CN111442558A - Temperature and humidity separately-controlled air conditioning system based on different evaporation temperatures of single machine and control method - Google Patents
Temperature and humidity separately-controlled air conditioning system based on different evaporation temperatures of single machine and control method Download PDFInfo
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- CN111442558A CN111442558A CN202010265023.0A CN202010265023A CN111442558A CN 111442558 A CN111442558 A CN 111442558A CN 202010265023 A CN202010265023 A CN 202010265023A CN 111442558 A CN111442558 A CN 111442558A
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- F25B41/30—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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine, which comprises: the cold and heat source system comprises a single-machine compressor with different evaporation temperatures, a first four-way valve, a second four-way valve, an outdoor heat exchanger, a liquid viewing mirror, a drying filter, a first ball valve, a second ball valve, a third ball valve, a fourth ball valve, a first electronic expansion valve, a second electronic expansion valve, a first indoor heat exchanger and a second indoor heat exchanger; the tail end system comprises a temperature control tail end and a humidity control tail end for graded utilization of energy; the first water system comprises a first water circulation loop formed by a first water circulation pump, a first indoor heat exchanger and a wet treatment section; and the second water system comprises a second circulating water pump, a second indoor heat exchanger, a second water circulating loop formed by a temperature control tail end, and a third water circulating loop formed by the second circulating water pump, the second indoor heat exchanger, the pretreatment section and the retreatment section. The invention also provides a control method of the air conditioning system.
Description
Technical Field
The invention relates to an air conditioning system, in particular to a temperature and humidity separately-controlled air conditioning system and a control method based on different evaporation temperatures of a single machine.
Background
The Yangtze river basin has high annual humidity, especially in summer. Considering the comfort, energy efficiency and other factors of the air conditioning system, the area is preferably provided with a temperature and humidity separately controlled air conditioning system. Compared with the traditional air conditioning system, the dual-evaporation-temperature and humidity separate control air conditioning system is more energy-saving.
The research on double-evaporation-temperature air conditioning systems and machines in China relates to multiple aspects, but the research on different-evaporation-temperature and humidity separately-controlled air conditioning systems is less. For example, patent CN205505465U proposes a dual-evaporating-temperature air conditioning system, but the system has the disadvantages of single function, poor reliability of the refrigerating unit, easy liquid carrying in the middle chamber, poor performance coefficient, etc. For example, patent CN106524581A proposes a frost-free heat recovery type fresh air heat pump unit with a single compressor and two evaporation temperatures. The heat pump unit is functionally designed to heat and is divided into two working conditions of ordinary heating and low-temperature heating, and the working conditions are switched according to actual needs. For example, patent CN104896786A provides a combined cooling and heating integrated machine with double evaporators, which can simultaneously supply cooling and heating to the room. For example, patent CN106679025A proposes a dual evaporation temperature air conditioner, which is designed to aim at a new air system. For example, patent CN102141316A provides a dual-evaporation temperature air conditioner with independent temperature and humidity control, which can only refrigerate in summer and is suitable for the place with small refrigerating capacity.
In addition, the double-evaporation-temperature air conditioning system in the prior art also has the problems of complex system structure, higher cost, higher control difficulty, insufficient energy efficiency and the like.
Disclosure of Invention
The present invention is made to solve the above problems, and an object of the present invention is to provide a temperature and humidity separately controlled air conditioning system and a control method based on different evaporation temperatures of a single unit.
