CN116255694A - Air conditioner heated by condensation heat recovery device and control method - Google Patents

Air conditioner heated by condensation heat recovery device and control method Download PDF

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Publication number
CN116255694A
CN116255694A CN202310189808.8A CN202310189808A CN116255694A CN 116255694 A CN116255694 A CN 116255694A CN 202310189808 A CN202310189808 A CN 202310189808A CN 116255694 A CN116255694 A CN 116255694A
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air
heat recovery
air conditioner
recovery device
temperature
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高永强
李玲玲
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Tianjin Aowei Environmental Control Equipment Co ltd
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Tianjin Aowei Environmental Control Equipment Co ltd
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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
    • F24F5/0003—Exclusively-fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • 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
    • F25B39/00—Evaporators; Condensers
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
    • 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]
    • Y02B30/56—Heat recovery units

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to an air conditioner heated by a condensation heat recovery device and a control method thereof, comprising the following steps: a ventilation box and a refrigerant circulation circuit; an evaporator coil, a humidifier, a heater, a blower and an auxiliary electric heater are sequentially arranged in the ventilation box from the return air inlet to the air supply outlet; the heater is composed of an air flow regulating device and a condenser, and the condensing heat recovery device regulates the heating quantity by regulating the air flow passing through the condenser. The invention utilizes the air conditioner heated by the condensation heat recovery device, uses the condensation heat of the air conditioner as a main heat source for heating the air conditioner, realizes 0-100% adjustment of recyclable heat, greatly reduces the auxiliary electric heating energy consumption and improves the energy utilization rate of the air conditioner; the condensing heat recovery device can realize rapid and continuous adjustment of heating quantity by rapidly adjusting the air quantity flowing through the condenser, and has high heating adjustment precision and high degree of available condensing heat; the energy saving is remarkable and the control precision is high.

Description

Air conditioner heated by condensation heat recovery device and control method
Technical Field
The invention relates to air conditioning equipment, in particular to an air conditioner heated by a condensation heat recovery device.
Background
In the prior art, the temperature and humidity reducing and dehumidifying process of the high-precision constant temperature and humidity air conditioner comprises the following steps: in the process of flowing through the evaporator coil, cooling is realized by increasing the refrigerating capacity of the unit by increasing the refrigerant flow of the evaporator coil; the circulating air quantity of the air conditioner is further reduced or the refrigerating capacity of the air conditioner is improved, so that the temperature of the air is reduced below the temperature at which the humidity reaches a saturated state, and redundant water vapor in the air is condensed into liquid water on the surface of an evaporator and is discharged out of the system through a water collecting disc and a drainage channel; the absolute target moisture content is regulated by a humidifier, and then the temperature is increased by the recovery heating of the condensing heat of the air conditioner, and the auxiliary electric heating is precisely regulated to the target temperature. Disadvantages in the prior art: all air flows through the heat recovery condenser or the heat recovery water coil after passing through the evaporator, and the resistance is large, and the energy consumption of the air blower is high; the heat recovery device has slower temperature control and adjustment speed, poorer linearity and lower adjustment precision.
The traditional high-precision air conditioner has the advantages that the heat exchange quantity of the water coil, the evaporator and other parts is slow in adjusting response, the refrigerating and dehumidifying adjusting process is required to be performed through excessive refrigerating/dehumidifying, and then the air supply temperature and humidity are controlled accurately through the electric heating humidifier and auxiliary electric heating to be quickly adjusted to target values.
The existing double-condenser heat recovery structure, the water coil pipe with the water-fluorine heat exchanger and the refrigerant double-coil pipe heat recovery structure are adopted, air-conditioning airflow completely passes through the heat recovery coil pipe, the heat capacity of the refrigerant coil pipe and the water coil pipe is larger, the heat control inertia is stronger, the response speed is slower, the auxiliary electric heating heat is reduced, the condensation heat utilization rate is not high, the resistance of the blower is increased, the electric heating load is larger, and the air-conditioning energy consumption is higher. Therefore, there is a need for a constant temperature and humidity open air conditioner with a novel cooling and dehumidifying device to solve the above-mentioned problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the air conditioner which is low in running cost and high in precision temperature and humidity control and is heated by the condensation heat recovery device.
