unit or heat source unit, the blower fan would be driven to expel the leaked refrigerant from inside the housing of the utilization unit or heat source unit. This allowed the utilization unit or heat source unit to expel the leaked refrigerant from its housing in the event of a refrigerant leak. Various components, such as heat exchangers, are housed inside such a housing.

[0009] However, the inventors discovered a problem in that, depending on the arrangement of various components inside the enclosure and the blower fan, there is a risk that the refrigerant blown out by the blower fan may be hindered from being discharged to the outside of the enclosure. To solve this problem, the subject of this disclosure was formed. Therefore, this disclosure provides a heat source unit that can more reliably discharge leaked refrigerant.

[0010] The embodiments will be described in detail below with reference to the drawings. However, unnecessary details may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted. This is to avoid the following explanation becoming unnecessarily verbose and to facilitate understanding for those skilled in the art. The attached drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter described in the claims.

[0011] (Embodiment 1) Embodiment 1 will be described below with reference to Figures 1 to 4. In each figure, the symbol FR indicates the front of the outdoor unit 1 when it is installed on the mounting surface and in normal use, the symbol UP indicates the area above the outdoor unit 1, and the symbol LH indicates the area to the left of the outdoor unit 1. In the following description, each direction is a direction along the direction of the outdoor unit 1. [1-1. Structure] [1-1-1. Outdoor Unit Configuration] Figure 1 is a perspective view of the outdoor unit 1 according to this embodiment. The outdoor unit 1 shown in Figure 1 is a heat source unit of a chiller system that includes a refrigeration cycle through which a refrigerant flows and a water circuit through which water flows, and performs heat exchange between the refrigerant and water. A flammable refrigerant flows in the refrigeration cycle of the chiller system. As the flammable refrigerant, for example, R290 which contains propane, R600 which contains butane, or R600a which contains isobutane may be used.

[0012] The outdoor unit 1 comprises a rectangular parallelepiped housing 10 whose longitudinal direction extends along the left-right direction. The front of the housing 10 is provided with a front opening 11 that connects the inside and outside of the housing 10, extending over substantially the entire front surface. The left side and right side of the housing are each provided with a left side opening 13 and a right side opening 15 that connect the inside and outside of the housing 10, extending over substantially the entire left and right sides. The front opening 11, the left side opening 13, and the right side opening 15 are each covered by a side guard member 18 that is formed in a grid shape that allows air to circulate. The housing 10 includes a back panel 9, which is a flat plate-shaped member that forms the entire back surface of the housing 10.

[0013] The housing 10 includes a bottom plate 12, which is a flat plate-shaped member that forms the bottom surface of the housing 10. The bottom plate 12 corresponds to the "bottom" in this disclosure. Multiple legs 14 that support the entire housing are provided on the lower surface of the bottom plate 12. The housing 10 includes a top panel 16 that forms the top surface of the housing 10. The top panel 16 is provided with a plurality of exhaust ports 17, which are openings that connect the inside and outside of the housing 10. Each of the exhaust ports 17 is covered by a top guard member 19 that is formed in a grid shape that allows air to circulate.

[0014] The housing 10 is provided with an outdoor unit fan 20. In this embodiment, the outdoor unit fan 20 is an axial flow fan equipped with a propeller-shaped impeller. Each of the outdoor unit fans 20 is positioned inside each of the exhaust ports 17 in a plan view, with its axial flow direction facing each of the exhaust ports 37. In the outdoor unit 1, each of the outdoor unit fans 20 rotates to draw air into the interior of the housing 10 through the front opening 11, the left side opening 13, and the right side opening 15. After the air exchanges heat with the refrigerant, it is blown out from each of the exhaust ports 17 on the top surface. In other words, the outdoor unit 1 is an outdoor unit of the top-flow type, or upward-blowing type.

