Air conditioning device

Abstract

The utility model discloses an air conditioning device which comprises a shell, a first refrigerating system and a second refrigerating system, the shell is provided with an air inlet side, the first refrigerating system comprises a first evaporator, the first evaporator comprises at least two first coil pipe assemblies, the first coil pipe assemblies are arranged on the air inlet side, and the second refrigerating system comprises a second evaporator. The second evaporator comprises at least two second coil pipe assemblies, the number of the second coil pipe assemblies is equal to that of the first coil pipe assemblies, the second coil pipe assemblies and the first coil pipe assemblies are in one-to-one correspondence, and the second coil pipe assemblies are arranged on the sides, opposite to the air inlet side, of the corresponding first coil pipe assemblies. The first coil pipe assembly and the second coil pipe assembly are arranged front and back, the situation that the left-right air outlet temperature is not uniform is reduced, when the refrigeration requirement is low, the first refrigeration system can precool return air in a fluorine pump natural cooling mode, and therefore when air enters the second refrigeration system, energy consumption of a compressor can be reduced, and the refrigeration efficiency is improved. The overall energy efficiency of the air conditioning device is improved, and the working efficiency of the air conditioning device is guaranteed.

Description

Technical Field

[0001] This application relates to the field of computer room air conditioning technology, specifically to an air conditioning device. Background Art

[0002] In-row air conditioning, also known as inter-row air conditioning or in-row refrigeration units, is a precision cooling system specifically designed for high heat density server racks. It is placed directly between the rows of server racks, dissipating heat directly from the heat source.

[0003] In the process of developing this application, the inventors discovered at least the following technical problems in the prior art:

[0004] Based on the current dual-coil system used in the inter-row air conditioning, when a single system is running, the hot return air drawn into the machine room by one system mixes with the cold air from the other system, resulting in uneven air outlet temperatures between the left and right systems. This reduces the overall energy efficiency of the air conditioning system and thus affects its working efficiency. Utility Model Content

[0005] In order to overcome the problems existing in the prior art, the main objective of this application is to provide an air conditioning device that can ensure uniform air outlet temperature to improve overall energy efficiency.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] An air conditioning unit, comprising:

[0008] The housing has an air inlet side;

[0009] A first refrigeration system, the first refrigeration system includes a first evaporator, the first evaporator includes at least two first coil assemblies, each of the first coil assemblies is respectively disposed on the air inlet side;

[0010] The second refrigeration system includes a second evaporator, which includes at least two second coil assemblies. The number of second coil assemblies is equal to that of the first coil assemblies and they correspond one-to-one. The second coil assemblies are disposed on the side of the corresponding first coil assembly that faces away from the air inlet side.

[0011] In some embodiments, the first coil assembly includes two first coils connected to each other, the two first coils being arranged in a V-shape;

[0012] The second coil assembly includes two interconnected second coils arranged in a V-shape.

[0013] In some embodiments, the included angle between the two first coils is α, where 60° < α < 180°;

[0014] The included angle between the two second coils is b, where 60° < b < 180°.

[0015] In some embodiments, the first coil and the second coil are respectively configured as flat tubes.

[0016] In some embodiments, the thickness of the first coil is set as D1, and the thickness of the second coil is set as D2, where D1 ≥ D2.

[0017] In some embodiments, the first refrigeration system further includes a first compressor, a first condenser, and a first electronic expansion valve. The first compressor, the first condenser, the first electronic expansion valve, and the first evaporator are connected in sequence through a first pipeline to form a first compressor refrigeration circuit.

[0018] In some embodiments, the first refrigeration system further includes a first valve and a first refrigerant pump connected in parallel to the first compressor refrigeration circuit. The two ends of the first valve are respectively connected to the inlet and outlet of the first compressor. The input end of the first refrigerant pump is connected to the first condenser, and the output end of the first refrigerant pump is connected to the first electronic expansion valve, so that the first evaporator, the first valve, the first condenser, the first refrigerant pump, and the first electronic expansion valve form a first refrigerant pump refrigeration circuit.

[0019] In some embodiments, the first valve is a one-way valve.

[0020] In some embodiments, the second refrigeration system further includes a second compressor, a second condenser, and a second electronic expansion valve. The second compressor, the second condenser, the second electronic expansion valve, and the second evaporator are sequentially connected through a second pipeline to form a second compressor refrigeration circuit.

