Air conditioning unit using liquid nitrogen refrigeration

Abstract

This utility model provides an air conditioning unit using liquid nitrogen refrigeration, relating to the field of air conditioning unit refrigeration technology. It includes: a housing with an air inlet and an air outlet on its side walls; a first fan located at the air inlet for blowing outside air into the housing; a second fan located at the air outlet for blowing inside air out of the housing; and a refrigeration unit having a first feed end, a first discharge end, and a refrigeration section. The first feed end and the first discharge end penetrate the side walls of the housing and extend to the outside of the housing. The refrigeration section is located inside the housing. The first feed end is used to introduce liquid nitrogen, the first discharge end is used to discharge nitrogen gas, and the refrigeration section is used to absorb heat and cool the air inside the housing. This air conditioning unit, by replacing the 7°C chilled water pipes with liquid nitrogen frequently used in factories, vaporizes the liquid nitrogen and absorbs heat from the air, thus avoiding freezing and blockage damage to the pipes while making reasonable use of resources.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning unit refrigeration technology, specifically to an air conditioning unit that uses liquid nitrogen refrigeration. Background Technology

[0002] Currently, according to data from the polysilicon industry, there are several typical problems in the operation of industrial air conditioning systems. Among these, especially in northern climates during winter, pipe bundle freezing and blockage are common causes of pipe bundle damage. The main reason for this is that the 7℃ chilled water used has low cooling efficiency and is prone to pipe bundle freezing and blockage, resulting in high costs for pipe bundle repair and replacement. Utility Model Content

[0003] This invention addresses the problem of low cooling efficiency of 7°C chilled water, which easily leads to pipe blockage and high maintenance and replacement costs. It provides an air conditioning unit that uses liquid nitrogen for refrigeration. By replacing the 7°C chilled water pipeline with liquid nitrogen, which is frequently used in factories, the liquid nitrogen is vaporized and absorbs heat from the air. This avoids pipe blockage and damage while making reasonable use of resources.

[0004] The technical solution adopted in this utility model is:

[0005] An air conditioning unit using liquid nitrogen refrigeration is provided, comprising:

[0006] The enclosure has air inlets and outlets on different side walls; a first fan is located on the inner wall of the enclosure at the air inlet, used to blow air from outside the enclosure into the enclosure; a second fan is located on the inner wall of the enclosure at the air outlet, used to blow air from inside the enclosure to the outside; a refrigeration unit has a first feed end, a first discharge end, and a refrigeration section, the first feed end and the first discharge end respectively penetrate different side walls of the enclosure and extend to the outside of the enclosure; the refrigeration section is located inside the enclosure; wherein, the first feed end is used to introduce liquid nitrogen, the first discharge end is used to discharge nitrogen gas, and the refrigeration section is used to absorb heat and cool the air inside the enclosure.

[0007] Optionally, the refrigeration unit is an air-bath vaporizer, used to vaporize the liquid nitrogen introduced at the first feed end into nitrogen gas and discharge the nitrogen gas from the first discharge end.

[0008] Optionally, the interior of the enclosure is provided with a gas-liquid heat exchanger, which has a second inlet end, a second outlet end, and a heating section. The second inlet end and the second outlet end respectively penetrate different side walls of the enclosure and extend to the outside of the enclosure. The heating section is located inside the enclosure. The second inlet end is used to introduce steam, the second outlet end is used to discharge liquid, and the heating section is used to release heat to warm the air inside the enclosure.

[0009] Optionally, the cover has a first connecting pipe at the air inlet; a second connecting pipe is provided on the side wall of the first pipe, the other end of the second pipe passes through the side wall of the cover and extends to the top of the refrigeration unit; a first valve is provided inside the first pipe, the first valve is located inside the first pipe between the connection of the first pipe and the second pipe and the cover; a second valve is provided inside the second pipe.

[0010] Optionally, a third duct connected to the air outlet is provided on the side wall of the cover, and an insulation layer is provided on the outer wall of the third duct.

[0011] Optionally, the inner top of the enclosure is provided with a partition to divide the enclosure into a heating chamber and a cooling chamber; the gas-liquid heat exchanger is located inside the heating chamber, and the air-bath vaporizer is located inside the cooling chamber; wherein, the second pipe passes through the partition and extends into the interior of the cooling chamber; a fourth pipe is provided through the side wall of the partition, one end of the fourth pipe is located inside the heating chamber, and the other end is connected to the air outlet; a third fan is provided on the side wall of the partition and connected to the fourth pipe to deliver air from the heating chamber to the air outlet.

[0012] Optionally, an auxiliary electric heater is provided inside the heating chamber of the enclosure.

