CN113983579B - Control method of air conditioning unit - Google Patents

Control method of air conditioning unit Download PDF

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Publication number
CN113983579B
CN113983579B CN202111263151.2A CN202111263151A CN113983579B CN 113983579 B CN113983579 B CN 113983579B CN 202111263151 A CN202111263151 A CN 202111263151A CN 113983579 B CN113983579 B CN 113983579B
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China
Prior art keywords
air conditioning
temperature
conditioning unit
difference
outdoor
Prior art date
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Application number
CN202111263151.2A
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Chinese (zh)
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CN113983579A (en
Inventor
张晓迪
王彦灵
王河坡
高强
许磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Priority to CN202111263151.2A priority Critical patent/CN113983579B/en
Publication of CN113983579A publication Critical patent/CN113983579A/en
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Publication of CN113983579B publication Critical patent/CN113983579B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D13/00—Electric heating systems
    • F24D13/04—Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/04—Other domestic- or space-heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—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
    • 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
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • 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
    • 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
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • 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
    • 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
    • F24F2110/12—Temperature of the outside air
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/40—Geothermal heat-pumps
    • 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]
    • Y02B30/54—Free-cooling systems
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner unit, and aims to solve the problems that the existing air conditioner unit is easy to generate refrigerant noise and energy loss due to oil return. For this purpose, the air conditioning unit of the invention comprises a refrigerant circulation loop, a refrigerant heat exchange branch and a floor heating circulation loop, and the circulation of different loops is controlled by controlling the communication state of a first reversing valve and a second reversing valve so as to control the communication state of an indoor coil of the air conditioning unit, and based on the communication state, if the acquired mode setting instruction is to operate an air conditioning heating mode, the air conditioning unit is controlled to operate the air conditioning heating mode and the floor heating mode simultaneously; if the mode setting instruction is not acquired, controlling the air conditioning unit to operate a floor heating mode; according to the invention, the heating operation mode of the air conditioning unit is regulated, so that the oil return frequency of the air conditioning unit is effectively reduced, the service life of the compressor is further effectively ensured, and the refrigerant noise and energy loss of the air conditioning unit are effectively reduced.

Description

Control method of air conditioning unit
Technical Field
The invention relates to the technical field of air conditioner control, and particularly provides a control method of an air conditioner unit.
Background
The conventional air conditioning unit generally needs to return oil periodically so as to make the compressor oil remained in the refrigerant circulation loop participate in the circulation again along with the flow of the refrigerant, thereby ensuring the service life of the compressor of the air conditioning unit. However, when the air conditioning unit returns oil, the refrigerant is usually bypassed improperly, so that refrigerant noise and energy loss are generated, and the use experience of a user is further affected.
Accordingly, there is a need in the art for a new control method of an air conditioning unit to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the technical problems, namely the problems that the existing air conditioning unit is easy to generate refrigerant noise and energy loss due to oil return.
The invention provides a control method of an air conditioning unit, the air conditioning unit comprises a refrigerant circulation loop, a refrigerant heat exchange branch and a ground heating circulation loop, an indoor coil, a first reversing valve, a compressor, a second reversing valve, an outdoor coil and a first throttling component are arranged on the refrigerant circulation loop, one end of the refrigerant heat exchange branch is connected with the second reversing valve, the other end of the refrigerant heat exchange branch is connected between the indoor coil and the outdoor coil, a heat exchange unit is arranged on the refrigerant heat exchange branch, the heat exchange unit is arranged to enable the refrigerant heat exchange branch and the ground heating circulation loop to exchange heat through the heat exchange unit, the first reversing valve is arranged to enable the indoor coil to be connected with an air inlet of the compressor or enable an air outlet of the compressor to be connected with the indoor coil, the second reversing valve is arranged to be selectively opened in a first communication state or a second communication state, the first communication state is arranged to enable the refrigerant heat exchange branch to be connected with the air inlet of the compressor and the air outlet of the compressor to be connected with the air inlet of the compressor, and the air outlet of the compressor is connected with the air inlet of the outdoor coil to be connected with the refrigerant control method, and the control method comprises: before the air conditioning unit runs a heating working condition, a mode setting instruction of a control terminal is obtained; if the acquired mode setting instruction is to operate an air conditioning heating mode, controlling the air conditioning unit to simultaneously operate the air conditioning heating mode and the floor heating mode; and if the mode setting instruction is not acquired, controlling the air conditioning unit to operate a floor heating mode.
