CN113970140A - Machine room air conditioning system and control method and controller thereof - Google Patents
Machine room air conditioning system and control method and controller thereof Download PDFInfo
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- CN113970140A CN113970140A CN202010722783.XA CN202010722783A CN113970140A CN 113970140 A CN113970140 A CN 113970140A CN 202010722783 A CN202010722783 A CN 202010722783A CN 113970140 A CN113970140 A CN 113970140A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000003507 refrigerant Substances 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 239000007788 liquid Substances 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Thermal Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention relates to the technical field of machine room operation and maintenance, and discloses a machine room air conditioning system and a control method and a controller thereof. The system comprises an air conditioner indoor unit, a first air conditioner outdoor unit, a second air conditioner outdoor unit, a heater, a controller, a first temperature detection unit, a second temperature detection unit, a first valve and a second valve; the air conditioner indoor unit and the first temperature detection unit are positioned in the machine room, the first air conditioner outdoor unit, the heater and the second temperature detection unit are positioned in the generator room, and the second air conditioner outdoor unit is positioned outdoors; if the generator room has a heating requirement and the generator room has a cooling requirement, the controller is used for controlling the first valve and the fan of the first air-conditioning outdoor unit to be opened, so that the refrigerant of the air-conditioning indoor unit flows into the first air-conditioning outdoor unit through the first valve and returns to the air-conditioning indoor unit to form a cycle. The embodiment of the invention reduces the operation time of the heater, saves electric energy and reduces the failure rate.
Description
Technical Field
The embodiment of the invention relates to the technical field of machine room operation and maintenance, in particular to a machine room air conditioning system and a control method and a controller thereof.
Background
With the rapid development of the communication industry, the problems of energy conservation and emission reduction are becoming more and more severe. The large-scale data center can produce huge heat because of the operation of consumer such as server, switch, and these heats need be discharged to the open air through air conditioning system, and air conditioning system also can consume a large amount of electric energy or water resource simultaneously, consequently produces dual energy consumption.
The data center has extremely high requirements on the continuity of power supply, and the data center is generally provided with a diesel generator, and when the mains supply is powered off, the diesel generator needs to be immediately switched to supply power. Diesel generator generally installs in the generator room of independent design, in order to guarantee that diesel generator can in time start in order to deal with various emergency, generator room temperature need maintain about 20 ~ 30 ℃.
In order to keep the temperature of the generator room, the diesel generator is provided with a set of water jacket heater, the diesel generator is heated to keep the temperature of the diesel generator, and the water jacket heater is started to heat when the indoor temperature is lower than 25 ℃. The water jacket heater will consume a small amount of electrical energy every year. And the water pipe of the water jacket heater is easy to age, burst, leak and the like due to long-term heating, has high failure rate and has potential safety hazard.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a machine room air conditioning system, and a control method and a controller thereof, which are used to solve the problems of long operation time, high energy consumption, and high failure rate of a water jacket heater in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a machine room air conditioning system including:
the air conditioner comprises an air conditioner indoor unit, a first air conditioner outdoor unit, a second air conditioner outdoor unit, a heater, a controller, a first temperature detection unit, a second temperature detection unit, a first valve and a second valve;
the air conditioner indoor unit and the first temperature detection unit are positioned in a machine room, the first air conditioner outdoor unit, the heater and the second temperature detection unit are positioned in a generator room, and the second air conditioner outdoor unit is positioned outdoors;
the controller is respectively connected with the indoor air conditioner, the first outdoor air conditioner, the second outdoor air conditioner, the heater, the first temperature detection unit, the second temperature detection unit, the first valve and the second valve, and is used for controlling the indoor air conditioner, the first outdoor air conditioner, the second outdoor air conditioner, the heater, the first valve and the second valve to work and receiving temperature signals collected by the first temperature detection unit and the second temperature detection unit;
if the generator room has a heating requirement and the generator room has a refrigerating requirement, the controller is used for controlling the first valve and the fan of the first air-conditioning outdoor unit to be opened, so that the refrigerant of the air-conditioning indoor unit flows into the first air-conditioning outdoor unit through the first valve and returns to the air-conditioning indoor unit to form a cycle;
and if the generator room has no heating requirement, the controller is used for controlling to open the second valve, so that the refrigerant of the indoor air conditioner flows into the second outdoor air conditioner via the second valve and returns to the indoor air conditioner to form a cycle.
In an alternative mode, a check valve is connected between the first outdoor unit and the second outdoor unit.
In an optional mode, the indoor air conditioner, the first valve, the first outdoor air conditioner, the check valve and the second outdoor air conditioner are sequentially connected in series to form a loop, and the second valve is connected in parallel to two ends of the first valve and two ends of the check valve;
a liquid storage tank is connected between the air conditioner indoor unit and the second air conditioner outdoor unit;
the vertical height of the first air conditioner outdoor unit is greater than that of the second air conditioner outdoor unit.
In an optional mode, the first valve includes a first sub-valve and a fourth sub-valve, the second valve includes a second sub-valve and a third sub-valve, the system further includes a first check valve and a second check valve, the indoor unit of the air conditioner, the first sub-valve, the first outdoor unit of the air conditioner, the check valve and the fourth sub-valve are sequentially connected in series to form a loop, and the indoor unit of the air conditioner, the second sub-valve, the third sub-valve, the second outdoor unit of the air conditioner and the second check valve are sequentially connected in series to form a loop.
In an optional mode, the system further comprises a liquid storage tank, a first check valve and a second check valve, the indoor unit of the air conditioner, the first valve, the outdoor unit of the air conditioner, the first check valve, the liquid storage tank and the outdoor unit of the second air conditioner are sequentially connected in series to form a loop, and the second valve, the outdoor unit of the second air conditioner and the second check valve are connected in series and then connected in parallel to two ends of the first valve and the first check valve.
