CN112178843A - Air conditioning unit with heat storage function and control method thereof - Google Patents
Air conditioning unit with heat storage function and control method thereof Download PDFInfo
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- CN112178843A CN112178843A CN202010995616.2A CN202010995616A CN112178843A CN 112178843 A CN112178843 A CN 112178843A CN 202010995616 A CN202010995616 A CN 202010995616A CN 112178843 A CN112178843 A CN 112178843A
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/24—Storage receiver heat
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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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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning unit with a heat storage function and a control method thereof, wherein the air conditioning unit comprises a control device, and a mechanical refrigeration mechanism, a centrifugal fan and a heat storage mechanism which are respectively and electrically connected with the control device, the mechanical refrigeration mechanism comprises an evaporator, the evaporator is arranged on the air outlet side of the centrifugal fan, the heat storage mechanism comprises a three-way valve, a fluid pump, a heater, a heat exchanger and a heat storage device, the heat exchanger is arranged on the air outlet side of the centrifugal fan, the three-way valve is respectively connected with the heat exchanger, the fluid pump and the heat storage device, and the fluid pump, the heater and the heat storage device are sequentially connected; according to the air conditioning unit with the heat storage function, the lever effect between the distribution power and the heating load of the air conditioning unit is realized through the heat storage device, the power supply requirement of the air conditioning unit can be greatly reduced while effective heating is realized, and the energy loss is reduced.
Description
Technical Field
The invention relates to the technical field of air conditioning units, in particular to an air conditioning unit with a heat storage function and a control method thereof.
Background
The traditional air conditioning unit generally adopts the forms of heat pump, air electric heating, hot water heating, steam heating and the like, except that the form of the heat pump can realize the heating efficiency more than 1 and can adopt low-capacity power distribution, other electric heating modes all need to adopt the power distribution capacity which is almost different from the heat supply; if the air duct type electric heating mode is adopted, the working power of the electric heater is greater than or equal to 100kW under the assumption that the heat supply amount of 100kW per hour is realized, and the requirement of the power distribution capacity of the air conditioning unit is large.
For a traditional airplane ground air conditioning unit, the conventional airplane ground air conditioning unit generally does not have a heating function and has the condition of limited power distribution; if the heat pump mode is adopted for heating, the problems that an air conditioning unit is unstable in operation, the temperature inside the airplane is slowly raised and the like exist, and comfortable environment guarantee is difficult to provide for passengers in the airplane.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an air conditioning unit with a heat storage function, which realizes the lever effect between the distribution power and the heating load of the air conditioning unit through a heat storage device, realizes effective heating and greatly reduces the power supply requirement of the air conditioning unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an air conditioning unit with heat accumulation function, includes controlling means and respectively with controlling means electric connection's mechanical refrigeration mechanism, centrifugal fan and heat accumulation mechanism, mechanical refrigeration mechanism includes the evaporimeter, the evaporimeter set up in centrifugal fan's air-out side, heat accumulation mechanism includes three-way valve, fluid pump, heater, heat exchanger and heat accumulation device, the heat exchanger set up in centrifugal fan's air-out side, the three-way valve respectively with heat exchanger, fluid pump and heat accumulation device connect, fluid pump, heater and heat accumulation device connect gradually.
In the air conditioning unit with the heat storage function, the mechanical refrigeration mechanism further comprises a compressor, a condensation part, a filter and a throttling device, wherein the compressor, the condensation part, the filter, the throttling device and the evaporator are sequentially connected end to end; the throttling device and the compressor are respectively electrically connected with the control device.
In the air conditioning unit with the heat storage function, the condensing part comprises a condenser, an axial flow fan and a first temperature controller, and the condenser is respectively connected with the compressor and the filter; the axial flow fan and the first temperature controller are respectively arranged on one side of the condenser, the axial flow fan is used for cooling the heat dissipation air of the condenser, and the first temperature controller is used for detecting the temperature of the heat dissipation air of the condenser; the axial flow fan and the first temperature controller are respectively electrically connected with the control device.
