CN111735167A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN111735167A CN111735167A CN202010727875.7A CN202010727875A CN111735167A CN 111735167 A CN111735167 A CN 111735167A CN 202010727875 A CN202010727875 A CN 202010727875A CN 111735167 A CN111735167 A CN 111735167A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 162
- 239000003507 refrigerant Substances 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000004146 energy storage Methods 0.000 claims abstract description 36
- 238000005057 refrigeration Methods 0.000 claims abstract description 16
- 239000002826 coolant Substances 0.000 claims description 62
- 238000007599 discharging Methods 0.000 claims description 16
- 230000005494 condensation Effects 0.000 abstract description 7
- 238000009833 condensation Methods 0.000 abstract description 7
- 238000005086 pumping Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—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
- F24F11/85—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 variable-flow pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Chemical & Material Sciences (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner and a control method thereof, wherein the air conditioner comprises a refrigeration system, a cold carrying system and a storage container, wherein one end of a condenser in the refrigeration system is connected with an exhaust port of a compressor, one end of a throttling device is connected with the other end of the condenser, one end of an ice-making heat exchanger is connected with the other end of the throttling device, and the other end of the ice-making heat exchanger is connected with an air return port of the compressor; the outlet of the cooling heat exchanger in the cold carrying system is connected with the inlet of the cooling heat exchanger, the inlet of the cooling heat exchanger is connected with the outlet of the cooling heat exchanger, the liquid pump device is arranged between the outlet of the cooling heat exchanger and the inlet of the cooling heat exchanger to drive the secondary refrigerant to flow from the cooling heat exchanger to the cooling heat exchanger, a connecting branch is arranged between the inlet of the liquid pump device and the outlet of the cooling heat exchanger, and a control valve is arranged on the connecting branch; the ice-making heat exchanger and the cold-taking heat exchanger are positioned in the storage container and exchange heat with the energy storage medium in the storage container. The air conditioner of the invention has even air outlet and less condensation.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to an air conditioner and a control method of the air conditioner.
Background
In the field of air conditioners, an ice storage air conditioner in the related technology comprises a cooling heat exchanger and a cooling heat exchanger, wherein the cooling heat exchanger is adopted after ice storage, cold energy is taken out from ice to the cooling heat exchanger through secondary refrigerant circulating in the cooling heat exchanger and the cooling heat exchanger, and air flow around the cooling heat exchanger is driven by a fan to flow, so that the cooling heat exchanger releases the cold energy to the environment around the cooling heat exchanger. When the ice storage air conditioner is used for cooling after ice storage, the temperature of the inlet of the cooling heat exchanger is low, condensation is easy to occur, and the temperature difference between the inlet and the outlet of the cooling heat exchanger is large, so that the air outlet of the cooling heat exchanger is uneven, and the user experience is poor.
Disclosure of Invention
The invention provides an air conditioner which has the advantages of uniform air outlet and less condensation.
The invention provides a control method of an air conditioner, which is used for the air conditioner.
The air conditioner comprises a refrigerating system, a cold carrying system and a storage container, wherein the refrigerating system comprises a compressor, a condenser, a throttling device and an ice-making heat exchanger, one end of the condenser is connected with an exhaust port of the compressor, one end of the throttling device is connected with the other end of the condenser, one end of the ice-making heat exchanger is connected with the other end of the throttling device, and the other end of the ice-making heat exchanger is connected with a return air port of the compressor; the cold carrying system comprises a cold taking heat exchanger, a cold discharging heat exchanger and a liquid pump device, wherein an outlet of the cold taking heat exchanger is connected with an inlet of the cold discharging heat exchanger, an inlet of the cold taking heat exchanger is connected with an outlet of the cold discharging heat exchanger, the liquid pump device is arranged between the outlet of the cold taking heat exchanger and the inlet of the cold discharging heat exchanger to drive secondary refrigerant to flow from the cold taking heat exchanger to the cold discharging heat exchanger, a connecting branch is arranged between an inlet of the liquid pump device and the outlet of the cold discharging heat exchanger, and a control valve is arranged on the connecting branch; the ice-making heat exchanger and the cold-taking heat exchanger are positioned in the storage container and exchange heat with an energy storage medium in the storage container.