In an optional mode, the indoor unit of the air conditioner is an evaporator, the first outdoor unit of the air conditioner and the second outdoor unit of the air conditioner are condensers, the heaters are water jacket heaters, the first temperature detection unit and the second temperature detection unit are temperature sensors or temperature and humidity sensors, and the valve is a shut-off valve.
In an alternative form, the valve is a ball valve.
In an alternative mode, the controller controls the heater to be turned on or off by controlling a relay of the heater;
if the generator room has a heating requirement and the generator room has a refrigerating requirement, the controller is also used for controlling the relay of the heater to be sucked so as to enable the heater to work and controlling the second valve to be closed so as to enable the refrigerant of the indoor unit of the air conditioner not to flow into the second outdoor unit of the air conditioner through the second valve;
if the generator room has no heating requirement, the controller is further used for controlling the relay of the heater to be disconnected so as to stop the heater and controlling the first valve to be closed, so that the refrigerant of the air conditioner indoor unit does not flow into the first air conditioner outdoor unit through the first valve.
According to another aspect of an embodiment of the present invention, there is provided a control method of a machine room air conditioning system, including:
the controller receives a first temperature signal acquired by the first temperature detection unit and a second temperature signal acquired by the second temperature detection unit;
the controller judges whether the temperature of the generator room is greater than a first threshold value according to the first temperature signal and judges whether the temperature of the generator room is less than a second threshold value according to the second temperature signal;
if the temperature of the machine room is greater than the first threshold value and the temperature of the machine room is less than the second threshold value, the machine room has a heating requirement and a refrigerating requirement, and the controller controls to open the first valve and a fan of the first air conditioner outdoor unit, so that the refrigerant of the air conditioner indoor unit flows into the first air conditioner outdoor unit through the first valve and returns to the air conditioner indoor unit to form a cycle;
if the temperature of the generator room is not greater than the second threshold value, the generator room has no heating requirement, and the controller controls to open the second valve, so that the refrigerant of the indoor air conditioner flows into the second outdoor air conditioner via the second valve and returns to the indoor air conditioner to form a cycle.
According to another aspect of the embodiments of the present invention, there is provided a controller including: a processing unit and a storage unit;
the storage unit is used for storing at least one executable instruction, and the executable instruction enables the processing unit to execute the control method of the machine room air conditioning system.
According to the embodiment of the invention, two air conditioner outdoor units are arranged, wherein one air conditioner outdoor unit is positioned in the generator room, when the generator room has a heating requirement and the generator room has a refrigerating requirement, a first valve for communicating the air conditioner indoor unit with the first air conditioner outdoor unit and a fan of the first air conditioner outdoor unit are opened, so that a refrigerant of the air conditioner indoor unit flows into the first air conditioner outdoor unit through the first valve and returns to the air conditioner indoor unit to form a cycle, and heat generated when the air conditioner outdoor unit positioned in the generator room works can be supplied to the interior of the generator room, so that the running time of a heater is reduced, the energy consumption is reduced, and the high failure rate caused by long-time operation of the heater is also reduced.
The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and the embodiments of the present invention can be implemented according to the content of the description in order to make the technical means of the embodiments of the present invention more clearly understood, and the detailed description of the present invention is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present invention more clearly understandable.
Drawings
The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a block diagram of a structure of a machine room air conditioning system of embodiment 1 of the present invention;
fig. 2 is a flowchart of a control method of a machine room air conditioning system of embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a machine room air conditioning system according to embodiment 3 of the present invention;
FIG. 4 is a schematic diagram of the control logic of the controller of embodiments 3 and 5 of the present invention;
fig. 5 is a schematic structural view of a machine room air conditioning system according to embodiment 4 of the present invention;
FIG. 6 is a control logic diagram of a controller according to embodiment 4 of the present invention;
fig. 7 is a schematic structural view of a machine room air conditioning system according to embodiment 5 of the present invention;
fig. 8 is a schematic structural diagram of a controller according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein.
In the related technology, the water jacket heater needs to be started when the diesel generating set is in a standby state for a long time, and a large amount of electric energy is consumed in low-temperature seasons every year; the waste heat of the condenser of the outdoor unit of the air conditioner of the machine room is not effectively utilized in winter; when the water jacket heater normally operates, the temperature of an outlet water pipe reaches 80-90 ℃, the problems of pipeline aging, bursting, water leakage and the like are easily caused by long-term operation, and potential safety hazards are increased.
Therefore, the embodiment of the invention provides a machine room air conditioning system, which utilizes waste heat of a condenser of an outdoor unit of an air conditioner of a machine room, supplies heat to a generator room through the waste heat of the condenser, reduces the running time of a water jacket heater, realizes energy conservation and emission reduction, and reduces high failure rate caused by long-time running of the water jacket heater.
Fig. 1 is a block diagram showing the structure of a machine room air conditioning system according to embodiment 1 of the present invention. As shown in fig. 1, the system includes an indoor unit 11, a first outdoor unit 12, a second outdoor unit 13, a heater 14, a controller 15, a first temperature detecting unit 16, a second temperature detecting unit 17, a first valve 18, and a second valve 19; the indoor air conditioner 11 and the first temperature detection unit 16 are located in a machine room, the first outdoor air conditioner 12, the heater 14 and the second temperature detection unit 17 are located in a generator room, and the second outdoor air conditioner 13 is located outdoors; the controller 15 is respectively connected to the indoor air conditioner 11, the first outdoor air conditioner 12, the second outdoor air conditioner 13, the heater 14, the first temperature detecting unit 16, the second temperature detecting unit 17, the first valve 18, and the second valve 19, and is configured to control operations of the indoor air conditioner 11, the first outdoor air conditioner 12, the second outdoor air conditioner 13, the heater 14, the first valve 18, and the second valve 19, and receive temperature signals collected by the first temperature detecting unit 16 and the second temperature detecting unit 17. The machine room may be a data machine room (also referred to as an IT machine room) or other machine rooms with cooling requirements. The second outdoor unit 13 may be an original outdoor unit, and the first outdoor unit 12 is a newly added outdoor unit.
