Evaporative cooling oil circulation system for refrigeration equipment

Abstract

The present invention discloses an evaporative cooling oil circuit circulation system of a refrigeration device, the refrigeration device comprises a frame, a lower chamber and an evaporation chamber are arranged in the frame, an evaporation heat dissipation mechanism is arranged on the evaporation chamber, a water collection and recovery mechanism is arranged in the lower chamber, and the water collection and recovery mechanism comprises a water receiving pan; the evaporative cooling oil circuit circulation system comprises a refrigerant tube, a refrigerant tube coil is arranged in the water receiving pan, and the coil height of the refrigerant tube is lower than the depth of the water receiving pan. The present application directly arranges the refrigerant tube coil in the water receiving pan, the structure is simple, and no sealed environment is required. The cooling water cooled by the evaporative heat dissipation mechanism can exchange heat with the refrigerant in the refrigerant tube when it falls into the water receiving pan, so as to realize rapid cooling of the refrigerant tube; at the same time, because the water receiving pan is in an open state, the refrigerant tube can also exchange heat with the outside air, so as to enhance the heat dissipation effect of the refrigerant tube.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to an evaporative cooling oil circuit circulation system of refrigeration equipment. Background Art

[0002] In the prior art, refrigeration equipment often uses a water circulation system and a heat exchanger to fully cool the refrigerant. For example, the Chinese utility model patent with patent number CN201720573344.0 discloses an evaporative condensation temperature regulating device, which includes a frame, a lower chamber and an evaporation chamber located above the lower chamber are provided on the frame, the evaporation chamber is provided with an evaporation heat dissipation mechanism and a water distribution mechanism for supplying water to the evaporation heat dissipation mechanism, the lower chamber is provided with a water collection and recovery mechanism for recovering the cooling water flowing through the evaporation heat dissipation mechanism, the water distribution mechanism, the evaporation heat dissipation mechanism and the water collection and recovery mechanism are connected in series to form a water circulation loop (i.e., a water path), and the water collection and recovery mechanism includes a water receiving pan for separating the lower chamber from the evaporation chamber; the lower chamber is also provided with a refrigerant circuit (i.e., an oil circuit) and a heat exchanger, the water circulation circuit is connected to the heat exchanger and heat is exchanged with the refrigerant circuit through the heat exchanger.

[0003] The heat exchanger used in the evaporative condensing temperature regulating device is quite conventional, and includes a hollow shell tube, the shell tube is arranged in a spiral shape, and at least one refrigerant tube arranged along the axis of the shell tube is arranged in the shell tube, the shell is connected in series to the circulation loop, and the refrigerant tube is connected in series to the refrigerant loop. When the cooling water in the water circulation loop fills the shell tube, the refrigerant tube passing through the shell tube is surrounded by the cooling water, thereby realizing heat exchange between the cooling water and the refrigerant.

[0004] The disadvantages of this heat exchanger are: (1) the shell tube not only has a closed hollow cavity, but also the shell tube and the refrigerant tube are arranged in a spiral shape, which leads to a high cost of the shell tube and the refrigerant tube; (2) in the hollow and closed shell tube, only cooling water can be used for heat dissipation, and the heat dissipation effect is poor. Summary of the invention

[0005] The invention of the present application aims to provide an evaporative cooling oil circuit circulation system for a refrigeration device with good heat dissipation effect and relatively low cost.

[0006] In order to achieve the above-mentioned invention object, the technical solution of this application is as follows:

[0007] An evaporative cooling oil circuit circulation system of a refrigeration equipment, the refrigeration equipment comprising a frame, a lower chamber and an evaporation chamber located above the lower chamber, an evaporative heat dissipation mechanism provided on the evaporation chamber, a water collection and recovery mechanism provided in the lower chamber, the water collection and recovery mechanism comprising a water receiving pan for separating the lower chamber from the evaporation chamber; the evaporative cooling oil circuit circulation system comprising a refrigerant pipe, the refrigerant pipe coil is arranged in the water receiving pan, and the coil height of the refrigerant pipe is lower than the depth of the water receiving pan.