In the air conditioning unit with the heat storage function, the heat storage mechanism further comprises a second temperature controller, a third temperature controller and a fourth temperature controller which are respectively electrically connected with the control device; the fourth temperature controller is used for detecting the temperature of a heat storage medium in the heat storage device, the second temperature controller is used for detecting the air temperature of the air inlet side of the air conditioning unit, and the third temperature controller is used for detecting the air temperature of the indoor environment.
In the air conditioning unit with the heat storage function, the heat storage mechanism further comprises an electric tracing device, the electric tracing device is arranged on a connecting pipeline of the heat storage device and the three-way valve, and the electric tracing device is electrically connected with the control device.
The present invention also accordingly provides a control method for an air conditioning unit with a heat storage function, the control method being for controlling the air conditioning unit with a heat storage function as described in any one of the above, the heat storage mechanism including a fourth temperature controller for detecting the temperature of a heat storage medium inside the heat storage device, the control method including the steps of:
when the air conditioning unit executes the heat storage mode, the control device controls the three-way valve to be adjusted to the bypass mode and controls the fluid pump and the heater to start working, the heat storage medium enters the heater from the heat storage device to be heated under the driving of the fluid pump, the heated heat storage medium returns to the heat storage device, and when the temperature of the heat storage medium detected by the fourth temperature controller is larger than or equal to the heat storage highest temperature preset in the control device, the control device controls the fluid pump to be closed and controls the heater to stop working;
when the air conditioner executes a heat release mode, the control device controls the three-way valve to be adjusted to a main path mode or a partial bypass operation mode and controls the fluid pump, the heater and the centrifugal fan to start working, a part of heat storage media enters the heater from the heat storage device to be heated under the driving of the fluid pump, and the heated heat storage media return to the heat storage device; and part of the heat storage medium enters the heat exchanger from the heat storage device to heat the air entering the air conditioning unit, and the heat storage medium after heat release returns to the heater to be heated under the driving of the fluid pump and then enters the heat storage device again.
In the control method of the air conditioning unit with the heat storage function, the mechanical refrigeration mechanism further comprises a compressor, a condensing part, a filter and a throttling device; the control method further comprises the steps of:
when the air conditioning unit executes a mechanical refrigeration mode, the control device controls the compressor, the centrifugal fan, the filter and the throttling device to be opened, the refrigerant enters the condensing part for condensation and cooling after being pressurized by the compressor, the refrigerant liquid after condensation and cooling respectively controls the flow through the filter and the throttling device and then is input into the evaporator, and external air enters the air conditioning unit through the centrifugal fan and exchanges heat with the evaporator; the refrigerant gas after the temperature rise is returned to the compressor.
In the method for controlling the air conditioning unit with the heat storage function, the control device controls the three-way valve to be adjusted to the bypass mode and controls the fluid pump and the heater to start working, and the method specifically comprises the following steps:
the control device controls the three-way valve to be adjusted to a bypass mode and controls the heater to start working;
the control device adjusts the working frequency of the fluid pump according to the real-time temperature detection value of the fourth temperature controller and the difference value between the preset heat storage maximum temperature.
In the control method of the air conditioning unit with the heat storage function, the air conditioning unit further comprises an electric tracing device and a third temperature controller, the electric tracing device is arranged on a connecting pipeline between the heat storage device and the three-way valve, the third temperature controller is used for detecting the air temperature of the indoor environment, and the electric tracing device and the third temperature controller are respectively electrically connected with the control device; the control method further comprises the steps of:
when the heater is in a state of stopping working, the control device controls the electric tracing device to start or stop working according to the temperature value fed back by the third temperature controller, and the electric tracing device heats the pipeline.
The control method of the air conditioning unit with the heat storage function further comprises the following steps:
when the air conditioning unit executes an intermittent operation state, the control device intermittently controls the three-way valve to be adjusted to a main path mode or a partial bypass operation mode and controls the fluid pump, the heater and the centrifugal fan to intermittently operate, and the control device controls the working frequency of the fluid pump according to the detection temperature value of the third temperature controller;
when the detected temperature value of the third temperature controller gradually decreases towards zero, the control device controls the working frequency of the fluid pump to increase;
when the working frequency of the fluid pump is increased for a certain time, the detection temperature value of the third temperature controller is still gradually reduced towards zero, and the control device controls the air conditioning unit to stop working.