In a preferred technical solution of the above control method, the control method further includes: in the process that the air conditioning unit simultaneously operates an air conditioning heating mode and a floor heating mode, acquiring indoor temperature, outdoor temperature, target temperature and outlet water temperature of the air conditioning unit; and selectively adjusting the operation mode of the air conditioning unit according to the indoor temperature, the outdoor temperature, the target temperature and the outlet water temperature.
In the preferred technical solution of the above control method, the step of selectively adjusting the operation mode of the air conditioning unit according to the indoor temperature, the outdoor temperature, the target temperature, and the outlet water temperature specifically includes: calculating a difference between the target temperature and the indoor temperature; calculating a difference between the outlet water temperature and the outdoor temperature; and selectively adjusting the operation mode of the air conditioning unit according to the difference value between the target temperature and the indoor temperature and the difference value between the outlet water temperature and the outdoor temperature.
In the above preferred technical solution of the control method, the step of selectively adjusting the operation mode of the air conditioning unit according to the difference between the target temperature and the indoor temperature and the difference between the outlet temperature and the outdoor temperature includes: and if the difference value between the target temperature and the indoor temperature is smaller than a first preset difference value and/or the difference value between the outlet water temperature and the outdoor temperature is larger than a second preset difference value, controlling the air conditioning unit to only operate the floor heating mode.
In the above preferred technical solution of the control method, the step of selectively adjusting the operation mode of the air conditioning unit according to the difference between the target temperature and the indoor temperature and the difference between the outlet temperature and the outdoor temperature further includes: and if the difference between the target temperature and the indoor temperature is greater than or equal to the first preset difference and the difference between the outlet water temperature and the outdoor temperature is less than or equal to the second preset difference, not adjusting the operation mode of the air conditioning unit.
In a preferred embodiment of the above control method, after the step of "not adjusting the operation mode of the air conditioning unit", the control method further includes: acquiring the indoor temperature, the outdoor temperature and the target temperature and the outlet water temperature of the air conditioning unit again after a preset time period; and selectively adjusting the operation mode of the air conditioning unit according to the re-acquired indoor temperature, the re-acquired outdoor temperature, the target temperature and the outlet water temperature.
In the above preferred technical solution of the control method, the step of selectively adjusting the operation mode of the air conditioning unit according to the re-acquired indoor temperature, outdoor temperature, target temperature and outlet water temperature specifically includes: calculating a difference between the re-acquired target temperature and the indoor temperature; calculating the difference value between the re-acquired water outlet temperature and the outdoor temperature; and selectively adjusting the operation mode of the air conditioning unit according to the difference value between the re-acquired target temperature and the indoor temperature and the difference value between the re-acquired outlet water temperature and the outdoor temperature.
In the above preferred technical solution of the control method, the step of selectively adjusting the operation mode of the air conditioning unit according to the difference between the target temperature and the indoor temperature acquired again and the difference between the outlet water temperature and the outdoor temperature acquired again specifically includes: and if the difference value between the re-acquired target temperature and the indoor temperature is smaller than a third preset difference value and/or the difference value between the re-acquired outlet water temperature and the outdoor temperature is larger than a fourth preset difference value, controlling the air conditioning unit to only operate a floor heating mode.
In a preferred technical scheme of the control method, the first preset value is 6 ℃; and/or the second preset value is 14 ℃.
In a preferred embodiment of the above control method, the preset time period is 30 minutes.
Under the condition of adopting the technical scheme, the control method of the invention only operates the air conditioning heating mode when the mode setting instruction for operating the air conditioning heating mode is acquired, otherwise only operates the floor heating mode, and can operate the floor heating mode in a linkage manner even when the air conditioning heating mode is operated, and the oil return problem is completely avoided when the air conditioning unit operates the floor heating mode; based on the structure setting of above-mentioned air conditioning unit, the rethread is adjusted air conditioning unit's heats the running mode to effectively reduce air conditioning unit's oil return frequency, and then can be in effectively guaranteeing when compressor life can also effectively reduce air conditioning unit's refrigerant noise and energy loss promote user's use experience and feel.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the overall structure of an air conditioning unit according to the present invention in a cooling mode or a dehumidifying mode;
FIG. 2 is a schematic view of the overall structure of the air conditioning unit of the present invention in a floor heating mode;
FIG. 3 is a flow chart of the main steps of the control method of the present invention;
FIG. 4 is a flowchart of the specific steps of a preferred embodiment of the control method of the present invention;
reference numerals:
1. an indoor coil; 110. an electronic expansion valve; 2. a three-way valve; 3. a compressor; 4. a four-way valve; 5. an outdoor coil; 51. a first outdoor coil; 52. a second outdoor coil; 6. a first throttle member; 7. an economizer; 8. a refrigerant radiator; 9. a high-pressure liquid storage tank; 10. a liquid pipe stop valve; 11. an air pipe stop valve; 12. a filter; 13. an oil separator; 14. a gas-liquid separator; 15. a heat exchange unit; 16. a second throttle member; 17. a floor heating coil; 18. a fan coil; 19. a water pump; 20. a water outlet; 21. an expansion tank; 22. an electric heating device.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can adapt it as desired to suit a particular application. For example, the invention does not limit the specific model of the air conditioning unit, and a technician can set the specific application object of the air conditioning unit according to the actual use requirement. Such changes as to the application object do not deviate from the basic principle of the invention and fall within the protection scope of the invention.
