A smart air conditioner for a single-cabinet base station

Abstract

This invention relates to the field of 2G / 3G / 4G / 5G base station air conditioning technology, and more particularly to a single-cabinet intelligent air conditioner for base stations. The single-cabinet intelligent air conditioner includes a refrigerant subsystem, ventilation components, electrical control components, and a metal cabinet. In the refrigerant subsystem, the exhaust port of the electric compressor is connected to the inlet end of the compressor exhaust pipe. The outlet end of the compressor exhaust pipe is connected to the inlet end of the condenser assembly. The outlet end of the condenser assembly is connected to the inlet end of the evaporation pipe. The outlet end of the evaporation pipe is connected to the inlet end of the expansion valve. The outlet end of the expansion valve is connected to the inlet end of the evaporator core. The outlet end of the evaporator core is connected to the inlet end of the compressor suction pipe. This invention, by setting up a refrigerant subsystem, ventilation components, electrical control components, and a metal cabinet, achieves the function of cooling or ventilating the base station cabinet, thereby reducing the air temperature inside the base station cabinet, cooling the hot air inside the base station cabinet, and ensuring that the communication or other electrical components inside the base station cabinet are at a suitable operating temperature.

Description

Technical Field

[0001] This invention relates to the field of 2G / 3G / 4G / 5G base station air conditioning technology, specifically to a smart air conditioner for a single-cabinet base station. Background Technology

[0002] Currently, for 2G / 3G / 4G / 5G base station air conditioning, each base station cabinet is equipped with a separate air conditioning system unit, which is typically installed on the front door of each cabinet. The main drawback of this current single-air conditioning assembly for base stations is:

[0003] 1. Insufficient cooling capacity;

[0004] 2. Fixed frequency control, not energy-efficient;

[0005] 3. In low-temperature environments, electric compressors, condenser fans, and blower motors will frequently start and stop, which will seriously affect the lifespan of the components. The working time is generally only 1 to 2 years.

[0006] 4. Unable to perform remote monitoring, alarm & reset, and diagnostic functions;

[0007] Therefore, a smart air conditioner for a single-cabinet base station is proposed to address the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide a smart air conditioner for a single-cabinet base station to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] As an optional solution of the single-cabinet base station intelligent air conditioner described in this invention, the single-cabinet base station intelligent air conditioner includes a refrigerant subsystem, ventilation components, electrical control components, and a metal cabinet. Its main components include the metal cabinet, electric compressor, compressor exhaust pipe, condenser assembly, condenser fan, condenser fan inlet hood, evaporation pipe, expansion valve, evaporator core, blower, blower inlet hood, compressor suction pipe, intelligent controller, wiring harness, pressure and temperature sensors, bypass ventilation door, servo motor, filter screen, evaporator temperature sensor, and condenser temperature sensor.

[0011] In the refrigerant subsystem, the discharge port of the electric compressor is connected to the inlet end of the compressor discharge pipe, the outlet end of the compressor discharge pipe is connected to the inlet end of the condenser assembly, the outlet end of the condenser assembly is connected to the inlet end of the evaporation pipeline, the outlet end of the evaporation pipeline is connected to the inlet end of the expansion valve, the outlet end of the expansion valve is connected to the inlet end of the evaporator core, the outlet end of the evaporator core is connected to the inlet end of the compressor suction pipe, and the outlet end of the compressor suction pipe is connected to the suction port of the electric compressor, thus completing one working cycle of the refrigerant subsystem, repeating continuously.

[0012] The blower and blower inlet hood of the ventilation components are respectively mounted on the metal cabinet, and the evaporator core is also mounted on the metal cabinet via the evaporator bracket. The metal cabinet cover has an air blowing port and an air intake port. The blower draws in hot air from the base station cabinet through the air intake port on the metal cabinet cover. After passing through the evaporator core, the hot air is cooled and then blows cold air out of the base station cabinet through the air blowing port on the metal cabinet cover to achieve the purpose of cooling the base station cabinet.

[0013] The condenser fan and condenser fan inlet hood of the ventilation components are respectively installed on the metal cabinet, and the condenser assembly is also installed on the metal cabinet. The back panel of the metal cabinet has an air inlet and an air outlet. The condenser fan draws in ambient air from the air inlet on the back panel of the metal cabinet, and after passing through the condenser assembly, it carries away the heat dissipation of the condenser assembly. Then, it exhausts the hot air to the outside of the metal cabinet from the air outlet on the back panel of the metal cabinet.