[0013] Optionally, two thermometers are provided on the side wall of the enclosure, one thermometer for measuring and displaying the temperature inside the heating chamber and the other thermometer for measuring and displaying the temperature inside the cooling chamber.

[0014] Optionally, the side walls of the enclosure are provided with access ports that connect to the heating chamber and the cooling chamber, and each access port is hinged with a sealing door.

[0015] Optionally, the air outlet includes a first air outlet and a second air outlet, with the first air outlet located above the second air outlet, and a second fan installed inside both the first and second air outlets.

[0016] The beneficial effects of this utility model are:

[0017] By constructing a enclosure with air inlets and outlets on different side walls, a first fan is installed at the air inlet and a second fan at the air outlet, allowing outside air to enter the enclosure through the first fan and then exit through the second fan. A refrigeration unit is then installed inside the enclosure, comprising a first feed end, a first discharge end, and a refrigeration section. The first feed end and the first discharge end penetrate the side walls of the enclosure and extend to the outside, while the refrigeration section is located inside the enclosure. The first feed end is used to introduce liquid nitrogen, which is frequently used in the factory. Then, it is vaporized and absorbs heat through the refrigeration unit. When the air inside the enclosure comes into contact with the refrigeration unit, it will transfer its own heat to the refrigeration unit. Since the liquid nitrogen absorbs heat during vaporization, it can absorb the transferred heat and discharge nitrogen gas from the first discharge end. In this process, the liquid nitrogen frequently used in the factory is utilized and vaporized. The vaporization of liquid nitrogen absorbs heat and can absorb and transport away the heat in the air, thereby achieving a cooling effect and avoiding the pipe freezing blockage that occurs when using 7°C chilled water pipes for refrigeration. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of an air conditioning unit that uses liquid nitrogen refrigeration as disclosed in this embodiment;

[0020] Figure 2 for Figure 1 A top-view structural diagram;

[0021] Figure 3 for Figure 1 The diagram shows the connection structure of the gas-liquid heat exchanger, baffle, first pipe, second pipe, third pipe, fourth pipe and third fan.

[0022] Figure 4 A schematic diagram showing the positions of the first feed end, the first discharge end, the second feed end, and the second discharge end on the cover.

[0023] Figure 5 This is a schematic diagram of the structure of the first and second air outlets on the cover.

[0024] Figure label:

[0025] 1-Cover body, 10-Air inlet, 11-Air outlet, 12-First fan, 13-Second fan, 14-Heating chamber, 15-Cooling chamber;

[0026] 2-Refrigeration unit, 20-First feed end, 21-First discharge end;

[0027] 3-Gas-liquid heat exchanger, 30-Second feed end, 31-Second discharge end;

[0028] 4-Partition;

[0029] 5 - First pipeline, 50 - First valve;

[0030] 6-Second pipeline, 60-Second valve;

[0031] 7-Third pipe, 70-Insulation layer;

[0032] 8-Fourth Pipeline;

[0033] 9-Third fan. Detailed Implementation

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0036] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0037] Example

[0038] Please see Figure 1-5As shown, this embodiment discloses an air conditioning unit using liquid nitrogen refrigeration, including a housing 1, a first fan 12, a second fan 13, and a refrigeration unit 2. Specifically, the housing 1 is placed on the ground, creating a space between the interior of the housing 1 and the ground. Air inlets 10 and air outlets 11 are respectively opened on opposite side walls of the housing 1. The air inlets 10 allow air from outside the housing 1 to enter the interior, while the air outlets 11 discharge air from inside the housing 1 to the outside. The first fan 12 is installed at the air inlet 10, and it creates negative pressure to draw air from outside the housing 1 into the interior. The second fan 13 is installed at the air outlet 11, and it also creates negative pressure to discharge air from inside the housing 1 to the outside. The refrigeration unit 2 is located inside the housing 1; in this embodiment, the refrigeration unit 2 is placed on the ground inside the housing 1. The refrigeration unit 2 has a first inlet end 20, a first outlet end 21, and a refrigeration section. The first inlet end 20 and the first outlet end 21 penetrate different side walls of the enclosure 1 and extend to the outside of the enclosure 1. The first inlet end 20 is used to introduce liquid nitrogen, and the first outlet end 21 is used to discharge the vaporized nitrogen gas. The refrigeration section absorbs heat from the hot air entering the enclosure 1, turning the hot air into cold air, which is then discharged from the air outlet 11, achieving a cooling effect.