Has the advantages that:
the invention provides an air conditioning unit with a heat storage function, which comprises a heat storage device for storing a heat storage medium, wherein when a heat release mode is actually executed, the heat storage medium is input into a heat exchanger from the heat storage device to heat air, and the heat storage medium is heated by a heater and then returns to the heat storage device; the heat storage device stores a high-temperature heat storage medium in advance, so that the work load of the heater can be reduced, namely, the lever effect between the distribution power and the heating load of the air conditioning unit is realized through the heat storage device, the power supply requirement of the air conditioning unit can be greatly reduced while effective heating is realized, and the energy loss is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioning unit with a heat storage function according to the present invention.
Description of the main element symbols: 11-evaporator, 12-compressor, 13-condensing part, 131-condenser, 132-axial flow fan, 133-first temperature controller, 14-filter, 15-throttling device, 2-centrifugal fan, 31-three-way valve, 32-fluid pump, 33-heater, 34-heat exchanger, 35-heat storage device, 36-second temperature controller, 37-third temperature controller, 38-fourth temperature controller and 39-electric heat tracing device.
Detailed Description
The invention provides an air conditioning unit with a heat storage function and a control method thereof, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and the like are to be interpreted broadly, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
Referring to fig. 1, the present invention provides an air conditioning unit with a heat storage function, including a control device, and a mechanical refrigeration mechanism, a centrifugal fan 2 and a heat storage mechanism which are electrically connected to the control device, respectively, where the mechanical refrigeration mechanism includes an evaporator 11, the evaporator 11 is disposed on an air outlet side of the centrifugal fan 2, the heat storage mechanism includes a three-way valve 31, a fluid pump 32, a heater 33, a heat exchanger 34 and a heat storage device 35, the heat exchanger 34 is disposed on the air outlet side of the centrifugal fan 2, the three-way valve 31 is connected to the heat exchanger 34, the fluid pump 32 and the heat storage device 35, and the fluid pump 32, the heater 33 and the heat storage device 35 are sequentially connected.
The air conditioning unit with the heat storage function comprises a mechanical refrigeration mechanism for cooling the outside air so as to realize a heat storage mechanism with heat storage and release functions, namely the air conditioning unit can also heat the outside air; when the mechanical refrigeration mode is executed, the low-temperature refrigerant liquid in the evaporator 11 absorbs heat from the outside air to cool the outside air; when the heat storage mode is performed, the control device controls the three-way valve 31 to be adjusted to the bypass mode and controls the fluid pump 32 and the heater 33 to start working, the heat storage medium enters the heater 33 from the heat storage device 35 to be heated under the driving of the fluid pump 32, and the heated heat storage medium returns to the heat storage device 35 to circulate continuously until the heat storage is completed; when the heat release mode is performed, the control device controls the three-way valve 31 to adjust to the main path mode or the partial bypass operation mode and controls the fluid pump 32, the heater 33 and the centrifugal fan 2 to start working, part of the heat storage medium enters the heater 33 from the heat storage device 35 to be heated under the driving of the fluid pump 32, and the heated heat storage medium returns to the heat storage device 35; part of the heat storage medium enters the heat exchanger 34 from the heat storage device 35 to heat the outside air, and the heat storage medium after heat release returns to the heater 33 to be heated under the driving of the fluid pump 32, and then enters the heat storage device 35 again to circulate continuously until the heat release task is completed.
The air conditioning unit disclosed by the application comprises a heat storage device 35 for storing a heat storage medium, wherein when a heat release mode is actually executed, the heat storage medium is input into a heat exchanger 34 from the heat storage device 35 to heat air, and the heat storage medium is heated by a heater 33 and then returns to the heat storage device 35; because the heat storage device 35 stores a high-temperature heat storage medium in advance, the work load of the heater 33 can be reduced, namely, the lever effect between the distribution power and the heating load of the air conditioning unit is realized through the heat storage device 35, the power supply requirement of the air conditioning unit can be greatly reduced while effective heating is realized, and according to the difference between the daily work and rest time of the air conditioning unit, if the air conditioning unit works for 12 hours, the heat release distribution power can be reduced by 50% by adopting the air conditioning unit disclosed by the application, and the energy loss is reduced; in addition, the air conditioning unit that this application provided can execute mechanical refrigeration mode, heat accumulation mode and heat release mode, has improved air conditioning unit's suitability.