According to the air conditioner provided by the embodiment of the invention, the connecting branch is arranged between the inlet of the liquid pump device and the outlet of the cold discharging heat exchanger, and the control valve is arranged on the connecting branch, so that the secondary refrigerant with higher temperature in the cold discharging heat exchanger can flow to the inlet of the liquid pump device through the connecting branch and is mixed with the secondary refrigerant at the outlet of the cold taking heat exchanger, therefore, the temperature at the inlet of the cold discharging heat exchanger can be increased, and the flow of the secondary refrigerant flowing to the inlet of the liquid pump device through the connecting branch can be flexibly adjusted by the control valve according to the temperature of the secondary refrigerant at the inlet of the cold discharging heat exchanger. The air conditioner can flexibly adjust the amount of the secondary refrigerant with higher temperature flowing to the inlet of the liquid pump device through the connecting branch, and further adjust the temperature of the secondary refrigerant at the inlet of the cooling heat exchanger to be higher than the ambient dew point temperature, so that the probability of condensation phenomenon caused by the fact that the temperature at the inlet of the cooling heat exchanger is lower than the ambient dew point temperature can be reduced. And the mixed secondary refrigerant flows into the cooling heat exchanger to reduce the temperature difference between the inlet and the outlet of the cooling heat exchanger, so that the outlet air temperature of the cooling heat exchanger is more uniform, and the use comfort of the air conditioner is improved.
In some embodiments, the air conditioner further comprises a first fan located at one side of the heat rejection heat exchanger to blow cooling energy of the heat rejection heat exchanger to an environment where the heat rejection heat exchanger is located.
In some embodiments, the air conditioner further comprises a second fan, wherein the second fan is positioned at one side of the condenser to accelerate heat exchange of the condenser.
In some embodiments, a first temperature sensor is disposed within the storage container.
In some embodiments, the input to the dump heat exchanger is provided with a second temperature sensor to detect the coolant temperature at the input to the dump heat exchanger.
In some embodiments, the outlet of the rejecting heat exchanger is provided with a third temperature sensor to detect the coolant temperature at the outlet of the rejecting heat exchanger.
In some embodiments, the air conditioner further comprises a fourth temperature sensor for detecting an ambient temperature of an environment in which the heat rejection heat exchanger is located.
In some embodiments, the control valve is an electronic expansion valve.
In some embodiments, the air conditioner includes a cabinet having an air duct, the compressor is disposed in the cabinet, the condenser and the heat rejection exchanger are disposed in the air duct, and the storage container is connected to the cabinet and located below the cabinet.
In some embodiments, the air duct includes a first air duct and a second air duct spaced apart from each other, the condenser is disposed in the first air duct, the cooling heat exchanger is disposed in the second air duct, and the casing is provided with a first air outlet communicated with the first air duct and a second air outlet communicated with the second air duct.
In some embodiments, the first outlet surrounds the second outlet.
According to the control method of the air conditioner, the air conditioner is the air conditioner, and the control method comprises the following steps:
starting a cold using function of the air conditioner;
opening the liquid pump device, keeping the current opening degree of the control valve, and obtaining the temperature Ti of secondary refrigerant at the inlet of the cooling heat exchanger and the ambient temperature Ta of the environment where the cooling heat exchanger is located;
judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1, wherein Delta T1 is a first preset temperature value;
and if not, adjusting the opening of the control valve to be reduced, and continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1.
According to the control method of the air conditioner, the opening degree of the control valve can be adjusted according to the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger and the environment temperature Ta of the environment where the cooling heat exchanger is located, the quantity of the secondary refrigerant flowing into the inlet of the liquid pump device through the connecting branch is adjusted, the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is adjusted in real time, and the air conditioner has a good refrigerating effect.
In some embodiments, the control method further comprises:
acquiring the temperature To of secondary refrigerant at the outlet of the cooling heat exchanger;
when the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1, judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than To-Delta T2 or not, wherein Delta T2 is a second preset temperature value;
if so, adjusting the opening of the control valve to increase, and continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1;
if not, continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1.
In some embodiments, the control method further comprises:
acquiring the temperature Tw of the energy storage medium in the storage container;
judging whether the temperature Tw of an energy storage medium in the storage container is less than or equal to Tc, wherein Tc is a preset icing temperature;
and if so, controlling the compressor to stop.