If the generator room has a heating requirement, the controller 15 is configured to control to open the first valve 18 and the fan of the first air-conditioning outdoor unit 12, so that the refrigerant of the air-conditioning indoor unit 11 flows into the first air-conditioning outdoor unit 12 through the first valve 18 and returns to the air-conditioning indoor unit 11 to form a circulation; if the generator room has no heating requirement, the controller 15 is configured to control to open the second valve 19, so that the refrigerant of the indoor unit 11 flows into the second outdoor unit 13 through the second valve 19 and returns to the indoor unit 11 to form a cycle.
Further, the controller 15 controls the heater 14 to be turned on or off by controlling a relay of the heater 14.
Further, if the generator room has a heating requirement, the controller 15 is further configured to control a relay of the heater 14 to be closed to operate the heater 14, and control to close the second valve 19, so that the refrigerant in the indoor air conditioner 11 flows into the second outdoor air conditioner 13 without passing through the second valve 19; if the generator room has no heating requirement, the controller 15 is further configured to control the relay of the heater 14 to be turned off to stop the heater 14, and control the first valve 18 to be closed, so that the refrigerant in the indoor air conditioner 11 does not flow into the first outdoor air conditioner 12 through the first valve 18.
Further, a check valve 20 is connected between the first air conditioner outdoor unit 12 and the second air conditioner outdoor unit 13.
Further, the indoor unit 11 is an evaporator, the first outdoor unit 12 and the second outdoor unit 13 are condensers, the heater 14 is a water jacket heater, the first temperature detecting unit 16 and the second temperature detecting unit 17 are temperature sensors or temperature and humidity sensors, and the valve is a shut-off valve, such as a ball valve, particularly an electric ball valve.
According to the embodiment of the invention, two air conditioner outdoor units are arranged, wherein one air conditioner outdoor unit is positioned in the generator room, when the generator room has a heating requirement and the generator room has a refrigerating requirement, a first valve for communicating the air conditioner indoor unit with the first air conditioner outdoor unit and a fan of the first air conditioner outdoor unit are opened, so that a refrigerant of the air conditioner indoor unit flows into the first air conditioner outdoor unit through the first valve and returns to the air conditioner indoor unit to form a cycle, and heat generated when the air conditioner outdoor unit positioned in the generator room works can be supplied to the interior of the generator room, so that the running time of a heater is reduced, the energy consumption is reduced, and the high failure rate caused by long-time operation of the heater is also reduced.
Fig. 2 is a flowchart of a control method of a machine room air conditioning system according to embodiment 2 of the present invention, and the method can be applied to the machine room air conditioning system described in embodiment 1, and in particular, to a controller of the machine room air conditioning system. As shown in fig. 2, the method includes:
step 201: the controller receives a first temperature signal acquired by the first temperature detection unit and a second temperature signal acquired by the second temperature detection unit;
step 202: the controller judges whether the temperature of the generator room is greater than a first threshold value according to the first temperature signal and judges whether the temperature of the generator room is less than a second threshold value according to the second temperature signal;
step 203: if the temperature of the machine room is greater than the first threshold value and the temperature of the machine room is less than the second threshold value, the machine room has a heating requirement and a refrigerating requirement, and the controller controls to open the first valve and a fan of the first air conditioner outdoor unit, so that the refrigerant of the air conditioner indoor unit flows into the first air conditioner outdoor unit through the first valve and returns to the air conditioner indoor unit to form a cycle;
the first threshold and the second threshold may be set according to actual requirements, for example, the first threshold is 18 ℃ and the second threshold is 25 ℃.
Step 204: if the temperature of the generator room is not greater than the second threshold value, the generator room has no heating requirement, and the controller controls to open the second valve, so that the refrigerant of the indoor air conditioner flows into the second outdoor air conditioner via the second valve and returns to the indoor air conditioner to form a cycle.
According to the embodiment of the invention, two air conditioner outdoor units are arranged, wherein one air conditioner outdoor unit is positioned in the generator room, when the generator room has a heating requirement and the generator room has a refrigerating requirement, a first valve for communicating the air conditioner indoor unit with the first air conditioner outdoor unit and a fan of the first air conditioner outdoor unit are opened, so that a refrigerant of the air conditioner indoor unit flows into the first air conditioner outdoor unit through the first valve and returns to the air conditioner indoor unit to form a cycle, and heat generated when the air conditioner outdoor unit positioned in the generator room works can be supplied to the interior of the generator room, so that the running time of a heater is reduced, the energy consumption is reduced, and the high failure rate caused by long-time operation of the heater is also reduced.
Fig. 3 is a schematic structural diagram of a machine room air conditioning system according to embodiment 3 of the present invention. As shown in fig. 3, the system includes an air conditioner indoor unit and a temperature and humidity sensor 1 located in an IT machine room, an outdoor unit 1, a water jacket heater, a controller, a temperature and humidity sensor 2, a temperature and humidity sensor 3, a temperature and humidity sensor 4, an electric ball valve 1, a check valve and an electric ball valve 2 located in a generator room, an outdoor unit 2 located outdoors and a liquid storage tank.
