CN114198872B - Machine room air conditioner, operation control method and device of machine room air conditioner - Google Patents

Machine room air conditioner, operation control method and device of machine room air conditioner Download PDF

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Publication number
CN114198872B
CN114198872B CN202010978104.5A CN202010978104A CN114198872B CN 114198872 B CN114198872 B CN 114198872B CN 202010978104 A CN202010978104 A CN 202010978104A CN 114198872 B CN114198872 B CN 114198872B
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China
Prior art keywords
compressor
water
temperature
refrigerating system
fluorine pump
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CN202010978104.5A
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Chinese (zh)
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CN114198872A (en
Inventor
腾杰
王瑞鑫
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Vertiv Tech Co Ltd
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Vertiv Tech Co Ltd
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Priority to CN202010978104.5A priority Critical patent/CN114198872B/en
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Classifications

    • 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
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • 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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/50—Load
    • 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]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a machine room air conditioner, an operation control method and a device of the machine room air conditioner, wherein the machine room air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises an evaporator, a compressor and a first one-way valve, the outdoor unit comprises a condenser, a water-cooled heat exchanger, a fluorine pump and a second one-way valve, and the condenser and the water-cooled heat exchanger form a heat dissipation assembly; the liquid outlet of the evaporator is connected with the liquid inlet of the compressor and the liquid inlet of the first one-way valve, the liquid outlet of the compressor and the liquid outlet of the first one-way valve are connected with the liquid inlet of the heat radiating component, the liquid outlet of the heat radiating component is connected with the liquid inlet of the fluorine pump and the liquid inlet of the second one-way valve, and the liquid outlet of the fluorine pump and the liquid outlet of the second one-way valve are connected with the liquid inlet of the evaporator; the refrigerating function of the water-cooling heat exchanger and the refrigerating function of the condenser are independently controllable, and the water inlet and the water outlet of the water-cooling heat exchanger are used for being connected with a chilled water unit. The air conditioner of the machine room is simple in structure, can improve energy efficiency of the machine unit, and can ensure safety of the machine room.

Description

Machine room air conditioner, operation control method and device of machine room air conditioner
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a machine room air conditioner, and an operation control method and device of the machine room air conditioner.
Background
The air conditioner is a mechanical device capable of adjusting the temperature and the humidity in a certain space, wherein the machine room air conditioner is mainly used for the environment of a computer room, so that the normal and efficient use of a computer server is ensured. Different from the common household air conditioner which has requirements on human comfort, the machine room air conditioner is used in a closed space integrated with a large number of microcircuits, electrical elements and control equipment, and the requirements of the precise elements on temperature and humidity are high, so that the machine room air conditioner is required to run reliably all the year round.
Because the heat dissipation capacity of the server in the data machine room is extremely large, the machine room air conditioner needs to consume a large amount of electric energy when processing the heat load, so that the reduction of the energy consumption of the machine room air conditioner is an important direction of long-term technical pursuit.
At present, a chilled water air conditioner is a popular research direction, namely, low-temperature chilled water is adopted to take away the heat load of a computer room through a water-cooling heat exchanger, compared with a conventional compressor evaporation refrigeration system, the mode reduces power consumption devices, and the unit power is greatly reduced under the condition of the same heat exchange quantity, but the mode has the defect that water can be introduced into the computer room, and once leakage, pipe explosion and other phenomena occur, the risks of short circuit, burning and the like of a computer server can be caused.
In the area with lower outdoor temperature, the air-cooled air conditioner with the fluorine pump is also in a hot direction, the refrigerating system still exchanges heat through the refrigerant, but the compressor with huge power consumption is replaced by the fluorine pump, the refrigerant is driven to flow to take away indoor heat and then radiates heat through cold air outside the greenhouse, and the refrigerating efficiency is still high in this way but limited by the outdoor environment temperature.
In order to ensure the reliability of the refrigeration mode and low energy consumption, the machine room can select two refrigeration modes of air cooling and chilled water to work in combination to be mutually backed up, namely a double-cold-source air conditioning system is adopted, the conventional indoor unit of the double-cold-source system generally comprises two sets of heat exchange coils, the pipeline design is complex, and meanwhile, the risk of water entering the machine room still exists.
Disclosure of Invention
The invention provides a machine room air conditioner, and an operation control method and device of the machine room air conditioner, wherein the machine room air conditioner is simple in structure, easy to maintain and reform, capable of improving energy efficiency of a machine set, capable of avoiding chilled water from being introduced into the machine room, and capable of guaranteeing safety of the machine room.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the machine room air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises an evaporator, a compressor and a first one-way valve, the outdoor unit comprises a condenser, a water-cooled heat exchanger, a fluorine pump and a second one-way valve, and the condenser and the water-cooled heat exchanger form a heat dissipation assembly; wherein, the liquid crystal display device comprises a liquid crystal display device,
the liquid outlet of the evaporator is connected with the liquid inlet of the compressor and the liquid inlet of the first one-way valve through pipelines, the liquid outlet of the compressor and the liquid outlet of the first one-way valve are connected with the liquid inlet of the heat radiating component through pipelines, the liquid outlet of the heat radiating component is connected with the liquid inlet of the fluorine pump and the liquid inlet of the second one-way valve through pipelines, and the liquid outlet of the fluorine pump and the liquid outlet of the second one-way valve are connected with the liquid inlet of the evaporator through pipelines;
In the heat dissipation assembly, the refrigeration function of the water-cooling heat exchanger and the refrigeration function of the condenser are independently controllable, and the water inlet and the water outlet of the water-cooling heat exchanger are connected with a chilled water unit.
The indoor unit comprises an evaporator, a compressor and a first one-way valve, the outdoor unit comprises a condenser, a water-cooling heat exchanger, a fluorine pump and a second one-way valve, and the condenser and the water-cooling heat exchanger form a heat dissipation assembly; the evaporator, the compressor, the heat dissipation assembly and the fluorine pump are sequentially connected to form a loop of refrigerant circulation, the first one-way valve is arranged in parallel with the compressor, the second one-way valve is arranged in parallel with the fluorine pump, the water-cooled heat exchanger in the heat dissipation assembly can be connected with the chilled water unit, and the refrigeration function of the water-cooled heat exchanger and the refrigeration function of the condenser are independently controllable. According to the machine room air conditioner, the condenser and the water-cooling heat exchanger are simultaneously arranged through the outdoor unit, and only one evaporator is used indoors, so that the air conditioner unit is provided with a refrigerating water refrigerating source and an air-cooling refrigerating source, and the machine room air conditioner is simple in structure and easy to maintain and reform; refrigerating of the chilled water can be realized through a water-cooling heat exchanger in the outdoor unit, so that the chilled water can be prevented from being introduced into the machine room, and the safety of the machine room is ensured; because the refrigeration function of the water-cooling heat exchanger and the refrigeration function of the condenser are independently controllable, the water-cooling heat exchanger can supplement heat dissipation, the condensation temperature of the refrigerant on the condenser is reduced, or the water-cooling heat exchanger can independently dissipate heat, the energy consumption of the air conditioning unit is reduced, the energy efficiency of the air conditioning unit is improved, and under the condition that the condenser cannot be cleaned and the like, the water-cooling heat exchanger dissipates heat, so that the refrigeration capacity of the air conditioner is not affected.
In one possible implementation manner, the indoor unit further comprises an expansion valve, the expansion valve is arranged on the pipeline connecting the fluorine pump and the second one-way valve with the evaporator, a liquid outlet of the fluorine pump and a liquid outlet of the second one-way valve are connected with a liquid inlet of the expansion valve through pipelines, and a liquid outlet of the expansion valve is connected with a liquid inlet of the evaporator through pipelines.
In one possible implementation manner, the liquid outlet of the compressor and the liquid outlet of the first one-way valve are connected with the liquid inlet of the condenser through a pipeline, the liquid outlet of the condenser is connected with the liquid inlet of the water-cooled heat exchanger through a pipeline, and the liquid outlet of the water-cooled heat exchanger is connected with the liquid inlet of the fluorine pump and the liquid inlet of the second one-way valve through a pipeline.