The invention provides a temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine, which is characterized by comprising the following components: the cold and heat source system comprises a single-machine different evaporation temperature compressor, a first four-way valve and a second four-way valve which are connected with the single-machine different evaporation temperature compressor, an outdoor heat exchanger, a liquid viewing mirror, a drying filter, a first ball valve, a first electronic expansion valve, a first indoor heat exchanger, a second ball valve, a second electronic expansion valve and a second indoor heat exchanger, wherein the outdoor heat exchanger, the liquid viewing mirror, the drying filter, the first ball valve, the first electronic expansion valve and the second indoor heat exchanger are connected with the first four-way valve through pipelines; the tail end system comprises a temperature control tail end and a humidity control tail end which are connected with the second indoor heat exchanger, wherein the humidity control tail end comprises a pretreatment section connected with the second indoor heat exchanger, a humidity treatment section connected with the first indoor heat exchanger and a reprocessing section connected with the second indoor heat exchanger; the first water system comprises a first water circulation loop formed by a first water circulation pump, a first indoor heat exchanger and a wet treatment section which are sequentially connected through water pipelines; and a second water system, which comprises a second circulating water pump, a second indoor heat exchanger, a second water circulating loop formed by a temperature control tail end and a third water circulating loop formed by a second circulating water pump, a second indoor heat exchanger, a pretreatment section and a reprocessing section which are sequentially connected through water pipelines, wherein the single-machine compressor with different evaporation temperatures comprises a first air suction port, a second air suction port and an air exhaust port, the first air suction port is connected with a first four-way valve interface E1, the second air suction port is connected with a second four-way valve interface E2, the air exhaust port is connected with a first four-way valve interface C1 and a second four-way valve interface C2, a first four-way valve interface D1 is connected with one end of the outdoor heat exchanger, the other end of the outdoor heat exchanger is sequentially connected with a liquid viewing mirror, a drying filter, a first ball valve, a first electronic expansion valve, a first indoor heat exchanger and a first four-way, the temperature control system comprises a first loop, a second four-way valve interface D2, a liquid viewing mirror, a drying filter, a second ball valve, a second electronic expansion valve, a second indoor heat exchanger and a second four-way valve interface S2, wherein the other end of the outdoor heat exchanger is sequentially connected with the liquid viewing mirror, the drying filter, the second ball valve, the second electronic expansion valve, the second indoor heat exchanger and the second four-way valve interface S2 to form a second loop, a branch is arranged between the first loop and the second loop, one end of the branch is located between the first electronic expansion valve and the first indoor heat exchanger, the other end of the branch is located between the second electronic expansion valve and the second indoor heat exchanger, a third ball valve and a fourth ball valve are arranged in the branch, a temperature.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: the single-machine different evaporation temperature compressor is a double-cylinder rolling rotor type compressor, two cylinders have a 180-degree difference, the two cylinders are symmetrically arranged, the two cylinders operate in a frequency conversion mode, and the rotating speed of the single-machine different evaporation temperature compressor is adjusted according to the water outlet temperature of the second indoor heat exchanger.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: wherein, the outside of outdoor heat exchanger still is equipped with the fan, and the rotational speed of fan is adjusted according to the pressure of outdoor heat exchanger.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: the opening degree of the first electronic expansion valve is adjusted according to the outlet water temperature of the first indoor heat exchanger.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: the opening degree of the second electronic expansion valve is adjusted according to the superheat degree of the refrigerant of the second indoor heat exchanger.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: wherein, the wet return kneck of accuse temperature end still is equipped with first control by temperature change electric three-way valve, and the aperture of first control by temperature change electric three-way valve is adjusted according to indoor air temperature.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: wherein, the wet return mouth of preliminary treatment section still is equipped with the electronic three-way valve of second control by temperature change, and the aperture of the electronic three-way valve of second control by temperature change adjusts according to the air temperature of preliminary treatment section exit.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: wherein, wet return pipe kneck of handling section still is equipped with the electronic three-way valve of third control by temperature change, and the aperture of the electronic three-way valve of third control by temperature change adjusts according to the air temperature of wet section exit.
The temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of a single machine provided by the invention can also have the following characteristics: wherein, the wet return mouth of reprocessing section still is equipped with the electronic three-way valve of fourth control by temperature change, and the aperture of the electronic three-way valve of fourth control by temperature change is adjusted according to the air temperature of reprocessing section exit.
