CN113007867A - Control method of multi-split air conditioning system - Google Patents

Control method of multi-split air conditioning system Download PDF

Info

Publication number
CN113007867A
CN113007867A CN202110177844.3A CN202110177844A CN113007867A CN 113007867 A CN113007867 A CN 113007867A CN 202110177844 A CN202110177844 A CN 202110177844A CN 113007867 A CN113007867 A CN 113007867A
Authority
CN
China
Prior art keywords
communicated
way valve
controlled
water
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110177844.3A
Other languages
Chinese (zh)
Inventor
王芳
余凯
倪毅
薛寒冬
傅英胜
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202110177844.3A priority Critical patent/CN113007867A/en
Publication of CN113007867A publication Critical patent/CN113007867A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The present disclosure provides a method for controlling a multi-split air conditioning system, including: a detection step, detecting the operation mode of the air conditioning system; a judging step, which is used for judging whether the operation mode of the air conditioning system is a hot water heating mode, a refrigerating and heating mode or a heating and heating mode; the control step is used for controlling the indoor unit to be closed and simultaneously controlling the outdoor heat exchanger to evaporate and absorb heat when the operation mode is a hot water making mode; when the operation mode is a refrigeration and hot water heating mode, controlling the indoor unit to be connected for refrigeration and simultaneously controlling the outdoor heat exchanger to absorb heat through evaporation or release heat through condensation; and when the operation mode is a heating and water heating mode, controlling the indoor unit to be connected for heating and simultaneously controlling the outdoor heat exchanger to evaporate and absorb heat. According to the outdoor heat exchanger, the mode of the outdoor heat exchanger can be freely switched according to the use requirements of users under the mode of refrigeration and hot water production, the system efficiency is improved as much as possible on the premise of meeting the use requirements, and the energy consumption of system operation is reduced.

Description

Control method of multi-split air conditioning system
Technical Field
The disclosure relates to the technical field of multi-split air conditioners, in particular to a control method of a multi-split air conditioner system.
Background
An air conditioning system with a hot water producing function requires that an air conditioner has the functions of refrigerating and heating and also has the function of producing hot water all the year round. When the system heats and heats water, the heating needs condensation heat, and the heating water also needs condensation heat, and at the moment, the outdoor heat exchanger must be used as an evaporator. However, when the system performs refrigeration and heating water operation, the refrigeration needs the cold energy absorbed by evaporation, and the heating water needs the heat energy of condensation, so that the outdoor heat exchanger is not only used singly, but also can be used as an evaporation side and a condensation side. The common air conditioning system cannot meet the switching of evaporation and condensation of the outdoor heat exchanger at present, and even in a system with the outdoor heat exchanger capable of being switched at will, how to control the outdoor heat exchanger can enable the system to operate efficiently on the premise of meeting the use requirements of users, which is a technical problem to be solved by the disclosure.
Because the modularized full-function multi-split air conditioner in the prior art cannot meet the technical problems that the outdoor heat exchanger can be randomly switched to evaporate/condense, the system energy efficiency can be improved under the condition that the use requirement of a user can be met, and the like, the control method of the multi-split air conditioner system is researched and designed.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
Therefore, the technical problem to be solved by the present disclosure is to overcome the defect that the multi-split air conditioning system in the prior art cannot meet the requirement that the outdoor heat exchanger can arbitrarily switch evaporation/condensation, and can also meet the requirement of a user for improving the system energy efficiency, thereby providing a control method of the multi-split air conditioning system.
In order to solve the above problems, the present disclosure provides a method for controlling a multi-split air conditioning system, the multi-split air conditioning system including:
the air conditioner comprises a compressor, an outdoor heat exchanger, a first air side pipe, a second air side pipe and a liquid side pipe, wherein the first air side pipe, the second air side pipe and the liquid side pipe are respectively communicated between the indoor side and the outdoor side, and the first air side pipe is communicated with the exhaust end of the compressor;
the indoor unit is connected and arranged between the second air side pipe and the liquid side pipe;
the hot water system also comprises at least one hot water module, wherein the hot water module is connected and arranged between the first air side pipe and the liquid side pipe and/or between the second air side pipe and the liquid side pipe;
the control method comprises the following steps:
a detection step, detecting the operation mode of the air conditioning system;
a judging step, which is used for judging whether the operation mode of the air conditioning system is a hot water heating mode, a refrigerating and heating mode or a heating and heating mode;
the control step is used for controlling the indoor unit to be closed, controlling the hot water module to be connected and heating water and controlling the outdoor heat exchanger to evaporate and absorb heat when the operation mode is a hot water heating mode; when the operation mode is a refrigeration and heating water mode, controlling the indoor unit to be connected for refrigeration, controlling the hot water module to be connected for heating water, and simultaneously controlling the outdoor heat exchanger to absorb heat by evaporation or release heat by condensation; when the operation mode is a heating and water heating mode, the indoor unit is controlled to be connected for heating, the hot water module is controlled to be connected for heating water, and the outdoor heat exchanger is controlled to evaporate and absorb heat.
In some embodiments, the detecting step is further configured to detect the hot water module in the case that the operation mode is a cooling and heating water modeWater temperature T ofTemperature of water(ii) a And detecting the sum of rated refrigerating capacity of the indoor unit with refrigerating requirement (sigma. indoor unit Q with requirement)Forehead in) (ii) a And detecting the sum of the rated heating capacities of the hot water modules with the demand for heating water (Sigma tank with demand Q)Sum of money s)；
The control step is carried out when T isTemperature of water≥T1 PresetOr (∑ having on-demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the temperature is more than or equal to K, controlling the indoor unit to be connected and refrigerate, controlling the water tank to be connected and heat water, and simultaneously controlling the outdoor heat exchanger to condense and release heat; when T isTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the temperature is less than K, the indoor unit is controlled to be switched on and refrigerate, the water tank is controlled to be switched on and heat water is produced, and meanwhile the outdoor heat exchanger is controlled to evaporate and absorb heat or to be switched off; when T is1 Preset＜TTemperature of water≤T2 PresetWhen the indoor unit is controlled to be switched on and refrigerate, the water tank is controlled to be switched on and heat water, and the outdoor heat exchanger is controlled to maintain the previous state;
wherein T is1 PresetIs a first predetermined temperature, is a constant, T2 PresetIs a second predetermined temperature, also constant, T1 Preset＞T2 PresetK is also a constant.
