CN212436207U - Machine room and 48V direct current power supply refrigeration system for base station - Google Patents
Machine room and 48V direct current power supply refrigeration system for base station Download PDFInfo
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- CN212436207U CN212436207U CN202021727492.1U CN202021727492U CN212436207U CN 212436207 U CN212436207 U CN 212436207U CN 202021727492 U CN202021727492 U CN 202021727492U CN 212436207 U CN212436207 U CN 212436207U
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Abstract
The utility model relates to a 48V direct current supply refrigeration system for machine rooms and base stations, wherein an air-cooled heat pipe backboard air-conditioning indoor and outdoor machine is a 48V direct current fan, and the cold energy stored by a phase change energy storage air conditioner is transmitted to indoor cooling through the 48V direct current fan; when commercial power is available and the outdoor temperature is low, the air-cooled heat pipe backboard air conditioner can provide enough cooling capacity when the indoor unit and the outdoor unit of the air conditioner run, and the machine room air conditioner does not run; when the outdoor temperature is high, the indoor and outdoor units of the air-cooled heat pipe backboard air conditioner cannot provide enough cooling capacity, and the machine room air conditioner operates and provides cooling capacity required by the machine room together with the heat pipe backboard air conditioner; in an emergency power supply mode, when the indoor temperature is higher than 55 ℃ or 45 ℃ and the outdoor temperature is lower than 50 ℃ or 40 ℃, controlling the air-cooled heat pipe back plate air conditioner to refrigerate, and when the outdoor temperature is higher than 50 ℃ or 40 ℃, controlling the phase change energy storage air conditioner to start to refrigerate; the requirement of power failure emergency refrigeration is met, the temperature of the machine room is controlled to be 55 ℃ or even below 45 ℃, and emergency refrigeration can be carried out for 4 hours.
Description
Technical Field
The utility model relates to an air temperature regulation control technical field especially relates to a computer lab and 48V DC supply's for basic station refrigerating system.
Background
The growth rate of the Chinese machine room is far beyond expectation, and the proportion of energy consumption of machine room equipment and energy consumption occupied by an environment control system (an air conditioning system) is quite large. In the 5G networking process, a machine room (macro station) occupies a very important position, and once the power of the 5G machine room and a base station is cut off:
1) the air conditioner, the lighting equipment and other equipment adopt 380V/220V alternating current to directly supply power, and are firstly powered off;
2) the base station transmission equipment and the main equipment (BBU, AAU) utilize the electric energy stored by the storage battery to supply power through UPS emergency:
in general, the emergency power supply time of the UPS is 15 minutes to 4 hours; 48V direct current is adopted for power supply; and the primary power-off mode and the secondary power-off mode are adopted for power-off management.
In the 5G networking process, a machine room (macro station) occupies a very important position, and once the machine room is powered off, serious consequences can be caused, such as: if the transmission equipment is powered off, the transmission looped network is affected, transmission interruption of base stations in most areas is caused, and more serious communication faults are caused.
When the machine room (base station) is powered off, the power supply for the air conditioner is stopped firstly, and 48V emergency power supply is only provided for the transmission and main equipment (server, BBU and AAU) of the machine room, at the moment, the indoor temperature of the machine room is increased sharply due to the stop work of the air conditioner refrigeration equipment in the machine room, once the upper limit of the limit temperature (generally the maximum temperature is 55 ℃) is exceeded, the transmission equipment and the main equipment (server, BBU and AAU) in the machine room are shut down, and the communication is interrupted in a large area.
Therefore, whether the emergency refrigeration of the transmission equipment and the main equipment in the machine room can be solved under the condition of machine room power failure and only 48V direct current power supply becomes a serious bottleneck in the 5G communication popularization process.
SUMMERY OF THE UTILITY MODEL
Aiming at the existing problems and defects, the utility model provides a 48V direct current power supply refrigeration system for machine rooms and base stations, which can still use the air-cooled heat pipe back plate air conditioner and the emergency refrigeration of the phase change energy storage air conditioner when only 48V direct current UPS is used for power supply; when commercial power is supplied to the machine room, the air-cooled air conditioner can be linked with the machine room air-cooled air conditioner, cabinet-level cooling and energy saving are realized, the temperature of the machine room (base station) is controlled to be 28 ℃ or even below 25 ℃, the startup and shutdown times of the machine room air conditioner are reduced, the startup and shutdown times of a compressor are reduced, the service time and the frequent startup of the air conditioner are reduced, and the purposes of energy saving and consumption reduction are achieved.
