WO2016042690A1

WO2016042690A1 - Refrigeration facility

Info

Publication number: WO2016042690A1
Application number: PCT/JP2015/003143
Authority: WO
Inventors: 和馬横原; 水谷　和秀; 完池宮; 紀考亀井; 直宏田中
Original assignee: ダイキン工業株式会社
Priority date: 2014-09-16
Filing date: 2015-06-23
Publication date: 2016-03-24
Also published as: DK3168555T3; CL2017000633A1; US20170219270A1; JP5949864B2; EP3168555A1; CN106605113A; CN106605113B; JP2016061467A; EP3168555A4; EP3168555B1

Abstract

In a refrigeration facility, such as a refrigeration container, comprising a refrigeration device (10) that cools inside a compartment and has an evaporator (24) through which compartment air passes, corrosion of members provided in the compartment is suppressed as a result of: providing a drain water port (43) as a corrosive gas detection unit (50), in a drain hose (42) that discharges drain water from a drain pan (41) that receives the drain water generated by the evaporator (24); and investigating the drain water pH at the drain water port (43), by using a hydrogen ion index sensor (45), and detecting corrosive gas in the compartment air.

Description

Refrigeration equipment

The present invention relates to a refrigeration facility provided with a refrigeration apparatus for cooling the interior, and particularly to a technique for suppressing corrosion of members provided in the interior.

Conventionally, as a refrigeration facility provided with a refrigeration apparatus for cooling the inside of a warehouse, for example, a refrigeration container used for maritime transportation or the like is known. The refrigeration container includes a container refrigeration apparatus that cools the inside of the container body. In addition, refrigeration warehouses and refrigerated warehouses are also known as refrigeration equipment for cooling the inside of the warehouse.

Patent Document 1 discloses a container refrigeration apparatus. This container refrigeration apparatus is attached to the front opening of the container. The container refrigeration apparatus has a frame, and an outside storage space facing the outside is formed below the frame. In the outside storage space, a compressor, a condenser, an outside fan, and the like are installed. In addition, a storage space inside the container facing the interior of the container is formed on the upper side of the frame. An evaporator and an internal fan are installed in the internal storage space. In this container refrigeration apparatus, the compressor, the condenser, the evaporator, and the like are connected by a refrigerant pipe to form a refrigerant circuit. The refrigerant circulates in the refrigerant circuit to perform a refrigeration cycle, and the air in the container of the container is cooled by the evaporator.

JP 2004-325022 A

By the way, in a refrigerated container in which plants such as grapes are loaded, fumigation is performed for sterilization in the warehouse. By gas generated during this fumigation or gas volatilized from the sterilization sheet (SO2 etc.), The member provided in the container was sometimes corroded. Corrosion occurs in members such as copper (pipes, temperature thermistors, etc.), aluminum (fan vanes, sheet metal members, etc.), and stainless steel.

If a member is corroded, it will be necessary to repair or replace the member. Moreover, although corrosion of a member can be detected after it has occurred, it is difficult to predict in advance whether or not corrosion is likely to occur. For example, it is conceivable to let the worker perform the operation of detecting whether SO2 is contained in the air in the warehouse, and to predict the possibility of corrosion from the detection result. Not realistic. The problem that the member corrodes is a problem that may occur not only in the refrigeration container but also in a refrigeration facility such as a refrigerated warehouse or a refrigerated warehouse.

The present invention has been made in view of such problems, and an object thereof is to make it possible to easily detect corrosion of members provided in a refrigerator facility.

A first aspect of the present disclosure is a refrigeration facility including a refrigeration apparatus (10) that cools the interior of the refrigerator, and the refrigeration apparatus (10) that includes an evaporator (24) through which the air in the refrigerator passes. Drain water treatment section (40) having a drain water receiving section (41) for receiving drain water generated in the vessel (24) and a drain water discharging section (42) for discharging drain water from the drain water receiving section (41) And a corrosive gas detection unit (50) provided in the drain water treatment unit (40) so as to detect corrosive gas in the air in the cabinet from the quality of the drain water. Yes.

In this first aspect, it is possible to detect whether or not the member provided in the warehouse is easily corroded by examining the water quality of the drain water by the corrosive gas detection section (50).

The second aspect of the present disclosure is characterized in that, in the first aspect, the corrosive gas detection unit (50) is provided in the drain water discharge unit (42).