The indoor unit of the air conditioner comprises an indoor unit and a compressor, wherein the indoor unit is an evaporator, so that liquid low-temperature refrigerant is evaporated under low pressure to be converted into steam, the heat of the evaporator is absorbed, and the compressor is used for compressing the refrigerant. The outdoor unit 1 and the outdoor unit 2 are both condensers, and change a high-temperature and high-pressure gaseous refrigerant into a low-temperature and high-pressure liquid refrigerant by exchanging heat with air outdoors.
Furthermore, an expansion valve can be arranged in the IT machine room, is positioned on an outdoor liquid storage tank and a refrigerant circulation passage of an indoor machine and plays a role in throttling and reducing pressure, and the expansion valve enables the medium-temperature high-pressure liquid refrigerant to be throttled into low-temperature low-pressure wet steam through the expansion valve.
Temperature and humidity sensor 1 in the IT computer lab is used for detecting the temperature in the IT computer lab, and 3 temperature and humidity sensor in the generator lab are used for detecting the temperature in the generator lab, and final controller 4 makes temperature detection more accurate with the temperature calculation average value that temperature and humidity sensor 2, temperature and humidity sensor 3, temperature and humidity sensor 4 in the generator lab detected. The temperature and humidity sensor is also called a temperature probe.
A relay is arranged in a distribution box of the water jacket heater, and the relay can be controlled to be closed and opened through a controller, so that the working state of the water jacket heater is controlled.
The controller is respectively connected with the indoor unit, the outdoor unit 1, the outdoor unit 2, the relay of the water jacket heater, the temperature and humidity sensor 1, the temperature and humidity sensor 2, the temperature and humidity sensor 3, the temperature and humidity sensor 4, the electric ball valve 1 and the electric ball valve 2, and is used for controlling the indoor unit, the outdoor unit 1, the outdoor unit 2, the water jacket heater, the electric ball valve 1 and the electric ball valve 2 to work and receiving temperature signals collected by the temperature and humidity sensors. The controller can also be additionally provided with a display screen for displaying and receiving user operation. Temperature and humidity sensors in the IT machine room can be installed on the air return port side of the indoor unit. The temperature and humidity sensor 2, the temperature and humidity sensor 3 and the temperature and humidity sensor 4 can be respectively installed near 3 oil engines in the generator room.
The indoor unit, the compressor, the electric ball valve 1, the outdoor unit 1, the check valve, the outdoor unit 2, the liquid storage tank and the expansion valve are sequentially connected in series to form a loop, and the electric ball valve 2 is connected in parallel to two ends of the electric ball valve 1 and the check valve.
Further, high pressure sensors 1 and 2 for detecting pressures are provided on pipes through which the refrigerant flows into the outdoor unit 1 and the outdoor unit 2, respectively.
According to the embodiment, a condenser can be connected in series in an original special air conditioning system for the machine room and arranged in the generator room for heat utilization, one compressor system is reformed into two outdoor units corresponding to one compressor system by corresponding to one outdoor unit, the two outdoor units are designed in series, and a liquid storage tank is additionally arranged in a pipeline to ensure that the pressure of the system is stable. The two outdoor units are arranged at different positions, one outdoor unit is arranged in the generator room, the other outdoor unit is arranged outdoors, and a short circuit bypass pipeline and an electric ball valve are additionally arranged on the side of the outdoor unit in the generator room, so that the switching function of the operation mode of the single outdoor unit and the operation mode of the double outdoor units is realized.
When the generator room has a heating demand, the electric ball valve 1 is opened, and the electric ball valve 2 is closed. The refrigerant from the compressor respectively passes through the electric ball valve 1, the outdoor unit 1, the check valve, the outdoor unit 2, the liquid storage tank, the expansion valve and the indoor unit and then returns to the compressor to complete a cycle, and the refrigerant does not allow climbing to the outdoor unit 2, so that the vertical height of the outdoor unit 1 is required to be greater than that of the outdoor unit 2, the liquefied refrigerant can flow from the outdoor unit 1 to the outdoor unit 2, the pressure drop of the outdoor unit 1 can be reduced, and after the outdoor unit 1 finishes heat dissipation, heat dissipation is carried out on the refrigerant to the outdoor unit 2, and the heat dissipation capacity of the outdoor unit 2 is ensured.
When the generator room does not have the heating demand, the electric ball valve 1 is closed, and the electric ball valve 2 is opened. Refrigerant from the compressor respectively passes through the electric ball valve 2, the outdoor unit 2, the liquid storage tank, the expansion valve and the indoor unit and then returns to the compressor to complete a cycle.
The temperature set point of the IT machine room air conditioner is 18 ℃ (adjustable), and the IT machine room air conditioner can operate according to self control logic. The temperature set point of a generator room in the controller is 25-35 ℃ (adjustable), the return difference is 2 ℃ (adjustable), and input signals are a temperature and humidity sensor 1, a temperature and humidity sensor 2, a temperature and humidity sensor 3 and a temperature and humidity sensor 4 respectively; the output signals comprise signals for controlling the starting and stopping of a fan of the outdoor unit 1, the on and off of a distribution box relay of the water jacket heater, the starting and stopping of an indoor unit of the air conditioner, the opening and closing of the electric ball valve 1 and the opening and closing of the electric ball valve 2.
The control logic of the controller of this embodiment is shown in fig. 4:
step 401: judging whether the mode is a manual mode, if so, executing a step 402, otherwise, executing a step 403;
under normal conditions, the controller system judges whether the manual mode is available or not when being started.