In one possible implementation manner, the liquid outlet of the compressor and the liquid outlet of the first one-way valve are connected with the liquid inlet of the water-cooled heat exchanger and the liquid inlet of the condenser through pipelines, and the liquid outlet of the water-cooled heat exchanger and the liquid outlet of the condenser are connected with the liquid inlet of the fluorine pump and the liquid inlet of the second one-way valve through pipelines.
In one possible implementation manner, a first stop valve is arranged on a pipeline connected with the compressor and the first one-way valve of the water-cooled heat exchanger, and a second stop valve is arranged on a pipeline connected with the compressor and the first one-way valve of the condenser.
In one possible implementation manner, a liquid storage tank is arranged on a pipeline, wherein the pipeline is connected with the fluorine pump and the first one-way valve, of the heat radiating component.
In one possible implementation manner, the outdoor unit further comprises a third one-way valve, the liquid outlet of the heat dissipation assembly is connected with the liquid inlet of the third one-way valve through a pipeline, and the liquid outlet of the third one-way valve is connected with the liquid inlet of the evaporator through a pipeline.
In one possible implementation manner, the outdoor unit further comprises a first electromagnetic valve arranged on a pipeline connected with the fluorine pump and the evaporator and a fourth one-way valve arranged on a pipeline connected with the compressor and the first one-way valve and the heat dissipation assembly, wherein a liquid outlet of the compressor and a liquid outlet of the first one-way valve are connected with a liquid inlet of the fourth one-way valve through pipelines, and a liquid outlet of the fourth one-way valve is connected with a liquid inlet of the heat dissipation assembly through pipelines.
In one possible implementation manner, the indoor unit further comprises a second electromagnetic valve arranged on a pipeline connected with the compressor and the evaporator, and a fifth one-way valve arranged on a pipeline connected with the compressor and the heat dissipation assembly, wherein a liquid outlet of the compressor is connected with a liquid inlet of the fifth one-way valve through a pipeline, and a liquid outlet of the fifth one-way valve is connected with a liquid inlet of the heat dissipation assembly through a pipeline.
In one possible embodiment, the method further comprises:
the indoor temperature detection module is used for detecting indoor temperature;
the water temperature detection module is used for detecting the inlet water temperature of chilled water at the water inlet;
the controller is in signal connection with the fan of the evaporator, the compressor, the fan of the condenser, the fluorine pump, the chilled water unit, the outdoor temperature detection module and the water temperature detection module; the controller is used for:
when the difference value between the indoor temperature and the preset room temperature is larger than a first threshold value, controlling a fan of the evaporator to be started;
acquiring the inlet water temperature of chilled water at the water inlet;
when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
In one possible embodiment, after obtaining the inlet water temperature of the chilled water at the inlet, the controller is further configured to:
when the temperature of the inlet water is not less than the preset water temperature, the operation of the compressor, the operation of the fan of the condenser and the non-operation of the fluorine pump are controlled so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system.
In one possible embodiment, when the temperature of the incoming water is less than a preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, the fan of the condenser is not operated, so as to start the chilled water refrigeration system, and the controller is further used for:
when the difference between the indoor temperature and the preset temperature is larger than a second threshold value, the fluorine pump is controlled to be turned off, the compressor is controlled to operate, and the fan of the condenser is controlled to operate, so that the refrigerating system is switched to a double-cold-source refrigerating system consisting of the refrigerating system of chilled water and the refrigerating system of air-cooled compressor.
In one possible implementation manner, when the temperature of the inlet water is not less than the preset water temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is started, and the controller is further used for:
When the ratio of the refrigerating capacity of the chilled water refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a first preset ratio, the compressor is controlled to be closed, the fan of the condenser is controlled to be closed, and the fluorine pump is controlled to operate, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is switched into the chilled water refrigerating system.
In one possible embodiment, the outdoor temperature detecting module is further configured to detect an outdoor temperature; before obtaining the inlet temperature of chilled water at the water inlet, the controller is further configured to:
acquiring the running condition of a chilled water unit;
when the chilled water unit normally operates, acquiring the inlet water temperature of chilled water at the water inlet;
when the chilled water unit is not operating, an outdoor temperature is obtained.
In one possible embodiment, after acquiring the outdoor temperature when the chilled water unit is not operating, the controller is configured to:
when the outdoor temperature is higher than the preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated so as to start the air-cooled compressor refrigerating system.
In one possible embodiment, after acquiring the outdoor temperature when the chilled water unit is not operating, the controller is further configured to:
When the outdoor temperature is not higher than the preset air temperature, the operation of the fluorine pump, the operation of the fan of the condenser and the non-operation of the compressor are controlled so as to start the air-cooled fluorine pump refrigerating system.
In one possible embodiment, when the outdoor temperature is not higher than the preset air temperature, the fluorine pump is controlled to operate, the fan of the condenser is controlled to operate, and the compressor is not controlled to operate, so that the air-cooled fluorine pump refrigeration system is started, and the controller is further used for:
and when the difference value between the indoor temperature and the preset temperature is larger than a third threshold value, the fluorine pump is controlled to be turned off, and the compressor is controlled to operate so as to be switched from the air-cooled fluorine pump refrigerating system to the air-cooled compressor refrigerating system.
In one possible embodiment, when the outdoor temperature is higher than a preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated, so as to start the air-cooled compressor refrigeration system, and the controller is further used for:
when the ratio of the refrigerating capacity of the air-cooled fluorine pump refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a second preset ratio, the compressor is controlled to be closed, and the fluorine pump is controlled to operate so as to be switched to the air-cooled fluorine pump system from the air-cooled compressor refrigerating system.
Based on the same inventive concept, the embodiment of the invention also provides an operation control method of the machine room air conditioner, comprising the following steps:
When the difference value between the indoor temperature and the preset room temperature is larger than a first threshold value, controlling a fan of the evaporator to be started;
acquiring the inlet water temperature of chilled water at the water inlet;
when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
In the embodiment of the invention, the water inlet temperature of the chilled water at the water inlet is obtained, and when the water inlet temperature is smaller than the preset water temperature, the chilled water refrigerating system is started, and the independent heat dissipation of the water cooling heat exchanger is realized, so that the energy consumption of the compressor can be reduced, the energy consumption of the air conditioning unit is further reduced, and the energy efficiency of the air conditioning unit is improved.
Based on the same inventive concept, the embodiment of the invention also provides an operation control device of the machine room air conditioner, comprising:
the first control unit is used for controlling the fan of the evaporator to be started when the difference value between the indoor temperature and the preset room temperature is larger than a first threshold value;
the acquisition unit is used for acquiring the inlet water temperature of the chilled water at the water inlet;
a second control unit for:
when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
In the embodiment of the invention, the water inlet temperature of the chilled water at the water inlet is obtained, and when the water inlet temperature is smaller than the preset water temperature, the chilled water refrigerating system is started, and the independent heat dissipation of the water cooling heat exchanger is realized, so that the energy consumption of the compressor can be reduced, the energy consumption of the air conditioning unit is further reduced, and the energy efficiency of the air conditioning unit is improved.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner in a machine room according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating structural comparison of an air conditioner in a machine room according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another air conditioner in a machine room according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another air conditioner in a machine room according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another air conditioner in a machine room according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another air conditioner in a machine room according to an embodiment of the present invention;
fig. 7 is a schematic operation diagram of an air conditioner in a machine room according to an embodiment of the present invention;
fig. 8 is a flowchart of a method for controlling operation of an air conditioner in a machine room according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an operation control device of an air conditioner in a machine room according to an embodiment of the present invention.
