CO2 air cooler for CO2 hot gas defrosting in direct expansion liquid supply mode

Abstract

The utility model relates to the technical field of freezing and refrigerating equipment, and particularly discloses a CO2 air cooler for defrosting CO2 hot gas in a direct expansion liquid supply mode. The CO2 air cooler comprises a coil pipe which is arranged on a bottom plate of a plenum chamber and is erected and arranged through a reinforcing rib, and is characterized in that an inlet of the coil pipe is connected with a liquid distribution head, the liquid distribution head is communicated with a liquid supply connecting pipe and a hot air defrosting coil pipe in parallel through a lateral connector, and a hot air inlet pipe is arranged on the hot air defrosting coil pipe; an outlet of the coil pipe is connected with the air return port through an air return collecting pipe; the air cooler shell is provided with a high-stretching air duct located between the adjacent reinforcing ribs, the high-stretching air duct is provided with a strip-shaped air ring electric heater, and the center of the high-stretching air duct is provided with an EBM outer rotor axial flow motor. The CO2 direct expansion liquid supply device is reasonable in structural design and flexible in application, a CO2 direct expansion liquid supply mode is adopted, large pressure drop can be borne, the pipe diameter is small, and the CO2 filling amount is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration and cold storage equipment technical field, especially direct expansion CO2 cold air supply liquid mode's CO2 hot air defrosting CO2 air cooler. BACKGROUND

[0002] At present, with the development of cold chain 14th five-year plan, people pay more and more attention to the GWP value and ODP value of refrigerant, and the smaller the ODP value and GWP value, the smaller the influence of refrigerant on the environment;We actively respond to the national policy, strive to reach carbon peak in 2030, realize carbon neutralization in 2060, and the design, use and automatic control of natural and environmental protection working medium carbon dioxide have been widely applied.

[0003] The existing CO2 system in China adopts the way of bucket pump liquid supply, and the filling amount is more;The cold air cooler commonly used in quick freezing room is more, and the top exhaust pipe used in low-temperature warehouse is more, most of the CO2 cold air coolers adopt water defrosting defrosting mode, and the defrosting and dripping water time is long, which is easy to cause the situation of dripping water, mist, food mildew and the like in the cold storage;And the existing freon cold air cooler in China adopts hot air defrosting, and the water pan defrosting generally still adopts electric defrosting, and so far there has not been CO2 cold air cooler hot air defrosting and water pan hot air defrosting.

[0004] In the existing CO2 cold air cooler, the connection between the axial flow air duct and the cold air cooler shell is a right angle, the air resistance is large, and air vortex is caused;The static pressure boxes of all air ducts are communicated, the interference between them is large, the short flow between the coil and the water pan is easy, and the heat exchange efficiency is low;The cold air cooler wooden package is used to protect the water pan, generally the water pan faces upward, and the transportation and hoisting of the cold air cooler are not convenient.

[0005] Because the pressure of CO2 is very high, a maintenance unit or expansion tank needs to be added when stopping to maintain the expansion of CO2, so the filling amount of CO2 also needs to be controlled. Improving energy efficiency and reducing the filling amount of CO2 are the primary consideration factors of CO2 system design, the cold air cooler of the utility model is produced for reducing the filling amount of CO2 and considering the operation energy efficiency, which is unprecedentedly designed as CO2 direct expansion liquid supply and CO2 hot gas defrosting. SUMMARY

[0006] The utility model discloses in order to make up for the deficiency of prior art, provide a kind of CO2 cold air cooler of CO2 hot gas defrosting of direct expansion CO2 cold air supply liquid mode, CO2 filling amount is less, heat exchange efficiency is high, installation and maintenance are easy.

[0007] The utility model discloses the following technical scheme is realized:

[0008] The utility model provides a CO2 cold air machine for CO2 hot defrosting, including the coil pipe of setting on the static pressure tank bottom plate and setting up the installation through the reinforcing rib, its characterized in be: the inlet of coil pipe is connected with the liquid distribution head, and the liquid distribution head is connected with the liquid supply connecting pipe and hot defrosting coil pipe through the lateral connector parallel communication, and the hot defrosting coil pipe is installed with the hot gas inlet pipe, the outlet of coil pipe is connected with the back gas port through the back gas header, the hot defrosting coil pipe is arranged on the wind -proof water collecting tray under the static pressure tank bottom plate, the wind -proof water collecting tray is provided with the cold air machine shell around the coil pipe, and the high-stretch wind cylinder between the adjacent reinforcing rib is arranged on the cold air machine shell, the banded wind ring electric heating is arranged on the high-stretch wind cylinder, and the EBM outer rotor axial flow motor is installed on the central position of high-stretch wind cylinder, and the cold air machine shell, two adjacent reinforcing rib and static pressure tank bottom plate jointly form the static pressure tank.