The technical scheme adopted by the invention is as follows:
an air conditioner heated by a condensation heat recovery apparatus, comprising: a ventilation box and a refrigerant circulation circuit; the refrigerant cycle circuit includes: the device comprises a compressor, a condensation heat recovery device, an air-cooled condenser/water fluorine heat exchanger, a drying filter, a liquid mirror, a throttling device and an evaporator coil;
the ventilation box is provided with an air return opening and an air supply opening;
an evaporator coil, a humidifier, a heater, an auxiliary electric heater and a blower are sequentially arranged in the ventilation box from the return air inlet to the air supply inlet;
the air return opening and the air supply opening are respectively communicated with the target space;
the water collecting disc is positioned at the lower part of the evaporator coil;
a condensation heat recovery device is arranged in the ventilation box;
the condensing heat recovery device is positioned between the evaporator coil and the air supply outlet;
the condensation heat recovery device comprises an internal condenser and an airflow regulating device;
the refrigerant inlet and outlet pipes of the internal condenser are respectively connected with the compressor and the air-cooled condenser/water fluorine heat exchanger;
the internal condenser is connected with the airflow adjusting device.
The air flow regulating device is a proportional air valve.
The air flow regulating device is a speed regulating fan.
A control method of an air conditioner heated by a condensation heat recovery device,
when the air conditioning system has no heating requirement, the proportional air valve is closed, and the circulating air flow of the air conditioner does not flow through the internal condenser of the condensation heat recovery device;
when the air conditioning system has heating requirements, the condensing heat recovery device realizes the rapid and continuous adjustment of the air quantity passing through the condenser through the adjustment of the analog quantity of the comparative air valve, and further realizes the continuous adjustment of the heating quantity (0-100% of recyclable heat).
When the air conditioning system has no heating requirement, the variable frequency fan is closed, and the circulating airflow of the air conditioner does not flow through the internal condenser of the condensation heat recovery device;
when the air conditioning system has heating requirements, the condensing heat recovery device realizes continuous and rapid adjustment of the air quantity passing through the condenser through adjustment of the analog quantity of the speed adjusting fan, and further realizes continuous adjustment of heating quantity (0-100% of recyclable heat).
An air conditioner precisely heated by a condensation heat recovery device, comprising: a ventilation box and a refrigerant circulation circuit;
the ventilation box is provided with an air return opening and an air supply opening;
an evaporator coil, a humidifier, a heater, an auxiliary electric heater and a blower are sequentially arranged in the ventilation box from the return air inlet to the air supply inlet;
the air return opening and the air supply opening are respectively communicated with the target space;
the water collecting disc is positioned at the lower part of the evaporator coil;
the ventilation box comprises: mixing the primary area, the surface cooling area, the heating area, the humidifying area, the fan area and the auxiliary heating area;
the heating area is provided with a heater;
the humidifying area is provided with a humidifier;
the fan area is provided with a fan;
the auxiliary heating area is provided with an auxiliary heater,
the heating area comprises a proportional air valve and an internal condenser;
the proportional air valve is tightly connected with the condenser;
the refrigerant inlet and outlet pipes of the condenser are respectively connected with the compressor and the outdoor condenser.
The air passes through the condensation heat recovery device, the air quantity flowing through the condenser of the condensation heat recovery device is adjusted by the proportional air valve to realize continuous adjustment of heating quantity (0-100% of recyclable heat), after the air reaches the air supply temperature of a fan required by a system, the air outlet temperature of the air conditioner is adjusted by the auxiliary electric heater to meet the air supply temperature of the air conditioner, and then the air is sent into a target space;
the proportional air valve of the condensing heat recovery device adjusts the air quantity flowing through the condenser to realize the adjustment of heating quantity, and an external condenser tube device controlled by an stepless speed regulating fan is adopted to maintain the normal range of condensing pressure;
when the pressure of the outdoor condensing system is higher than the stall pressure of the set running condensing pressure fan by +60kpa, the heating quantity of the internal condensing heat recovery device is reduced by gradually reducing the air quantity flowing through the internal condenser; the heating quantity of the internal condensation heat recovery device is increased by gradually increasing the air quantity flowing through the internal condenser;
when the pressure of the outdoor condensing system is reduced to be less than or equal to the set running condensing pressure fan stall pressure +60kpa, (20-150 kpa is set according to the control precision of the air conditioner, the higher the control precision is, the larger the set value is), the air quantity flowing through the internal condenser is stopped to be increased so as to be used as the maximum heating quantity of the condensing heat recovery device;
when the condensing pressure is reduced to be less than or equal to the set running condensing pressure fan stall pressure +20kpa, the air quantity flowing through the internal condenser is gradually reduced, so that the heating quantity of the condensing heat recovery device is reduced, the pressure of the outdoor condensing system is kept to be more than or equal to the running condensing pressure fan stall pressure +60deg.kpa, and good running of the refrigerating system is ensured.
