CN107101286B - Evaporative cooling and dehumidifying air conditioning unit and control method thereof - Google Patents
Evaporative cooling and dehumidifying air conditioning unit and control method thereof Download PDFInfo
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- CN107101286B CN107101286B CN201710403207.7A CN201710403207A CN107101286B CN 107101286 B CN107101286 B CN 107101286B CN 201710403207 A CN201710403207 A CN 201710403207A CN 107101286 B CN107101286 B CN 107101286B
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses an evaporative cooling dehumidification air conditioning unit and a control method thereof, wherein the air conditioning unit comprises a shell, a compressor, a condenser, a liquid storage tank, a throttling device and an evaporator which are arranged in the shell and are sequentially and circularly connected, and the air conditioning unit also comprises an evaporative condenser, a fan wall and a controller, wherein the evaporative condenser is connected between the compressor and the condenser in series; the water pump is arranged below the evaporative condenser, and the axial flow fan is arranged above the evaporative condenser; the condenser comprises a first tube fin condenser and a second tube fin condenser which are arranged in parallel; the two tube fin condensers are respectively arranged in the shell in a horizontally rotatable manner through a rotating device. The evaporative cooling dehumidification air conditioning unit provided by the invention has higher dehumidification capacity, can accurately adjust the temperature of the dehumidified air, and can rotate the tube-fin condenser to be parallel to the length direction of the shell when temperature adjustment is not needed.
Description
Technical Field
The invention relates to the field of air conditioning equipment, in particular to an evaporative cooling dehumidification air conditioning unit and a control method thereof.
Background
The traditional dehumidifier generally adopts air cooling or water cooling, so that the condensation temperature and the evaporation temperature of the system are limited, and the dehumidification capacity is general; meanwhile, a reheating temperature-adjusting heat exchanger adopted by the traditional dehumidifier is fixed, so that the air temperature cannot be accurately adjusted when the air after dehumidification is reheated and adjusted in temperature; because the reheating temperature-adjusting heat exchanger is fixed in the air circulation pipeline, air also passes through the reheating temperature-adjusting heat exchanger when reheating temperature adjustment is not needed, so that larger resistance is generated, namely, unnecessary load of a blower is increased, and the energy consumption of the whole dehumidifier is increased.
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 evaporative cooling dehumidification air conditioning unit and a control method thereof, and aims to solve the technical problems that the dehumidification capacity of the existing dehumidifier is not high, and when the dehumidified air does not need reheating temperature adjustment, the air also passes through a reheating temperature adjustment heat exchanger to generate large resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
an evaporative cooling and dehumidifying air conditioning unit comprises a shell, a compressor, a condenser, a liquid storage tank, a throttling device and an evaporator, wherein the compressor, the condenser, the liquid storage tank, the throttling device and the evaporator are arranged in the shell and are sequentially connected in a circulating manner; the water pump is arranged below the evaporative condenser, and the axial flow fan is arranged above the evaporative condenser; the condenser comprises a first tube fin condenser and a second tube fin condenser which are arranged in parallel; the two tube-fin condensers are respectively arranged in the shell in a horizontally rotatable manner through a rotating device; the evaporative condenser, the evaporator, the throttling device, the tube-fin condenser and the fan wall are sequentially arranged along the length direction of the shell; an air inlet and a corresponding air inlet electric air valve are arranged at the side surface of the shell corresponding to the position between the evaporative condenser and the evaporator, and an air supply outlet and a corresponding air supply electric air valve are arranged at one end of the shell adjacent to the fan wall; the compressor, the throttling device, the two rotating devices, the water pump, the axial flow fan, the air inlet electric air valve and the air supply electric air valve are respectively and electrically connected with the controller; the temperature of the dehumidified air is accurately adjusted by rotating the two tube-fin condensers so as to adjust the contact area of the tube-fin condensers and the air flow; when the temperature of the dehumidified air does not need to be adjusted, the two tube-fin condensers can be rotated to the position parallel to the airflow direction.
In the evaporative cooling dehumidification air conditioning unit, each rotating device comprises a motor which is vertically installed downwards, a driving belt pulley which is sleeved on a main shaft of the motor, a bearing seat which is arranged on a bottom plate of the shell, a rotating shaft which is rotatably connected with the bearing seat through a bearing, and a driven belt pulley which is sleeved on the rotating shaft; the driving belt pulley is connected with the driven belt pulley through a triangular belt; one end of the rotating shaft, which is opposite to the bearing block, is fixedly connected with the bottom of the tube-fin condenser; and the motors of the two rotating devices are respectively and electrically connected with the controller.