[0009] The utility model discloses a CO2 cold air machine for CO2 hot defrosting, including the coil pipe of setting on the static pressure tank bottom plate and setting up the installation through the reinforcing rib, its characterized in be: the inlet of coil pipe is connected with the liquid distribution head, and the liquid distribution head is connected with the liquid supply connecting pipe and hot defrosting coil pipe through the lateral connector parallel communication, and the hot defrosting coil pipe is installed with the hot gas inlet pipe, the outlet of coil pipe is connected with the back gas port through the back gas header, the hot defrosting coil pipe is arranged on the wind -proof water collecting tray under the static pressure tank bottom plate, the wind -proof water collecting tray is provided with the cold air machine shell around the coil pipe, and the high-stretch wind cylinder between the adjacent reinforcing rib is arranged on the cold air machine shell, the banded wind ring electric heating is arranged on the high-stretch wind cylinder, and the EBM outer rotor axial flow motor is installed on the central position of high-stretch wind cylinder, and the cold air machine shell, two adjacent reinforcing rib and static pressure tank bottom plate jointly form the static pressure tank.

[0010] The utility model discloses a CO2 cold air machine for CO2 hot defrosting, including the coil pipe of setting on the static pressure tank bottom plate and setting up the installation through the reinforcing rib, its characterized in be: the inlet of coil pipe is connected with the liquid distribution head, and the liquid distribution head is connected with the liquid supply connecting pipe and hot defrosting coil pipe through the lateral connector parallel communication, and the hot defrosting coil pipe is installed with the hot gas inlet pipe, the outlet of coil pipe is connected with the back gas port through the back gas header, the hot defrosting coil pipe is arranged on the wind -proof water collecting tray under the static pressure tank bottom plate, the wind -proof water collecting tray is provided with the cold air machine shell around the coil pipe, and the high-stretch wind cylinder between the adjacent reinforcing rib is arranged on the cold air machine shell, the banded wind ring electric heating is arranged on the high-stretch wind cylinder, and the EBM outer rotor axial flow motor is installed on the central position of high-stretch wind cylinder, and the cold air machine shell, two adjacent reinforcing rib and static pressure tank bottom plate jointly form the static pressure tank.

[0011] The utility model discloses a CO2 cold air machine for CO2 hot defrosting, including the coil pipe of setting on the static pressure tank bottom plate and setting up the installation through the reinforcing rib, its characterized in be: the inlet of coil pipe is connected with the liquid distribution head, and the liquid distribution head is connected with the liquid supply connecting pipe and hot defrosting coil pipe through the lateral connector parallel communication, and the hot defrosting coil pipe is installed with the hot gas inlet pipe, the outlet of coil pipe is connected with the back gas port through the back gas header, the hot defrosting coil pipe is arranged on the wind -proof water collecting tray under the static pressure tank bottom plate, the wind -proof water collecting tray is provided with the cold air machine shell around the coil pipe, and the high-stretch wind cylinder between the adjacent reinforcing rib is arranged on the cold air machine shell, the banded wind ring electric heating is arranged on the high-stretch wind cylinder, and the EBM outer rotor axial flow motor is installed on the central position of high-stretch wind cylinder, and the cold air machine shell, two adjacent reinforcing rib and static pressure tank bottom plate jointly form the static pressure tank.

[0012] The utility model discloses a CO2 cold air machine for CO2 hot defrosting, including the coil pipe of setting on the static pressure tank bottom plate and setting up the installation through the reinforcing rib, its characterized in be: the inlet of coil pipe is connected with the liquid distribution head, and the liquid distribution head is connected with the liquid supply connecting pipe and hot defrosting coil pipe through the lateral connector parallel communication, and the hot defrosting coil pipe is installed with the hot gas inlet pipe, the outlet of coil pipe is connected with the back gas port through the back gas header, the hot defrosting coil pipe is arranged on the wind -proof water collecting tray under the static pressure tank bottom plate, the wind -proof water collecting tray is provided with the cold air machine shell around the coil pipe, and the high-stretch wind cylinder between the adjacent reinforcing rib is arranged on the cold air machine shell, the banded wind ring electric heating is arranged on the high-stretch wind cylinder, and the EBM outer rotor axial flow motor is installed on the central position of high-stretch wind cylinder, and the cold air machine shell, two adjacent reinforcing rib and static pressure tank bottom plate jointly form the static pressure tank.