In some embodiments, the control method further comprises:
judging whether the temperature Tw of the energy storage medium in the storage container is greater than or equal to Td, wherein Td is a preset cooling stop temperature, and Td is greater than or equal to Tc;
and if so, controlling the liquid pump device to stop.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a partial schematic view of an air conditioner according to one embodiment of the present invention;
FIG. 2 is another partial schematic view of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a duct according to one embodiment of the present invention;
fig. 4 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Reference numerals:
an air-conditioner (1000) is provided,
a refrigeration system (100) is provided that,
a compressor 110, a discharge port 111, a return port 112,
a condenser 120, a throttling device 130, an ice-making heat exchanger 140,
the cooling system (200) is provided with a cooling system,
a cooling heat exchanger 210, a cooling heat exchanger 220, a liquid pump device 230,
the flow of the connecting branch 240, the control valve 241,
the storage container 300, the first fan 400, the second fan 500,
the cabinet 400, the air duct 410, the first air duct 411, the second air duct 412,
a first outlet 420 and a second outlet 430.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An air conditioner 1000 and a control method of the air conditioner according to an embodiment of the present invention are described below with reference to fig. 1 to 4.
As shown in fig. 1, an air conditioner 1000 according to an embodiment of the present invention includes a refrigeration system 100, a cooling system 200, and a storage container 300. The refrigeration system 100 can refrigerate to cool the energy storage medium, such as water, in the storage container 300, and the cooling system 200 can extract the cooling energy from the storage container 300 and release the cooling energy to the environment requiring cooling.
Specifically, referring to fig. 1, the refrigeration system 100 includes a compressor 110, a condenser 120, a throttling device 130, and an ice-making heat exchanger 140, one end of the condenser 120 is connected to the discharge port 111 of the compressor 110, one end of the throttling device 130 is connected to the other end of the condenser 120, one end of the ice-making heat exchanger 140 is connected to the other end of the throttling device 130, and the other end of the ice-making heat exchanger 140 is connected to the return port 112 of the compressor 110. Wherein, the ice-making heat exchanger 140 is located in the storage container 300 and exchanges heat with the energy storage medium in the storage container 300.
It can be understood that the refrigerant may circulate in the refrigeration system 100, the compressor 110 may provide power for the refrigerant to circulate in the refrigeration system 100, and output a high-temperature and high-pressure gas refrigerant, the high-temperature and high-pressure gas refrigerant flows to the condenser 120 through the exhaust port 111, the refrigerant is liquefied in the condenser 120 to release heat, the liquefied refrigerant flows to the throttling device 130, the liquid refrigerant is throttled by the throttling device 130 to become a low-temperature and low-pressure fog-like liquid refrigerant, the fog-like liquid refrigerant flows to the ice-making heat exchanger 140, the refrigerant is gasified to absorb heat in the ice-making heat exchanger 140, the temperature of the ice-making heat exchanger 140 is reduced, the ice-making heat exchanger 140 exchanges heat with the energy storage medium in the storage container 300, so that the temperature of the energy storage medium in the storage container 300 is reduced, the energy storage medium in the storage container 300 may be cooled to, the temperature of the energy storage medium in the storage container 300 may be reduced according to practical situations, and is not particularly limited.
Referring to fig. 1, the cold carrying system 200 includes a cooling heat exchanger 210, a cooling heat exchanger 220, and a liquid pumping device 230, wherein an outlet of the cooling heat exchanger 210 is connected to an inlet of the cooling heat exchanger 220, an inlet of the cooling heat exchanger 210 is connected to an outlet of the cooling heat exchanger 220, the liquid pumping device 230 is disposed between an outlet of the cooling heat exchanger 210 and an inlet of the cooling heat exchanger 220 to drive the coolant to flow from the cooling heat exchanger 210 to the cooling heat exchanger 220, a connecting branch 240 is disposed between an inlet of the liquid pumping device 230 and an outlet of the cooling heat exchanger 220, and a control valve 241 is disposed on the connecting branch 240. Wherein, the cooling heat exchanger 210 is located in the storage container 300 and exchanges heat with the energy storage medium in the storage container 300.