The invention also provides a control method of the temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of the single machine, which is characterized by comprising the following steps: the method comprises the steps of enabling interfaces E1 and S1 of the first four-way valve to be communicated and interfaces D1 and C1 of the second four-way valve to be communicated by adjusting the first four-way valve and the second four-way valve, enabling interfaces E2 and S2 of the second four-way valve to be communicated and interfaces D2 and C2 of the second four-way valve to be communicated, opening the first ball valve and the second ball valve, closing the third ball valve and the fourth ball valve, enabling interfaces C1 and S1 of the first four-way valve and interfaces D1 and E1 of the first electronic expansion valve to be communicated, enabling interfaces C2 and S2 of the second four-way valve to be communicated and interfaces D2 and E2 of the second four-way valve to be communicated by adjusting the first four-way valve and the second four-way valve, closing the first ball valve, opening the second ball valve, the third ball valve and the fourth ball valve, closing the first electronic expansion valve, and.
Action and Effect of the invention
According to the temperature and humidity separate control air conditioning system based on different evaporation temperatures of the single machine, the double four-way valves and the double-chamber inner heat exchangers are arranged for circulating circulation heat exchange of the refrigerant, and the humidity control tail end and the temperature control tail end are arranged for water circulation heat exchange with the double-chamber inner heat exchangers, so that independent control of indoor temperature and humidity can be realized in a refrigerating or heating mode; the system has simple design and few main components, so the system has low cost, strong operability and high controllability; because the functional structure design of the humidity control tail end is integrated with the energy grading utilization principle, and the compressor operates along with the cold/heat requirement in a frequency conversion mode, the energy efficiency of the system can be effectively improved; since some components can be adjusted according to the operation condition and the indoor environment, the operation state of the system can be effectively controlled. Therefore, the temperature and humidity separately-controlled air conditioning system based on different evaporation temperatures of the single machine is simple and flexible in form, is suitable for various air conditioning tail end forms, is low in system cost, strong in operability and high in controllability, and can realize efficient temperature and humidity separately control in the refrigeration mode and the heating mode. In addition, the control method of the temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of the single machine can effectively control the air conditioning system.
Drawings
FIG. 1 is a schematic structural diagram of a temperature and humidity separately controlled air conditioning system based on different evaporating temperatures of a single unit in an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of the temperature and humidity separately controlled air conditioning system based on different evaporating temperatures of a single machine in a cooling mode according to the embodiment of the present invention;
Fig. 3 is a schematic operation diagram of the temperature and humidity separately controlled air conditioning system based on different evaporating temperatures of a single machine in the heating mode according to the embodiment of the present invention.
Detailed Description
In order to make the technical means and functions of the present invention easy to understand, the present invention is specifically described below with reference to the embodiments and the accompanying drawings.
Fig. 1 is a schematic structural diagram of a temperature and humidity separately controlled air conditioning system based on different evaporating temperatures of a single machine in an embodiment of the present invention.
As shown in fig. 1, the temperature and humidity separately controlled air conditioning system 100 based on different evaporation temperatures of a single unit of the present embodiment includes a cold and heat source system, a terminal system, a first water system, and a second water system.
The cold and heat source system comprises a single-machine different evaporation temperature compressor 1, a first four-way valve 2 and a second four-way valve 3 which are connected with the single-machine different evaporation temperature compressor 1, an outdoor heat exchanger 4 which is connected with the first four-way valve 2 through a pipeline, a liquid viewing mirror 5, a drying filter 6, a first ball valve 7, a first electronic expansion valve 8, a first indoor heat exchanger 9, a second ball valve 10 which is connected with the second four-way valve 3, the outdoor heat exchanger 4, the liquid viewing mirror 5 and the drying filter 6 through a pipeline, a second electronic expansion valve 11 and a second indoor heat exchanger 12.
The single-machine different evaporation temperature compressor 1 is a double-cylinder rolling rotor type compressor, two cylinders have a 180-degree difference, the two cylinders are symmetrically arranged, the two cylinders operate in a frequency conversion mode, the single-machine different evaporation temperature compressor is suitable for occasions with large power, and the rotating speed of the single-machine different evaporation temperature compressor 1 is adjusted according to the water outlet temperature of the second indoor heat exchanger 12.