In order to achieve the purpose, the utility model provides a 48V direct current power supply refrigeration system for machine rooms and base stations, which comprises a temperature acquisition module, an air-cooled heat pipe backboard air conditioner, a phase change energy storage air conditioner, a power supply module and a main control module;
the temperature acquisition module acquires indoor and outdoor temperatures;
the indoor unit and the outdoor unit of the air-cooled heat pipe backboard air-conditioning unit are all 48V direct current fans;
the cold energy stored by the phase-change energy-storage air conditioner is transferred to the indoor for cooling through a 48V direct current fan;
the power supply module converts commercial power into 48V direct current to provide normal power supply for the refrigeration system; when the commercial power is cut off, the UPS is switched to be used for providing emergency 48V direct current power supply for the refrigerating system;
the main control module controls the air-cooled heat pipe back plate air conditioner to refrigerate when the indoor temperature is higher than a first threshold value t1 ℃ and the outdoor temperature is not higher than (t1-5) DEG C under a normal power supply mode according to the collected indoor and outdoor temperatures, and controls the phase change energy storage air conditioner or the machine room air conditioner to refrigerate when the outdoor temperature is higher than (t1-5) DEG C; in an emergency power supply mode, when the indoor temperature is higher than a second threshold value t2 ℃ and the outdoor temperature is not higher than (t2-5) DEG C, controlling the air-cooled heat pipe back plate air conditioner to refrigerate, and when the outdoor temperature is higher than (t2-5) DEG C, controlling the phase change energy storage air conditioner to start to refrigerate; t2> t 1.
Further, the machine room and the base station are 5G machine rooms and base stations, and the first threshold t1 is 22-25 ℃; the second threshold t2 is 45-55 ℃.
Furthermore, the refrigerant in the air-cooled heat pipe back plate air-conditioning indoor unit absorbs heat and is converted into a gaseous refrigerant, the gaseous refrigerant enters the air-cooled heat pipe back plate air-conditioning outdoor unit, the gaseous refrigerant is converted into a liquid refrigerant after being cooled, and the liquid refrigerant returns to the air-cooled heat pipe back plate air-conditioning indoor unit.
Further, the air-cooled heat pipe back plate air-conditioning outdoor unit is higher than the air-cooled heat pipe back plate air-conditioning indoor unit, and the liquid refrigerant returns to the air-cooled heat pipe back plate air-conditioning indoor unit through gravity;
or the air-cooled heat pipe back plate air-conditioning outdoor unit is not higher than the air-cooled heat pipe back plate air-conditioning indoor unit, and the liquid refrigerant returns to the air-cooled heat pipe back plate air-conditioning indoor unit under the action of the liquid pump.
Furthermore, two ends of the air-cooled heat pipe backboard air-conditioning indoor unit are respectively connected to a refrigerant pipe through a hose, the refrigerant pipes on two sides are connected to the air-cooled heat pipe backboard air-conditioning outdoor unit, the refrigerant pipes on two sides are respectively provided with a filling valve for filling refrigerant and a valve for controlling the flow of the refrigerant, and the liquid refrigerant is observed through a liquid sight lens arranged on the air-cooled heat pipe backboard air-conditioning indoor unit.
Furthermore, the air-cooled heat pipe back plate air conditioner adopts a dual-system redundant structure and comprises two groups of heat exchangers which are independently arranged, and each group of heat exchangers can independently provide the cooling capacity required by the whole refrigeration air-conditioning system.
Further, the main control module automatically enters a normal power supply mode after being started, when the power supply module is switched to emergency power supply, a switching signal is sent to the main control module, and the main control module enters the emergency power supply mode;
the main control module comprises a first comparison unit, a second comparison unit, a switching unit and a logic output unit; the switching unit switches the comparison threshold values of the first comparison unit and the second comparison unit; the first comparison unit compares the indoor temperature with a threshold value, if the indoor temperature exceeds the threshold value, the indoor temperature is output as a high level, a first control signal is output, and the air-cooled heat pipe backboard air conditioner is controlled to refrigerate; the second comparison unit compares the outdoor temperature with a threshold value, and outputs a high level if the outdoor temperature exceeds the threshold value; and the logic output unit takes the output phase of the first comparison unit and the output phase of the second comparison unit as a second control signal to control the air-cooled heat pipe backboard to perform air conditioning refrigeration.
