Ultralow-temperature variable-frequency cooling and heating machine

Abstract

The invention discloses an ultralow-temperature variable-frequency cooling and heating machine which comprises a protection box and an upper air inlet pipe installed on the upper side of the protection box. A lower air inlet pipe is mounted on the lower side of the protection box; a heat exchange tube is mounted on the inner side of the protection box; the device further comprises an upper plugging plate; the protection box is movably connected with an upper plugging plate; the protection box is movably connected with a lower plugging plate; an upper air outlet pipe is arranged on the upper side of the protection box; a lower air outlet pipe is arranged on the lower side of the protection box; an upper baffle is mounted on the inner side of the upper air outlet pipe; a lower baffle is mounted on the inner side of the lower air outlet pipe; adjusting rods for controlling switches of the upper air inlet pipe, the lower air inlet pipe, the upper air outlet pipe and the lower air outlet pipe are mounted on the protection box; a plurality of sliding blocks are arranged on the inner side of the protection box. A fixing plate is jointly mounted among the plurality of sliding blocks; preliminary disturbing airflow is formed in the protection box through the fixing plate, then boundary layers on the surfaces of the heat exchange pipes are damaged through the disturbing airflow, mixing of cold airflow and hot airflow is achieved, and the heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cooling and heating machines, in particular to an ultra-low temperature variable frequency cooling and heating machine. BACKGROUND

[0002] In the prior art, the ultra-low temperature cooling and heating variable frequency machine moves the fan to suck the external gas into the interior of the variable frequency machine, and then makes the gas contact with the surface of the heat exchange pipe through which the refrigerant flows, so that the refrigerant absorbs the heat in the air to realize heat transfer, and finally the heat is transported to the indoor for temperature rising operation. Conversely, when cooling is needed, the flow direction of the refrigerant is changed to absorb the heat of the indoor air, thereby completing the entire heating and cooling operation. In the heat exchange process of the prior art, the maximum resistance of heat exchange is the laminar bottom layer (boundary layer) attached to the surface of the heat exchange pipe. The existence of the laminar bottom layer forms a static boundary layer on the surface of the heat exchange pipe, which causes the cold\hot air to be unable to contact the surface of the heat exchange pipe more fully, resulting in a decrease in the heat exchange effect. SUMMARY

[0003] In order to overcome the shortcomings of the prior art that the static boundary layer causes the cold\hot air to be unable to contact the surface of the heat exchange pipe more fully, resulting in a decrease in the heat exchange effect, the present application provides an ultra-low temperature variable frequency cooling and heating machine.

[0004] The technical scheme is as follows: an ultra-low temperature variable frequency cooling and heating machine, comprising a protective box and an upper air inlet pipe installed on the upper side of the protective box; a lower air inlet pipe is installed on the lower side of the protective box; a heat exchange pipe is installed on the inner side of the protective box; further comprising an upper sealing plate; the upper sealing plate is movably connected to the upper side of the protective box; a lower sealing plate is movably connected to the upper side of the protective box; an upper air outlet pipe is arranged on the upper side of the protective box; a lower air outlet pipe is arranged on the lower side of the protective box; an upper baffle for blocking the upper air outlet pipe is installed on the inner side of the upper air outlet pipe; a lower baffle for blocking the lower air outlet pipe is installed on the inner side of the lower air outlet pipe; an adjusting rod for controlling the opening and closing of the upper air inlet pipe, the lower air inlet pipe, the upper air outlet pipe and the lower air outlet pipe is installed on the protective box; a plurality of sliding blocks are arranged on the inner side of the protective box; a fixing plate is jointly installed between the plurality of sliding blocks.

[0005] Preferably, the upper air inlet pipe and the lower air inlet pipe are both arranged in a trapezoidal shape, and the air inlet ports of both are arranged in an expanded shape.

[0006] Preferably, an upper air vent is formed in the rear side of the upper air inlet pipe and communicates with the interior of the protective box; the upper air vent is blocked by the upper sealing plate; a lower air vent is formed in the rear side of the lower air inlet pipe and communicates with the interior of the protective box, and the lower air vent is blocked by the lower sealing plate.

[0007] Preferably, both the upper and lower sealing plates are rotatably connected to the protective box via a rotating shaft. The upper and lower surfaces of the adjusting rod are provided with racks. The rotating shaft has two through holes arranged vertically, and each of the two through holes is provided with a driven tooth that matches the rack.