The single-unit different evaporation temperature compressor 1 has a first suction port 101, a second suction port 102 and a discharge port 103,
The first suction port 101 is connected to a first four-way valve 2 port E1, the second suction port 102 is connected to a second four-way valve 3 port E2,
The exhaust port 103 is connected to a first four-way valve 2 port C1 and a second four-way valve 3 port C2.
The first four-way valve 2 interface D1 is connected with one end of the outdoor heat exchanger 4, and the other end of the outdoor heat exchanger 4 is sequentially connected with the liquid viewing mirror 5, the drying filter 6, the first ball valve 7, the first electronic expansion valve 8, the first indoor heat exchanger 9 and the first four-way valve 2 interface S1 to form a first loop.
The second four-way valve 3 interface D2 is connected with one end of the outdoor heat exchanger 4, and the other end of the outdoor heat exchanger 4 is connected with the liquid viewing mirror 5, the drying filter 6, the second ball valve 10, the second electronic expansion valve 11, the second indoor heat exchanger 12 and the second four-way valve 3 interface S2 in sequence to form a second loop.
A branch is arranged between the first loop and the second loop, one end of the branch is positioned between the first electronic expansion valve 8 and the first indoor heat exchanger 9, the other end of the branch is positioned between the second electronic expansion valve 11 and the second indoor heat exchanger 12, and a third ball valve and a fourth ball valve 13 and 14 are arranged in the branch.
The outer side of the outdoor heat exchanger 4 is also provided with a fan 41, and the rotating speed of the fan 41 is adjusted according to the pressure of the outdoor heat exchanger 4.
The opening degree of the first electronic expansion valve 8 is adjusted according to the outlet water temperature of the first indoor heat exchanger 9.
The opening degree of the second electronic expansion valve 11 is adjusted according to the degree of superheat of the refrigerant of the second indoor heat exchanger 12.
The end system comprises a temperature control end 15 connected with the second indoor heat exchanger 12 and a humidity control end 16, wherein the humidity control end 16 comprises a pretreatment section 161 connected with the second indoor heat exchanger 12, a wet treatment section 162 connected with the first indoor heat exchanger 9 and a reprocessing section 163 connected with the second indoor heat exchanger 12.
The temperature control terminal 15 is used for controlling the indoor temperature, and the humidity control terminal 16 is used for controlling the indoor humidity.
A first temperature control electric three-way valve 151 is further arranged at the interface of the water return pipe of the temperature control tail end 15, and the opening degree of the first temperature control electric three-way valve 151 is adjusted according to the indoor air temperature.
In this embodiment, the pretreatment section 161, the wet treatment section 162, and the reprocessing section 163 do not need to be connected to each other, and the humidity control end 16 may further include other functional sections such as a primary filter section, a secondary filter section, or a return air section according to actual requirements.
A second temperature control electric three-way valve 1611 is further arranged at the interface of the water return pipe of the pretreatment section 161, and the opening degree of the second temperature control electric three-way valve 1611 is adjusted according to the air temperature at the outlet of the pretreatment section 161.
A third temperature control electric three-way valve 1621 is further arranged at the interface of the water return pipe of the wet treatment section 162, and the opening degree of the third temperature control electric three-way valve 1621 is adjusted according to the air temperature at the outlet of the wet treatment section 162.
A fourth temperature-control electric three-way valve 1631 is further arranged at the interface of the water return pipe of the reprocessing section 163, and the opening degree of the fourth temperature-control electric three-way valve 1631 is adjusted according to the air temperature at the outlet of the reprocessing section 163.
The first water system 17 includes a first water circulation loop formed by a first circulation water pump 171, a first indoor heat exchanger 9, and a wet treatment section 162 connected in series by water lines.
The second water system 18 includes a second water circulation loop formed by a second water circulation pump 181, a second indoor heat exchanger 12, and a temperature control terminal 15, which are sequentially connected by water pipes, and a third water circulation loop formed by a second water circulation pump 181, a second indoor heat exchanger 12, a pretreatment stage 161, and a re-treatment stage 163, which are sequentially connected by water pipes.