It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", and the like, refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, in the description of the preferred embodiments, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically connected, electrically connected, directly connected, indirectly connected through intermediaries, or internally connected between two elements, and therefore should not be construed as limiting the invention. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Furthermore, it should be noted that in the description of the present invention, although the respective steps of the control method of the present invention are described in a specific order in the present application, these orders are not limitative, but a person skilled in the art may perform the steps in a different order without departing from the basic principle of the present invention.
Specifically, referring to fig. 1 and 2, fig. 1 is a schematic overall structure of the air conditioning unit according to the present invention when the air conditioning unit is in a cooling mode or a dehumidifying mode, and fig. 2 is a schematic overall structure of the air conditioning unit according to the present invention when the air conditioning unit is in a heating mode. As shown in fig. 1 and 2, the air conditioning unit includes a refrigerant circulation loop, a refrigerant heat exchange branch and a ground heating circulation loop, where an indoor coil 1, a first reversing valve, a compressor 3, a second reversing valve, an outdoor coil 5 and a first throttling member 6 are disposed on the refrigerant circulation loop, as a preferred setting manner, the first reversing valve is a three-way valve 2, and the second reversing valve is a four-way valve 4, which is not limitative, and the system of the air conditioning unit can also achieve the purpose of reversing through a plurality of one-way valves, so that a technician can set the system according to practical situations.
In the present preferred embodiment, the three-way valve 2 is configured to selectively connect the indoor coil 1 to the inlet of the compressor 3 or connect the outlet of the compressor 3 to the indoor coil 1, and the four-way valve 4 is configured to selectively open in a first communication state configured to connect the refrigerant heat exchanging branch to the inlet of the compressor 3 and the outlet of the compressor 3 to the outdoor coil 5 or in a second communication state configured to connect the outdoor coil 5 to the inlet of the compressor 3 and the outlet of the compressor 3 to the refrigerant heat exchanging branch.
Specifically, the three-way valve 2 includes a first opening (an E port in the drawing), a second opening (an S port in the drawing), and a third opening (a D port in the drawing), and the three-way valve 2 is provided so as to be able to selectively communicate the E port with the S port or communicate the E port with the D port; wherein, the E mouth links to each other with indoor coil 1, and the S mouth links to each other with the air inlet of compressor 3, and the D mouth links to each other with the gas vent of compressor 3. The four-way valve 4 includes a first connection port (E 'port in the drawing), a second connection port (S' port in the drawing), a third connection port (D 'port in the drawing), and a fourth connection port (C' port in the drawing), the first connection state being set to enable communication between the E 'port and the S' port and communication between the D 'port and the C' port, and the second connection state being set to enable communication between the E 'port and the D' port and communication between the S 'port and the C' port; wherein, the E 'mouth links to each other with refrigerant heat transfer branch road, and the S' mouth links to each other with the air inlet of compressor 3, and the D 'mouth links to each other with the gas vent of compressor 3, and the C' mouth links to each other with outdoor coil 5.
Based on the concrete connected mode of three-way valve 2 and cross valve 4, can effectively solve air conditioning unit's refrigerant flow noise problem and energy consumption problem, make air conditioning unit can not with warm up the circulation circuit in refrigeration process and carry out heat transfer, warm up the heating in-process and cut off indoor coil 1 to make the refrigerant not pass through indoor coil 1 in the circulation process, and then avoid producing unnecessary refrigerant flow noise and energy consumption, promote user's use experience.