[0013] The utility model discloses a CO2 cold air machine for CO2 hot defrosting, including the coil pipe of setting on the static pressure tank bottom plate and setting up the installation through the reinforcing rib, its characterized in be: the inlet of coil pipe is connected with the liquid distribution head, and the liquid distribution head is connected with the liquid supply connecting pipe and hot defrosting coil pipe through the lateral connector parallel communication, and the hot defrosting coil pipe is installed with the hot gas inlet pipe, the outlet of coil pipe is connected with the back gas port through the back gas header, the hot defrosting coil pipe is arranged on the wind -proof water collecting tray under the static pressure tank bottom plate, the wind -proof water collecting tray is provided with the cold air machine shell around the coil pipe, and the high-stretch wind cylinder between the adjacent reinforcing rib is arranged on the cold air machine shell, the banded wind ring electric heating is arranged on the high-stretch wind cylinder, and the EBM outer rotor axial flow motor is installed on the central position of high-stretch wind cylinder, and the cold air machine shell, two adjacent reinforcing rib and static pressure tank bottom plate jointly form the static pressure tank.

[0014] The utility model discloses a CO2 cold air machine for CO2 hot defrosting, including the coil pipe of setting on the static pressure tank bottom plate and setting up the installation through the reinforcing rib, its characterized in be: the inlet of coil pipe is connected with the liquid distribution head, and the liquid distribution head is connected with the liquid supply connecting pipe and hot defrosting coil pipe through the lateral connector parallel communication, and the hot defrosting coil pipe is installed with the hot gas inlet pipe, the outlet of coil pipe is connected with the back gas port through the back gas header, the hot defrosting coil pipe is arranged on the wind -proof water collecting tray under the static pressure tank bottom plate, the wind -proof water collecting tray is provided with the cold air machine shell around the coil pipe, and the high-stretch wind cylinder between the adjacent reinforcing rib is arranged on the cold air machine shell, the banded wind ring electric heating is arranged on the high-stretch wind cylinder, and the EBM outer rotor axial flow motor is installed on the central position of high-stretch wind cylinder, and the cold air machine shell, two adjacent reinforcing rib and static pressure tank bottom plate jointly form the static pressure tank.

[0015] The hot air valve is installed on the hot air inlet pipe, and the return air valve is installed on the return air outlet, so that the opening and closing of the hot air inlet pipe and the return air outlet can be adjusted; and the drain pipe is installed at the bottom of the wind shield water collecting tray to regularly drain the condensed water collected by the wind shield water collecting tray.

[0016] The high-stretch air duct is a double-horn-shaped and circular-arc-shaped air guide duct, which can reduce wind resistance and air vortex, and can improve the air volume and range of the air cooler by strengthening air guide, so as to improve the heat exchange efficiency of the air cooler.

[0017] The cold air machine shell is symmetrically installed with a plurality of supporting legs on opposite sides, the supporting legs are connected and installed with the channel steel mounting seat on the cold air machine shell through bolts, and the grounding bolt holes are formed in the bottom surface of the supporting legs.

[0018] The coil pipe, hot air inlet pipe, return air header, hot air defrosting coil pipe and liquid supply connecting pipe are all made of stainless steel, which meets the requirement of high carbon dioxide operating pressure; and the cold air machine shell is made of aluminum-zinc plated material.

[0019] The utility model discloses a reasonable structure design, flexible application adopts CO2 direct inflation liquid supply mode, can bear greater pressure drop, and pipe diameter is smaller, effectively reduces CO2 filling amount, through the setting of hydrophilic aluminum fin and windproof water saving tray, effectively improve the heat exchange efficiency, overall installation and maintenance are convenient. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described in connection with the drawings.