Icon:
1-an indoor unit; 11-an evaporator; 111-fans of the evaporator; 12-a compressor; 13-a first one-way valve; 14-an expansion valve; 15-a second solenoid valve; 16-a fifth one-way valve; 2-an outdoor unit; 21-a condenser; 211-fans of the condenser; 212-a second shut-off valve; 22-a water-cooled heat exchanger; 221-chilled water lines; 222-a first shut-off valve; a 23-fluorine pump; 24-a second one-way valve; 25-a liquid storage tank; 26-a third one-way valve; 27-a first solenoid valve; 28-a fourth one-way valve; 100-a first control unit; 200-an acquisition unit; 300-a second control unit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides an air conditioner for a machine room, which includes an indoor unit 1 and an outdoor unit 2, wherein the indoor unit 1 includes an evaporator 11, a compressor 12 and a first check valve 13, the outdoor unit 2 includes a condenser 21, a water-cooled heat exchanger 22, a fluorine pump 23 and a second check valve 24, and the condenser 21 and the water-cooled heat exchanger 22 form a heat dissipation assembly; wherein, the liquid crystal display device comprises a liquid crystal display device,
The liquid outlet of the evaporator 11 is connected with the liquid inlet of the compressor 12 and the liquid inlet of the first one-way valve 13 through pipelines, the liquid outlet of the compressor 12 and the liquid outlet of the first one-way valve 13 are connected with the liquid inlet of the heat radiation component through pipelines, the liquid outlet of the heat radiation component is connected with the liquid inlet of the fluorine pump 23 and the liquid inlet of the second one-way valve 24 through pipelines, and the liquid outlet of the fluorine pump 23 and the liquid outlet of the second one-way valve 24 are connected with the liquid inlet of the evaporator 11 through pipelines;
in the heat dissipation assembly, the refrigeration function of the water-cooling heat exchanger 22 and the refrigeration function of the condenser 21 are independently controllable, and the water inlet and the water outlet of the water-cooling heat exchanger 22 are used for being connected with a chilled water unit.
The machine room air conditioner provided by the embodiment of the invention comprises an indoor unit 1 and an outdoor unit 2, wherein the indoor unit 1 comprises an evaporator 11, a compressor 12 and a first one-way valve 13, the outdoor unit 2 comprises a condenser 21, a water-cooled heat exchanger 22, a fluorine pump 23 and a second one-way valve 24, and the condenser 21 and the water-cooled heat exchanger 22 form a heat dissipation assembly; as shown in fig. 1, the evaporator 11, the compressor 12, the heat dissipation assembly, and the fluorine pump 23 are sequentially connected to form a loop of a refrigerant cycle, the first check valve 13 is disposed in parallel with the compressor 12, the second check valve 24 is disposed in parallel with the fluorine pump 23, the water-cooled heat exchanger 22 in the heat dissipation assembly can be connected with a chilled water unit, and the refrigeration function of the water-cooled heat exchanger 22 and the refrigeration function of the condenser 21 are independently controllable. The air conditioner in the machine room is provided with the condenser 21 and the water-cooling heat exchanger 22 through the outdoor unit 2, and only one evaporator 11 is used indoors, so that the air conditioner unit is provided with a refrigerating source for refrigerating water and a refrigerating source for air-cooling, and the air conditioner unit is simple in structure and easy to maintain and reform; refrigerating of the chilled water can be realized through the water-cooling heat exchanger 22 in the outdoor unit 2, so that the chilled water is prevented from being introduced into the machine room, and the safety of the machine room is ensured; because the refrigeration function of the water-cooling heat exchanger 22 and the refrigeration function of the condenser 21 are independently controllable, the heat dissipation can be supplemented through the water-cooling heat exchanger 22, so that the condensation temperature of the refrigerant on the condenser 21 can be reduced, or the energy consumption of the air conditioning unit can be reduced through the independent heat dissipation of the water-cooling heat exchanger 22, the energy efficiency of the air conditioning unit can be improved, and the heat dissipation through the water-cooling heat exchanger 22 does not affect the refrigeration capacity of the air conditioner under the condition that the condenser 21 cannot be cleaned and the like.
Specifically, as shown in fig. 2, the machine room air conditioner provided in the embodiment of the invention can be formed by modifying a single-cold-source machine room because few pipelines are added compared with an air cooling system, when the machine room is configured as a conventional air cooling system, if the environment is special and natural cold sources exist, for example, outdoor air temperature is lower in a quite long period of time in winter, the machine room is close to a river and lake and has underground cold water, etc., device modification can be added, the natural cold sources are fully utilized, energy consumption is reduced, the added part comprises pipelines connected by a dotted line in fig. 2, the indoor unit 1 is added with a bypass pipeline of the compressor 12 and a first one-way valve 13 on a bypass pipeline, and the outdoor unit 2 is added with a fluorine pump 23, a bypass pipeline of the fluorine pump 23, a second one-way valve 24 on a bypass pipeline of the fluorine pump 23, a water-cooling heat exchanger 22 and related pipelines. Wherein the water-cooled heat exchanger 22 is connected with a chilled water unit through a chilled water line 221. The chilled water line 221 has a water valve, which may be a three-way valve for regulating the flow of chilled water if the chilled water unit is supplying water to the water heat exchanger 22 at a fixed frequency.
Specifically, the evaporator 11 and the condenser 21 may be in the form of a fin-tube heat exchanger or a microchannel heat exchanger, etc., and the water-cooled heat exchanger 22 may be a shell-type heat exchanger or other water-fluorine heat exchanger. While chilled water flowing through the water cooled heat exchanger 22 may be replaced with other refrigerants, such as glycol solutions, R410A, R22 or other refrigerants may be used.
The machine room air conditioner can form various refrigeration systems due to the two cold sources of chilled water refrigeration and air-cooled refrigeration. For example, a double-cold-source refrigerating system, an air-cooled fluorine pump refrigerating system and an air-cooled compressor refrigerating system which are formed by a chilled water refrigerating system, a chilled water refrigerating system and an air-cooled compressor refrigerating system can be formed.
Specifically, when the machine room air conditioner radiates heat through the chilled water refrigeration system, the chilled water unit is operated, the fluorine pump 23 is operated, the compressor 12 is not operated, and the fan 211 of the condenser is not operated, the refrigerant flows through the indoor evaporator 11 to absorb the heat of the machine room, the refrigerant gas is then sent to the water-cooled heat exchanger 22 of the radiating assembly through the bypass pipeline of the compressor 12, the refrigerant vapor and the low-temperature chilled water are changed into refrigerant liquid after heat exchange, the refrigerant liquid is driven by the fluorine pump 23 to enter the evaporator 11 to circularly absorb heat, and the refrigerant is driven by the fluorine pump 23 to circularly exchange heat in the whole process. The opening of the water valve can be adjusted according to the temperature of water entering and exiting the water-cooling heat exchanger 22, and the lift of the fluorine pump 23 can be adjusted according to the target condensing pressure.
Specifically, when the machine room air conditioner radiates heat through the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system, the chilled water unit is operated, the compressor 12 is operated, the fan 211 of the condenser is operated, the fluorine pump 23 is not operated, the refrigerant flows through the evaporator 11 in the indoor unit to absorb the heat of the machine room to become refrigerant gas, then enters the compressor 12 to compress, is discharged into high-temperature high-pressure gas to enter the condenser 21, the refrigerant vapor exchanges heat with the outdoor air through the condenser 21, flows into the water-cooled heat exchanger 22 to exchange heat with the chilled water to become refrigerant liquid, and then flows through the bypass pipeline of the fluorine pump 23, namely the branch where the second one-way valve 24 is located, to enter the evaporator 11 of the indoor unit 1 to circularly absorb heat. At this time, the opening degree of the water valve on the chilled water line 221 may be the maximum, the rotation speed of the compressor 12 may be adjusted according to the cooling demand of the indoor unit 1, and the rotation speed of the fan 211 of the condenser may be adjusted according to the target condensing pressure.
Specifically, when the machine room air conditioner radiates heat through the air-cooled compressor refrigeration system, the chilled water unit does not operate, the compressor 12 operates, the fan 211 of the condenser operates, the fluorine pump 23 does not operate, the refrigerant flows through the indoor evaporator 11 to absorb the heat of the machine room, the refrigerant gas enters the compressor 12 to be compressed, the high-temperature high-pressure gas is discharged to enter the condenser 21, the refrigerant vapor is changed into high-pressure medium-temperature liquid after exchanging heat with the outdoor air through the condenser 21, and the high-temperature high-pressure medium-temperature liquid flows through the bypass pipeline of the fluorine pump 23 to enter the indoor unit 1 and flows into the evaporator 11 to circularly absorb heat. At this time, the rotation speed of the compressor 12 may be adjusted according to the cooling requirement of the indoor unit 1, and the rotation speed of the fan 211 of the condenser may be adjusted according to the target condensing pressure.
