WO2024018510A1

WO2024018510A1 - Refrigeration cycle device

Info

Publication number: WO2024018510A1
Application number: PCT/JP2022/028012
Authority: WO
Inventors: 康太鈴木; 洋貴佐藤
Original assignee: 三菱電機株式会社
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2024-01-25

Abstract

This refrigeration cycle device comprises a refrigerant circuit in which a compressor, a condenser, an expansion valve, and an evaporator are connected by pipes, and a refrigerant circulates through the pipes, wherein: a fluorescent agent that has been added to a refrigerating machine oil circulates with the refrigerant through the refrigerant circuit; and a bottom plate of a heat source unit having the compressor and the condenser which are installed therein has a shape of protrusions and recesses that has a bottom surface section on which the fluorescent agent that has leaked out stays when the refrigerant has leaked out of the refrigerant circuit.

Description

Refrigeration cycle equipment

The present disclosure relates to a refrigeration cycle device equipped with a refrigerant leak detection means.

The fluorocarbon refrigerant gas used in refrigeration cycle equipment uses greenhouse gases that cause global warming. In order to reduce greenhouse gas emissions, a shift to alternative fluorocarbon refrigerants is underway, and the amount of fluorocarbon refrigerant gas used in refrigeration cycle equipment is being reduced. However, at the same time, it is also important to develop technology to reduce the impact of fluorocarbon refrigerant gas on global warming by early detection and treatment of refrigerant leaking from already installed refrigeration cycle equipment.

Japanese Patent Application Publication No. 2012-184435

One way to make it easier to find refrigerant leaks is to seal in a fluorescent agent inside the refrigeration cycle device. In this method, when a refrigerant leak occurs, the fluorescent agent is leaked together with the refrigerant from the leak location. Therefore, when irradiated with an ultraviolet lamp, the fluorescent agent attached to the leakage area emits light, making it possible to identify the leakage area. However, the number of parts in the refrigerant circuit of a refrigeration cycle device is large, and the shape of the piping is complicated. There are some cases where it is not possible to identify.

Furthermore, in general conventional heat source units, there are not many irregularities on the bottom plate, so even if a fluorescent agent is added to the refrigerating machine oil, if a large amount of refrigerant leaks, the dripped refrigerating machine oil and the fluorescent agent will be removed. will spread over a wide area on the bottom plate. Therefore, in the bottom plate, the range to be irradiated with ultraviolet rays becomes large, and it takes time to identify the leakage location.

The present disclosure has been made to solve such problems, and aims to provide a refrigeration cycle device that enables early identification of a refrigerant leak location when a refrigerant leaks.

A refrigeration cycle device according to the present disclosure is a refrigeration cycle device including a refrigerant circuit in which a compressor, a condenser, an expansion valve, and an evaporator are connected by piping, and in which a refrigerant circulates through the piping. , a fluorescent agent added to refrigerating machine oil is circulated together with the refrigerant, and a bottom plate of a heat source unit in which the compressor and the condenser are installed is leaked when the refrigerant leaks from the refrigerant circuit. It has an uneven shape having a bottom surface where the fluorescent agent stays.

According to the refrigeration cycle device according to the present disclosure, when the refrigerant leaks from the refrigerant circuit, the heat source unit is provided with a bottom plate having an uneven shape having a bottom part where the leaked fluorescent agent stays. The location where the refrigerant, refrigerating machine oil, and fluorescent agent accumulate can be limited to a part of the uneven shape of the bottom plate, making it possible to quickly identify the location where the refrigerant leaks.

FIG. 2 is a perspective view showing an example of the appearance of a heat source unit provided in the refrigeration cycle device according to the first embodiment. 1 is a schematic diagram showing an example of a circuit configuration of a refrigerant circuit that constitutes a refrigeration cycle device according to a first embodiment; FIG. 1 is a perspective view showing an example of the configuration of a heat source unit according to Embodiment 1. FIG. FIG. 3 is a plan view showing an example of the configuration of the bottom plate of the heat source unit according to the first embodiment. FIG. 2 is a side view showing an example of the configuration of the bottom plate of the heat source unit according to the first embodiment. FIG. 3 is a side view schematically showing an example of the configuration of the bottom plate of the heat source unit according to the first embodiment. FIG. 3 is a side view and a plan view schematically showing an example of a method for attaching refrigerant circuit components in the heat source unit according to the first embodiment. 7 is a plan view showing an installation environment of a heat source unit provided in a refrigeration cycle device according to a second embodiment. FIG. 7 is a plan view showing an installation environment of a heat source unit provided in a refrigeration cycle device according to a second embodiment. FIG. FIG. 3 is a perspective view showing an installation environment of a heat source unit provided in a refrigeration cycle device according to a second embodiment. 7 is a plan view showing an example of the configuration of a heat source unit provided in a refrigeration cycle device according to Embodiment 3. FIG. FIG. 7 is a perspective view showing an example of the configuration of a heat source unit provided in a refrigeration cycle device according to a fourth embodiment. FIG. 7 is a plan view schematically showing an example of the configuration of a bottom plate of a heat source unit according to Embodiment 5. FIG. FIG. 9 is a cross-sectional view schematically showing an example of the configuration of a heat source unit provided in a refrigeration cycle device according to a ninth embodiment. FIG. 7 is a side view schematically showing an example of the configuration of a bottom plate of a heat source unit according to Embodiment 10. FIG. FIG. 7 is an explanatory diagram schematically showing an example of the configuration of a bottom plate of a heat source unit according to Embodiment 8.

Hereinafter, a refrigeration cycle device, a heat source unit, etc. according to an embodiment will be described with reference to drawings and the like. In the following drawings, the same reference numerals are the same or equivalent, and are common in the preamble of the embodiments described below. Further, in the drawings, the size relationship of each component may differ from the actual one. In each drawing, the relative dimensional relationship or shape of each component may differ from the actual one. The forms of the constituent elements shown in the entire specification are merely examples, and are not limited to the embodiments described in the specification, and may be modified in various ways without departing from the gist of the present disclosure. It is possible to do so. The combinations described in the specification are not limited to the combinations in each embodiment, and components described in other embodiments can be applied to other embodiments. Furthermore, regarding multiple devices of the same type that are distinguished by subscripts, if there is no need to distinguish or specify them, the symbols, subscripts, etc. may be omitted from the description.

In each drawing, the width direction of the heat source unit is the X direction, and the depth direction of the heat source unit is the Y direction. The Y direction is sometimes referred to as a first direction. The X direction is sometimes referred to as the second direction. In the Y direction, the Y1 side is the front side of the heat source unit, that is, the front side, and the Y2 side is the rear side, that is, the back side of the heat source unit. The X direction and the Y direction are, for example, horizontal directions. The Z direction is a direction that intersects the X direction and the Y direction. The Z direction is, for example, a vertical direction, that is, an up-down direction. When the Z direction is an up-down direction, the Z1 side is the upper side or upward direction, and the Z2 side is the lower side or downward direction. The Z direction may be a vertical direction.

Embodiment 1.
(refrigeration cycle device 100)
The configuration of refrigeration cycle apparatus 100 according to Embodiment 1 will be described using FIGS. 1 and 2. FIG. 1 is a perspective view showing an example of the appearance of a heat source unit provided in a refrigeration cycle apparatus according to a first embodiment. FIG. 2 is a schematic diagram showing an example of a circuit configuration of a refrigerant circuit that constitutes the refrigeration cycle device according to the first embodiment.

As shown in FIGS. 1 and 2, the refrigeration cycle device 100 according to the first embodiment includes a heat source unit 1 and a load unit 2, and the heat source unit 1 and the load unit 2 are connected by a refrigerant pipe 10. By doing so, a refrigeration cycle is formed. Note that, although the refrigeration cycle device 100 is used as, for example, an air conditioner or a water heater, its use is not limited thereto.

As shown in FIG. 2, the heat source unit 1 houses a compressor 11, a condenser 12, and a blower fan 15. The blower fan 15 is installed relative to the condenser 12 and blows fluid such as air to the condenser 12. The fluid such as air blown by the blower fan 15 is, for example, the outside air around the heat source unit 1. Note that the blower fan 15 is installed, for example, at the top of the heat source unit 1, as shown in FIG.

The load unit 2 includes an expansion valve 13, an evaporator 14, and a blower fan 16. The blowing fan 16 is installed relative to the evaporator 14 and blows fluid such as air to the evaporator 14. The fluid such as air that is blown by the ventilation fan 16 is, for example, the air around the load unit 2. When the refrigeration cycle device 100 is an air conditioner, the fluid such as air is indoor air in an air-conditioned area where the load unit is installed.

As shown in FIG. 2, the compressor 11, condenser 12, expansion valve 13, and evaporator 14 are connected by a refrigerant pipe 10. Note that the refrigerant pipe 10 is sometimes simply referred to as a "pipe."

In the example shown in FIG. 2, one load unit 2 is provided for the heat source unit 1, but the invention is not limited to this. For example, two or more load units 2 may be provided in parallel to the heat source unit 1. may be connected to. Further, when a plurality of load units 2 are provided, the load units 2 may all have the same capacity, or may have different capacities.