In the evaporative cooling dehumidification air conditioning unit, the throttling device comprises a first throttling device and a second throttling device which are arranged in parallel, and the evaporator comprises a first evaporator and a second evaporator which are arranged in parallel; an outlet of the first throttling device is connected with an inlet of the first evaporator, and an outlet of the second throttling device is connected with an inlet of the second evaporator; a first electromagnetic valve is arranged on the first evaporator inlet pipeline, and a second electromagnetic valve is arranged on the second evaporator inlet pipeline; the first electromagnetic valve and the second electromagnetic valve are respectively electrically connected with the controller.
In the evaporative cooling dehumidification air conditioning unit, the first throttling device and the second throttling device are electronic expansion valves for self-adaptively adjusting the superheat degree of the evaporator.
The evaporative cooling dehumidification air conditioning unit also comprises a first temperature sensor and a first humidity sensor which are arranged at the air inlet, a second temperature sensor and a second humidity sensor which are arranged at the first evaporator, a third temperature sensor and a third humidity sensor which are arranged at the second evaporator, and a fourth temperature sensor and a fourth humidity sensor which are arranged at the air supply opening; the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the first humidity sensor, the second humidity sensor, the third humidity sensor and the fourth humidity sensor are respectively electrically connected with the controller.
In the evaporative cooling dehumidification air conditioning unit, a primary filter and a middle filter are sequentially arranged between the air inlet and the evaporator.
The invention also correspondingly provides a control method of the evaporative cooling dehumidification air conditioning unit, which comprises the following steps:
s100, presetting the moisture content D0 and the dry bulb temperature T0 of air in the controller;
s200, the controller receives a starting instruction, and respectively controls an air inlet electric air valve and an air supply electric air valve to be opened, and respectively controls the compressor, the fan wall, the water pump and the axial flow fan to be started; controlling the motors of the two rotating devices to rotate and driving each tube fin type condenser to form an included angle of 60 degrees with the length direction of the shell, and then executing the step S300;
s300, the controller receives an operation mode selected by a user; when the selected operation mode is the dehumidification cooling mode, executing step S410; when the selected operation mode is the dehumidification mode, performing step S420; when the selected operation mode is the ventilation mode, performing step S430;
s410, the controller conducts dehumidification regulation by controlling the opening and closing states of the first electromagnetic valve and the second electromagnetic valve; the controller drives the tube fin type condenser to rotate by controlling the motors of the two rotating devices to rotate so as to regulate the temperature;
s420, the controller conducts dehumidification regulation by controlling the opening and closing states of the first electromagnetic valve and the second electromagnetic valve; the controller respectively controls the motors of the two rotating devices to rotate until the two tube-fin condensers are parallel to the length direction of the shell;
and S430, the controller controls the compressor to stop running, and respectively controls the motors of the two rotating devices to rotate until the two tube fin condensers are parallel to the length direction of the shell.
In the control method of the evaporative cooling dehumidification air conditioning unit, the step S410 specifically includes:
the first humidity sensor feeds back the detected actual moisture content D1 at the air inlet to the controller, the second humidity sensor feeds back the detected actual moisture content D2 at the first tube-fin condenser to the controller, and the third humidity sensor feeds back the detected actual moisture content D3 at the second tube-fin condenser to the controller; the fourth humidity sensor feeds back the detected actual moisture content D4 at the air supply opening to the controller; the first temperature sensor feeds back the detected actual dry bulb temperature T1 at the air inlet to the controller, the second temperature sensor feeds back the detected actual dry bulb temperature T2 at the first tube-fin condenser to the controller, and the third temperature sensor feeds back the detected actual dry bulb temperature T3 at the second tube-fin condenser to the controller; the fourth humidity sensor feeds back the detected actual dry bulb temperature T4 at the air supply opening to the controller; the controller compares the received moisture contents D1, D2, D3 and D4 with a preset moisture content D0, and controls the first electromagnetic valve and the second electromagnetic valve to be opened if D1 is not less than (D0+10) g/kg; if D2 ═ g/kg (D0+ -0.1), the second electromagnetic valve is controlled to be closed, if D1 < (D0+10) g/kg, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be closed, and when D4 ═ D3 ═ g/kg (D0+ -0.1), the working state of the compressor is kept unchanged; the controller compares the received actual temperatures T1, T2, T3 and T4 with a preset dry bulb temperature T0, if (T3+10) is more than or equal to T0, the controller respectively controls the two rotating devices to rotate so that the included angle between each tube-fin condenser and the length direction of the shell is reduced, if (T3+10) < T0, the controller respectively controls the motors of the two rotating devices to rotate so that the included angle between each tube-fin condenser and the length direction of the shell is increased, and when T4 is (T0 +/-0.5), each rotating device is kept not to rotate; when T4 ≦ T0 and D4 ≦ D0, then step S430 is performed.