Further, the switching unit is a magnetic latching relay and comprises two switches, wherein a normally closed contact of the first switch is connected to a voltage reference corresponding to a first threshold t1 ℃, and a normally open contact of the first switch is connected to a voltage reference corresponding to a second threshold t2 ℃; the normally closed contact of the second switch is connected to the voltage reference corresponding to the first threshold (t1-5) DEG C, and the normally open contact is connected to the voltage reference corresponding to the second threshold (t2-5) DEG C.
Furthermore, refrigeration can be started when the temperature difference between the indoor unit and the outdoor unit of the air-cooled heat pipe backboard air-conditioner is not less than 5 ℃; the phase change energy storage air conditioner is an independent refrigeration device.
The above technical scheme of the utility model has following profitable technological effect:
(1) when power is off in a machine room and a base station, only 48V direct-current UPS supplies power, an emergency refrigeration system of an air-cooled heat pipe backboard air conditioner and a phase change energy storage air conditioner is used, 48V direct-current UPS supplies power to operate indoor and outdoor fans of the air-cooled heat pipe backboard air conditioner, the cold energy is provided for cooling indoor equipment, and the breakdown of main equipment (a server, a BBU (base band unit) and an AAU (active area unit)) is avoided; the cold energy stored by the phase change energy storage air conditioner is also transferred to indoor equipment for cooling through a 48V direct current fan, the requirement of power failure emergency refrigeration is met, the temperature of a machine room (base station) is controlled to be 55 ℃ or even below 45 ℃, and emergency refrigeration can be carried out for 4 hours.
(2) When the machine room (base station) is supplied with commercial power, an air-cooled heat pipe backboard air conditioner is adopted for refrigeration, and when the air-cooled heat pipe backboard air conditioner cannot provide enough cold energy, the machine room air conditioner using the commercial power is controlled to supply power; the air-cooled heat pipe back plate air conditioner is linked with the machine room air conditioner, so that the machine cabinet-level low-power-consumption cooling is realized, the temperature of a machine room (base station) is controlled to be 28 ℃ or even below 25 ℃, the on-off times of the machine room air conditioner and the on-off times of a compressor are reduced, the service time and the frequent opening of the air conditioner are reduced, and the purposes of saving energy and reducing consumption are achieved.
(3) The air-cooled heat pipe back plate air conditioner can completely meet the refrigeration requirement when the outdoor temperature is below 35 ℃, can ensure the emergency refrigeration requirement under most climatic conditions, and can solve the emergency refrigeration problem under the condition of power failure of a machine room (base station) in about 85-95% of the whole year; the emergency refrigeration problem under the condition of power failure of a machine room (base station) in 100% of the time all the year can be realized by matching with a phase-change refrigeration air conditioner.
(4) The utility model discloses a host system can adopt controller or comparing unit, switching unit, logic output unit to realize, simple structure, and the reliability is high.
Drawings
FIG. 1 is a diagram of an emergency refrigeration system using an air-cooled heat pipe backplane air conditioner and a phase change energy storage air conditioner when a 48V DC UPS is used for supplying power when a machine room and a base station have power failure;
FIG. 2 is a schematic diagram of a refrigerant cycle of an air-cooled heat pipe back plate air conditioner;
FIG. 3 is a schematic circuit diagram of a refrigeration system;
FIG. 4 is a schematic diagram of the circuit composition of the comparison unit, the switching unit and the logic output;
in the figure, 1 is an air-cooled heat pipe back plate air conditioner outdoor unit; 2 is a fluorine pump; 3 is a liquid sight glass; 4 is a valve; 5 is a fill valve; 6 is a hose; 7 is an air-cooled heat pipe back plate air-conditioning indoor unit; 8 is a hose; 9 is a fill valve; 10 is a valve; 11, machine room air conditioning; 12 phase change energy storage air conditioner; 13 equipment cabinet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-2, the refrigeration system powered by 48V dc for machine room and base station includes a temperature acquisition module, an air-cooled heat pipe back plate air conditioner, a phase change energy storage air conditioner, a power supply module and a main control module;
the temperature acquisition module acquires indoor and outdoor temperatures and sends the indoor and outdoor temperatures to the main control module. The temperature acquisition module acquires indoor and outdoor temperatures, and the indoor and outdoor temperatures are converted into voltage signals through the current-voltage conversion unit respectively, filtered and then sent to the main control module.