The refrigeration control steps are as follows:
a) Cooling by an air conditioner: the control system increases the flow of the throttling device refrigerant/chilled water stepwise; the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is lower than the saturation humidity temperature corresponding to the absolute humidity content required by the air of the control target space (usually 0.1-0.5 ℃ and set according to the humidity control precision requirement of the air conditioner) and the cold air ratio configuration;
the air quantity flowing through the internal condenser is adjusted through a proportional air valve of the condensation heat recovery device to realize the adjustment of heating quantity, the air is heated and adjusted to be slightly less than the air outlet temperature of the fan (usually 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system requires the air supply temperature, and finally the air outlet temperature of the air conditioner is adjusted through the auxiliary electric heater to meet the air supply temperature of the air conditioner and then is sent into a target space;
b) Heating up an air conditioner:
the control system reduces the flow of refrigerant/chilled water by adjusting the air flow adjustment device; the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is smaller than (usually 0.1-0.5 ℃ is selected and set according to the humidity control precision requirement of the air conditioner and the cold air ratio configuration) the temperature of saturated humidity corresponding to the absolute humidity required by the air in the control target space;
the air quantity flowing through the condenser of the condensing heat recovery device is adjusted through adjusting the humidifier, the heating quantity is adjusted through adjusting the proportional air valve of the condensing heat recovery device, the air is heated and adjusted to be slightly smaller than the air outlet temperature of the fan (generally, the temperature is set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner) and the air outlet temperature of the air conditioner is adjusted through the auxiliary electric heater, and the air is fed into the target space after the air outlet temperature of the air conditioner meets the air supply temperature of the air conditioner.
The dehumidification control steps are as follows:
a) Cooling by an air conditioner:
the control system increases the flow rate of the refrigerant/chilled water by adjusting the air flow adjusting device; the air supply fan of the air conditioner keeps constant output;
the temperature of the air outlet flowing through the coil is always guaranteed to be lower than (usually 0.5-2 ℃ is selected and adjusted according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner, meanwhile, the temperature of the coil is kept higher than 0 ℃ and the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the target space is controlled, the air is adjusted through a humidifier, the air quantity flowing through a condenser of the condenser is adjusted through a proportional air valve of a condensation heat recovery device to realize heating quantity adjustment, the air heating is adjusted to be slightly lower than the air outlet temperature of a fan (usually 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system requires the air supply temperature, and finally, the air outlet temperature of the air conditioner is adjusted through an auxiliary electric heater to meet the air supply temperature of the air conditioner and then is sent into the target space;
b) Heating up an air conditioner:
the control system gradually reduces the flow rate of the refrigerant/chilled water of the air flow regulating device; the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is smaller than (usually 0.5-2 ℃ is selected and regulated according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner) the temperature of saturated humidity corresponding to the absolute humidity required by the air in the control target space; the air quantity flowing through the condenser of the condensing heat recovery device is adjusted through the proportional air valve of the condensing heat recovery device to realize the adjustment of heating quantity, the air is heated and adjusted to be slightly smaller than the air outlet temperature of the fan (usually 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system requires the air supply temperature, and finally the air outlet temperature of the air conditioner after the whole condensing heat recovery device meets the air supply temperature of the air conditioner and then is sent into a target space.
The humidification state control steps are as follows:
a) When the air outlet temperature of the coil is smaller than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is smaller than (usually 0.1-2 ℃ is selected and regulated according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner) the temperature of saturated humidity corresponding to the absolute humidity required by the air in the control target space; the air quantity is adjusted through a humidifier 8, the air quantity flowing through a condenser of the condensing heat recovery device 9 is adjusted through a proportional air valve, heating quantity is adjusted, air is heated and adjusted to be slightly smaller than the air outlet temperature of a fan (generally, 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of an air conditioner), the air outlet temperature of the air conditioner is adjusted through an auxiliary electric heater, and the air is fed into a target space after the air outlet temperature of the air conditioner meets the air supply temperature of the air conditioner;
b) When the air outlet temperature of the coil is greater than or equal to the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the air flow rate of the refrigerant/the refrigerating water is increased by adjusting the air flow adjusting device, so that the air outlet temperature flowing through the coil is always ensured to be smaller than (usually 0.1-2 ℃ is selected and adjusted according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner); the air quantity of the condenser is adjusted through a proportional air valve of the condensation heat recovery device 9 after being adjusted by the humidifier 8, heating quantity is adjusted, air is heated and adjusted to be slightly smaller than the air outlet temperature of the fan (usually 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system requires air supply temperature, and finally the air outlet temperature of the air conditioner after being adjusted by the auxiliary electric heater meets the air supply temperature of the air conditioner and then is fed into a target space.
Compared with the prior art, the invention has the beneficial effects that:
the invention utilizes the air conditioner heated by the condensation heat recovery device, uses the condensation heat of the air conditioner as a main heat source for heating the air conditioner, realizes 0-100% adjustment of recyclable heat, greatly reduces the auxiliary electric heating energy consumption and improves the energy utilization rate of the air conditioner; the condensing heat recovery device can realize rapid and continuous adjustment of heating quantity by rapidly adjusting the air quantity flowing through the condenser, and has high heating adjustment precision.