[0015] FIG. 2 is a cross-sectional view of the cross-section in plane II of FIG. 1 as viewed from above. Plane II is a plane that is orthogonal to the vertical direction and passes between the top plate 16 and each upper end of the heat exchanger 24. In FIG. 2, for convenience of explanation, the refrigerant piping 29 included in the refrigeration cycle is shown with omission. As shown in FIG. 2, inside the housing 10, various members and devices that form a refrigeration cycle such as a compressor 22, a heat exchanger 24, a four-way valve 26, and a receiver tank 28, and a refrigerant piping 29 that connects these to each other are accommodated.

[0016] Inside the housing 10, a buffer tank 30 that forms a water circuit through which the water of the chiller system flows is accommodated. An electrical box 40 is provided inside the housing 10. The electrical box 40 is a container that houses electrical components such as a control device that controls various electronic devices included in the outdoor unit 1. In the present embodiment, the electrical box 40 is formed in a rectangular parallelepiped shape. The electrical box 40 is provided with a refrigerant leakage sensor 42 capable of detecting refrigerant.

[0017] Next, the heat exchanger 24 will be described in detail. The heat exchanger 24 is a so-called fin-tube type heat exchanger. The heat exchanger 24 is formed by joining a plurality of metal fins to a copper refrigerant piping. Two heat exchangers 24 are accommodated in the housing 10.

[0018] These heat exchangers 24 are arranged such that the width direction is along the height direction of the housing 10. One heat exchanger 24 is bent in a substantially L shape in the longitudinal direction in a plan view of the housing 10 so as to face the left side surface opening 13 and a location on the left side in the front opening 11, and is accommodated in the housing 10. The other heat exchanger 24 is bent in a substantially L shape in the longitudinal direction in a plan view of the housing 10 so as to face the right side surface opening 15 and a location on the right side in the front opening 11, and is accommodated in the housing 10. Note that the heat exchanger 24 may be a heat exchanger of another form, such as a heat exchanger including, for example, a flat tube and a header pipe.

[0019] Figure 3 is a cross-sectional view of the plane III in Figure 1, seen from the front. Plane III is the plane that passes between the compressor 22, located on the front side of the housing 10, and the front panel 52 of the compressor case 50. Next, we will describe the compressor 22 in detail. As shown in Figure 2, two compressors 22 are housed inside the housing 10, arranged side by side in the front-to-back direction. As shown in Figure 3, each of the compressors 22 is placed on the bottom plate 12. Each of the compressors 22 is positioned close to the right side of the housing 10.

[0020] As shown in Figures 2 and 3, each of the compressors 22 is housed in a box-shaped compressor case 50. The compressor case 50 corresponds to the "storage section" in this disclosure. The compressor case 50 is formed in a rectangular parallelepiped shape, with its longitudinal direction coinciding with the front-to-back direction of the housing 10. The compressor case 50 is placed on the bottom plate 12 and comprises a front panel 52 forming the front, a left side panel 54 forming the left side, a right side panel 56 forming the right side, a rear panel 58 forming the back, and a top panel 59 forming the top.

[0021] The compressor case 50 is positioned in the left-right direction of the housing 10, close to the right side opening 15 of the housing 10. No other devices or components are placed between the heat exchanger 24, which is located opposite the right side opening 15 inside the housing 10, and the compressor case 50.

[0022] Figure 4 is a cross-sectional view of the cross-section in plane IV of Figure 1, viewed from the right. Plane IV is perpendicular to the left-right direction and passes between the point opposite the right side opening 15 of the heat exchanger 24 and the compressor case 50. As shown in Figure 4, the compressor case 50 is positioned so as to be in contact with the rear plate 9 rather than facing the front opening 11 of the heat exchanger 24.

[0023] As shown in Figures 2 to 4, a suction opening 51, which is a through-hole extending in the thickness direction, is provided at the lower part of the right side panel 56. The suction opening 51 is located between the two compressors 22 in the front-to-back direction. A blower fan unit 60 is provided on the right side panel 56. The blower fan unit 60 comprises an impeller 62, a motor 64 which is the drive source for the impeller 62, and a fan cover 66 which covers the impeller 62. The blower fan unit 60 corresponds to the "blower fan" in this disclosure.