[0008] The present application directly arranges the refrigerant tube coil in the water receiving tray without the need for a sealed environment, which not only has a simple structure, but also the cooling water cooled by the evaporative heat dissipation mechanism can exchange heat with the refrigerant in the refrigerant tube when it falls into the water receiving tray, thereby achieving rapid cooling of the refrigerant tube. At the same time, since the water receiving tray is in an open state, when the cooling water does not enter the water receiving tray, the refrigerant in the refrigerant tube can exchange heat with the outside air. When the cooling water exchanges heat with the refrigerant in the refrigerant tube, the temperature of the refrigerant will evaporate part of the cooling water, thereby further improving the heat exchange efficiency and enhancing the heat dissipation effect of the refrigerant tube.

[0009] In the evaporative cooling oil circuit circulation system of the above-mentioned refrigeration equipment, the outer periphery of the water receiving pan is provided with a water retaining edge, an overflow pipe protruding from the top surface of the water receiving pan is provided in the center of the water receiving pan, the top edge of the water retaining edge is higher than the overflow port of the overflow pipe, and a water receiving groove for accommodating the refrigerant pipe is formed between the overflow pipe and the water retaining edge. When the water receiving groove is filled with cooling water, the cooling water will flow out from the overflow port of the overflow pipe to the water collecting groove of the water collecting and recycling mechanism under the water receiving pan.

[0010] In the evaporative cooling oil circuit circulation system of the above-mentioned refrigeration equipment, a plurality of strip-shaped overflow grooves are formed on the outer peripheral wall of the overflow pipe, and all overflow grooves extend along the axial direction of the overflow pipe to the end opening of the overflow pipe, and the lengths of two adjacent overflow grooves are different. After heat exchange with the refrigerant pipe, the cooling water in the water receiving pan heats up again. If only the top layer of cooling water flows out through the overflow port, the high-temperature cooling water in the lower layer of the water receiving pan will be retained in the water receiving pan, resulting in poor heat dissipation effect of the refrigerant pipe. Overflow grooves of different lengths enable cooling water at various depths of the water receiving tank to flow out through the overflow pipe, realizing rapid replacement of cooling water, thereby improving heat exchange efficiency.

[0011] In the evaporative cooling oil circuit circulation system of the above refrigeration equipment, the overflow grooves are arranged in pairs, and the two overflow grooves belonging to the same pair are symmetrically arranged on the overflow pipe, so as to further improve the rapid replacement of cooling water in the water receiving tank.

[0012] In the evaporative cooling oil circuit circulation system of the above refrigeration equipment, the refrigerant pipe is gradually coiled from the water retaining edge of the water receiving tank to the overflow pipe side. The water retaining edge of the water receiving tank has a larger circumference, and the refrigerant pipe is gradually coiled from the water retaining edge to the overflow pipe side so that the refrigerant pipe at the high temperature end has a larger heat dissipation area, thereby improving the heat dissipation efficiency.

[0013] In the evaporative cooling oil circuit circulation system of the above-mentioned refrigeration equipment, a refrigerant pipe inlet and a refrigerant pipe outlet are provided on the water receiving pan, and the refrigerant pipe inlet and the refrigerant pipe outlet are both located on the periphery of the overflow pipe;

[0014] The refrigerant pipe comprises in sequence an access section fixedly and sealedly installed at the refrigerant pipe access port, a coil section coiled in a water receiving tank, and an outlet section fixedly and sealedly installed at the refrigerant outlet. The access section, coil section and outlet section are integrally arranged.

[0015] In the evaporative cooling oil circuit circulation system of the above-mentioned refrigeration equipment, the access section and the outlet section are both arranged in an inverted U shape, and the U-shaped bottoms of the inverted U-shaped access section and the inverted U-shaped outlet section are both above the liquid level of the water receiving pan. The inverted U-shaped arrangement above the liquid level of the water receiving pan allows the access section (high temperature section) to dissipate heat first under the action of the fan of the evaporative heat dissipation mechanism; while the inverted U-shaped arrangement above the liquid level of the water receiving pan allows the outlet section to be away from the cooling water heated by heat exchange, and to be connected to the refrigerant circuit after dissipating heat again under the action of the fan of the evaporative heat dissipation mechanism; thereby further improving the heat dissipation effect of the refrigerant.