[0014] The intelligent controller in the electrical control component is connected to the electric compressor, condenser fan, blower, and various sensors via wiring harnesses. The intelligent controller has built-in software programs that achieve intelligent control by using feedback signals from various sensors and electrical components to regulate the speed of the electric compressor, condenser fan, and blower in the frequency converter cabinet.

[0015] As an optional solution of the single-cabinet base station intelligent air conditioner of the present invention, wherein: the single-cabinet base station intelligent air conditioner is an integrated type, and the electric compressor, condenser, condenser fan, evaporator core, blower and controller and other components are all arranged in a metal cabinet, and the metal frame contains an indoor unit evaporation chamber and an outdoor unit condensation chamber.

[0016] This intelligent air conditioner for base stations can be installed on either the front or the back of the base station cabinet, making installation convenient. Its advantages include stable and reliable installation, which is conducive to the stable operation of the intelligent air conditioner and improves the lifespan of the system and components. It also has advantages such as waterproof, dustproof, anti-theft, and noise reduction.

[0017] As an alternative solution for the single cabinet base station intelligent air conditioner described in the present invention, the evaporator core adopts a microchannel double parallel flow evaporator, the core thickness ranges from 24 to 48 mm, and the refrigeration performance > 2 Kw.

[0018] As an alternative solution for the single cabinet base station intelligent air conditioner described in the present invention, the expansion valve is optimized to use a mechanical expansion valve, or a capillary throttle valve can also be used to achieve the purpose of cost reduction.

[0019] As an alternative solution for the single cabinet base station intelligent air conditioner described in the present invention, the condenser assembly adopts a microchannel parallel flow condenser, the core thickness ranges from 12 to 32 mm, and it has the advantages of high efficiency and light weight.

[0020] As an alternative solution for the single cabinet base station intelligent air conditioner described in the present invention, in the condensation chamber of the metal cabinet, an exhaust bypass air door is provided, the exhaust bypass air door is connected to a servo motor, and the servo motor is controlled by an intelligent controller; when the winter temperature is relatively low, the base station air conditioner still needs to operate for refrigeration according to the heat load demand in the cabinet. When the condensation fan is at the lowest speed and the refrigerant high pressure is still very low under the working conditions, the bypass air door can be opened to reduce the air volume passing through the condenser, so that the system high pressure can be restored to the normal range. Its advantages are: avoiding the disadvantages of the existing base station household air conditioner frequently turning on and off the condensation fan or compressor, which causes impact on components, not only broadening the low temperature environment range for the stable operation of the base station air conditioner, but also being beneficial to improving the service life of the compressor and condenser, and having an energy-saving effect.

[0021] As an alternative solution for the single cabinet base station intelligent air conditioner described in the present invention, an evaporator chamber temperature sensor is arranged at the air inlet of the evaporation chamber of the cabinet air conditioner to monitor the heat load requirements in the base station cabinet and feed back the temperature data to the controller. The controller intelligently and variably controls the speeds of the electric compressor and the condensation fan according to the built-in program to accurately control the temperature in the base station cabinet.

[0022] As an alternative solution for the single cabinet base station intelligent air conditioner described in the present invention, a high-pressure temperature sensor is installed on the compressor exhaust pipe, and the controller controls the speed of the condensation fan according to the refrigerant high pressure frequency modulation.

[0023] As an alternative solution for the single cabinet base station intelligent air conditioner described in the present invention, the controller adopts a PID algorithm according to the temperature feedback from the evaporator chamber temperature sensor and the signal feedback of the electric compressor to automatically calculate the heat load of the cabinet and intelligently and variably control the speed of the electric compressor.

[0024] As an optional solution for the single-cabinet base station intelligent air conditioner described in this invention, the intelligent controller has a 485 communication interface and reserves remote monitoring, alarm & reset and diagnostic functions.

[0025] As an optional solution for the single-cabinet base station intelligent air conditioner described in this invention, it adopts a refrigerant pipeline that conforms to the refrigerant pipeline standards for automotive air conditioning, including a compressor exhaust pipe, a cold evaporation pipe, a compressor suction pipe, etc., which facilitates installation and maintenance, and at the same time, the refrigerant leakage is small.

[0026] As an optional solution for a single-cabinet base station intelligent air conditioner according to the present invention, the condenser fan adopts a brushless DC external rotor motor with a rated power range of 100-200W; the blower adopts a brushless DC external rotor motor with a rated power range of 20-60W; and the electric compressor adopts a rotary compressor with a displacement range of 10cc-20cc.