[0021] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0022] Figure 2 It is the main view structure schematic diagram of the utility model;

[0023] Figure 3 It is the right view structure schematic diagram of the utility model;

[0024] Figure 4 It is the internal three-dimensional structure schematic diagram of the utility model;

[0025] Figure 5 It is the internal main view structure schematic diagram of the utility model;

[0026] Figure 6 It is the internal advantage structure schematic diagram of the utility model;

[0027] Figure 7 It is the structure schematic diagram of the hot air defrosting coil pipe of the utility model.

[0028] In the figure, 1 hot gas inlet pipe, 2 return air header, 3 hot gas defrosting coil, 4 liquid supply connecting pipe, 5 lateral connector, 6 liquid distribution head, 7 coil, 8 hydrophilic aluminum fin, 9 reinforcing rib, 10 static pressure tank bottom plate, 11 windbreak water collecting tray, 12 high-stretch air duct, 13 EBM outer rotor axial flow motor, 14 strip-shaped air ring electric heating, 15 junction box, 16 supporting leg, 17 cold air machine shell, 18 return air port. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model will be described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] The utility model will be described in detail below in combination with the drawings: the embodiment includes the coil 7 installed on the static pressure tank bottom plate 10 and is erected and installed through the reinforcing rib 9, the inlet of the coil 7 is connected with the liquid distribution head 6, the liquid distribution head 6 is connected with the liquid supply connecting pipe 4 and the hot gas defrosting coil 3 through the lateral connector 5 parallel communication, the hot gas defrosting coil 3 is installed with the hot gas inlet pipe 1; The outlet of the coil 7 is connected with the return air port 18 through the return air header 2; The hot gas defrosting coil 3 is arranged on the windbreak water collecting tray 11 below the static pressure tank bottom plate 10, the windbreak water collecting tray 11 is provided with the cold air machine shell 17 surrounding the coil 7, and the high-stretch air duct 12 between the adjacent reinforcing ribs 9 is arranged on the cold air machine shell 17, the strip-shaped air ring electric heating 14 is arranged on the high-stretch air duct 12, and the EBM outer rotor axial flow motor 13 is installed at the center position of the high-stretch air duct 12; The cold air machine shell 17, the two adjacent reinforcing ribs 9 and the static pressure tank bottom plate 10 jointly form a static pressure tank.

[0032] As shown in the drawings, the junction box 15 is installed on the cold air machine shell 17, and the junction box 15 is connected with the EBM outer rotor axial flow motor 13 and the strip-shaped air ring electric heating 14 through the power supply line respectively. Figure 1 As shown in the drawings, the junction box 15 is installed on the cold air machine shell 17, and the junction box 15 is connected with the EBM outer rotor axial flow motor 13 and the strip-shaped air ring electric heating 14 through the power supply line respectively.

[0033] Figure 4 ​As shown, the reinforcing rib 9 includes side plate reinforcing ribs on both sides of the coil pipe 7 and rib plate reinforcing ribs evenly distributed between the coil pipes 7, the side plate reinforcing ribs are extended from both sides of the coil pipe 7 and connected by elbows to form a loop in pairs; the coil pipe 7 transversely passes through the evenly distributed louvered hydrophilic aluminum fins 8.

[0034] The liquid supply connecting pipe 4 is installed by the support frame on the reinforcing rib 9, and a liquid supply valve is installed on the liquid supply connecting pipe 4; a hot gas valve is installed on the hot gas inlet pipe 1, a return gas valve is installed on the return gas port 18, and a drain pipe is installed at the bottom of the wind-blocking water receiving disc 11.

[0035] The refrigeration working principle of the cold air machine is that: the low-temperature CO2 liquid direct expansion liquid supply enters the heat exchange assembly (including the coil pipe 7 and the hydrophilic aluminum fin 8) through the liquid supply connecting pipe 4, the lateral connector 5 and the liquid distributor 6, and after cold and heat exchange with the air in the cold room, the low-temperature CO2 liquid becomes low-temperature CO2 gas, which returns to the gas-liquid separator through the return gas header 2 and the return gas port 18 and is sucked away by the compressor.