Specifically, when the machine room air conditioner radiates heat through the air-cooled fluorine pump refrigerating system, the chilled water unit does not operate, the fluorine pump 23 operates, the fan 211 of the condenser operates, the compressor 12 does not operate, the refrigerant flows through the indoor evaporator 11 to absorb the heat of the machine room, the refrigerant gas flows through the bypass pipeline of the compressor 12 and enters the condenser 21, the refrigerant vapor is changed into liquid after exchanging heat with the outdoor air through the condenser 21, and the refrigerant liquid is driven by the fluorine pump 23 to enter the evaporator 11 of the indoor unit 1 to circularly absorb heat. At this time, the lift of the fluorine pump 23 may be adjusted according to the target lift, and the rotation speed of the blower 211 of the condenser may be adjusted according to the target condensing pressure.
In the machine room air conditioner provided in the embodiment of the invention, specifically, as shown in fig. 1, the indoor unit 1 further includes an expansion valve 14, the expansion valve 14 is disposed on a pipeline where the fluorine pump 23 and the second one-way valve 24 are connected with the evaporator 11, a liquid outlet of the fluorine pump 23 and a liquid outlet of the second one-way valve 24 are connected with a liquid inlet of the expansion valve 14 through a pipeline, and a liquid outlet of the expansion valve 14 is connected with a liquid inlet of the evaporator 11 through a pipeline. The expansion valve 14 controls the valve flow through the superheat change of the liquid outlet of the evaporator 11, and prevents the underutilization of the area of the evaporator 11 and the knocking phenomenon. Specifically, the expansion valve 14 may be an electronic expansion valve 14 or a thermal expansion valve 14.
In the embodiment of the invention, the condenser 21 and the water-cooling heat exchanger 22 in the heat dissipation assembly can be arranged in series, the condenser 21 and the water-cooling heat exchanger 22 in the heat dissipation assembly can be independently or simultaneously operated according to the using site conditions, and the refrigerating capacity of the system is not affected under the condition that a certain system cannot work due to maintenance of the chilled water unit or cleaning of the condenser. As shown in fig. 1, namely, the liquid outlet of the compressor 12 and the liquid outlet of the first check valve 13 are connected with the liquid inlet of the condenser 21 through pipelines, the liquid outlet of the condenser 21 is connected with the liquid inlet of the water-cooled heat exchanger 22 through pipelines, and the liquid outlet of the water-cooled heat exchanger 22 is connected with the liquid inlet of the fluorine pump 23 and the liquid inlet of the second check valve 24 through pipelines. When the condenser 21 and the water-cooled heat exchanger 22 are arranged in series, the refrigerating function of the condenser 21 and the refrigerating function of the water-cooled heat exchanger 22 are independently controllable, and when the fan 211 of the condenser is started, the condenser 21 can make the refrigerant exchange heat with the outdoor air, and when the chilled water unit connected with the water-cooled heat exchanger 22 is in normal operation, the water-cooled heat exchanger 22 can make the refrigerant exchange heat with the chilled water. Compared with a conventional air-cooled refrigerating system, the condenser 21 can be matched with a small model, and the chilled water refrigerating system can be started to supplement heat dissipation when the outdoor temperature is higher, so that the condensing temperature is reduced, and the energy efficiency of an air conditioning unit is improved. When the condenser 21 and the water-cooled heat exchanger 22 are used for simultaneously refrigerating, high-temperature and high-pressure gas discharged by the compressor 12 enters the condenser 21, and the refrigerant steam can be changed into a high-pressure medium-temperature two-phase mixture after heat exchange with outdoor air through the condenser 21, and then flows into the water-cooled heat exchanger 22 to be converted into refrigerant liquid again by heat exchange with chilled water.
In this embodiment of the present invention, optionally, the condenser 21 and the water-cooled heat exchanger 22 in the heat dissipation assembly may also be disposed in parallel, as shown in fig. 3, that is, the liquid outlet of the compressor 12 and the liquid outlet of the first check valve 13 are connected with the liquid inlet of the water-cooled heat exchanger 22 and the liquid inlet of the condenser 21 through pipelines, and the liquid outlet of the water-cooled heat exchanger 22 and the liquid outlet of the condenser 21 are connected with the liquid inlet of the fluorine pump 23 and the liquid inlet of the second check valve 24 through pipelines.
Specifically, in order to realize that the respective refrigeration functions of the condenser 21 and the water-cooled heat exchanger 22 are individually controllable when they are arranged in parallel, a first stop valve 222 is disposed on a pipeline connecting the water-cooled heat exchanger 22 with the compressor 12 and the first check valve 13, and a second stop valve 212 is disposed on a pipeline connecting the condenser 21 with the compressor 12 and the first check valve 13. When only the chilled water refrigeration system is started, the first stop valve 222 needs to be controlled to be opened, the second stop valve 212 needs to be controlled to be closed, and the refrigerant only flows through the water-cooled heat exchanger 22 and does not flow through the condenser 21; when only the air-cooled refrigeration system is started, the first stop valve 222 needs to be controlled to be closed, the second stop valve 212 needs to be controlled to be opened, and the refrigerant only flows through the condenser 21 and does not flow through the water-cooled heat exchanger 22; when the chilled water refrigeration system and the air-cooled refrigeration system are started simultaneously, the first stop valve 222 and the second stop valve 212 need to be controlled to be opened simultaneously.
In the machine room air conditioner provided in the embodiment of the invention, when the outdoor unit 2 has a larger negative drop than the indoor unit 1, or when the air conditioner operates under a larger change of environmental working conditions, as shown in fig. 4, a liquid storage tank 25 can be arranged on a pipeline of the heat dissipation component connected with the fluorine pump 23 and the first one-way valve 13, so that the operation stability of the refrigeration system can be increased.
Specifically, the outdoor unit 2 further includes a third check valve 26, the liquid outlet of the heat dissipating component is connected to the liquid inlet of the third check valve 26 through a pipeline, and the liquid outlet of the third check valve 26 is connected to the liquid inlet of the evaporator 11 through a pipeline, so that the refrigerant can flow through the pipeline where the third check valve 26 is located when the liquid storage tank 25 is not needed.
In the machine room air conditioner provided in the embodiment of the invention, when the installation position of the indoor and outdoor units is far provided with a long connecting pipe or a large positive drop, as shown in fig. 5, the outdoor unit 2 may further include a first electromagnetic valve 27 disposed on a pipeline where the fluorine pump 23 and the second one-way valve 24 are connected with the evaporator 11, and a fourth one-way valve 28 disposed on a pipeline where the compressor 12 and the first one-way valve 13 are connected with the heat dissipation component, specifically, a liquid outlet of the compressor 12 and a liquid outlet of the first one-way valve 13 are connected with a liquid inlet of the fourth one-way valve 28 through a pipeline, and a liquid outlet of the fourth one-way valve 28 is connected with a liquid inlet of the heat dissipation component through a pipeline. The first electromagnetic valve 27 and the fourth one-way valve 28 are added at two ends of the indoor unit 1, so that the running safety of the system can be ensured.
In the machine room air conditioner provided in the embodiment of the invention, as shown in fig. 6, the indoor unit 1 may further include a second electromagnetic valve 15 disposed on a pipeline where the compressor 12 is connected with the evaporator 11, and a fifth one-way valve 16 disposed on a pipeline where the compressor 12 is connected with the heat dissipation component, where a liquid outlet of the compressor 12 is connected with a liquid inlet of the fifth one-way valve 16 through a pipeline, and a liquid outlet of the fifth one-way valve 16 is connected with a liquid inlet of the heat dissipation component through a pipeline. The second electromagnetic valve 15 can be added at one end of the liquid inlet of the compressor 12, the fifth one-way valve 16 can be added at one end of the liquid outlet of the compressor 12, the second electromagnetic valve 15 is closed when the compressor 12 is not started, at this time, the circulation system of the refrigerant can reduce or cancel the set superheat degree of the expansion valve 14, and the energy efficiency is improved.