[0024] The impeller 62 in this disclosure is an axial flow fan. The impeller 62 is positioned so as to overlap the intake opening 51 when viewed from the left or right direction, with the axial flow direction facing the intake opening 51. The impeller 62 may be other types of fans, such as a sirocco fan. The motor 64 is mounted on the outer side of the right side panel 56, below the intake opening 51.

[0025] The fan cover 66 is attached to the outer side of the right side panel 56 so as to cover the impeller 62 and the intake opening 51. The fan cover 66 is provided with a cover opening 61 located below the impeller 62 and opening opposite the bottom plate 12, thereby connecting the inside and outside of the fan cover 66. When the blower fan unit 60 is driven, it draws in air through the cover opening 61 and sends the air towards the inside of the compressor case 50. The cover opening 61 corresponds to the "fan opening" in this disclosure.

[0026] An exhaust opening 53, which is a through-hole extending in the thickness direction, is provided at the lower part of the left side panel 54. The left side panel 54 is located on the opposite side of the right side panel 56, with the compressor 22 in between, and is positioned opposite the right side panel 56. The exhaust opening 53 is located at least between the two compressors 22 in the front-rear direction. In this embodiment, the exhaust opening 53 is positioned below the rotation axis of the impeller 62. The exhaust opening 53 corresponds to the “opening” in this disclosure.

[0027] Now, let's explain the electrical box 40. The electrical box 40 is placed on the bottom plate 12 of the housing 10, as shown in Figure 3, and is positioned so that its rear is close to the rear plate 9 and its right side is close to the left side panel 54 of the compressor case 50, as shown in Figure 2. As shown in Figure 2, a refrigerant leak sensor 42 is positioned at the lower front of the electrical box 40. This positions the refrigerant leak sensor 42 close to the exhaust opening 53. In the vertical direction, the refrigerant leak sensor 42 is positioned approximately at the same level as the exhaust opening 53, or below the exhaust opening 53, and also below the rotation axis of the impeller 62.

[0028] As shown in Figures 2 to 4, a shielding plate 70 is provided on the bottom plate 12. The shielding plate 70 is a plate-shaped member that stands upright from the upper surface of the bottom plate 12. The shielding plate 70 is positioned so that its plane is perpendicular to the left-right direction and is substantially parallel to the left side opening 13 and the right side opening 15.

[0029] The shielding plate 70 is positioned between the front opening 11 and the front panel 52 of the heat exchanger 24 and the front panel 52. The front end of the shielding plate 70 abuts against the front opening 11 and the front panel 52 of the heat exchanger 24, and the rear end of the shielding plate 70 abuts against the front panel 52. As a result, in the outdoor unit 1, the gap between the lower part of the heat exchanger 24 facing the front opening 11 and the lower part of the front panel 52 in the left-right direction is shielded by the shielding plate 70.

[0030] In the heat exchanger 24 of this embodiment, multiple fins are arranged in a row at locations facing the front opening 11 and the front panel 52. These fins are arranged so that their planes are perpendicular to each other in the left-right direction. That is, at locations facing the front opening 11 and the front panel 52 of the heat exchanger 24, the fins of the heat exchanger 24 and the shielding plate 70 are arranged so that their respective planes are parallel. The front end of the shielding plate 70 is in contact with the edges of the multiple fins, or positioned between the multiple fins.

[0031] As described above, in the outdoor unit 1, each of the outdoor unit fans 20 rotates, causing air drawn into the housing 10 to pass between multiple fins and exchange heat with the refrigerant. The shielding plates 70 are arranged so that their respective planes are parallel. Therefore, in the outdoor unit 1, the heat exchange between the air and the refrigerant is suppressed from being obstructed by the shielding plates 70.

[0032] The shielding plate 70 is positioned between the blower fan unit 60 and the exhaust opening 53 in the left-right direction. The shielding plate 70 is positioned closer to the blower fan unit 60 than to the exhaust opening 53 in the left-right direction. In this embodiment, the shielding plate 70 is positioned so as to abut against the right end of the front panel 52.