The embodiment further provides a control method of the temperature and humidity separately controlled air conditioning system 100 based on different evaporation temperatures of the single machine to switch the system cooling mode and the system heating mode, which specifically comprises the following steps:
By adjusting the communication between the port E1 and the port S1, the port D1 and the port C1, the port E2 and the port S2, and when the port D2 and the port C2 are communicated, the first ball valve 7 and the second ball valve 10 are opened, the third ball valve 13 and the fourth ball valve 14 are closed, and the first electronic expansion valve 8 and the second electronic expansion valve 11 are opened, wherein the system is in a refrigeration mode.
Fig. 2 is a schematic diagram of the operation of the temperature and humidity separately controlled air conditioning system based on different evaporating temperatures of a single machine in the cooling mode according to the embodiment of the present invention.
As shown in fig. 2, in the cooling mode, the high-temperature and high-pressure compressed gas refrigerant flows partially into the C1D1 path of the first four-way valve 2 and partially into the C2D2 path of the second four-way valve 3, and the two flows are mixed before entering the outdoor heat exchanger 4, and after mixing, the refrigerant flows into the outdoor heat exchanger 4 to be condensed, and the refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant.
Then, the condensed medium-temperature high-pressure liquid refrigerant passes through a liquid viewing mirror 5 and a drying filter 6 and then is divided into two branches, one branch flows into a first electronic expansion valve 8 through a first ball valve 7, and the other branch flows into a second electronic expansion valve 11 through a second ball valve 10. The flow rate of each branch refrigerant is determined by the opening degree of the first electronic expansion valve 8 and the second electronic expansion valve 11, and the medium-temperature high-pressure liquid refrigerant becomes the low-temperature low-pressure liquid refrigerant after being throttled by the electronic expansion valves.
The refrigerant throttled by the first electronic expansion valve 8 flows into the first indoor heat exchanger 9 to exchange heat with the first water system 17, the refrigerant takes away heat of the first water system 17 to become high-temperature low-pressure gaseous refrigerant, and water in the first water system 17 dissipates heat to become low-temperature water supply.
The refrigerant throttled by the second electronic expansion valve 11 flows into the second indoor heat exchanger 12 to exchange heat with the second water system 18, the refrigerant takes away heat of the second water system 18 to become high-temperature low-pressure gaseous refrigerant, and water in the second water system 18 dissipates heat to become low-temperature water supply.
The temperature of the water supplied to the heat-exchanged first water system 17 is lower than the temperature of the water supplied to the heat-exchanged second water system 18. The pressure of the refrigerant after heat exchange by the first indoor heat exchanger 9 is lower than the pressure of the refrigerant after heat exchange by the second indoor heat exchanger 12.
The high-temperature low-pressure gaseous refrigerant after heat exchange by the first indoor heat exchanger 9 flows into the first air suction port 101 of the single-machine compressor 1 with different evaporation temperatures through the S1E1 channel of the first four-way reversing valve 2.
The high-temperature low-pressure gaseous refrigerant after heat exchange in the second indoor heat exchanger 12 flows into the second suction port 102 of the single-machine compressor 1 with different evaporating temperatures through the S2E2 channel of the second four-way reversing valve 3.
The refrigerant in the first suction port 101 is compressed first, and when the refrigerant is compressed to the pressure of the refrigerant in the second suction port 102, the refrigerant in the second suction port 102 enters the compressor to be mixed and compressed, and the compressed refrigerant becomes a high-temperature high-pressure gaseous refrigerant.
The water in the first water system 17 after heat exchange by the first indoor heat exchanger 9 flows into the wet processing section 162 of the humidity control end 16 to dehumidify the air in the wet processing section 162, and then flows into the first indoor heat exchanger 9 to exchange heat.