In some embodiments, T1 Preset＝50℃,T2 Preset＝40℃。
In some embodiments, when TTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) (sigma. having a demand tank Q)Sum of money s) When the outdoor heat exchanger is closed, controlling the outdoor heat exchanger to be closed; when T is2 Preset＜TTemperature of water≤T1 PresetWhen the temperature control device is started for the first time and enters the temperature interval, the outdoor heat exchanger is controlled according to TTemperature of water≥T1 PresetThe mode of (2) is executed.
In some embodiments, the value range of K is related To outdoor ambient temperature To-en, and when 26 ℃ ≦ To-en, K ≦ 1.5; when To-en is less than 24 ℃, K is 2.0; and when the temperature is more than or equal To 24 ℃ and more than or equal To-en and less than 26 ℃, K maintains the previous value, and if the temperature is the initial state, the value is 2.0.
In some embodiments, the compressor further comprises a first four-way valve and a second four-way valve, wherein a first end of the first four-way valve is communicated with a fifth end of the second four-way valve and communicated with a discharge end of the compressor;
a sixth end of the second four-way valve is communicated with the outdoor heat exchanger, and the other end of the outdoor heat exchanger can be communicated with the first gas side pipe;
the third end of the first four-way valve is communicated with the second gas side pipe;
and the second end and the fourth end of the first four-way valve are communicated with the seventh end and the eighth end of the second four-way valve and communicated to the suction end of the compressor together.
In some embodiments, when the operation mode is a hot water heating mode, the control step is used for controlling the first end and the second end of the first four-way valve to be communicated, the third end and the fourth end to be communicated, and simultaneously controlling the fifth end and the seventh end and the sixth end and the eighth end of the second four-way valve to be communicated;
and in the control step, when the operation mode is a heating and water-heating mode, the first end and the third end of the first four-way valve are controlled to be communicated, the second end and the fourth end of the first four-way valve are controlled to be communicated, and meanwhile, the fifth end and the seventh end of the second four-way valve are controlled to be communicated, and the sixth end and the eighth end of the second four-way valve are controlled to be communicated.
In some embodiments, the controlling step, when the operation mode is a cooling and heating water mode:
and when T isTemperature of water≥T1 PresetOr (sigma) is required internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the voltage is more than or equal to K, controlling the first end and the third end of the first four-way valve to be communicated, controlling the second end and the fourth end to be communicated, and simultaneously controlling the fifth end and the sixth end of the second four-way valve to be communicated, and controlling the seventh end and the eighth end to be communicated;
and when T isTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When K is less than K, the first end and the second end of the first four-way valve are controlled to be connectedThe third end and the fourth end are communicated, and meanwhile, the fifth end and the seventh end of the second four-way valve are controlled to be communicated, and the sixth end and the eighth end are controlled to be communicated;
and when T is2 Preset＜TTemperature of water≤T1 PresetAnd when the temperature interval is started for the first time, the first end and the third end of the first four-way valve are communicated, the second end and the fourth end of the first four-way valve are communicated, and meanwhile, the fifth end and the sixth end of the second four-way valve are communicated, and the seventh end and the eighth end of the second four-way valve are communicated.
In some embodiments, an outdoor throttling device is further arranged between the outdoor heat exchanger and the first liquid side pipe;
in the control step, the outdoor throttling device is controlled to be opened when the outdoor heat exchanger works, and the outdoor throttling device is controlled to be closed when the outdoor heat exchanger is controlled to be closed.
In some embodiments, the indoor unit comprises an indoor heat exchanger and an indoor unit pipe, the indoor unit pipe is provided with the indoor heat exchanger and a first throttling device;
in the control step, the first throttling device is controlled to be opened when the indoor unit is controlled to work, and the first throttling device is controlled to be closed when the indoor unit is controlled to be closed.
In some embodiments, the hot water module comprises a water tank and a fifth pipeline, the water tank is arranged on the fifth pipeline, one end of the fifth pipeline is communicated to the liquid side pipe, the other end of the fifth pipeline is communicated to the first air side pipe through a sixth pipeline, and the other end of the fifth pipeline is also communicated to the second air side pipe through a seventh pipeline;
a fifth throttling device is arranged on the fifth pipeline, a first control valve is further arranged on the sixth pipeline, and a second control valve is further arranged on the seventh pipeline; and/or a first check valve only allowing fluid to flow from the first gas side pipe to the fifth pipe is further arranged on the sixth pipe, and a second check valve only allowing fluid to flow from the fifth pipe to the second gas side pipe is further arranged on the seventh pipe;
in the control step, the fifth throttling device is controlled to be opened and the first control valve is controlled to be opened when the hot water module works, and the fifth throttling device is controlled to be closed and the first control valve is controlled to be closed when the hot water module is controlled to be closed.
The control method of the multi-split air conditioning system has the following beneficial effects:
1. the control method of the multi-split air conditioning system provided by the disclosure controls the outdoor heat exchanger to execute different actions according to different operation modes, for example, when the water heating mode is adopted, the indoor unit does not operate, when the water heating mode is adopted, the control method can control the execution of different actions according to the relationship between the sum of the heating water temperature and the rated refrigerating capacity of the indoor unit and the sum of the rated heating capacity of the hot water module, can control the outdoor heat exchanger to condense and release heat when the water temperature is high or the refrigerating demand of the indoor unit is greater than the heating water demand, and can improve the refrigerating capacity of the indoor unit by utilizing the outdoor heat to meet the indoor refrigerating demand and improve the energy efficiency; the outdoor heat exchanger can be controlled to evaporate and absorb heat when the water temperature is low and the refrigerating demand of the internal machine is less than the heating demand, and the heat of the heating water is improved by utilizing the outdoor heat so as to meet the indoor heating demand and improve the energy efficiency; the mode of the outdoor heat exchanger is freely switched according to the actual use requirement of a user, so that the energy efficiency of the system is improved;
2. this is disclosed still through containing the compressor, outdoor heat exchanger, the subcooler, ordinary indoor set, constant temperature dehumidification module, heat accumulation module, hot water module, floor heating module and photovoltaic module, the effect of the application of constant temperature dehumidification, heat accumulation defrosting, air conditioner demand, floor heating demand, life hot water demand and photovoltaic can be realized simultaneously to one set of system, the different actual demand of user is solved, each module can select to insert the system or not insert the system according to actual need, whether the access of each module can not produce any influence to other functional modules that have inserted in the system. The modularized full-function air conditioning system can meet the requirements of users in different regions, simultaneously does not need to install multiple sets of systems simultaneously, can carry out multiple functions and can be freely combined and matched. The system can save the maximum cost for the user on the premise of meeting the requirements of the user, and is convenient and flexible to install and comfortable to use. This is disclosed simultaneously according to user's demand, can freely arrange specific interior machine and module, realizes functions such as constant temperature dehumidification, heat accumulation defrosting and photovoltaic simultaneously. And through setting up the heat exchange assembly of module for heating up to the structure of capillary, can directly with refrigerant pipeline intercommunication and through the refrigerant heating up in the capillary, can improve heat exchange efficiency relatively for the hot-water heating, improve indoor heating effect, the comfort level increases.