Preferably, the economizer 7 is disposed on the refrigerant circulation circuit, the economizer 7 is disposed between the indoor coil 1 and the outdoor coil 5, in addition, the refrigerant radiator 8 is disposed on the refrigerant circulation circuit, the refrigerant radiator 8 is disposed between the outdoor coil 5 and the economizer 7, the first throttling member 6 is disposed between the outdoor coil 5 and the refrigerant radiator 8, in addition, the outdoor coil 5 includes a first outdoor coil 51 and a second outdoor coil 52, and the first outdoor coil 51 and the second outdoor coil 52 are disposed in parallel. As a preferred arrangement, the first outdoor coil 51 and the left second outdoor coil 52 are arranged in parallel, and the first throttle member 6 is arranged downstream of the first outdoor coil 51 and the left second outdoor coil 52 in the direction of flow of the refrigerant shown in fig. 1, and the refrigerant passes through the first outdoor coil 51 and the left second outdoor coil 52, passes through the first throttle member 6, passes through the right portion of the second outdoor coil 52, and flows into the refrigerant radiator 8. Based on the common arrangement of the outdoor coil 5, the first throttling component 6, the refrigerant radiator 8 and the economizer 7, the refrigerant can be fully converted, and the working efficiency of the air conditioning unit is improved.
Further, in the preferred embodiment, the refrigerant circulation circuit is further provided with a high-pressure liquid storage tank 9, and the high-pressure liquid storage tank 9 is disposed between the indoor coil 1 and the economizer 7. The refrigerant circulation loop is also provided with a liquid pipe stop valve 10 and a gas pipe stop valve 11, the liquid pipe stop valve 10 is arranged between the indoor coil pipe 1 and the high-pressure liquid storage tank 9, and the gas pipe stop valve 11 is arranged between the indoor coil pipe 1 and the three-way valve 2. The refrigerant circulation loop is also provided with a plurality of filters 12 to prevent ice blockage. The refrigerant circulation circuit is provided with an oil separator 13 on the discharge port side of the compressor 3 and a gas-liquid separator 14 on the intake port side.
Specifically, in the preferred embodiment, the number of the indoor coils 1 is four, and the indoor coils 1 are arranged in parallel, and each indoor coil 1 is connected with an electronic expansion valve 110 in series to control the on-off state of the four indoor coils 1, and of course, the present invention is not limited to the specific number of the indoor coils 1, for example, the number of the indoor coils 1 may be one. In addition, it should be noted that the present invention does not limit the specific types of the indoor coil 1, the outdoor coil 5 and the first throttling member 6, and the specific types of the indoor coil 1 and the outdoor coil 5 may be plate heat exchangers, double pipe heat exchangers or fin heat exchangers; the first throttling component 6 can be an electronic expansion valve, a thermal expansion valve or a floating ball regulating valve, and can be set by a technician according to the actual requirement condition of the air conditioning unit.
With continued reference to fig. 1 and 2, the upper end of the refrigerant heat exchange branch is connected to the E' port of the four-way valve 4, and the lower end is connected between the indoor coil 1 and the outdoor coil 5, in this preferred embodiment, specifically between the high-pressure liquid storage tank 9 and the liquid pipe stop valve 10, and the refrigerant heat exchange branch is provided with a heat exchange unit 15, and the heat exchange unit 15 is configured so that the refrigerant heat exchange branch and the floor heating circulation loop exchange heat through the heat exchange unit 15. It should be noted that, the specific structure of the heat exchange unit 15 is not limited in the present invention, as long as the refrigerant heat exchange branch and the floor heating circulation loop can exchange heat through the heat exchange unit 15; for example, the heat exchange unit 15 may be a shell and tube heat exchanger, where the shell and tube heat exchanger includes two sets of heat exchange tubes disposed adjacently, and the refrigerant heat exchange branch and the ground heating circulation loop are respectively communicated with one set of heat exchange tubes to realize heat exchange.
In addition, the refrigerant heat exchange branch is further provided with a second throttling component 16, and the second throttling component 16 is preferably an electronic expansion valve, so that the communication state and the refrigerant flow of the refrigerant heat exchange branch can be controlled, the bypass state of the refrigerant heat exchange branch can be controlled more effectively, and unnecessary refrigerant flowing noise and energy loss can be avoided effectively. It should be noted that the present invention does not limit the specific type of the second throttling member 16, and a technician may set the second throttling member 16 according to the actual requirement, for example, the second throttling member 16 may be a thermal expansion valve or a floating ball adjusting valve.
The floor heating circulation loop is provided with a floor heating coil 17 and two fan coils 18, and the floor heating coil 17 and the two fan coils 18 are arranged in parallel, so that selective opening can be realized according to actual use requirements, and unnecessary energy consumption is avoided. The floor heating circulation loop is also provided with a water pump 19 and a water drain port 20, and the water pump 19 and the water drain port 20 are respectively arranged on two sides of the fan coil 18. It should be noted that, the specific structure, number and connection relation of the floor heating coil 17 and the fan coil 18 are not limited in the present invention, and the technician can set the floor heating coil according to the actual use requirement. Further, an expansion tank 21 and an electric heating device 22 are further arranged on the ground heating circulation loop, and the expansion tank 21 is arranged between the heat exchange unit 15 and the water pump 19 so as to balance the water pressure in the ground heating circulation loop; an electric heating device 22 is provided between the heat exchange unit 15 and the water discharge port 20 to heat water in the floor heating circulation loop when necessary.