The compressor 11 takes in a low-temperature and low-pressure refrigerant, compresses the refrigerant, and discharges the refrigerant as a high-temperature and high-pressure refrigerant. The compressor 11 may be an inverter compressor whose rotation speed is controlled by an inverter. Here, although the heat source unit 1 shown in FIGS. 1 and 2 has a configuration having one compressor 11, the present invention is not limited to this. For example, the heat source unit 1 may include two or more compressors 11 depending on the magnitude of the load on the load unit 2.

The condenser 12 is connected to the discharge side of the compressor 11 via the refrigerant pipe 10. The refrigerant discharged from the compressor 11 flows into the condenser 12 . The condenser 12 exchanges heat between the refrigerant and a fluid such as air. The condenser 12 is, for example, a fin-and-tube heat exchanger. However, the condenser 12 is not limited to a fin-and-tube type heat exchanger, and may be a heat exchanger of other forms, such as a heat exchanger with corrugated fins or a finless heat exchanger without fins. It may be. Further, the fluid such as air used for heat exchange in the condenser 12 is not limited to air. The fluid such as air may be, for example, water, a refrigerant, or brine. In that case, the blower fan 15 installed with respect to the condenser 12 is unnecessary, so the blower fan 15 does not need to be installed. In this way, the condenser 12 performs heat exchange between the refrigerant and the fluid and condenses the refrigerant.

The high-pressure liquid refrigerant sent out from the condenser 12 is sent to the load unit 2 and flows into the expansion valve 13. The high pressure liquid refrigerant is reduced in pressure by the expansion valve 13 and becomes a low pressure refrigerant. The expansion valve 13 is a pressure reducing device that reduces the pressure of the refrigerant. The expansion valve 13 is, for example, an electronic expansion valve, a capillary tube, or the like.

The low-pressure refrigerant flowing out from the expansion valve 13 flows into the evaporator 14 . The evaporator 14 exchanges heat between the refrigerant and a fluid such as air. The evaporator 14 is, for example, a fin-and-tube heat exchanger. However, the evaporator 14 is not limited to a fin-and-tube type heat exchanger, and may be a heat exchanger of other forms, such as a heat exchanger with corrugated fins or a finless heat exchanger without fins. It may be. Furthermore, the fluid such as air is not limited to air. The fluid such as air may be, for example, water, a refrigerant, or brine. In that case, the blower fan 16 installed with respect to the evaporator 14 is unnecessary, so the blower fan 16 does not need to be installed. In this way, the evaporator 14 exchanges heat between the refrigerant and the fluid and evaporates the refrigerant.

The refrigerant flowing out of the evaporator 14 flows into the compressor 11. Then, the refrigerant is compressed again by the compressor 11 and discharged toward the condenser 12. In the refrigeration cycle device 100, this cycle is repeated.

As the type of refrigerant circulating in the refrigerant circuit in the refrigeration cycle device 100, for example, a single refrigerant, a pseudo-azeotropic refrigerant mixture, a non-pseudo-azeotropic refrigerant mixture, etc. are used. Examples of single refrigerants include R22 and R32. Examples of the pseudo azeotropic refrigerant mixture include R410A and R404A. Examples of the non-pseudo azeotropic refrigerant mixture include R407C.

(Heat source unit 1)
Next, the configuration of the heat source unit 1 according to the first embodiment will be described using FIG. 1 and FIGS. 3 to 7. FIG. 3 is a perspective view showing an example of the configuration of the heat source unit according to the first embodiment. In FIG. 3, for the sake of explanation, the heat source unit 1 is shown with the exterior panel 1a and the maintenance panel 1b removed. Further, in FIG. 3, for the sake of explanation, the illustration of each component disposed in the upper part of the heat source unit 1 is omitted. FIG. 4 is a plan view showing an example of the configuration of the bottom plate of the heat source unit according to the first embodiment. FIG. 5 is a side view showing an example of the configuration of the bottom plate of the heat source unit according to the first embodiment. FIG. 6 is a side view schematically showing an example of the configuration of the bottom plate of the heat source unit according to the first embodiment. FIG. 7 is a side view and a plan view schematically showing an example of a method for attaching refrigerant circuit components in the heat source unit according to the first embodiment.

As shown in FIG. 1, the heat source unit 1 has a rectangular parallelepiped shape as a whole. Exterior panels 1a are provided on three of the four side surfaces of the heat source unit 1, that is, on the left, right, and back sides. Further, among the four side surfaces of the heat source unit 1, a maintenance panel 1b is removably provided on the remaining one side surface, that is, the front side. The maintenance panel 1b is arranged on the front side of the heat source unit 1 on the Y1 side in the Y direction. That is, the maintenance panel 1b is provided on one of the side surfaces extending in the X direction. The maintenance panel 1b is removed by a service person during maintenance such as inspection of the heat source unit 1. In this way, the casing of the heat source unit 1 is composed of three exterior panels 1a and one maintenance panel 1b. Note that the maintenance panel 1b may be composed of one panel, or may be divided into two panels, left and right, as shown in FIG.

Furthermore, the three exterior panels 1a are each provided with an intake port for taking air into the heat source unit 1. The upper surface portion 1c of the heat source unit 1 is open, and a blower fan 15 is provided directly below the upper surface portion 1c. A mesh fan guard is installed on the upper surface portion 1c of the heat source unit 1, if necessary. When the blower fan 15 is driven, air is taken in from the intake port provided in the exterior panel 1a. The taken air passes through the condenser 12 and is discharged to the outside of the heat source unit 1 from the opening in the upper surface portion 1c of the heat source unit 1. In addition, in the example of FIG. 1, two openings are provided in the upper surface part 1c of the heat source unit 1, and the ventilation fan 15 is provided for each of two openings, but it is not limited to that case. That is, one opening may be provided in the upper surface portion 1c of the heat source unit 1, and one ventilation fan 15 may be provided for the one opening. In this way, the number of openings in the upper surface portion 1c of the heat source unit 1 and the number of blower fans 15 may be any number greater than or equal to 1, and are not particularly limited.

A support member 1d that supports the condenser 12 is provided below the three exterior panels 1a. The exterior panel 1a is attached to a support member 1d. Further, as shown in FIG. 3, the condenser 12 is placed on and attached to the support member 1d.

Further, as shown in FIG. 3, in the heat source unit 1, refrigerant circuit components such as the compressor 11 and the condenser 12 are fixed to the bottom plate 17, the exterior panel 1a, or the support member 1d. As shown in FIG. 3, the condenser 12 has a U-shape in plan view. The condenser 12 is, for example, a fin-and-tube heat exchanger composed of fins and heat exchanger tubes. The heat exchanger tubes extend parallel to the XY plane. The heat exchanger tube is bent and has a U-shape in plan view. Therefore, the tube axis direction of the heat exchanger tube changes into a U-shape according to the shape of the heat exchanger tube. The condenser 12 is arranged on the Y2 side in the Y direction, which is the depth direction of the heat source unit 1. Specifically, the condenser 12 is arranged along the left and right sides of the heat source unit 1 and along the rear exterior panel 1a. On the other hand, refrigerant circuit components such as the compressor 11 and the condenser 12 are arranged on the Y1 side in the Y direction, which is the depth direction of the heat source unit 1.

4 to 6 show examples of the shape of the bottom plate 17 provided in the heat source unit 1. The bottom plate 17 is arranged at the lower part of the heat source unit 1, that is, at the bottom. The bottom plate 17 is installed parallel to the XY plane. The bottom plate 17 is arranged parallel to the installation surface of the heat source unit 1. The bottom plate 17 has an uneven shape. As shown in FIG. 4, the bottom plate 17 has a rectangular shape in plan view. The bottom plate 17 has an uneven shape by having a bottom surface portion 172a (see FIG. 6) consisting of a recess in which fluorescent agent leaked together with the refrigerant stays when the refrigerant leaks from the refrigerant circuit. In the example shown in FIGS. 4 and 5, the bottom plate 17 has an uneven shape by providing at least one of a rib-shaped convex portion 171 and a groove-shaped concave portion 172. Both the convex portion 171 and the concave portion 172 extend in the Y direction. The recess 172 is recessed toward the Z2 side with respect to the protrusion 171.

The bottom plate 17 may have an uneven shape by having at least one of a convex portion 171 and a concave portion 172 on the upper surface portion 17a of the bottom plate 17, but the present invention is not limited thereto. The bottom plate 17 may have an uneven shape by placing a panel having an uneven shape on the upper surface 17a of the main body of the bottom plate 17, as shown in FIG.

Alternatively, the bottom plate 17 may have an uneven shape by having a recess 172 on the upper surface 17a of the bottom plate 17, as shown in FIG. 6(a). The recessed portion 172 is recessed from the upper surface portion 17a of the bottom plate 17 toward the Z2 side, as shown in FIG. 6(a). The convex portion 171 is located between the concave portions 172 . The convex portions 171 and the concave portions 172 are arranged alternately.