In one possible implementation manner, the machine room air conditioner further includes:
the indoor temperature detection module is used for detecting indoor temperature;
the water temperature detection module is used for detecting the inlet water temperature of chilled water at the water inlet;
the controller is in signal connection with the fan 111 of the evaporator, the compressor 12, the fan 211 of the condenser, the fluorine pump 23, the chilled water unit, the outdoor temperature detection module and the water temperature detection module; the controller is used for:
When the difference between the indoor temperature and the preset room temperature is larger than a first threshold value, controlling the fan 111 of the evaporator to be started;
acquiring the inlet water temperature of chilled water at the water inlet;
when the inlet water temperature is less than the preset water temperature, the fluorine pump 23 is controlled to operate, the compressor 12 is not operated, and the fan 211 of the condenser is not operated so as to start the chilled water refrigeration system.
In the machine room air conditioner provided by the embodiment of the invention, the water inlet temperature of the chilled water at the water inlet is obtained, and when the water inlet temperature is smaller than the preset water temperature, the chilled water refrigerating system is started, and the independent heat dissipation of the water cooling heat exchanger 22 is realized, so that the energy consumption of the compressor can be reduced, the energy consumption of the air conditioning unit is further reduced, and the energy efficiency of the air conditioning unit is improved.
In one possible embodiment, after obtaining the inlet water temperature of the chilled water at the inlet, the controller is further configured to:
when the temperature of the inlet water is not less than the preset water temperature, the compressor 12 is controlled to operate, the fan 211 of the condenser is controlled to operate, and the fluorine pump 23 is not operated, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is started.
In the machine room air conditioner provided by the embodiment of the invention, the inlet water temperature of chilled water at the water inlet is obtained, when the inlet water temperature is smaller than the preset water temperature, the chilled water refrigerating system is started, and the independent heat dissipation can be realized through the water cooling heat exchanger 22, or when the inlet water temperature is not smaller than the preset water temperature, the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air cooling compressor refrigerating system is started, and the auxiliary heat dissipation can be realized through the water cooling heat exchanger 22, and according to different inlet water temperatures, the independent heat dissipation or the supplementary heat dissipation can be realized through the water cooling heat exchanger, so that the energy consumption of the compressor can be reduced, the energy consumption of an air conditioning unit can be further reduced, and the energy efficiency of the air conditioning unit can be improved. The specific values of the preset room temperature, the first threshold value and the preset water temperature are not limited, and can be set by a user according to experimental tests or experience.
In one specific embodiment, when the inlet water temperature is less than the preset water temperature, the fluorine pump 23 is controlled to operate, the compressor 12 is not operated, the condenser fan 211 is not operated to start the chilled water refrigeration system, and the controller is further configured to:
when the difference between the indoor temperature and the preset temperature is greater than the second threshold, the fluorine pump 23 is controlled to be turned off, the compressor 12 is operated, and the fan 211 of the condenser is operated, so that the chilled water refrigeration system is switched to a double-cold-source refrigeration system consisting of the chilled water refrigeration system and the air-cooled compressor refrigeration system.
In the machine room air conditioner provided by the embodiment of the invention, in the process of radiating through the chilled water refrigerating system, when the difference between the indoor temperature and the preset temperature is larger than the second threshold value due to the change of the indoor environment, the chilled water refrigerating system is controlled to be switched to the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system, the most energy-saving operation mode can be intelligently selected when the environment is changed, the reliability and the stability of the air conditioner refrigerating system can be ensured, and the energy efficiency of an air conditioning unit is improved. The specific value of the second threshold is not limited, and may be set by the user according to a trial test or experience.
In a specific embodiment, when the temperature of the incoming water is not less than the preset water temperature, the compressor 12 is controlled to operate, the fan 211 of the condenser is controlled to operate, and the fluorine pump 23 is not operated, so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system, and the controller is further used for:
when the ratio of the refrigerating capacity of the chilled water refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a first preset ratio, the compressor 12 is controlled to be turned off, the fan 211 of the condenser is controlled to be turned off, and the fluorine pump 23 is operated, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is switched into the chilled water refrigerating system.
In the machine room air conditioner provided by the embodiment of the invention, in the process of radiating through the double-cold-source refrigerating system formed by the chilled water refrigerating system and the air-cooled compressor refrigerating system, when the ratio of the refrigerating capacity of the chilled water refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than the first preset ratio, the double-cold-source refrigerating system formed by the chilled water refrigerating system and the air-cooled compressor refrigerating system is controlled to be switched to the chilled water refrigerating system, the most energy-saving operation mode can be intelligently selected when the environment changes, the reliability and the stability of the refrigerating system can be ensured, and the energy efficiency of an air conditioner unit can be improved. The refrigerating capacity of the refrigerating system of the chilled water is the theoretical refrigerating capacity of the chilled water calculated by the control algorithm, and the refrigerating capacity of the refrigerating system of the air-cooled compressor is the theoretical refrigerating capacity of the compressor calculated by the control algorithm. Specifically, the first preset ratio may be greater than 1, which is not limited herein, and may be set by the user according to experimental tests or experience.
In a specific embodiment, the outdoor temperature detecting module is further included for detecting an outdoor temperature; before obtaining the inlet temperature of chilled water at the water inlet, the controller is further configured to:
acquiring the running condition of a chilled water unit;
when the chilled water unit normally operates, acquiring the inlet water temperature of chilled water at the water inlet;
when the chilled water unit is not operating, an outdoor temperature is obtained.
In the machine room air conditioner provided by the embodiment of the invention, before the inlet water temperature of the cooling water at the water inlet is obtained, the running condition of the chilled water unit can be obtained first, when the chilled water unit normally runs, the inlet water temperature of the chilled water is obtained when the chilled water flows in, the cooling water can be cooled through the chilled water refrigerating system, when the chilled water does not run, the cooling water cannot flow in at the water inlet, the outdoor temperature is obtained, the cooling is carried out through the air cooling refrigerating system, the running mode can be intelligently selected, and the reliability and the stability of the air conditioning system are ensured. Wherein, the non-operation of the chilled water unit comprises the stop operation of the control of the working personnel and the non-operation of the chilled water unit due to the fault.
In one specific embodiment, after acquiring the outdoor temperature when the chilled water unit is not operating, the controller is configured to:
when the outdoor temperature is higher than the preset air temperature, the compressor 12 is controlled to operate, the fan 211 of the condenser is controlled to operate, and the fluorine pump 23 is not operated, so as to start the air-cooled compressor refrigeration system.
In the machine room air conditioner provided by the embodiment of the invention, when the outdoor temperature is higher than the preset air temperature under the condition that the chilled water unit is not operated, the air-cooled compressor refrigerating system is controlled to be started, the refrigerating system can be intelligently selected, the reliability and the stability of the air-conditioner refrigerating system are ensured, and the energy efficiency of the air-conditioner unit is improved.
In a specific embodiment, after acquiring the outdoor temperature when the chilled water unit is not operating, the controller is further configured to:
when the outdoor temperature is not higher than the preset air temperature, the fluorine pump 23 is controlled to operate, the fan 211 of the condenser is controlled to operate, and the compressor 12 is not controlled to operate, so that the air-cooled fluorine pump refrigeration system is started.
In the machine room air conditioner provided by the embodiment of the invention, under the condition that the chilled water unit is not operated, when the outdoor temperature is higher than the preset air temperature, the air-cooled compressor refrigerating system is controlled to be started, when the outdoor temperature is not higher than the preset air temperature, the air-cooled fluorine pump refrigerating system is controlled to be started, and according to different outdoor temperatures, different air-cooled refrigerating systems are controlled to be started, so that the refrigerating systems can be intelligently selected, the reliability and the stability of the air-conditioner refrigerating systems are ensured, and the energy efficiency of the air-conditioner unit is improved. The specific value of the preset air temperature is not limited, and can be set by a user according to test or experience.
In one specific embodiment, when the outdoor temperature is not higher than the preset air temperature, the fluorine pump 23 is controlled to operate, the fan 211 of the condenser is controlled to operate, and the compressor 12 is not operated, so as to start the air-cooled fluorine pump refrigeration system, and the controller is further configured to:
when the difference between the indoor temperature and the preset temperature is greater than the third threshold, the fluorine pump 23 is controlled to be turned off, and the compressor 12 is controlled to operate so as to switch from the air-cooled fluorine pump refrigeration system to the air-cooled compressor refrigeration system.
