CN110822544A - Fixed-frequency air conditioning system for improving indoor comfort - Google Patents
Fixed-frequency air conditioning system for improving indoor comfort Download PDFInfo
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- CN110822544A CN110822544A CN201911070902.1A CN201911070902A CN110822544A CN 110822544 A CN110822544 A CN 110822544A CN 201911070902 A CN201911070902 A CN 201911070902A CN 110822544 A CN110822544 A CN 110822544A
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- heat exchanger
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
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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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- 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 a fixed-frequency air conditioning system for improving indoor comfort, which comprises a refrigerant circulation loop formed by connecting a compressor, an outdoor heat exchanger, a first indoor heat exchanger and a first capillary tube through a pipeline, and a heat exchange branch connected with the outdoor heat exchanger in parallel, wherein the heat exchange branch comprises a first end communicated on the pipeline between the outdoor heat exchanger and the compressor and a second end communicated on the pipeline between the outdoor heat exchanger and the first indoor heat exchanger, and an electronic expansion valve and a second indoor heat exchanger are sequentially connected in series on the heat exchange branch along the direction from the first end to the second end; the first indoor heat exchanger and the second indoor heat exchanger are sequentially arranged on the same air supply pipeline along the air supply direction; the constant-frequency air conditioning system further comprises a temperature sensor and a controller, wherein the temperature sensor is used for detecting the indoor environment temperature, and after the constant-frequency air conditioning system enters the refrigeration mode, the controller adjusts the opening degree of the electronic expansion valve based on the indoor temperature Ta acquired by the temperature sensor.
Description
Technical Field
The invention relates to the technical field of air conditioning systems, in particular to a fixed-frequency air conditioning system for improving indoor comfort.
Background
With the increase of the popularity of air conditioners, people more widely use air conditioners to adjust the temperature of the indoor environment in life so as to meet the cold and hot requirements of users. In the related art, for the refrigeration control of the fixed-frequency air conditioner, a method of stopping the air conditioner at a temperature is generally adopted, that is, in a refrigeration state of the air conditioner, when the room temperature is lower than the set temperature of the air conditioner and reaches a preset value, the compressor stops working, the air conditioner stops refrigerating, and when the room temperature is higher than the set temperature of the air conditioner and reaches the preset value, the compressor starts working, and the air conditioner continues refrigerating. The indoor ambient temperature is regulated by controlling the start and stop of the compressor. However, in practical use, when the air conditioner is controlled by a compressor start-stop method, the fluctuation of indoor temperature is large, the comfort of users is reduced due to sudden cooling and sudden heating of the environment, and meanwhile, the service life of the air conditioner is shortened due to frequent start-stop of the compressor, and the waste of power resources is caused.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a fixed-frequency air conditioning system with high practicability and improved indoor comfort.
In order to achieve the purpose, the scheme provided by the invention is as follows: a fixed-frequency air conditioning system for improving indoor comfort comprises a refrigerant circulation loop formed by connecting a compressor, an outdoor heat exchanger, a first indoor heat exchanger and a first capillary tube through pipelines, and further comprises a heat exchange branch connected with the outdoor heat exchanger in parallel, wherein the heat exchange branch comprises a first end communicated with a pipeline between the outdoor heat exchanger and the compressor and a second end communicated with a pipeline between the outdoor heat exchanger and the first indoor heat exchanger, and an electronic expansion valve and a second indoor heat exchanger are sequentially connected in series with the heat exchange branch along the direction from the first end to the second end of the heat exchange branch; the first indoor heat exchanger and the second indoor heat exchanger are sequentially arranged on the same air supply pipeline along the air supply direction; the constant-frequency air conditioning system further comprises a temperature sensor and a controller, wherein the temperature sensor is used for detecting the indoor environment temperature, and after the constant-frequency air conditioning system enters the refrigeration mode, the controller adjusts the opening degree of the electronic expansion valve based on the indoor temperature Ta acquired by the temperature sensor.
Further, after the fixed-frequency air conditioning system enters the cooling mode, the controller adjusts the electronic expansion valve to a preset initial opening degree, then adjusts the opening degree of the electronic expansion valve based on the comparison between the indoor temperature Ta collected by the temperature sensor and a preset target temperature Tb, wherein Δ T is Ta-Tb, when Δ T is greater than or equal to a first preset value a and less than a second preset value b, the controller controls the electronic expansion valve to increase a preset amplitude on the basis of the initial opening degree, when Δ T is greater than or equal to the second preset value b and less than a third preset value c, the electronic expansion valve maintains the initial opening degree, when Δ T is greater than or equal to a third preset value c and less than a fourth preset value d, the controller controls the electronic expansion valve to decrease the preset amplitude on the basis of the initial opening degree, when Δ T is greater than or equal to the fourth preset value d, and the controller controls the electronic expansion valve to reduce two preset amplitudes on the basis of the initial opening degree.