The indoor and outdoor units of the air-cooled heat pipe back plate air conditioner are 48V direct current fans; the cold energy stored by the phase-change energy-storage air conditioner is transferred to the indoor for cooling through a 48V direct current fan; the air-cooled heat pipe back plate air conditioner and the phase change energy storage air conditioner realize the adoption of 48V direct current power supply, and can be directly switched to the 48V direct current power supply provided by the UPS in emergency.
The power supply module converts commercial power into 48V direct current to provide normal power supply for the refrigeration system; on the other hand, when the commercial power is cut off, the commercial power is switched to the UPS to provide emergency power supply for the refrigeration system; and sending a switching signal to the main control module when the UPS is switched to supply power.
The main control module controls the air-cooled heat pipe back plate air conditioner to refrigerate when the indoor temperature is higher than a first threshold value t1 ℃ and the outdoor temperature is not higher than (t1-5) DEG C under a normal power supply mode according to the collected indoor and outdoor temperatures, and controls the phase change energy storage air conditioner or the machine room air conditioner to refrigerate when the outdoor temperature is higher than (t1-5) DEG C; in an emergency power supply mode, when the indoor temperature is higher than a second threshold value t2 ℃ and the outdoor temperature is not higher than (t2-5) DEG C, the air-cooled heat pipe back plate air conditioner is controlled to refrigerate, and when the outdoor temperature is higher than (t2-5) DEG C, the phase change energy storage air conditioner is controlled to be started to refrigerate.
As shown in figure 1, when a machine room and a base station have power failure and only 48V direct current UPS supplies power, an emergency refrigeration system consisting of an air-cooled heat pipe back plate air conditioner and a phase change energy storage air conditioner is used. The system comprises an air-cooled heat pipe backboard air conditioner outdoor unit 1, a machine room air conditioner 11, an air-cooled heat pipe backboard air conditioner indoor unit 7 and a phase change energy storage air conditioner 12, wherein when only a 48V direct current UPS supplies power when a machine room and a base station are powered off, an emergency refrigeration system consisting of the air-cooled heat pipe backboard air conditioner and the phase change energy storage air conditioner is used for cooling a machine room equipment cabinet 13.
When commercial power is available, when the outdoor temperature is low, the air-cooled heat pipe backboard air conditioner indoor and outdoor 7 machines operate to provide enough cooling capacity, and the machine room air conditioner 11 does not operate; when the outdoor temperature is high, the indoor and outdoor units of the air-cooled heat pipe backboard air conditioner cannot provide enough cooling capacity, and at this time, the machine room air conditioner 11 operates and provides the cooling capacity required by the machine room by operating together with the heat pipe backboard air conditioner; the machine room air conditioner 11 supplies power to the commercial power.
When only 48V direct current UPS supplies power, the air cooling heat pipe backboard air conditioning outdoor unit 1 and the air cooling heat pipe backboard air conditioning indoor unit 7 both use 48V direct current UPS to supply power to operate an indoor and outdoor fan, provide cold energy for cooling the indoor equipment cabinet 13, and the cold energy stored by the phase change energy storage air conditioner 12 can also be transmitted to the indoor equipment cabinet 13 through the 48V direct current fan to cool. The air-cooled heat pipe back plate air-conditioning indoor unit 7 is arranged on the rear door of the cabinet and is close to a heat source, and the efficiency is high. The phase change energy storage air conditioner 12 is arranged in the cabinet row, and can efficiently transmit cold energy to the cabinet nearby.
The emergency refrigeration system combining the air-cooled heat pipe back plate air conditioner and the phase change energy storage air conditioner is divided into two different working conditions of power failure and power outage: when the machine room and the base station are powered off, the emergency refrigeration of an air-cooled heat pipe back plate air conditioner and a phase change energy storage air conditioner can be realized, and the temperature of the machine room (the base station) is controlled to be 55 ℃ or even below 45 ℃; when commercial power is supplied to a machine room (base station), the machine room (base station) can be linked with a machine room air conditioner to realize cabinet-level low-power-consumption cooling, the temperature of the machine room (base station) is controlled to be 28 ℃ or even below 25 ℃, the on-off times of the machine room air conditioner and the on-off times of a compressor are reduced, the service time and the frequent opening of the air conditioner are reduced, and the purposes of saving energy and reducing consumption are achieved.