The air conditioner heated by the condensation heat recovery device is provided with the electric proportional integral regulating air valve or the variable frequency fan to continuously regulate the air quantity passing through the evaporator coil, so that the air conditioner is convenient to install, simple to control and low in manufacturing cost; the application range is wide, and the device can be widely applied to various high-precision constant temperature and humidity precision air conditioners.
Drawings
FIG. 1 is a schematic side view of an air conditioner precisely heated by a condensation heat recovery device with a proportional air valve;
FIG. 2 is a schematic side view of an air conditioner precisely heated by a condensing heat recovery device of a speed regulating fan;
fig. 3 is a schematic diagram of the air-cooling principle of an air conditioner heated by a condensation heat recovery device.
The main component symbols in the drawings illustrate:
in the figure:
1. compressor 2, air-cooled condenser/water fluorine heat exchanger
3. Liquid storage tank 4 and liquid mirror
5. Throttling device 6 and evaporator coil
7. Water collecting tray 8 and humidifier
9. Condensation heat recovery device 10 and auxiliary electric heater
12. Ventilating box
13. Blower 14, condensing fan
15. Air supply port 16 and return air port
17. Fresh air inlet 18 and fresh air guide plate
19. Room temperature and humidity sensor
20. Air-supply temperature and humidity sensor
41. Condensate drain
42. The humidifier supplies water.
Detailed Description
The invention is described in detail below with reference to the attached drawings and examples:
1-3, an air conditioner heated by a condensing heat recovery device, comprising: a ventilation box and a refrigerant circulation circuit; the refrigerant cycle circuit includes: a compressor 1, a condensation heat recovery device 9, an air-cooled condenser/water fluorine heat exchanger 2, a drying filter 3, a liquid mirror 4, a throttling device 5 and an evaporator coil 6; the compressor is arranged in the air feeding box or the condenser;
the ventilation box is provided with an air return opening 16 and an air supply opening 15;
an evaporator coil 6, a humidifier 8, a heater 9, an auxiliary electric heater 10 and a blower 13 are sequentially arranged in the ventilation box 12 from a return air inlet 16 to a blower air inlet 15;
the air return opening 16 and the air supply opening 15 are respectively communicated with the target space;
the water collecting disc 7 is positioned at the lower part of the evaporator coil 6;
a condensation heat recovery device 9 is arranged in the ventilation box;
the air return opening 16 is communicated with the air supply opening 15 through the condensation heat recovery device 9;
the condensation heat recovery apparatus (9) includes an internal condenser 91 and an airflow adjusting apparatus;
the refrigerant inlet and outlet pipes of the internal condenser 91 are respectively connected with the compressor 1 and the air-cooled condenser/water fluorine heat exchanger 2;
the internal condenser is connected with the airflow adjusting device.
The air flow regulating device is a proportional air valve 92.
The air flow adjusting device is a speed adjusting fan 93.
The evaporator coil is connected with an external water chilling unit to form a refrigerant circulation loop.
The condensing heat recovery device adjusts an air valve or a variable frequency fan through electric proportional integral, and realizes continuous adjustment of the air quantity passing through the condenser through adjustment of analog quantity of the air valve and the fan.
The condensing heat recovery device controls the air quantity passing through the coil pipe air quantity of the condenser by adjusting the opening degree of the air valve or the rotating speed of the fan, and adjusts the heating quantity.
When the air conditioning system has no heating requirement, the proportional air valve is closed, and the circulating air flow of the air conditioner does not flow through the internal condenser of the condensation heat recovery device;
when the air conditioning system has a heating requirement, the condensing heat recovery device realizes continuous adjustment of the air quantity passing through the condenser 91 through the adjustment of the analog quantity of the comparative air valve 92, and further realizes continuous adjustment of the heating quantity.
An air conditioner heated by a condensation heat recovery apparatus, comprising: a ventilation box and a refrigerant circulation circuit;
the ventilation box is provided with an air return opening 16 and an air supply opening 15;
an evaporator coil 6, a humidifier 8, a heater 9, an auxiliary electric heater 10 and a blower 13 are sequentially arranged in the ventilation box 12 from a return air inlet 16 to a blower air inlet 15;
the air return opening 16 and the air supply opening 15 are respectively communicated with the target space;
the water collecting disc 7 is positioned at the lower part of the evaporator coil 6;
the ventilation box 12 includes: mixing primary zone 31, surface cooling zone 32, heating zone 33, humidification zone 34, fan zone 35, and auxiliary heating zone 36;
the heating area is provided with a heater;
the heating area comprises a proportional air valve and a condenser;
the proportional air valve is tightly connected with the condenser;
the refrigerant inlet and outlet pipes of the internal condenser are respectively connected with the compressor and the outdoor condenser;
the humidifying area is provided with a humidifier;
the fan area is provided with a fan;
the auxiliary heating area is provided with an auxiliary heater;
the heating area comprises a proportional air valve and an internal condenser;
the proportional air valve is tightly connected with the condenser;
the refrigerant inlet and outlet pipes of the condenser are respectively connected with the compressor and the outdoor condenser.