[0008] Preferably, the upper baffle and the lower baffle are also rotatably connected to the protective box via a rotating shaft, and the rotation method of the two is consistent with the aforementioned rotation method of the upper sealing plate and the lower sealing plate.

[0009] Preferably, it also includes an upper spiral fan blade ring, a compression ring, a turbulence ring, a lower spiral fan blade ring, an airbag, and a cleaning sponge; several upper spiral fan blade rings are arranged horizontally on the fixed plate; an airbag is provided on the lower side of the upper spiral fan blade ring; a compression ring is fixedly connected to the inner side of the upper spiral fan blade ring; a turbulence ring for turbulent airflow is fixedly connected to the lower side of the compression ring; a cleaning sponge for rapid cleaning of condensate from the heat exchange tube is fixedly connected to the upper side of the turbulence ring; and a lower spiral fan blade ring is fixedly connected to the lower surface of the compression ring.

[0010] Preferably, the upper spiral fan blade ring is configured as a hollow structure and is connected to the air bladder, while the air bladder is configured to expand only towards the side closer to the heat exchange tube when inflated.

[0011] Preferably, the compression ring is made of plastic material with a certain deformation capability, with an annular opening on its upper side and a hollow structure inside, and the annular opening on its upper side is at the same horizontal height as the cleaning sponge.

[0012] Preferably, the airbag and the cleaning sponge are at the same horizontal level.

[0013] Preferably, the inner ring surface of the cleaning sponge is set to be in contact with the surface of the heat exchange tube.

[0014] The beneficial effects of the present invention are: the present invention achieves the initial turbulent airflow in the protective box through the fixed plate, and then the boundary layer on the surface of the heat exchange tube is destroyed by the turbulent airflow, thereby achieving the mixing of hot and cold airflow and improving heat exchange efficiency. By changing the direction of air intake, the contact between the overly stable airflow and the surface of the heat exchange tube is avoided, thus preventing the formation of a stable laminar sublayer that would result in poor heat exchange performance. By setting up a protective box, the heat exchange tubes can be effectively isolated from the external environment. Even when not in use or in severe weather, they can still provide protection and avoid damage. Turbulence can effectively prevent dust adsorption. At the same time, the constantly changing airflow can effectively blow away and clean the dust adsorbed on the surface of the heat exchange tube, preventing it from accumulating under stable airflow conditions and affecting the heat exchange effect. The heat exchange pipe can be cleaned without disassembly, residual sewage in the cold and warm machine is effectively prevented, the cleaning efficiency is effectively improved, and the cost is reduced. The liquid water condensed on the surface of the heat exchange pipe is cleaned by the cleaning sponge, and further turbulence operation is realized by the continuously rotating turbulence ring, so that the heat exchange effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The ultralow-temperature variable-frequency cooling and heating machine of the present application Figure 1 A perspective structural schematic view; Figure 2 The ultralow-temperature variable-frequency cooling and heating machine of the present application Figure 2 A perspective structural schematic view; Figure 3 A sectional view of the protective box of the present application; Figure 4 A combined perspective structural schematic view of the upper blocking plate and the upper air inlet pipe of the present application; Figure 5 A combined perspective structural schematic view of the upper blocking plate, the lower blocking plate, the upper air outlet pipe and the lower air outlet pipe of the present application; Figure 6 A combined front view of the upper baffle plate and the lower baffle plate of the present application; Figure 7 A combined perspective structural schematic view of the upper blocking plate and the adjusting rod of the present application; Figure 8 A perspective structural schematic view of the adjusting rod of the present application; Figure 9 A combined perspective structural schematic view of the adjusting rod and the fixing plate of the present application; Figure 10 A perspective structural schematic view of the lower adjusting block of the present application; Figure 11 A perspective structural schematic view of the first part of the present application; Figure 12 A perspective structural schematic view of the second part of the present application.