[0016] In the evaporative cooling oil circuit circulation system of the refrigeration equipment, the outer periphery of the refrigerant tube is provided with a heat sink, and the heat sink spirally surrounds the refrigerant tube. The heat sink can further improve the heat dissipation effect of the refrigerant tube.

[0017] In the evaporative cooling oil circuit circulation system of the above-mentioned refrigeration equipment, the heat sink is arranged on the outer periphery of the coil section and is integrally formed with the coil section.

[0018] The evaporative cooling oil circuit circulation system of the above-mentioned refrigeration equipment also includes an indoor heat exchanger connected to the access section, an oil separator connected to the outlet section, a compressor connected to the oil separator, and a gas-liquid separator connected to the compressor; the gas-liquid separator is connected to the indoor heat exchanger, the liquid inlet of the compressor is connected to the liquid outlet of the oil separator, the oil inlet of the compressor is connected to the oil outlet of the oil separator, and the gas-liquid separator is connected to the liquid outlet of the compressor; a one-way valve is provided between the indoor heat exchanger and the access section.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present application directly arranges the refrigerant tube coil in the water receiving tray without the need for a sealed environment, which not only has a simple structure, but also the cooling water cooled by the evaporative heat dissipation mechanism can exchange heat with the refrigerant in the refrigerant tube when it falls into the water receiving tray, thereby achieving rapid cooling of the refrigerant tube. At the same time, since the water receiving tray is in an open state, when the cooling water does not enter the water receiving tray, the refrigerant in the refrigerant tube can exchange heat with the outside air. When the cooling water exchanges heat with the refrigerant in the refrigerant tube, the temperature of the refrigerant will evaporate part of the cooling water, thereby further improving the heat exchange efficiency and enhancing the heat dissipation effect of the refrigerant tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an evaporative cooling oil circuit circulation system of a refrigeration device of the present invention;

[0022] Figure 2 for Figure 1 Structural diagram of the middle water distribution plate;

[0023] Figure 3 for Figure 1 Schematic diagram of the structure of the middle water distribution plate from another perspective;

[0024] Figure 4 for Figure 1 Schematic diagram of the structure of the middle evaporation plate;

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the middle water tray;

[0026] Figure 6 It is a schematic diagram of the arrangement of the refrigerant pipe in the water receiving pan;

[0027] Figure 7 is a schematic diagram of the structure of the refrigerant pipe from another perspective;

[0028] Figure 8 This is an enlarged view of the surface structure of the refrigerant tube. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Example 1

[0031] like Figure 1As shown, this embodiment is an evaporative cooling oil circuit circulation system of a refrigeration device, and the refrigeration device includes a frame 1, and an evaporative cooling water circuit circulation system and an evaporative cooling oil circuit circulation system of this embodiment are arranged in the frame 1. A lower chamber 11 and an evaporation chamber 12 located above the lower chamber 11 are formed in the frame 1, wherein the evaporative cooling water circuit circulation system includes a water collection and recovery mechanism 2, a water distribution mechanism 3 and an evaporative cooling mechanism 4 connected in series, wherein the water collection and recovery mechanism 2 is arranged in the lower chamber 11, and the water distribution mechanism 3 and the evaporative cooling mechanism 4 are arranged in the evaporative cooling mechanism 12, and the water distribution mechanism 3 is used to transport the cooling water heated by heat to the evaporative cooling mechanism 4, and the evaporative cooling mechanism 4 evaporates and cools the cooling water heated by heat, and the water collection and recovery mechanism 2 is used to recover the cooling water flowing through the evaporative cooling mechanism 4.