[0033] As shown in Figure 3, the shielding plate 70 is formed such that its upper end is positioned above or approximately at the same position as the lower end of the blower fan unit 60. In this embodiment, the upper end of the shielding plate 70 is positioned above the cover opening 61. In this embodiment, the upper end of the shielding plate 70 is positioned above the upper end of the exhaust opening 53.

[0034] [1-2. Operation] The operation of the outdoor unit 1, configured as described above, will be explained below. In the outdoor unit 1, each of the outdoor unit fans 20 rotates, drawing air into the interior of the housing 10 through the front opening 11, the left side opening 13, and the right side opening 15. This air exchanges heat with the refrigerant flowing through the heat exchanger 24, and is then blown out from each of the exhaust ports 17 on the top surface.

[0035] In this case, refrigerant may leak from any of the components or devices forming the refrigeration cycle inside the housing 10. In this case, the outdoor unit 1 can discharge the leaked refrigerant by operating the blower fan unit 60.

[0036] More specifically, the blower fan unit 60 draws in air from inside the housing 10 and blows it towards the inside of the compressor case 50. The air that has flowed inside the compressor case 50 is discharged to the outside of the housing 10 through the exhaust opening 53. Furthermore, this air flows from the exhaust opening towards the left side opening 13 and is discharged to the outside of the housing 10 through the left side opening 13 and the front opening 11. Along with this airflow, the housing 10 can also discharge any leaked refrigerant.

[0037] In addition, since the air that discharges the refrigerant flows inside the compressor case 50, even if the outdoor unit 1 is provided with a compressor case 50 that covers the compressor 22, it is possible to suppress the accumulation of leaked refrigerant inside the compressor case 50 or the housing 10.

[0038] As described above, the compressor case 50 is positioned in the front-to-back direction, spaced apart from the part facing the front opening 11 of the heat exchanger 24. The gap between the compressor case 50 and the part facing the front opening 11 of the heat exchanger 24 is located between the blower fan unit 60 and the exhaust opening 53. Therefore, in the outdoor unit 1, there is a risk of a short circuit occurring where some of the refrigerant flowing with the air discharged from the exhaust opening 53 flows through this gap and is re-inhaled by the blower fan unit 60 and circulated.

[0039] In the outdoor unit 1 of this embodiment, a shielding plate 70 is provided in the gap between the compressor case 50 and the portion of the heat exchanger 24 facing the front opening 11, thereby shielding the gap. As a result, even if a portion of the refrigerant flowing with the air discharged from the exhaust opening 53 flows through the gap in the outdoor unit 1, it is shielded by the shielding plate 70, preventing it from being re-inhaled by the blower fan unit 60. In addition, in the outdoor unit 1, the blower fan unit 60 sends air into the compressor case 50, thereby lowering the temperature and refrigerant concentration inside the compressor case 50.

[0040] [1-3. Effects, etc.] As described above, in this embodiment, the outdoor unit 1 comprises a housing 10 and a compressor case 50 provided inside the housing 10, which houses a compressor 22. The compressor case 50 is provided with a blower fan unit 60 and an exhaust opening 53. The bottom plate 12 of the housing 10 is provided with a shielding plate 70 located between the blower fan unit 60 and the exhaust opening 53, which closes the lower part of the gap between the compressor case 50 and at least one of the housing 10 and other components housed inside the housing 10. As a result, in the outdoor unit 1, it is suppressed that a portion of the refrigerant flowing with the air discharged from the exhaust opening 53 is re-inhaled by the blower fan unit 60. Therefore, in the outdoor unit 1, the circulation of leaked refrigerant inside the housing 10 can be suppressed.

[0041] As in this embodiment, the blower fan unit 60 is provided with a cover opening 61 into which air is drawn in by the operation of the blower fan unit 60, and the upper end of the shielding plate 70 may be located above the cover opening 61. This makes it possible to more reliably suppress the re-intake of a portion of the refrigerant flowing with the air discharged from the exhaust opening 53 into the cover opening 61 in the outdoor unit 1.