[0021] In some embodiments, the second refrigeration system further includes a second valve and a second refrigerant pump connected in parallel to the second compressor refrigeration circuit. The two ends of the second valve are respectively connected to the inlet and outlet of the second compressor. The input end of the second refrigerant pump is connected to the second condenser, and the output end of the second refrigerant pump is connected to the second electronic expansion valve, so that the second evaporator, the second valve, the second condenser, the second refrigerant pump and the second electronic expansion valve form a second refrigerant pump refrigeration circuit.

[0022] Compared with the prior art, the air conditioning device provided in this application has at least the following beneficial effects:

[0023] The second coil assembly of this application is equal in number to the first coil assembly and corresponds one-to-one. The second coil assembly is set on the side of the corresponding first coil assembly facing away from the air inlet. By setting the first coil assembly of the first refrigeration system and the second coil assembly of the second refrigeration system one after the other, air will flow through the first coil assembly and the second coil assembly in sequence, reducing the unevenness of the left and right air outlet temperature. When the cooling demand is low, the first refrigeration system can pre-cool the return air through the refrigerant pump natural cooling mode, thereby reducing the energy consumption of the compressor when the air enters the second refrigeration system, improving the overall energy efficiency of the air conditioning unit, and ensuring the working efficiency of the air conditioning unit. Attached Figure Description

[0024] Figure 1 A schematic diagram of the first refrigeration cycle component of the air conditioning device provided in the embodiments of this application;

[0025] Figure 2 This is a partial structural schematic diagram of an air conditioning device provided in an embodiment of this application.

[0026] Figure label:

[0027] 1. First refrigeration system; 11. First compressor; 12. First condenser; 13. First electronic expansion valve; 14. First evaporator; 140. First coil assembly; 140a. First coil; 15. First valve; 16. First connecting pipe; 17. First refrigerant pump; 18. First check valve; 19. First ball valve;

[0028] 2. Second evaporator; 210. Second coil assembly; 210a. Second coil. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more, and the term "various types" refers to two or more; the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0032] Reference Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the first refrigeration cycle component of the air conditioning device provided in an embodiment of this application. Figure 2 This is a partial structural schematic diagram of an air conditioning device provided in an embodiment of this application. This embodiment discloses an air conditioning device including a housing, a fan, a first refrigeration system 1, and a second refrigeration system. The housing has an air inlet side and an air outlet side. The fan is disposed inside the housing to direct airflow from the air inlet side to the air outlet side. The first refrigeration system 1 and the second refrigeration system are independent of each other. The first refrigeration system 1 includes a first evaporator 14, which includes at least two first coil assemblies 140. Each first coil assembly 140 is disposed on the air inlet side and located at the air inlet end of the fan. The second refrigeration system includes a second evaporator 2, which includes at least two second coil assemblies 210. The number of second coil assemblies 210 is equal to and corresponds one-to-one with the number of first coil assemblies 140. The second coil assembly 210 is disposed on the side of the corresponding first coil assembly 140 facing away from the air inlet side and located at the air inlet end of the fan.

[0033] In this embodiment, the number of second coil assemblies 210 and first coil assemblies 140 are equal and correspond one-to-one. The second coil assembly 210 is disposed on the side of the corresponding first coil assembly 140 facing away from the air inlet side. By arranging the first coil assembly 140 of the first refrigeration system 1 and the second coil assembly 210 of the second refrigeration system one after the other, air will flow through the first coil assembly 140 and the second coil assembly 210 in sequence, reducing the unevenness of the left and right air outlet temperatures. When the cooling demand is low, the first refrigeration system 1 can pre-cool the return air through the refrigerant pump natural cooling mode, thereby reducing the compressor energy consumption when the air enters the second refrigeration system, improving the overall energy efficiency of the air conditioning unit, and ensuring the working efficiency of the air conditioning unit.

[0034] Reference Figure 2As shown, the first coil assembly 140 includes two interconnected first coils 140a, which are arranged in a generally V-shape. The second coil assembly 210 includes two interconnected second coils 210a, each second coil 210a being positioned directly behind the first coil 140a along a first direction, and also arranged in a generally V-shape. The first direction is... Figure 2 The X direction in the equation.

[0035] In this embodiment, the two first coils 140a and the two second coils 210a are arranged in a V-shape, which increases the heat exchange area of ​​the first evaporator 14 and the second evaporator 2, thereby improving the heat exchange efficiency of the first evaporator 14 and the second evaporator 2, and thus improving the working efficiency of the air conditioning unit. It can be understood that in other embodiments, the number of first coils 140a and second coils 210a can be set as needed, so that the first coils 140a and the second coils 210a are roughly W-shaped, N-shaped or other shapes.