[0032] like Figure 1 Shown, combined Figure 4 It can be seen that the evaporation heat dissipation mechanism 4 of this embodiment includes a plurality of (four in this embodiment) evaporation plates 41 detachably connected to the side of the frame 1, and all evaporation plates 41 surround the above-mentioned evaporation chamber 12. Each evaporation plate 41 includes an evaporation plate frame 411, in which a wet curtain paper stack 412 filling the evaporation plate frame 411 is arranged, and an outer cover 413 is arranged on the outer side of the evaporation plate frame 411, and a filter partition 414 is arranged between the outer cover 413 and the evaporation plate frame 411, and the evaporation plate frame 411 has a water inlet groove 415 at the top and a water outlet groove 416 at the bottom; wherein the water inlet groove 415 is connected to the water distribution mechanism 3, and the water outlet groove 416 is connected to the water collection and recovery mechanism 2.

[0033] The evaporative heat dissipation mechanism 4 also includes a negative pressure fan 42 arranged on the top of the frame 1. The negative pressure fan 42 is used to extract the steam generated by the gasification of the high-temperature cooling water dispersed in the evaporation plate 41, thereby reducing the temperature of the high-temperature cooling water.

[0034] like Figure 1 As shown, the water collection and recovery mechanism 2 of this embodiment includes a water collecting box 21 in the lower chamber 11 and a water receiving tray 22 above the water collecting box 21. The water receiving tray 22 is just below the water outlet trough 416. The cooling water flowing out of the water outlet trough 416 is collected in the water receiving tray 22. The evaporation chamber 12 and the lower chamber 11 are located on the upper and lower sides of the water receiving tray 22 respectively.

[0035] like Figure 5 As shown, the water receiving pan 22 of this embodiment includes a pan body 221, the outer periphery of the pan body 221 is provided with a water retaining edge 222, an overflow pipe 23 protruding from the top surface of the water receiving pan 22 is provided in the center of the pan body 221, the top edge of the water retaining edge 222 is higher than the overflow port 231 of the overflow pipe 23, and a water receiving trough 223 is formed between the overflow pipe 23 and the water retaining edge 222.

[0036] like Figure 1 Shown, combined Figure 2 and Figure 3 It can be seen that the water distribution mechanism 3 of this embodiment includes a water supply pipe 32 connected to the water collecting tank 21 through a circulating water pump 31. The water supply pipe 32 extends upward from the lower chamber 11 (through the water receiving tray 22, or from the outer periphery of the water receiving tray 22) to the evaporation chamber 12, and is respectively connected to four water distribution pipes (not shown in the figure) through a five-way connector (not shown in the figure), each water distribution pipe is connected to a water distribution plate 33, and each water distribution plate 33 is respectively installed above the water inlet groove 415 of the corresponding evaporation plate 41.

[0037] like Figure 2 and Figure 3 As shown, the top surface of the water dividing plate 33 of the present embodiment is an obtuse isosceles triangle, at the vertex of the isosceles triangle, a flooding platform 34 is convexly provided on the top surface of the water dividing plate 33, and a groove 331 is formed on the back of the water dividing plate 33 below the flooding platform 34, and a water outlet pipe 35 is formed in the groove 331, which extends in the opposite direction to the top surface of the flooding platform 34, and the water outlet hole 351 protrudes from the top surface of the flooding platform 34; during installation, the water dividing pipe is sleeved on the outside of the water outlet pipe 35 and embedded in the groove 331, so that the cooling water in the water dividing pipe can flow to the top surface of the water dividing plate 33 through the water outlet pipe 35.