Drawings
Fig. 1 is a system configuration diagram of a multi-split air conditioner of the present disclosure.
The reference numerals are represented as:
1. a compressor; 1a, an exhaust end; 1b, a suction end; 2. an outdoor heat exchanger; 31. a first gas-side tube; 32. a second gas-side tube; 33. a liquid side pipe; 41. a first four-way valve; 42. a second four-way valve; d1, first end; c1, second end; e1, third end; s1, a fourth end; d2, fifth end; c2, sixth end; e2, seventh end; s2, an eighth end; 51. a first control valve; 52. a second control valve; 53. a third control valve; 54. a fourth control valve; 55. a first check valve; 56. a second one-way valve; 57. a third check valve; 58. a fourth check valve; 61. an indoor unit; 611. an indoor heat exchanger; 62. a heat storage module; 621. a heat accumulator; 63. a constant-temperature dehumidification inner machine; 631. a first heat exchanger; 632. a second heat exchanger; 71. a first throttling device; 72. a second throttling device; 73. a third throttling means; 74. a fourth throttling device; 75. a fifth throttling device; 76. a sixth throttling means; 77. an outdoor throttling device; 8. a hot water module; 81. a water tank; 9. a floor heating module; 91. a heat exchange assembly; 151. a first large valve; 152. a second large valve; 153. a small valve; 101. indoor unit pipelines; 102. a heat storage pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. a fifth pipeline; 106. a sixth pipeline; 107. a seventh pipeline; 108. an eighth pipeline; 109. a ninth conduit; 11. an outdoor unit.
Detailed Description
As shown in fig. 1, the present disclosure provides a control method of a multi-split air conditioning system, which includes:
the air conditioner comprises a compressor 1, an outdoor heat exchanger 2, a first air side pipe 31, a second air side pipe 32 and a liquid side pipe 33, wherein the first air side pipe 31, the second air side pipe 32 and the liquid side pipe 33 are respectively communicated between the indoor side and the outdoor side, and the first air side pipe 31 is communicated with a discharge end 1a of the compressor 1;
the indoor unit 61 is connected between the second air side pipe 32 and the liquid side pipe 33;
at least one hot water module 8 is further included, the hot water module 8 is connected and arranged between the first air side pipe 31 and the liquid side pipe 33, and/or the hot water module 8 is connected and arranged between the second air side pipe 32 and the liquid side pipe 33;
the control method comprises the following steps:
a detection step, detecting the operation mode of the air conditioning system;
a judging step, which is used for judging whether the operation mode of the air conditioning system is a hot water heating mode, a refrigerating and heating mode or a heating and heating mode;
the control step is used for controlling the indoor unit to be closed, controlling the hot water module to be connected and heating water and controlling the outdoor heat exchanger to evaporate and absorb heat when the operation mode is a hot water heating mode; when the operation mode is a refrigeration and heating water mode, controlling the indoor unit to be connected for refrigeration, controlling the hot water module to be connected for heating water, and simultaneously controlling the outdoor heat exchanger to absorb heat by evaporation or release heat by condensation; when the operation mode is a heating and water heating mode, the indoor unit is controlled to be connected for heating, the hot water module is controlled to be connected for heating water, and the outdoor heat exchanger is controlled to evaporate and absorb heat.
The control method of the multi-split air conditioning system provided by the disclosure controls the outdoor heat exchanger to execute different actions according to different operation modes, for example, when the water heating mode is adopted, the indoor unit does not operate, when the water heating mode is adopted, the control method can control the execution of different actions according to the relationship between the sum of the heating water temperature and the rated refrigerating capacity of the indoor unit and the sum of the rated heating capacity of the hot water module, can control the outdoor heat exchanger to condense and release heat when the water temperature is high or the refrigerating demand of the indoor unit is greater than the heating water demand, and can improve the refrigerating capacity of the indoor unit by utilizing the outdoor heat to meet the indoor refrigerating demand and improve the energy efficiency; the outdoor heat exchanger can be controlled to evaporate and absorb heat when the water temperature is low and the refrigerating demand of the internal machine is less than the heating demand, and the heat of the heating water is improved by utilizing the outdoor heat so as to meet the indoor heating demand and improve the energy efficiency; namely, the mode of the outdoor heat exchanger is freely switched according to the actual use requirement of a user, and the energy efficiency of the system is improved.
The invention comprises a compressor, an outdoor heat exchanger, a subcooler, a common indoor unit, a constant temperature dehumidification module, a heat storage module, a hot water module and a floor heating module. The system can meet different actual requirements of users, and meanwhile, when the system operates in a refrigeration and hot water making mode, the mode of the outdoor heat exchanger can be freely switched according to the actual use requirement of the users, so that the energy efficiency of the system is improved.
Wherein the compressor is a variable frequency variable capacity compressor (other various types of compressors can also be used). The various components in the system diagram are illustrated in the figure.
The air conditioning system provided by the invention can meet the requirements of users in different regions, and can freely switch the mode of the outdoor heat exchanger according to the use requirements of the users in the mode of refrigeration and hot water production, thereby improving the system efficiency as much as possible and reducing the energy consumption of system operation on the premise of meeting the use requirements.
The invention can realize switching control of the outdoor heat exchanger according to the actual use requirement of a user in the air conditioning system with the hot water producing function, thereby improving the system efficiency as much as possible and saving electric energy on the premise of meeting the use requirement.
In some embodiments, the detecting step is further configured to detect the temperature T of the water in the hot water module 8 when the operation mode is the cooling and heating water modeTemperature of water(ii) a And detecting the sum of rated refrigerating capacities (sigma) of the indoor units with refrigerating demandsInner machine QForehead in) (ii) a And detecting the sum of the rated heating capacities of the hot water modules with the demand for heating water (Sigma tank with demand Q)Sum of money s)；
The control step is carried out when T isTemperature of water≥T1 PresetOr (∑ having on-demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the temperature is more than or equal to K, controlling the indoor unit to be connected and refrigerate, controlling the water tank to be connected and heat water, and simultaneously controlling the outdoor heat exchanger to condense and release heat; when T isTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the temperature is less than K, the indoor unit is controlled to be switched on and refrigerate, the water tank is controlled to be switched on and heat water is produced, and meanwhile the outdoor heat exchanger is controlled to evaporate and absorb heat or to be switched off; when T is1 Preset＜TTemperature of water≤T2 PresetWhen the indoor unit is controlled to be switched on and refrigerate, the water tank is controlled to be switched on and heat water, and the outdoor heat exchanger is controlled to maintain the previous state;
wherein T is1 PresetIs a first predetermined temperature, is a constant, T2 PresetIs a second predetermined temperature, also constant, T1 Preset＞T2 PresetK is also a constant.