[0036] In this embodiment, the included angle between the two first coils 140a is α, where 60° < α < 180°, and the included angle between the two second coils 210a is b, where 60° < b < 180°, so as to increase the heat exchange area while reducing the space occupied by the two first coils 140a and the two second coils 210a.

[0037] Reference Figure 2 As shown, the first coil 140a and the second coil 210a are respectively configured as flat tubes. Specifically, the first coil 140a and the second coil 210a are parallel flow aluminum flat tubes. The parallel flow aluminum flat tubes have lower coil air resistance, thereby improving the working efficiency of the first coil assembly 140 and the second coil assembly 210. Moreover, compared with the traditional copper tube finned evaporator, its air delivery is more uniform, thus improving the overall energy efficiency of the air conditioning unit.

[0038] In this embodiment, the thickness of the first coil 140a is set to D1, and the thickness of the second coil 210a is set to D2, where D1 > D2, in order to increase the heat exchange area and thus improve the cooling effect. It can be understood that in other embodiments, the thickness D1 of the first coil 140a can also be the same as the thickness D2 of the second coil 210a.

[0039] Reference Figure 1As shown, the first refrigeration system 1 further includes a first compressor 11, a first condenser 12, a first electronic expansion valve 13, a first valve 15, a first connecting pipe 16, and a first refrigerant pump 17. The output end of the first compressor 11 is connected to the first condenser 12 through a first pipe. The output end of the first condenser 12 is connected to the first electronic expansion valve 13 through a first pipe. The output end of the first electronic expansion valve 13 is connected to each of the first coil assemblies 140. The output ends of each of the first coil assemblies 140 are connected to the input end of the first compressor, forming a first compressor refrigeration circuit. The two ends of the first valve 15 are connected to the input end and the output end of the first compressor 11, respectively, so that each of the first coil assemblies 140 is connected to the first valve 15. The input end of the first fluorine pump 17 is connected to the first condenser 12, and the output end of the first fluorine pump 17 is connected to the first electronic expansion valve 13. The first fluorine pump 17 and the first connecting pipe 16 are arranged in parallel, so that the first evaporator 14, the first valve 15, the first condenser 12, the first fluorine pump 17 and the first electronic expansion valve 13 form the first fluorine pump refrigeration circuit.

[0040] In this embodiment, the first valve 15 is configured as a one-way valve to reduce the situation where refrigerant at the output end of the first compressor 11 flows back to the input end of the first compressor 11 through the first valve 15 during operation, causing a flow short circuit, thereby ensuring the safety and reliability of the air conditioning device. It can be understood that in other embodiments, the first valve 15 may also be a two-way valve.

[0041] In this embodiment, the first refrigeration system 1 further includes a first one-way valve 18, which is disposed on the first connecting pipe 16 to reduce the situation where refrigerant at the output end of the first refrigerant pump 17 flows back to the input end of the first refrigerant pump 17 during operation, causing a flow short circuit, thereby ensuring the safety and reliability of the air conditioning device.

[0042] In this embodiment, the first refrigeration system 1 further includes a plurality of first ball valves 19, which are respectively disposed in the first pipeline. By disposing of the plurality of first ball valves 19, the flow rate of refrigerant in the first pipeline is adjusted and the connection and disconnection of the first pipeline are controlled to ensure the stable operation of the air conditioning device.

[0043] In this embodiment, the first refrigeration system 1 further includes a liquid storage tank and a safety valve. The liquid storage tank and the safety valve are respectively located at the input end of the first fluorine pump 17, used to store liquid and protect the first fluorine pump 17 by adjusting the supply. The safety valve is used to adjust the pressure in the liquid storage tank to ensure that the liquid storage tank works normally.

[0044] The second refrigeration system also includes a second compressor, a second condenser, a second electronic expansion valve, a second valve, a second connecting pipe, and a second refrigerant pump. The output end of the second compressor is connected to the second condenser via a second pipe, and the output end of the second condenser is connected to the second electronic expansion valve via a second pipe. The second electronic expansion valve is connected to each of the second coil assemblies 210, and each of the second coil assemblies 210 is connected to the input end of the second compressor, forming a second compressor refrigeration circuit. The two ends of the second valve are connected to the input and output ends of the second compressor, respectively, connecting each of the second coil assemblies 210 to the second valve. The input end of the second refrigerant pump is connected to the second condenser, and the output end of the second refrigerant pump is connected to the second electronic expansion valve. The second refrigerant pump and the second connecting pipe are connected in parallel, forming a second refrigerant pump refrigeration circuit consisting of the second evaporator 2, the second valve, the second condenser, the second refrigerant pump, and the second electronic expansion valve. The schematic diagram of the second refrigeration system is the same as that of the first refrigeration system 1.