Step 402: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, a closing signal of a fan of a generator room and a relay disconnection signal of a water jacket heater;
if the mode is switched to the manual mode, the system outputs the signal. The water jacket heater adopts two control modes, namely remote control and manual control, so that the condition that the water jacket heater cannot operate due to the fault of a controller is prevented. In the manual mode, the operation of the air conditioning system of the machine room is similar to that before the improvement, and only the outdoor unit 2 operates.
Step 403: judging whether the sensor is in fault, if so, executing step 404, otherwise, executing step 405;
if the manual mode is not adopted, the system can carry out self-checking to detect whether the sensor is in failure or not.
Step 404: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, a closing signal of a fan of a generator room and a suction signal of a relay of a water jacket heater;
if the sensor is in fault, the system outputs the signal, the operation of the air conditioning system of the machine room is similar to that before improvement, and only the outdoor unit 2 operates.
Step 405: judging whether the temperature of the generator room is less than 25 ℃, if so, executing a step 406, otherwise, executing a step 409;
and if the sensor has no fault, judging the temperature of the generator room.
Step 406: judging whether the temperature of the IT machine room is more than or equal to 18 ℃, if so, executing step 407, otherwise, executing step 408;
step 407: outputting an opening signal of the electric ball valve 1, a closing signal of the electric ball valve 2, a fan opening signal of a generator room and a relay suction signal of a water jacket heater;
step 408: outputting an air conditioner shutdown signal, a generator room fan shutdown signal and a water jacket heater relay actuation signal;
step 409: judging whether the temperature of the generator room is more than 35 ℃, if so, executing a step 410, otherwise, executing a step 416;
step 410: judging whether the temperature of the IT machine room is more than or equal to 24 ℃, if so, executing a step 411, otherwise, executing a step 412;
step 411: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, a closing signal of a fan of a generator room and a relay disconnection signal of a water jacket heater;
step 412: judging whether the temperature of (24-return difference) DEG C (DEG C) is less than the temperature of an IT machine room (IT) and less than 24 ℃, if so, executing a step 413, otherwise, executing a step 414;
step 413: and keeping the state of the last moment, namely, the system does not output signals.
Step 414: judging whether the temperature of the IT machine room is lower than (24-return difference) DEG C, if so, executing a step 415;
step 415: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, a closing signal of a fan of a generator room, a relay disconnection signal of a water jacket heater and a remote shutdown signal;
in this step, the indoor unit is stopped because the indoor unit does not have a refrigeration requirement, but in order to facilitate the next time the indoor unit is opened, the refrigerant can be delivered to the outdoor unit 2, and therefore the valve needs to be switched in place before the indoor unit is stopped, that is, the electric ball valve 2 needs to be opened.
Step 416: judging whether the temperature of the IT machine room is more than or equal to 24 ℃ and whether the water jacket heater operates, if so, executing a step 417, otherwise, executing a step 418;
step 417: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, a closing signal of a fan of a generator room and a relay disconnection signal of a water jacket heater;
step 418: and keeping the state of the last moment, namely, the system does not output signals.
To sum up, when the temperature of the IT machine room is more than or equal to 24 ℃, the refrigeration requirement of the IT machine room is large, the air conditioner must be started at the moment, the temperature of the machine room is ensured, the outdoor unit 1 judges whether to be started according to the temperature of the generator room at the moment, the outdoor unit is closed after the temperature of the generator room is more than 35 ℃, and the outdoor unit is opened after the temperature of the generator room is less than 25 ℃.
When the temperature of the IT machine room is 18 ℃ to 24 ℃, the refrigeration requirement of the IT machine room is not large, the energy-saving effect is considered, the air conditioner is judged to be opened or not by combining the temperature of the generator room at the moment, when the temperature of the generator room is more than 35 ℃, the heating requirement of the generator room is not needed at the moment, the indoor unit 1 can be closed, when the temperature of the generator room is less than 25 ℃, the air conditioner needs to be heated, and therefore, the air conditioner operates, and the generator room carries out waste heat utilization.
When the temperature of the IT machine room is less than or equal to 18 ℃, the indoor machine of the IT machine room is shut down, the outdoor machine 1 and the outdoor machine 2 are closed, and at the moment, when the temperature of the generator room is less than or equal to 25 ℃, the controller remotely controls the relay of the distribution box of the water jacket heater to be closed.
According to the scheme of the embodiment of the invention, the running time of the water jacket heater is reduced by utilizing the working heat of the outdoor unit 1, the risk of the fault of the water jacket heater is reduced, and the electric quantity is saved. The system has the advantages of simple structure, small transformation and construction difficulty, high reliability, convenience in operation and maintenance, low investment cost and short cost return time. The embodiment of the invention has simple requirements on the structure of the machine room, has no special requirements, meets the condition that the generator room is positioned at the position close to the IT machine room, and is suitable for the transformation of most of the existing machine rooms.
Fig. 5 is a schematic structural diagram of a machine room air conditioning system in embodiment 4 of the present invention, and the present embodiment is different from embodiment 3 mainly in the arrangement of an electric ball valve and a check valve. As shown in fig. 5, the system comprises an air conditioner indoor unit and a temperature probe 1 which are positioned in an IT machine room, an outdoor unit 1, a water jacket heater, a controller, a temperature probe 2, a temperature probe 3, a temperature probe 4, an electric ball valve 1, a check valve 1 and an electric ball valve 2 which are positioned in a generator room, and an outdoor unit 2, an electric ball valve 3, an electric ball valve 4 and a check valve 2 which are positioned outdoors. The same parts as those in embodiment 3 will not be described again.