The control method of the multi-split air conditioning system provided by the disclosure controls the outdoor heat exchanger to execute different actions according to different operation modes, for example, when the water heating mode is adopted, the indoor unit does not operate, when the water heating mode is adopted, the control method can control the execution of different actions according to the relationship between the sum of the heating water temperature and the rated refrigerating capacity of the indoor unit and the sum of the rated heating capacity of the hot water module, can control the outdoor heat exchanger to condense and release heat when the water temperature is high or the refrigerating demand of the indoor unit is greater than the heating water demand, and can improve the refrigerating capacity of the indoor unit by utilizing the outdoor heat to meet the indoor refrigerating demand and improve the energy efficiency; the outdoor heat exchanger can be controlled to evaporate and absorb heat when the water temperature is low and the refrigerating demand of the internal machine is less than the heating demand, and the heat of the heating water is improved by utilizing the outdoor heat so as to meet the indoor heating demand and improve the energy efficiency; namely, the mode of the outdoor heat exchanger is freely switched according to the actual use requirement of a user, and the energy efficiency of the system is improved.
In some embodiments, T1 Preset＝50℃,T2 Preset＝40℃。
The system can provide domestic hot water regardless of any mode. After being discharged from the compressor, the high-temperature and high-pressure gas passes through the oil separator and enters the domestic hot water module from the large valve 151 of the gas-side pipe (high-pressure). Enters the water tank through the electromagnetic valve A (a first control valve 51) to heat domestic hot water.
(1) The system only needs to produce hot water, and after the refrigerant heats the hot water, the refrigerant passes through a small valve of a liquid side pipe, enters a heat exchanger of an outdoor unit to evaporate and absorb heat, and then returns to the compressor through a four-way valve.
(2) The system has the requirements of refrigeration and hot water production, and the refrigerant is evaporated and absorbs heat in an inner machine with the refrigeration requirement after heating the hot water and then returns to the compressor. Or the refrigerant enters the indoor heat exchanger and the outdoor heat exchanger to evaporate and absorb heat together and then returns to the compressor (which mode is selected and can be determined according to the total requirements of hot water production and refrigeration).
According to the total demand of heating water and refrigeration, the control mode of switching the outdoor heat exchanger is as follows:
a) when T isTemperature of waterMore than or equal to 50 ℃ or sigma, and an internal machine Q with demandForehead in) /(∑ tank Q with demandSum of money s) And K (K is an amount related to the outdoor ambient temperature), both four-way valve a (first four-way valve 41) and four-way valve B (second four-way valve 42) are powered down. (the power-off state of the four-way valve is that D is communicated with C, and E is communicated with S, and the power-on state of the four-way valve is that D is communicated with E, and C is communicated with S), the outdoor heat exchanger is used as a condenser.
b) When T isTemperature of waterLess than or equal to 40 ℃, and (sigma is an internal machine Q with demandForehead in) /(∑ tank Q with demandSum of money s) When K is less than K, the power of the four-way valve A (the first four-way valve 41) is cut off, the power of the four-way valve B (the second four-way valve 42) is turned on, and the outdoor heat exchanger is used as an evaporator or is not used.
When the requirement is met under the premise of b) (sigma has the internal machine Q in demandForehead in) (sigma. having a demand tank Q)Sum of money s) And if the temperature of the throttling element between the subcooler and the fan is reduced to 0pls, the outdoor heat exchanger is not used. Cooling after condensation of heating waterThe refrigerant directly goes to the inner machine of refrigeration demand to evaporate and absorb heat, and then returns to the compressor.
c) When 40 ℃ is less than TTemperature of waterThe four-way valve state is maintained at the previous time when the temperature is less than 50 ℃, and the four-way valve enters the interval for the first time according to TTemperature of waterThe operation is carried out at the temperature of more than or equal to 50 ℃.
TABLE 1
Figure BDA0002940561740000081
K is basically required to ensure the refrigeration effect and the hot water effect at the outdoor temperature of 25 ℃.
The specific values appearing in the above scheme are only examples and can be specifically determined according to different systems.
(3) The system has the requirements of heating and hot water production, a part of high-temperature and high-pressure refrigerant discharged from the compressor heats hot water by the hot water removing module, and the other part of the high-temperature and high-pressure refrigerant is condensed at the indoor side to release heat and then returns to the outdoor unit to be evaporated and then returns to the compressor.
When a hot water module is accessed in the system, the main control of the air conditioning system executes hot water function operation according to the hot water temperature and the hot water quantity requirement set by a user. If the system is not connected with the hot water module, the system has no function, other functions connected in the system are not affected, and other functions can be normally realized.
In some embodiments, when TTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) (sigma. having a demand tank Q)Sum of money s) When the outdoor heat exchanger is closed, controlling the outdoor heat exchanger to be closed; when T is2 Preset＜TTemperature of water≤T1 PresetWhen the temperature control device is started for the first time and enters the temperature interval, the outdoor heat exchanger is controlled according to TTemperature of water≥T1 PresetThe mode of (2) is executed.
In some embodiments, the value range of K is related To outdoor ambient temperature To-en, and when 26 ℃ ≦ To-en, K ≦ 1.5; when To-en is less than 24 ℃, K is 2.0; and when the temperature is more than or equal To 24 ℃ and more than or equal To-en and less than 26 ℃, K maintains the previous value, and if the temperature is the initial state, the value is 2.0.
In some embodiments, a first four-way valve 41 and a second four-way valve 42 are further included, wherein a first end D1 of the first four-way valve 41 is communicated with a fifth end D2 of the second four-way valve 42 and is communicated to the exhaust end 1a of the compressor 1 together;
a sixth end C2 of the second four-way valve 42 is communicated with the outdoor heat exchanger 2, and the other end of the outdoor heat exchanger 2 can be communicated with the first gas-side pipe 31;
the third end E1 of the first four-way valve 41 is communicated with the second gas side pipe 32;
the second end C1 and the fourth end S1 of the first four-way valve 41 are communicated with the seventh end E2 and the eighth end S2 of the second four-way valve 42 and are communicated with the suction end 1b of the compressor 1.
