CN111947379A - Air conditioning unit capable of effectively utilizing energy and control method and device thereof - Google Patents
Air conditioning unit capable of effectively utilizing energy and control method and device thereof Download PDFInfo
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- CN111947379A CN111947379A CN202010797875.4A CN202010797875A CN111947379A CN 111947379 A CN111947379 A CN 111947379A CN 202010797875 A CN202010797875 A CN 202010797875A CN 111947379 A CN111947379 A CN 111947379A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004146 energy storage Methods 0.000 claims abstract description 198
- 239000003507 refrigerant Substances 0.000 claims description 68
- 238000001514 detection method Methods 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
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Classifications
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D13/00—Stationary devices, e.g. cold-rooms
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning unit capable of effectively utilizing energy and a control method and a control device thereof, wherein the air conditioning unit comprises: an outer machine and a plurality of inner machines; and the energy storage device is connected with the internal machines in parallel and is used for starting when one or more internal machines are turned off and accumulating energy for heat exchange. The invention solves the problem of energy surplus caused by shutdown of part of internal machines in a one-drive-multiple unit in the prior art, reasonably utilizes energy, can reduce operation cost and can realize accurate temperature control.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning unit capable of effectively utilizing energy and a control method and device thereof.
Background
Along with the increasingly high requirements of people on food quality, the cold chain industry is continuously developed, the market demand of products is also improved, and the construction and production scale of the refrigeration house is continuously increased. According to statistics, the power consumption of the existing refrigeration equipment accounts for 15% of the domestic power consumption, so that the energy saving significance of the refrigeration house is great.
The existing refrigeration houses are usually provided with one-driven-multiple air cooling units, when one refrigeration house reaches the target temperature, the fan corresponding to the refrigeration house is stopped, other air coolers normally operate, and the compressor cannot be stopped, so that the cold quantity is excessive.
Aiming at the problem of energy surplus caused by the shutdown of part of internal machines in one-drive-multiple units in the related technology, no effective solution is provided at present.
Disclosure of Invention
The invention provides an air conditioning unit capable of effectively utilizing energy and a control method and a control device thereof, which are used for at least solving the problem of energy surplus caused by shutdown of part of internal machines in a multi-split unit in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioning unit including: an outer machine and a plurality of inner machines; and the energy storage device is connected with the internal machines in parallel and is used for starting when one or more internal machines are turned off and accumulating energy for heat exchange.
Further, the energy storage device includes: one end of the first heat exchange pipeline is connected with a compressor of the outer unit, and the other end of the first heat exchange pipeline is connected with a condenser of the outer unit and used for providing energy for the energy storage device; and the refrigerant box is used for storing energy.
Further, the energy storage device still includes: the heat exchange channel comprises a first channel port and a second channel port, and the first channel port and the second channel port are both connected with the refrigerant box and are used for introducing the refrigerant in the refrigerant box and exchanging heat with the first heat exchange pipeline; wherein, the first heat exchange pipeline is positioned in the heat exchange channel.
Further, the energy storage device still includes: the first stop valve is positioned at the first channel port and used for controlling the on-off of the heat exchange channel; and the first circulating pump is positioned at the second passage opening and used for controlling the circulation of the refrigerant between the heat exchange passage and the refrigerant box.
Further, the unit also includes: the heat exchanger comprises a second heat exchange pipeline; the heat exchange pipeline comprises a first port and a second port, and the first port and the second port are both connected with the refrigerant box and used for introducing the refrigerant in the refrigerant box into the second heat exchange pipeline for heat exchange.
Further, the energy storage device still includes: the second stop valve is positioned between the first port and the refrigerant box and used for controlling the refrigerant to enter the heat exchange pipeline; and the second circulating pump is positioned between the second port and the refrigerant box and used for controlling the refrigerant to circulate between the heat exchange pipeline and the refrigerant box.
Further, the heat exchanger still includes: a fan; and the air pipe connected with the fan is introduced into a room needing heat exchange.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit control method, applied to the air conditioning unit, including: detecting the operation mode of the air conditioning unit; controlling the running states of the energy storage device and the internal machine according to the running mode; wherein, the operating condition of energy storage device includes at least: an energy storage state, an energy release state, and a shutdown state; the operation state of the internal machine at least includes: a power-on state and a power-off state.