[0016] Mark 1-protective box, 2-upper air inlet pipe, 3-lower air inlet pipe, 4-heat exchange pipe, 101-upper blocking plate, 102-lower blocking plate, 103-upper air outlet pipe, 104-lower air outlet pipe, 105-upper baffle plate, 106-lower baffle plate, 107-adjusting rod, 10701-upper adjusting block, 10702-lower adjusting block, 108-sliding block, 109-upper spiral fan ring, 1010-extrusion ring, 1011-turbulence ring, 1012-lower spiral fan ring, 1013-air bag, 1014-cleaning sponge, 1015-fixing plate. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1:

[0019] An ultra-low temperature inverter air conditioner, such as Figures 1-11 As shown, it includes a protective box 1 and an upper air inlet pipe 2; the upper air inlet pipe 2 is installed on the upper side of the protective box 1; the lower air inlet pipe 3 is installed on the lower side of the protective box 1; the heat exchange pipe 4 is installed inside the protective box 1; air is alternately introduced through the upper air inlet pipe 2 and the lower air inlet pipe 3, and the heat exchange pipe 4 is assisted in exchanging and absorbing heat from the gas. It also includes an upper sealing plate 101, a lower sealing plate 102, an upper air outlet duct 103, a lower air outlet duct 104, an upper baffle 105, a lower baffle 106, an adjusting rod 107, a slider 108, and a fixing plate 1015; the upper air inlet duct 2 has an upper vent opening on its rear side that communicates with the interior of the protective box 1; the upper sealing plate 101 is movably connected to the protective box 1, and the upper vent opening is blocked by the upper sealing plate 101; the lower air inlet duct 3 has a lower vent opening on its rear side that communicates with the interior of the protective box 1; the lower air inlet duct 102 is movably connected to the protective box 1. The sealing plate 102 blocks the lower vent; the upper side of the protective box 1 is provided with an upper air outlet duct 103; the lower side of the protective box 1 is provided with a lower air outlet duct 104; an upper baffle 105 is installed inside the upper air outlet duct 103; a lower baffle 106 is installed inside the lower air outlet duct 104; an adjusting rod 107 is installed on the protective box 1; four sliders 108 are provided inside the protective box 1; a fixing plate 1015 is installed between the four sliders 108, and the fixing plate 1015 is made of lightweight plastic material.

[0020] Both the upper air inlet pipe 2 and the lower air inlet pipe 3 are trapezoidal, and both have flared inlets to accelerate gas flow, increase turbulence, and improve heat exchange efficiency.

[0021] The upper sealing plate 101 and the lower sealing plate 102 are rotatably connected to the protective box 1 via a rotating shaft. The upper and lower surfaces of the adjusting rod 107 are provided with racks. The rotating shaft has two vertically arranged through holes, and each of the two through holes is provided with a driven tooth that matches the rack. By moving the adjusting rod 107 up and down, the driven tooth is driven to rotate, thereby realizing the rotation of the upper sealing plate 101 and the lower sealing plate 102.

[0022] The upper baffle 105 and the lower baffle 106 are also rotatably connected to the protective box 1 via a rotating shaft, and their rotation method is consistent with the above-mentioned rotation method of the upper sealing plate 101 and the lower sealing plate 102.

[0023] Before starting work, first install the device in the existing ultra-low temperature cold and warm variable frequency machine air inlet, in the prior art, the ultra-low temperature cold and warm variable frequency machine through the fan movement, the outside air is sucked into the variable frequency machine, and then the gas is contacted with the surface of the heat exchange pipe 4 in the internal circulation of refrigerant, and then the refrigerant absorbs the heat in the air, realizes the heat transfer, and finally through a series of processes, the heat is transported to the indoor to realize the heating operation, on the contrary, when cooling is needed, by changing the circulation direction of the refrigerant, the heat of the indoor air is absorbed, and the whole heating and cooling operation is completed. In the prior art, the maximum resistance of heat exchange is the laminar bottom layer (boundary layer, generally caused by too stable gas circulation) attached to the surface of the heat exchange pipe 4. The existence of the laminar bottom layer forms a static boundary layer on the surface of the heat exchange pipe 4. The existence of the static boundary layer causes the cold\hot air to be unable to contact the surface of the heat exchange pipe 4 more fully, resulting in a decrease in the heat exchange effect.