Further, the preset initial opening degree of the electronic expansion valve is 160P.
Further, one of the preset amplitudes is 8P.
Further, the first preset value a is-2 ℃, the second preset value b is 0 ℃, the third preset value c is 1 ℃ and the fourth preset value d is 5 ℃.
Further, when the constant-frequency air conditioning system is in a shutdown state or in other non-refrigeration operation modes and when the delta T is larger than a second preset value b, the constant-frequency air conditioning system enters a refrigeration mode.
Further, when the constant-frequency air conditioning system is in a cooling mode and the delta T is smaller than a first preset value a, the constant-frequency air conditioning system stops running.
Further, the temperature sensor is arranged at an air return opening of the air supply pipeline.
Further, the second end of the heat exchange branch is communicated with a pipeline between the first capillary tube and the first indoor heat exchanger so as to be connected with the first capillary tube in parallel; and the heat exchange branch is also provided with a second capillary tube and a first electromagnetic valve for controlling the on-off of the heat exchange branch, wherein the first electromagnetic valve, the electronic expansion valve, the second indoor heat exchanger and the second capillary tube are sequentially connected in series along the direction from the first end to the second end of the heat exchange branch.
The heat exchanger further comprises a second electromagnetic valve, a one-way valve and a four-way valve, wherein the four-way valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with an outlet of the compressor, the second valve port is respectively communicated with an outdoor heat exchanger and a first end of a heat exchange branch, the third valve port is communicated with an inlet of the compressor, and the fourth valve port is communicated with the first indoor heat exchanger; one end of the second electromagnetic valve is communicated with a pipeline between the electronic expansion valve and the second indoor heat exchanger, and the other end of the second electromagnetic valve is communicated with a pipeline between the first capillary tube and the first indoor heat exchanger; the outlet end of the one-way valve is communicated between the second indoor heat exchanger and the second capillary tube, and the inlet end of the one-way valve is communicated with the fourth valve port; when the fixed-frequency air conditioning system enters a heating mode, the second electromagnetic valve is opened, and the first electromagnetic valve is closed.
Compared with the prior art, the invention has the advantages that the second indoor heat exchanger is additionally arranged, so that the first indoor heat exchanger performs refrigerating operation and the second indoor heat exchanger performs heating operation when the fixed-frequency air-conditioning system is in a refrigerating mode, the heating quantity of the second indoor heat exchanger can be adjusted through the opening degree of the electronic expansion valve, the air outlet temperature of the air supply pipeline is adjusted, and further the indoor temperature is adjusted.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The system comprises a compressor 1, an outdoor heat exchanger 2, a first indoor heat exchanger 3, a second indoor heat exchanger 4, a first capillary tube 5, a second capillary tube 6, an electronic expansion valve 7, a first electromagnetic valve 8, a second electromagnetic valve 9 and a four-way valve 10.
Detailed Description
The invention will be further illustrated with reference to specific examples:
referring to fig. 1, the present embodiment is a fixed frequency air conditioning system for improving indoor comfort, which includes a refrigerant circulation loop formed by a compressor 1, a four-way valve 10, an outdoor heat exchanger 2, a first capillary tube 5 and a first indoor heat exchanger 3, specifically, the four-way valve 10 is a conventional reversing valve body in the art, the first valve port is communicated with an exhaust port of the compressor 1 through a pipeline, the second valve port is communicated with a first port of the outdoor heat exchanger 2 through a pipeline, the third valve port is communicated with a return air port of the compressor 1 through a pipeline, the fourth valve port is communicated with a second port of the first indoor heat exchanger 3 through a pipeline, the second port of the outdoor heat exchanger 2 is communicated with the first port of the first indoor heat exchanger 3 through a pipeline, and the pipeline is provided with a first capillary tube 5; the refrigerant circulation loop structure is a conventional structure in the field, and the switching of the flow direction of the refrigerant in the refrigerant circulation loop is realized through the reversing function of the four-way valve 10 so as to realize the switching of the heating mode and the refrigerating mode of the air conditioning system.