In the control method of the evaporative cooling dehumidification air conditioning unit, the step S420 specifically includes:
the controller controls the motors of the two rotating devices to rotate so that the two finned condensers are parallel to the length direction of the shell; the first humidity sensor feeds back the detected actual moisture content D1 at the air inlet to the controller, the second humidity sensor feeds back the detected actual moisture content D2 at the first tube-fin condenser to the controller, and the third humidity sensor feeds back the detected actual moisture content D3 at the second tube-fin condenser to the controller; the fourth humidity sensor feeds back the detected actual moisture content D4 at the air supply opening to the controller; the controller compares the received moisture contents D, D2, D3 and D4 with a preset moisture content D0, and controls the first electromagnetic valve and the second electromagnetic valve to be opened if D1 is not less than (D0+10) g/kg; if D2 ═ g/kg (D0 +/-0.1), the second electromagnetic valve is controlled to be closed, if D1 < (D0+10) g/kg, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be closed, and when D4 ═ D3 ═ g/kg (D0 +/-0.1), the working state of the compressor is kept unchanged; when T4 ≦ T0, and D4 ≦ D0, then step S430 is performed.
In the control method of the evaporative cooling and dehumidification air conditioning unit, the step S430 further includes: when the temperature and the moisture content of the air dry bulb at the air supply port cannot simultaneously satisfy T4 ≤ T0 and D4 ≤ D0, the compressor is started, and the step S420 is executed.
Has the advantages that:
the invention provides an evaporative cooling dehumidification air conditioning unit and a control method thereof, wherein the evaporative cooling dehumidification air conditioning unit condenses a refrigerant by adopting an evaporative condenser, so that the temperature of a condenser and the evaporation temperature of a refrigeration system are reduced, and the dehumidification effect of the air conditioning unit is improved; the two tube fin condensers are rotatably arranged in the shell, and the contact area between the tube fin condensers and air flow can be adjusted by rotating the two tube fin condensers so as to accurately adjust the temperature of the dehumidified air; when the temperature of the dehumidified air does not need to be adjusted, the two tube fin condensers can be rotated to be parallel to the length direction of the shell so as to reduce the resistance of the tube fin condensers to air flow, and therefore the purpose of energy conservation is achieved. The control method realizes that the air conditioning unit can operate in a dehumidification temperature regulation mode, a dehumidification mode and a ventilation mode, improves the applicability of the air conditioning unit and achieves the purpose of energy conservation.
Drawings
Fig. 1 is a front view of an evaporative cooling dehumidification air conditioning unit provided by the present invention.
Fig. 2 is a top view of an evaporative cooling dehumidification air conditioning unit provided by the invention.
Fig. 3 is a left side view of the evaporative cooling dehumidification air conditioning unit provided by the invention.
Fig. 4 is a working schematic diagram of the evaporative cooling dehumidification air conditioning unit provided by the invention.
Fig. 5 is a schematic view of a rotary device in the evaporative cooling dehumidification air conditioning unit provided by the invention.
Fig. 6 is a flow chart of a control method of an evaporative cooling dehumidification air conditioning unit provided by the invention.
Detailed Description
The invention provides an evaporative cooling dehumidification air conditioning unit 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 below by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1-4, an evaporative cooling dehumidification air conditioning unit is provided.