In this second embodiment, the corrosive gas detection part (50) is provided in the drain water discharge part (42). The corrosive gas detection part (50) may be provided in the drain water receiving part (41), but the drain water discharge part (42) can be installed at any location in the refrigeration equipment. The gas detection operation can be easily performed at an arbitrary place.

According to a third aspect of the present disclosure, in the second aspect, the refrigeration apparatus (10) is a container refrigeration apparatus (10) including a casing (12) attached to the container (11), and the drain The water discharge part (42) is a drain hose (42) connected to the drain water receiving part (41), and the drain hose (42) has a drain water discharge side portion connected to the refrigeration apparatus (10 ) Is disposed in the external storage space (S1) formed in the casing (12) so as to store the refrigerant circuit component equipment, and the corrosive gas detection unit (50) is connected to the external storage space (S1). It is provided in the drain hose (42) at a position inside.

In the third aspect, in the container refrigeration apparatus (10), by using the corrosive gas detection unit (50) of the drain hose (42) provided in the external storage space (S1) that is easy to work, Can detect corrosive gas in the cabinet.

According to a fourth aspect of the present disclosure, in the third aspect, a drain water trap (44) is formed in the drain hose (42) at a position inside the external storage space (S1), and the corrosive gas is formed. The detection part (50) is provided in the drain water trap (44) of the drain hose (42).

In this fourth aspect, the drain hose (42) is provided with a drain water trap (44), and the drain water is stored in the drain water trap (44), whereby the corrosive gas based on the water quality of the accumulated drain water. Can be easily detected.

According to a fifth aspect of the present disclosure, in the fourth aspect, the drain water trap (44) protrudes downward in the path of the drain hose (42) and is continuously formed from the upstream side to the downstream side. A first U-turn part (44a) and an upwardly convex second U-turn part (44b), wherein the corrosive gas detection part (50) is provided in the second U-turn part (44b), and The drain water accumulated in the first U-turn part (44a) is located above the liquid level when flowing through the second U-turn part (44b).

In this fifth aspect, drain water accumulates in the first U-turn part (44a) of the drain water trap (44), and the accumulated drain water is above the liquid level when flowing out from the second U-turn part (44b). The provided corrosive gas detector (50) can detect corrosive gas based on the water quality from above the drain water. Moreover, since drain water accumulates in the 1st U-turn part (44a), the edge part inside the warehouse of a drain hose (42) and the edge part by the side of discharge are sealed with drain water. When the refrigeration system is operated to cool the inside of the warehouse, the inside of the warehouse becomes low pressure, and air tends to flow in from the drain water discharge side, whereas the drain water accumulated in the first U-turn part (44a) It functions as a seal, preventing air from flowing into the cabinet.

A sixth aspect of the present disclosure is the portable hydrogen ion index according to any one of the first to fifth aspects, in which the corrosive gas detection unit (50) measures a hydrogen ion index as the quality of drain water. It is a drain water port (43) to which a sensor (45) is attached.

In this sixth aspect, by attaching a portable hydrogen ion index sensor (45) to a drain water port (43) provided in a refrigeration facility such as a refrigeration container or a refrigeration warehouse, corrosive gas in the warehouse is reduced. It can be detected.

A seventh aspect of the present disclosure is the permanent hydrogen ion index according to any one of the first to fifth aspects, wherein the corrosive gas detection unit (50) measures a hydrogen ion index as water quality of the drain water. The refrigeration equipment includes a sensor (47), and further includes a measurement result display unit (48) connected to the hydrogen ion index sensor and displaying a measurement result of the sensor.

In this seventh aspect, a hydrogen ion index sensor (47) for detecting corrosive gas in the refrigerator is permanently installed in a refrigeration facility such as a refrigeration container or a freezer warehouse, and the measurement result of the hydrogen ion index sensor (47) is Displayed on the measurement result display section (48).

According to the first aspect of the present disclosure, by checking the water quality of the drain water with the corrosive gas detector (50), it can be easily confirmed whether or not the member provided in the chamber is easily corroded. If the internal member is in a state of being easily corroded, it is possible to delay the internal corrosion of the internal member by washing the internal chamber. Further, in the first aspect of the present disclosure, since the corrosive gas detection unit (50) is only provided in the drain water treatment unit (40), there is little risk of failure of the refrigeration equipment, and the cost can be minimized.