[0027] As an optional solution for the single-cabinet base station intelligent air conditioner described in this invention, the condenser fan inlet is equipped with a replaceable dustproof screen, which has the advantages of dustproof, insectproof and convenient maintenance.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] This invention achieves the function of cooling or ventilating the base station cabinet by setting up a refrigerant subsystem, ventilation components, electrical control components and metal cabinet; thereby reducing the air temperature inside the base station cabinet, cooling the hot air inside the base station cabinet, and keeping the communication or other electrical components inside the base station cabinet at a suitable operating temperature.

[0030] The refrigerant subsystem can ensure sufficient refrigerant flow by setting an electric compressor with appropriate displacement, thereby guaranteeing the cooling capacity; variable frequency control rotary electric compressors are preferred to achieve energy-saving effects.

[0031] The refrigerant subsystem ensures effective cooling of high-temperature, high-pressure refrigerant by using a condenser of appropriate size.

[0032] The refrigerant subsystem ensures the cooling effect of the cold base station cabinet by setting an evaporator of appropriate size;

[0033] The ventilation system is equipped with one condenser fan and one blower. Variable frequency motors are preferred to achieve energy saving and precise temperature control inside the cabinet.

[0034] The electrical control component realizes intelligent control by setting a controller with a built-in software program. Through the feedback signals of various sensors and electrical components, it adjusts the speeds of the blower, electric compressor, and condensing fan in the variable-frequency control cabinet, accurately controls the temperature inside the cabinet according to the heat load condition of the base station cabinet, and achieves intelligent refrigeration or ventilation. Brief Description of the Drawings

[0035] Figure 1 It is a front structural schematic diagram of the intelligent air conditioner for a single cabinet base station of the present invention;

[0036] Figure 2 It is a back structural schematic diagram of the intelligent air conditioner for a single cabinet base station of the present invention.

[0037] In the figure: 1. Metal frame; 2. Electric compressor; 3. Compressor exhaust pipe; 4. Condenser assembly; 5. Condensing fan; 6. Condensing fan air inlet cover; 7. Cold evaporation pipe; 8. Expansion valve; 9. Evaporator assembly; 10. Blower; 11. Blower air inlet cover; 12. Compressor suction pipe; 13. Controller; 14. Wiring harness; 15. Pressure and temperature sensor; 16. Side ventilation door; 17. Servo motor; 18. Filter screen; 19. Evaporation chamber temperature sensor; 20. Condensation chamber temperature sensor. Detailed Description of the Invention

[0038] Embodiment 1:

[0039] Please refer to Figure 1 and Figure 2 The present invention provides a technical solution:

[0040] An intelligent air conditioner for a single cabinet base station includes a refrigerant subsystem, a ventilation component, an electrical control component, and a metal cabinet 1;

[0041] The above-mentioned refrigerant subsystem includes an electric compressor 2 and a condenser assembly 4. The exhaust port of the electric compressor 2 is connected to the inlet end of the compressor exhaust pipe 3, the outlet end of the compressor exhaust pipe 3 is connected to the inlet end of the condenser assembly 4, the outlet end of the condenser assembly 4 is connected to the inlet end of the cold evaporation pipeline 7, the outlet end of the cold evaporation pipeline 7 is connected to the inlet end of the expansion valve 8, the outlet end of the expansion valve 8 is connected to the inlet end of the evaporator core 9, the outlet end of the evaporator core 9 is connected to the inlet end of the compressor suction pipe 12, and the outlet end of the compressor suction pipe 12 is connected to the suction port of the electric compressor 2, completing a working cycle of the refrigerant subsystem, which repeats indefinitely;

[0042] The aforementioned ventilation components include a blower 10 and a blower inlet hood 11, which are respectively mounted on the metal cabinet 1. The evaporator core 9 is also mounted on the metal cabinet 1 via an evaporator bracket. The cover plate of the metal cabinet 1 has an air blowing port and an air suction port. The blower 10 draws in hot air from the base station cabinet through the air suction port on the cover plate of the metal cabinet 1, and the hot air is cooled after passing through the evaporator core 9. The air blowing port on the cover plate of the metal cabinet 1 blows cold air into the base station cabinet to achieve the purpose of cooling the air temperature inside the base station cabinet.

[0043] The condenser fan 5 and condenser fan inlet 6 in the above-mentioned ventilation components are respectively installed on the metal cabinet 1. The condenser assembly 4 is also installed on the metal cabinet 1. The back panel of the metal cabinet 1 has an air inlet and an air outlet. The condenser fan 5 draws in ambient air from the air inlet on the back panel of the metal cabinet 1 and carries away the heat dissipation of the condenser assembly 4 after passing through the condenser assembly 4. The hot air is discharged to the outside of the metal cabinet 1 from the air outlet on the back panel of the metal cabinet 1. A filter screen 18 is also installed on the outside of the metal cabinet 1.