In the machine room air conditioner provided by the embodiment of the invention, in the process of radiating through the air-cooled fluorine pump refrigerating system, when the difference between the indoor temperature and the preset temperature is larger than the third threshold value due to the change of the indoor environment, the air-cooled fluorine pump refrigerating system is controlled to be switched to the air-cooled compressor refrigerating system, the most energy-saving operation mode can be intelligently selected when the environment is changed, the reliability and the stability of the air-conditioner refrigerating system can be ensured, and the energy efficiency of an air-conditioning unit is improved. The specific value of the third threshold is not limited, and may be set by the user according to a test or experience.
In one possible embodiment, when the outdoor temperature is higher than the preset air temperature, the compressor 12 is controlled to operate, the fan 211 of the condenser is operated, and the fluorine pump 23 is not operated to start the air-cooled compressor refrigeration system, the controller is further configured to:
When the ratio of the refrigerating capacity of the air-cooled fluorine pump refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a second preset ratio, the compressor is controlled to be closed, and the fluorine pump is controlled to operate so as to be switched to the air-cooled fluorine pump system from the air-cooled compressor refrigerating system.
In the machine room air conditioner provided by the embodiment of the invention, when the ratio of the refrigerating capacity of the air-cooled fluorine pump refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than the second preset ratio in the process of radiating through the air-cooled compressor refrigerating system, the air-cooled compressor refrigerating system is controlled to be switched to the air-cooled fluorine pump refrigerating system, the most energy-saving operation mode can be intelligently selected when the environment changes, the reliability and the stability of the air-conditioner refrigerating system can be ensured, and the energy efficiency of an air-conditioner unit is improved. The refrigerating capacity of the air-cooled fluorine pump refrigerating system is the theoretical refrigerating capacity of the fluorine pump calculated by the control algorithm, and the refrigerating capacity of the air-cooled compressor refrigerating system is the theoretical refrigerating capacity of the compressor calculated by the control algorithm. Specifically, the second preset ratio may be greater than 1, without limitation, and may be set based on experimental tests or experience.
Specifically, in the machine room air conditioner provided in the embodiment of the present invention, a specific operation manner may be as shown in fig. 7. The machine room air conditioner is provided with the condenser 21 and the water-cooling heat exchanger 22, so that the combination of an air cooling refrigeration mode and a chilled water refrigeration mode can be backed up, the switching of operation modes of different refrigeration systems can be realized according to the chilled water supply condition, the outdoor temperature, the indoor temperature and the logic calculation contrast, the air conditioning unit can intelligently select the most energy-saving operation mode when the environment changes, and the reliability and the stability of the system can be ensured.
Based on the same inventive concept, the embodiment of the invention also provides an operation control method of the air conditioner in the machine room, as shown in fig. 8, comprising the following steps:
s801: when the difference value between the indoor temperature and the preset room temperature is larger than a first threshold value, controlling a fan of the evaporator to be started;
s802: acquiring the inlet water temperature of chilled water at the water inlet;
s803: when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
In the operation control method provided by the embodiment of the invention, the water inlet temperature of the chilled water at the water inlet is obtained, and when the water inlet temperature is smaller than the preset water temperature, the chilled water refrigerating system is started, and the independent heat dissipation of the water cooling heat exchanger is realized, so that the energy consumption of the compressor can be reduced, the energy consumption of the air conditioning unit is further reduced, and the energy efficiency of the air conditioning unit is improved.
In another possible embodiment, the operation control method further includes the following steps after the inlet water temperature of the chilled water at the water inlet is obtained:
when the temperature of the inlet water is not less than the preset water temperature, the operation of the compressor, the operation of the fan of the condenser and the non-operation of the fluorine pump are controlled so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system.
In the operation control method of the machine room air conditioner, the inlet water temperature of the chilled water at the water inlet is obtained, when the inlet water temperature is smaller than the preset water temperature, the chilled water refrigerating system is started, and the chilled water refrigerating system can be independently cooled through the water cooling heat exchanger 22, or when the inlet water temperature is not smaller than the preset water temperature, the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air cooling compressor refrigerating system is started, the auxiliary heat dissipation can be supplemented through the water cooling heat exchanger 22, and according to different inlet water temperatures, the independent heat dissipation or the supplementary heat dissipation can be carried out through the water cooling heat exchanger, so that the energy consumption of the compressor can be reduced, the energy consumption of an air conditioning unit is further reduced, and the energy efficiency of the air conditioning unit is improved.
In one possible embodiment, when the temperature of the incoming water is less than a preset water temperature, controlling the fluorine pump to operate, the compressor not to operate, and the fan of the condenser not to operate to start the chilled water refrigeration system, comprising:
when the difference between the indoor temperature and the preset temperature is larger than a second threshold value, the fluorine pump is controlled to be turned off, the compressor is controlled to operate, and the fan of the condenser is controlled to operate, so that the refrigerating system is switched to a double-cold-source refrigerating system consisting of the refrigerating system of chilled water and the refrigerating system of air-cooled compressor.
In one possible implementation manner, when the temperature of the inlet water is not less than a preset water temperature, controlling the compressor to operate, the fan of the condenser to operate, and the fluorine pump not to operate so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system, wherein the double-cold-source refrigerating system comprises:
When the ratio of the refrigerating capacity of the chilled water refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a first preset ratio, the compressor is controlled to be closed, the fan of the condenser is controlled to be closed, and the fluorine pump is controlled to operate, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is switched into the chilled water refrigerating system.
In one possible embodiment, before the obtaining the inlet water temperature of the chilled water at the water inlet, the method comprises:
acquiring the running condition of a chilled water unit;
when the chilled water unit normally operates, acquiring the inlet water temperature of chilled water at the water inlet;
when the chilled water unit is not operating, an outdoor temperature is obtained.
In one possible embodiment, after the outdoor temperature is obtained when the chilled water unit is not operating, the method includes:
when the outdoor temperature is higher than the preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated so as to start the air-cooled compressor refrigerating system.
In another possible embodiment, the operation control method further includes the following steps after the outdoor temperature is obtained when the chilled water unit is not in operation:
when the outdoor temperature is not higher than the preset air temperature, the operation of the fluorine pump, the operation of the fan of the condenser and the non-operation of the compressor are controlled so as to start the air-cooled fluorine pump refrigerating system.
In one possible embodiment, when the outdoor temperature is not higher than the preset air temperature, controlling the operation of the fluorine pump, the operation of the fan of the condenser, and the non-operation of the compressor to start the air-cooled fluorine pump refrigeration system comprises:
and when the difference value between the indoor temperature and the preset temperature is larger than a third threshold value, the fluorine pump is controlled to be turned off, and the compressor is controlled to operate so as to be switched from the air-cooled fluorine pump refrigerating system to the air-cooled compressor refrigerating system.
In one possible embodiment, when the outdoor temperature is higher than a preset air temperature, controlling the compressor to operate, the fan of the condenser to operate, and the fluorine pump not to operate to start the air-cooled compressor refrigeration system, comprising:
when the ratio of the refrigerating capacity of the air-cooled fluorine pump refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a second preset ratio, the compressor is controlled to be closed, and the fluorine pump is controlled to operate so as to be switched to the air-cooled fluorine pump system from the air-cooled compressor refrigerating system.
Based on the same inventive concept, as shown in fig. 9, an embodiment of the present invention further provides an operation control device of an air conditioner in a machine room, including:
a first control unit 100, configured to control a fan of the evaporator to be turned on when a difference between the indoor temperature and a preset room temperature is greater than a first threshold;
An acquisition unit 200 for acquiring the inlet water temperature of chilled water at the water inlet;
a second control unit 300 for:
when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
In a possible embodiment, the second control unit 300, after obtaining the inlet water temperature of the chilled water at the inlet, is further configured to:
when the temperature of the inlet water is not less than the preset water temperature, the operation of the compressor, the operation of the fan of the condenser and the non-operation of the fluorine pump are controlled so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system.