The air-cooled heat pipe back plate air conditioner indoor unit adopts a back plate type evaporator and is integrated with the cabinet, so that cabinet-level low-power-consumption cooling is realized, and the efficiency is higher; the heat pipe back plate evaporator is close to a heat source of the cabinet equipment, so that the return air temperature is high, the heat transfer temperature difference is large, and the heat pipe back plate evaporator is more efficient; under the emergency condition of power failure, the air inlet temperature of equipment needs to be controlled below 55 ℃ (preferably below 45 ℃), the refrigeration requirement can be completely met when the outdoor temperature is below 35 ℃ by adopting the heat pipe back plate, the emergency refrigeration requirement under most climatic conditions can be ensured, and the emergency refrigeration problem under the condition of power failure of a machine room (base station) in about 85-95% of the whole year can be solved; the emergency refrigeration problem under the condition of power failure of a machine room (base station) in 100% of the time all the year can be realized by matching with a phase-change refrigeration air conditioner.
As shown in fig. 2, when the machine room and the base station are powered off and only 48V dc UPS is used for supplying power, both the air-cooled heat pipe backplane air conditioning outdoor unit 1 and the air-cooled heat pipe backplane air conditioning indoor unit 7 are continuously operated by using the 48V dc UPS for continuously transferring indoor heat to the outside.
The refrigerant in the air-cooled heat pipe back plate air-conditioning indoor unit 7 absorbs heat and is converted into a gaseous refrigerant, the gaseous refrigerant enters the air-cooled heat pipe back plate air-conditioning outdoor unit 1, is converted into a liquid refrigerant after being cooled, and returns to the air-cooled heat pipe back plate air-conditioning indoor unit 7. As shown in fig. 2, two ends of an air-cooled heat pipe backboard air-conditioning indoor unit 7 are connected to refrigerant pipes through hoses 6 and 8 respectively, the refrigerant pipes on two sides are connected to an air-cooled heat pipe backboard air-conditioning outdoor unit 1, the refrigerant pipes on two sides are provided with filling valves 5 and 9 for filling refrigerants and valves 4 and 10 for controlling the flow of the refrigerants, and a liquid refrigerant is arranged on the air-cooled heat pipe backboard air-conditioning indoor unit through a liquid viewing mirror 3 to observe the liquid level of the refrigerants, so that whether the refrigerants need to be added or not can be judged.
The air-cooled heat pipe back plate air conditioning outdoor unit 1 can be higher than the air-cooled heat pipe back plate air conditioning indoor unit 7, the liquid refrigerant returns to the air-cooled heat pipe back plate air conditioning indoor unit 7 through gravity, and an air pipe is higher than a liquid pipe. The air-cooled heat pipe back plate air conditioner can be provided with the fluorine pump 2, the outdoor unit does not need to be higher than the indoor unit, and the installation is better and flexible. If the fluorine pump 2 is not installed, the refrigerant flow is completely driven by the gravity of the refrigerant, the air-cooled heat pipe back plate air-conditioning indoor unit 7 flows to the air-cooled heat pipe back plate air-conditioning outdoor unit 1 by the action of the gravity and is cooled into a liquid refrigerant by outdoor air, and the liquid refrigerant flows to the air-cooled heat pipe back plate air-conditioning indoor unit 7 by the action of the gravity, so that the self-adaptive circulation of a refrigerant system is completed, and the energy is saved. The choice of whether to install the fluorine pump 2 can be made according to the actual situation at the site.
The heat pipe backboard outdoor unit adopts an air cooling mode, and can be widely applied to all machine rooms and base stations without chilled water.
The phase change energy storage air conditioner is independent equipment, can occupy the whole cabinet, also can only occupy one part of the cabinet. The phase change energy storage air conditioner can store cold within 8760 hours all the year around, can use an air conditioner compressor to store cold, can also use a natural cold source to store cold, and only needs to cool when needed (for example, the indoor temperature is more than 25 ℃ under the energy-saving working condition, the indoor temperature is more than 55 ℃ under the emergency refrigeration working condition, and the indoor and outdoor temperature difference is less than 5 ℃).