[0024] In order to solve the above problems, when it is needed to start using, first make the upper air inlet pipe 2 and the lower air inlet pipe 3 communicate with the air inlet of the external fan. In the initial state, as shown in Figure 4 and Figure 5 , at this time, the upper air inlet pipe 2 is in communication with the inside of the protection box 1, and the lower air inlet pipe 3 is not in communication with the protection box 1. At the same time, as shown in Figure 6As shown, at this time, the upper air outlet pipe 103 is covered by the upper baffle 105 and does not communicate with the inside of the protection box 1, and the lower air outlet pipe 104 is in a state of communicating with the inside of the protection box 1, so when the external airflow is transported into the upper air inlet pipe 2 by the fan, the air enters the protection box 1 from the upper air inlet pipe 2, then contacts the heat exchange pipe 4 to realize heat exchange operation, and the gas after heat exchange is discharged from the lower air outlet pipe 104. In this process, when the airflow enters the protection box 1 and moves downward, the fixed plate 1015 moves downward under the action of the airflow blowing, and then the sliding block 108 slides downward in the protection box 1. In this process, since the airflow is hindered by the fixed plate 1015, a preliminary disturbed airflow can be formed in the protection box 1 during the downward movement of the fixed plate 1015, and then the boundary layer on the surface of the heat exchange pipe 4 is destroyed through the disturbed airflow, so as to mix the cold and hot airflows and improve the heat exchange efficiency. With the continuous downward movement of the fixed plate 1015, when the fixed plate 1015 moves to contact the lower adjusting block 10702, the fixed plate 1015 moves downward by pulling the lower adjusting block 10702, and then the adjusting rod 107 moves downward synchronously. In this process, the gear on the shaft of the upper blocking plate 101 is driven to rotate ninety degrees through the gear on the upper side of the outer surface of the adjusting rod 107, and then the upper air inlet pipe 2 is gradually blocked with the protection box 1. At the same time, the gear on the shaft of the lower blocking plate 102 is driven to rotate ninety degrees through the gear on the lower side of the outer surface of the adjusting rod 107, so that the lower air inlet pipe 3 communicates with the protection box 1. At this time, the external airflow enters the inside of the protection box 1 through the lower air inlet pipe 3 and exchanges heat with the heat exchange pipe 4. At the same time, the lower air outlet pipe 104 is blocked by the upper baffle 105 at this time, and the upper air outlet pipe 103 is in an open state, so as to realize the conversion operation of the air inlet direction, avoid the stable airflow contacting the surface of the heat exchange pipe 4 to form a stable laminar flow bottom layer, and cause poor heat exchange effect. On the contrary, when the airflow enters from the lower air inlet pipe 3, the fixed plate 1015 is blown upward synchronously, and when the fixed plate 1015 moves to contact the upper adjusting block 10701 and pushes the upper adjusting block 10701 to move upward, the operation opposite to the above air inlet and outlet direction is completed, so as to realize the rapid conversion of the airflow circulation. Compared with the stable and open airflow circulation path in the prior art, the heat exchange efficiency is more efficient and stable.

[0025] Further, since the existing heat exchange pipe 4 is installed inside the air conditioner and can directly contact with the outside air, in the case of rain and wind weather and long-term use, there will be obvious damage and dirt problems. Since the heat exchange pipe 4 is usually made of thin copper pipe with good heat exchange effect, it is easy to wear and deform. Therefore, in the case of direct contact with the outside air, long-term use can easily cause aging, greatly shortening its service life. Therefore, the protective box 1 can effectively block the heat exchange pipe 4 from the outside environment. In the case of not using or in bad weather, it can still play a protective effect to avoid damage. At the same time, the above-mentioned operation of continuously changing the airflow path can effectively prevent dust in the air from being adsorbed on the surface of the heat exchange pipe 4. The turbulence operation can effectively prevent the dust from being adsorbed, and the airflow continuously changing direction can effectively blow and clean the dust adsorbed on the surface of the heat exchange pipe 4, avoiding the accumulation of dust in a stable airflow state and affecting the heat exchange effect.