[0044] The aforementioned electrical control components include a controller 13, which is connected to the electric compressor 2, condenser fan 5, blower 10, and various sensors via wiring harness 14. The controller 13 has built-in software programs that achieve intelligent control of the speed of the electric compressor 2, condenser fan 5, and blower 10 in the frequency converter cabinet through feedback signals from various sensors and electrical components.

[0045] Example 2

[0046] This embodiment is an improvement made to Implementation 1. Please refer to [link / reference]. Figure 1 and Figure 2 Specifically, the aforementioned single-cabinet base station intelligent air conditioner is an integrated unit. The aforementioned electric compressor 2, condenser 4, condenser fan 5, evaporator core 9, blower 10, and controller 13 are all arranged in the metal cabinet 1. The metal frame 1 contains the indoor unit evaporation chamber and the outdoor unit condensation chamber. This base station intelligent air conditioner can be installed at the front or the back of the base station cabinet, making installation convenient. Its advantages are that the installation is stable and reliable, which is conducive to the stable operation of the base station intelligent air conditioner, improves the life of the system and components, and has the advantages of being waterproof, dustproof, theft-proof, and noise-reducing.

[0047] Example 3

[0048] This embodiment is an improvement made to Implementation 1. Please refer to [link / reference]. Figure 1 and Figure 2Specifically, the evaporator core 9 adopts a microchannel dual parallel flow evaporator with a core thickness ranging from 24 to 48 mm. The expansion valve 8 adopts a mechanical expansion valve or a capillary throttling valve to achieve cost reduction. The condenser assembly 4 adopts a microchannel parallel flow condenser with a core thickness ranging from 12 to 32 mm, which has the advantages of high performance and lightweight.

[0049] Example 4

[0050] This embodiment is an improvement upon the three implementation examples. Please refer to [link / reference]. Figure 1 and Figure 2 Specifically, the condenser chamber of the aforementioned metal cabinet 1 is equipped with an exhaust bypass ventilation door 16, which is connected to a servo motor 17. The servo motor 17 is controlled by a controller 13. When the winter temperature is low, the base station air conditioner still needs to operate for cooling according to the heat load demand inside the cabinet. Even when the condenser fan 5 is at its lowest speed and the refrigerant pressure is still very low, the bypass ventilation door can be opened to reduce the airflow through the condenser, thereby restoring the system pressure to the normal range. Its advantages are: avoiding the disadvantages of frequent switching of the condenser fan or compressor in existing base station household air conditioners, which causes impact on components; not only expanding the low-temperature environment range for stable operation of the base station air conditioner, but also improving the service life of the compressor and condenser, and having energy-saving effects.

[0051] Example 5

[0052] This embodiment is an improvement upon the four implementation examples. Please refer to [link / reference]. Figure 1 and Figure 2 Specifically, an evaporator temperature sensor 19 is installed at the air intake of the evaporator chamber of the aforementioned cabinet air conditioner to monitor the heat load inside the base station cabinet and feed the temperature data back to the controller 13. The controller 13 intelligently adjusts the speed of the electric compressor 2 and the condenser fan 5 according to the built-in program to accurately control the temperature inside the base station cabinet. A high-pressure temperature sensor 15 is installed on the exhaust pipe 3 of the aforementioned compressor. The controller 13 controls the speed of the condenser fan 5 according to the high-pressure frequency regulation of the refrigerant.

[0053] Example 6

[0054] This embodiment is an improvement upon the previous five implementations. Please refer to [link / reference]. Figure 1 and Figure 2 Specifically, the controller 13 has a built-in 485 communication interface and is reserved for remote monitoring, alarm & reset and diagnostic functions. It adopts refrigerant piping that meets the standards for automotive air conditioning refrigerant piping, including compressor exhaust pipe 3, cold steam pipe 7, compressor suction pipe 12, etc., which is convenient for installation and maintenance. At the same time, the refrigerant leakage is small.

[0055] Example 7

[0056] This embodiment is an improvement upon the previous six implementations. Please refer to [link / reference]. Figure 1 and Figure 2 Specifically, the aforementioned condenser fan 5 adopts a brushless DC external rotor motor with a rated power range of 100-200W, the aforementioned blower 10 adopts a brushless DC external rotor motor with a rated power range of 20-60W, the aforementioned electric compressor 2 adopts a rotary compressor with a displacement range of 10cc-20cc, and the aforementioned condenser fan inlet is equipped with a replaceable dust filter, which has the advantages of dust prevention, insect prevention and convenient maintenance.