Further, the operation mode includes at least: the heat exchange control system comprises an air conditioning unit independent heat exchange mode, an energy storage device independent heat exchange mode, a simultaneous heat exchange mode, an energy storage device energy storage mode and an energy storage and heat exchange mode; controlling the running states of the energy storage device and the internal machine according to the running mode, comprising: when the operation mode is the independent heat exchange mode of the air conditioning unit, controlling the internal unit to enter a starting state; when the operation mode is the single heat exchange mode of the energy storage device, the energy storage device is controlled to enter an energy release state, and the internal machine enters a shutdown state; when the operation mode is the simultaneous heat exchange mode, controlling the energy storage to enter an energy release state, and controlling the internal machine to enter a starting state; when the operation mode is the energy storage mode of the energy storage device, the energy storage device is controlled to enter an energy storage state, and the internal machine enters a shutdown state; and when the operation mode is the energy storage and heat exchange mode, the energy storage device is controlled to enter an energy storage state, and the internal machine enters a starting state.
Further, controlling the energy storage device into an energy storage state includes: controlling the first circulating pump to be started and controlling the first stop valve to be opened; controlling an energy storage device into an energy release state, comprising: and controlling the second circulating pump to be started and controlling the second stop valve to be opened.
Further, after controlling the energy storage device to enter the energy storage state and the internal machine to enter the shutdown state, the method further comprises the following steps: detecting whether the temperature of the refrigerant box meets a preset temperature condition and/or detecting the starting of an internal machine; if yes, entering a shutdown state.
Further, after controlling the energy storage device to enter the energy storage state and the internal machine to enter the starting state, the method further comprises the following steps: detecting a shutdown signal of an internal machine; if part of the internal machines are turned off, detecting whether the temperature of the refrigerant box meets a preset temperature condition; if so, controlling the air conditioning unit to enter an independent heat exchange mode of the energy storage device; if not, controlling the energy storage device to maintain an energy storage state; and if all the internal machines are shut down, controlling the air conditioning unit to enter an energy storage mode of the energy storage device.
Further, when the operation mode is the independent heat exchange mode of the air conditioning unit, after controlling the internal unit to enter the power-on state, the method further comprises the following steps: detecting the suction superheat degree of each indoor unit; controlling the opening degree of an electronic expansion valve of the corresponding indoor unit according to the suction superheat degree; judging whether the evaporation load of the internal machine is increased or not; if so, controlling the energy storage device to enter an energy release state; wherein, whether the evaporation load of the inner machine is increased is judged by the following conditions: the electronic expansion valve maintains the maximum opening state for a first preset time, the suction superheat degree is lower than a first preset value, and the increased amplitude is smaller than a second preset value.
Further, after controlling the energy storage device to enter the energy release state, the method further comprises: re-detecting the suction superheat degree of each indoor unit; judging whether the suction superheat degree of each indoor unit meets the closing condition of the energy storage device or not; wherein the shutdown conditions include: the suction superheat degree of each indoor unit is all larger than a third preset value and smaller than a fourth preset value within second preset time, and the increased amplitude is smaller than a fifth preset value; and if so, controlling the energy storage device to be closed.
Further, before detecting the operation mode of the air conditioning unit, the method further comprises the following steps: monitoring whether a starting signal is received; if yes, controlling the energy storage device to start an energy release mode, and precooling or preheating the indoor space; after pre-cooling or pre-heating, the energy storage device is controlled to be closed.
Further, control energy storage device and open energy release mode, precool or preheat indoor, include: and controlling the second circulating pump to run at the maximum rotating speed, and controlling the fan to run at the maximum frequency.
According to still another aspect of an embodiment of the present invention, there is provided an air conditioning unit control apparatus including: the detection module is used for detecting the operation mode of the air conditioning unit; the control module is used for controlling the running states of the energy storage device and the internal machine according to the running mode; wherein, the operating condition of energy storage device includes at least: an energy storage state and an energy release state shutdown state; the operation state of the internal machine at least includes: a power-on state and a power-off state.
According to still another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
The invention provides an air conditioning unit, which comprises an outer machine and a plurality of inner machines, and also comprises an energy storage device, wherein the energy storage device is used for starting when one or more inner machines are turned off, and accumulating energy for heat exchange. The air conditioning unit stores and converts cold or heat through the energy storage device, effectively solves the problem that energy is excessive due to shutdown of part of internal machines in the one-drive-multiple units in the prior art, can reduce operating cost and can also realize accurate temperature control.