In the case of FIG. 6(a), the recess 172 has a trapezoidal cross-sectional shape. The recessed portion 172 has a flat bottom portion 172a and an inclined surface portion 172b adjacent to the bottom portion 172a. Both the flat bottom portion 172a and the inclined surface portion 172b have an elongated rectangular shape when viewed from above. Furthermore, the longitudinal directions of the flat bottom portion 172a and the inclined surface portion 172b both extend in the Y direction. The inclined surface portions 172b are installed on both sides of the bottom surface portion 172a in the X direction. The inclined surface portion 172b is inclined toward the outside of the bottom surface portion 172a in the X direction as it goes from the bottom surface portion 172a toward the Z1 side in the Z direction.

Further, in the case of FIG. 6(a), the convex portion 171 has a flat main surface portion 171a. The flat main surface portion 171a is connected to the inclined surface portion 172b of the recess 172. In the case of FIG. 6A, the main surface portion 171a is the upper surface portion 17a of the bottom plate 17 itself. The flat main surface portion 171a has an elongated rectangular shape in plan view. Further, the longitudinal direction of the flat main surface portion 171a extends in the Y direction.

In the example of FIG. 6(a), the upper surface portion 17a of the bottom plate 17 has a concave portion 172, thereby forming an uneven shape. However, it is not limited to that case. That is, the upper surface portion 17a of the bottom plate 17 may have an uneven shape by having the convex portion 171.

Alternatively, as shown in FIG. 6(b), the upper surface portion 17a of the bottom plate 17 may have an uneven shape by having both a convex portion 171 and a concave portion 172. In the case of FIG. 6(b), the recessed portion 172 is recessed toward the Z2 side in the Z direction from the upper surface portion 17a. Furthermore, the recess 172 has a trapezoidal shape when viewed from the side. The recessed portion 172 has a flat bottom portion 172a and an inclined surface portion 172b adjacent to the bottom portion 172a. The flat bottom portion 172a and the inclined surface portion 172b both have a rectangular shape when viewed from above. The inclined surface portions 172b are installed on both sides of the bottom surface portion 172a in the X direction. The inclined surface portion 172b is inclined toward the outside of the bottom surface portion 172a in the X direction as it goes from the bottom surface portion 172a toward the Z1 side in the Z direction.

Further, in the case of FIG. 6(b), the convex portion 171 protrudes from the upper surface portion 17a toward the Z1 side in the Z direction. The convex portion 171 has a trapezoidal shape when viewed from the side, as shown in FIG. 6(b). Therefore, the convex portion 171 has a trapezoidal cross-sectional shape. Therefore, the convex portion 171 has a flat main surface portion 171a and an inclined surface portion 171b adjacent to the main surface portion 171a. Both the flat main surface portion 171a and the inclined surface portion 171b have an elongated rectangular shape when viewed from above, and their longitudinal directions extend in the Y direction. The inclined surface portions 171b are installed on both sides of the main surface portion 171a in the X direction. The inclined surface portion 171b is inclined toward the outside of the main surface portion 171a in the X direction as it goes from the main surface portion 171a toward the Z2 side in the Z direction.

The bottom plate 17 has a plurality of protrusions 171 and a plurality of recesses 172. Both the plurality of protrusions 171 and the plurality of recesses 172 are arranged along the Y direction. Further, the plurality of convex portions 171 are arranged parallel to each other at intervals in the X direction. Further, the plurality of recesses 172 are arranged parallel to each other at intervals in the X direction. Note that the width of the protrusion 171 in the X direction and the width of the recess 172 in the X direction may be the same or different. However, in order to easily identify the location of the refrigerant leak, it is desirable that the width of the recess 172 in the X direction is smaller than the width of the protrusion 171 in the X direction, as shown in FIGS. 5 and 7(a).

As shown in FIGS. 7(a) and 7(b), refrigerant circuit components such as the compressor 11 and the condenser 12 are fixed to the convex portion 171 of the bottom plate 17. Refrigerant circuit components such as the compressor 11 and the condenser 12 have a larger bottom area than the convex portions 171 and the concave portions 172, so they are disposed across one or more convex portions 171 and one or more concave portions 172. , the fixed location is the convex portion 171. Refrigerant circuit components such as the compressor 11 and the condenser 12 are fixed to the convex portion 171 with fixing devices such as screws.

As shown in FIG. 4, a drainage hole 173 may be formed in the recess 172 of the bottom plate 17 to drain rainwater and the like. A drain hole 173 is arranged within the recess 172. The drain hole 173 is a through hole that penetrates the thickness of the bottom plate 17. As shown in FIG. 4, a plurality of water drainage holes 173 are formed. The water drainage hole 173 is provided at the end of the recess 172 on the Y1 side and the end on the Y2 side in the Y direction. Further, if necessary, a drainage hole 173B may be provided between the end of the recess 172 on the Y1 side and the end on the Y2 side in the Y direction. Furthermore, if necessary, a hole 173A for draining water may also be provided in the convex portion 171. The drain holes 173, 173A, and 173B have, for example, a circular shape in plan view. The drain hole 173 is a hole for draining drain water such as dew water or frost melting water adhering to the surface of the heat transfer tube or fin of the condenser 12 to the outside of the heat source unit 1. The bottom surface 172a of the recess 172 is sometimes called a "water receiving surface" because the drain water flows toward the drain hole 173 on the surface thereof.

Furthermore, a notch 174 may be formed in the bottom plate 17 to take out the refrigerant pipe 10 connected to the load unit 2. The cutout portion 174 is a through hole that penetrates the thickness of the bottom plate 17. The cutout portion 174 may be formed across the convex portion 171 and the concave portion 172. The cutout portion 174 has, for example, a rectangular shape in plan view.

(Refrigerating machine oil)
In the refrigeration cycle device 100 according to the first embodiment, a fluorescent agent is attached to the refrigeration oil that circulates in the refrigerant circuit together with the refrigerant. The fluorescent agent is added to refrigerating machine oil in order to detect leakage of refrigerant from the refrigerant pipe 10 and the like. The fluorescent agent emits light when exposed to ultraviolet rays emitted from an ultraviolet lamp, for example.

FIG. 7(a) is a diagram showing an example of a case where refrigerant leakage occurs in the heat source unit according to the first embodiment. FIG. 7A shows an example in which refrigerant leaks from a connecting portion 20 connecting the compressor 11 and the refrigerant pipe 10. In FIG.

As shown in FIG. 7(a), the compressor 11 has a discharge pipe 11a that discharges refrigerant and a suction pipe 11b that sucks the refrigerant. The discharge pipe 11a and the refrigerant pipe 10 are connected through a connecting portion 20. The connection part 20 that connects the discharge pipe 11a and the refrigerant pipe 10 is, for example, a flare connection part or a brazed part. In other words, when the connection part 20 is a flare connection part, for example, a flare nut is attached to either the discharge pipe 11a or the refrigerant pipe 10, and a union is attached to the other. Then, the discharge pipe 11a and the refrigerant pipe 10 are connected by tightening the union and the flare nut using a tool such as a torque wrench. Moreover, when the connection part 20 is a brazed part, the discharge pipe 11a and the refrigerant|coolant piping 10 are joined by brazing.

If a refrigerant leak occurs due to vibrations generated in the compressor 11, deterioration of the compressor 11 or the connection part 20 over time, poor connection of the connection part 20, etc., the leakage location may have gaps, cracks, or small holes. As a result, refrigeration oil also leaks from the leakage location. The timing of refrigerant leakage and the timing of refrigerating machine oil leakage may be simultaneous or may be slightly different from each other. Since a fluorescent agent is added to the refrigerating machine oil, the added fluorescent agent also leaks along with the refrigerating machine oil. As a result, the refrigerant, refrigeration oil, and fluorescent agent flow out from the leakage location. The leaked refrigerating machine oil and fluorescent agent drip downward from the leakage location and stay on the uneven bottom surface portion 172a of the bottom plate 17. The bottom portion 172a of the recess 172 is sometimes referred to as a “fluorescent agent retention portion” because the leaked fluorescent agent is retained therein. In this way, the bottom part 172a functions as a "fluorescent agent retention part". Therefore, as shown in FIG. 7(a), it is desirable that the connecting portion 20 be disposed directly above the recess 172 of the bottom plate 17, but the present invention is not limited thereto. Note that the shell of the compressor 11 is supported by a plurality of legs 11c, as shown in FIG. 7(b). Although FIG. 7B shows an example in which the compressor 11 is supported by four legs 11c, the number of legs 11c is not particularly limited. At this time, when arranging the connection part 20 that connects the discharge pipe 11a of the compressor 11 and the refrigerant pipe 10 directly above the recess 172, it is also necessary to consider the positional relationship between the leg 11c and the connection part 20. In other words, when the compressor 11 is viewed from above, if the leg 11c and the connecting part 20 overlap, the fluorescent agent leaking from the connecting part 20 will drip and adhere to the leg 11c, resulting in the The fluorescent agent no longer stays in the recess 172. Therefore, as shown in FIG. 7(b), it is desirable that the connecting portion 20 be placed directly above the recess 172, avoiding a position directly above the leg 11c.