Further, the air conditioning unit with the heat storage function disclosed by the application can also execute a ventilation mode, when the air conditioning unit executes the ventilation mode, the control device controls the compressor 12, the axial flow fan 132, the first throttling device 15, the fluid pump 32 and the heater 33 to be closed, the control device controls the centrifugal fan 2 to be opened, outdoor fresh air is input into the air conditioning unit through the centrifugal fan 2, and the outdoor fresh air is input into an indoor environment after being subjected to air purification through an air purification device arranged in the air conditioning unit.
Further, referring to fig. 1, the mechanical refrigeration mechanism further includes a compressor 12, a condensing portion 13, a filter 14, and a throttling device 15, wherein the compressor 12, the condensing portion 13, the filter 14, the throttling device 15, and the evaporator 11 are sequentially connected end to end; the throttling device 15 and the compressor 12 are electrically connected to the control device respectively.
Further, referring to fig. 1, the condensing portion 13 includes a condenser 131, an axial flow fan 132 and a first temperature controller 133, wherein the condenser 131 is connected to the compressor 12 and the filter 14 respectively; the axial flow fan 132 and the first temperature controller 133 are respectively disposed at one side of the condenser 131, the axial flow fan 132 is configured to cool the heat dissipation air of the condenser 131, and the first temperature controller 133 is configured to detect the temperature of the heat dissipation air of the condenser 131; the axial flow fan 132 and the first temperature controller 133 are electrically connected to the control device respectively.
When the air conditioning unit executes a mechanical refrigeration mode, the control device controls the compressor 12, the centrifugal fan 2, the filter 14 and the throttling device 15 to be opened, refrigerant is pressurized by the compressor 12 to form high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas is input into the condensing part 13 to be condensed and cooled, the refrigerant liquid after being condensed and cooled is input into the evaporator 11 after the flow is controlled by the filter 14 and the throttling device 15 respectively, and external air enters the air conditioning unit through the centrifugal fan 2 and exchanges heat with the evaporator 11; the refrigerant gas having been heated is returned to the compressor 12.
Further, referring to fig. 1, the heat storage mechanism further includes a second temperature controller 36, a third temperature controller 37 and a fourth temperature controller 38, which are electrically connected to the control device, respectively; the fourth temperature controller 38 is used to detect the temperature of the heat storage medium in the heat storage device 35, the second temperature controller 36 is used to detect the air temperature on the inlet side of the air conditioning unit, and the third temperature controller 37 is used to detect the air temperature of the indoor environment.
When the third temperature controller 37 detects that the air temperature of the indoor environment is less than or equal to the lowest temperature of the mechanical refrigeration mode preset in the control device, the control device controls the air conditioning unit to stop the mechanical refrigeration mode; when the third temperature controller 37 detects that the air temperature of the indoor environment is greater than or equal to the highest temperature of the mechanical refrigeration mode preset in the control device, the control device controls the air conditioning unit to execute the mechanical refrigeration mode; when the third temperature controller 37 detects that the air temperature of the indoor environment is less than or equal to the lower limit temperature of the heat release mode preset in the control device, the control device controls the air conditioning unit to execute the heat release mode; when the third temperature controller 37 detects that the air temperature of the indoor environment is greater than or equal to the upper limit temperature of the heat release mode preset in the control device, the control device controls the air conditioning unit to stop the heat release mode.
Further, referring to fig. 1, the heat storage mechanism further includes an electric heat tracing device 39, the electric heat tracing device 39 is disposed on a connection pipeline between the heat storage device 35 and the three-way valve 31, the electric heat tracing device 39 is electrically connected to a control device, and the electric heat tracing device 39 is used for preventing the pipeline from frosting.