[0036] The defrosting working principle of the cold air machine is that: the liquid supply valve of the liquid supply connecting pipe 4 and the return gas valve on the return gas port 18 are closed, and the hot gas valve of the hot gas inlet pipe 1 is opened, the high-temperature and high-pressure CO2 gas enters the hot gas defrosting coil pipe 3 through the hot gas inlet pipe 1, and then enters the heat exchange assembly (including the coil pipe 7 and the hydrophilic aluminum fin 8) through the lateral connector 5 and the liquid distributor 6, the ice on the surface of the heat exchange assembly is melted, the high-temperature and high-pressure CO2 gas becomes medium-temperature CO2 liquid, and is discharged to the liquid discharge barrel or the liquid supply pipe through the return gas header 2 and the return gas port 18, and the defrosting is completed.

[0037] In the embodiment, the hydrophilic aluminum fin 8 is a hydrophilic aluminum foil windowed sheet, and the windowed directions of adjacent hydrophilic aluminum fins 8 are asymmetrically windowed, and the windowed sheets are arranged in a regular rhombus shape. The coil pipe 7 passes through the hydrophilic aluminum fin, and the hydraulic expansion pipe makes the coil pipe 7 and the hydrophilic aluminum fin 8 tightly combined, in order to prevent the deformation of the coil pipe 7 and the hydrophilic aluminum fin 8, the reinforcing rib 9 on both sides of the high-tension air cylinder 12 uses the "floating coil" technology, and an aluminum-magnesium alloy end disc is used for support, which can effectively avoid the wear of the coil pipe 7 during operation and transportation, and prevent leakage. The fin group is provided with a static pressure tank bottom plate 10 and a wind-blocking water receiving disc 11 at the bottom, so that the wind cannot pass through the wind-blocking water receiving disc 11, more wind passes through the fin group, and a larger heat exchange amount is obtained; in order to prevent air mixing and mutual infection, the cold air machine shell 17, the reinforcing rib 9 and the static pressure tank bottom plate 10 form an independent and sealed static pressure tank for each high-tension air cylinder 12, and the heat exchange efficiency is improved.

[0038] The air circulation process of the air cooler is as follows: the aperture in the cold chamber is sucked in by the EBM outer rotor axial flow motor 13, passes through the high-stretch wind cylinder 12 with the strip-shaped wind ring electric heating 14, and exchanges heat with the low-temperature CO2 liquid in the heat exchange assembly (including the coil pipe 7 and the hydrophilic aluminum fin 8), and blows out the cold air, so that the air cooling process is realized.

[0039] In the prior art, the wooden box packaging of the general air cooler is used to protect the water tray, and the water tray is generally upward, so that the water tray should be below when the air cooler is hoisted, and the air cooler needs to be turned over by 180 degrees during installation, which increases the construction difficulty of installation.

[0040] In the further preferred embodiment, the coil pipe 7, the hot gas inlet pipe 1, the gas return header 2, the hot gas defrosting coil pipe 3 and the liquid supply connecting pipe 4 are all made of stainless steel, and the air cooler shell 17 is made of aluminum-zinc plating material.

[0041] The technical effects of the air cooler are as follows:

[0042] (1) The filling amount of the CO2 air cooler with direct expansion and liquid supply is reduced, the cycle ratio of the direct expansion and liquid supply is 1, the cycle ratio of the barrel pump liquid supply is 2-5, and the filling amount of each air cooler is reduced by more than 50%;

[0043] (2) The hot gas defrosting CO2 air cooler is all hot gas defrosting, and the wind-blocking water receiving tray is also defrosted by hot gas, compared with the air cooler defrosted by water and the water receiving tray defrosted by electricity, each air cooler saves electric energy by more than 35%;

[0044] (3) The defrosting mode of the CO2 air cooler is commonly water defrosting, and the defrosting and dripping time is long, which easily causes dripping, mist, food mildew and other conditions in the cold storage, and the hot gas defrosting time is shortened by more than 40% than the water defrosting time;

[0045] (4) The application of the double-horn-shaped flow guide wind cylinder increases the heat exchange efficiency by more than 10%;

[0046] (5) The wind-blocking water receiving plate is arranged at the bottom of the fin group, which prevents the wind from passing through the water receiving tray, so that more wind passes through the fin group, a larger heat exchange amount is obtained, and the heat exchange amount is increased by more than 8%;

[0047] (6) Application of hydrophilic aluminum fin with flange louver, the coil perforating die is adjustable, only the holes are opened where needed, the effective heat exchange area is larger, and the heat exchange efficiency of the air cooler with the same area is increased by more than 10%;

[0048] (7) Application of independent sealed static pressure tank, the heat exchange efficiency is increased by more than 10%;

[0049] (8) Application of upper supporting leg of the air cooler, the transportation and installation convenience are improved, and the installation efficiency is increased by more than 50%.