In conventional general heat source units, there were not many irregularities on the bottom plate, so even if a fluorescent agent was added to the refrigerating machine oil, if a large amount of refrigerant leaked, the dripping refrigerating machine oil and fluorescent agent would leak onto the bottom plate. spread over a wide area. Therefore, in conventional general heat source units, the area on the bottom plate that should be irradiated with ultraviolet rays becomes large, and it takes time to identify the leakage location. Furthermore, in conventional general heat source units, if the fluorescent agent spreads over a wide area, it may not be possible to identify the location of the refrigerant leak.

Therefore, in the first embodiment, the heat source unit 1 is provided with a bottom plate 17 having an uneven shape and having a bottom part 172a where the fluorescent agent stays. By using such a bottom plate 17, even if a large amount of refrigerating machine oil and fluorescent agent leak out, the range in which the refrigerating machine oil and fluorescent agent can flow is restricted due to the uneven shape of the bottom plate 17. In other words, the refrigerating machine oil and the fluorescent agent dripped toward the recess 172 stay at the bottom 172a of the recess 172, as shown by area A in FIG. Further, the refrigerating machine oil and the fluorescent agent dripped toward the convex portion 171 are first received by the flat main surface portion 171a of the convex portion 171. Then, it flows into the recess 172 along the inclined surface 171b adjacent to the main surface 171a, and stays at the bottom 172a of the recess 172, as shown by area A in FIG. In this way, in the first embodiment, by using the uneven bottom plate 17, the refrigerating machine oil and the fluorescent agent are prevented from spreading over a wide area of the bottom plate 17. Therefore, in the bottom plate 17, the area where ultraviolet rays need to be irradiated when performing an inspection to identify a leakage point is narrowed, and the leakage point can be easily identified. Specifically, the movement of the fluorescent agent staying in the bottom portion 172a in the X direction is restricted by the inclined surface portion 172b of the recess 172. Therefore, the service person only has to irradiate the ultraviolet rays in the Y direction along the recess 172 of the bottom plate 17, and can efficiently detect the location where the fluorescent agent is attached. Further, since the refrigerant leakage point is located directly above or near the point directly above the location where the fluorescent agent is attached, the refrigerant leakage location can also be efficiently and reliably detected. Furthermore, even when the fluorescent agent flows from the convex portion 171 toward the recessed portion 172, since the fluorescent agent is attached along the direction in which the fluorescent agent flows, by tracing that direction in the opposite direction, the refrigerant can be removed. Leak points can be identified immediately.

As described above, in the first embodiment, by using the bottom plate 17 having an uneven shape in the heat source unit 1, the spots where refrigerant, refrigeration machine oil, and fluorescent agent accumulate in the event of a refrigerant leak can be reduced to the uneven shape of the bottom plate 17. This enables early identification of refrigerant leak locations. In other words, when the fluorescent agent leaked together with the refrigerant drips onto the bottom plate 17, the fluorescent agent is blocked by the inclined surface portion 172b of the recess 172, and its movement in the X direction is restricted. As a result, the fluorescent agent moves within the recess 172 only in the Y direction. Therefore, by irradiating ultraviolet rays along the recessed portion 172, the location of the refrigerant leak can be identified. In this way, in the first embodiment, the range to be irradiated with ultraviolet rays can be narrowed down to the concave portion 172 and its surroundings, so the range to be irradiated with ultraviolet rays is significantly smaller than in the past, and it can be done efficiently and in a short time. The location of the refrigerant leak can be identified. In addition, by locating refrigerant circuit components with a high risk of refrigerant leakage on the maintenance panel 1b side of the heat source unit 1, the refrigerant will leak in a position where it can be easily seen by service personnel, making it easier to discover the source of refrigerant leakage. .

Embodiment 2.
The configuration of the heat source unit provided in the refrigeration cycle apparatus according to the second embodiment will be explained using FIGS. 8 to 10. FIG. 8 is a plan view showing the installation environment of the heat source unit provided in the refrigeration cycle device according to the second embodiment. FIG. 9 is a plan view showing the installation environment of the heat source unit provided in the refrigeration cycle device according to the second embodiment. FIG. 10 is a perspective view showing the installation environment of the heat source unit provided in the refrigeration cycle device according to the second embodiment.

The configuration and operation of the refrigeration cycle device 100 and the heat source unit 1 according to the second embodiment are basically the same as those of the first embodiment, so below, the features of the second embodiment will be mainly explained. Descriptions of features common to Embodiment 1 will be omitted here.

Hereinafter, an example of the refrigeration cycle device 100 according to the second embodiment will be described. Locations where refrigerant leaks in the heat source unit 1 include the compressor 11, which is a source of vibration due to driving, and the piping and refrigerant circuit components connected to the compressor 11. Furthermore, connection parts 20 (see FIG. 7), such as brazed parts and flare joints, which connect the refrigerant pipes 10, often lead to refrigerant leakage.

The plan view in FIG. 8 shows an example of the configuration of the heat source unit 1. In FIG. 8, a plan view of the bottom plate 17 of the heat source unit 1 is shown. The service space 18 shown in FIG. 8 is a space for performing maintenance such as replacing refrigerant circuit components. The service space 18 is a part of the installation surface on which the heat source unit 1 is installed, and is arranged outside the maintenance panel 1b of the heat source unit 1. The service person uses the service space 18 to remove the maintenance panel 1b of the heat source unit 1 and replace the refrigerant circuit components when inspecting the refrigerant circuit components mounted on the heat source unit 1.

As shown in FIGS. 9 and 10, when installing the heat source unit 1, a service space 18 is provided on the Y1 side of the heat source unit 1 in the Y direction. That is, the building wall 30 or the like that would be an obstacle is not placed close to the maintenance panel 1b placed in front of the heat source unit 1. Specifically, the heat source unit 1 is installed while securing a space at least a preset distance L1 from the maintenance panel 1b of the heat source unit 1. A space longer than the distance L1 becomes the service space 18. The service space 18 is a space for service personnel to perform maintenance and other work, but also functions as a ventilation space.

Similarly, building walls 31 and the like that would be obstacles are not placed close to the left and right side surfaces and the back of the heat source unit 1. Specifically, the heat source unit 1 is installed by securing a space at least a preset distance L2 from the exterior panel 1a on the back surface of the heat source unit 1. The space longer than the distance L2 becomes the ventilation space 19A. Further, the heat source unit 1 is installed with a space of a predetermined distance L3 or more secured from the left and right exterior panels 1a of the heat source unit 1. A space longer than the distance L3 becomes a ventilation space 19B. The distance L1 is, for example, 450 mm. The distance L2 is, for example, 300 mm. The distance L3 is, for example, 100 mm. These values are just examples and are not particularly limited.

In the second embodiment, near the service space 18 of the heat source unit 1, a compressor 11, which is an excitation source, and a device having a connection part 20, such as a flare connection part, are arranged. As mentioned above, the following four locations are particularly likely to cause refrigerant leakage.

(1) Compressor 11
(2) Refrigerant pipe 10 connected to compressor 11
(3) Refrigerant circuit parts connected to the compressor 11 (4) Connection parts 20 such as brazed parts and flare connections

Therefore, in the second embodiment, these (1) to (4) are arranged near the service space 18. Specifically, these (1) to (4) are arranged inside the heat source unit 1 on the maintenance panel 1b side. A plurality of refrigerant circuit components including a compressor 11 are arranged inside the heat source unit 1. At least two of the plurality of refrigerant circuit components are connected by refrigerant piping 10 via a connecting portion 20 such as a flared connecting portion or a brazed portion. For example, a compressor 11, an accumulator 21 (see FIG. 11), an oil regulator 22 (see FIG. 11), an oil separator 23 (see FIG. 11), a dryer 24 (see FIG. 11), etc. are arranged in the heat source unit 1. Let's take an example to explain the case. At least two of these plurality of refrigerant circuit components are connected by refrigerant piping 10 via a connection part 20 such as a flare connection part or a brazed part. For example, assume that the accumulator 21 and the oil regulator 22 are connected via the connecting portion 20. The combination of refrigerant circuit components connected via the connection portion 20 is not particularly limited. In that case, the connection section 20 falls under (4) above. In the second embodiment, the above (1) to (4) where refrigerant leakage is likely to occur are located on the maintenance panel 1b side. With this configuration, when a serviceman removes the maintenance panel 1b during inspection, he can simply check to see if there is any fluorescent agent attached to the area R1 in FIG. 8 near the maintenance panel 1b. The fluorescent agent attached to the bottom plate 17 can be found immediately. This allows service personnel to detect refrigerant leaks at an early stage.

Additionally, if the service engineer finds fluorescent material attached to the bottom plate 17, he or she can irradiate ultraviolet light along the recess 172 of the bottom plate 17 using an ultraviolet lamp in order to identify the location of the refrigerant leak. Therefore, the service person does not have to irradiate the entire bottom plate 17 with ultraviolet rays, so the work load is reduced. This will be explained by giving a concrete example. For example, it is assumed that when a service person checks the area R1 in FIG. 8 near the maintenance panel 1b, a fluorescent agent has adhered to the area R2 shown in FIG. 8 within the area R1. In that case, the service person uses an ultraviolet lamp to irradiate ultraviolet light along the recess 172 including the area R2, as shown by the area R3 in FIG. By doing so, the location of the refrigerant leak can be efficiently identified.