Referring to fig. 1, the present invention also provides a control method of an air conditioning unit with a heat storage function, the control method is used for controlling the air conditioning unit with a heat storage function, the heat storage mechanism comprises a fourth temperature controller 38, the fourth temperature controller 38 is used for detecting the temperature of a heat storage medium in a heat storage device 35, and the control method comprises the following steps:
referring to fig. 1, when the air conditioning unit executes the heat storage mode, the control device controls the three-way valve 31 to adjust to the bypass mode and controls the fluid pump 32 and the heater 33 to start operating, the heat storage medium enters the heater 33 from the heat storage device 35 to be heated under the driving of the fluid pump 32, the heated heat storage medium returns to the heat storage device 35, and the circulation is restarted; when the temperature of the heat storage medium detected by the fourth temperature controller 38 is greater than or equal to the heat storage maximum temperature preset in the control device, the control device controls the fluid pump 32 to be turned off and controls the heater 33 to stop operating.
Referring to fig. 1, when the air conditioner performs the heat release mode, the control device controls the three-way valve 31 to adjust to the main path mode or the partial bypass operation mode and controls the fluid pump 32, the heater 33, and the centrifugal fan 2 to start operating; part of the heat storage medium enters the heater 33 from the heat storage device 35 to be heated under the driving of the fluid pump 32, and the heated heat storage medium returns to the heat storage device 35 to start circulation again; part of the heat storage medium enters the heat exchanger 34 from the heat storage device 35 to heat the air entering the air conditioning unit, the heat storage medium after heat release returns to the heater 33 to be heated under the driving of the fluid pump 32, and then enters the heat storage device 35 again to start circulation again; when the third temperature controller 37 detects that the air temperature of the indoor environment is less than or equal to the lower limit temperature of the heat release mode preset in the control device, the control device controls the air conditioning unit to execute the heat release mode; when the third temperature controller 37 detects that the air temperature of the indoor environment is greater than or equal to the upper limit temperature of the heat release mode preset in the control device, the control device controls the air conditioning unit to stop the heat release mode.
Further, referring to fig. 1, the mechanical refrigeration mechanism further includes a compressor 12, a condensing portion 13, a filter 14, and a throttling device 15; the control method further comprises the steps of:
when the air conditioning unit executes a mechanical refrigeration mode, the control device controls the compressor 12, the centrifugal fan 2, the filter 14 and the throttling device 15 to be opened, a refrigerant enters the condensing part 13 for condensation and cooling after being pressurized by the compressor 12, the refrigerant liquid after condensation and cooling is input into the evaporator 11 after the flow is controlled by the filter 14 and the throttling device 15 respectively, and external air enters the air conditioning unit through the centrifugal fan 2 and exchanges heat with the evaporator 11; the refrigerant in the evaporator 11 absorbs heat and rises in temperature, turns into refrigerant gas, returns to the compressor 12, and restarts the cycle; when the third temperature controller 37 detects that the air temperature of the indoor environment is less than or equal to the lowest temperature of the mechanical refrigeration mode preset in the control device, the control device controls the air conditioning unit to stop the mechanical refrigeration mode; when the third temperature controller 37 detects that the air temperature of the indoor environment is greater than or equal to the maximum temperature of the mechanical cooling mode preset in the control device, the control device controls the air conditioning unit to perform the mechanical cooling mode.
Further, referring to fig. 1, the control device controls the three-way valve 31 to be adjusted to the bypass mode and controls the fluid pump 32 and the heater 33 to start working, which specifically includes the steps of:
the control device controls the three-way valve 31 to be adjusted to the bypass mode and controls the heater 33 to start working;
the control device adjusts the working frequency of the fluid pump 32 according to the difference between the real-time temperature detection value of the fourth temperature controller 38 and the preset heat storage maximum temperature; when the difference value between the real-time temperature detection value and the heat storage maximum temperature is larger, the control device controls the working frequency of the fluid pump 32 to be increased, and the flow of the heat storage medium is increased; when the difference between the real-time temperature detection value and the heat storage maximum temperature is reduced, the control device controls the working frequency of the fluid pump 32 to be reduced, the flow of the heat storage medium is reduced, and heat storage is gradually completed.