In some embodiments, the controlling step is used for controlling the first end D1 of the first four-way valve 41 to communicate with the second end C1, the third end E1 to communicate with the fourth end S1, and simultaneously controlling the fifth end D2 of the second four-way valve 42 to communicate with the seventh end E2, and the sixth end C2 to communicate with the eighth end S2 when the operation mode is the hot water heating mode;
and the control step, when the operation mode is a heating and water heating mode, controlling the first end D1 of the first four-way valve 41 to be communicated with the third end E1, the second end C1 to be communicated with the fourth end S1, and simultaneously controlling the fifth end D2 of the second four-way valve 42 to be communicated with the seventh end E2, and the sixth end C2 to be communicated with the eighth end S2.
In some embodiments, the controlling step, when the operation mode is a cooling and heating water mode:
and when T isTemperature of water≥T1 PresetOr (sigma) is required internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the K is greater than or equal to K, the first end D1 of the first four-way valve 41 is controlled to be communicated with the third end E1, the second end C1 of the first four-way valve is controlled to be communicated with the fourth end S1, meanwhile, the fifth end D2 of the second four-way valve 42 is controlled to be communicated with the sixth end C2, and the seventh end E2 of the second four-way valve is controlled to be communicated with the eighth end S2;
and when T isTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the signal is less than K, the first end D1 and the second end D1 of the first four-way valve 41 are controlledThe end C1 is communicated, the third end E1 is communicated with the fourth end S1, and meanwhile, the fifth end D2 and the seventh end E2 of the second four-way valve 42 are controlled to be communicated, and the sixth end C2 and the eighth end S2 are controlled to be communicated;
and when T is2 Preset＜TTemperature of water≤T1 PresetWhen the temperature range is entered by the first start, the first four-way valve 41 and the second four-way valve 42 are controlled to maintain the previous state, the first end D1 of the first four-way valve 41 is controlled to be communicated with the third end E1, the second end C1 of the first four-way valve 41 is controlled to be communicated with the fourth end S1, and the fifth end D2 of the second four-way valve 42 is controlled to be communicated with the sixth end C2, and the seventh end E2 of the second four-way valve 42 is controlled to be communicated with the eighth end S2.
In some embodiments, an outdoor throttling device 77 is further arranged between the outdoor heat exchanger 2 and the first liquid side pipe 33;
in the control step, the outdoor throttling device 77 is controlled to be opened when the outdoor heat exchanger 2 works, and the outdoor throttling device 77 is controlled to be closed when the outdoor heat exchanger 2 is controlled to be closed.
In some embodiments, the indoor unit 61 includes an indoor heat exchanger 611 and an indoor unit pipe 101, and the indoor unit pipe 101 is provided with the indoor heat exchanger 611 and the first throttling device 71;
in the control step, the first throttling device 71 is controlled to be opened when the indoor unit 61 is controlled to work, and the first throttling device 71 is controlled to be closed when the indoor unit 61 is controlled to be closed.
In some embodiments, the hot water module 8 comprises a water tank 81 and a fifth pipeline 105, the water tank 81 is disposed on the fifth pipeline 105, one end of the fifth pipeline 105 is communicated to the liquid side pipe 33, the other end of the fifth pipeline 105 is communicated to the first air side pipe 31 through a sixth pipeline 106, and the other end of the fifth pipeline 105 is further communicated to the second air side pipe 32 through a seventh pipeline 107;
a fifth throttling device 75 is arranged on the fifth pipeline 105, a first control valve 51 is further arranged on the sixth pipeline 106, and a second control valve 52 is further arranged on the seventh pipeline 107; and/or, the sixth pipeline 106 is further provided with a first check valve 55 which only allows the fluid to flow from the first air side pipe 31 to the fifth pipeline 105, and the seventh pipeline 107 is further provided with a second check valve 56 which only allows the fluid to flow from the fifth pipeline 105 to the second air side pipe 32;
in the control step, the fifth throttling device 75 is controlled to be opened and the first control valve 51 is controlled to be opened when the hot water module 8 is controlled to work, and the fifth throttling device 75 is controlled to be closed and the first control valve 51 is controlled to be closed when the hot water module 8 is controlled to be closed.
In some embodiments, the present disclosure further includes at least one thermal storage module 62, the thermal storage module 62 being disposed between the second gas side tube 32 and the liquid side tube 33;
the constant-temperature dehumidification inner machine 63 is arranged between the first gas-side pipe 31 and the liquid-side pipe 33, and/or the constant-temperature dehumidification inner machine 63 is arranged between the second gas-side pipe 32 and the liquid-side pipe 33;
at least one hot water module 8 is further included, the hot water module 8 is arranged between the first air side pipe 31 and the liquid side pipe 33, and/or the hot water module 8 is arranged between the second air side pipe 32 and the liquid side pipe 33;
the floor heating system is characterized by further comprising at least one floor heating module 9, wherein the floor heating module 9 comprises a heat exchange assembly 91, the heat exchange assembly 91 is communicated between the first gas side pipe 31 and the liquid side pipe 33, and a refrigerant can flow through the heat exchange assembly 91 to exchange heat for floor heating;
also included is a photovoltaic module 10, the photovoltaic module 10 being capable of absorbing solar energy and generating electrical energy for supply to the multi-split air conditioning system.
The utility model provides a many online air conditioning system is through containing the compressor, outdoor heat exchanger, the subcooler, ordinary indoor set, constant temperature dehumidification module, the heat accumulation module, the hot water module, warm up module and photovoltaic module, one set of system can realize the effect of constant temperature dehumidification simultaneously, the heat accumulation is dissolved frost, the air conditioner demand, the demand of warming up, the application of life hot water demand and photovoltaic, solve the different actual demand of user, each module can select to insert the system or not insert the system according to actual need, whether the access of each module can not produce any influence to other functional modules that have inserted in the system. The modularized full-function air conditioning system can meet the requirements of users in different regions, simultaneously does not need to install multiple sets of systems simultaneously, can carry out multiple functions and can be freely combined and matched. The system can save the maximum cost for the user on the premise of meeting the requirements of the user, and is convenient and flexible to install and comfortable to use. This is disclosed simultaneously according to user's demand, can freely arrange specific interior machine and module, realizes functions such as constant temperature dehumidification, heat accumulation defrosting and photovoltaic simultaneously. And through setting up the heat exchange assembly of module for heating up to the structure of capillary, can directly with refrigerant pipeline intercommunication and through the refrigerant heating up in the capillary, can improve heat exchange efficiency relatively for the hot-water heating, improve indoor heating effect, the comfort level increases.