[0038] like Figure 2 As shown, on one side of the flooding platform 34, a flooding groove 352 is formed on the side wall of the water outlet pipe 35; on the side facing the flooding groove 352, a drainage edge 332 located at the base of an isosceles triangle is formed on the top surface of the water dividing plate 33. In order to connect with the water inlet groove 415, the projection of the drainage edge 332 on the water inlet groove 415 should also be a straight line consistent with the water inlet groove 415. This results in the drainage edge 332 and the water outlet hole 351 forming a triangular area, and the distances between the water outlet hole 351 and various parts of the drainage edge 332 are different, which makes it difficult to evenly distribute the cooling water to various parts of the drainage edge 332. Therefore, in this embodiment, the top surface of the water dividing plate 33 is set to be arched (such as Figure 2As shown in FIG. 4 , the arched top surface is symmetrically arranged about the line connecting the midpoint of the drainage edge 332 and the center of the water outlet hole 351; and the drainage edge 332 is provided with a guide plate 36 integrally arranged with the water diversion plate 33 (the side wall of the guide plate 36 connected to the water diversion plate 33 is also arched), and the guide plate 36 extends toward the back of the water diversion plate 33 and connects with the water inlet groove 415. Between the flooding platform 34 and the drainage edge 332, the top surface of the water diversion plate 33 is provided with a plurality of diversion spokes 333 distributed in a fan-shaped manner around the flooding platform 34, and each diversion spoke 333 extends from the outer periphery of the flooding platform 34 to the drainage edge 332 and then continues to extend to the edge of the guide plate 36, and a diversion channel 334 is formed between adjacent diversion spokes 333. Due to the limited area of ​​the flooding platform 34, the spacing between the diverter spokes 333 on the side of the drainage edge 332 is uncertain; therefore, in this embodiment, a plurality of diverter spokes 361 are also arranged on the guide plate 36, each of which extends from the edge of the guide plate 36 to the drainage edge 332, and the diverter spokes 361 are located between the diverter spokes 333, dividing each diverter channel 334 into diverter channels 362 of equal width. When distributing water, the cooling water flows from the flooding trough 352 to the flooding platform 34, the flooding platform 34 first disperses the cooling water in the first stage, the diverter spokes 333 disperse the cooling water in the second stage, and the diverter spokes 361 disperse the cooling water in the third stage, ensuring that the cooling water flows evenly into the water inlet trough 415 along all parts of the guide plate 36.

[0039] On the side facing away from the overflow trough 352, the water diversion plate 33 is provided with a water stop plate 37 protruding from the top surface of the water diversion plate 33. The water stop plate 37 is also integrally arranged with the water diversion plate 33. The water stop plate 37 extends from the vertex of the isosceles triangle along the waist of the isosceles triangle to the two ends of the guide plate 36 and protrudes in front of the guide plate 36, thereby enclosing the cooling water and ensuring that the cooling water flows from the surface of the guide plate 36 along the drainage edge 332 into the water inlet trough 415.

[0040] like Figure 1 and Figure 6 As shown, the evaporative cooling oil circuit circulation system includes a refrigerant pipe 5, which is coiled in the water receiving groove 223 of the water receiving pan 22. A refrigerant pipe inlet and a refrigerant pipe outlet are provided in the water receiving groove 223, and the refrigerant pipe inlet and the refrigerant pipe outlet are both located at the outer periphery of the overflow pipe 23; the refrigerant pipe 5 sequentially includes an access section 51 fixedly and sealedly installed at the refrigerant pipe inlet, a coil section 52 coiled in the water receiving groove 223, and an outlet section 53 fixedly and sealedly installed at the refrigerant pipe outlet, and the access section 51, the coil section 52 and the outlet section 53 are integrally arranged.

[0041] like Figure 6 and Figure 7As shown, in this embodiment, the coil section 52 of the refrigerant tube 5 is gradually coiled from the water retaining edge 222 of the water receiving tank 223 to the overflow pipe 23 side, and the access section 51 is connected from the overflow pipe 23 side of the water receiving tank 223. Therefore, the access section 51 is set to be an inverted U-shape, and the U-shaped bottom of the inverted U-shaped access section 51 is above the liquid level of the water receiving pan 22. Among the two arms of the U-shape, one arm is connected from the refrigerant tube access port, and the other arm is connected to the coil section 52. The outlet section 53 is also an inverted U-shape. The inverted U-shape is set above the liquid level of the water receiving pan 22 so that the high temperature section of the access section 51 can first dissipate heat under the action of the fan of the evaporative heat dissipation mechanism 4; and the inverted U-shape is set above the liquid level of the water receiving pan 22 so that the outlet section 53 is far away from the cooling water heated by heat exchange, and is connected to the evaporative cooling oil circuit circulation system after dissipating heat again under the action of the fan of the evaporative heat dissipation mechanism 4; thereby further improving the heat dissipation effect of the refrigerant.