Drawings
Fig. 1 is a schematic view of an alternative configuration of an air conditioning assembly according to an embodiment of the present invention;
FIG. 2 is an alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention; and
fig. 3 is a block diagram of an alternative configuration of an air conditioning control apparatus according to an embodiment of the present invention.
Description of reference numerals:
1. a compressor; 2. a condenser; 3. a first electronic expansion valve; 4. a first evaporator; 5. a second evaporator; 6. a third evaporator; 7. a first heat exchange line; 8. a second electronic expansion valve; 9. a third electronic expansion valve; 10. a fourth electronic expansion valve; 11. a bypass electromagnetic valve; 12. a first shut-off valve; 13. a second stop valve; 14. a first circulation pump; 15. a fan; 16. a second circulation pump; 17. a high pressure sensor; 18. a low pressure sensor; 19. a gas-suction temperature sensing bulb; 20. an exhaust temperature sensing bulb; 21. a refrigerant tank; 22. a second heat exchange line; 23. a first pressure sensor; 24. a second pressure sensor; 25. a third pressure sensor; 26. a fourth pressure sensor; 27. a fifth pressure sensor; 28. and a sixth pressure sensor.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, an air conditioning unit is provided, and specifically, fig. 1 shows an alternative structural schematic diagram of the unit, as shown in fig. 1, the unit includes:
an outer machine and a plurality of inner machines;
and the energy storage device is connected with the internal machines in parallel and is used for starting when one or more internal machines are turned off and accumulating energy for heat exchange.
In the above embodiment, an air conditioning unit is provided, which includes, in addition to an external unit and a plurality of internal units, an energy storage device, and is configured to be turned on when one or more internal units are turned off, and store energy for heat exchange. The air conditioning unit stores and converts cold or heat through the energy storage device, effectively solves the problem that energy is excessive due to shutdown of part of internal machines in the one-drive-multiple units in the prior art, can reduce operating cost and can also realize accurate temperature control.
As shown in fig. 1, the energy storage device includes: one end of the first heat exchange pipeline 7 is connected with the compressor 1 of the outdoor unit, and the other end of the first heat exchange pipeline is connected with the condenser 2 of the outdoor unit and used for providing energy for the energy storage device; and a refrigerant tank 21 for storing energy.
In a preferred embodiment of the present invention, the energy storage device further includes: the heat exchange channel comprises a first channel port and a second channel port, and the first channel port and the second channel port are both connected with the refrigerant box 21 and are used for introducing the refrigerant in the refrigerant box 21 and exchanging heat with the first heat exchange pipeline 7; wherein the first heat exchange line 7 is located in the heat exchange channel. The first stop valve 12 is positioned at the first channel port and used for controlling the on-off of the heat exchange channel; and the first circulating pump 14 is positioned at the second passage port and used for controlling the circulation of the refrigerant between the heat exchange passage and the refrigerant tank 21. The heat exchange channel is filled with a refrigerant, the first heat exchange pipeline 7 is immersed in the refrigerant and exchanges heat with the refrigerant, the first stop valve 12 is used for controlling the on-off of the heat exchange channel, namely the flow of the refrigerant, and the first circulating pump 14 is used for controlling the pressure difference required by the flow of the refrigerant in the heat exchange channel and promoting the flow of the refrigerant.
In addition to the energy storage function, the energy storage device also has a cooling or heating function, i.e. a heat exchanger, comprising a second heat exchange line 22; the second heat exchange pipeline 22 includes a first port and a second port, and both the first port and the second port are connected to the refrigerant tank 21, and are configured to introduce the refrigerant in the refrigerant tank 21 into the second heat exchange pipeline 22 to exchange heat with air.
The transduction effect is realized through the heat exchanger, namely, the refrigerant is introduced into the heat exchange pipeline, and then the refrigerant is introduced into a room needing heat exchange through the fan 15 and the air pipe connected with the fan 15. The energy storage is converted into the required cold quantity or heat quantity through the heat exchanger, the balance between the energy storage and the energy conversion is realized, the energy-saving effect is achieved, meanwhile, the inner machine does not need to be started and stopped simultaneously, the frequency conversion is not needed for the compressor 1, the phenomenon that the number of times of starting and stopping the machine set is too large is avoided, and the number of times of starting and stopping the machine set is reduced.