The evaporative cooling dehumidification air conditioning unit comprises a substantially cuboid shell 90, a compressor 110, a condenser 140, a liquid storage tank 150, a throttling device 160 and an evaporator 170 which are arranged in the shell and are sequentially and circularly connected, and the evaporative cooling unit further comprises an evaporative condenser 130, a fan wall 230 and a controller (not shown in the figure), wherein the evaporative condenser 130 is connected between the compressor and the condenser in series, and is used for supplying air; the system also comprises a water pump 310 arranged below the evaporative condenser and an axial flow fan 320 arranged above the evaporative condenser (2 axial flow fans are shown in the figures 1 and 2); the condenser 140 comprises a first tube-fin condenser 141 and a second tube-fin condenser 142 which are arranged in parallel; the two tube fin condensers are respectively arranged in the shell in a horizontally rotatable manner through a rotating device (the structure of the rotating device will be described in detail later); the evaporative condenser, the evaporator, the throttling device, the tube-fin condenser and the fan wall are sequentially arranged along the length direction of the shell; an air inlet 901 and a corresponding air inlet electric air valve (not shown in the figure) are arranged on the side surface of the shell corresponding to the position between the evaporative condenser and the evaporator, and an air supply outlet 902 and a corresponding air supply electric air valve (not shown in the figure) are arranged at one end of the shell adjacent to the fan wall; the compressor, the throttling device, the two rotating devices, the water pump, the axial flow fan, the air inlet electric air valve and the air supply electric air valve are respectively electrically connected with the controller. In practical application, a primary filter 210 and a middle filter 220 are sequentially arranged between the air inlet and the evaporator; a silencer is arranged between the fan wall and the air supply outlet; an oil separator 120 is also provided between the compressor and the evaporative condenser.
When the air conditioning unit normally operates, a refrigerant is compressed by a compressor and then enters an oil separator for oil-gas separation, and then enters an evaporative condenser and two tube fin condensers for condensation; the condensed refrigerant enters a liquid storage tank for buffering, then enters a throttling device, is evaporated by an evaporator and finally returns to a compressor to form the circulation of the refrigerant. The evaporative condenser is a main condenser, and the working principle of the evaporative condenser is briefly described as follows: when the water-cooled evaporator works, cooling water is conveyed to the upper part of the evaporative condenser by the water pump and is uniformly sprayed on the surface of the evaporative condenser through the water distribution device (not shown in the figure) to form a thin water film, high-temperature vapor refrigerant enters the evaporative condenser to release heat and is condensed, a part of water absorbing heat is evaporated into water vapor, and the rest of the water falls into a lower water collecting tray (not shown in the figure), so that the water pump is used circularly; under the action of the axial flow fan, air sweeps across the surface of the evaporative condenser at a certain speed to promote water film evaporation, evaporated water vapor is discharged by the fan along with the air, and water drops which are not evaporated are blocked by the dehydrator and fall back to the water tray. The arrows in fig. 3 show the direction of air flow generated by the action of axial fan 320.
The following brief description is about the working principle of air dehumidification and temperature adjustment: after the electronic blast gate of air inlet and the electronic blast gate of air supply opened, under the effect of fan wall, the air got into the casing from the air intake, formed clean air through primary filter and secondary filter in proper order, when through the evaporimeter, the refrigerant heat absorption was evaporated, thereby the air is then exothermic to make aqueous vapor carried in the air realize the dehumidification by the condensation, and the air after the dehumidification passes through the fan wall again, is discharged from the supply-air outlet after the silencer noise elimination at last. The fan wall is an air supply device formed by arranging a plurality of fans in parallel, and the air quantity can be conveniently adjusted by setting the number of the started fans and the revolution of the fans; only one fan is schematically shown in fig. 4.
Therefore, the water film is used for assisting in air cooling, latent heat is taken away through water film evaporation to form water vapor, the condensation temperature of the refrigerating system is lowered, the liquid refrigerant can absorb more heat to complete evaporation, accordingly, the dehumidified air emits more heat, and the dehumidifying efficiency is higher. The dehumidification capability of the air conditioning unit is stronger, and the whole air conditioning unit can operate more energy-saving.
In addition, because the two tube fin condensers are respectively arranged in the shell through the rotating device, the included angle between each tube fin condenser and the length direction of the shell (namely the air flowing direction after dehumidification in the shell when the air conditioning unit operates) is adjustable, namely the contact area between each tube fin condenser and air flow is adjustable, the included angle between each tube fin condenser and the length direction of the shell when the tube fin condensers rotate ranges from 0 degree to 90 degrees, namely the tube fin condensers are parallel to the length direction of the shell when the tube fin condensers rotate at 0 degree, and the resistance of the tube fin condensers to air is minimum; and when the temperature is 90 degrees, the tube fin condenser is vertical to the length direction of the shell, and the contact area of the tube fin condenser and the airflow is the largest. Therefore, the temperature of the dehumidified air is accurately adjusted by rotating each shell-and-tube condenser. Furthermore, when the dehumidified air does not need to be subjected to temperature adjustment, each tube fin condenser is rotated to a position parallel to the airflow direction (namely, a position of a dotted line corresponding to two tube fin condensers in fig. 2), so that the resistance to the airflow is reduced to the maximum extent, and the energy consumption is reduced.