The air conditioner heated by the condensation heat recovery device is suitable for high-precision air-cooled constant temperature and humidity air conditioners.
The air passes through the condensation heat recovery device, the air quantity flowing through the condenser of the condensation heat recovery device is adjusted by the proportional air valve to realize continuous adjustment of heating quantity (0-100% of recyclable heat), and after the air supply temperature of the fan required by the system is reached, the air outlet temperature of the air conditioner is adjusted by the auxiliary electric heater to meet the air supply temperature of the air conditioner and then the air is sent into a target space.
The proportional air valve of the condensation heat recovery device 9 adjusts the air quantity flowing through the condenser to realize the adjustment of heating quantity, and an external condenser tube controlled by an stepless speed regulating fan is adopted to maintain the normal range of condensation pressure;
when the pressure of the outdoor condensing system is higher than the stall pressure of the set running condensing pressure fan by +60kpa, the heating quantity of the internal condensing heat recovery device is reduced by gradually reducing the air quantity flowing through the internal condenser; the heating quantity of the internal condensation heat recovery device is increased by gradually increasing the air quantity flowing through the internal condenser;
when the pressure of the outdoor condensing system is reduced to be less than or equal to the set running condensing pressure fan stall pressure +60kpa, (20-150 kpa is set according to the control precision of the air conditioner, the higher the control precision is, the larger the set value is), the air quantity flowing through the internal condenser is stopped to be increased so as to be used as the maximum heating quantity of the condensing heat recovery device;
when the condensing pressure is reduced to be less than or equal to the set running condensing pressure fan stall pressure +20kpa, the air quantity flowing through the internal condenser is gradually reduced, so that the heating quantity of the condensing heat recovery device is reduced, the pressure of the outdoor condensing system is kept to be more than or equal to the running condensing pressure fan stall pressure +60deg.kpa, and good running of the refrigerating system is ensured.
The refrigeration control steps are as follows:
a) Cooling by an air conditioner: the control system increases the flow of the throttling device refrigerant/chilled water stepwise; the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is lower than the saturation humidity temperature corresponding to the absolute humidity content required by the air of the control target space (usually 0.1-0.5 ℃ and set according to the humidity control precision requirement of the air conditioner) and the cold air ratio configuration;
the air quantity flowing through the internal condenser is adjusted through a proportional air valve of the condensation heat recovery device 9 after being adjusted by the humidifier 8, so that heating quantity is adjusted, the air heating is adjusted to be slightly less than the air outlet temperature of the fan (generally, 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system requires the air supply temperature, and finally, the air outlet temperature of the air conditioner is adjusted by the auxiliary electric heater 10 to meet the air supply temperature of the air conditioner and then is sent into a target space;
b) Heating up an air conditioner:
the control system reduces the flow of refrigerant/chilled water by adjusting the air flow adjustment device; the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is smaller than (usually 0.1-0.5 ℃ is selected and set according to the humidity control precision requirement of the air conditioner and the cold air ratio configuration) the temperature of saturated humidity corresponding to the absolute humidity required by the air in the control target space;
the air quantity flowing through the condenser of the condensing heat recovery device 9 is adjusted through the proportional air valve of the condensing heat recovery device 8 to realize the adjustment of heating quantity, the air heating is adjusted to be slightly smaller than the air outlet temperature of the fan (usually 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system requires the air supply temperature, and finally the air outlet temperature of the air conditioner is adjusted through the auxiliary electric heater 10 to meet the air supply temperature of the air conditioner and then is sent into a target space.