For controlling the heat exchanger, the energy storage device further comprises: the second stop valve 13 is positioned between the first port and the refrigerant box 21 and used for controlling the refrigerant to enter the heat exchange pipeline; and the second circulating pump 16 is located between the second port and the refrigerant tank 21, and is used for controlling the refrigerant to circulate between the heat exchange pipeline and the refrigerant tank 21.
In the air conditioning unit, the energy storage device uses the first heat exchange pipeline 7 to connect the evaporator 4, the evaporator 5 and the evaporator 6 in parallel, and the other energy storage tank contains a refrigerant, namely a refrigerant tank 21. The refrigerant can be a low-temperature secondary refrigerant (ethylene glycol aqueous solution or propylene glycol aqueous solution) or a medium-temperature or high-temperature secondary refrigerant (brine) according to the requirement. While a set of heat exchange lines is flanked, which are controlled by a circulation pump 16 and a shut-off valve 13. On the other side, the refrigerant in the water tank flows by pressure difference formed by a circulating pump 16, and the pipeline can be a large-scale fin heat exchanger. When the energy of the energy storage device is used, the compressor 1 is closed, the fan 15 is turned on, and the air is sent to a required room through the blast pipe. The circulating pump can adopt a variable-frequency cold water circulating pump, and the rotating speed of the cold water circulating pump can be changed according to opening signals of the first electronic expansion valve 8, the second electronic expansion valve 9 and the third electronic expansion valve 10.
Optionally, above-mentioned unit can be used to the freezer, when certain freezer reaches the freezer temperature, need not to close the compressor, through opening and stopping of adjusting stop valve and circulating pump, through refrigerant (low temperature secondary refrigerant), realizes the conversion that refrigerating unit holds cold and puts cold, reaches unnecessary cold volume reasonable application, reduces use cost, and simultaneously, the accurate accuse temperature of freezer is realized to accessible compressor and energy storage device's switching.
Example 2
Based on the air conditioning unit provided in the foregoing embodiment 1, in a preferred embodiment 2 of the present invention, there is further provided an air conditioning unit control method, specifically, fig. 2 shows an optional flowchart of the method, and as shown in fig. 2, the method includes the following steps S202 to S204:
s202: detecting the operation mode of the air conditioning unit;
s204: controlling the running states of the energy storage device and the internal machine according to the running mode; wherein, the operating condition of energy storage device includes at least: an energy storage state, an energy release state, and a shutdown state; the operation state of the internal machine at least includes: a power-on state and a power-off state.
In the above embodiment, an air conditioning unit is provided, which includes, in addition to an external unit and a plurality of internal units, an energy storage device, and is configured to be turned on when one or more internal units are turned off, and store energy for heat exchange. The air conditioning unit stores and converts cold or heat through the energy storage device, effectively solves the problem that energy is excessive due to shutdown of part of internal machines in the one-drive-multiple units in the prior art, can reduce operating cost and can also realize accurate temperature control.
Wherein, the operational mode of air conditioning unit includes at least: the heat exchange control system comprises an air conditioning unit independent heat exchange mode, an energy storage device independent heat exchange mode, a simultaneous heat exchange mode, an energy storage device energy storage mode and an energy storage and heat exchange mode; controlling the running states of the energy storage device and the internal machine according to the running mode, comprising: when the operation mode is the independent heat exchange mode of the air conditioning unit, controlling the internal unit to enter a starting state; when the operation mode is the single heat exchange mode of the energy storage device, the energy storage device is controlled to enter an energy release state, and the internal machine enters a shutdown state; when the operation mode is the simultaneous heat exchange mode, controlling the energy storage to enter an energy release state, and controlling the internal machine to enter a starting state; when the operation mode is the energy storage mode of the energy storage device, the energy storage device is controlled to enter an energy storage state, and the internal machine enters a shutdown state; and when the operation mode is the energy storage and heat exchange mode, the energy storage device is controlled to enter an energy storage state, and the internal machine enters a starting state.