The air-cooled heat pipe back plate air-conditioning system adopts dual-system redundancy and comprises two groups of heat exchangers which are independently arranged, each group of heat exchangers can independently provide the cooling capacity required by the whole refrigeration air-conditioning system, and the two groups of heat exchangers which are independently arranged can realize 100% redundancy of the whole refrigeration air-conditioning system.
When the machine room and the base station are powered off, only 48V direct-current UPS supplies power, the emergency refrigeration system of the air-cooled heat pipe backboard air conditioner and the phase change energy storage air conditioner is used as emergency refrigeration, when the machine room (base station) only supplies power with 48V direct-current UPS, the emergency refrigeration of the machine room (base station) can be maintained for 4 hours, and the temperature in the machine room (base station) can be maintained at 55 ℃ or even below 45 ℃; when the machine room (base station) is supplied with commercial power, the temperature in the machine room (base station) can be controlled to be 28 ℃ or even below 25 ℃ with low power consumption. When the commercial power is available, when the outdoor temperature is low, the air-cooled heat pipe backboard air-conditioning indoor and outdoor units operate to provide enough cooling capacity, the machine room air-conditioning does not operate, when the outdoor temperature is high, the air-cooled heat pipe backboard air-conditioning indoor and outdoor units cannot provide enough cooling capacity, and the machine room air-conditioning starts to operate at the moment and provides the required cooling capacity together with the heat pipe backboard air-conditioning. Most of the time, the air-cooled heat pipe back plate air conditioning system which is more energy-saving operates, so that the operation time of the air conditioner in the machine room is reduced, and the equipment in the machine room can operate for a long time with low power consumption.
The air-cooled heat pipe back plate air conditioner indoor unit adopts a back plate type evaporator and is integrated with the cabinet, so that cabinet-level low-power-consumption cooling is realized, and the efficiency is higher; the heat pipe back plate evaporator is close to a heat source of the cabinet equipment, so that the return air temperature is high, the heat transfer temperature difference is large, and the heat pipe back plate evaporator is more efficient; under the emergency condition of power failure, the air inlet temperature of equipment needs to be controlled below 55 ℃ (better below 45 ℃), the refrigeration can be started when the temperature difference of an indoor unit and an outdoor unit of the air-cooled heat pipe backboard air conditioner is not less than 5 ℃, the refrigeration requirement can be completely met when the outdoor temperature is below 35 ℃ by adopting the air-cooled heat pipe backboard air conditioner, the emergency refrigeration requirement under most climatic conditions can be ensured, and the emergency refrigeration problem under the power failure condition of a machine room (base station) in about 85-95% of the whole year can be solved; the emergency refrigeration problem under the condition of power failure of a machine room (base station) in 100% of the time all the year can be realized by matching with a phase-change refrigeration air conditioner.
In one embodiment, the main control module may be implemented by a control chip, such as a single chip or a programmable logic device. The main control module automatically enters a normal power supply mode after being started, when the power supply module is switched to emergency power supply, a switching signal is sent to the main control module, and the main control module enters the emergency power supply mode. The indoor temperature and the working state of the tail end of the indoor air conditioner can be monitored in real time in a cabinet level, and a movable ring system can be connected to monitor in real time in a remote mode.
In another embodiment, the main control module is realized by a simple hardware circuit. With reference to fig. 3, the main control module includes a first comparing unit, a second comparing unit, a switching unit and a logic output unit; the switching unit switches the comparison threshold values of the first comparison unit and the second comparison unit; the first comparison unit compares the indoor temperature with a threshold value, if the indoor temperature exceeds the threshold value, the indoor temperature is output as a high level, a first control signal is output, and the air-cooled heat pipe backboard air conditioner is controlled to refrigerate; the second comparison unit compares the outdoor temperature with a threshold value, and outputs a high level if the outdoor temperature exceeds the threshold value; and the logic output unit takes the output phase of the first comparison unit and the output phase of the second comparison unit as a second control signal to control the air-cooled heat pipe backboard to perform air conditioning refrigeration.