The controller is respectively connected with the indoor unit, the outdoor unit 1, the outdoor unit 2, the relay of the water jacket heater, the temperature probe 1, the temperature probe 2, the temperature probe 3, the temperature probe 4, the electric ball valve 1, the electric ball valve 2, the electric ball valve 3 and the electric ball valve 4, and is used for controlling the work of the indoor unit, the outdoor unit 1, the outdoor unit 2, the water jacket heater, the electric ball valve 1, the electric ball valve 2, the electric ball valve 3 and the electric ball valve 4 and receiving temperature signals collected by the temperature probes.
The indoor unit, the compressor, the electric ball valve 1, the outdoor unit 1, the check valve 1, the electric ball valve 4 and the expansion valve are sequentially connected in series to form a loop, the electric ball valve 2 is connected in parallel at two ends of the electric ball valve 1 and the check valve 1, the electric ball valve 3, the outdoor unit 2 and the check valve 2 are sequentially connected in series and then connected in parallel at two ends of the electric ball valve 4, and the indoor unit, the compressor, the electric ball valve 2, the electric ball valve 3, the outdoor unit 2, the check valve 2 and the expansion valve are sequentially connected in series to form a loop.
According to the embodiment, a condenser can be additionally arranged in the special air conditioning system for the original machine room, the condenser is arranged in the generator room for heat utilization, and one compressor system is reformed into two outdoor units corresponding to one compressor system corresponding to one outdoor unit. The two outdoor units are arranged at different positions, wherein one outdoor unit is arranged in the generator room, and the other outdoor unit is arranged outdoors. The two outdoor units are designed in series, and a short-circuit bypass pipeline and an electric ball valve are additionally arranged on the side of each outdoor unit, so that the function of switching the operation modes of the two outdoor units is achieved.
When generator room has the demand of heating, electric ball valve 1 opens, and electric ball valve 2 closes, and electric ball valve 3 closes, and electric ball valve 4 opens. Refrigerant from the compressor respectively passes through the electric ball valve 1, the outdoor unit 1, the check valve 1, the electric ball valve 4, the expansion valve and the indoor unit and then returns to the compressor to complete a cycle.
When the generator room does not have the demand of heating, electric ball valve 1 closes, and electric ball valve 2 opens, and electric ball valve 3 opens, and electric ball valve 4 closes. Refrigerant from the compressor respectively passes through the electric ball valve 2, the electric ball valve 3, the outdoor unit 2, the check valve 2, the expansion valve and the indoor unit and then returns to the compressor to complete a cycle.
The control logic of the controller of this embodiment is shown in fig. 6:
step 601: judging whether the mode is a manual mode, if so, executing step 602, otherwise, executing step 603;
step 602: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, an opening signal of the electric ball valve 3, a closing signal of the electric ball valve 4, a closing signal of a fan of a generator room and a relay disconnection signal of a water jacket heater;
step 603: judging whether the sensor is in fault, if so, executing step 604, otherwise, executing step 605;
step 604: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, an opening signal of the electric ball valve 3, a closing signal of the electric ball valve 4, a closing signal of a fan of a generator room and a suction signal of a relay of a water jacket heater;
step 605: judging whether the temperature of the generator room is less than 25 ℃, if so, executing a step 606, otherwise, executing a step 609;
step 606: judging whether the temperature of the IT machine room is more than or equal to 18 ℃, if so, executing a step 607, otherwise, executing a step 608;
step 607: outputting an opening signal of the electric ball valve 1, a closing signal of the electric ball valve 2, a closing signal of the electric ball valve 3, an opening signal of the electric ball valve 4, a fan opening signal of a generator room and a relay suction signal of a water jacket heater;
step 608: outputting an air conditioner shutdown signal, a generator room fan shutdown signal and a water jacket heater relay actuation signal;
step 609: judging whether the temperature of the generator room is more than 35 ℃, if so, executing step 610, otherwise, executing step 616;
step 610: judging whether the temperature of the IT machine room is more than or equal to 24 ℃, if so, executing a step 611, otherwise, executing a step 612;
step 611: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, an opening signal of the electric ball valve 3, a closing signal of the electric ball valve 4, a closing signal of a fan of a generator room and a relay disconnection signal of a water jacket heater;
step 612: judging whether the temperature of (24-return difference) DEG C (less than IT machine room) is less than 24 ℃, if so, executing step 613, otherwise, executing step 614;
step 613: and keeping the state of the last moment, namely, the system does not output signals.
Step 614: judging whether the temperature of the IT machine room is lower than (24-return difference) DEG C, if so, executing a step 615;
step 615: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, an opening signal of the electric ball valve 3, a closing signal of the electric ball valve 4, a closing signal of a fan of a generator room, a relay of a water jacket heater and a remote shutdown signal;
step 616: judging whether the temperature of the IT machine room is more than or equal to 24 ℃ and whether the water jacket heater operates, if so, executing a step 617, otherwise, executing a step 618;
step 617: outputting a closing signal of the electric ball valve 1, an opening signal of the electric ball valve 2, an opening signal of the electric ball valve 3, a closing signal of the electric ball valve 4, a closing signal of a fan of a generator room and a relay disconnection signal of a water jacket heater;
step 618: and keeping the state of the last moment, namely, the system does not output signals.
Compared with the embodiment, the relative position of the outdoor units in the embodiment does not require that the outdoor unit 1 is higher than the outdoor unit 2, so that the outdoor unit 2 does not need to be moved when the system is transformed, pressure fluctuation is small when the two outdoor units are switched, and a liquid storage tank does not need to be additionally arranged in the system.