Based on the air conditioning unit structure described in the preferred embodiment, as shown in fig. 1, when the air conditioning unit is in an air conditioning refrigeration mode or an air conditioning dehumidification mode, the circulation sequence of the refrigerant is as follows: the air outlet of the compressor 3- > the oil separator 13- > the four-way valve 4 (in the first communication state) > the outdoor coil 5- > the first throttling member 6- > the refrigerant radiator 8- > the economizer 7- > the liquid pipe shut-off valve 10- > the electronic expansion valve 110- > the indoor coil 1- > the air pipe shut-off valve 11- > the three-way valve 2 (the port E and the port S are in communication) →the gas-liquid separator 14- > the air inlet of the compressor 3, and in this mode, closing the second throttling member 16 can intercept the refrigerant heat exchange branch, and can avoid the refrigerant bypass in the heat exchange unit 15. Of course, if the user needs to use the fan coil 18 to perform refrigeration, the fan coil 18 can enter and exit through the water inlet and the water outlet 20 of the water pump 19, at this time, the second throttling member 16 can be opened with a certain opening, and evaporate in the heat exchange unit 15 after throttling and depressurization are completed, so as to ensure that the fan coil 18 can exit cold water to complete the refrigeration process, and the refrigerant flows through the refrigerant heat exchange branch and enters the four-way valve 4 through the E 'port, and flows into the gas-liquid separator 14 through the S' port to reenter the refrigerant circulation.
Based on the air conditioning unit structure in the preferred embodiment, as shown in fig. 2, when the air conditioning unit is in the floor heating mode, the circulation sequence of the refrigerant is as follows: the compressor 3 comprises a discharge port, an oil separator 13, a four-way valve 4 (in the second communication state), a heat exchange unit 15, a second throttling component 16, an economizer 7, a refrigerant radiator 8, a first throttling component 6, an outdoor coil 5, the four-way valve 4, a gas-liquid separator 14 and an air inlet of the compressor 3. In this mode, the electronic expansion valve 110 is in a closed state, so as to effectively avoid the bypass state of the indoor coil 1 in the heating process of the air conditioning unit, thereby eliminating the refrigerant flowing noise generated by the indoor coil 1 and avoiding unnecessary energy loss. Of course, if the user requires the fan coil 18 to heat or the use of domestic hot water, the water may be discharged from the water discharge 20 as well. In addition, if the air conditioning unit is required to operate in the ground heating mode, the E port and the D port of the three-way valve 2 are communicated, so that the high-temperature and high-pressure refrigerant gas sprayed out from the air outlet of the compressor 3 can pass through the indoor coil 1 and the heat exchange unit 15 at the same time, and the high-temperature and high-pressure refrigerant gas is condensed and released into liquid refrigerant in the indoor coil 1 and the heat exchange unit 15 respectively, and then is converged and flows through the outdoor coil 5 to complete evaporation, and then returns to the compressor 3.
Referring next to fig. 3, fig. 3 is a flow chart of main steps of the control method of the present invention. As shown in fig. 3, based on the air conditioning unit described in the above embodiment, the control method of the present invention includes the following steps:
s1: before an air conditioning unit runs a heating working condition, a mode setting instruction of a control terminal is obtained;
s2: if the acquired mode setting instruction is to operate the air conditioner heating mode, controlling the air conditioner unit to simultaneously operate the air conditioner heating mode and the floor heating mode;
s3: and if the mode setting instruction is not acquired, controlling the air conditioning unit to operate the floor heating mode.
In step S1, a mode setting instruction of a control terminal is acquired before the air conditioning unit operates a heating condition. It should be noted that the present invention does not limit the type of the control terminal, and the control terminal may be the original control panel of the air conditioning unit, or may be separately provided for executing the control method of the present invention, for example, the control terminal may be a mobile phone that is in communication connection with the air conditioning unit, or may be an original control panel of the air conditioning unit, and a technician may set the control terminal according to the actual use requirement.