In the above embodiment, controlling the energy storage device to enter the energy storage state includes: controlling the first circulating pump to be started and controlling the first stop valve to be opened; controlling an energy storage device into an energy release state, comprising: and controlling the second circulating pump to be started and controlling the second stop valve to be opened.
According to the state of refrigerant case, after controlling energy storage device and entering energy storage state, the interior machine gets into the shutdown state, still includes: detecting whether the temperature of the refrigerant box meets a preset temperature condition and/or detecting the starting of an internal machine; if yes, entering a shutdown state. When the energy storage device is used in a refrigeration house, the preset temperature condition is less than-15 ℃ (high-temperature refrigeration house) or less than-30 ℃ (low-temperature refrigeration house).
In addition, control energy storage device and get into the energy storage state, after the internal unit gets into the start-up state, still include: detecting a shutdown signal of an internal machine; if part of the internal machines are turned off, detecting whether the temperature of the refrigerant box meets a preset temperature condition; if so, controlling the air conditioning unit to enter an independent heat exchange mode of the energy storage device; if not, controlling the energy storage device to maintain an energy storage state; and if all the internal machines are shut down, controlling the air conditioning unit to enter an energy storage mode of the energy storage device.
And, when the running mode is air conditioning unit independent heat transfer mode, after controlling the interior machine and entering the start state, still include: detecting the suction superheat degree of each indoor unit; controlling the opening degree of an electronic expansion valve of the corresponding indoor unit according to the suction superheat degree; judging whether the evaporation load of the internal machine is increased or not; if so, controlling the energy storage device to enter an energy release state; wherein, whether the evaporation load of the inner machine is increased is judged by the following conditions: the electronic expansion valve maintains the maximum opening state for a first preset time, the suction superheat degree is lower than a first preset value, and the increased amplitude is smaller than a second preset value.
The pressure sensors are added to the outlet of the evaporator and the branch outlet pipes in the unit, the opening degree of the electronic expansion valve is controlled through pressure detection and program calculation, the superheat degree is calculated at the same time, the opening degree of the circulating pump and the electronic expansion valve is judged, the accurate temperature control of the refrigeration house is realized, and the unit is prevented from being started and stopped frequently.
The determination process is as follows: the evaporator outlet pressure sensors 23, 24, 25, LP1, LP2, LP3 are sensed to calculate the evaporation temperature. The individual branch suction superheat is calculated in conjunction with the individual branch outlet tube pressure sensors 26, 27, 28 pressure CP1, CP2, CP 3: if n is greater than or equal to 8 ℃, controlling the opening of the electronic expansion valve to be small; and if n is less than 8 ℃, controlling the opening of the electronic expansion valve to be large. The opening degrees of the electronic expansion valves 8, 9, 10 are controlled according to the suction superheat degree, and the rotation speeds of the pump 16 and the fan 15 are controlled according to the suction superheat degree.
After the energy storage device is controlled to enter the energy release state, the method further comprises the following steps: re-detecting the suction superheat degree of each indoor unit; judging whether the suction superheat degree of each indoor unit meets the closing condition of the energy storage device or not; wherein the shutdown conditions include: the suction superheat degree of each indoor unit is all larger than a third preset value and smaller than a fourth preset value within second preset time, and the increased amplitude is smaller than a fifth preset value; and if so, controlling the energy storage device to be closed.
In another optional embodiment of the present invention, before detecting the operation mode of the air conditioning unit, the method further includes: monitoring whether a starting signal is received; if yes, controlling the energy storage device to start an energy release mode, and precooling or preheating the indoor space; after pre-cooling or pre-heating, the energy storage device is controlled to be closed. Further, control energy storage device and open energy release mode, precool or preheat indoor, include: and controlling the second circulating pump to run at the maximum rotating speed, and controlling the fan to run at the maximum frequency. The internal machine is started after the energy storage device is precooled or preheated, so that quick refrigeration or heating is realized, and meanwhile, the energy of the energy storage device is utilized, and the energy and the cost are saved.
Example 3
Based on the air conditioner control method provided in the foregoing embodiment 2, in a preferred embodiment 3 of the present invention, an air conditioning unit device is further provided, and specifically, fig. 3 shows an optional structural block diagram of the device, and as shown in fig. 3, the device includes:
the detection module 302 is used for detecting the operation mode of the air conditioning unit;
the control module 304 is connected with the detection module 302 and is used for controlling the running states of the energy storage device and the internal machine according to the running mode; wherein, the operating condition of energy storage device includes at least: an energy storage state and an energy release state shutdown state; the operation state of the internal machine at least includes: a power-on state and a power-off state.