Referring to fig. 5, further, each of the rotating devices includes a motor 81 mounted vertically downward, a driving pulley 841 sleeved on a main shaft of the motor, a bearing seat 83 disposed on a bottom plate of the housing, a rotating shaft 82 rotatably connected with the bearing seat through a bearing, and a driven pulley 842 sleeved on the rotating shaft; the driving pulley and the driven pulley are connected through a V-belt 85 (only one V-belt is schematically shown in the figure); one end of the rotating shaft opposite to the bearing seat is fixedly connected with the bottom of the tube- fin condenser 141 or 142; the motors of the two rotating devices are respectively electrically connected with the controller; the motors are respectively mounted on a motor mounting bracket 811, and the motor mounting bracket 811 is fixed on the housing bottom plate. When the motor rotates, the V-belt drives the driven belt pulley and the rotating shaft to rotate, and the tube-fin condenser is driven to rotate. The top edge of the motor is lower than the bottom edge of the tube fin type condenser so as to ensure that the tube fin type condenser does not interfere with the motor when rotating.
Further, the throttling device 160 includes a first throttling device 161 and a second throttling device 162 which are arranged in parallel, and the evaporator 170 includes a first evaporator 171 and a second evaporator 172 which are arranged in parallel; the outlet of the first throttling device is connected with the inlet of the first evaporator, and the outlet of the second throttling device is connected with the inlet of the second evaporator. Inlet pipelines of the two throttling devices are connected to an outlet of the liquid storage tank in parallel, and outlet pipelines of the two evaporators are connected to an inlet of the compressor in parallel; a first electromagnetic valve is arranged on the first evaporator inlet pipeline, and a second electromagnetic valve is arranged on the second evaporator inlet pipeline; the first electromagnetic valve and the second electromagnetic valve are respectively electrically connected with the controller. During operation, according to the dehumidification requirement of reality, select to put into operation one or two evaporimeters and dehumidify to improve the dehumidification precision. In addition, according to actual requirements, more than two evaporators and corresponding throttling devices are arranged in parallel in the scheme, and the protection scope of the invention also falls.
Further, the first throttling device 161 and the second throttling device 162 are electronic expansion valves for adaptively adjusting the superheat degree of the evaporator.
Furthermore, the air conditioning unit also comprises a first temperature sensor and a first humidity sensor which are arranged at the air inlet, a second temperature sensor and a second humidity sensor which are arranged at the first evaporator, a third temperature sensor and a third humidity sensor which are arranged at the second evaporator, and a fourth temperature sensor and a fourth humidity sensor which are arranged at the air supply opening; the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the first humidity sensor, the second humidity sensor, the third humidity sensor and the fourth humidity sensor are respectively electrically connected with the controller. The air temperature and humidity can be automatically detected, and the running state of the air conditioning unit can be automatically adjusted conveniently. The various temperature and humidity sensors are not shown.
Referring to fig. 6, the present invention also provides a corresponding control method for the evaporative cooling dehumidification air conditioning unit, the control method includes the following steps:
s100, presetting the moisture content D0 and the dry bulb temperature T0 of air in the controller;
s200, the controller receives a starting instruction, and respectively controls an air inlet electric air valve and an air supply electric air valve to be opened, and respectively controls the compressor, the fan wall, the water pump and the axial flow fan to be started; controlling the motors of the two rotating devices to rotate and driving the included angle between each tube-fin condenser and the length direction of the shell to be 60 degrees, namely the included angle between the two tube-fin condensers is 120 degrees, and then executing the step S300;
s300, the controller receives an operation mode selected by a user; when the selected operation mode is the dehumidification cooling mode, executing step S410; when the selected operation mode is the dehumidification mode, executing step S420; when the selected operation mode is the ventilation mode, performing step S430;
s410, the controller conducts dehumidification regulation by controlling the opening and closing states of the first electromagnetic valve and the second electromagnetic valve; the controller drives the tube-fin condenser to rotate by controlling the motors of the two rotating devices to rotate so as to regulate the temperature;
s420, the controller conducts dehumidification regulation by controlling the opening and closing states of the first electromagnetic valve and the second electromagnetic valve; the controller respectively controls the motors of the two rotating devices to rotate until the two tube-fin condensers are parallel to the length direction of the shell;
and S430, the controller controls the compressor to stop running, and respectively controls the motors of the two rotating devices to rotate until the two tube-fin condensers are parallel to the length direction of the shell.