The dehumidification control steps are as follows:
a) Cooling by an air conditioner:
the control system increases the flow rate of the refrigerant/chilled water by adjusting the air flow adjusting device; the air supply fan of the air conditioner keeps constant output;
the temperature of the air outlet flowing through the coil is always guaranteed to be lower than (usually 0.5-2 ℃ is selected and adjusted according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner, meanwhile, the temperature of the coil is kept higher than 0 ℃ and the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the target space is controlled, the air is regulated by the humidifier 8, the air quantity flowing through the condenser of the air conditioner is regulated by the proportional air valve of the condensation heat recovery device 9 to realize the regulation of heating quantity, the air heating is regulated to be slightly lower than the air outlet temperature of the fan (usually 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system is required to supply air temperature, and finally, the air outlet temperature of the air conditioner is regulated by the auxiliary electric heater 10 to meet the air supply temperature of the air conditioner and then is fed into the target space;
b) Heating up an air conditioner:
the control system gradually reduces the flow rate of the refrigerant/chilled water of the air flow regulating device; the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is smaller than (usually 0.5-2 ℃ is selected and regulated according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner) the temperature of saturated humidity corresponding to the absolute humidity required by the air in the control target space; the air quantity of the condenser is adjusted through a proportional air valve of a condensation heat recovery device 9 after the adjustment of the humidifier 8, heating quantity is adjusted, the air is heated and adjusted to be slightly smaller than the air outlet temperature of a fan (usually 0.01-0.5 ℃ in a selected mode and set according to the humidity control precision requirement and the cold air ratio configuration of an air conditioner), the air outlet temperature of the air conditioner is adjusted through an auxiliary electric heater 10 to meet the air outlet temperature of the air conditioner, and the air is fed into a target space.
The humidification state control steps are as follows:
a) When the air outlet temperature of the coil is smaller than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the air supply fan of the air conditioner keeps constant output;
always ensuring that the air outlet temperature flowing through the coil is smaller than (usually 0.1-2 ℃ is selected and regulated according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner) the temperature of saturated humidity corresponding to the absolute humidity required by the air in the control target space; the air quantity is adjusted through a humidifier 8, the air quantity flowing through a condenser of the condensation heat recovery device 9 is adjusted through a proportional air valve, heating quantity is adjusted, air is heated and adjusted to be slightly smaller than the air outlet temperature of a fan (generally, 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of an air conditioner), the air outlet temperature of the air conditioner is adjusted through an auxiliary electric heater 10, and the air is fed into a target space after the air outlet temperature of the air conditioner meets the air supply temperature of the air conditioner;
b) When the air outlet temperature of the pipe is larger than or equal to the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the air flow rate of the refrigerant/the refrigerating water is increased by adjusting the air flow adjusting device, so that the air outlet temperature flowing through the coil pipe is always ensured to be smaller than (usually 0.1-2 ℃ is selected and adjusted according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner); the air quantity of the condenser is adjusted through a proportional air valve of the condensation heat recovery device 9 after being adjusted by the humidifier 8, heating quantity is adjusted, air is heated and adjusted to be slightly smaller than the air outlet temperature of the fan (usually 0.01-0.5 ℃ is selected and set according to the humidity control precision requirement and the cold air ratio configuration of the air conditioner), the air conditioning system requires air supply temperature, and finally the air outlet temperature of the air conditioner after being adjusted by the auxiliary electric heater meets the air supply temperature of the air conditioner and then is fed into a target space.
The air conditioning control system is managed by an air refrigerating, humidifying and condensing heat recovery device, an auxiliary electric heating device, an air supply device and other devices, and the temperature and humidity control of a control target space is realized by collecting sensors such as pressure, temperature and humidity of air flow of the air conditioning system and pressure of the refrigerating system.
The invention uses the air conditioner heated by the condensation heat recovery device, uses the condensation heat as a heat source, almost consumes no energy consumption of the air conditioner, and adjusts the heating quantity by quickly adjusting the air quantity flowing through the condensation heat recovery device, thereby having high control precision. The invention can realize the high-precision control of the air conditioner and the operation of electric energy consumption.
The air conditioner heated by the condensation heat recovery device is provided with the electric proportional integral regulating air valve or the variable frequency fan to continuously regulate the air quantity passing through the condensation heat recovery device, so that the air conditioner is convenient to install, simple to control and low in manufacturing cost; the application range is wide, and the device can be widely applied to various high-precision constant temperature and humidity precision air conditioners.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the technical scope of the present invention.

Claims (10)

1. An air conditioner heated by a condensation heat recovery apparatus, comprising: a ventilation box and a refrigerant circulation circuit; the refrigerant cycle circuit includes: the device comprises a compressor (1), an air-cooled condenser/water fluorine heat exchanger (2), a drying filter (3), a liquid mirror (4), a throttling device (5) and an evaporator coil (6); the compressor is arranged in the air feeding box or the condenser;
the ventilation box is provided with an air return opening (16) and an air supply opening (15);
an evaporator coil pipe (6), a humidifier (8), a condensation heat recovery device (9), an auxiliary electric heater (10) and a blower (13) are sequentially arranged in the ventilation box (12) from the return air inlet (16) to the air inlet (15);
the air return opening (16) and the air supply opening (15) are respectively communicated with the target space;
the water collecting disc (7) is positioned at the lower part of the evaporator coil (6);
it is characterized in that a condensation heat recovery device (9) is arranged in the ventilation box;
the condensation heat recovery device (9) is positioned between the evaporator coil (6) and the air supply outlet (15);
the condensation heat recovery device (9) comprises an internal condenser (91) and an air flow regulating device;
the refrigerant inlet and outlet pipes of the internal condenser (91) are respectively connected with the compressor (1) and the air-cooled condenser/water fluorine heat exchanger (2);
the internal condenser is connected with the airflow adjusting device.