According to the second aspect of the present disclosure, the corrosive gas detection unit (50) is provided in the drain water discharge unit (42) in which the installation location can be relatively freely selected in the refrigeration facility. It is also possible to perform the operation of detecting gas outside the warehouse, and the workability of the detection operation can be improved.

According to the third aspect of the present disclosure, the drain hose (42) is disposed in the external storage space (S1) of the container refrigeration apparatus (10), and the corrosive gas detection (43) is detected in the drain hose (42). Thus, the detection of the corrosive gas inside the container (11) can be performed in the outside storage space (S1) where the work is easy.

According to the fourth aspect of the present disclosure, the drain hose (42) is provided with the drain water trap (44), and the drain water is stored in the drain water trap (44), so that the quality of the collected drain water is improved. The detection work of the corrosive gas based on this can be easily performed, and the configuration can be prevented from becoming complicated.

According to the fifth aspect of the present disclosure, the drain water accumulated in the first U-turn part (44a) of the drain water trap (44) corrodes above the liquid level when flowing out from the second U-turn part (44b). Since the corrosive gas detector (50) is provided, the corrosive gas detector based on the water quality can be easily and reliably detected from above the liquid surface of the drain water by using the corrosive gas detector (50). Moreover, since it is not necessary to provide a sealing material for preventing water leakage from the drain water port (43), it is possible to prevent the configuration from becoming complicated.

According to the sixth aspect of the present disclosure, by providing a drain water port (43) in a refrigeration facility such as a refrigerated container or a refrigerated warehouse, the corrosive gas in the warehouse using the portable hydrogen ion index sensor (45) is provided. Can be easily detected.

According to the seventh aspect of the present disclosure, the hydrogen ion index sensor (45) is permanently installed in a refrigeration facility such as a refrigeration container or a freezer warehouse, and the measurement result of the hydrogen ion index sensor (45) is displayed as a measurement result display unit (46). If the corrosive gas concentration in the storage is high, an alarm is issued to prompt cleaning of the storage, and if the corrosive gas is detected again after cleaning, the storage You can also check if the inside has been cleaned.

FIG. 1 is a perspective view of a container refrigeration apparatus according to Embodiment 1 of the present invention viewed from the outside of the warehouse. FIG. 2 is a side cross-sectional view illustrating the configuration of the container refrigeration apparatus according to the first embodiment. FIG. 3 is a piping diagram illustrating the configuration of the refrigerant circuit according to the first embodiment. FIG. 4 is a front view of the container refrigeration apparatus with the electrical component box removed. FIG. 5 is a perspective view of the container refrigeration apparatus with the electrical component box, the condenser, and the mixed gas supply apparatus removed. FIG. 6 is a side view showing a portion of the drain hose on the drain water discharge side. FIG. 7 is a rear view of the container refrigeration apparatus. FIG. 8 is a partial cross-sectional view of the container refrigeration apparatus. FIG. 9 is a side view showing a portion on the drain water discharge side in a modification of the embodiment. FIG. 10 is a side view showing a portion on the drain water discharge side in another modification of the embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the present invention is applied to a container (a refrigerated container) as an example of a refrigeration facility. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

As shown in FIGS. 1 and 2, the container refrigeration apparatus (10) performs refrigeration or freezing in a container (11) used for marine transportation or the like. The container refrigeration apparatus (10) includes a refrigerant circuit (20) that cools the air in the container (11) using a refrigeration cycle (see FIG. 3). In the container (11), for example, plants (15) such as grapes are stored in a boxed state.

The container (11) is formed in a box shape that is open on the side, and a casing (12) is attached so as to close one of the open ends. The casing (12) includes a warehouse outer wall (12a) located on the outside of the container (11) and a cabinet inner wall (12b) located on the inside of the container (11). The outer wall (12a) and the inner wall (12b) are made of, for example, an aluminum alloy.

The outer wall (12a) is attached to the peripheral edge of the opening of the container (11) so as to close the opening end of the container (11). The warehouse outer wall (12a) is formed so that the lower part bulges to the inside of the container (11).

The inner wall (12b) is disposed opposite the outer wall (12a). The inner wall (12b) bulges to the inner side corresponding to the lower part of the outer wall (12a). A heat insulating material (12c) is provided in the space between the inner wall (12b) and the outer wall (12a).

The lower part of the casing (12) is formed so as to bulge toward the inner side of the container (11). As a result, an outside storage space (S1) is formed outside the container (11) at the lower part of the casing (12), and an inside storage space (S2) is formed inside the container (11) at the upper part of the casing (12). ) Is formed.