In the above embodiment, an air conditioning unit is provided, which includes, in addition to an external unit and a plurality of internal units, an energy storage device, and is configured to be turned on when one or more internal units are turned off, and store energy for heat exchange. The air conditioning unit stores and converts cold or heat through the energy storage device, effectively solves the problem that energy is excessive due to shutdown of part of internal machines in the one-drive-multiple units in the prior art, can reduce operating cost and can also realize accurate temperature control.
Wherein, the operational mode of air conditioning unit includes at least: the heat exchange control system comprises an air conditioning unit independent heat exchange mode, an energy storage device independent heat exchange mode, a simultaneous heat exchange mode, an energy storage device energy storage mode and an energy storage and heat exchange mode; the control module 304 includes: the first control submodule is used for controlling the internal unit to enter a starting state when the operation mode is the independent heat exchange mode of the air conditioning unit; the second control submodule is used for controlling the energy storage device to enter an energy release state and the internal machine to enter a shutdown state when the operation mode is the single heat exchange mode of the energy storage device; the third control sub-module is used for controlling the energy storage to enter an energy release state and the internal machine to enter a starting state when the operation mode is the simultaneous heat exchange mode; the fourth control submodule is used for controlling the energy storage device to enter an energy storage state and the internal machine to enter a shutdown state when the operation mode is the energy storage mode of the energy storage device; and the fifth control submodule is used for controlling the energy storage device to enter an energy storage state and the internal machine to enter a starting state when the operation mode is an energy storage and heat exchange mode.
Controlling an energy storage device into an energy storage state, comprising: controlling the first circulating pump to be started and controlling the first stop valve to be opened; controlling an energy storage device into an energy release state, comprising: and controlling the second circulating pump to be started and controlling the second stop valve to be opened.
Further, the fourth control sub-module includes: the first detection unit is used for detecting whether the temperature of the refrigerant box meets a preset temperature condition or not and/or detecting the startup of the internal machine after the energy storage device is controlled to enter an energy storage state and the internal machine enters a shutdown state; and the first control unit is used for entering a shutdown state if the first control unit is in the shutdown state.
The fifth control sub-module includes: the second detection unit is used for detecting a shutdown signal of the internal machine after controlling the energy storage device to enter an energy storage state and the internal machine to enter a startup state; the third detection unit is used for detecting whether the temperature of the refrigerant box meets a preset temperature condition or not if part of the internal machines are turned off; the second control unit is used for controlling the air conditioning unit to enter an independent heat exchange mode of the energy storage device if the first control unit meets the requirement; the third control unit is used for controlling the energy storage device to maintain the energy storage state if the energy storage state is not met; and the fourth control unit is used for controlling the air conditioning unit to enter an energy storage mode of the energy storage device if all the internal machines are turned off.
The first control sub-module includes: the fourth detection unit is used for detecting the air suction superheat degree of each indoor unit after the indoor units are controlled to enter the starting state; the fifth control unit is used for controlling the opening degree of the electronic expansion valve of the corresponding indoor unit according to the suction superheat degree; a first judgment unit for judging whether the evaporation load of the internal machine increases; the sixth control unit is used for controlling the energy storage device to enter an energy release state if the energy storage device is in the energy release state; wherein, whether the evaporation load of the inner machine is increased is judged by the following conditions: the electronic expansion valve maintains the maximum opening state for a first preset time, the suction superheat degree is lower than a first preset value, and the increased amplitude is smaller than a second preset value.
The re-detection unit is used for re-detecting the suction superheat degree of each indoor unit after controlling the energy storage device to enter the energy release state; the second judgment unit is used for judging whether the suction superheat degree of each internal machine meets the closing condition of the energy storage device or not; wherein the shutdown conditions include: the suction superheat degree of each indoor unit is all larger than a third preset value and smaller than a fourth preset value within second preset time, and the increased amplitude is smaller than a fifth preset value; and the seventh control unit is used for controlling the energy storage device to be closed if the current time is positive.