In one possible embodiment, when the temperature of the incoming water is less than the preset water temperature, the fluorine pump is controlled to be operated, the compressor is not operated, the fan of the condenser is not operated, so as to start the chilled water refrigeration system, and the second control unit 300 is further configured to:
when the difference between the indoor temperature and the preset temperature is larger than a second threshold value, the fluorine pump is controlled to be turned off, the compressor is controlled to operate, and the fan of the condenser is controlled to operate, so that the refrigerating system is switched to a double-cold-source refrigerating system consisting of the refrigerating system of chilled water and the refrigerating system of air-cooled compressor.
In one possible implementation manner, when the temperature of the inlet water is not less than the preset water temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated, so as to start the double-cold-source refrigeration system consisting of the chilled water refrigeration system and the air-cooled compressor refrigeration system, and the second control unit 300 is further configured to:
when the ratio of the refrigerating capacity of the chilled water refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a first preset ratio, the compressor is controlled to be closed, the fan of the condenser is controlled to be closed, and the fluorine pump is controlled to operate, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is switched into the chilled water refrigerating system.
In a possible embodiment, before the obtaining the inlet water temperature of the chilled water at the inlet, the obtaining unit 200 is further configured to:
acquiring the running condition of a chilled water unit;
when the chilled water unit normally operates, acquiring the inlet water temperature of chilled water at the water inlet;
when the chilled water unit is not operating, an outdoor temperature is obtained.
In a possible embodiment, after acquiring the outdoor temperature when the chilled water unit is not operating, the second control unit 300 is further configured to:
when the outdoor temperature is higher than the preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated so as to start the air-cooled compressor refrigerating system.
In a possible embodiment, after acquiring the outdoor temperature when the chilled water unit is not operating, the second control unit 300 is further configured to:
when the outdoor temperature is not higher than the preset air temperature, the operation of the fluorine pump, the operation of the fan of the condenser and the non-operation of the compressor are controlled so as to start the air-cooled fluorine pump refrigerating system.
In one possible embodiment, when the outdoor temperature is not higher than the preset air temperature, the fluorine pump is controlled to operate, the fan of the condenser is controlled to operate, and the compressor is not controlled to operate, so as to start the air-cooled fluorine pump refrigeration system, and the second control unit 300 is further configured to:
and when the difference value between the indoor temperature and the preset temperature is larger than a third threshold value, the fluorine pump is controlled to be turned off, and the compressor is controlled to operate so as to be switched from the air-cooled fluorine pump refrigerating system to the air-cooled compressor refrigerating system.
In one possible embodiment, when the outdoor temperature is higher than the preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated to start the air-cooled compressor refrigeration system, the second control unit 300 is further configured to:
when the ratio of the refrigerating capacity of the air-cooled fluorine pump refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a second preset ratio, the compressor is controlled to be closed, and the fluorine pump is controlled to operate so as to be switched to the air-cooled fluorine pump system from the air-cooled compressor refrigerating system.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (25)

1. The machine room air conditioner is characterized by comprising an indoor unit and an outdoor unit, wherein the indoor unit comprises an evaporator, a compressor and a first one-way valve, the outdoor unit comprises a condenser, a water-cooling heat exchanger, a fluorine pump and a second one-way valve, and the condenser and the water-cooling heat exchanger form a heat dissipation assembly; wherein, the liquid crystal display device comprises a liquid crystal display device,
the liquid outlet of the evaporator is connected with the liquid inlet of the compressor and the liquid inlet of the first one-way valve through pipelines, the liquid outlet of the compressor and the liquid outlet of the first one-way valve are connected with the liquid inlet of the heat radiating component through pipelines, the liquid outlet of the heat radiating component is connected with the liquid inlet of the fluorine pump and the liquid inlet of the second one-way valve through pipelines, and the liquid outlet of the fluorine pump and the liquid outlet of the second one-way valve are connected with the liquid inlet of the evaporator through pipelines;
In the heat dissipation assembly, the refrigeration function of the water-cooling heat exchanger and the refrigeration function of the condenser are independently controllable, and a water inlet and a water outlet of the water-cooling heat exchanger are used for being connected with a chilled water unit;
the indoor unit further comprises an expansion valve, the expansion valve is arranged on a pipeline, connected with the evaporator, of the fluorine pump, the second one-way valve and the evaporator, a liquid outlet of the fluorine pump and a liquid outlet of the second one-way valve are connected with a liquid inlet of the expansion valve through pipelines, and a liquid outlet of the expansion valve is connected with a liquid inlet of the evaporator through pipelines;
the liquid outlet of the compressor and the liquid outlet of the first one-way valve are connected with the liquid inlet of the condenser through pipelines, the liquid outlet of the condenser is connected with the liquid inlet of the water-cooling heat exchanger through pipelines, and the liquid outlet of the water-cooling heat exchanger is connected with the liquid inlet of the fluorine pump and the liquid inlet of the second one-way valve through pipelines; or the liquid outlet of the compressor and the liquid outlet of the first one-way valve are connected with the liquid inlet of the water-cooled heat exchanger and the liquid inlet of the condenser through pipelines, and the liquid outlet of the water-cooled heat exchanger and the liquid outlet of the condenser are connected with the liquid inlet of the fluorine pump and the liquid inlet of the second one-way valve through pipelines;
The refrigerating system of the machine room air conditioner comprises a chilled water refrigerating system, a double-cold-source refrigerating system formed by the chilled water refrigerating system and an air-cooled compressor refrigerating system, an air-cooled fluorine pump refrigerating system and an air-cooled compressor refrigerating system;
under the condition that the air conditioning unit is a chilled water refrigerating system, the chilled water unit is operated, the fluorine pump is operated, the compressor is not operated, and the fan of the condenser is not operated;
under the condition that the air conditioning unit is a double-cold-source refrigerating system, the chilled water unit is operated, the compressor is operated, the fan of the condenser is operated, and the fluorine pump is not operated;
under the condition that the air conditioning unit is an air-cooled fluorine pump refrigerating system, the chilled water unit does not operate, the fluorine pump operates, the fan of the condenser operates, and the compressor does not operate;
under the condition that the air conditioning unit is an air-cooled compressor refrigerating system, the chilled water unit does not operate, the compressor operates, the fan of the condenser operates, and the fluorine pump does not operate.
2. The machine room air conditioner according to claim 1, wherein when the liquid outlet of the compressor and the liquid outlet of the first check valve are connected with the liquid inlet of the water-cooled heat exchanger and the liquid inlet of the condenser through pipelines, a first stop valve is arranged on a pipeline connecting the water-cooled heat exchanger with the compressor and the first check valve, and a second stop valve is arranged on a pipeline connecting the condenser with the compressor and the first check valve.
3. The machine room air conditioner of claim 1, wherein a liquid storage tank is arranged on a pipeline, which is connected with the fluorine pump and the first one-way valve, of the heat radiating component.
4. The machine room air conditioner of claim 3, wherein the outdoor unit further comprises a third one-way valve, the liquid outlet of the heat dissipation assembly is connected with the liquid inlet of the third one-way valve through a pipeline, and the liquid outlet of the third one-way valve is connected with the liquid inlet of the evaporator through a pipeline.
5. The machine room air conditioner of claim 1, wherein the outdoor unit further comprises a first electromagnetic valve arranged on a pipeline connecting the fluorine pump and the second one-way valve with the evaporator, and a fourth one-way valve arranged on a pipeline connecting the compressor and the first one-way valve with the heat dissipation assembly, wherein a liquid outlet of the compressor and a liquid outlet of the first one-way valve are connected with a liquid inlet of the fourth one-way valve through a pipeline, and a liquid outlet of the fourth one-way valve is connected with a liquid inlet of the heat dissipation assembly through a pipeline.
6. The machine room air conditioner of claim 1, wherein the indoor unit further comprises a second electromagnetic valve arranged on a pipeline connecting the compressor and the evaporator, and a fifth one-way valve arranged on a pipeline connecting the compressor and the heat dissipation assembly, a liquid outlet of the compressor is connected with a liquid inlet of the fifth one-way valve through a pipeline, and a liquid outlet of the fifth one-way valve is connected with a liquid inlet of the heat dissipation assembly through a pipeline.