The casing (12) is provided with two open / close doors (16) that can be opened and closed at the time of maintenance. In the external storage space (S1) of the casing (12), an electrical component box (17) is disposed at a position adjacent to an external fan (25) described later.

The partition plate (18) is arranged inside the container (11). This partition plate (18) is comprised by the substantially rectangular-shaped board member, and is standingly arranged so as to oppose the surface inside the container (11) of a casing (12). The partition plate (18) divides the interior of the container (11) from the interior storage space (S2).

A suction port (18a) is formed between the upper end of the partition plate (18) and the ceiling surface in the container (11). The air in the container (11) is taken into the storage space (S2) through the suction port (18a).

In the container (11), a floor board (19) is disposed with a gap between the bottom of the container (11). A boxed plant (15) is placed on the floor board (19). An air flow path (19a) is formed between the bottom surface in the container (11) and the floor board (19). A gap is provided between the lower end of the partition plate (18) and the bottom surface in the container (11), and the gap communicates with the air flow path (19a).

On the front side of the container (11) on the floor board (19) (right side in FIG. 2), the air processed by the container refrigeration apparatus (10) (that is, the air that has cooled the internal air) is stored in the container (11). An outlet (18b) that blows out is formed.

As shown in FIG. 3, the container refrigeration apparatus (10) includes a refrigerant circuit (20) that performs a vapor compression refrigeration cycle by circulating the refrigerant. The refrigerant circuit (20) includes a compressor (21), a condenser (22), an expansion valve (23), and an evaporator (24) that are sequentially connected by a refrigerant pipe (28). .

As shown in FIGS. 1 and 2, the compressor (21) and the condenser (external heat exchanger) (22) are stored in the external storage space (S1). An external fan (25) is disposed above the condenser (22). The outside fan (25) is driven to rotate by the outside fan motor (25a), and draws air outside the container (11) into the outside storage space (S1) and sends it to the condenser (22). It is. In the condenser (22), heat exchange is performed between the refrigerant flowing inside the condenser (22) and the outside air.

The evaporator (24) is stored in the storage space (S2). Two internal fans (26) are arranged above the evaporator (24) in the internal storage space (S2) in the width direction of the casing (12).

The internal fan (26) is rotationally driven by the internal fan motor (26a), draws the internal air of the container (11) from the suction port (18a), and blows it out to the evaporator (24). In the evaporator (24), heat exchange is performed between the refrigerant flowing inside the evaporator (24) and the air in the warehouse. The in-compartment air that has been radiated and cooled to the refrigerant when passing through the evaporator (24) is blown out from the outlet (18b) into the container (11) through the air flow path (19a).

The container refrigeration apparatus (10) includes a mixed gas supply device (30) for supplying a low-oxygen-concentrated mixed gas into the container (11) and adjusting the oxygen concentration in the container. The mixed gas supply device (30) is unitized, and is arranged at the lower left corner of the external storage space (S1) in FIG. Arranged on the right side of the mixed gas supply device (30) is an inverter box (29) containing a drive circuit for driving the compressor (21) at a variable speed.

4 is a front view of the container refrigeration apparatus (10) with the electrical component box (17) removed, and FIG. 5 is an electrical component box (17), a condenser (22), and a mixed gas supply device (30). ) Is a perspective view of the container refrigeration apparatus (10) with the state removed, and FIG. 6 is a side view showing a drain water discharge side portion of the drain hose (42). FIG. 7 is a rear view of the container refrigeration apparatus (10), and FIG. 8 is a partial cross-sectional view of the container refrigeration apparatus (10).

In this embodiment, as shown in FIG. 7, a drain pan (drain water receiving portion) (41) for receiving drain water generated in the evaporator (24) is provided at the bottom of the storage space (S2). Yes. The drain pan (41) has an inclined surface whose height decreases from both ends of the casing (12) toward the center. A drain hose (drain water discharge part) (42) for discharging drain water from the drain pan (41) is connected to the center of the drain pan (41), and the drain hose (42) is pulled out to the outside storage space (S1). It is. A drain water treatment section (40) is constituted by the drain pan (41) and the drain hose (42).