Further, referring to fig. 1, the air conditioning unit further includes an electric heat tracing device 39 and a third temperature controller 37, the electric heat tracing device 39 is disposed on a connection pipeline between the heat storage device 35 and the three-way valve 31, the third temperature controller 37 is configured to detect an air temperature of an indoor environment, and the electric heat tracing device 39 and the third temperature controller 37 are respectively electrically connected to the control device; the control method further comprises the steps of:
when the heater 33 is in a state of stopping working, the control device controls the electric tracing heater 39 to start or stop working according to the temperature value fed back by the third temperature controller 37, and the electric tracing heater 39 heats the pipeline; specifically, when in winter, an anti-freezing temperature is set in the control device in advance, and when the heater 33 is in a stop state and the real-time temperature detection value of the third temperature controller 37 is less than or equal to the anti-freezing temperature, the control device controls the electric tracing device 39 to start to operate, so that the electric tracing device 39 heats the pipeline and prevents the pipeline from freezing.
Further, the control method of the air conditioning unit with the heat storage function further comprises the following steps:
when the air conditioning unit executes an intermittent operation state, the control device intermittently controls the three-way valve 31 to adjust to a main path mode or a partial bypass operation mode and controls the fluid pump 32, the heater 33 and the centrifugal fan 2 to intermittently operate, and the control device controls the working frequency of the fluid pump 32 according to the detection temperature value of the third temperature controller 37; the intermittent operation refers to that the air conditioning unit executes or stops the heat release mode at intervals, for example, the air conditioning unit stops executing the heat release mode after executing the heat release mode for 30 minutes, and executes the heat release mode again after stopping executing the heat release mode for 30 minutes, and the cycle is continuous.
When the detected temperature value of the third temperature controller 37 gradually decreases toward zero, the control device controls the operating frequency of the fluid pump 32 to increase.
When the working frequency of the fluid pump 32 is increased for a certain time, and the detected temperature value of the third temperature controller 37 is still gradually decreased toward zero, the control device controls the air conditioning unit to stop working, so as to ensure the safe operation of the air conditioning unit; in one embodiment, the certain time may be 5 minutes.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (10)
1. The utility model provides an air conditioning unit with heat accumulation function, its characterized in that, include controlling means and respectively with controlling means electric connection's mechanical refrigeration mechanism, centrifugal fan and heat accumulation mechanism, mechanical refrigeration mechanism includes the evaporimeter, the evaporimeter set up in centrifugal fan's air-out side, heat accumulation mechanism includes three-way valve, fluid pump, heater, heat exchanger and heat accumulation device, the heat exchanger set up in centrifugal fan's air-out side, the three-way valve respectively with heat exchanger, fluid pump and heat accumulation device are connected, fluid pump, heater and heat accumulation device connect gradually.
2. The air conditioning unit with the heat storage function according to claim 1, wherein the mechanical refrigeration mechanism further comprises a compressor, a condensing part, a filter and a throttling device, and the compressor, the condensing part, the filter, the throttling device and the evaporator are connected end to end in sequence; the throttling device and the compressor are respectively electrically connected with the control device.
3. The air conditioning unit with the heat storage function according to claim 2, wherein the condensation portion includes a condenser, an axial flow fan, and a first temperature controller, the condenser being connected to the compressor and the filter, respectively; the axial flow fan and the first temperature controller are respectively arranged on one side of the condenser, the axial flow fan is used for cooling the heat dissipation air of the condenser, and the first temperature controller is used for detecting the temperature of the heat dissipation air of the condenser; the axial flow fan and the first temperature controller are respectively electrically connected with the control device.
4. The air conditioning unit with the heat storage function according to claim 1, wherein the heat storage mechanism further includes a second temperature controller, a third temperature controller, and a fourth temperature controller electrically connected to the control device, respectively; the fourth temperature controller is used for detecting the temperature of a heat storage medium in the heat storage device, the second temperature controller is used for detecting the air temperature of the air inlet side of the air conditioning unit, and the third temperature controller is used for detecting the air temperature of the indoor environment.