[0026] At the same time, in the prior art, the outer surface of the heat exchange pipe 4 needs to be cleaned irregularly. Generally, the heat exchange pipe 4 needs to be manually disassembled, and then wiped and cleaned. The disassembly process is complicated, and manual installation is also required afterwards. The entire process requires a lot of time and labor, and the cost is extremely high. In order to simplify the cleaning process and reduce the difficulty, when the heat exchange pipe 4 needs to be cleaned and dusted in the present application, as shown in Figure 5 , the lower air inlet pipe 3 is closed and the upper air inlet pipe 2 is opened. Only the cleaning water is manually introduced into the protective box 1 through the water pipe, and then the surface of the heat exchange pipe 4 is soaked and flushed for a short time to clean and flush the dust on the surface. At the same time, the sewage after cleaning is discharged through the lower air outlet pipe 104. The lower air outlet pipe 104 also needs to be connected with an exhaust pipe during normal air outlet use to discharge the heat-exchanged gas. At this time, the exhaust pipe is manually arranged outside the air conditioner, so that the sewage is discharged synchronously, thereby realizing the cleaning and flushing of the heat exchange pipe 4 without disassembly, effectively preventing the sewage from remaining in the air conditioner, and effectively improving the cleaning efficiency and reducing the cost.

[0027] Embodiment 2:

[0028] On the basis of embodiment 1, as shown in Figure 10 and Figure 12As shown, it also includes the upper spiral vane ring 109, the extrusion ring 1010, the spoiler ring 1011, the lower spiral vane ring 1012, the air bag 1013 and the cleaning sponge 1014; a plurality of upper spiral vane rings 109 are arranged horizontally on the fixed plate 1015; the air bag 1013 is arranged on the lower side of the upper spiral vane ring 109; the extrusion ring 1010 is fixedly connected to the inner side of the upper spiral vane ring 109, and the air bag 1013 is located on the upper side of the outer ring surface of the extrusion ring 1010; the spoiler ring 1011 is fixedly connected to the lower side of the extrusion ring 1010; the cleaning sponge 1014 is fixedly connected to the upper side of the spoiler ring 1011; and the lower spiral vane ring 1012 is fixedly connected to the lower surface of the extrusion ring 1010.

[0029] The upper spiral vane ring 109 is arranged in a hollow structure and communicates with the air bag 1013, and the air bag 1013 is arranged to be inflated only to the side close to the heat exchange pipe 4.

[0030] The extrusion ring 1010 is made of plastic material with certain deformation capacity, the upper side of which is provided with an annular opening, the inside of which is arranged in a hollow structure, and the annular opening arranged on the upper side is at the same horizontal height as the cleaning sponge 1014.

[0031] The height of the air bag 1013 is at the same horizontal height position as the cleaning sponge 1014.

[0032] The inner ring surface of the cleaning sponge 1014 is arranged in contact with the surface of the heat exchange pipe 4.

[0033] In the prior art, in the process of air heat exchange, when the external air blower is used for air extraction, the extracted is external air, and there may be certain humidity in the air, so that in the heat exchange process, obvious condensation phenomenon occurs on the surface of the heat exchange pipe 4, thereby affecting the heat absorption efficiency of the refrigerant to the air. Therefore, in order to solve the problem, when the air flow enters the protection box 1 from the upper air inlet pipe 2, the upper spiral vane ring 109 rotates synchronously under the action of the air flow, at the same time, the upper spiral vane ring 109 also moves downward synchronously with the fixed plate 1015, in the process, in order to further improve the spoiler effect and destroy the laminar flow bottom layer, when the upper spiral vane ring 109 rotates, the spoiler ring 1011 rotates synchronously, thereby realizing further spoiler operation, secondly, with the downward movement of the cleaning sponge 1014, the liquid water condensed on the surface of the heat exchange pipe 4 is cleaned through the cleaning sponge 1014, at the same time, when the gas enters from the upper air inlet pipe 2, the gas synchronously enters the inside of the air bag 1013, so that the air bag 1013 expands to the side close to the heat exchange pipe 4, thereby deforming the upper side of the extrusion ring 1010 and contacting the air bag 1013 to extrude it, realizing the cleaning of the water absorbed in the cleaning sponge 1014, and in the air flow conversion, that is, when the lower air inlet pipe 3 is used for air inlet, the lower spiral vane ring 1012 is driven to rotate, realizing continuous spoiler operation, thereby further improving the heat exchange effect.