The drain hose (42) is disposed in an external storage space (S1) formed in the casing (12) so that a drain water discharge side portion stores the components of the refrigerant circuit (20). ing. The drain hose (42) is provided with a drain water port (43), and the drain water port (43) is located inside the external storage space (S1). Specifically, the drain hose (42) has a drain water trap (44) formed in the outside storage space (S1), and the drain water port (43) is connected to the drain hose (42). A drain water trap (44) is provided.

As shown in FIG. 9, which is a schematic diagram, the drain water port (43) can be equipped with a portable corrosive gas sensor (45) that detects corrosive gas in the air in the cabinet based on the water quality of the drain water. It is configured as follows. As described above, the drain water port (43) is a port for detecting the corrosive gas in the internal air from the water quality of the drain water, and constitutes the corrosive gas detector (50) of the present invention. As the portable corrosive gas sensor (45), specifically, a portable hydrogen ion index sensor that measures the hydrogen ion index (pH) of drain water can be used.

Specifically, the drain water trap (44) is upwardly connected to the downwardly convex first U-turn portion (44a) formed continuously from the upstream side to the downstream side in the path of the drain hose (42). And a convex second U-turn part (44b). The drain water port (43), which is the corrosive gas detector (50), is provided in the second U-turn portion (44b), and the drain water accumulated in the first U-turn portion (44a) It is located above the liquid level when flowing through the 2U turn part (44b).

In this embodiment, when the refrigeration apparatus (11) is operated, water droplets condensed on the evaporator are dripped onto the drain pan (41) as indicated by arrows in FIG. 7, and the drain water flows toward the center of the drain pan (41). . The drain water further flows through the drain hose (42) and is discharged out of the machine through the drain water trap (44).

When detecting the corrosive gas in the chamber, attach a hydrogen ion index sensor (43) to the drain water port (43) and check the drain water quality (hydrogen ion index). If the hydrogen ion index detected by the hydrogen ion index sensor (45) is small, the acidity is strong, and it can be determined that the acidic gas contained in the air in the cabinet is dissolved in the drain water. It can be detected that the attached member is easily corroded. If the inside of the cabinet is easily corroded, the inside of the cabinet may be washed. Moreover, since the acidity of drain water is weak if a hydrogen ion index | exponent is large, it can be judged that the member provided in the store | warehouse | chamber is not in the state which is easy to corrode.

-Effects of the embodiment-
According to this embodiment, the drain hose (42) is provided with a drain water port (43) as a corrosive gas detector (50), and a hydrogen ion index sensor (45) is attached to the drain water port (43). The hydrogen ion index (pH) of the drain number is measured. This makes it possible to determine whether or not the drain water is strongly acidic, so that it can be easily confirmed whether or not the member provided in the warehouse is in a state of being easily corroded. And if the member in a store | warehouse | chamber is in the state which is easy to corrode, it is good to wash the store interior.

In the present embodiment, a drain water trap (44) is formed in the drain hose (42), and a drain water port (43) is provided in the drain water trap (44). Therefore, as shown in FIG. The hydrogen ion index sensor (45) can be securely inserted into the water. Therefore, the detection accuracy can be increased.

In the present embodiment, the corrosive gas detection unit is located above the liquid level when drain water accumulated in the first U-turn part (44a) of the drain water trap (44) flows out of the second U-turn part (44b). Since the drain water port (43) which is (50) is provided, the drain water port (43 above the liquid level with respect to the drain water accumulated in the first U-turn portion (44a) of the drain water trap (44). Therefore, the corrosive gas detection work based on water quality can be easily and reliably performed. Moreover, since it is not necessary to provide a sealing material for preventing water leakage from the drain water port (43), it is possible to prevent the configuration from becoming complicated.

Further, in this embodiment, since drain water accumulates in the first U-turn portion (44a), the end portion on the inner side of the drain hose (42) and the end portion on the discharge side are sealed with drain water. Generally, when the refrigerator is operated to cool the inside of the warehouse, the inside of the warehouse becomes low pressure, and air tends to flow in from the drain water discharge side, whereas in the above configuration, the first U-turn part (44a) is accumulated. The drain water functions as a seal, preventing the inflow of air into the cabinet.

<< Other Embodiments >>
About the said embodiment, it is good also as the following structures.

For example, in the above embodiment, the example in which the present invention is applied to the container (11) provided with the container refrigeration apparatus (10) for cooling the inside of the warehouse has been described, but the present invention is not limited to the container (11), As long as the refrigeration apparatus includes a refrigeration apparatus that cools the inside of the refrigerator and the evaporator through which the air in the storage passes, the refrigeration apparatus can be applied to a refrigeration warehouse or a refrigerator warehouse.