2. An air conditioner heated by a condensation heat recovery apparatus according to claim 1, wherein: the air flow regulating device is a proportional air valve (92).
3. An air conditioner heated by a condensation heat recovery apparatus according to claim 1, wherein: the air flow regulating device is a speed regulating fan (93).
4. A control method of an air conditioner heated by a condensation heat recovery apparatus according to claim 3, wherein: when the air conditioning system has no heating requirement, the proportional air valve is closed, and the circulating air flow of the air conditioner does not flow through the internal condenser of the condensation heat recovery device;
when the air conditioning system has a heating requirement, the condensing heat recovery device realizes continuous adjustment of the air quantity passing through the condenser (91) through the adjustment of the analog quantity of the comparative air valve (92), and further realizes continuous adjustment of the heating quantity.
5. An air conditioner heated by a condensation heat recovery apparatus, comprising: a ventilation box and a refrigerant circulation circuit;
the ventilation box is provided with an air return opening (16) and an air supply opening (15);
an evaporator coil pipe (6), a humidifier (8), a heater (9), an auxiliary electric heater (10) and a blower (13) are sequentially arranged in the ventilation box (12) from the return air inlet (16) to the air inlet (15);
the air return opening (16) and the air supply opening (15) are respectively communicated with the target space;
the water collecting disc (7) is positioned at the lower part of the evaporator coil (6);
the ventilation box (12) comprises: mixing the primary area, the surface cooling area, the heating area, the humidifying area, the fan area and the auxiliary heating area;
the heating area is provided with a heater;
the humidifying area is provided with a humidifier;
the fan area is provided with a fan;
the auxiliary heating area is provided with auxiliary heater, its characterized in that:
the heating area comprises a proportional air valve and an internal condenser;
the proportional air valve is tightly connected with the condenser;
the refrigerant inlet and outlet pipes of the condenser are respectively connected with the compressor and the outdoor condenser.
6. The control method of an air conditioner heated by a condensing heat recovery device according to claim 5, wherein:
the air passes through the condensation heat recovery device, the air quantity flowing through the condenser of the condensation heat recovery device is adjusted by the proportional air valve to realize continuous adjustment of heating quantity, and after the air quantity reaches the air supply temperature of a fan required by a system, the air outlet temperature of the air conditioner is adjusted by the auxiliary electric heater to meet the air supply temperature of the air conditioner and then is sent into a target space;
the proportional air valve of the condensing heat recovery device adjusts the air quantity flowing through the condenser to realize the adjustment of heating quantity, and an external condenser tube device controlled by an stepless speed regulating fan is adopted to maintain the normal range of condensing pressure;
when the pressure of the outdoor condensing system is higher than the stall pressure of the set running condensing pressure fan by +60kpa, the heating quantity of the internal condensing heat recovery device is reduced by gradually reducing the air quantity flowing through the internal condenser; the heating quantity of the internal condensation heat recovery device is increased by gradually increasing the air quantity flowing through the internal condenser;
when the pressure of the outdoor condensing system is reduced to be less than or equal to the set running condensing pressure fan stall pressure +60kpa, stopping increasing the air quantity flowing through the internal condenser so as to be used as the maximum heating quantity of the condensing heat recovery device;
when the condensing pressure is reduced to be less than or equal to the set running condensing pressure fan stall pressure +20kpa, the air quantity flowing through the internal condenser is gradually reduced, so that the heating quantity of the condensing heat recovery device is reduced, the pressure of the outdoor condensing system is kept to be more than or equal to the running condensing pressure fan stall pressure +60deg.kpa, and good running of the refrigerating system is ensured.