In steps S2 and S3, if the acquired mode setting instruction is to operate the air conditioning heating mode, controlling the air conditioning unit to operate the air conditioning heating mode, and simultaneously operating the floor heating mode in a linkage manner, that is, controlling the electronic expansion valve 110 and the second throttling member 16 to be opened simultaneously; if the mode setting instruction is not acquired, the air conditioning unit is controlled to only operate the floor heating mode, that is, the second throttling member 16 is controlled to be opened, and the electronic expansion valve 110 is controlled to be closed. It should be noted that the invention does not limit the type of the acquired mode setting instruction, and the mode setting instruction can be text information, voice information, picture information, and a technician can set the mode setting instruction according to the actual use requirement.
Referring next to fig. 4, fig. 4 is a flowchart showing the specific steps of a preferred embodiment of the control method of the present invention. As shown in fig. 4, based on the air conditioning unit described in the above embodiment, the control method of the preferred embodiment of the present invention includes the steps of:
s101: before an air conditioning unit runs a heating working condition, a mode setting instruction of a control terminal is obtained;
s102: if the acquired mode setting instruction is to operate the air conditioner heating mode, controlling the air conditioner unit to simultaneously operate the air conditioner heating mode and the floor heating mode;
s103: if the mode setting instruction is not acquired, controlling the air conditioning unit to operate a floor heating mode;
s104: acquiring the indoor temperature, the outdoor temperature and the target temperature and the outlet water temperature of an air conditioning unit;
s105: calculating a difference between the target temperature and the indoor temperature, and recording the difference as a first difference;
s106: calculating a difference between the water temperature and the outdoor temperature, and recording the difference as a second difference;
s107: judging whether the first difference value is larger than or equal to a first preset difference value and whether the second difference value is smaller than or equal to a second preset difference value; if not, executing step S108; if yes, step S109 is executed;
s108: controlling an air conditioning unit to only operate a floor heating mode;
s109: the operation mode of the air conditioning unit is not regulated;
s110: acquiring the indoor temperature, the outdoor temperature and the target temperature and the outlet water temperature of the air conditioning unit again after a preset time period;
s111: calculating a difference value between the target temperature and the indoor temperature obtained again, and recording the difference value as a third difference value;
s112: calculating the difference between the re-acquired water outlet temperature and the outdoor temperature, and recording the calculated difference as a fourth difference;
s113: and if the third difference value is smaller than the third preset difference value and/or the fourth difference value is larger than the fourth preset difference value, controlling the air conditioning unit to only operate the floor heating mode.
In step S101, a mode setting instruction of a control terminal is acquired before the air conditioning unit operates a heating condition. It should be noted that the present invention does not limit the type of the control terminal, and the control terminal may be the original control panel of the air conditioning unit, or may be separately provided for executing the control method of the present invention, for example, the control terminal may be a mobile phone that is in communication connection with the air conditioning unit, or may be an original control panel of the air conditioning unit, and a technician may set the control terminal according to the actual use requirement.
Next, in step S102, if the acquired mode setting instruction is to operate the air conditioning heating mode, the air conditioning unit is controlled to operate the air conditioning heating mode, and simultaneously the floor heating mode is operated in a linkage manner, that is, the electronic expansion valve 110 and the second throttling member 16 are controlled to be opened simultaneously; in step S103, if the mode setting instruction is not acquired, the air conditioning unit is controlled to operate only the floor heating mode, that is, the second throttling member 16 is controlled to be opened, and the electronic expansion valve 110 is controlled to be closed. It should be noted that the invention does not limit the type of the acquired mode setting instruction, and the mode setting instruction can be text information, voice information, picture information, and a technician can set the mode setting instruction according to the actual use requirement.
Next, in step S104, during the process of simultaneously operating the air conditioning and heating modes of the air conditioning unit, an indoor temperature, an outdoor temperature, and a target temperature and a water outlet temperature of the air conditioning unit are obtained, where the water outlet temperature is the water outlet temperature at the water outlet 20, and the operation mode of the air conditioning unit is selectively adjusted according to the indoor temperature, the outdoor temperature, the target temperature, and the water outlet temperature. It should be noted that, the specific adjustment mode of the operation mode of the air conditioning unit is not limited, and the air conditioning unit may be adjusted according to the difference between different parameters of the indoor temperature, the outdoor temperature, the target temperature and the outlet water temperature, or may be adjusted according to the ratio, which is not limited. As a specific implementation mode, the operation mode of the air conditioning unit is adjusted according to the difference value among different parameters of the indoor temperature, the outdoor temperature, the target temperature and the outlet water temperature, so that the operation mode of the air conditioning unit can be rapidly judged, and further the refrigerant noise and energy loss caused by oil return are effectively reduced.