[0057] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A smart air conditioner for a single-cabinet base station, characterized in that: Includes refrigerant subsystem, ventilation components, electrical control components and metal cabinet (1); The refrigerant subsystem includes an electric compressor (2) and a condenser assembly (4). The exhaust port of the electric compressor (2) is connected to the inlet end of the compressor exhaust pipe (3). The outlet end of the compressor exhaust pipe (3) is connected to the inlet end of the condenser assembly (4). The outlet end of the condenser assembly (4) is connected to the inlet end of the evaporation pipe (7). The outlet end of the evaporation pipe (7) is connected to the inlet end of the expansion valve (8). The outlet end of the expansion valve (8) is connected to the inlet end of the evaporator core (9). The outlet end of the evaporator core (9) is connected to the inlet end of the compressor suction pipe (12). The outlet end of the compressor suction pipe (12) is connected to the suction port of the electric compressor (2). The ventilation components include a blower (10) and a blower inlet hood (11). The blower (10) and the blower inlet hood (11) are respectively installed on the metal cabinet (1). The evaporator core (9) is also installed on the metal cabinet (1) through the evaporator bracket. The cover plate of the metal cabinet (1) has an air blowing port and an air suction port. The blower (10) draws in hot air from the base station cabinet through the air suction port on the cover plate of the metal cabinet (1) and the hot air is cooled after passing through the evaporator core (9). The air blowing port on the cover plate of the metal cabinet (1) blows cold air into the base station cabinet to achieve the purpose of cooling the air temperature inside the base station cabinet. The condenser fan (5) and condenser fan inlet hood (6) in the ventilation components are respectively installed on the metal cabinet (1). The condenser assembly (4) is also installed on the metal cabinet (1). The back panel of the metal cabinet (1) has an air inlet and an air outlet. The condenser fan (5) draws in ambient air from the air inlet on the back panel of the metal cabinet (1) and carries away the heat dissipation of the condenser assembly (4) after passing through the condenser assembly (4). It also discharges hot air to the outside of the metal cabinet (1) from the air outlet on the back panel of the metal cabinet (1). A filter screen (18) is also installed on the outside of the metal cabinet (1). The electrical control component includes a controller (13), which is connected to the electric compressor (2), condenser fan (5), blower (10) and various sensors via wiring harness (14).

2. The intelligent air conditioner for a single-cabinet base station according to claim 1, characterized in that: The single-cabinet base station smart air conditioner is an integrated unit. The electric compressor (2), condenser (4), condenser fan (5), evaporator core (9), blower (10) and controller (13) are all arranged in the metal cabinet (1). The metal frame (1) contains the indoor unit evaporation chamber and the outdoor unit condensation chamber.

3. The intelligent air conditioner for a single-cabinet base station according to claim 1, characterized in that: The evaporator core (9) adopts a microchannel dual parallel flow evaporator, and its core thickness ranges from 24 to 48 mm.

4. The intelligent air conditioner for a single-cabinet base station according to claim 1, characterized in that: The expansion valve (8) is either a mechanical expansion valve or a capillary throttle valve.

5. A smart air conditioner for a single-cabinet base station according to claim 1, characterized in that: The condenser assembly (4) adopts a microchannel parallel flow condenser with a core thickness ranging from 12 to 32 mm.

6. A smart air conditioner for a single-cabinet base station according to claim 1, characterized in that: The condensation chamber of the metal cabinet (1) is provided with an exhaust bypass ventilation door (16), which is connected to a servo motor (17), and the servo motor (17) is controlled by a controller (13).

7. A smart air conditioner for a single-cabinet base station according to claim 1, characterized in that: An evaporator temperature sensor (19) is installed at the air intake of the evaporator chamber of the cabinet air conditioner to monitor the heat load inside the base station cabinet and feed the temperature data back to the controller (13).

8. A smart air conditioner for a single-cabinet base station according to claim 1, characterized in that: A high-pressure temperature sensor (15) is installed on the compressor exhaust pipe (3), and the controller (13) controls the speed of the condenser fan (5) according to the high-pressure frequency regulation of the refrigerant.

9. A smart air conditioner for a single-cabinet base station according to claim 1, characterized in that: The controller (13) has a built-in 485 communication interface.

10. A smart air conditioner for a single-cabinet base station according to claim 1, characterized in that: The condenser fan (5) adopts a brushless DC external rotor motor with a rated power range of 100-200W; the blower (10) adopts a brushless DC external rotor motor with a rated power range of 20-60W; and the electric compressor (2) adopts a rotary compressor.

11. A smart air conditioner for a single-cabinet base station according to claim 1, characterized in that: The condenser fan inlet is equipped with a replaceable dust filter.

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