[0042] The refrigerant pipe 5 exchanges heat with the cooling water in the water receiving pan 22. After the refrigerant cools down, the cooling water in the water receiving pan 22 heats up again. If the heated cooling water can only flow out from the overflow port 231 at the end of the overflow pipe 23, a large amount of high-temperature cooling water will linger at the bottom of the water receiving pan 22 and cannot be discharged in time. Figure 1 , Figure 5 and Figure 7 As shown, in this embodiment, a plurality of strip-shaped overflow grooves 232 are provided on the outer peripheral wall of the overflow pipe 23, and all the overflow grooves 232 extend axially along the overflow pipe 23 to the overflow port 231, and the lengths of two adjacent overflow grooves 232 are different. The overflow grooves 232 of different lengths enable the cooling water at various depths of the water receiving tank 223 to flow out through the overflow pipe 23, thereby realizing rapid replacement of the cooling water and improving the heat exchange efficiency.

[0043] In order to further improve the heat dissipation efficiency of the refrigerant pipe 5, as Figure 8 As shown, the outer periphery of the refrigerant tube 5 is provided with a heat sink 54, and the heat sink 54 can be as follows Figure 8 The heat sink 54 shown as being arranged spirally around the outer circumference of the refrigerant tube 5 may also be dispersed into many small heat sinks evenly distributed around the outer circumference of the refrigerant tube 5. The heat sink 54 may be arranged only on the coil section 52, or on the inlet section 51 and the outlet section 53.

[0044] like Figure 1As shown, the evaporative cooling oil circuit circulation system also includes an indoor heat exchanger (not shown in the figure) connected to the access section 51 of the refrigerant pipe 5, an oil separator 6 connected to the outlet section 53 of the refrigerant pipe 5, a compressor 7 connected to the oil separator 6, and a gas-liquid separator 8 connected to the compressor 7; the gas-liquid separator 8 is connected to the indoor heat exchanger, the liquid inlet of the compressor 7 is connected to the liquid outlet of the oil separator 6, the oil inlet of the compressor 7 is connected to the oil outlet of the oil separator 6, and the gas-liquid separator 8 is connected to the liquid outlet of the compressor 7; a one-way valve (not shown in the figure) is provided between the indoor heat exchanger and the access section 51.

[0045] The working principle of the evaporative cooling oil circuit circulation system of a refrigeration equipment in this embodiment is as follows:

[0046] The refrigerant circulates in the refrigerant circuit. At the indoor heat exchanger, the refrigerant changes from liquid to gas, absorbs heat, and lowers the indoor temperature. The high-temperature refrigerant after absorbing heat enters the water receiving pan 22 through the refrigerant pipe access section 51, which is located above the water receiving pan 22. It is first cooled by air under the action of the negative pressure fan 42. Then it enters the coil section 52 to exchange heat with the cooling water in the water receiving pan 22. The cooled refrigerant enters the outlet section 53, which is also located above the water receiving pan to keep away from the cooling water heated by the heat exchange. Under the action of the negative pressure fan 42, the temperature is lowered again (the cooling water on the surface of the outlet section 53 evaporates and takes away the heat under the action of the negative pressure fan 42); under the action of the compressor, the low-temperature refrigerant first enters the oil separator 6 for oil-liquid separation, and the separated lubricating oil enters the oil inlet of the compressor 7 through the oil outlet, and the separated refrigerant enters the liquid inlet of the compressor 7 through the liquid outlet of the oil separator 6. Under the action of the compressor 7, the refrigerant enters the gas-liquid separator 8 for gas-liquid separation, and the separated liquid refrigerant re-enters the indoor heat exchanger to cool the indoor space.