Specifically, in steps S105 to S109, a difference between the target temperature and the indoor temperature is calculated, and is noted as a first difference; calculating the difference between the outlet water temperature and the outdoor temperature, and recording the difference as a second difference; and selectively adjusting the operation mode of the air conditioning unit according to the first difference value and the second difference value. It should be noted that, the present invention does not limit the specific determination manner of adjusting the operation mode of the air conditioning unit according to the first difference and the second difference, and the specific determination manner may be that the first difference and the second difference are compared, or that the first difference and the second difference are respectively compared with other preset differences, which is not limitative; preferably, in this embodiment, the first difference value and the second difference value are compared with other preset difference values, so as to more accurately adjust the operation mode of the air conditioning unit, and further effectively reduce the oil return frequency of the air conditioning unit, so as to reduce the noise and energy loss of the refrigerant.
Preferably, judging whether the first difference is greater than or equal to a first preset difference and whether the second difference is less than or equal to a second preset difference; if not, controlling the air conditioning unit to only operate a floor heating mode; if so, the operation mode of the air conditioning unit is not regulated, namely, the air conditioning heating mode and the floor heating mode are continuously operated at the same time. It should be noted that, the specific values of the target temperature, the first preset difference value and the second preset difference value are not limited in the present invention, and the technician can set the values according to the actual heating requirements of the user. As a specific embodiment, the first preset difference in this example is 6 ℃, and the second preset difference is 14 ℃. Of course, if the target temperature set by the user is higher than a preset target temperature (self-contained in the air conditioning unit), that is, the user needs a higher heating requirement, the specific value of the first preset difference is correspondingly smaller than 6 ℃, and the specific value of the second preset difference is correspondingly larger than 14 ℃; if the target temperature set by the user is lower than the preset target temperature, that is, the user needs lower heating requirement, the specific value of the first preset difference value is correspondingly greater than 6 ℃, and the specific value of the second preset difference value is correspondingly smaller than 14 ℃.
Further, in step S110, after the operation mode of the air conditioning unit is not adjusted, that is, the air conditioning heating mode and the floor heating mode are continuously and simultaneously operated, the indoor temperature, the outdoor temperature, and the target temperature and the outlet water temperature of the air conditioning unit are acquired again after a preset period of time. It should be noted that, the present invention does not limit the specific duration of the preset duration, and as a preferred setting manner, the preset duration in this embodiment is 30 minutes, so as to enable the air conditioning unit to switch to an operation manner of only operating the floor heating mode in time, thereby effectively reducing the oil return frequency of the air conditioning unit; of course, the technician can set the specific duration of the preset duration according to the actual heating operation condition of the air conditioning unit.
Next, in steps S111 to S113, a difference between the target temperature and the indoor temperature acquired again is calculated and noted as a third difference; calculating the difference between the re-acquired water outlet temperature and the outdoor temperature, and recording the calculated difference as a fourth difference; and selectively adjusting the operation mode of the air conditioning unit according to the third difference value and the fourth difference value.
Specifically, if at least one of the conditions that the third difference value is smaller than a third preset difference value and the fourth difference value is larger than a fourth preset difference value is satisfied, the air conditioning unit is controlled to switch to an operation mode of only operating the floor heating mode. In addition, it should be noted that, the specific values of the third preset difference value and the fourth preset difference value are not limited in the present invention, and the technician can set the values according to the actual use requirements; as a preferable setting mode, the third preset difference value is larger than the first preset difference value, and the fourth preset difference value is smaller than the second preset difference value, so that the air conditioning unit can only operate the floor heating mode as soon as possible, oil return frequency of the air conditioning unit is reduced, and further refrigerant noise and energy loss are reduced.