It should be noted that the cooling heat exchanger 210 can exchange heat with the energy storage medium in the storage container 300, and after the refrigeration system 100 cools the energy storage medium in the storage container 300, the temperature of the energy storage medium in the storage container 300 is low, so that the temperature of the cooling heat exchanger 210 is low, the secondary refrigerant can circulate in the secondary cooling system 200, the secondary refrigerant can carry cold from the cooling heat exchanger 210 to the cooling heat exchanger 220, and the cooling heat exchanger 220 can exchange heat with the environment where the cooling heat exchanger is located, so that the environment temperature of the environment where the cooling heat exchanger 220 is located is reduced.
Meanwhile, the ambient temperature of the environment where the heat-releasing heat exchanger 220 is located raises the temperature of the heat-releasing heat exchanger 220, so that the temperature of the coolant in the heat-releasing heat exchanger 220 is raised, part of the coolant with higher temperature can return to the heat-taking heat exchanger 210, and part of the coolant can return to the inlet of the liquid pump device 230 through the connecting branch 240, and the coolant is mixed with the cooler coolant flowing out from the outlet of the heat-taking heat exchanger 210 and flows into the heat-releasing heat exchanger 220 through the liquid pump device 230, so that the coolant flowing out from the heat-releasing heat exchanger 220 can be prevented from flowing to the heat-taking heat exchanger 210 for cooling and heat exchange, the temperature at the inlet of the heat-releasing heat exchanger 220 can be raised, the probability of condensation phenomenon caused by the temperature at the inlet of the heat-releasing heat exchanger 220 being lower than the ambient dew-point temperature. Moreover, the mixed coolant flows into the cooling heat exchanger 220, so that the temperature difference between the inlet temperature and the outlet temperature of the cooling heat exchanger 220 is reduced, the outlet air temperature of the cooling heat exchanger 220 is more uniform, and the use comfort of the air conditioner 1000 is improved.
The control valve 241 on the connecting branch 240 can adjust the amount of the coolant flowing into the connecting branch 240 from the outlet of the cooling heat exchanger 220, that is, the amount of the coolant mixed with the cooler coolant flowing out of the outlet of the cooling heat exchanger 210, and the more the control valve 241 adjusts the amount of the coolant flowing into the connecting branch 240, the more the amount of the coolant mixed with the cooler coolant flowing out of the outlet of the cooling heat exchanger 210, the higher the temperature of the coolant flowing into the cooling heat exchanger 220; the control valve 241 regulates the less amount of coolant flowing into the connecting branch 240, the less amount of coolant mixed with the cooler coolant flowing out of the outlet of the heat exchanger 210, and the lower the temperature of the coolant flowing into the heat exchanger 220. Thus, the amount of coolant flowing into the connecting legs 240 can be adjusted by the control valves 241, thereby controlling the temperature of the coolant flowing into the heat rejector 220. In addition, the control valve 241 can control the on/off of the connecting branch 240.
For example, when the temperature of the energy storage medium in the storage container 300 is low, the temperature of the coolant flowing out from the outlet of the cooling heat exchanger 210 is low, and at this time, the opening degree of the control valve 241 may be adjusted to be large, and the amount of the higher-temperature coolant flowing into the connecting branch 240 is large, so that the temperature at the inlet of the cooling heat exchanger 220 may be increased to be higher than the ambient dew point temperature.
For another example, when the temperature of the energy storage medium in the storage container 300 gradually increases, the temperature of the coolant in the heat exchanger 210 gradually increases, the opening degree of the control valve 241 can be adjusted to gradually decrease, and the amount of the higher-temperature coolant flowing into the connecting branch 240 gradually decreases, so that the temperature of the coolant returning from the connecting branch 240 to the inlet of the liquid pumping device 230 can be maintained in a range higher than the dew point temperature of the environment after being mixed with the coolant flowing out from the outlet of the heat exchanger 210.
For another example, when the temperature of the energy storage medium in the storage container 300 is increased to be higher than the ambient dew point temperature, the temperature of the cooling heat exchanger 210 after heat exchange with the energy storage medium in the storage container 300 is higher than the ambient dew point temperature, and the temperature of the coolant flowing out from the outlet of the cooling heat exchanger 210 is higher than the ambient dew point temperature, at this time, the control valve 241 may be closed, and the coolant in the cooling heat exchanger 220 is no longer allowed to flow to the connecting branch 240.