Fig. 7 is a schematic structural diagram of a machine room air conditioning system in embodiment 5 of the present invention, and the present embodiment is different from embodiment 3 mainly in the arrangement of an electric ball valve and a check valve. As shown in fig. 7, the system comprises an air conditioner indoor unit and a temperature probe 1 which are positioned in an IT machine room, an outdoor unit 1, a water jacket heater, a controller, a temperature probe 2, a temperature probe 3, a temperature probe 4, an electric ball valve 1 and a check valve 1 which are positioned in a generator room, and an outdoor unit 2, an electric ball valve 2 and a check valve 2 which are positioned outdoors. The same parts as those in embodiment 3 will not be described again.
The controller is respectively connected with the indoor unit, the outdoor unit 1, the outdoor unit 2, the relay of the water jacket heater, the temperature probe 1, the temperature probe 2, the temperature probe 3, the temperature probe 4, the electric ball valve 1 and the electric ball valve 2, and is used for controlling the work of the indoor unit, the outdoor unit 1, the outdoor unit 2, the water jacket heater, the electric ball valve 1 and the electric ball valve 2 and receiving temperature signals collected by the temperature probes.
The indoor unit, the compressor, the electric ball valve 1, the outdoor unit 1, the check valve 1, the liquid storage tank and the expansion valve are sequentially connected in series to form a loop, the electric ball valve 2, the outdoor unit 2 and the check valve 2 are sequentially connected in series and then connected in parallel to two ends of the electric ball valve 1 and two ends of the check valve 1, and the indoor unit, the compressor, the electric ball valve 2, the outdoor unit 2, the check valve 2, the liquid storage tank and the expansion valve are sequentially connected in series to form a loop.
The condenser can be added to the special air conditioning system of the original machine room, the condenser is arranged in the generator room for heat utilization, one compressor system is transformed into two outdoor units corresponding to one compressor system corresponding to one outdoor unit, the two outdoor units are arranged at different positions, one outdoor unit is arranged in the generator room, and the other outdoor unit is arranged outdoors. The two outdoor units are designed in parallel, and an electric ball valve is additionally arranged on a parallel pipeline of each outdoor unit, so that the function of switching the running modes of the two outdoor units is achieved.
When the generator room has a heating demand, the electric ball valve 1 is opened, and the electric ball valve 2 is closed. Refrigerant from the compressor respectively passes through the electric ball valve 1, the outdoor unit 1, the check valve 1, the liquid storage tank, the expansion valve and the indoor unit and then returns to the compressor to complete a cycle.
When the generator room does not have the heating demand, the electric ball valve 1 is closed, and the electric ball valve 2 is opened. Refrigerant from the compressor respectively passes through the electric ball valve 2, the outdoor unit 2, the check valve 2, the liquid storage tank, the expansion valve and the indoor unit and then returns to the compressor to complete a cycle.
The control logic of the controller of this embodiment is similar to that of embodiment 3, and please refer to fig. 4 specifically.
Compared with the embodiment 3, the relative position of the outdoor unit in the embodiment does not require that the outdoor unit 1 is higher than the outdoor unit 2, and the outdoor unit 2 does not need to be moved when the system is modified. Compared with the embodiment 4, the system in the embodiment can reduce two electric ball valves, so that the hidden trouble can be reduced, but the system needs to be added with a liquid storage tank, because the volume of the pipeline of the system passing through the outdoor unit 1 is greatly different from the volume of the pipeline of the system passing through the outdoor unit 2, pressure fluctuation exists during system switching, and the liquid storage tank needs to be added.
Fig. 8 is a schematic structural diagram of a controller according to an embodiment of the present invention. The specific embodiment of the present invention does not limit the specific implementation of the controller.
A controller, comprising: a processing unit and a storage unit;
the storage unit is used for storing at least one executable instruction, and the executable instruction causes the processing unit to execute the control method or the control logic of the machine room air conditioning system in the foregoing embodiment.
As shown in fig. 8, the controller may include: a processing unit (processor)402 and a memory unit (memory) 406. The storage unit is used for storing at least one executable instruction, and the executable instruction causes the processing unit to execute the control method or the control logic of the machine room air conditioning system in the foregoing embodiment.
In particular, processor 402 is configured to execute program 410, and program 410 may include program code comprising computer-executable instructions.
The processor 402 may be a central processing unit CPU or an application Specific Integrated circuit asic or one or more Integrated circuits configured to implement embodiments of the present invention. The network device includes one or more processors, which may be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.
And a memory 406 for storing a program 410. Memory 406 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
An embodiment of the present invention provides a computer-readable storage medium, where the storage medium stores at least one executable instruction, and when the executable instruction is executed on a controller, the controller is caused to execute a control method of a computer room air conditioning system in any method embodiment described above.
The embodiment of the invention provides a control device of a machine room air conditioning system, which is used for executing the control method of the machine room air conditioning system.
Embodiments of the present invention provide a computer program, where the computer program can be called by a processor to enable a network device to execute a control method of a computer room air conditioning system in any of the above method embodiments.
Embodiments of the present invention provide a computer program product, which includes a computer program stored on a computer-readable storage medium, where the computer program includes program instructions that, when executed on a computer, cause the computer to execute the control method of the computer room air conditioning system in any of the above-mentioned method embodiments.
The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.