7. The machine room air conditioner of claim 1, further comprising:
the indoor temperature detection module is used for detecting indoor temperature;
the water temperature detection module is used for detecting the inlet water temperature of chilled water at the water inlet;
the controller is in signal connection with the fan of the evaporator, the compressor, the fan of the condenser, the fluorine pump, the chilled water unit, the outdoor temperature detection module and the water temperature detection module; the controller is used for:
when the difference value between the indoor temperature and the preset room temperature is larger than a first threshold value, controlling a fan of the evaporator to be started;
acquiring the inlet water temperature of chilled water at the water inlet;
when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
8. The machine room air conditioner of claim 7, wherein after acquiring the inlet water temperature of chilled water at the inlet water inlet, the controller is further configured to:
when the temperature of the inlet water is not less than the preset water temperature, the operation of the compressor, the operation of the fan of the condenser and the non-operation of the fluorine pump are controlled so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system.
9. The machine room air conditioner of claim 7, wherein when the inlet water temperature is less than a preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, the fan of the condenser is not operated to start the chilled water refrigeration system, and the controller is further configured to:
When the difference between the indoor temperature and the preset temperature is larger than a second threshold value, the fluorine pump is controlled to be turned off, the compressor is controlled to operate, and the fan of the condenser is controlled to operate, so that the refrigerating system is switched to a double-cold-source refrigerating system consisting of the refrigerating system of chilled water and the refrigerating system of air-cooled compressor.
10. The machine room air conditioner of claim 8, wherein when the inlet water temperature is not less than a preset water temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated, so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system, and the controller is further configured to:
when the ratio of the refrigerating capacity of the chilled water refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a first preset ratio, the compressor is controlled to be closed, the fan of the condenser is controlled to be closed, and the fluorine pump is controlled to operate, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is switched into the chilled water refrigerating system.
11. The machine room air conditioner of claim 7, further comprising an outdoor temperature detection module for detecting an outdoor temperature; before obtaining the inlet temperature of chilled water at the water inlet, the controller is further configured to:
Acquiring the running condition of a chilled water unit;
when the chilled water unit normally operates, acquiring the inlet water temperature of chilled water at the water inlet;
when the chilled water unit is not operating, an outdoor temperature is obtained.
12. The machine room air conditioner of claim 11, wherein after acquiring the outdoor temperature when the chilled water unit is not operating, the controller is configured to:
when the outdoor temperature is higher than the preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated so as to start the air-cooled compressor refrigerating system.
13. The machine room air conditioner of claim 12, wherein after acquiring the outdoor temperature when the chilled water unit is not operating, the controller is further configured to:
when the outdoor temperature is not higher than the preset air temperature, the operation of the fluorine pump, the operation of the fan of the condenser and the non-operation of the compressor are controlled so as to start the air-cooled fluorine pump refrigerating system.
14. The machine room air conditioner of claim 13, wherein when the outdoor temperature is not higher than a preset air temperature, the fluorine pump is controlled to operate, the blower of the condenser is operated, and the compressor is not operated to start the air-cooled fluorine pump refrigeration system, the controller is further configured to:
and when the difference value between the indoor temperature and the preset temperature is larger than a third threshold value, the fluorine pump is controlled to be turned off, and the compressor is controlled to operate so as to be switched from the air-cooled fluorine pump refrigerating system to the air-cooled compressor refrigerating system.
15. The machine room air conditioner of claim 12, wherein when the outdoor temperature is higher than a preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated to start the air-cooled compressor refrigeration system, the controller further configured to:
when the ratio of the refrigerating capacity of the air-cooled fluorine pump refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a second preset ratio, the compressor is controlled to be closed, and the fluorine pump is controlled to operate so as to be switched to the air-cooled fluorine pump system from the air-cooled compressor refrigerating system.
16. An operation control method applied to the machine room air conditioner of claim 1, characterized by comprising:
when the difference value between the indoor temperature and the preset room temperature is larger than a first threshold value, controlling a fan of the evaporator to be started;
acquiring the inlet water temperature of chilled water at the water inlet;
when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
17. The method for controlling operation of a machine room air conditioner according to claim 16, further comprising, after the obtaining of the inlet water temperature of the chilled water at the water inlet:
when the temperature of the inlet water is not less than the preset water temperature, the operation of the compressor, the operation of the fan of the condenser and the non-operation of the fluorine pump are controlled so as to start the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system.
18. The operation control method according to claim 16, wherein when the temperature of the incoming water is less than a preset water temperature, controlling the fluorine pump to be operated, the compressor not to be operated, and the fan of the condenser not to be operated to start the chilled water refrigeration system, comprises:
when the difference between the indoor temperature and the preset temperature is larger than a second threshold value, the fluorine pump is controlled to be turned off, the compressor is controlled to operate, and the fan of the condenser is controlled to operate, so that the refrigerating system is switched to a double-cold-source refrigerating system consisting of the refrigerating system of chilled water and the refrigerating system of air-cooled compressor.
19. The operation control method according to claim 17, wherein when the temperature of the intake water is not less than a preset water temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated, to start the double-cold-source refrigeration system composed of the chilled water refrigeration system and the air-cooled compressor refrigeration system, comprising:
when the ratio of the refrigerating capacity of the chilled water refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a first preset ratio, the compressor is controlled to be closed, the fan of the condenser is controlled to be closed, and the fluorine pump is controlled to operate, so that the double-cold-source refrigerating system consisting of the chilled water refrigerating system and the air-cooled compressor refrigerating system is switched into the chilled water refrigerating system.
20. The operation control method according to claim 16, characterized by comprising, before the intake water temperature of the chilled water at the water inlet is obtained:
acquiring the running condition of a chilled water unit;
when the chilled water unit normally operates, acquiring the inlet water temperature of chilled water at the water inlet;
when the chilled water unit is not operating, an outdoor temperature is obtained.
21. The operation control method according to claim 20, wherein after the outdoor temperature is obtained when the chilled water unit is not operating, comprising:
when the outdoor temperature is higher than the preset air temperature, the compressor is controlled to operate, the fan of the condenser is controlled to operate, and the fluorine pump is not operated so as to start the air-cooled compressor refrigerating system.
22. The operation control method according to claim 21, wherein after the outdoor temperature is obtained when the chilled water unit is not operating, further comprising:
when the outdoor temperature is not higher than the preset air temperature, the operation of the fluorine pump, the operation of the fan of the condenser and the non-operation of the compressor are controlled so as to start the air-cooled fluorine pump refrigerating system.
23. The operation control method according to claim 22, wherein controlling the operation of the fluorine pump, the operation of the blower of the condenser, and the non-operation of the compressor to start the air-cooled fluorine pump refrigeration system when the outdoor temperature is not higher than the preset air temperature comprises:
And when the difference value between the indoor temperature and the preset temperature is larger than a third threshold value, the fluorine pump is controlled to be turned off, and the compressor is controlled to operate so as to be switched from the air-cooled fluorine pump refrigerating system to the air-cooled compressor refrigerating system.
24. The operation control method according to claim 21, wherein when the outdoor temperature is higher than a preset air temperature, controlling the compressor to operate, the fan of the condenser to operate, and the fluorine pump not to operate to start the air-cooled compressor cooling system, comprising:
when the ratio of the refrigerating capacity of the air-cooled fluorine pump refrigerating system to the refrigerating capacity of the air-cooled compressor refrigerating system is larger than a second preset ratio, the compressor is controlled to be closed, and the fluorine pump is controlled to operate so as to be switched to the air-cooled fluorine pump system from the air-cooled compressor refrigerating system.
25. An operation control device applied to the machine room air conditioner of claim 1, characterized by comprising:
the first control unit is used for controlling the fan of the evaporator to be started when the difference value between the indoor temperature and the preset room temperature is larger than a first threshold value;
the acquisition unit is used for acquiring the inlet water temperature of the chilled water at the water inlet;
a second control unit for:
when the temperature of the inlet water is smaller than the preset water temperature, the fluorine pump is controlled to operate, the compressor is not operated, and the fan of the condenser is not operated so as to start the chilled water refrigerating system.
CN202010978104.5A 2020-09-17 2020-09-17 Machine room air conditioner, operation control method and device of machine room air conditioner Active CN114198872B (en)

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