In one embodiment, when the UPS is switched to power supply, power is supplied to the switching unit, and the switching unit is a magnetic latching relay and comprises two switches. A normally closed contact of a first switch is connected to a voltage reference corresponding to a first threshold t1 ℃, and a normally open contact is connected to a voltage reference corresponding to a second threshold t2 ℃; the normally closed contact of the second switch is connected to the voltage reference corresponding to the first threshold (t1-5) DEG C, and the normally open contact is connected to the voltage reference corresponding to the second threshold (t2-5) DEG C. After power is supplied, the normally closed contact of the magnetic latching relay is disconnected, and the normally open contact is connected, so that the threshold value of the negative end of the access comparator is switched from the threshold value under the normal power supply condition to the threshold value under the emergency condition. Because the magnetic latching relay is kept in the state of the conduction of the normally open contact due to the magnetic latching characteristic, the magnetic latching relay needs to be reset when the normal power supply is recovered, so that the magnetic latching relay is recovered to the state of the conduction of the normally closed contact. And the logic output unit adopts an AND gate to compare the output phases of the two comparators, and when the output of the first comparator is high, the current indoor temperature is higher than 25 ℃ or 55 ℃, refrigeration is required, and the air-cooled heat pipe backboard air conditioner is started for refrigeration. When the output of the second comparator is high, the outdoor temperature is high, and the air-cooled heat pipe back plate air conditioner cannot start refrigeration, so that when the outputs of the first comparator and the second comparator are both high, the phase-change energy storage air conditioner is started to refrigerate. The circuit is simple in structure, high in reliability and particularly suitable for scenes with large interference of machine room base stations.
To sum up, the utility model relates to a 48V direct current supply refrigeration system for machine rooms and base stations, wherein the indoor and outdoor units of an air-cooled heat pipe backboard air-conditioning are 48V direct current fans, and the cold energy stored by a phase change energy storage air conditioner is transmitted to indoor cooling through the 48V direct current fans; the power supply module converts commercial power into 48V direct current to provide normal power supply for the refrigeration system; when commercial power is available, when the outdoor temperature is low, the air-cooled heat pipe backboard air-conditioning indoor and outdoor units operate to provide enough cooling capacity, the machine room air-conditioner does not operate, when the outdoor temperature is high, the air-cooled heat pipe backboard air-conditioning indoor and outdoor units cannot provide enough cooling capacity, and the machine room air-conditioner operates at this time and operates together with the heat pipe backboard air-conditioner to provide cooling capacity required by the machine room; when the commercial power is cut off, the UPS is switched to be used for providing emergency power supply for the refrigerating system; the main control module controls the air-cooled heat pipe back plate air conditioner to refrigerate when the indoor temperature is higher than 55 ℃ or 45 ℃ and the outdoor temperature is lower than 50 ℃ or 40 ℃ in an emergency power supply mode according to the collected indoor and outdoor temperatures, and controls the phase change energy storage air conditioner to refrigerate when the outdoor temperature is higher than 50 ℃ or 40 ℃; the requirement of power failure emergency refrigeration is met, the temperature of the machine room is controlled to be 55 ℃ or even below 45 ℃, and emergency refrigeration can be carried out for 4 hours.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A48V direct current powered refrigeration system for machine rooms and base stations is characterized by comprising a temperature acquisition module, an air-cooled heat pipe back plate air conditioner, a phase change energy storage air conditioner, a power supply module and a main control module;
the temperature acquisition module acquires indoor and outdoor temperatures;
the indoor unit and the outdoor unit of the air-cooled heat pipe backboard air-conditioning unit are all 48V direct current fans;
the cold energy stored by the phase-change energy-storage air conditioner is transferred to the indoor for cooling through a 48V direct current fan;
the power supply module converts commercial power into 48V direct current to provide normal power supply for the refrigeration system; when the commercial power is cut off, the UPS is switched to be used for providing emergency 48V direct current power supply for the refrigerating system;
the main control module controls the air-cooled heat pipe back plate air conditioner to refrigerate when the indoor temperature is higher than a first threshold value t1 ℃ and the outdoor temperature is not higher than (t1-5) DEG C under a normal power supply mode according to the collected indoor and outdoor temperatures; when the outdoor temperature is higher than (t1-5) DEG C, controlling to start the phase change energy storage air conditioner or the machine room air conditioner for refrigeration; in an emergency power supply mode, when the indoor temperature is higher than a second threshold value t2 ℃ and the outdoor temperature is not higher than (t2-5) DEG C, controlling the air-cooled heat pipe back plate air conditioner to refrigerate, and when the outdoor temperature is higher than (t2-5) DEG C, controlling the phase change energy storage air conditioner to start to refrigerate; t2> t 1.