[0045] In this embodiment, the second valve is configured as a one-way valve to reduce the possibility of refrigerant flowing back from the output end of the second compressor to the input end of the second compressor during operation, thus preventing flow short circuit and ensuring the safety and reliability of the air conditioning unit. It is understood that in other embodiments, the second valve may also be a two-way valve.

[0046] In this embodiment, the second refrigeration system further includes a second one-way valve, which is disposed on the second connecting pipe to reduce the situation where refrigerant at the output end of the second refrigerant pump flows back to the input end of the second refrigerant pump during operation, causing a flow short circuit, thereby ensuring the safety and reliability of the air conditioning device.

[0047] In this embodiment, the second refrigeration system further includes multiple second ball valves, which are respectively installed in the second pipeline. By installing multiple second ball valves, the flow rate of refrigerant in the second pipeline is adjusted and the connection and disconnection of the second pipeline are controlled to ensure the stable operation of the air conditioning unit.

[0048] During operation, when the cooling demand is high, the first compressor 11 and the second compressor are turned on, and cooling is performed through the first compressor refrigeration circuit and the second compressor refrigeration circuit to meet the cooling demand; when the cooling demand is low, the first compressor 11 is turned off, and the first refrigerant pump 17 is turned on, and the return air is pre-cooled through the natural cooling mode of the first refrigerant pump refrigeration circuit to meet the cooling demand; when the cooling demand continues to decrease, only a single system is turned on, for example, only the first compressor refrigeration circuit or only the second compressor refrigeration circuit is used for cooling.

[0049] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioning device, characterized in that, include: The housing has an air inlet side; A first refrigeration system, the first refrigeration system includes a first evaporator, the first evaporator includes at least two first coil assemblies, each of the first coil assemblies is respectively disposed on the air inlet side; The second refrigeration system includes a second evaporator, which includes at least two second coil assemblies. The number of second coil assemblies is equal to that of the first coil assemblies and they correspond one-to-one. The second coil assemblies are disposed on the side of the corresponding first coil assembly that faces away from the air inlet side.

2. The air conditioning device according to claim 1, characterized in that, The first coil assembly includes two first coils connected to each other, and the two first coils are arranged in a V-shape; The second coil assembly includes two interconnected second coils arranged in a V-shape.

3. The air conditioning device according to claim 2, characterized in that, The included angle between the two first coils is α, where 60° < α < 180°; The included angle between the two second coils is b, where 60° < b < 180°.

4. The air conditioning device according to claim 2, characterized in that, The first coil and the second coil are both configured as flat tubes.

5. The air conditioning device according to claim 1, characterized in that, The thickness of the first coil is set as D1, and the thickness of the second coil is set as D2, where D1 ≥ D2.

6. The air conditioning device according to claim 1, characterized in that, The first refrigeration system further includes a first compressor, a first condenser, and a first electronic expansion valve. The first compressor, the first condenser, the first electronic expansion valve, and the first evaporator are connected in sequence through a first pipeline to form a first compressor refrigeration circuit.

7. The air conditioning device according to claim 6, characterized in that, The first refrigeration system further includes a first valve and a first refrigerant pump connected in parallel to the first compressor refrigeration circuit. The two ends of the first valve are respectively connected to the input end and the output end of the first compressor. The input end of the first refrigerant pump is connected to the first condenser, and the output end of the first refrigerant pump is connected to the first electronic expansion valve, so that the first evaporator, the first valve, the first condenser, the first refrigerant pump and the first electronic expansion valve form a first refrigerant pump refrigeration circuit.

8. The air conditioning device according to claim 7, characterized in that, The first valve is a check valve.

9. The air conditioning device according to claim 1, characterized in that, The second refrigeration system also includes a second compressor, a second condenser, and a second electronic expansion valve. The second compressor, the second condenser, the second electronic expansion valve, and the second evaporator are connected in sequence through a second pipeline to form a second compressor refrigeration circuit.

10. The air conditioning device according to claim 9, characterized in that, The second refrigeration system further includes a second valve and a second refrigerant pump connected in parallel to the second compressor refrigeration circuit. The two ends of the second valve are respectively connected to the input end and the output end of the second compressor. The input end of the second refrigerant pump is connected to the second condenser, and the output end of the second refrigerant pump is connected to the second electronic expansion valve, so that the second evaporator, the second valve, the second condenser, the second refrigerant pump and the second electronic expansion valve form a second refrigerant pump refrigeration circuit.

Images