[0042] As in this embodiment, the upper end of the shielding plate 70 may be located above the upper end of the exhaust opening 53. This makes it possible to more reliably suppress the re-intake of a portion of the refrigerant flowing with the air discharged from the exhaust opening 53 into the cover opening 61 in the outdoor unit 1.

[0043] As in this embodiment, the shielding plate 70 may be positioned closer to the blower fan unit 60 than the exhaust opening 53. As a result, the shielding plate 70 is positioned at a location where the refrigerant, blown out from the exhaust opening 53, is lower due to gravity than at a location where it is diffused vertically or horizontally. Therefore, the outdoor unit 1 can more reliably suppress the re-intake of some of the refrigerant flowing with the air discharged from the exhaust opening 53 into the cover opening 61.

[0044] As in this embodiment, the compressor case 50 may be provided in a position where one side is in contact with the side of the housing 10. This makes it possible to reduce the gap between the compressor case 50 and the housing 10, or other components housed inside the housing 10, within the housing 10. Therefore, in the outdoor unit 1, by providing one shielding plate 70, it is possible to suppress the re-intake of some of the refrigerant flowing with the air discharged from the exhaust opening 53 into the cover opening 61.

[0045] As in this embodiment, a refrigerant leak sensor 42 may be provided in a position adjacent to the exhaust opening 53. As a result, the refrigerant leak sensor 42 is positioned close to the exhaust opening 53. Therefore, the outdoor unit 1 can detect refrigerant leaks at any location inside the housing 10.

[0046] (Other embodiments) As described above, Embodiment 1 has been explained as an example of the technology disclosed in this application. However, the technology in this disclosure is not limited to this and can be applied to embodiments that have been modified, replaced, added, or omitted. Furthermore, it is possible to create new embodiments by combining the components described in Embodiment 1 above. Therefore, other embodiments are illustrated below.

[0047] The shielding plate 70 may have any height dimension as long as it is located above the cover opening 61. For example, the upper end of the shielding plate 70 may be located below the upper end of the blower fan unit 60. In this way, in the outdoor unit 1, the space between the heat exchanger 24 and the compressor case 50 is shielded by the shielding plate 70 in the lower part of the housing 10 where refrigerant tends to accumulate, while the space between the heat exchanger 24 and the compressor case 50 is not shielded by the shielding plate 70 in the upper part of the housing 10. Therefore, in the upper part of the housing 10, during normal operation when no refrigerant leakage occurs, the airflow drawn into the housing between the heat exchanger 24 and the compressor case 50 is suppressed from being obstructed by the shielding plate 70. In this way, in the outdoor unit 1, during normal operation when no refrigerant leakage occurs, the decrease in the efficiency of heat exchange between the refrigerant flowing through the heat exchanger 24 and the air drawn into the housing is suppressed.

[0048] In the embodiment described above, the outdoor unit 1 was assumed to be the heat source unit of a chiller system. However, it is not limited to this, and the outdoor unit 1 can be applied to various devices equipped with a refrigerant circuit, such as air conditioning systems, water heaters, heat pump hot water heaters, and other air conditioning systems.

[0049] The embodiments described above are for illustrative purposes only and may be modified, replaced, added, or omitted within the scope of the claims or equivalents thereof.

[0050] (Note) Based on the above description of embodiments, the following technologies are disclosed.

[0051] (Technical 1) A heat source unit comprising a housing, a storage compartment provided inside the housing and containing a compressor, wherein the storage compartment is provided with a blower fan and an opening, and the bottom of the housing is provided with a shielding portion located between the blower fan and the opening, which closes the lower part of the gap between the storage compartment and at least one of the housing and other components housed inside the housing. This prevents some of the refrigerant flowing with the air discharged from the opening in the heat source unit from being re-inhaled by the blower fan. Therefore, the heat source unit can suppress the circulation of leaked refrigerant within the casing.

[0052] (Technology 2) The heat source unit according to Technology 1, wherein the upper end of the shielding portion is located above the lower end of the blower fan. This prevents some of the refrigerant flowing with the air discharged from the opening in the heat source unit from being re-inhaled into the fan opening.