[0039] Furthermore, the aforementioned refrigeration unit 2 is an air bath vaporizer, which is a device that heats liquid gas in a vaporizer / vaporizer until it vaporizes (becomes gas). In this embodiment, liquid nitrogen is introduced into the air bath vaporizer. During the process of liquid nitrogen vaporizing into gaseous nitrogen, heat absorption occurs. When hot air from outside the enclosure 1 enters the enclosure 1, the hot air passes through the air bath vaporizer, and the heat contained in the hot air is absorbed, thereby turning the hot air into cold air and ultimately achieving a cooling effect.

[0040] The aforementioned enclosure 1 is further equipped with a gas-liquid heat exchanger 3. Specifically, the gas-liquid heat exchanger 3 has a second inlet end 30, a second outlet end 31, and a heating section. The second inlet end 30 and the second outlet end 31 respectively penetrate the side wall of the enclosure 1 and extend to the outside of the enclosure 1. The second inlet end 30 is used to introduce steam, which is excess steam generated by a reduction furnace or boiler, etc., and can be recycled here. The second outlet end 31 is used to discharge liquefied liquid. That is, during the process of steam entering from the second inlet end 30 and being discharged as liquid from the second outlet end 31, it will exchange heat with the cold air entering the enclosure 1 in the heating section, thereby turning the cold air inside the enclosure 1 into hot air. During the liquefaction process of steam turning into liquid, heat will be released to the cold air inside the enclosure 1.

[0041] Furthermore, a first pipe 5 is provided at the location of the air inlet 10 on the aforementioned cover 1, and a second pipe 6 is provided on the side wall of the first pipe 5. The other end of the second pipe 6 passes through the side wall of the cover 1 and extends to the top of the refrigeration unit 2. It should be noted that the first pipe 5 is used to introduce air from outside the cover 1 into the interior of the heating chamber 14, while the second pipe 6 is used to introduce air from outside the cover 1 into the interior of the direct-cooling unit. In addition, a first valve 50 is provided inside the first pipe 5, and a second valve 60 is provided inside the second pipe 6. The first valve 50 is located inside the first pipe 5 between the connection point of the first pipe 5 and the second pipe 6 and the outer wall of the cover 1, so that when the first valve 50 is closed, the air from outside the cover 1 can directly enter the interior of the second pipe 6; when the air from outside the cover 1 needs to enter the interior of the heating chamber 14, the second valve 60 is closed and the first valve 50 is opened.

[0042] The side wall of the aforementioned enclosure 1 is provided with a third pipe 7 that communicates with the air outlet 11. The third pipe 7 is used to discharge hot air that has absorbed heat through liquid nitrogen vaporization, turning the hot air into cold air and discharging it through the third pipe 7 to achieve cooling. In addition, a heat insulation layer 70 is provided on the outer wall of the third pipe 7, which can provide a certain heat insulation effect when discharging hot or cold air.

[0043] The inner top of the aforementioned enclosure 1 is equipped with a partition 4, which divides the space between the enclosure 1 and the ground into a heating chamber 14 and a cooling chamber 15. The partition 4 reduces the space between the enclosure 1 and the ground, allowing the temperature in the heating chamber 14 or cooling chamber 15 to change more quickly, thus enabling the required hot / cold air to be provided rapidly. With the partition 4 installed on the inner top of the enclosure 1, the second pipe 6 needs to pass through the partition 4 and extend into the interior of the cooling chamber 15. The second pipe 6 is used to transfer air from outside the enclosure 1 to the interior of the cooling chamber 15 for cooling. It should be noted that no fan is installed inside the second pipe 6. Because a second fan 13 is installed at the air outlet 11, after the first valve 50 of the first pipe 5 is closed, air can enter from the first pipe 5 into the second pipe 6 and then into the cooling chamber 15 for cooling, and finally be discharged from the air outlet 11. In addition, a fourth pipe 8 is also provided through the side wall of the partition 4. Specifically, one end of the fourth pipe 8 is located inside the heating chamber 14, and the other end is connected to the air outlet 11. A third fan 9 is installed inside the fourth pipe 8. When the third fan 9 is running, it can draw hot air from the heating chamber 14 into the fourth pipe 8 and finally discharge it from the air outlet 11.

[0044] Furthermore, an auxiliary electric heater is installed inside the heating chamber 14 of the cover 1. The auxiliary electric heater can assist in the rapid heating of the air in the heating chamber 14, so that the required hot air can be provided quickly.

[0045] Furthermore, two thermometers are installed on the side wall of the enclosure 1. By observing the changes in the thermometers, the heating or cooling temperature can be determined more accurately.

[0046] The side walls of the aforementioned enclosure 1 are respectively provided with inspection ports that are connected to the heating chamber 14 and the cooling chamber 15, and each inspection port is hinged with a sealing door. That is, the opening of the inspection ports makes it convenient for staff to open the sealing door and inspect the equipment in the heating chamber 14 or the cooling chamber 15.