The water in the second water system 18 after heat exchange by the second indoor heat exchanger 12 is divided into two branches, and one branch flows into the temperature control tail end 15 for heat exchange; the other path flows into the pretreatment section 161 of the humidity control tail end 16, the air in the pretreatment section 161 is cooled, the auxiliary humidity treatment is carried out, then the air flows into the reprocessing section 163, the air in the reprocessing section 163 is heated, finally the two paths of backwater after heat exchange are mixed, and then the mixed water flows into the second indoor heat exchanger 12 for heat exchange.
By adjusting the communication between the port C1 and the port S1, the communication between the port D1 and the port E1, the communication between the port C2 and the port S2, and the communication between the port D2 and the port E2, the first ball valve 7 is closed, the second ball valve 10, the third ball valve 13 and the fourth ball valve 14 are opened, the first electronic expansion valve 8 is closed, and the second electronic expansion valve 11 is opened, at this time, the system is in a heating mode.
Fig. 3 is a schematic operation diagram of the temperature and humidity separately controlled air conditioning system based on different evaporating temperatures of a single machine in the heating mode according to the embodiment of the present invention.
As shown in fig. 3, in the heating mode, the compressed high-temperature and high-pressure gaseous refrigerant is divided into two paths, one path passes through the C1S1 channel of the first four-way reversing valve 2, flows into the first indoor heat exchanger 9, exchanges heat with the first water system 17, and becomes a medium-temperature and high-pressure liquid refrigerant, and water in the first water system 17 absorbs heat to become high-temperature water; the other path of the refrigerant flows into a C2S2 channel of the second four-way reversing valve 3, flows into the second indoor heat exchanger 12, exchanges heat with the second water system 18, and becomes a medium-temperature high-pressure liquid refrigerant, and water in the second water system 18 absorbs heat to become high-temperature water.
The two paths of medium-temperature high-pressure liquid refrigerants subjected to heat exchange by the heat exchanger are mixed before entering the second electronic expansion valve 11, are throttled by the second electronic expansion valve 11 to become low-temperature low-pressure liquid refrigerants, and flow into the outdoor heat exchanger 4 to be evaporated and exchanged into high-temperature low-pressure gaseous refrigerants after passing through the drying filter 6 and the liquid viewing mirror 5.
The high-temperature low-pressure gaseous refrigerant after evaporation and heat exchange is divided into two paths, wherein one path of the high-temperature low-pressure gaseous refrigerant flows into the first air suction port 101 of the single-machine compressor 1 with different evaporation temperatures through the D1E1 channel of the first four-way reversing valve 2, and the other path of the high-temperature low-pressure gaseous refrigerant flows into the second air suction port 102 of the single-machine compressor 1 with different evaporation temperatures through the D2E2 channel of the second four-way reversing valve 3, and the high-temperature low-.
The first water system 17 after heat exchange by the first indoor heat exchanger 9 flows into the wet processing section 162, humidifies the air in the wet processing section 162, and then flows into the first indoor heat exchanger 9 for heat exchange.
The second water system 18 after heat exchange by the second indoor heat exchanger 12 is divided into two paths, and one path flows into the temperature control tail end 15 for heat exchange; the other path flows into the pretreatment section 161, the air in the pretreatment section 161 is subjected to small temperature rise, the air after auxiliary wet treatment flows into the reprocessing section 163, the air in the reprocessing section 163 is subjected to temperature rise, and finally the two paths of backwater after heat exchange are mixed and then flow into the second indoor heat exchanger 12 for heat exchange.
In this embodiment, the system operation state is controlled by adjusting a part of the components, and the control and adjustment process is as follows:
The rotating speed of the compressor is controlled by adjusting the frequency of the compressor 1 with different evaporating temperatures of the single machine according to the outlet water temperature of the second indoor heat exchanger 12, so that the outlet water temperature of the second indoor heat exchanger 12 is adjusted.
The rotation speed of the fan 41 at the outdoor heat exchanger 4 is adjusted according to the pressure value of the outdoor heat exchanger 4, thereby performing automatic control of the pressure of the outdoor heat exchanger 4.