In the field of air conditioners, an ice storage air conditioner in the related technology comprises a cooling heat exchanger and a cooling heat exchanger, wherein the cooling heat exchanger is adopted after ice storage, cold energy is taken out from ice to the cooling heat exchanger through secondary refrigerant circulating in the cooling heat exchanger and the cooling heat exchanger, and air flow around the cooling heat exchanger is driven by a fan to flow, so that the cooling heat exchanger releases the cold energy to the environment around the cooling heat exchanger. When the ice storage air conditioner is used for cooling after ice storage, the temperature of the inlet of the cooling heat exchanger is low, condensation is easy to occur, and the temperature difference between the inlet and the outlet of the cooling heat exchanger is large, so that the air outlet of the cooling heat exchanger is uneven, and the user experience is poor.
In the air conditioner 1000 according to the embodiment of the present invention, the connecting branch 240 is disposed between the inlet of the liquid pumping device 230 and the outlet of the cooling heat exchanger 220, and the control valve 241 is disposed on the connecting branch 240, so that the coolant with higher temperature in the cooling heat exchanger 220 can flow to the inlet of the liquid pumping device 230 through the connecting branch 240 and be mixed with the coolant at the outlet of the cooling heat exchanger 210, thereby increasing the temperature at the inlet of the cooling heat exchanger 220, and the control valve 241 can flexibly adjust the flow rate of the coolant flowing to the inlet of the liquid pumping device 230 through the connecting branch 240 according to the temperature of the coolant at the inlet of the cooling heat exchanger 220. The air conditioner 1000 of the present invention can flexibly adjust the amount of the coolant with a higher temperature flowing to the inlet of the liquid pump device 230 through the connecting branch 240, and further adjust the temperature of the coolant at the inlet of the cooling heat exchanger 220 to be higher than the ambient dew point temperature, thereby reducing the probability of the condensation phenomenon caused by the temperature at the inlet of the cooling heat exchanger 220 being lower than the ambient dew point temperature. Moreover, the mixed coolant flows into the cooling heat exchanger 220, so that the temperature difference between the inlet temperature and the outlet temperature of the cooling heat exchanger 220 is reduced, the outlet air temperature of the cooling heat exchanger 220 is more uniform, and the use comfort of the air conditioner 1000 is improved.
According to some embodiments of the present invention, the air conditioner 1000 may further include a first fan 400, and the first fan 400 may be located at one side of the heat rejecting heat exchanger 220 to blow the cooling capacity of the heat rejecting heat exchanger 220 toward the environment where the heat rejecting heat exchanger 220 is located, whereby the first fan 400 may facilitate the heat rejecting heat exchanger 220 to release the cooling capacity into the environment where the heat rejecting heat exchanger 220 is located. It is understood that in one example as shown in fig. 1, the first fan 400 may be located on the left side of the cooling heat exchanger 220 (left side as shown in fig. 1), and in another example, not shown, the first fan 400 may also be located on the right side of the cooling heat exchanger 220.
According to some embodiments of the present invention, the air conditioner 1000 may further include a second fan 500, and the second fan 500 is located at one side of the condenser 120 to accelerate heat exchange of the condenser 120, so that the working efficiency of the refrigeration system 100 may be improved, and the energy storage medium in the storage container 300 may be cooled down more quickly. It is understood that the second fan 500 may be located on the left side of the condenser 120 (left side as viewed in fig. 1) in one example as illustrated in fig. 1, and the second fan 500 may also be located on the right side of the condenser 120 in another example, not shown in the figure.
In some embodiments of the present invention, a first temperature sensor may be disposed in the storage container 300, and it should be noted that the first temperature sensor may measure the temperature of the energy storage medium in the storage container 300, so that it is convenient to know the temperature change of the energy storage medium, and further control whether the refrigeration system 100 continues to operate, and when the temperature of the energy storage medium in the storage container 300 reaches the temperature expected by the user, the refrigeration system 100 may stop operating. Meanwhile, whether the cold carrying system 200 continues to work or not can be controlled according to the temperature change of the energy storage medium, and when the temperature of the energy storage medium in the storage container 300 reaches the temperature at which the cold cannot be provided, the cold carrying system 200 can stop working.