As described above, the number of refrigerant circuit components arranged inside the heat source unit 1 is large, and the shape of the refrigerant piping 10 is also complicated. Therefore, inside the heat source unit 1, on the Y2 side in the Y direction, the refrigerant circuit components or the refrigerant pipe 10, etc. become visual obstacles, making it difficult to find the fluorescent agent. On the other hand, inside the heat source unit 1, there are no visual obstacles on the Y1 side in the Y direction, so it is easy to find the fluorescent agent. Therefore, in the second embodiment, by arranging the above items (1) to (4) where refrigerant leakage is likely to occur on the maintenance panel 1b side, it is possible for a service person to detect refrigerant leakage at an early stage.

Furthermore, in the heat source unit 1 according to the second embodiment, exterior panels 1a are arranged on the left and right sides and the back surface of the heat source unit 1. Since these exterior panels 1a can prevent sunlight from entering the heat source unit 1, the inside of the heat source unit 1 can be kept in a dark state. Thereby, the refrigerant circuit components mounted in the heat source unit 1 are placed in the shade. Therefore, by irradiating the bottom plate 17 with an ultraviolet lamp, it is possible to efficiently check whether or not the fluorescent agent is attached.

Note that a control box (not shown) is further arranged inside the heat source unit 1. The control box houses a drive circuit and a control circuit for driving the compressor 11 and the blower fan 15, and the like. The control box does not need to be placed on the service space 18 side because it does not become a refrigerant leakage point. Therefore, the control box may be arranged on the back side of the maintenance panel 1b of the heat source unit 1, that is, on the Y2 side in the Y direction inside the heat source unit 1. Further, the control box may be arranged on the Z1 side of the compressor 11 or the accumulator (see FIG. 11) in the Z direction. That is, the control box may be placed above the compressor 11 or the accumulator 21 (see FIG. 11). As described above, there is no problem in arranging components such as the control box, which do not allow refrigerant to leak or are difficult to leak, one on top of the other in the Z direction. However, it is better to avoid arranging parts that are prone to leakage of refrigerant, such as the connecting portion 20, directly above parts such as the compressor 11 or the accumulator 21. The reason for this is that when the refrigerant leaks, the fluorescent agent will adhere to components such as the compressor 11 or the accumulator 21 and will not drip into the recess 172. The service person checks whether there is a fluorescent agent in the recess 172, but basically does not check whether the fluorescent agent is attached to other parts. Furthermore, as shown in FIGS. 3 and 11, components such as the compressor 11 or the accumulator 21 have a more complex structure than the bottom plate 17, and there is a possibility that the fluorescent agent may adhere to positions that are difficult for service personnel to see. There is. Therefore, when the fluorescent agent adheres to parts such as the compressor 11 or the accumulator 21, it is difficult for a service person to discover the fluorescent agent, and there is a concern that the service person may overlook the fluorescent agent. On the other hand, it is possible to arrange two or more connecting parts 20 one on top of the other in the Z direction. To explain using the example of FIG. 7B, another connecting portion 20B may be arranged so as to overlap in the Z direction with respect to the connecting portion 20A placed directly above the recess 172. When piping a large number of refrigerant pipes 10, it is assumed that a plurality of connection parts 20 inevitably overlap in the Z direction due to space constraints. In that case, when the refrigerant leaks from any one of the plurality of

connections

20A and 20B, the fluorescent agent drips into the recess 172 located directly below the

connections

20A and 20B. If the service engineer discovers that the fluorescent agent has adhered to the recess 172, he or she infers that the refrigerant is leaking from one of the plurality of

connections

20A and 20B located directly above the recess 172. It is possible to do so. In that case, the service person can identify the location of the refrigerant leak by sequentially checking the plurality of

connections

20A and 20B one by one. Therefore, it is permissible to arrange two or more connecting portions 20 one above the other in the Z direction.

As described above, in the second embodiment, the above (1) to (4) where refrigerant leakage is likely to occur are arranged on the maintenance panel 1b side. Therefore, when a serviceman removes the maintenance panel 1b during inspection, he can immediately find the fluorescent agent attached to the bottom plate 17. This allows service personnel to detect refrigerant leaks at an early stage.

Embodiment 3.
FIG. 11 is a plan view showing an example of the configuration of a heat source unit provided in the refrigeration cycle device according to the third embodiment.

The configuration and operation of the refrigeration cycle device 100 and the heat source unit 1 according to the third embodiment are basically the same as those of the first embodiment, so below, the features of the third embodiment will be mainly explained. Descriptions of features common to Embodiment 1 will be omitted here.

As shown in FIG. 11, many parts such as a compressor 11, an accumulator 21, an oil regulator 22, an oil separator 23, and a dryer 24 are arranged inside the heat source unit 1.

The accumulator 21 is connected, for example, to the suction pipe 11b of the compressor 11 (see FIG. 7). The accumulator 21 is a container that stores refrigerant. The accumulator 21 has a function of storing surplus refrigerant. Further, the accumulator 21 may further have a function of separating the gas refrigerant and the liquid refrigerant in order to prevent a large amount of liquid refrigerant from returning to the compressor 11.

The oil regulator 22 takes out the refrigerating machine oil in the accumulator 21 and supplies it to the compressor 11.

The oil separator 23 is connected to, for example, the discharge pipe 11a of the compressor 11 (see FIG. 7). Refrigerating machine oil used in the compressor 11 mixes with the high temperature and high pressure refrigerant discharged from the compressor 11 and circulates within the refrigerant circuit. Although an oil separator is not required for a compressor that discharges a small amount of refrigerating machine oil, an oil separator 23 is arranged for a compressor that discharges a large amount of refrigerating machine oil. When a large amount of refrigerating machine oil flows into the condenser 12 and evaporator 14, the heat transfer effect of the condenser 12 and evaporator 14 is reduced. In addition, if the amount of refrigerant circulating in the refrigerant circuit is insufficient, or if refrigerating machine oil stays in the refrigerant circuit, there will be insufficient refrigerating machine oil returning from the refrigerant circuit to the compressor 11, causing the compressor 11 to seize up. It causes Therefore, the oil separator 23 separates the refrigerating machine oil from the refrigerant discharged by the compressor 11 and returns it to the compressor 11.

In the third embodiment, two or more of the refrigerant circuit components that are likely to cause refrigerant leakage among the components mounted on the heat source unit 1 are arranged with respect to the Y direction, which is the extending direction of the recess 172 of the bottom plate 17. , arranged orthogonally or substantially orthogonally.

Specifically, at least two refrigerant circuit components of the compressor 11, the accumulator 21, the oil regulator 22, and the oil separator 23 are arranged side by side in the X direction as shown by the dashed line B in FIG. Due to this arrangement, the extending directions of the connecting portions 20 and the refrigerant pipes 10 that connect two or more refrigerant circuit components arranged side by side are orthogonal or approximately orthogonal to the Y direction, which is the extending direction of the recesses 172. Thereby, the fluorescent agent leaking from the connecting portion 20 and the refrigerant pipe 10 remains within the recess 172 and does not spread toward the X direction of the bottom plate 17. Therefore, the refrigerant leak location where the refrigerant leak has occurred can be easily specified. Furthermore, as a result, it is possible to easily identify the refrigerant circuit component that caused the refrigerant leak.

In particular, it is desirable that one or more of the accumulator 21, the oil regulator 22, and the oil separator 23 and the compressor 11 be arranged so as to be perpendicular or substantially perpendicular to the concave portion 172 and the convex portion 171. The reason for this is that, as shown in (2) and (3) above, the refrigerant circuit components connected to the compressor 11 and the refrigerant piping 10 connected to the compressor 11 are particularly susceptible to refrigerant leakage. This is because it is a place where it is likely to occur. Note that here, "substantially orthogonal" includes a direction in which the angle deviates from orthogonal within a range that does not impede the identification of the leaking location of the fluorescent agent when refrigerant leakage occurs. Note that at least one of the accumulator 21, the oil regulator 22, and the oil separator 23 may be referred to as a first device 25 (see FIG. 13).

In FIG. 11, the compressor 11 and the oil regulator 22 are arranged in the X direction. The compressor 11 and the oil regulator 22 are connected via a refrigerant pipe 10. Therefore, the connection direction between the compressor 11 and the oil regulator 22 is the X direction, which is orthogonal to the Y direction. However, the combination of refrigerant circuit components arranged side by side in the X direction is not limited to this, and may include the compressor 11 and accumulator 21, the compressor 11 and oil separator 23, or the compressor 11 and accumulator 21 and oil separator 23. It may be a combination like this.