And adjusting the opening degree of the first electronic expansion valve 8 according to the outlet water temperature of the first indoor heat exchanger 9, so as to control the outlet water temperature of the first indoor heat exchanger 9.
The opening degree of the second electronic expansion valve 11 is adjusted according to the superheat degree of the outlet of the second indoor heat exchanger 12, so that the superheat degree of the outlet of the second indoor heat exchanger 12 is controlled.
The valve opening degree of the first temperature-controlled electric three-way valve 151 of the temperature-controlled terminal 15 is adjusted according to the indoor air temperature, thereby adjusting the flow rate of water entering the temperature-controlled terminal 15.
The second temperature-controlled electric three-way valve 1611 is adjusted according to the air temperature at the outlet of the pre-treatment section 161, thereby adjusting the flow rate of water into the pre-treatment section 161.
The third temperature-controlled electric three-way valve 1621 is adjusted according to the air temperature at the outlet of the wet treatment stage 162, thereby adjusting the flow of water into the wet treatment stage 162.
The fourth temperature controlled electric three-way valve 1631 is adjusted according to the air temperature at the outlet of the reprocessing section 163 to thereby adjust the flow of water into the reprocessing section 163.
Effects and effects of the embodiments
According to the temperature and humidity separate control air conditioning system based on different evaporation temperatures of the single machine, as the double four-way valve and the double-chamber inner heat exchanger are arranged for circulating circulation heat exchange of the refrigerant, and the humidity control tail end and the temperature control tail end are arranged for water circulation heat exchange with the double-chamber inner heat exchanger, independent control of indoor temperature and humidity can be realized in a refrigerating or heating mode; the system has simple design and few main components, so the system has low cost, strong operability and high controllability; because the functional structure design of the humidity control tail end is integrated with the energy grading utilization principle, and the compressor operates along with the cold/heat requirement in a frequency conversion mode, the energy efficiency of the system can be effectively improved; since some components can be adjusted according to the operation condition and the indoor environment, the operation state of the system can be effectively controlled. Therefore, the temperature and humidity separately-controlled air conditioning system based on different evaporation temperatures of the single machine is simple and flexible in form, suitable for various air conditioning terminal forms, low in system cost, strong in operability and high in controllability, and can achieve efficient temperature and humidity separately control in the refrigeration mode and the heating mode. In addition, the control method of the temperature and humidity separately controlled air conditioning system based on different evaporation temperatures of the single machine can effectively control the air conditioning system.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (10)
1. The utility model provides a temperature and humidity divides accuse air conditioning system based on different evaporating temperature of unit which characterized in that includes:
The cold and heat source system comprises a single-machine different evaporation temperature compressor, a first four-way valve and a second four-way valve which are connected with the single-machine different evaporation temperature compressor, an outdoor heat exchanger, a liquid viewing mirror, a drying filter, a first ball valve, a first electronic expansion valve, a first indoor heat exchanger, a second ball valve, a second electronic expansion valve and a second indoor heat exchanger, wherein the outdoor heat exchanger, the liquid viewing mirror and the drying filter are connected with the first four-way valve through pipelines;
The tail end system comprises a temperature control tail end and a humidity control tail end which are connected with the second indoor heat exchanger, and the humidity control tail end comprises a pretreatment section connected with the second indoor heat exchanger, a wet treatment section connected with the first indoor heat exchanger and a reprocessing section connected with the second indoor heat exchanger;
The first water system comprises a first water circulation loop formed by a first water circulation pump, the first indoor heat exchanger and the wet treatment section which are sequentially connected through water pipelines; and
A second water system which comprises a second circulating water pump, a second indoor heat exchanger and a second water circulating loop formed by the temperature control tail end which are sequentially connected through water pipelines, and a third water circulating loop formed by the second circulating water pump, the second indoor heat exchanger, the pretreatment section and the re-treatment section which are sequentially connected through water pipelines,
Wherein the single-machine different evaporation temperature compressor is provided with a first air suction port, a second air suction port and an air exhaust port,
The first suction port is connected to the first four-way valve interface E1, the second suction port is connected to the second four-way valve interface E2, and the discharge port is connected to the first four-way valve interface C1 and the second four-way valve interface C2,
The first four-way valve interface D1 is connected with one end of the outdoor heat exchanger, the other end of the outdoor heat exchanger is connected with the liquid viewing mirror, the drying filter, the first ball valve, the first electronic expansion valve, the first indoor heat exchanger and the first four-way valve interface S1 in sequence to form a first loop,
The second four-way valve interface D2 is connected with one end of the outdoor heat exchanger, the other end of the outdoor heat exchanger is connected with the liquid viewing mirror, the drying filter, the second ball valve, the second electronic expansion valve, the second indoor heat exchanger and the second four-way valve interface S2 in sequence to form a second loop,
A branch is arranged between the first loop and the second loop, one end of the branch is positioned between the first electronic expansion valve and the first indoor heat exchanger, the other end of the branch is positioned between the second electronic expansion valve and the second indoor heat exchanger,
A third ball valve and a fourth ball valve are arranged in the branch,
The temperature control end is used for controlling and processing the indoor temperature, and the humidity control end is used for controlling and processing the indoor humidity.
2. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
The single-machine different evaporation temperature compressor is a double-cylinder rolling rotor type compressor, two cylinders have a 180-degree difference, the two cylinders are symmetrically arranged and run in a frequency conversion mode, and the rotating speed of the single-machine different evaporation temperature compressor is adjusted according to the water outlet temperature of the second indoor heat exchanger.
3. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
And a fan is further arranged on the outer side of the outdoor heat exchanger, and the rotating speed of the fan is adjusted according to the pressure of the outdoor heat exchanger.
4. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
The opening degree of the first electronic expansion valve is adjusted according to the outlet water temperature of the first indoor heat exchanger.
5. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
Wherein the opening degree of the second electronic expansion valve is adjusted according to the refrigerant superheat degree of the second indoor heat exchanger.
6. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
The temperature control device is characterized in that a first temperature control electric three-way valve is further arranged at the position of a water return pipe joint at the temperature control tail end, and the opening degree of the first temperature control electric three-way valve is adjusted according to the indoor air temperature.
7. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
And a second temperature control electric three-way valve is further arranged at the joint of the water return pipe of the pretreatment section, and the opening degree of the second temperature control electric three-way valve is adjusted according to the air temperature at the outlet of the pretreatment section.
8. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
And a third temperature control electric three-way valve is further arranged at the position of the water return pipe interface of the wet treatment section, and the opening degree of the third temperature control electric three-way valve is adjusted according to the air temperature at the position of the outlet of the wet treatment section.
9. The temperature and humidity separately controlled air conditioning system based on single machine different evaporation temperature according to claim 1, characterized in that:
And a fourth temperature control electric three-way valve is further arranged at the joint of the water return pipe of the reprocessing section, and the opening degree of the fourth temperature control electric three-way valve is adjusted according to the air temperature at the outlet of the reprocessing section.
10. The control method of the temperature and humidity separately controlled air conditioning system based on the single machine different evaporation temperatures as claimed in claim 1, characterized in that:
Wherein, by adjusting the first four-way valve and the second four-way valve, the interfaces E1 and S1 and D1 and C1 of the first four-way valve are communicated, the interfaces E2 and S2 and the interfaces D2 and C2 of the second four-way valve are communicated, the first ball valve and the second ball valve are opened, the third ball valve and the fourth ball valve are closed, the first electronic expansion valve and the second electronic expansion valve are opened, and the system is switched to a cooling mode,
By adjusting the first four-way valve and the second four-way valve, the interface C1 of the first four-way valve is communicated with S1, the interface D1 of the first four-way valve is communicated with E1, the interface C2 of the second four-way valve is communicated with S2, and the interface D2 of the second four-way valve is communicated with E2, the first ball valve is closed, the second ball valve, the third ball valve and the fourth ball valve are opened, the first electronic expansion valve is closed, the second electronic expansion valve is opened, and the system is switched to a heating mode at the moment.
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