[0047] The air outlet 11 on the aforementioned cover 1 includes a first air outlet 11 and a second air outlet 11, wherein the first air outlet 11 is located above the second air outlet 11, and a second fan 13 is provided inside both the first air outlet 11 and the second air outlet 11. In the space formed by the cover 1 and the ground, when it is necessary to heat the air, the hot air inside the cover 1 will rise and can be quickly discharged through the first air outlet 11 to avoid the accumulation of hot air inside the cover 1; when it is necessary to cool the air 15, the cold air inside the cover 1 will sink and can be quickly discharged through the second air outlet 11 to avoid the accumulation of cold air inside the cover 1.

[0048] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air conditioning unit that uses liquid nitrogen refrigeration, characterized in that, include: The cover has air inlets and air outlets on different side walls; a first fan is located on the inner wall of the cover at the air inlet, used to blow air from outside the cover into the interior of the cover; a second fan is located on the inner wall of the cover at the air outlet, used to blow air from inside the cover to the outside of the cover. A refrigeration unit has a first inlet end, a first outlet end, and a refrigeration section. The first inlet end and the first outlet end respectively penetrate different side walls of the cover and extend to the outside of the cover. The refrigeration section is located inside the cover. The first inlet end is used to introduce liquid nitrogen, the first outlet end is used to discharge nitrogen gas, and the refrigeration section is used to absorb heat and cool the air inside the cover.

2. The air conditioning unit using liquid nitrogen refrigeration according to claim 1, characterized in that, The refrigeration unit is an air-bath vaporizer, used to vaporize the liquid nitrogen introduced at the first feed end into nitrogen gas and discharge the nitrogen gas from the first discharge end.

3. The air conditioning unit using liquid nitrogen refrigeration according to claim 2, characterized in that, The interior of the enclosure is equipped with a gas-liquid heat exchanger, which has a second inlet end, a second outlet end, and a heating section. The second inlet end and the second outlet end respectively penetrate different side walls of the enclosure and extend to the outside of the enclosure. The heating section is located inside the enclosure. The second inlet end is used to introduce steam, the second outlet end is used to discharge liquid, and the heating section is used to release heat to warm the air inside the enclosure.

4. The air conditioning unit using liquid nitrogen refrigeration according to claim 3, characterized in that, The cover is provided with a first pipe at the location of the air inlet; a second pipe is provided on the side wall of the first pipe, the other end of the second pipe passing through the side wall of the cover and extending to the top of the refrigeration unit; a first valve is provided inside the first pipe, the first valve being located inside the first pipe between the connection point of the first pipe and the second pipe and the cover; a second valve is provided inside the second pipe.

5. The air conditioning unit using liquid nitrogen refrigeration according to claim 1, characterized in that, The side wall of the cover is provided with a third pipe that communicates with the air outlet, and the outer wall of the third pipe is provided with a heat insulation layer.

6. The air conditioning unit using liquid nitrogen refrigeration according to claim 4, characterized in that, The inner top of the enclosure is provided with a partition to divide the enclosure into a heating chamber and a cooling chamber; the gas-liquid heat exchanger is located inside the heating chamber, and the air-bath vaporizer is located inside the cooling chamber; wherein, the second pipe passes through the partition and extends into the interior of the cooling chamber; a fourth pipe is provided through the side wall of the partition, one end of the fourth pipe is located inside the heating chamber, and the other end is connected to the air outlet; a third fan is provided on the side wall of the partition and is connected to the fourth pipe to transport air from the heating chamber to the air outlet.

7. The air conditioning unit using liquid nitrogen refrigeration according to claim 6, characterized in that, The enclosure is located inside the heating chamber and is equipped with an auxiliary electric heater.

8. The air conditioning unit using liquid nitrogen refrigeration according to claim 6, characterized in that, Two thermometers are provided on the side wall of the enclosure. One thermometer is used to measure and display the temperature inside the heating chamber, and the other thermometer is used to measure and display the temperature inside the cooling chamber.

9. The air conditioning unit using liquid nitrogen refrigeration according to claim 8, characterized in that, The side wall of the enclosure is provided with access ports that are connected to the heating chamber and the cooling chamber, and each access port is hinged with a sealing door.

10. The air conditioning unit using liquid nitrogen refrigeration according to claim 2 or 3, characterized in that, The air outlet includes a first air outlet and a second air outlet. The first air outlet is located above the second air outlet, and a second fan is provided inside both the first air outlet and the second air outlet.

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