5. The air conditioning unit with the heat storage function according to claim 4, wherein the heat storage mechanism further includes an electric heat tracing device, the electric heat tracing device is disposed on a connection pipe between the heat storage device and the three-way valve, and the electric heat tracing device is electrically connected to a control device.
6. A control method of an air conditioning unit having a heat storage function, characterized by being used for controlling the air conditioning unit having a heat storage function according to any one of claims 1 to 5, the heat storage mechanism including a fourth temperature controller for detecting the temperature of a heat storage medium inside a heat storage device, the control method comprising the steps of:
when the air conditioning unit executes the heat storage mode, the control device controls the three-way valve to be adjusted to the bypass mode and controls the fluid pump and the heater to start working, the heat storage medium enters the heater from the heat storage device to be heated under the driving of the fluid pump, the heated heat storage medium returns to the heat storage device, and when the temperature of the heat storage medium detected by the fourth temperature controller is larger than or equal to the heat storage highest temperature preset in the control device, the control device controls the fluid pump to be closed and controls the heater to stop working;
when the air conditioner executes a heat release mode, the control device controls the three-way valve to be adjusted to a main path mode or a partial bypass operation mode and controls the fluid pump, the heater and the centrifugal fan to start working, a part of heat storage media enters the heater from the heat storage device to be heated under the driving of the fluid pump, and the heated heat storage media return to the heat storage device; and part of the heat storage medium enters the heat exchanger from the heat storage device to heat the air entering the air conditioning unit, and the heat storage medium after heat release returns to the heater to be heated under the driving of the fluid pump and then enters the heat storage device again.
7. The control method of an air conditioning unit with a heat storage function according to claim 6, wherein the mechanical refrigeration mechanism further includes a compressor, a condenser, a filter, and a throttle device; the control method further comprises the steps of:
when the air conditioning unit executes a mechanical refrigeration mode, the control device controls the compressor, the centrifugal fan, the filter and the throttling device to be opened, the refrigerant enters the condensing part for condensation and cooling after being pressurized by the compressor, the refrigerant liquid after condensation and cooling respectively controls the flow through the filter and the throttling device and then is input into the evaporator, and external air enters the air conditioning unit through the centrifugal fan and exchanges heat with the evaporator; the refrigerant gas after the temperature rise is returned to the compressor.
8. The method as claimed in claim 6, wherein the control device controls the three-way valve to be adjusted to the bypass mode and controls the fluid pump and the heater to start operating, and comprises the following steps:
the control device controls the three-way valve to be adjusted to a bypass mode and controls the heater to start working;
the control device adjusts the working frequency of the fluid pump according to the real-time temperature detection value of the fourth temperature controller and the difference value between the preset heat storage maximum temperature.
9. The method as claimed in claim 6, wherein the air conditioning unit further comprises an electric heat tracing device disposed on a connection pipe between the heat storage device and the three-way valve, and a third temperature controller for detecting an air temperature of an indoor environment, the electric heat tracing device and the third temperature controller being electrically connected to the control device, respectively; the control method further comprises the steps of:
when the heater is in a state of stopping working, the control device controls the electric tracing device to start or stop working according to the temperature value fed back by the third temperature controller, and the electric tracing device heats the pipeline.
10. The method for controlling an air conditioning unit with a heat storage function according to claim 9, characterized by further comprising the steps of:
when the air conditioning unit executes an intermittent operation state, the control device intermittently controls the three-way valve to be adjusted to a main path mode or a partial bypass operation mode and controls the fluid pump, the heater and the centrifugal fan to intermittently operate, and the control device controls the working frequency of the fluid pump according to the detection temperature value of the third temperature controller;
when the detected temperature value of the third temperature controller gradually decreases towards zero, the control device controls the working frequency of the fluid pump to increase;
when the working frequency of the fluid pump is increased for a certain time, the detection temperature value of the third temperature controller is still gradually reduced towards zero, and the control device controls the air conditioning unit to stop working.
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| CN202010995616.2A CN112178843A (en) | 2020-09-21 | 2020-09-21 | Air conditioning unit with heat storage function and control method thereof |
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| CN202010995616.2A CN112178843A (en) | 2020-09-21 | 2020-09-21 | Air conditioning unit with heat storage function and control method thereof |
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