1. Hot water module
The system can provide domestic hot water regardless of any mode. After being discharged from the compressor, the high-temperature and high-pressure gas passes through the oil separator and enters the domestic hot water module from the first large valve 151 of the gas-side pipe (high pressure). Enters the water tank through the first control valve 51 (electromagnetic valve A) to heat domestic hot water.
(1) The system only needs to produce hot water, and after the refrigerant heats the hot water, the refrigerant passes through a small valve of a liquid side pipe, enters a heat exchanger of an outdoor unit to evaporate and absorb heat, and then returns to the compressor through a four-way valve.
(2) The system has the requirements of refrigeration and hot water production, and the refrigerant is evaporated and absorbs heat in an inner machine with the refrigeration requirement after heating the hot water and then returns to the compressor. Or the refrigerant enters the indoor heat exchanger and the outdoor heat exchanger to evaporate and absorb heat together and then returns to the compressor (which mode is selected and can be determined according to the total requirements of hot water production and refrigeration).
(3) The system has the requirements of heating and hot water production, a part of high-temperature and high-pressure refrigerant discharged from the compressor heats hot water by the hot water removing module, and the other part of the high-temperature and high-pressure refrigerant is condensed at the indoor side to release heat and then returns to the outdoor unit to be evaporated and then returns to the compressor.
When a hot water module is accessed in the system, the main control of the air conditioning system executes hot water function operation according to the hot water temperature and the hot water quantity requirement set by a user. If the system is not connected with the hot water module, the system has no function, other functions connected in the system are not affected, and other functions can be normally realized.
2. Common refrigerating and heating functional module
In some embodiments, the indoor unit 61 includes an indoor heat exchanger 611 and an indoor unit pipe 101, and the indoor heat exchanger 611 and the first throttling device 71 are disposed on the indoor unit pipe 101.
After being discharged from the compressor, the high-temperature and high-pressure gas is changed into medium-pressure and low-temperature liquid through the oil separator, the second four-way valve 42 and the outdoor heat exchanger, enters the ordinary indoor unit through the small valve of the liquid side pipe, is throttled, is evaporated and absorbs heat at the indoor side, performs refrigeration of the indoor unit, flows into the vapor-liquid separator through the second large valve 152 and the first four-way valve 41, and returns to the compressor. When the first four-way valve 41 and the second four-way valve 42 are powered and switched, the ordinary internal machine performs internal machine heating.
3. Heat storage defrosting module
In some embodiments, the heat storage module 62 includes a heat accumulator 621 and a heat storage pipeline 102, and the heat accumulator 621 and the second throttling device 72 are disposed on the heat storage pipeline 102.
The heat accumulation defrosting module is only used when the system is in heating operation. When the system is in a refrigerating mode or other modes of operation, the valve of the heat accumulation defrosting module is closed. When the system is in heating operation, the flow direction of a refrigerant in the system is the same as that of a common heating indoor unit, and the heat storage defrosting module is subjected to heat storage without influencing the heating effect of other indoor units by adjusting the opening degree of the electronic expansion valve in the heat storage defrosting module. When the outdoor unit needs defrosting operation, the valve of the common heating indoor unit is closed, the heat storage defrosting module is used for providing heat for defrosting, the defrosting does not take heat from the indoor space, and the indoor comfort is improved.
The heat and frost storage module can be selectively installed. If the master control of the air conditioning system detects that no heat storage defrosting module is connected into the system, executing common indoor defrosting during defrosting; when the heat storage defrosting module is detected to be connected, the system operates according to the set heat storage defrosting control logic, heat storage defrosting is executed during defrosting, and when the heat storage defrosting fails and defrosting cannot be completed, the system performs ordinary internal defrosting operation.
4. Constant temperature dehumidification module
In some embodiments, the thermostatic dehumidifying inner machine 63 comprises a first heat exchanger 631 and a second heat exchanger 632, the first heat exchanger 631 is disposed on a third pipeline 103, one end of the third pipeline 103 is communicated to the second gas-side pipe 32, the other end is communicated to the liquid-side pipe 33, the second heat exchanger 632 is disposed on a fourth pipeline 104, one end of the fourth pipeline 104 is communicated to the first gas-side pipe 31, and the other end is communicated to the liquid-side pipe 33.
After being discharged from the compressor, the high-temperature and high-pressure gas passes through the oil separator and is divided into two paths before entering the four-way valve: the first path passes through the second four-way valve 42 and the outdoor heat exchanger, becomes a low-pressure and medium-pressure liquid, passes through the small valve of the liquid side pipe, enters the constant temperature dehumidification module, is throttled by the third throttling device 73, and then is evaporated and absorbed in the first heat exchanger 631 to refrigerate the first heat exchanger 631. The second path directly enters the constant temperature dehumidification module through the first large valve 151 of the gas side pipe (high pressure), is condensed and releases heat in the second heat exchanger 632, passes through the fourth throttling device 74, is converged with the first path of refrigerant entering the third throttling device 73, and is evaporated and absorbs heat in the first heat exchanger 631.
The two paths are merged into one path, and then flow into the vapor-liquid separator through the second large valve 152 and the first four-way valve 41, and then return to the compressor. Due to the common condensation dehumidification system, the temperature of the air can be reduced simultaneously when dehumidification is carried out. The lower air-out temperature reduces the travelling comfort that the user used. When passing through the constant temperature dehumidification module, the high temperature (medium temperature) and high humidity air is firstly dehumidified and cooled at the first heat exchanger 631, and then is heated at the second heat exchanger 632, so that the outlet air temperature and humidity can be always kept in a comfortable range, and the use experience of a user is improved.
When the constant temperature dehumidification module needs to heat, the first four-way valve 41 and the second four-way valve 42 are powered to change directions, the flow direction of the refrigerant in the first heat exchanger 631 is consistent with that of the ordinary refrigerating and heating indoor unit, the refrigerant condensed and released in the second heat exchanger 632 is converged after being condensed and released in the first heat exchanger 631, and then the refrigerant returns to the outdoor heat exchanger through the liquid side pipe to be evaporated and then returns to the compressor. Compared with the common indoor heating, the constant-temperature dehumidification module has better heating effect because the number of the heat exchangers is two.
When the system detects that the constant temperature dehumidification module is accessed, the air conditioning system main control executes the constant temperature dehumidification function according to the mode requirement set by the user. If the system does not access the module, the system does not have the function, and the user can not set the function. Other functions accessed in the system are not influenced, and the other functions can be normally realized.
In some embodiments, a third throttling device 73 is further disposed on the third pipeline 103, and a fourth throttling device 74 is further disposed on the fourth pipeline 104.