[0053] (Technical 3) The heat source unit according to Technical 1 or Technical 2, wherein the blower fan is provided with a fan opening into which air is drawn in by the operation of the blower fan, and the upper end of the shielding portion is located above the fan opening. This allows the heat source unit to more reliably prevent some of the refrigerant flowing with the air discharged from the opening from being re-inhaled into the fan opening.

[0054] (Technical 4) The heat source unit according to any one of Technical 1 to 3, wherein the upper end of the shielding portion is located above the upper end of the opening. This prevents some of the refrigerant flowing with the air discharged from the opening in the heat source unit from being re-inhaled into the fan opening.

[0055] (Technical 5) The heat source unit according to any one of Technical 1 to Technical 4, wherein the shielding portion is provided at a position closer to the blower fan than the opening. As a result, the shielding section is positioned lower than the position where the refrigerant blown out from the opening is diffused vertically or horizontally, due to gravity. Therefore, the heat source unit can more reliably prevent some of the refrigerant flowing with the air discharged from the opening from being re-inhaled into the fan opening.

[0056] (Technical 6) The heat source unit according to any one of Technical 1 to Technical 5, wherein the storage section is provided at a position where one side is in contact with the side of the housing. This reduces the gap between the storage section and the housing, or other components housed inside the housing. Therefore, in the heat source unit, by providing a single shielding section, it is possible to suppress the re-intake of some of the refrigerant flowing with the air discharged from the opening into the fan opening.

[0057] (Technology 7) A heat source unit according to any one of Technology 1 to Technology 6, wherein a refrigerant leak sensor is provided at a position adjacent to the opening. This ensures that the refrigerant leak sensor is positioned close to the opening. Therefore, the heat source unit can detect refrigerant leaks regardless of where they occur inside the housing. [Industrial applicability]

[0058] This disclosure is applicable to heat source units of refrigeration cycle systems that utilize flammable refrigerants in their refrigeration circuits. Specifically, this disclosure is applicable to outdoor units of air conditioners, humidity control systems, heat pump systems, and the like. [Explanation of Symbols]

[0059] 1 Outdoor unit 9 Back plate 10 cabinets 11 Front opening 12 Bottom plate (bottom) 13 Left side opening 14 Legs 15 Right side opening 16 Top plate 17 Exhaust vent 18 Side guard member 19 Top surface guard member 20 Outdoor unit fan 22 Compressor 24 Heat exchanger 26 Four-way valve 28 Receiver Tank 29 Refrigerant piping 30 Buffer Tanks 37 Exhaust vent 40 Electrical box 42 Refrigerant leak sensor 50 Compressor case (storage section) 51 Intake opening 52 Front Panel 53 Exhaust opening (opening) 54 Left side panel 56 Right side panel 58 Rear Panel 59 Top panel 60. Blower fan unit (blower fan) 61 Cover opening (fan opening) 62 Impeller 64 motors 66 Fan Cover 70 Shielding plate

Claims

1. The casing and A storage compartment is provided inside the aforementioned enclosure, and a compressor is housed inside it, Equipped with, The aforementioned storage compartment includes: A cooling fan, The opening and A system was established, At the bottom of the aforementioned housing, Located between the blower fan and the opening, The aforementioned storage section, At least one of the housing and other components housed inside the housing, A shielding section is provided to close the lower part of the gap. Heat source unit.

2. The upper end of the shielding portion is located above the lower end of the blower fan. The heat source unit according to claim 1.

3. The blower fan is provided with a fan opening into which air is drawn in by the operation of the blower fan. The upper end of the shielding portion is located above the fan opening. A heat source unit according to claim 1 or claim 2.

4. The upper end of the shielding portion is located above the upper end of the opening. A heat source unit according to claim 1 or claim 2.

5. The shielding portion is provided in a position closer to the blower fan than the opening. A heat source unit according to claim 1 or claim 2.

6. The storage compartment is provided at a position where one side is in contact with the side of the housing. A heat source unit according to claim 1 or claim 2.

7. A refrigerant leak sensor is provided at a location adjacent to the aforementioned opening. A heat source unit according to claim 1 or claim 2.

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