Further, in the control method of the evaporative cooling dehumidification air conditioning unit, the step S410 specifically includes:
the first humidity sensor feeds back the detected actual moisture content D1 at the air inlet to the controller, the second humidity sensor feeds back the detected actual moisture content D2 at the first tube-fin condenser to the controller, and the third humidity sensor feeds back the detected actual moisture content D3 at the second tube-fin condenser to the controller; the fourth humidity sensor feeds back the detected actual moisture content D4 at the air supply opening to the controller; the first temperature sensor feeds back the detected actual dry bulb temperature T1 at the air inlet to the controller, the second temperature sensor feeds back the detected actual dry bulb temperature T2 at the first tube fin condenser to the controller, and the third temperature sensor feeds back the detected actual dry bulb temperature T3 at the second tube fin condenser to the controller; the fourth humidity sensor feeds back the detected actual dry bulb temperature T4 at the air supply opening to the controller; the controller compares the received moisture contents D1, D2, D3 and D4 with a preset moisture content D0, and controls the first electromagnetic valve and the second electromagnetic valve to be opened if D1 is not less than (D0+10) g/kg; if D2 ═ g/kg (D0+ -0.1), the second electromagnetic valve is controlled to be closed, if D1 < (D0+10) g/kg, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be closed, and when D4 ═ D3 ═ g/kg (D0+ -0.1), the working state of the compressor is kept unchanged; the controller compares the received actual temperatures T1, T2, T3 and T4 with a preset dry bulb temperature T0, if (T3+10) is more than or equal to T0, the two rotating devices are respectively controlled to rotate so that the included angle between each tube-fin condenser and the length direction of the shell is reduced, if (T3+10) is less than T0, the motors of the two rotating devices are respectively controlled to rotate so that the included angle between each tube-fin condenser and the length direction of the shell is increased, and when T4 is equal to (T0 +/-0.5), each rotating device is kept not to rotate; when T4 ≦ T0, and D4 ≦ D0, then step S430 is performed. When the air conditioner set is provided with more than two evaporators and corresponding throttling devices in parallel in practical application, the control of the number of the evaporators by adopting the similar method also falls into the protection scope of the invention.
Further, in the control method of the evaporative cooling dehumidification air conditioning unit, the step S420 specifically includes:
the controller controls the motors of the two rotating devices to rotate so that the two finned condensers are parallel to the length direction of the shell; the first humidity sensor feeds back the detected actual moisture content D1 at the air inlet to the controller, the second humidity sensor feeds back the detected actual moisture content D2 at the first tube-fin condenser to the controller, and the third humidity sensor feeds back the detected actual moisture content D3 at the second tube-fin condenser to the controller; the fourth humidity sensor feeds back the detected actual moisture content D4 at the air supply opening to the controller; the controller compares the received moisture contents D, D2, D3 and D4 with a preset moisture content D0, and if D1 is more than or equal to (D0+10) g/kg, the controller controls the first electromagnetic valve and the second electromagnetic valve to be opened; if D2 ═ g/kg (D0+ -0.1), the second electromagnetic valve is controlled to be closed, if D1 < (D0+10) g/kg, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be closed, and when D4 ═ D3 ═ g/kg (D0+ -0.1), the working state of the compressor is kept unchanged; when T4 ≦ T0 and D4 ≦ D0, then step S430 is performed.
Further, in the control method of the evaporative cooling dehumidification air conditioning unit, the step S430 further includes: when the temperature and the moisture content of the air dry bulb at the air supply port cannot simultaneously satisfy T4-T0 and D4-D0, the compressor is started and the step S420 is executed.
In conclusion, the evaporative cooling dehumidification air conditioning unit adopts the evaporative condenser to condense the refrigerant, so that the temperature of the condenser and the evaporation temperature of the refrigeration system are reduced, and the dehumidification effect of the air conditioning unit is improved; the two tube fin condensers are rotatably arranged in the shell, and the contact area between the tube fin condensers and air flow can be adjusted by rotating the two tube fin condensers so as to accurately adjust the temperature of the dehumidified air; when the temperature of the dehumidified air does not need to be adjusted, the two tube fin condensers can be rotated to be parallel to the length direction of the shell so as to reduce the resistance of the tube fin condensers to air flow, and therefore the purpose of energy conservation is achieved. The control method realizes that the air conditioning unit can operate in a dehumidification temperature regulation mode, a dehumidification mode and a ventilation mode, improves the applicability of the air conditioning unit and achieves the aim of energy conservation. The rotation angle of the tube-fin condenser can be conveniently adjusted by arranging the motor to drive the rotating shaft in a belt pulley mode. Through setting up two evaporimeters and corresponding throttling arrangement, improved the dehumidification precision.