5. Floor heating module
In some embodiments, the heat exchange assembly 91 is a capillary tube, the capillary tube is connected to the liquid side tube 33 through an eighth tube 108, the capillary tube is connected to the first gas side tube 31 through a ninth tube 109, a sixth throttling device 76 is disposed on the eighth tube 108 or the ninth tube 109, and a third control valve 53 is disposed on the ninth tube 109 or the eighth tube 108.
The operation of the floor heating module is the same as the principle of domestic hot water, and the detection access and implementation process is also the same.
In some embodiments, the photovoltaic module 10 includes a solar panel 10a, a junction station 10b, and a photovoltaic inverter 10c, and the solar panel 10a absorbs solar energy and supplies power to the outdoor unit of the multi-split air conditioning system after passing through the junction station 10b and the photovoltaic inverter 10c in sequence.
In some embodiments, when a first control valve 51 and a second control valve 52 are included, at least one of the first control valve 51 and the second control valve 52 is a solenoid valve; when the third control valve 53 and the fourth control valve 54 are included, at least one of the third control valve 53 and the fourth control valve 54 is a solenoid valve.
The present disclosure also provides a control method of a multi-split air conditioning system as set forth in any of the above, which, when simultaneously including the first four-way valve 41, the second four-way valve 42, the first and second throttling devices 71 and 72, the third and fourth throttling devices 73 and 74, the fifth and sixth throttling devices 75 and 76, and the first, second and third control valves 51, 52 and 53, implements mode control of at least one of cooling, heating water, heating, heat storage and dehumidification of an indoor space by controlling the first four-way valve 41, the second four-way valve 42, the first and second throttling devices 71 and 72, the third and fourth throttling devices 73 and 74, the fifth and sixth throttling devices 75 and 76, and the first, second and third control valves 51, 52 and 53.
In some embodiments, when refrigeration is required, the first throttling device 71 is opened, and the first four-way valve 41 is controlled such that the first end D1 is communicated with the second end C1 and the third end E1 is communicated with the fourth end S1; the second four-way valve 42 is controlled such that the fifth end D2 communicates with the sixth end C2 and the seventh end E2 communicates with the eighth end S2.
In the modularized full-function air conditioning system, the above 6 modules can be freely selected and matched to realize different use functions.
1. The system can solve the problem that one set of system has the functions of air conditioning refrigeration, heating, floor heating and domestic hot water, when the module is accessed, the main control of the system can automatically detect and execute according to the accessed module, when the system is not accessed to the module, the realization of other functions cannot be influenced, and other systems can be normally realized;
2. this is disclosed simultaneously according to user's demand, can freely match specific interior machine and module, realizes the function of constant temperature dehumidification, heat accumulation defrosting and photovoltaic.
The modularized full-function air conditioning system can meet the requirements of users in different regions, simultaneously does not need to install multiple sets of systems simultaneously, can carry out multiple functions and can be freely combined and matched. The system can save the maximum cost for the user on the premise of meeting the requirements of the user, and is convenient and flexible to install and comfortable to use.
The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present disclosure, and these modifications and variations should also be regarded as the protection scope of the present disclosure.

Claims (11)

1. A control method of a multi-split air conditioning system is characterized in that: the multi-split air conditioning system includes:
the air conditioner comprises a compressor (1), an outdoor heat exchanger (2), a first air side pipe (31), a second air side pipe (32) and a liquid side pipe (33), wherein the first air side pipe (31), the second air side pipe (32) and the liquid side pipe (33) are respectively communicated between the indoor side and the outdoor side, and the first air side pipe (31) is communicated with a gas discharge end (1a) of the compressor (1);
the air conditioner also comprises at least one indoor unit (61), wherein the indoor unit (61) is connected and arranged between the second air side pipe (32) and the liquid side pipe (33);
the device also comprises at least one hot water module (8), wherein the hot water module (8) is connected and arranged between the first air side pipe (31) and the liquid side pipe (33) and/or the hot water module (8) is connected and arranged between the second air side pipe (32) and the liquid side pipe (33);
the control method comprises the following steps:
a detection step, detecting the operation mode of the air conditioning system;
a judging step, which is used for judging whether the operation mode of the air conditioning system is a hot water heating mode, a refrigerating and heating mode or a heating and heating mode;
the control step is used for controlling the indoor unit to be closed, controlling the hot water module to be connected and heating water and controlling the outdoor heat exchanger to evaporate and absorb heat when the operation mode is a hot water heating mode; when the operation mode is a refrigeration and heating water mode, controlling the indoor unit to be connected for refrigeration, controlling the hot water module to be connected for heating water, and simultaneously controlling the outdoor heat exchanger to absorb heat by evaporation or release heat by condensation; when the operation mode is a heating and water heating mode, the indoor unit is controlled to be connected for heating, the hot water module is controlled to be connected for heating water, and the outdoor heat exchanger is controlled to evaporate and absorb heat.
2. The control method of a multi-split air conditioning system as set forth in claim 1, wherein:
the detection step is also used for detecting the water temperature T in the hot water module (8) when the operation mode is a refrigeration and heating water modeTemperature of water(ii) a And detecting the sum of rated refrigerating capacity of the indoor unit with refrigerating requirement (sigma. indoor unit Q with requirement)Forehead in) (ii) a And detecting the sum of the rated heating capacities of the hot water modules with the demand for heating water (Sigma tank with demand Q)Sum of money s)；
The control step is carried out when T isTemperature of water≥T1 PresetOr (∑ having on-demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the temperature is more than or equal to K, controlling the indoor unit to be connected and refrigerate, controlling the water tank to be connected and heat water, and simultaneously controlling the outdoor heat exchanger to condense and release heat; when T isTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the temperature is less than K, the indoor unit is controlled to be switched on and refrigerate, the water tank is controlled to be switched on and heat water is produced, and meanwhile the outdoor heat exchanger is controlled to evaporate and absorb heat or to be switched off; when T is1 Preset＜TTemperature of water≤T2 PresetWhen the indoor unit is controlled to be switched on and refrigerate, the water tank is controlled to be switched on and heat water, and the outdoor heat exchanger is controlled to maintain the previous state;
wherein T is1 PresetIs a first predetermined temperature, is a constant, T2 PresetIs a second predetermined temperature, also constant, T1 Preset＞T2 PresetK is also a constant.
3. The control method of a multi-split air conditioning system as set forth in claim 2, wherein:
T1 Preset＝50℃,T2 Preset＝40℃。
4. The control method of a multi-split air conditioning system as set forth in claim 2, wherein:
when T isTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) (sigma. having a demand tank Q)Sum of money s) When the outdoor heat exchanger is closed, controlling the outdoor heat exchanger to be closed; when T is2 Preset＜TTemperature of water≤T1 PresetWhen the temperature control device is started for the first time and enters the temperature interval, the outdoor heat exchanger is controlled according to TTemperature of water≥T1 PresetThe mode of (2) is executed.