As described above, in the third embodiment, at least one refrigerant circuit component of the accumulator 21, the oil regulator 22, and the oil separator 23 is installed inside the heat source unit 1 as the first device 25 (see FIG. 13). ). The compressor 11 and the first device 25 are arranged side by side in the X direction, and the compressor 11 and the first device 25 are connected via the refrigerant pipe 10. At this time, the compressor 11, the first device 25, the refrigerant pipe 10 connecting the compressor 11 and the first device 25, or the connecting portion 20 connecting the compressor 11 and the first device 25 are arranged in the X direction. are placed side by side. Therefore, even if refrigerant leakage occurs at any of these locations, the fluorescent agent leaked together with the refrigerant will remain in the recess 172 and will not spread in the X direction on the bottom plate 17. Therefore, the service person can easily and efficiently identify the location of the refrigerant leak and the refrigerant circuit component that caused the refrigerant leak.

Embodiment 4.
FIG. 12 is a perspective view showing an example of the configuration of a heat source unit provided in the refrigeration cycle device according to the fourth embodiment.

The configuration and operation of refrigeration cycle device 100 and heat source unit 1 according to Embodiment 4 are basically the same as those of Embodiment 1, so below, the features of Embodiment 4 will be mainly explained. Descriptions of features common to Embodiment 1 will be omitted here.

As shown in FIG. 12, in the fourth embodiment, a dividing wall 175 is provided inside the groove-shaped recess 172. The dividing wall 175 is a plate-shaped member extending in the X direction, and is arranged parallel to the XZ plane. The dividing wall 175 may have a flat plate shape, but as shown in FIG. 12, the plate thickness may increase toward the Z2 side in the Z direction. In that case, the cross-sectional shape indicating the plate thickness of the dividing wall 175 is triangular, trapezoidal, wedge-shaped, or the like. Both ends of the dividing wall 175 in the X direction are joined to the inclined surface portion 172b of the recess 172. Further, the dividing wall 175 is erected from the bottom surface 172a of the recess 172 on the Z1 side in the Z direction. The dividing wall 175 divides the inside of the recess 172 into two blocks aligned in the Y direction.

Note that in FIG. 12, one dividing wall 175 is provided in the recess 172, and the inside of the recess 172 is divided into two blocks, but the invention is not limited to this case. That is, two or more dividing walls 175 may be provided in the recess 172, and the inside of the recess 172 may be divided into three or more blocks. The larger the number of blocks, the more accurately the refrigerant leak location can be identified.

As described above, in the fourth embodiment, the dividing wall 175 is installed inside the groove-shaped recess 172. Even if a large amount of refrigerating machine oil and fluorescent agent leaks out, the installation of the dividing wall 175 of the bottom plate 17 prevents the refrigerating machine oil and fluorescent agent from flowing in the Y direction inside the recess 172 because it is blocked by the dividing wall 175. Can not. As described above, in the fourth embodiment, by installing the dividing wall 175, the restrictions on the range through which the refrigerating machine oil and the fluorescent agent flow are even greater than in the first to third embodiments. Therefore, the range that requires ultraviolet irradiation when identifying a refrigerant leakage point is further narrowed, and the refrigerant leakage point can be identified even more easily. Furthermore, the larger the number of dividing walls 175, the greater the restriction on the outflow range, which makes detection easier.

Note that in the example of FIG. 12, a case is described in which a dividing wall 175 is provided in the recess 172 shown in FIG. 6(a). However, the invention is not limited to that case, and a dividing wall 175 may be provided for the recess 172 shown in FIG. 5 or 6(b). Even in that case, since the bottom surface 172a of the recess 172 is divided into two or more blocks in the Y direction, it is possible to suppress the refrigerating machine oil and the fluorescent agent from flowing widely in the Y direction, thereby identifying the location of the refrigerant leak. is easy.

Embodiment 5.
FIG. 13 is a plan view schematically showing an example of the configuration of the bottom plate of the heat source unit according to the fifth embodiment. The arrangement density of the groove-shaped recesses 172 may be different for each region by dividing the bottom plate 17 into a plurality of regions. In the fifth embodiment, an example will be described in which the bottom plate 17 is divided into a plurality of regions, and the arrangement density of the groove-shaped recesses 172 is made different for each region. Note that the number of regions into which the bottom plate 17 is divided is not particularly limited, and may be determined as appropriate.

The configuration and operation of the refrigeration cycle device 100 and the heat source unit 1 according to the fifth embodiment are basically the same as those of the first embodiment, so below, the features of the fifth embodiment will be mainly explained. Descriptions of features common to Embodiment 1 will be omitted here.

As shown in FIG. 13A, in the fifth embodiment, in the bottom plate 17, a first region 170a in which the recesses 172 are arranged at a first density, and a second region 170b in which the recesses 172 are arranged at a second density. and are provided. The second density is higher than the first density. Here, the arrangement density is the ratio of the area where the recesses 172 are formed to the area of the entire upper surface 17a of the bottom plate 17. Therefore, the arrangement density may indicate the ratio of the formation area of the recesses 172 to the formation area of the projections 171 and the ratio of the number of recesses 172 to the number of projections 171.

As described above, a plurality of refrigerant circuit components including the compressor 11 are arranged inside the heat source unit 1. Furthermore, at least two of the plurality of refrigerant circuit components are connected to each other by the refrigerant pipe 10 via the connecting portion 20 .

As described in the third embodiment above, at least one refrigerant circuit component among the accumulator 21, the oil regulator 22, and the oil separator 23 is installed as the first device 25 inside the heat source unit 1. ing. As shown in FIG. 13, the compressor 11 and the first device 25 are arranged side by side in the X direction, and the compressor 11 and the first device 25 are connected via the refrigerant pipe 10 and the connection part 20. There is. At this time, the compressor 11, the refrigerant pipe 10, and the connection section 20 are arranged directly above the second region 170b. In the second region 170b, a larger number of recesses 172 are arranged than in the first region 170a. Therefore, when refrigerant leakage occurs in the second region 170b, the refrigerating machine oil and the fluorescent agent remain within one of the recesses 172 and do not spread. As a result, the location of the refrigerant leak can be easily identified.

In the case of FIG. 13(a), as shown in FIG. 13(a), the second region 170b is arranged on the maintenance panel 1b side, and the first region 170a where the arrangement density of the recesses 172 is small is arranged in the heat source unit 1. It is desirable to arrange it on the Y2 side in the Y direction.

Although the example of FIG. 13(a) shows a case where the bottom plate 17 is provided with two regions, the first region 170a and the second region 170b, the present invention is not limited to that case. 13(b) and 13(c) show a case where the bottom plate 17 is provided with three regions: a first region 170a, a second region 170b, and a third region 170c. The arrangement density of the recesses 172 in these three regions is as follows.

First density of first region 170a: Normal Second density of second region 170b: Dense Third density of third region 170c: Sparse

In this way, in the examples of FIGS. 13(b) and 13(c), the second density is the largest and the third density is the smallest.

In the case of FIG. 13(b), as shown in FIG. 13(b), the second region 170b is arranged on the maintenance panel 1b side, and the third region 170c is arranged on the Y2 side in the Y direction inside the heat source unit 1. is desirable. Further, the first region 170a is arranged side by side with the second region 170b in the X direction, for example.

Similarly, in the case of FIG. 13(c), the second region 170b is arranged on the maintenance panel 1b side, and the third region 170c is arranged on the Y2 side in the Y direction inside the heat source unit 1. It is desirable to place Further, the first region 170a is arranged side by side in the X direction with respect to the second region 170b and the third region 170c, for example.

Note that FIGS. 13A to 13C are merely examples, and the number of regions provided on the bottom plate 17 may be changed as appropriate. Further, the arrangement of regions provided on the bottom plate 17 may be changed as appropriate. In addition, when the first density of the first region 170a is "normal" and the third density of the third region 170c is "sparse", an example of parts arranged in the first region 170a and the third region 170c is as follows. It is shown below.
Examples of parts placed in the first region 170a: refrigerant pipes that are not connected by brazing or the like. Refrigerant piping without a connection part 20. Regarding the refrigerant pipe, there is no leakage point unless there is a hole in the refrigerant pipe itself. In this way, since the refrigerant pipes that are not connected by brazing or the like require less maintenance, they may be arranged on the Y2 side in the Y direction, regardless of the arrangement density of the recesses 172.
Examples of parts placed in the third area 170c: parts not directly related to refrigerant, such as control boxes and electrical parts.

As described above, in the fifth embodiment, in the corrugated bottom plate 17, the arrangement density of the recesses 172 in the locations where the compressor 11 or the connecting portion 20, etc. are arranged, where refrigerant leakage is likely to occur, is Make it denser than the parts. This makes it easier to identify the leak location in the X direction perpendicular to the recess 172 where refrigerant leaks are likely to occur, making leak detection easier. Note that the arrangement density of the concave portions 172 in locations where the risk of refrigerant leakage is low may be less dense than in other portions in order to improve the workability of the bottom plate 17. That is, the bottom plate 17 may have three types of arrangement density: dense, normal, and sparse.