In this embodiment, the heat exchanger further comprises a heat exchange branch connected in parallel with the outdoor heat exchanger 2 and the first capillary tube 5, the heat exchange branch has a first end for refrigerant to flow in and a second end for refrigerant to flow out, wherein the heat exchange branch is sequentially provided with a first solenoid valve 8, an electronic expansion valve 7, a second indoor heat exchanger 4 and a second capillary tube 6 in series along a direction from the first end to the second end, the first end of the heat exchange branch is communicated with a pipeline between the outdoor heat exchanger 2 and the compressor 1, and the second end is communicated with a pipeline between the first capillary tube 5 and the first indoor heat exchanger 3; the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are sequentially arranged on the same air supply pipeline along the air supply direction; the controller is respectively electrically connected with the temperature sensor and the electronic expansion valve 7, and when the fixed-frequency air conditioning system enters a refrigeration mode, the controller adjusts the opening degree of the electronic expansion valve 7 based on the indoor temperature Ta acquired by the temperature sensor;
specifically, the controller adjusts the opening degree of the electronic expansion valve 7 based on the comparison between the indoor temperature Ta collected by the temperature sensor and a preset target temperature Tb, where Δ T is Ta-Tb, when the fixed-frequency air conditioning system is in a shutdown state or other non-refrigeration operation mode, when Δ T is greater than a second preset value b (the second preset value b is 0 ℃), the fixed-frequency air conditioning system enters the refrigeration mode, after the fixed-frequency air conditioning system enters the refrigeration mode, the controller adjusts the electronic expansion valve 7 to a preset initial opening degree (the initial opening degree is 160P), then when Δ T is greater than or equal to a first preset value a (the first preset value a is-2 ℃) and less than a second preset value b (the second preset value b is 0 ℃), the controller controls the electronic expansion valve 7 to increase a preset amplitude based on the initial opening degree, the preset amplitude is 8P, that is, at this time, the opening degree of the electronic expansion valve 7 is 168p, when Δ T is greater than or equal to the second preset value b and less than the third preset value c (the third preset value c is 1 ℃), the electronic expansion valve 7 maintains an initial opening degree, that is, the opening degree of the electronic expansion valve 7 is 160p, when Δ T is greater than or equal to the third preset value c and less than the fourth preset value d (the fourth preset value d is 5 ℃), the controller controls the electronic expansion valve 7 to decrease by one preset margin on the basis of the initial opening degree, that is, the opening degree of the electronic expansion valve 7 is 152p, when Δ T is greater than or equal to the fourth preset value d, the controller controls the electronic expansion valve 7 to decrease by two preset margins on the basis of the initial opening degree, that is, the opening degree of the electronic expansion valve 7 is 176p, and when Δ T is less than the first preset value a, the fixed; because the traditional fixed-frequency air conditioning system is in the refrigeration mode, the condition that the indoor temperature Ta is lower than the target temperature Tb often occurs, the compressor 1 is required to be frequently stopped to adjust the temperature, further the fluctuation of the indoor environment temperature is large, the comfort of a human body is greatly influenced, and the second indoor heat exchanger 4 is additionally arranged, so that when the fixed-frequency air conditioning system is in the refrigeration mode, the first indoor heat exchanger 3 performs the refrigeration operation, the second indoor heat exchanger 4 performs the heating operation, the heating quantity of the second indoor heat exchanger 4 can be adjusted through the opening degree of the electronic expansion valve 7, the outlet air temperature of the air supply pipeline is adjusted, further the adjustment of the indoor temperature is realized, namely, the adjustment of the indoor temperature can be realized through adjusting the opening degree of the electronic expansion valve 7, the temperature fluctuation of the indoor environment is effectively reduced, and the comfort of the human body is improved, and when the fixed-frequency air conditioning system is in a refrigeration mode, the compressor 1 does not need to be switched on and off frequently to adjust the indoor temperature, so that the energy is saved, the performance and the service life of the compressor 1 are facilitated, and the reliability is higher.