Moreover, in the said embodiment, although the water quality of drain water was investigated using the portable hydrogen ion index sensor (45), the corrosive gas in a warehouse was detected from the water quality, as shown in FIG. The drain hose (42) may be provided with a permanent hydrogen ion index sensor (47) as a corrosive gas detector (50). In this case, the container refrigeration apparatus (10) is provided with a measurement result display unit (48) connected to the hydrogen ion index sensor (47) and displaying the measurement result of the hydrogen ion index sensor (47). (See FIG. 1). FIG. 1 shows an example in which the measurement result display unit (48) is provided in the electrical component box (17). If the measurement result display (46) is provided, an alarm can be issued to prompt cleaning of the interior, and if corrosive gas is detected again after cleaning, it is confirmed whether the interior has been cleaned. You can also.

Moreover, in the said embodiment, although the corrosive gas detection part (50) is provided in the drain hose (42), the corrosive gas detection part (50) is a drain water treatment part (40). If it is a position where it stays, it may be provided in the drain pan (41), and even when it is provided in the drain hose (42), the position may be changed from the above embodiment.

As described above, the present invention is useful for a technique for suppressing corrosion of members provided in a refrigerator in a refrigeration facility provided with a refrigeration apparatus for cooling the refrigerator.

10 Container refrigeration equipment (refrigeration equipment)
11 Container (refrigeration equipment)
12 Casing 24 Evaporator 40 Drain water treatment part 41 Drain pan (drain water receiving part)
42 Drain hose (drain water discharge part)
43 Drain water port (corrosive gas detector)
44 Drain water trap 45 Hydrogen ion index sensor 47 Hydrogen ion index sensor 48 Measurement result display section 50 Corrosive gas detection section S1 External storage space

Claims

A refrigeration facility comprising a refrigeration apparatus (10) for cooling the interior of the refrigerator, the refrigeration apparatus (10) having an evaporator (24) through which the interior air passes,
A drain water treatment part (41) having a drain water receiving part (41) for receiving drain water generated in the evaporator (24) and a drain water discharging part (42) for discharging drain water from the drain water receiving part (41) 40) and a corrosive gas detection part (50) provided in the drain water treatment part (40) so as to detect corrosive gas in the air in the cabinet from the quality of the drain water. Features refrigeration equipment.
In claim 1,
The refrigeration equipment, wherein the corrosive gas detection part (50) is provided in the drain water discharge part (42).
In claim 2,
The refrigeration apparatus (10) is a container refrigeration apparatus (10) provided with a casing (12) attached to the container (11),
The drain water discharge part (42) is a drain hose (42) connected to the drain water receiving part (41),
The drain hose (42) is disposed in an external storage space (S1) formed in the casing (12) so that a drain water discharge side portion stores the refrigerant circuit constituting device of the refrigeration apparatus (10). Arranged,
The refrigeration equipment, wherein the corrosive gas detector (50) is provided in the drain hose (42) at a position inside the external storage space (S1).
In claim 3,
A drain water trap (44) is formed in the drain hose (42) at a position inside the external storage space (S1),
The refrigeration equipment, wherein the corrosive gas detection section (50) is provided in a drain water trap (44) of the drain hose (42).
In claim 4,
The drain water trap (44) includes a downwardly convex first U-turn portion (44a) formed continuously from the upstream side to the downstream side in the path of the drain hose (42) and an upwardly convex second U. With a turn part (44b),
The corrosive gas detection part (50) is provided in the second U-turn part (44b), and drain water accumulated in the first U-turn part (44a) flows through the second U-turn part (44b). A refrigeration apparatus located above the liquid level at the time.
In any one of Claims 1 to 5,
The refrigeration equipment, wherein the corrosive gas detection unit (50) is a drain water port (43) to which a portable hydrogen ion index sensor (45) for measuring a hydrogen ion index as a drain water quality is mounted.
In any one of Claims 1 to 5,
The corrosive gas detector (50) includes a permanent hydrogen ion index sensor (47) that measures a hydrogen ion index as the quality of the drain water,
The refrigeration equipment further comprising a measurement result display unit (46) connected to the hydrogen ion index sensor and displaying a measurement result of the permanent hydrogen ion index sensor (47).