In some embodiments of the present invention, the inlet of the rejecting heat exchanger 220 may be provided with a second temperature sensor to detect the coolant temperature at the inlet of the rejecting heat exchanger 220. Therefore, the temperature of the coolant at the inlet of the cooling heat exchanger 220 can be monitored conveniently, and the opening degree of the control valve 241 can be flexibly adjusted according to the temperature of the coolant at the inlet of the cooling heat exchanger 220, so that the coolant flowing to the inlet of the liquid pump device 230 through the connecting branch 240 is mixed with the coolant at the outlet of the cooling heat exchanger 210 and then flows to the cooling heat exchanger 220, and the temperature of the coolant is higher than the ambient dew point temperature.
In some embodiments of the present invention, the outlet of the cooling heat exchanger 220 can be provided with a third temperature sensor to detect the coolant temperature at the outlet of the cooling heat exchanger 220. Therefore, the coolant temperature at the outlet of the cooling heat exchanger 220 can be conveniently monitored, and the coolant temperature at the inlet of the cooling heat exchanger 220 is adjusted according to the coolant temperature at the outlet of the cooling heat exchanger 220 (by adjusting the opening degree of the control valve 241), so that the difference between the coolant temperature at the outlet of the cooling heat exchanger 220 and the coolant temperature at the inlet of the cooling heat exchanger 220 is reduced, the air outlet of the cooling heat exchanger 220 is uniform, and the use comfort of the air conditioner 1000 is improved.
According to some embodiments of the present invention, the air conditioner 1000 may further include a fourth temperature sensor for detecting an ambient temperature of an environment in which the cooling heat exchanger 220 is located. Thereby, it may be facilitated to monitor the ambient temperature of the environment in which the heat rejecting heat exchanger 220 is located.
In some embodiments of the present invention, the control valve 241 may be an electronic expansion valve. The electronic expansion valve has a wide adjustment range, is sensitive in action, and is stable and reliable, and the flow of the secondary refrigerant flowing into the connecting branch 240 can be conveniently adjusted by adopting the electronic expansion valve as the control valve 241. Moreover, the electronic expansion valve can adjust the flow of the secondary refrigerant according to a preset program.
As shown in fig. 2, in some embodiments of the present invention, the air conditioner 1000 may include a cabinet 400 having an air duct 410, the compressor 110 provided in the cabinet 400, the condenser 120 and the cooling heat exchanger 220 provided in the air duct 410, and the storage container 300 connected to the cabinet 400 and located below the cabinet 400. Therefore, the overall layout of the air conditioner 1000 is facilitated, the structure of the air conditioner 1000 is more compact and reasonable, and the structure is more stable and reliable.
As shown in fig. 2, the air duct 410 includes a first air duct 411 and a second air duct 412 which are spaced apart from each other, the condenser 120 is disposed in the first air duct 411, the cooling heat exchanger 220 is disposed in the second air duct 412, and the cabinet 400 is provided with a first air outlet 420 communicated with the first air duct 411 and a second air outlet 430 communicated with the second air duct 412.
In the ice making stage, in the first air duct 411, the air flow may exchange heat with the condenser 120, and the hot air after heat exchange is blown out from the first air outlet 420. In the cooling stage, in the second air duct 312, the air flow exchanges heat with the cooling heat exchanger 220, and the cold air after heat exchange is blown out from the second air outlet 430, so that refrigeration of the air conditioner 1000 is realized.
Further, as shown in fig. 3, the first outlet 420 surrounds the second outlet 430. Therefore, in the cooling stage, when the condenser 120 stops operating, the air blown out from the first air outlet 420 in the peripheral ring shape is natural air, the air blown out from the second air outlet 430 in the middle is cold air, and the natural air is blown out together with the cold air, so that the energy loss of the cold air can be reduced.
As shown in fig. 4, according to the control method of the air conditioner in the embodiment of the present invention, the air conditioner 1000 is the air conditioner 1000 described above, and the control method includes:
the cooling function of the air conditioner 1000 is turned on;
the liquid pump device 230 is opened, the control valve 241 keeps the current opening degree, and the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 and the ambient temperature Ta of the environment where the cooling heat exchanger 220 is located are obtained;
judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 is less than Ta-Delta T1, wherein Delta T1 is a first preset temperature value;
if not, the opening of the control valve 241 is adjusted to be reduced, and whether the temperature Ti of the refrigerating medium at the inlet of the cooling heat exchanger 220 is smaller than Ta-Delta T1 is continuously judged.