Additionally, the width or depth of the groove of the recess 172 may be changed depending on the amount of refrigerant leakage. For example, in locations where refrigerant leaks are likely to occur, such as the compressor 11 or the connection portion 20, the width of the recess 172 in the X direction may be increased or the depth of the recess 172 may be increased to prevent the fluorescent agent from flowing out. May be suppressed. Note that adjusting the arrangement density of the recesses 172 or adjusting the width and depth of the recesses 172 is effective if either one is adopted, but it is even more effective if these adjustments are combined.

Embodiment 6.
As described above using FIG. 4, the bottom plate 17 is provided with drain holes 173 at both the end on the Y1 side and the end on the Y2 side in the Y direction. However, it is not limited to this. In Embodiment 6, a case will be described in which a drain hole 173 is provided at either the end on the Y1 side or the end on the Y2 side in the Y direction.

The drain hole 173 may cause the fluorescent agent to flow together with the drain water. Therefore, in the recessed portion 172, the drain hole 173 is provided only at either the end on the Y1 side or the end on the Y2 side in the Y direction. Furthermore, the drain hole 173B formed between the end on the Y1 side and the end on the Y2 side in the Y direction of the recess 172 shown in FIG. 4 is not formed in the sixth embodiment. Thereby, it is possible to suppress the fluorescent agent from flowing out through the drainage hole 173. Note that in the convex portion 171, the water drainage hole 173A is not so important with respect to the outflow of the fluorescent agent. Therefore, in the convex portion 171, as shown in FIG. 4, a hole 173A for draining water may be provided.

Embodiment 7.
As shown in FIG. 3 above, in the heat source unit 1, the lower end 12a of the condenser 12 does not reach the bottom plate 17, and there is a space between the bottom plate 17 and the lower end 12a of the condenser 12 in the Z direction. It is desirable that there is a gap between the two. In the example of FIG. 3, a distance L4 is provided between the bottom plate 17 and the lower end 12a of the condenser 12 in the Z direction. Specifically, the support member 1d functions as a spacer for forming the distance L4.

If the lower end 12a of the condenser 12 extends to the bottom plate 17, the fluorescent agent may be affected by the suction of outside air by the blower fan 15 through the condenser 12, and the position at which the fluorescent agent is dropped may be shifted. As described above, in the heat source unit 1, when the blower fan 15 is driven, outside air is sucked into the heat source unit 1 from the air intake port provided in the exterior panel 1a. Then, the outside air passes through the condenser 12 and flows through the heat source unit 1 toward the Z1 side in the Z direction. Therefore, an airflow is generated within the heat source unit 1 that flows from the Z2 side toward the Z1 side in the Z direction. At this time, if the lower end 12a of the condenser 12 extends to the bottom plate 17, the fluorescent agent leaking together with the refrigerant will be swept away by the airflow and will then drop toward the bottom plate 17. Therefore, there is a possibility that the position where the fluorescent agent is dropped may be shifted from directly below the leakage location.

Therefore, in the first to seventh embodiments, in the heat source unit 1, the lower end 12a of the condenser 12 does not reach the bottom plate 17, and there is a space between the bottom plate 17 and the lower end 12a of the condenser 12 in the Z direction. The configuration is such that there is an interval of distance L4 between the two. Further, a support member 1d is installed as a spacer to form a distance L4. Since the support member 1d is not provided with an intake port for taking in outside air, outside air does not flow into the heat source unit 1 from the support member 1d. As shown in FIG. 3, most of the refrigerant circuit components in the heat source unit 1 are arranged at the lower part of the heat source unit 1, so by providing the support member 1d, the airflow by the ventilation fan 15 is reduced with respect to the dropping of the fluorescent agent. has almost no effect. Therefore, since the leaked fluorescent agent is dropped directly below the leakage point, a service person can quickly find the leakage point.

Note that "there is a gap" more precisely means that there is a gap between the main surface portion 171a of the convex portion 171 of the bottom plate 17 and the lower end portion 12a of the condenser 12. Furthermore, "there is a gap" includes both a state in which the condenser 12 is not fixed to the bottom plate 17 and a state in which the condenser 12 is arranged on the support member 1d arranged on the bottom plate 17. . In addition, although the example in which the condenser 12 is arranged on the support member 1d is shown here, it is not limited to that case, and other members other than the support member 1d may be used.

Embodiment 8.
FIG. 16 is an explanatory diagram schematically showing an example of the configuration of the bottom plate of the heat source unit according to Embodiment 8.

The configuration and operation of the refrigeration cycle device 100 and the heat source unit 1 according to the eighth embodiment are basically the same as those of the first embodiment, so below, the features of the eighth embodiment will be mainly explained. Descriptions of features common to Embodiment 1 will be omitted here.

In the first to seventh embodiments described above, the shape of the bottom plate 17 is an uneven shape in which the cross-sectional shape when viewed in the Y direction is a straight line or a substantially straight line, but the present invention is not limited thereto. That is, the bottom plate 17 may have any shape as long as the fluorescent agent does not flow in the X direction parallel to the maintenance panel 1b. Specifically, the bottom plate 17 may have a concavo-convex shape having a wavy shape made of curved lines, as shown in FIG. 16(a) or FIG. 16(b). Alternatively, the bottom plate 17 may have an uneven shape that is composed of a dimpled surface having a plurality of dimple-shaped recesses, as shown in FIG. 16(c). When the bottom plate 17 has a wavy shape, the cross-sectional shape of the bottom plate 17 is composed of one or more types of curves, as shown in FIGS. 16(a) and 16(b), for example. In the case of FIG. 16A, the width of the recess 172 in the X direction and the width of the protrusion 171 in the X direction are the same. On the other hand, in the case of FIG. 16(b), the width of the concave portion 172 in the X direction is smaller than the width of the convex portion 171 in the X direction. The width of the recess 172 in the X direction and the width of the protrusion 171 in the X direction are not particularly limited and may be determined as appropriate. The other configurations when the bottom plate 17 has a wavy shape are the same as in the first embodiment.

Further, when the bottom plate 17 has an uneven shape consisting of a dimple-formed surface, as shown in FIG. A plurality of recesses 172A are formed. In this case, the region where the dimple-shaped recess 172A is not provided becomes the convex portion 171. The dimple-shaped recess 172A may be formed from a hemispherical depression, or may be formed from a curved surface having a cylindrical shape or a U-shaped cross section. As shown in FIG. 16(c), the plurality of dimple-shaped recesses 172A are arranged in a row along the Y direction at intervals. Further, the number of rows constituted by the plurality of dimple-shaped recesses 172A may be one or more. Each of the one or more columns extends in the Y direction, as shown in FIG. 16(c). The rows are spaced apart from each other in the X direction. In other words, in the eighth embodiment, a plurality of dimple-like recesses 172A arranged in a row are arranged in place of each of the groove-like recesses 172 shown in the first embodiment. Further, the arrangement density of the dimple-shaped recesses 172A, that is, the arrangement density of the rows of the dimple-shaped recesses 172A, is determined by dividing the bottom plate 17 into a plurality of regions and The arrangement density of the dimples may be made different. In the example of FIG. 16(c), in the first region 170a, the interval between adjacent dimple-shaped recesses 172A in the Y direction is larger than in the second region 170b. Furthermore, in the first region 170a, the number of rows of dimple-shaped recesses 172A is smaller than in the second region 170b. FIG. 16(c) is just an example, and the present invention is not limited thereto. Note that when the dimple-shaped recess 172A is formed on the upper surface portion 17a of the bottom plate 17, the dimple-shaped recess 172A is a circular depression in plan view, so the fluorescent agent is absorbed into the dimple-shaped recess 172A as shown in area A. It is retained in the bottom part 172a at the lower center of the recessed part 172A. The fluorescent agent staying in the bottom part 172a is restricted from moving in the X direction and the Y direction by the inner wall surface forming the side surface of the dimple-shaped recess 172A, and stays in the dimple-shaped recess 172A. Note that the arrangement density of the dimple-shaped recesses 172A, that is, the arrangement density of the rows of the dimple-shaped recesses 172A is not limited to the above description, but may be arranged on the upper surface of the bottom plate 17, for example, like a polka dot pattern. It may be uniform over the entire surface of 17a.

In addition, regardless of the shape of the bottom plate 17, the ratio of the concave portions 172 to the convex portions 171, the number of the concave portions 172 and the convex portions 171, the size and depth of the concave portions 172, etc. are not particularly limited, and may be determined as appropriate. You may decide.

Embodiment 9.
FIG. 14 is a sectional view schematically showing an example of the configuration of a heat source unit provided in a refrigeration cycle device according to Embodiment 9.

The configuration and operation of the refrigeration cycle device 100 and the heat source unit 1 according to the ninth embodiment are basically the same as those of the first embodiment, so below, the features of the ninth embodiment will be mainly explained. Descriptions of features common to Embodiment 1 will be omitted here.

In the first to eighth embodiments described above, the case where the bottom surface 172a of the recess 172 is a plane parallel to the XY plane has been described, but the present invention is not limited to that case. That is, as shown in FIG. 14, the bottom portion 172a of the groove-shaped recess 172 may be sloped. Specifically, as shown in FIG. 14, the bottom surface portion 172a of each recess 172 is inclined in the Y direction from the Y2 side toward the Y1 side and becomes lower toward the maintenance panel 1b.