In this embodiment, the system further comprises a second electromagnetic valve 9 and a one-way valve, wherein one end of the second electromagnetic valve 9 is communicated with a pipeline between the electronic expansion valve 7 and the second indoor heat exchanger 4, and the other end is communicated with a pipeline between the first capillary tube 5 and the first indoor heat exchanger 3; the outlet end of the one-way valve is communicated between the second indoor heat exchanger 4 and the second capillary tube 6, and the inlet end of the one-way valve is communicated with the fourth valve port; when the fixed-frequency air conditioning system enters a heating mode, the second electromagnetic valve 9 is opened, the first electromagnetic valve 8 is closed, the high-temperature refrigerant discharged from the compressor 1 is divided into three parts through the four-way valve 10, a part of the refrigerant directly flows through the first indoor heat exchanger 3 for heat exchange, a part of the refrigerant flows through the second indoor heat exchanger 4 through the one-way valve for heat exchange and then is merged with the refrigerant flowing through the first indoor heat exchanger 3 through the second electromagnetic valve 9, a small part of the refrigerant flows through the second capillary tube 6 through the one-way valve and then is merged with the two parts of the refrigerant, and finally the three parts of the refrigerant are merged and then flow into the outdoor heat exchanger 2 through the first capillary tube 5; in the heating mode of the fixed-frequency air conditioning system, the indoor temperature Ta is rarely higher than the target temperature Tb, and therefore the outlet air temperature does not need to be adjusted by adjusting the opening degree of the electronic expansion valve 7.
In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The utility model provides an improve indoor comfort's fixed frequency air conditioning system, includes the refrigerant circulation circuit who constitutes through the tube coupling by compressor (1), outdoor heat exchanger (2), first indoor heat exchanger (3) and first capillary (5), its characterized in that: the heat exchanger is characterized by further comprising a heat exchange branch which is connected with the outdoor heat exchanger (2) in parallel, wherein the heat exchange branch comprises a first end which is communicated with a pipeline between the outdoor heat exchanger (2) and the compressor (1) and a second end which is communicated with a pipeline between the outdoor heat exchanger (2) and the first indoor heat exchanger (3), and an electronic expansion valve (7) and a second indoor heat exchanger (4) are sequentially connected with the heat exchange branch in series along the direction from the first end to the second end of the heat exchange branch; the first indoor heat exchanger (3) and the second indoor heat exchanger (4) are sequentially arranged on the same air supply pipeline along the air supply direction; the constant-frequency air conditioning system is characterized by further comprising a temperature sensor and a controller, wherein the temperature sensor is used for detecting the indoor environment temperature, and after the constant-frequency air conditioning system enters a refrigeration mode, the controller adjusts the opening degree of the electronic expansion valve (7) based on the indoor temperature Ta collected by the temperature sensor.
2. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 1, wherein: when the fixed-frequency air conditioning system enters a refrigeration mode, the controller adjusts the electronic expansion valve (7) to a preset initial opening degree, then the opening degree of the electronic expansion valve (7) is adjusted based on the comparison between the indoor temperature Ta collected by the temperature sensor and a preset target temperature Tb, wherein, when the delta T is greater than or equal to a first preset value a and less than a second preset value b, the controller controls the electronic expansion valve (7) to increase a preset amplitude on the basis of the initial opening degree, when the delta T is greater than or equal to the second preset value b and less than a third preset value c, the electronic expansion valve (7) keeps the initial opening degree, when the delta T is greater than or equal to the third preset value c and less than a fourth preset value d, the controller controls the electronic expansion valve (7) to decrease the preset amplitude on the basis of the initial opening degree, and when the delta T is larger than or equal to a fourth preset value d, the controller controls the electronic expansion valve (7) to reduce two preset amplitudes on the basis of the initial opening degree.
3. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 2, wherein: the preset initial opening degree of the electronic expansion valve (7) is 160P.
4. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 2, wherein: one of the preset amplitudes is 8P.
5. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 2, wherein: the first preset value a is-2 ℃, the second preset value b is 0 ℃, the third preset value c is 1 ℃ and the fourth preset value d is 5 ℃.
6. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 2, wherein: and when the constant-frequency air conditioning system is in a shutdown state or other non-refrigeration operation modes and the delta T is larger than a second preset value b, the constant-frequency air conditioning system enters a refrigeration mode.
7. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 2, wherein: and when the constant-frequency air conditioning system is in a refrigeration mode and the delta T is smaller than a first preset value a, the constant-frequency air conditioning system stops running.
8. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 1, wherein: the temperature sensor is arranged at an air return opening of the air supply pipeline.
9. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 1, wherein: the second end of the heat exchange branch is communicated with a pipeline between the first capillary tube (5) and the first indoor heat exchanger (3) so as to be connected with the first capillary tube (5) in parallel; and the heat exchange branch is also provided with a second capillary tube (6) and a first electromagnetic valve (8) for controlling the on-off of the heat exchange branch, wherein the first electromagnetic valve (8), the electronic expansion valve (7), the second indoor heat exchanger (4) and the second capillary tube (6) are sequentially connected in series along the direction from the first end to the second end of the heat exchange branch.
10. A constant frequency air conditioning system for enhancing indoor comfort as set forth in claim 9, wherein: the heat exchanger is characterized by further comprising a second electromagnetic valve (9), a one-way valve and a four-way valve (10), wherein the four-way valve (10) comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with an outlet of the compressor (1), the second valve port is respectively communicated with an outdoor heat exchanger (2) and a first end of a heat exchange branch, the third valve port is communicated with an inlet of the compressor (1), and the fourth valve port is communicated with the first indoor heat exchanger (3); one end of the second electromagnetic valve (9) is communicated with a pipeline between the electronic expansion valve (7) and the second indoor heat exchanger (4), and the other end of the second electromagnetic valve is communicated with a pipeline between the first capillary tube (5) and the first indoor heat exchanger (3); the outlet end of the one-way valve is communicated between the second indoor heat exchanger (4) and the second capillary tube (6), and the inlet end of the one-way valve is communicated with the fourth valve port; when the fixed-frequency air conditioning system enters a heating mode, the second electromagnetic valve (9) is opened, and the first electromagnetic valve (8) is closed.
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| CN201911070902.1A CN110822544A (en) | 2019-11-05 | 2019-11-05 | Fixed-frequency air conditioning system for improving indoor comfort |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609586A (en) * | 2020-04-24 | 2020-09-01 | 珠海格力电器股份有限公司 | Double-temperature air conditioning system, control method and air conditioner |
| CN112128850A (en) * | 2020-09-07 | 2020-12-25 | 青岛海尔空调器有限总公司 | Air conditioner with double-chamber internal heat exchanger |
| CN113465219A (en) * | 2021-07-06 | 2021-10-01 | 珠海格力电器股份有限公司 | Refrigerating system and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642873A (en) * | 2017-10-31 | 2018-01-30 | 海信（山东）空调有限公司 | Electronic expansion valve opening control method when a kind of air-conditioning and its startup |
| CN107676939A (en) * | 2017-10-27 | 2018-02-09 | 广东志高暖通设备股份有限公司 | A kind of control method of fixed frequency air conditioner, control system and control device |
| CN108731224A (en) * | 2018-08-31 | 2018-11-02 | 广东美的制冷设备有限公司 | Control method, device, equipment and the fixed frequency air conditioner system of fixed frequency air conditioner system |
| CN110056997A (en) * | 2019-04-04 | 2019-07-26 | 广东志高暖通设备股份有限公司 | A kind of air-conditioning system with humidification function |
| JP2019178805A (en) * | 2018-03-30 | 2019-10-17 | 日本ピーマック株式会社 | Air conditioner, air conditioning system and air conditioning facility |
-
2019
- 2019-11-05 CN CN201911070902.1A patent/CN110822544A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676939A (en) * | 2017-10-27 | 2018-02-09 | 广东志高暖通设备股份有限公司 | A kind of control method of fixed frequency air conditioner, control system and control device |
| CN107642873A (en) * | 2017-10-31 | 2018-01-30 | 海信（山东）空调有限公司 | Electronic expansion valve opening control method when a kind of air-conditioning and its startup |
| JP2019178805A (en) * | 2018-03-30 | 2019-10-17 | 日本ピーマック株式会社 | Air conditioner, air conditioning system and air conditioning facility |
| CN108731224A (en) * | 2018-08-31 | 2018-11-02 | 广东美的制冷设备有限公司 | Control method, device, equipment and the fixed frequency air conditioner system of fixed frequency air conditioner system |
| CN110056997A (en) * | 2019-04-04 | 2019-07-26 | 广东志高暖通设备股份有限公司 | A kind of air-conditioning system with humidification function |
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| CN111609586A (en) * | 2020-04-24 | 2020-09-01 | 珠海格力电器股份有限公司 | Double-temperature air conditioning system, control method and air conditioner |
| CN112128850A (en) * | 2020-09-07 | 2020-12-25 | 青岛海尔空调器有限总公司 | Air conditioner with double-chamber internal heat exchanger |
| CN113465219A (en) * | 2021-07-06 | 2021-10-01 | 珠海格力电器股份有限公司 | Refrigerating system and control method |
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