It can be understood that when the temperature Ti of the coolant at the inlet of the heat rejecting heat exchanger 220 is not less than Ta- Δ T1, which indicates that the temperature Ti is closer to the temperature Ta, and the temperature Ti needs to be properly reduced for achieving the cooling effect, the opening degree of the control valve 241 is reduced to reduce the temperature Ti of the coolant flowing into the inlet of the liquid pumping device 230 through the connecting branch 240 and the coolant mixed with the coolant at the outlet of the heat rejecting heat exchanger 210, so as to reduce the temperature Ti of the coolant flowing into the inlet of the heat rejecting heat exchanger 220.
According to the control method of the air conditioner provided by the embodiment of the invention, the opening degree of the control valve 241 can be adjusted according to the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 and the ambient temperature Ta of the environment where the cooling heat exchanger 220 is located, so as to adjust the amount of the secondary refrigerant flowing into the inlet of the liquid pump device 230 through the connecting branch 240, and further adjust the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 in real time, so that the air conditioner 1000 has a good refrigeration effect.
In some embodiments of the invention, referring to fig. 4, the control method further comprises:
acquiring the temperature To of secondary refrigerant at the outlet of the cooling heat exchanger 220;
when the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 is less than Ta-Delta T1, judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 is less than To-Delta T2 or not, wherein Delta T2 is a second preset temperature value;
if so, adjusting the opening of the control valve 241 to increase, and continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 is less than Ta-Delta T1;
if not, continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger 220 is less than Ta-Delta T1.
It can be understood that when the temperature Ti of the coolant at the inlet of the heat rejecting heat exchanger 220 is less than To- Δ T2, which indicates that the difference between the temperature Ti and the temperature To is large, in order To avoid uneven air outlet of the heat rejecting heat exchanger 220, the temperature Ti needs To be raised appropriately, and at this time, the opening degree of the control valve 241 is adjusted To be increased, so that more coolant flows into the inlet of the liquid pumping device 230 through the connecting branch 240, and more coolant is mixed with the coolant at the outlet of the heat rejecting heat exchanger 210, thereby increasing the temperature Ti of the coolant flowing To the inlet of the heat rejecting heat exchanger 220. Therefore, the air outlet of the cooling heat exchanger 220 is uniform, and the use comfort of the air conditioner 1000 is improved.
According to some embodiments of the invention, the control method further comprises:
acquiring the temperature Tw of the energy storage medium in the storage container 300;
judging whether the temperature Tw of the energy storage medium in the storage container 300 is less than or equal to Tc, wherein Tc is a preset icing temperature;
if yes, the compressor 110 is controlled to stop.
It can be understood that, when the temperature Tw of the energy storage medium in the storage container 300 is less than or equal to the preset freezing temperature Tc, it can be said that the cooling capacity of the energy storage medium in the storage container 300 can meet the cooling requirement, and at this time, the compressor 110 can be controlled to stop, so that the electric energy can be saved, and the waste of the cooling capacity can also be avoided.
In some embodiments of the invention, the control method further comprises:
judging whether the temperature Tw of the energy storage medium in the storage container 300 is greater than or equal to Td, wherein Td is a preset cooling stop temperature, and Td is greater than or equal to Tc;
if so, the liquid pump device 230 is controlled to stop.
It can be understood that, when the temperature Tw of the energy storage medium in the storage container 300 is greater than or equal to the preset cold discharge stopping temperature Td, it can be said that the cold quantity of the energy storage medium in the storage container 300 is insufficient to cool the environment, and at this time, the liquid pump device 230 can be controlled to stop, and the cold carrying system 200 stops working. Therefore, the cold carrying system 200 can be prevented from working under the condition of no refrigeration and wasting electric energy.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (15)
1. An air conditioner, comprising:
the refrigeration system comprises a compressor, a condenser, a throttling device and an ice-making heat exchanger, wherein one end of the condenser is connected with an exhaust port of the compressor, one end of the throttling device is connected with the other end of the condenser, one end of the ice-making heat exchanger is connected with the other end of the throttling device, and the other end of the ice-making heat exchanger is connected with an air return port of the compressor;
the cold carrying system comprises a cold taking heat exchanger, a cold discharging heat exchanger and a liquid pump device, wherein an outlet of the cold taking heat exchanger is connected with an inlet of the cold discharging heat exchanger, an inlet of the cold taking heat exchanger is connected with an outlet of the cold discharging heat exchanger, the liquid pump device is arranged between the outlet of the cold taking heat exchanger and the inlet of the cold discharging heat exchanger to drive secondary refrigerant to flow from the cold taking heat exchanger to the cold discharging heat exchanger, a connecting branch is arranged between an inlet of the liquid pump device and the outlet of the cold discharging heat exchanger, and a control valve is arranged on the connecting branch;
and the ice-making heat exchanger and the cold-taking heat exchanger are positioned in the storage container and exchange heat with an energy storage medium in the storage container.