In addition, as a preferable control mode, under the condition of the air conditioning unit operation heating working condition, once the air conditioning unit is switched to the condition of only operating the floor heating mode, the air conditioning heating mode is not operated any more until the air conditioning unit is restarted next time and the air conditioning heating mode can be operated under the condition that the operation condition is met, so that the oil return frequency of the air conditioning unit is further effectively reduced, the refrigerant noise and the energy loss of the air conditioning unit are further effectively reduced, and the use experience of a user is improved.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (6)

1. A control method of an air conditioning unit is characterized in that the air conditioning unit comprises a refrigerant circulation loop, a refrigerant heat exchange branch and a ground heating circulation loop,
the refrigerant circulation loop is provided with an indoor coil, a first reversing valve, a compressor, a second reversing valve, an outdoor coil and a first throttling component,
one end of the refrigerant heat exchange branch is connected with the second reversing valve, the other end of the refrigerant heat exchange branch is connected between the indoor coil and the outdoor coil, a heat exchange unit is arranged on the refrigerant heat exchange branch and is arranged to enable the refrigerant heat exchange branch and the floor heating circulation loop to exchange heat through the heat exchange unit,
the first reversing valve is configured to selectively connect the indoor coil to the air inlet of the compressor or to connect the air outlet of the compressor to the indoor coil,
the second reversing valve is arranged to be selectively opened in a first communication state or a second communication state, the first communication state is arranged to enable the refrigerant heat exchange branch to be connected with the air inlet of the compressor and the air outlet of the compressor to be connected with the outdoor coil, the second communication state is arranged to enable the outdoor coil to be connected with the air inlet of the compressor and the air outlet of the compressor to be connected with the refrigerant heat exchange branch,
the control method comprises the following steps:
before the air conditioning unit runs a heating working condition, a mode setting instruction of a control terminal is obtained;
if the acquired mode setting instruction is to operate an air conditioning heating mode, controlling the air conditioning unit to simultaneously operate the air conditioning heating mode and the floor heating mode;
if the mode setting instruction is not acquired, controlling the air conditioning unit to operate a floor heating mode;
in the process that the air conditioning unit simultaneously operates an air conditioning heating mode and a floor heating mode, acquiring indoor temperature, outdoor temperature, target temperature and outlet water temperature of the air conditioning unit;
selectively adjusting an operation mode of the air conditioning unit according to the indoor temperature, the outdoor temperature, the target temperature and the outlet water temperature;
the step of selectively adjusting the operation mode of the air conditioning unit according to the indoor temperature, the outdoor temperature, the target temperature, and the outlet water temperature specifically includes:
calculating a difference between the target temperature and the indoor temperature;
calculating a difference between the outlet water temperature and the outdoor temperature;
selectively adjusting an operation mode of the air conditioning unit according to a difference between the target temperature and the indoor temperature and a difference between the outlet water temperature and the outdoor temperature;
the step of selectively adjusting the operation mode of the air conditioning unit according to the difference between the target temperature and the indoor temperature and the difference between the outlet water temperature and the outdoor temperature includes:
if the difference value between the target temperature and the indoor temperature is smaller than a first preset difference value and/or the difference value between the outlet water temperature and the outdoor temperature is larger than a second preset difference value, controlling the air conditioning unit to only operate a floor heating mode;
and if the difference between the target temperature and the indoor temperature is greater than or equal to the first preset difference and the difference between the outlet water temperature and the outdoor temperature is less than or equal to the second preset difference, not adjusting the operation mode of the air conditioning unit.
2. The control method according to claim 1, characterized in that, after the step of "not adjusting the operation mode of the air conditioning unit", the control method further comprises:
acquiring the indoor temperature, the outdoor temperature and the target temperature and the outlet water temperature of the air conditioning unit again after a preset time period;
and selectively adjusting the operation mode of the air conditioning unit according to the re-acquired indoor temperature, the re-acquired outdoor temperature, the target temperature and the outlet water temperature.
3. The control method according to claim 2, wherein the step of selectively adjusting the operation mode of the air conditioning unit according to the re-acquired indoor temperature, outdoor temperature, target temperature, and outlet water temperature specifically includes:
calculating a difference between the re-acquired target temperature and the indoor temperature;
calculating the difference value between the re-acquired water outlet temperature and the outdoor temperature;
and selectively adjusting the operation mode of the air conditioning unit according to the difference value between the re-acquired target temperature and the indoor temperature and the difference value between the re-acquired outlet water temperature and the outdoor temperature.
4. The control method according to claim 3, wherein the step of selectively adjusting the operation mode of the air conditioning unit according to the difference between the re-acquired target temperature and the indoor temperature and the difference between the re-acquired outlet water temperature and the outdoor temperature specifically includes:
and if the difference value between the re-acquired target temperature and the indoor temperature is smaller than a third preset difference value and/or the difference value between the re-acquired outlet water temperature and the outdoor temperature is larger than a fourth preset difference value, controlling the air conditioning unit to only operate a floor heating mode.
5. The control method according to any one of claims 1 to 4, characterized in that the first preset value is 6 ℃; and/or
The second preset value is 14 ℃.
6. The control method according to any one of claims 2 to 4, characterized in that the preset time period is 30 minutes.
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CN102788383B (en) * 2012-08-27 2015-09-30 程宝华 A kind of module type intelligent heat-exchange unit
CN110779233A (en) * 2019-10-25 2020-02-11 杭州鸿雁管道系统科技有限公司 Air source heat pump air conditioner floor heating hot water unit

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