7. The control method of an air conditioner heated by a condensing heat recovery device according to claim 5, wherein:
the refrigeration control steps are as follows:
a) Cooling by an air conditioner: the control system increases the flow of the throttling device refrigerant/chilled water stepwise; the air supply fan of the air conditioner keeps constant output;
always ensuring that the temperature of the air outlet flowing through the coil is lower than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
the air quantity flowing through the internal condenser is adjusted through a proportional air valve of the condensation heat recovery device after being adjusted by the humidifier, so that heating quantity is adjusted, air is heated and adjusted to be lower than air supply temperature required by an air conditioning system, and finally the air outlet temperature of the air conditioner after being adjusted by the auxiliary electric heater meets air supply temperature of the air conditioner and is fed into a target space;
b) Heating up an air conditioner:
the control system reduces the flow of refrigerant/chilled water by adjusting the air flow adjustment device; the air supply fan of the air conditioner keeps constant output;
always ensuring that the temperature of the air outlet flowing through the coil is smaller than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
through adjusting the humidifier, the air quantity flowing through the condenser of the condensation heat recovery device is adjusted through the proportional air valve, heating quantity is adjusted, air is heated and adjusted to be smaller than the air supply temperature required by an air conditioning system, and finally the air outlet temperature of the air conditioner is adjusted through the auxiliary electric heater to meet the air supply temperature of the air conditioner and then is fed into a target space.
8. The control method of an air conditioner heated by a condensing heat recovery device according to claim 5, wherein:
the dehumidification control steps are as follows:
a) Cooling by an air conditioner:
the control system increases the flow rate of refrigerant/chilled water through the coil; the air supply fan of the air conditioner keeps constant output;
the temperature of the air outlet flowing through the coil pipe is always ensured to be lower than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the air is regulated by the humidifier, the air quantity flowing through the condenser of the air conditioner is regulated by the proportional air valve of the condensation heat recovery device to realize the regulation of heating quantity, the air is heated and regulated to be lower than the air supply temperature required by the air conditioning system, and finally the air outlet temperature of the air conditioner is regulated by the auxiliary electric heater 10 to meet the air supply temperature of the air conditioner and then is fed into the target space;
b) Heating up an air conditioner:
the control system gradually reduces the flow rate of the refrigerant/chilled water of the air flow regulating device; the air supply fan of the air conditioner keeps constant output;
always ensuring that the temperature of the air outlet flowing through the coil is smaller than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space; the air quantity flowing through the condenser of the condensing heat recovery device is adjusted through the proportional air valve of the condensing heat recovery device after being adjusted by the humidifier, heating quantity is adjusted, air is heated and adjusted to be slightly smaller than the air supply temperature required by an air conditioning system, and finally the air outlet temperature of the air conditioner after being adjusted by the auxiliary electric heater 10 meets the air supply temperature of the air conditioner and then is fed into a target space.
9. The control method of an air conditioner heated by a condensing heat recovery device according to claim 5, wherein:
the humidification state control steps are as follows:
a) When the air outlet temperature of the coil is smaller than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space, increasing the air quantity of the air conditioner blower;
always ensuring that the temperature of the air outlet flowing through the coil pipe is equal to the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space; the air quantity of the air flowing through the condenser is adjusted through a proportional air valve of the condensation heat recovery device to realize heating quantity adjustment, the air is heated and adjusted to be smaller than the air supply temperature required by an air conditioning system, and finally the air outlet temperature of the air conditioner is adjusted through an auxiliary electric heater to meet the air supply temperature of the air conditioner and then is fed into a target space;
b) When the air outlet temperature of the coil is higher than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the air outlet temperature flowing through the coil is always ensured to be equal to the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space; the air quantity of the condenser is adjusted through the proportional air valve of the condensation heat recovery device to realize heating quantity adjustment, the air is heated and adjusted to be smaller than the air supply temperature required by an air conditioning system, and finally the air outlet temperature of the air conditioner is adjusted through the auxiliary electric heater to meet the air supply temperature of the air conditioner and then is fed into a target space.
10. The control method of an air conditioner heated by a condensing heat recovery device according to claim 5, wherein:
the dehumidification state control steps are as follows:
always ensuring that the temperature of the air outlet flowing through the coil is smaller than the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space; the air quantity of the condenser is adjusted through the proportional air valve of the condensation heat recovery device to realize heating quantity adjustment, the air is heated and adjusted to be smaller than the air supply temperature required by an air conditioning system, and finally the air outlet temperature of the air conditioner is adjusted through the auxiliary electric heater to meet the air supply temperature of the air conditioner and then is fed into a target space.
CN202310189808.8A 2023-03-02 2023-03-02 Air conditioner heated by condensation heat recovery device and control method Pending CN116255694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310189808.8A CN116255694A (en) 2023-03-02 2023-03-02 Air conditioner heated by condensation heat recovery device and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310189808.8A CN116255694A (en) 2023-03-02 2023-03-02 Air conditioner heated by condensation heat recovery device and control method

Publications (1)

Publication Number Publication Date
CN116255694A true CN116255694A (en) 2023-06-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310189808.8A Pending CN116255694A (en) 2023-03-02 2023-03-02 Air conditioner heated by condensation heat recovery device and control method

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Country Link
CN (1) CN116255694A (en)

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