Preferably, the apparatus further comprises: the monitoring module is used for monitoring whether a starting signal is received before detecting the operation mode of the air conditioning unit; the preheating module is used for controlling the energy storage device to start an energy release mode if the energy storage device is in the energy release mode, and precooling or preheating the indoor space; and the closing module is used for controlling the energy storage device to be closed after precooling or preheating. Wherein, control energy storage device opens the energy release mode, precools or preheats indoor, includes: and controlling the second circulating pump to run at the maximum rotating speed, and controlling the fan to run at the maximum frequency.
With regard to the apparatus in the above embodiments, the specific manner in which each unit and each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.
Example 4
Based on the air conditioning unit control method provided in embodiment 2 above, there is also provided in a preferred embodiment 4 of the present invention a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the above embodiment, an air conditioning unit is provided, which includes, in addition to an external unit and a plurality of internal units, an energy storage device, and is configured to be turned on when one or more internal units are turned off, and store energy for heat exchange. The air conditioning unit stores and converts cold or heat through the energy storage device, effectively solves the problem that energy is excessive due to shutdown of part of internal machines in the one-drive-multiple units in the prior art, can reduce operating cost and can also realize accurate temperature control.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (18)
1. An air conditioning assembly, comprising:
an outer machine and a plurality of inner machines;
and the energy storage device is connected with the internal machines in parallel and is used for starting when one or more internal machines are turned off and accumulating energy for heat exchange.
2. The aggregate of claim 1, wherein the energy storage device comprises:
one end of the first heat exchange pipeline (7) is connected with a compressor (1) of the outdoor unit, and the other end of the first heat exchange pipeline is connected with a condenser (2) of the outdoor unit and used for providing energy for the energy storage device;
and a refrigerant tank (21) for storing energy.
3. The assembly according to claim 2, characterized in that said energy storage means further comprise:
the heat exchange channel comprises a first channel port and a second channel port, and the first channel port and the second channel port are both connected with the refrigerant box (21) and are used for introducing the refrigerant in the refrigerant box (21) and exchanging heat with the first heat exchange pipeline (7); wherein the first heat exchange line (7) is located within the heat exchange channel.
4. The aggregate of claim 3, wherein the energy storage device further comprises:
the first stop valve (12) is positioned at the first channel port and used for controlling the on-off of the heat exchange channel;
and the first circulating pump (14) is positioned at the second passage opening and used for controlling the circulation of the refrigerant between the heat exchange passage and the refrigerant tank (21).
5. The aggregate according to claim 2, characterized in that it further comprises:
a heat exchanger comprising a second heat exchange circuit (22); the second heat exchange pipeline (22) comprises a first port and a second port, and the first port and the second port are both connected with the refrigerant box (21) and are used for introducing the refrigerant in the refrigerant box (21) into the second heat exchange pipeline (22) to exchange heat.
6. The aggregate of claim 5, wherein the energy storage device further comprises:
the second stop valve (13) is positioned between the first port and the refrigerant box (21) and is used for controlling the refrigerant to enter the heat exchange pipeline;
and the second circulating pump (16) is positioned between the second port and the refrigerant box (21) and is used for controlling the refrigerant to circulate between the heat exchange pipeline and the refrigerant box (21).
7. The assembly according to claim 5, wherein the heat exchanger further comprises:
a fan (15);
and an air pipe connected with the fan (15) is introduced into a room needing heat exchange.
8. An air conditioning unit control method applied to the air conditioning unit according to any one of claims 1 to 7, characterized by comprising:
detecting the operation mode of the air conditioning unit;
controlling the running states of the energy storage device and the internal machine according to the running mode; wherein the operating state of the energy storage device at least comprises: an energy storage state, an energy release state, and a shutdown state; the operation state of the internal machine at least comprises: a power-on state and a power-off state.