2. The refrigeration system for the machine room and the base station supplied with the 48V direct current according to claim 1, wherein the machine room and the base station are 5G machine rooms and base stations, and the first threshold t1 is 22-25 ℃; the second threshold t2 is 45-55 ℃.
3. The refrigeration system of claim 1 or 2, wherein the refrigerant in the air-cooled heat pipe back plate air-conditioning indoor unit absorbs heat and is converted into a gaseous refrigerant, the gaseous refrigerant enters the air-cooled heat pipe back plate air-conditioning outdoor unit, and is converted into a liquid refrigerant after being cooled, and the liquid refrigerant returns to the air-cooled heat pipe back plate air-conditioning indoor unit.
4. The machine room and base station 48V DC powered refrigeration system of claim 3, wherein the air cooled heat pipe back panel outdoor air conditioning unit is higher than the air cooled heat pipe back panel indoor air conditioning unit, and the liquid refrigerant returns to the air cooled heat pipe back panel indoor air conditioning unit by gravity;
or the air-cooled heat pipe back plate air-conditioning outdoor unit is not higher than the air-cooled heat pipe back plate air-conditioning indoor unit, and the liquid refrigerant returns to the air-cooled heat pipe back plate air-conditioning indoor unit under the action of the liquid pump.
5. The 48V direct-current-powered refrigerating system for the machine room and the base station as claimed in claim 3, wherein two ends of the air-cooled heat pipe back plate air-conditioning indoor unit are respectively connected to a refrigerant pipe through a hose, the refrigerant pipes on two sides are connected to the air-cooled heat pipe back plate air-conditioning outdoor unit, the refrigerant pipes on two sides are respectively provided with a filling valve for filling refrigerant and a valve for controlling the flow of the refrigerant, and the liquid refrigerant passes through a liquid viewing mirror arranged on the air-cooled heat pipe back plate air-conditioning indoor unit to observe the liquid level of the refrigerant.
6. The machine room and base station 48V DC powered refrigeration system according to claim 1 or 2, wherein the air-cooled heat pipe back plate air conditioner adopts a dual-system redundancy structure, and comprises two sets of heat exchangers arranged independently, and each set of heat exchanger can independently provide the cooling capacity required by the whole refrigeration air conditioning system.
7. The refrigerating system for the machine room and the base station powered by the 48V direct current according to claim 1 or 2, wherein the main control module automatically enters a normal power supply mode after being started, when the power supply module is switched to emergency power supply, a switching signal is sent to the main control module, and the main control module enters the emergency power supply mode;
the main control module comprises a first comparison unit, a second comparison unit, a switching unit and a logic output unit; the switching unit switches the comparison threshold values of the first comparison unit and the second comparison unit; the first comparison unit compares the indoor temperature with a threshold value, if the indoor temperature exceeds the threshold value, the indoor temperature is output as a high level, a first control signal is output, and the air-cooled heat pipe backboard air conditioner is controlled to refrigerate; the second comparison unit compares the outdoor temperature with a threshold value, and outputs a high level if the outdoor temperature exceeds the threshold value; and the logic output unit takes the output phase of the first comparison unit and the output phase of the second comparison unit as a second control signal to control the air-cooled heat pipe backboard to perform air conditioning refrigeration.
8. The refrigeration system of claim 7, wherein the switching unit is a magnetic latching relay, and comprises two switches, a normally closed contact of the first switch is connected to a voltage reference corresponding to a first threshold t1 ℃, and a normally open contact of the first switch is connected to a voltage reference corresponding to a second threshold t2 ℃; the normally closed contact of the second switch is connected to the voltage reference corresponding to the first threshold (t1-5) DEG C, and the normally open contact is connected to the voltage reference corresponding to the second threshold (t2-5) DEG C.
9. The refrigerating system for the machine room and the base station powered by the 48V direct current according to claim 1 or 2, wherein the air-cooled heat pipe backboard air conditioner indoor and outdoor units can start refrigeration when the temperature difference is not less than 5 ℃; the phase change energy storage air conditioner is an independent refrigeration device.
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| CN202021727492.1U CN212436207U (en) | 2020-08-18 | 2020-08-18 | Machine room and 48V direct current power supply refrigeration system for base station |
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| CN202021727492.1U CN212436207U (en) | 2020-08-18 | 2020-08-18 | Machine room and 48V direct current power supply refrigeration system for base station |
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