Further, as shown in FIG. 14, each recess 172 has a stopper 172c on the Y1 side in the Y direction to stop the fluorescent agent from flowing down. The stopper 172c is erected from the bottom surface 172a of the recess 172 toward the Z1 side in the Z direction. The fluorescent agent leaked together with the refrigerant flows down along the bottom surface 172a of the recess 172. At this time, the fluorescent agent comes into contact with the stopper 172c and is stopped. As a result, the fluorescent agent remains at the stopper 172c. By removing the maintenance panel 1b and irradiating only the Y1 side end of each recess 172 with ultraviolet rays, the service person can check whether fluorescent agent is attached to all the recesses 172. If there is a recess 172 to which the fluorescent agent is attached, by irradiating ultraviolet rays along the recess 172, the location of the refrigerant leak can be discovered.

In Embodiment 9, the bottom surface 172a of the recess 172 is inclined so that the front side is lower than the back side, and has a shape that blocks the fluorescent agent at the lowest point. In this case, the moment the service person opens the maintenance panel 1b, the presence or absence of refrigerant leakage can be confirmed, and the location of the fluorescent agent leakage in the X direction along the maintenance panel 1b can be identified at an early stage.

Embodiment 10.
FIG. 15 is a side view schematically showing an example of the configuration of the bottom plate of the heat source unit according to the tenth embodiment. In the bottom plate 17 according to the first to ninth embodiments, a convex portion 171 is provided in a region where the groove-like recess 172 or the dimple-like recess 172A is not provided. At this time, a fluorescent agent retention member 171c made of a mesh-like net material or an absorbent material may be provided over the entire main surface portion 171a of the convex portion 171, as shown in FIG. When a mesh-like net material is provided on the main surface 171a of the convex portion 171 as the fluorescent agent retention member 171c, the fluorescent agent leaked together with the refrigerant is caught in the net of the mesh-like net material, and the fluorescent agent leaked together with the refrigerant is caught at that position. Accumulate. Further, when an absorbing material is provided as the fluorescent agent retention member 171c on the main surface portion 171a of the convex portion 171, the fluorescent agent leaked together with the refrigerant is absorbed by the absorbing material. Therefore, the fluorescent agent dropped onto the main surface portion 171a of the convex portion 171 does not flow down into the recessed portion 172, but remains at the dropped position.

As described above, in Embodiment 10, at least one of a mesh-like net material and an absorbent material is provided on the main surface portion 171a of the convex portion 171 of the bottom plate 17 to retain or absorb the fluorescent agent. Locate the location of the leak. This further facilitates identification of the location of the refrigerant leak.

Note that the main surface portion 171a of the convex portion 171 of the bottom plate 17 may be provided with both a mesh-like net material and an absorbent material. Specifically, the main surface portion 171a of the convex portion 171 is first coated with an absorbent material. Next, a mesh material is applied on top of the absorbent material. As a result, the fluorescent agent is first restrained from flowing in the X direction and the Y direction by the mesh material. The fluorescent agent that has flowed down to the Z2 side in the Z direction through the mesh of the mesh material is absorbed by the absorbent material. As a result, the fluorescent agent is prevented from flowing further in the X direction and the Y direction, and remains at the position where it was dropped.

Further, when the convex portion 171 has the shape shown in FIG. 6(b), a fluorescent agent made of a mesh-like net material or an absorbing material is applied not only to the main surface portion 171a of the convex portion 171 but also to the inclined surface portion 171b. A retention member 171c may be provided.

1 heat source unit, 1a exterior panel, 1b maintenance panel, 1c upper surface, 1d support member, 2 load unit, 10 refrigerant piping, 11 compressor, 11a discharge pipe, 11b suction pipe, 11c leg, 12 condenser, 12a lower end , 13 expansion valve, 14 evaporator, 15 blower fan, 16 blower fan, 17 bottom plate, 17a top surface, 18 service space, 19A ventilation space, 19B ventilation space, 20 connection section, 20A connection section, 20B connection section, 21 accumulator , 22 oil regulator, 23 oil separator, 24 dryer, 25 first equipment, 30 wall, 31 wall, 100 refrigeration cycle device, 170a first area, 170b second area, 170c third area, 171 convex part, 171a main Surface part, 171b slope part, 171c fluorescent agent retention member, 172 recess (groove-shaped recess), 172A recess (dimple-shaped recess), 172a bottom part, 172b slope part, 172c stopper, 173 hole, 173A hole, 173B hole, 174 Notch, 175 Dividing wall, A area, B dashed line, L1 distance, L2 distance, L3 distance, L4 distance, R1 area, R2 area, R3 area.

Claims

A refrigeration cycle device comprising a refrigerant circuit in which a compressor, a condenser, an expansion valve, and an evaporator are connected by piping, and a refrigerant circulates through the piping,
A fluorescent agent added to refrigerating machine oil is circulated in the refrigerant circuit together with the refrigerant,
A bottom plate of a heat source unit in which the compressor and the condenser are installed has an uneven shape having a bottom portion where the leaked fluorescent agent stays when the refrigerant leaks from the refrigerant circuit.
Refrigeration cycle equipment.
The uneven bottom portion is arranged along a first direction that is a depth direction of the heat source unit, and restricts movement of the fluorescent agent in a second direction that is a width direction of the heat source unit.
The refrigeration cycle device according to claim 1.
The bottom plate has a plurality of groove-shaped recesses extending in a first direction that is a depth direction of the heat source unit,
The groove-shaped recesses are arranged side by side at intervals in a second direction that is the width direction of the heat source unit,
Each of the groove-shaped recesses has the bottom portion extending in the first direction.
The refrigeration cycle device according to claim 1 or 2.
The groove-shaped recess has a trapezoidal cross-sectional shape when viewed in the first direction,
The groove-shaped recess is
the bottom portion having a rectangular shape in plan view and extending in the first direction;
a sloped surface portion disposed at both ends of the bottom surface portion in the second direction and connected to the bottom surface portion;
Equipped with
The inclined surface portion is inclined outward from the bottom surface portion as it goes upward from the bottom surface portion.
The refrigeration cycle device according to claim 3.
The bottom plate has a plurality of dimple-shaped recesses arranged in a row in the first direction,
One or more rows constituted by the plurality of dimple-shaped recesses are arranged side by side at intervals in a second direction that is the width direction of the heat source unit,
Each of the plurality of dimple-shaped recesses has the bottom portion at a lower center thereof;
The refrigeration cycle device according to claim 1 or 2.
The heat source unit includes a maintenance panel that is removably attached to one of the side surfaces extending in a second direction that is the width direction of the heat source unit,
A plurality of refrigerant circuit components including the compressor are arranged inside the heat source unit,
At least two of the plurality of refrigerant circuit components are connected to the piping via a connection part,
The compressor and the connection part are arranged on the maintenance panel side,
The refrigeration cycle device according to any one of claims 1 to 5.
Inside the heat source unit, at least one refrigerant circuit component of an oil regulator, an accumulator, and an oil separator is installed as a first device,
The compressor and the first device are arranged side by side in a second direction that is the width direction of the heat source unit, and the compressor and the first device are connected via the piping,
The second direction is a direction perpendicular or substantially perpendicular to the first direction, which is the depth direction of the heat source unit.
The refrigeration cycle device according to any one of claims 1 to 6.
At least one of the groove-shaped recesses has a dividing wall that divides the inside of the groove-shaped recess into two or more blocks lined up in the first direction.
The refrigeration cycle device according to claim 3 or 4.
The bottom plate is
a first region in which the arrangement density of the recesses is a first density;
a second region in which the arrangement density of the recesses is a second density higher than the first density;
has
A plurality of refrigerant circuit components including the compressor are arranged inside the heat source unit,
At least two of the plurality of refrigerant circuit components are connected to the piping via a connection part,
The compressor and the connection part are arranged directly above the second region of the bottom plate,
The refrigeration cycle device according to any one of claims 3 to 5.
the condenser is arranged above the bottom plate,
A space is provided between the condenser and the bottom plate in the vertical direction;
The refrigeration cycle device according to any one of claims 1 to 9.
The heat source unit includes a maintenance panel that is removably attached to one of the side surfaces extending in a second direction that is the width direction of the heat source unit,
The bottom surface of the groove-shaped recess is inclined to become lower toward the maintenance panel along a first direction that is a depth direction of the heat source unit.
The refrigeration cycle device according to claim 3 or 4.
The bottom plate has a concave portion having the bottom surface portion, and a convex portion provided in an area where the concave portion is not formed,
At least one of a mesh net material and an absorbent material is provided on the main surface of the convex portion.
The refrigeration cycle device according to any one of claims 1 to 11.
A drainage hole for draining drain water generated in the condenser to the outside of the heat source unit is provided in at least one of both ends of the groove-shaped recess of the bottom plate in the first direction.
The refrigeration cycle device according to claim 3 or 4.