It should be understood that equivalents and modifications to the invention as described herein may occur to those skilled in the art, and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (10)
1. An evaporative cooling dehumidification air conditioning unit comprises a shell, a compressor, a condenser, a liquid storage tank, a throttling device and an evaporator, wherein the compressor, the condenser, the liquid storage tank, the throttling device and the evaporator are arranged in the shell and are sequentially connected in a circulating manner; the water pump is arranged below the evaporative condenser, and the axial flow fan is arranged above the evaporative condenser; the condenser comprises a first tube fin condenser and a second tube fin condenser which are arranged in parallel; the two tube fin condensers are respectively arranged in the shell in a horizontally rotatable manner through a rotating device; the evaporative condenser, the evaporator, the throttling device, the tube-fin condenser and the fan wall are sequentially arranged along the length direction of the shell; an air inlet and a corresponding air inlet electric air valve are arranged at the side surface of the shell corresponding to the position between the evaporative condenser and the evaporator, and an air supply outlet and a corresponding air supply electric air valve are arranged at one end of the shell adjacent to the fan wall; the compressor, the throttling device, the two rotating devices, the water pump, the axial flow fan, the air inlet electric air valve and the air supply electric air valve are respectively and electrically connected with the controller; the temperature of the dehumidified air is accurately adjusted by rotating the two tube-fin condensers so as to adjust the contact area of the tube-fin condensers and the air flow; when the temperature of the dehumidified air does not need to be adjusted, the two tube-fin condensers can be rotated to the position parallel to the airflow direction.
2. The evaporative cooling and dehumidifying air conditioning unit as claimed in claim 1, wherein each of the rotating devices includes a motor installed vertically downward, a driving pulley mounted on a main shaft of the motor, a bearing seat mounted on a bottom plate of the housing, a rotating shaft rotatably connected to the bearing seat through a bearing, and a driven pulley mounted on the rotating shaft; the driving belt pulley is connected with the driven belt pulley through a triangular belt; one end of the rotating shaft, which is opposite to the bearing block, is fixedly connected with the bottom of the tube-fin condenser; and the motors of the two rotating devices are respectively and electrically connected with the controller.
3. The evaporative cooling and dehumidification air conditioning unit as set forth in claim 1 or 2, wherein said throttling device comprises a first throttling device and a second throttling device arranged in parallel, and said evaporator comprises a first evaporator and a second evaporator arranged in parallel; an outlet of the first throttling device is connected with an inlet of the first evaporator, and an outlet of the second throttling device is connected with an inlet of the second evaporator; a first electromagnetic valve is arranged on the first evaporator inlet pipeline, and a second electromagnetic valve is arranged on the second evaporator inlet pipeline; the first electromagnetic valve and the second electromagnetic valve are respectively electrically connected with the controller.
4. The evaporative cooling dehumidification air conditioning unit as set forth in claim 3, wherein the first and second throttling means are electronic expansion valves for adaptive adjustment of superheat of the evaporator.
5. The evaporative cooling and dehumidification air conditioning unit as set forth in claim 3, further comprising a first temperature sensor and a first humidity sensor disposed at the air inlet, a second temperature sensor and a second humidity sensor disposed at the first evaporator, a third temperature sensor and a third humidity sensor disposed at the second evaporator, and a fourth temperature sensor and a fourth humidity sensor disposed at the air outlet; the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the first humidity sensor, the second humidity sensor, the third humidity sensor and the fourth humidity sensor are respectively electrically connected with the controller.
6. The evaporative cooling and dehumidification air conditioning unit as recited in claim 1, wherein a primary filter and a secondary filter are sequentially disposed between the air inlet and the evaporator.
7. The evaporative cooling dehumidification air conditioning unit control method as set forth in claim 5, comprising the steps of:
s100, presetting the moisture content D0 and the dry bulb temperature T0 of air in the controller;
s200, the controller receives a starting instruction, and respectively controls an air inlet electric air valve and an air supply electric air valve to be opened, and respectively controls the compressor, the fan wall, the water pump and the axial flow fan to be started; controlling the motors of the two rotating devices to rotate and driving each tube fin type condenser to form an included angle of 60 degrees with the length direction of the shell, and then executing the step S300;
s300, the controller receives an operation mode selected by a user; when the selected operation mode is the dehumidification cooling mode, executing step S410; when the selected operation mode is the dehumidification mode, executing the step
S420; when the selected operation mode is the ventilation mode, performing step S430;
s410, the controller conducts dehumidification regulation by controlling the opening and closing states of the first electromagnetic valve and the second electromagnetic valve; the controller drives the tube fin type condenser to rotate by controlling the motors of the two rotating devices to rotate so as to regulate the temperature;
s420, the controller conducts dehumidification regulation by controlling the opening and closing states of the first electromagnetic valve and the second electromagnetic valve; the controller respectively controls the motors of the two rotating devices to rotate until the two tube-fin condensers are parallel to the length direction of the shell;
and S430, the controller controls the compressor to stop running, and respectively controls the motors of the two rotating devices to rotate until the two tube-fin condensers are parallel to the length direction of the shell.