Claims (10)
1. A machine room air conditioning system, comprising:
the air conditioner comprises an air conditioner indoor unit, a first air conditioner outdoor unit, a second air conditioner outdoor unit, a heater, a controller, a first temperature detection unit, a second temperature detection unit, a first valve and a second valve;
the air conditioner indoor unit and the first temperature detection unit are positioned in a machine room, the first air conditioner outdoor unit, the heater and the second temperature detection unit are positioned in a generator room, and the second air conditioner outdoor unit is positioned outdoors;
the controller is respectively connected with the indoor air conditioner, the first outdoor air conditioner, the second outdoor air conditioner, the heater, the first temperature detection unit, the second temperature detection unit, the first valve and the second valve, and is used for controlling the indoor air conditioner, the first outdoor air conditioner, the second outdoor air conditioner, the heater, the first valve and the second valve to work and receiving temperature signals collected by the first temperature detection unit and the second temperature detection unit;
if the generator room has a heating requirement and the generator room has a refrigerating requirement, the controller is used for controlling the first valve and the fan of the first air-conditioning outdoor unit to be opened, so that the refrigerant of the air-conditioning indoor unit flows into the first air-conditioning outdoor unit through the first valve and returns to the air-conditioning indoor unit to form a cycle;
and if the generator room has no heating requirement, the controller is used for controlling to open the second valve, so that the refrigerant of the indoor air conditioner flows into the second outdoor air conditioner via the second valve and returns to the indoor air conditioner to form a cycle.
2. The system of claim 1, wherein a check valve is connected between the first outdoor unit and the second outdoor unit.
3. The system of claim 2, wherein the indoor unit of air conditioner, the first valve, the first outdoor unit of air conditioner, the check valve and the second outdoor unit of air conditioner are connected in series in sequence to form a loop, and the second valve is connected in parallel to two ends of the first valve and the check valve;
a liquid storage tank is connected between the air conditioner indoor unit and the second air conditioner outdoor unit;
the vertical height of the first air conditioner outdoor unit is greater than that of the second air conditioner outdoor unit.
4. The system of claim 1, wherein the first valve comprises a first sub-valve and a fourth sub-valve, the second valve comprises a second sub-valve and a third sub-valve, the system further comprises a first check valve and a second check valve, the indoor air conditioner, the first sub-valve, the outdoor air conditioner, the check valve, and the fourth sub-valve are sequentially connected in series to form a loop, and the indoor air conditioner, the second sub-valve, the third sub-valve, the outdoor air conditioner, and the second check valve are sequentially connected in series to form a loop.
5. The system of claim 1, further comprising a liquid storage tank, a first check valve and a second check valve, wherein the indoor unit, the first valve, the first outdoor unit, the first check valve, the liquid storage tank and the second outdoor unit are sequentially connected in series to form a loop, and the second valve, the second outdoor unit and the second check valve are connected in series and then connected in parallel to two ends of the first valve and the first check valve.
6. The system according to any one of claims 1 to 5, wherein the indoor unit is an evaporator, the first outdoor unit and the second outdoor unit are condensers, the heater is a water jacket heater, the first temperature detection unit and the second temperature detection unit are temperature sensors or temperature and humidity sensors, and the valve is a shut-off valve.
7. The system of any one of claims 1-5, wherein the valve is a ball valve.
8. The system of any one of claims 1-5, wherein the controller controls the heater to turn on or off by controlling a relay of the heater;
if the generator room has a heating requirement and the generator room has a refrigerating requirement, the controller is also used for controlling the relay of the heater to be sucked so as to enable the heater to work and controlling the second valve to be closed so as to enable the refrigerant of the indoor unit of the air conditioner not to flow into the second outdoor unit of the air conditioner through the second valve;
if the generator room has no heating requirement, the controller is further used for controlling the relay of the heater to be disconnected so as to stop the heater and controlling the first valve to be closed, so that the refrigerant of the air conditioner indoor unit does not flow into the first air conditioner outdoor unit through the first valve.
9. A control method of a machine room air conditioning system according to any one of claims 1 to 8, comprising:
the controller receives a first temperature signal acquired by the first temperature detection unit and a second temperature signal acquired by the second temperature detection unit;
the controller judges whether the temperature of the generator room is greater than a first threshold value according to the first temperature signal and judges whether the temperature of the generator room is less than a second threshold value according to the second temperature signal;
if the temperature of the machine room is greater than the first threshold value and the temperature of the machine room is less than the second threshold value, the machine room has a heating requirement and a refrigerating requirement, and the controller controls to open the first valve and a fan of the first air conditioner outdoor unit, so that the refrigerant of the air conditioner indoor unit flows into the first air conditioner outdoor unit through the first valve and returns to the air conditioner indoor unit to form a cycle;
if the temperature of the generator room is not greater than the second threshold value, the generator room has no heating requirement, and the controller controls to open the second valve, so that the refrigerant of the indoor air conditioner flows into the second outdoor air conditioner via the second valve and returns to the indoor air conditioner to form a cycle.
10. A controller, comprising: a processing unit and a storage unit;
the storage unit is used for storing at least one executable instruction, and the executable instruction causes the processing unit to execute the control method of the machine room air conditioning system according to claim 9.
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| CN202010722783.XA CN113970140A (en) | 2020-07-24 | 2020-07-24 | Machine room air conditioning system and control method and controller thereof |
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| JP2011202833A (en) * | 2010-03-25 | 2011-10-13 | Toshiba Carrier Corp | Air conditioner |
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| CN209944505U (en) * | 2019-05-15 | 2020-01-14 | 湖北兴致天下信息技术有限公司 | Self-adaptive heating device for recycling condensation heat of air conditioner of machine room |
| CN210951732U (en) * | 2019-11-22 | 2020-07-07 | 广东科华乾昇云计算科技有限公司 | Data center diesel generating set control system |
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| JP2011202833A (en) * | 2010-03-25 | 2011-10-13 | Toshiba Carrier Corp | Air conditioner |
| CN204043101U (en) * | 2014-08-06 | 2014-12-24 | 新疆中兴能源有限公司 | A kind of computer-room air conditioning system with heat recovery function |
| CN109357426A (en) * | 2018-09-27 | 2019-02-19 | 克莱门特捷联制冷设备(上海)有限公司 | Combined air-conditioning system and its control method for computer room and room |
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Application publication date: 20220125 |