9. Method according to claim 8, characterized in that said operating mode comprises at least: the heat exchange control system comprises an air conditioning unit independent heat exchange mode, an energy storage device independent heat exchange mode, a simultaneous heat exchange mode, an energy storage device energy storage mode and an energy storage and heat exchange mode; controlling the running states of the energy storage device and the internal machine according to the running mode, comprising:
when the operation mode is the independent heat exchange mode of the air conditioning unit, controlling the energy storage device to enter the shutdown state, and controlling the internal unit to enter the startup state;
when the operation mode is the single heat exchange mode of the energy storage device, the energy storage device is controlled to enter the energy release state, and the internal machine enters the shutdown state;
when the operation mode is the simultaneous heat exchange mode, controlling the energy storage device to enter the energy release state, and controlling the internal machine to enter the starting state;
when the operation mode is the energy storage mode of the energy storage device, controlling the energy storage device to enter the energy storage state, and enabling the internal machine to enter the shutdown state;
and when the operation mode is the energy storage and heat exchange mode, controlling the energy storage device to enter the energy storage state, and controlling the internal machine to enter the starting state.
10. The method of claim 9,
controlling the energy storage device into the energy storage state, comprising: controlling the first circulating pump to be started and controlling the first stop valve to be opened;
controlling the energy storage device into the energy release state, comprising: and controlling the second circulating pump to be started and controlling the second stop valve to be opened.
11. The method of claim 9, wherein after controlling the energy storage device to enter the energy storage state and the internal machine to enter the shutdown state, further comprising:
detecting whether the temperature of a refrigerant box meets a preset temperature condition and/or detecting the starting of the internal machine;
and if so, controlling the energy storage device to enter the shutdown state.
12. The method of claim 9, wherein after controlling the energy storage device to enter the energy storage state and the internal machine to enter the on state, further comprising:
detecting a shutdown signal of the internal machine;
if part of the internal machine is turned off, detecting whether the temperature of the refrigerant box meets a preset temperature condition;
if so, controlling the air conditioning unit to enter an independent heat exchange mode of the energy storage device;
if not, controlling the energy storage device to maintain the energy storage state;
and if all the internal machines are turned off, controlling the air conditioning unit to enter an energy storage mode of the energy storage device.
13. The method according to claim 9, wherein after controlling the internal machine to enter the on state when the operation mode is the air conditioning unit single heat exchange mode, the method further includes:
detecting the suction superheat degree of each indoor unit;
controlling the opening degree of an electronic expansion valve of a corresponding indoor unit according to the suction superheat degree;
judging whether the evaporation load of the internal machine is increased or not;
if yes, controlling the energy storage device to enter the energy release state; wherein, whether the evaporation load of the internal machine is increased is judged by the following conditions: the electronic expansion valve maintains the maximum opening state for a first preset time, the suction superheat degree is lower than a first preset value, and the increase amplitude is smaller than a second preset value.
14. The method of claim 13, further comprising, after controlling the energy storage device into the energy release state:
re-detecting the suction superheat degree of each indoor unit;
judging whether the suction superheat degree of each indoor unit meets the closing condition of the energy storage device or not; wherein the shutdown condition comprises: the suction superheat degree of each indoor unit is all larger than a third preset value and smaller than a fourth preset value within second preset time, and the increased amplitude is smaller than a fifth preset value;
and if so, controlling the energy storage device to be closed.
15. The method of claim 8, further comprising, prior to detecting the operating mode of the air conditioning pack:
monitoring whether a starting signal is received;
if so, controlling the energy storage device to start the energy release mode, and precooling or preheating the indoor space;
and after pre-cooling or pre-heating, controlling the energy storage device to be closed.
16. The method of claim 15, wherein controlling the energy storage device to initiate the energy release mode to pre-cool or pre-heat the chamber comprises:
and controlling the second circulating pump to run at the maximum rotating speed, and controlling the fan to run at the maximum frequency.
17. An air conditioning unit control apparatus characterized by comprising:
the detection module is used for detecting the operation mode of the air conditioning unit;
the control module is used for controlling the running states of the energy storage device and the internal machine according to the running mode; wherein the operating state of the energy storage device at least comprises: an energy storage state and an energy release state shutdown state; the operation state of the internal machine at least comprises: a power-on state and a power-off state.
18. A storage medium containing computer-executable instructions for performing the air conditioning pack control method of any of claims 8 to 16 when executed by a computer processor.
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| CN202010797875.4A CN111947379A (en) | 2020-08-10 | 2020-08-10 | Air conditioning unit capable of effectively utilizing energy and control method and device thereof |
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| CN202010797875.4A CN111947379A (en) | 2020-08-10 | 2020-08-10 | Air conditioning unit capable of effectively utilizing energy and control method and device thereof |
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