[0034] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An ultra-low temperature variable frequency cooling and heating machine, comprising a protective box (1) and an upper air inlet pipe (2) installed on the upper side of the protective box (1); a lower air inlet pipe (3) is installed on the lower side of the protective box (1); a heat exchange pipe (4) is installed on the inner side of the protective box (1); characterized in that: The upper blocking plate (101) is movably connected to the protection box (1); the lower blocking plate (102) is movably connected to the protection box (1); the upper air outlet pipe (103) is arranged on the upper side of the protection box (1); and the lower air outlet pipe (104) is arranged on the lower side of the protection box (1). The upper air outlet pipe (103) is internally provided with the upper baffle (105) for blocking the upper air outlet pipe (103); the lower air outlet pipe (104) is internally provided with the lower baffle (106) for blocking the lower air outlet pipe (104); the adjustment rod (107) is arranged on the protection box (1) and used for controlling the opening and closing of the upper air inlet pipe (2), the lower air inlet pipe (3), the upper air outlet pipe (103) and the lower air outlet pipe (104); the protection box (1) is internally provided with a plurality of sliding blocks (108); and the plurality of sliding blocks (108) are jointly provided with the fixed plate (1015).

2. The ultra-low temperature variable frequency cooling and heating machine according to claim 1, characterized in that: The upper air inlet pipe (2) and the lower air inlet pipe (3) are both arranged in the shape of a trapezoid, and the air inlets of the two are both arranged in the shape of an expanding mouth.

3. The ultra-low temperature variable frequency cooling and heating machine according to claim 1, characterized in that: The upper air inlet pipe (2) is provided with the upper air passage on the rear side and in communication with the inside of the protection box (1); the upper air passage is blocked by the upper blocking plate (101); the lower air inlet pipe (3) is provided with the lower air passage on the rear side and in communication with the inside of the protection box (1), and the lower air passage is blocked by the lower blocking plate (102).

4. The ultra-low temperature variable frequency cooling and heating machine according to claim 1, characterized in that: The upper blocking plate (101) and the lower blocking plate (102) are both rotatably connected to the protection box (1) through the rotating shafts; the adjustment rod (107) is provided with the gear racks on the upper and lower surfaces; the rotating shafts are provided with the two through holes arranged in the shape of a vertical, and the two through holes are both provided with the driven gears matched with the gear racks.

5. The ultra-low temperature variable frequency cooling and heating machine according to claim 4, characterized in that: The upper baffle (105) and the lower baffle (106) are also rotatably connected to the protection box (1) through the rotating shafts, and the rotating modes of the two are consistent with the rotating mode of the upper blocking plate (101) and the lower blocking plate (102).

6. The ultra-low temperature variable frequency cooling and heating machine according to claim 1, characterized in that: The protection box (1) is also provided with the upper spiral vane ring (109), the extrusion ring (1010), the spoiler ring (1011), the lower spiral vane ring (1012), the air bag (1013) and the cleaning sponge (1014); the fixed plate (1015) is horizontally provided with a plurality of upper spiral vane rings (109); the upper spiral vane ring (109) is provided with the air bag (1013) on the lower side; the extrusion ring (1010) is fixedly connected to the inner side of the upper spiral vane ring (109); the spoiler ring (1011) for disturbing the airflow is fixedly connected to the lower side of the extrusion ring (1010); the cleaning sponge (1014) for quickly cleaning the condensed water vapor of the heat exchange pipe (4) is fixedly connected to the upper side of the spoiler ring (1011); and the lower spiral vane ring (1012) is fixedly connected to the lower surface of the extrusion ring (1010).

7. The ultra-low temperature variable frequency cooling and heating machine according to claim 6, characterized in that: The upper spiral vane ring (109) is arranged in a hollow structure and in communication with the air bag (1013), and the air bag (1013) is arranged to be inflated only to the side close to the heat exchange pipe (4).

8. The ultra-low temperature variable frequency cooling and heating machine according to claim 6, characterized in that: The extrusion ring (1010) is made of plastic material with a certain deformation capacity, is provided with a ring-shaped opening on the upper side, is internally arranged in a hollow structure, and the ring-shaped opening arranged on the upper side is at the same horizontal height as the cleaning sponge (1014).

9. The ultra-low temperature variable refrigerant package of claim 6, wherein: The height of the air bag (1013) and the height of the cleaning sponge (1014) are at the same level.

10. The ultra-low temperature variable refrigerant package of claim 9, wherein: The inner ring surface of the cleaning sponge (1014) is arranged in contact with the surface of the heat exchange pipe (4).

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