[0050] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or part or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should be covered in the scope of the claims and the specification of the utility model.

Claims

1. A CO2 cold air machine for CO2 hot gas defrosting in a direct expansion liquid supply mode, comprising a coil (7) mounted on a static pressure box bottom plate (10) and erected and mounted by a reinforcing rib (9), characterized in that: The inlet of the coil pipe (7) is connected with a distribution head (6), the distribution head (6) is connected with a liquid supply pipe (4) and a hot gas defrosting coil pipe (3) in parallel through a lateral connector (5), the hot gas defrosting coil pipe (3) is provided with a hot gas inlet pipe (1); the outlet of the coil pipe (7) is connected with a gas return port (18) through a gas return header (2); the hot gas defrosting coil pipe (3) is arranged on a wind-blocking water-collecting disc (11) below a static pressure tank bottom plate (10), the wind-blocking water-collecting disc (11) is provided with a cold air fan shell (17) surrounding the coil pipe (7), and a high-stretch wind cylinder (12) is arranged on the cold air fan shell (17) between adjacent reinforcing ribs (9), the high-stretch wind cylinder (12) is provided with a strip-shaped air ring electric heating device (14), and an EBM outer rotor axial flow motor (13) is arranged at the center position of the high-stretch wind cylinder (12); the cold air fan shell (17), the two adjacent reinforcing ribs (9) and the static pressure tank bottom plate (10) jointly form a static pressure tank.

2. The CO2 cold air blower for CO2 heat gasification defrosting according to claim 1, wherein: The cold air fan shell (17) is provided with a junction box (15), the junction box (15) is connected with the EBM outer rotor axial flow motor (13) and the strip-shaped air ring electric heating device (14) through power supply lines.

3. The CO2 cold air machine for CO2 heat gasification defrosting according to claim 1, wherein: The reinforcing rib (9) comprises a side plate reinforcing rib arranged on both sides of the coil pipe (7) and a rib plate reinforcing rib uniformly distributed between the coil pipes (7), the side plate reinforcing rib is arranged on both sides of the coil pipe (7) and connected in pairs through elbows to form a loop; the coil pipe (7) passes through the uniformly distributed hydrophilic aluminum fin (8) with a flanged louver in a transverse direction.

4. The CO2 cold air machine for CO2 heat gasification defrosting according to claim 3, wherein: The hydrophilic aluminum fin (8) is a hydrophilic aluminum foil windowed fin, and the windowed directions of adjacent hydrophilic aluminum fins (8) are asymmetrically windowed, and the windowed fins are arranged in a regular rhombus shape.

5. The CO2 cold air machine for CO2 heat gasification defrosting according to claim 1, wherein: the CO2 cold air machine is a CO2 direct expansion type CO2 cold air machine for CO2 heat gasification defrosting. The liquid supply pipe (4) is installed through a support frame on the reinforcing rib (9), and the liquid supply pipe (4) is provided with a liquid supply valve.

6. The CO2 cold air machine for CO2 heat gasification defrosting according to claim 1, wherein: The hot gas inlet pipe (1) is provided with a hot gas valve, the gas return port (18) is provided with a gas return valve, and a drain pipe is arranged at the bottom of the wind-blocking water-collecting disc (11).

7. The CO2 cold air machine for CO2 heat gasification defrosting according to claim 1, wherein: The high-stretch wind cylinder (12) is a double-horn-shaped and circular-arc-shaped flow guide cylinder.

8. The CO2 cold air machine for CO2 heat gasification defrosting according to claim 1, wherein: Symmetrical legs (16) are arranged on opposite sides of the cold air fan shell (17), the legs (16) are connected and installed through bolts and channel steel mounting seats on the cold air fan shell (17), and grounding bolt holes are arranged on the bottom surface of the legs (16).

9. The CO2 cold air machine for CO2 heat gasification defrosting according to claim 1, wherein: The coil pipe (7), the hot gas inlet pipe (1), the gas return header (2), the hot gas defrosting coil pipe (3) and the liquid supply pipe (4) are made of stainless steel, and the cold air fan shell (17) is made of aluminum-zinc plated material.

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