2. The air conditioner according to claim 1, further comprising: the first fan is positioned on one side of the cooling heat exchanger so as to blow the cold energy of the cooling heat exchanger to the environment where the cooling heat exchanger is positioned.
3. The air conditioner according to claim 1, further comprising: and the second fan is positioned on one side of the condenser so as to accelerate the heat exchange of the condenser.
4. The air conditioner of claim 1, wherein a first temperature sensor is disposed within the storage container.
5. The air conditioner according to claim 1, wherein the input of the rejecting heat exchanger is provided with a second temperature sensor for detecting the coolant temperature at the input of the rejecting heat exchanger.
6. The air conditioner according to claim 1, wherein the outlet of the heat rejection heat exchanger is provided with a third temperature sensor for detecting the temperature of the coolant at the outlet of the heat rejection heat exchanger.
7. The air conditioner of claim 1, further comprising a fourth temperature sensor for detecting an ambient temperature of an environment in which the heat rejection heat exchanger is located.
8. The air conditioner according to any one of claims 1 to 7, wherein the control valve is an electronic expansion valve.
9. The air conditioner according to claim 1, wherein the air conditioner comprises:
the casing, the casing has the wind channel, the compressor is established in the casing, the condenser with put cold heat exchanger and establish in the wind channel, storage container with the casing is connected and is located the below of casing.
10. The air conditioner as claimed in claim 9, wherein the air duct includes a first air duct and a second air duct spaced apart from each other, the condenser is disposed in the first air duct, the cooling heat exchanger is disposed in the second air duct, and the cabinet is provided with a first air outlet communicating with the first air duct and a second air outlet communicating with the second air duct.
11. The air conditioner of claim 10, wherein the first outlet vent surrounds the second outlet vent.
12. A control method of an air conditioner, characterized in that the air conditioner is the air conditioner according to any one of claims 1 to 11, the control method comprising:
starting a cold using function of the air conditioner;
opening the liquid pump device, keeping the current opening degree of the control valve, and obtaining the temperature Ti of secondary refrigerant at the inlet of the cooling heat exchanger and the ambient temperature Ta of the environment where the cooling heat exchanger is located;
judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1, wherein Delta T1 is a first preset temperature value;
and if not, adjusting the opening of the control valve to be reduced, and continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1.
13. The control method of an air conditioner according to claim 12, further comprising:
acquiring the temperature To of secondary refrigerant at the outlet of the cooling heat exchanger;
when the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1, judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than To-Delta T2 or not, wherein Delta T2 is a second preset temperature value;
if so, adjusting the opening of the control valve to increase, and continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1;
if not, continuously judging whether the temperature Ti of the secondary refrigerant at the inlet of the cooling heat exchanger is less than Ta-Delta T1.
14. The control method of an air conditioner according to claim 12, further comprising:
acquiring the temperature Tw of the energy storage medium in the storage container;
judging whether the temperature Tw of an energy storage medium in the storage container is less than or equal to Tc, wherein Tc is a preset icing temperature;
and if so, controlling the compressor to stop.
15. The control method of an air conditioner according to claim 14, further comprising:
judging whether the temperature Tw of the energy storage medium in the storage container is greater than or equal to Td, wherein Td is a preset cooling stop temperature, and Td is greater than or equal to Tc;
and if so, controlling the liquid pump device to stop.
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| CN202010727875.7A CN111735167A (en) | 2020-07-23 | 2020-07-23 | Air conditioner and control method thereof |
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