8. The method according to claim 7, wherein the step S410 specifically includes:
the first humidity sensor feeds back the detected actual moisture content D1 at the air inlet to the controller, the second humidity sensor feeds back the detected actual moisture content D2 at the first tube-fin condenser to the controller, and the third humidity sensor feeds back the detected actual moisture content D3 at the second tube-fin condenser to the controller; the fourth humidity sensor feeds back the detected actual moisture content D4 at the air supply opening to the controller; the first temperature sensor feeds back the detected actual dry bulb temperature T1 at the air inlet to the controller, the second temperature sensor feeds back the detected actual dry bulb temperature T2 at the first tube fin condenser to the controller, and the third temperature sensor feeds back the detected actual dry bulb temperature T3 at the second tube fin condenser to the controller; the fourth humidity sensor feeds back the detected actual dry bulb temperature T4 at the air supply opening to the controller; the controller compares the received moisture contents D1, D2, D3 and D4 with a preset moisture content D0, and controls the first electromagnetic valve and the second electromagnetic valve to be opened if D1 is not less than (D0+10) g/kg; if D2 ═ g/kg (D0+ -0.1), the second electromagnetic valve is controlled to be closed, if D1 < (D0+10) g/kg, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be closed, and when D4 ═ D3 ═ g/kg (D0+ -0.1), the working state of the compressor is kept unchanged; the controller compares the received actual temperatures T1, T2, T3 and T4 with a preset dry bulb temperature T0, if (T3+10) is more than or equal to T0, the controller respectively controls the two rotating devices to rotate so that the included angle between each tube-fin condenser and the length direction of the shell is reduced, if (T3+10) < T0, the controller respectively controls the motors of the two rotating devices to rotate so that the included angle between each tube-fin condenser and the length direction of the shell is increased, and when T4 is (T0 +/-0.5), each rotating device is kept not to rotate; when T4 ≦ T0, and D4 ≦ D0, then step S430 is performed.
9. The method as claimed in claim 7, wherein the step S420 specifically includes:
the controller controls the motors of the two rotating devices to rotate so that the two finned condensers are parallel to the length direction of the shell; the first humidity sensor feeds back the detected actual moisture content D1 at the air inlet to the controller, the second humidity sensor feeds back the detected actual moisture content D2 at the first tube-fin condenser to the controller, and the third humidity sensor feeds back the detected actual moisture content D3 at the second tube-fin condenser to the controller; the fourth humidity sensor feeds back the detected actual moisture content D4 at the air supply opening to the controller; the controller compares the received moisture contents D, D2, D3 and D4 with a preset moisture content D0, and controls the first electromagnetic valve and the second electromagnetic valve to be opened if D1 is not less than (D0+10) g/kg; if D2 ═ g/kg (D0+ -0.1), the second electromagnetic valve is controlled to be closed, if D1 < (D0+10) g/kg, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be closed, and when D4 ═ D3 ═ g/kg (D0+ -0.1), the working state of the compressor is kept unchanged; when T4 ≦ T0, and D4 ≦ D0, then step S430 is performed.
10. The evaporative cooling dehumidification air conditioning unit control method as claimed in claim 8 or 9, wherein the step S430 further comprises: when the temperature and the moisture content of the air dry bulb at the air supply port cannot simultaneously satisfy T4 ≤ T0 and D4 ≤ D0, the compressor is started, and the step S420 is executed.
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| CN110398007A (en) * | 2019-07-02 | 2019-11-01 | 广东申菱环境系统股份有限公司 | A kind of water cooler and its control method of included fan wall |
| CN111609591B (en) * | 2020-04-24 | 2021-07-30 | 珠海格力电器股份有限公司 | Double-temperature air conditioning system, control method and air conditioner |
| WO2022201189A1 (en) * | 2021-03-23 | 2022-09-29 | Symphony Limited | An apparatus for supporting and packaging of an article of manufacture |
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