Claims

1. An evaporative cooling oil circuit circulation system of a refrigeration device, the refrigeration device comprising a frame (1), the frame (1) being provided with a lower chamber (11) and an evaporation chamber (12) located above the lower chamber (11), the evaporation chamber (12) being provided with an evaporative heat dissipation mechanism (4), the lower chamber (11) being provided with a water collection and recovery mechanism (2), the water collection and recovery mechanism (2) comprising a water receiving tray (22) for separating the lower chamber (11) and the evaporation chamber (12); characterized in that: The evaporative cooling oil circuit circulation system comprises a refrigerant pipe (5), wherein the refrigerant pipe (5) is coiled in the water receiving pan (22), and the coiling height of the refrigerant pipe (5) is lower than the depth of the water receiving pan (22); The water receiving pan (22) is provided with a refrigerant pipe inlet and a refrigerant pipe outlet, and the refrigerant pipe inlet and the refrigerant pipe outlet are both located on the outer periphery of the overflow pipe (23); The refrigerant pipe (5) comprises, in sequence, an inlet section (51) fixedly and sealingly installed at the refrigerant pipe inlet, a coil section (52) coiled in the water receiving tank (223), and an outlet section (53) fixedly and sealingly installed at the refrigerant outlet, wherein the inlet section (51), the coil section (52) and the outlet section (53) are integrally arranged; The inlet section (51) and outlet section (53) are both arranged in an inverted U shape, and the U-shaped bottoms of the inverted U-shaped inlet section (51) and the inverted U-shaped outlet section (53) are both above the liquid level of the water receiving tray (22); The refrigerant tube (5) is provided with a heat sink (54) on its outer periphery, and the heat sink (54) surrounds the refrigerant tube (5) in a spiral shape.

2. The evaporative cooling oil circuit circulation system of the refrigeration equipment according to claim 1, characterized in that: The outer periphery of the water receiving pan (22) is provided with a water retaining edge (222); an overflow pipe (23) protruding from the top surface of the water receiving pan (22) is provided in the center of the water receiving pan (22); the top edge of the water retaining edge (222) is higher than the overflow port (231) of the overflow pipe (23); and a water receiving groove (223) for accommodating the refrigerant pipe (5) is formed between the overflow pipe (23) and the water retaining edge (222).

3. The evaporative cooling oil circuit circulation system of the refrigeration equipment according to claim 2, characterized in that: A plurality of strip-shaped overflow grooves (232) are formed on the outer peripheral wall of the overflow pipe (23), and all the overflow grooves (232) extend axially along the overflow pipe (23) to the end opening of the overflow pipe (23), and the lengths of two adjacent overflow grooves (232) are different.

4. The evaporative cooling oil circuit circulation system of the refrigeration equipment according to claim 3, characterized in that: The overflow grooves (232) are arranged in pairs, and the two overflow grooves (232) belonging to the same pair are symmetrically arranged on the overflow pipe (23).

5. The evaporative cooling oil circuit circulation system of the refrigeration equipment according to claim 2, characterized in that: The refrigerant pipe (5) is gradually coiled from the water retaining edge (222) of the water receiving trough (223) to the overflow pipe (23).

6. The evaporative cooling oil circuit circulation system of the refrigeration equipment according to claim 1, characterized in that: The heat sink (54) is arranged on the outer periphery of the coil section (52) and is integrally formed with the coil section (52).

7. The evaporative cooling oil circuit circulation system of the refrigeration equipment according to claim 1, characterized in that: The invention also comprises an indoor heat exchanger connected to the refrigerant pipe (5) access section (51), an oil separator (6) connected to the refrigerant pipe (5) outlet section (53), a compressor (7) connected to the oil separator (6), and a gas-liquid separator (8) connected to the compressor (7); the gas-liquid separator (8) is connected to the indoor heat exchanger, the liquid inlet of the compressor (7) is connected to the liquid outlet of the oil separator (6), the oil inlet of the compressor (7) is connected to the oil outlet of the oil separator (6), and the gas-liquid separator (8) is connected to the liquid outlet of the compressor (7); a one-way valve is provided between the indoor heat exchanger and the refrigerant pipe (5) access section (51).

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