5. The control method of a multi-split air conditioning system as set forth in claim 2, wherein:
the value range of K is related To outdoor environment temperature To-en, and when the temperature is more than or equal To 26 ℃, K is 1.5; when To-en is less than 24 ℃, K is 2.0; and when the temperature is more than or equal To 24 ℃ and more than or equal To-en and less than 26 ℃, K maintains the previous value, and if the temperature is the initial state, the value is 2.0.
6. The control method of a multi-split air conditioning system as set forth in any one of claims 1 to 5, wherein:
the compressor also comprises a first four-way valve (41) and a second four-way valve (42), wherein the first end (D1) of the first four-way valve (41) is communicated with the fifth end (D2) of the second four-way valve (42) and is communicated to the exhaust end (1a) of the compressor (1) together;
a sixth end (C2) of the second four-way valve (42) is communicated with the outdoor heat exchanger (2), and the other end of the outdoor heat exchanger (2) can be communicated with the first gas side pipe (31);
a third end (E1) of the first four-way valve (41) is communicated with the second gas side pipe (32);
the second end (C1) and the fourth end (S1) of the first four-way valve (41) are communicated with the seventh end (E2) and the eighth end (S2) of the second four-way valve (42) and are communicated to the suction end (1b) of the compressor (1) together.
7. The control method of a multi-split air conditioning system as set forth in claim 6, wherein:
the control step is used for controlling the first end (D1) of the first four-way valve (41) to be communicated with the second end (C1), the third end (E1) to be communicated with the fourth end (S1), and simultaneously controlling the fifth end (D2) of the second four-way valve (42) to be communicated with the seventh end (E2), and the sixth end (C2) to be communicated with the eighth end (S2) when the operation mode is the hot water heating mode;
and the control step of controlling the first end (D1) of the first four-way valve (41) to be communicated with the third end (E1), the second end (C1) of the first four-way valve to be communicated with the fourth end (S1), and controlling the fifth end (D2) of the second four-way valve (42) to be communicated with the seventh end (E2) and the sixth end (C2) of the second four-way valve to be communicated with the eighth end (S2) when the operation mode is the heating and heating water mode.
8. The control method of a multi-split air conditioning system as set forth in claim 6, wherein:
and the control step comprises the following steps of when the operation mode is a refrigeration and heating water mode:
and when T isTemperature of water≥T1 PresetOr (sigma) is required internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the K is larger than or equal to K, controlling the first end (D1) of the first four-way valve (41) to be communicated with the third end (E1), the second end (C1) to be communicated with the fourth end (S1), and simultaneously controlling the fifth end (D2) of the second four-way valve (42) to be communicated with the sixth end (C2) and the seventh end (E2) to be communicated with the eighth end (S2);
and when T isTemperature of water≤T2 PresetAnd (∑ has a demand internal machine QForehead in) /(∑ tank Q with demandSum of money s) When the voltage is less than K, controlling the first end (D1) of the first four-way valve (41) to be communicated with the second end (C1), the third end (E1) to be communicated with the fourth end (S1), and simultaneously controlling the fifth end (D2) of the second four-way valve (42) to be communicated with the seventh end (E2), and the sixth end (C2) to be communicated with the eighth end (S2);
and when T is2 Preset＜TTemperature of water≤T1 PresetWhen the temperature range is entered by the first start, the first four-way valve (41) and the second four-way valve (42) are controlled to maintain the previous state, the first end (D1) of the first four-way valve (41) is controlled to be communicated with the third end (E1), the second end (C1) of the first four-way valve is controlled to be communicated with the fourth end (S1), and meanwhile, the fifth end (D2) of the second four-way valve (42) is controlled to be communicated with the sixth end (C2), and the seventh end (E2) of the second four-way valve (42) is controlled to be communicated with the eighth end (S2).
9. The control method of a multi-split air conditioning system as set forth in claim 4, wherein:
an outdoor throttling device (77) is also arranged between the outdoor heat exchanger (2) and the first liquid side pipe (33);
in the control step, the outdoor throttling device (77) is controlled to be opened when the outdoor heat exchanger (2) works, and the outdoor throttling device (77) is controlled to be closed when the outdoor heat exchanger (2) is controlled to be closed.
10. A control method of a multi-split air conditioning system as set forth in any one of claims 1 to 9, wherein:
the indoor unit (61) comprises an indoor heat exchanger (611) and an indoor unit pipeline (101), and the indoor heat exchanger (611) and a first throttling device (71) are arranged on the indoor unit pipeline (101);
in the control step, the first throttling device (71) is controlled to be opened when the indoor unit (61) works, and the first throttling device (71) is controlled to be closed when the indoor unit (61) is controlled to be closed.
11. A control method of a multi-split air conditioning system as set forth in any one of claims 1 to 10, wherein:
the hot water module (8) comprises a water tank (81) and a fifth pipeline (105), the water tank (81) is arranged on the fifth pipeline (105), one end of the fifth pipeline (105) is communicated to the liquid side pipe (33), the other end of the fifth pipeline (105) is communicated to the first air side pipe (31) through a sixth pipeline (106), and the other end of the fifth pipeline (105) is also communicated to the second air side pipe (32) through a seventh pipeline (107);
a fifth throttling device (75) is arranged on the fifth pipeline (105), a first control valve (51) is further arranged on the sixth pipeline (106), and a second control valve (52) is further arranged on the seventh pipeline (107); and/or a first one-way valve (55) only allowing the fluid to flow from the first air side pipe (31) to the fifth pipe (105) is arranged on the sixth pipe (106), and a second one-way valve (56) only allowing the fluid to flow from the fifth pipe (105) to the second air side pipe (32) is arranged on the seventh pipe (107);
in the control step, the fifth throttling device (75) is controlled to be opened and the first control valve (51) is controlled to be opened when the hot water module (8) works, and the fifth throttling device (75) is controlled to be closed and the first control valve (51) is controlled to be closed when the hot water module (8) is controlled to be closed.
CN202110177844.3A 2021-02-09 2021-02-09 Control method of multi-split air conditioning system Pending CN113007867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110177844.3A CN113007867A (en) 2021-02-09 2021-02-09 Control method of multi-split air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110177844.3A CN113007867A (en) 2021-02-09 2021-02-09 Control method of multi-split air conditioning system

Publications (1)

Publication Number Publication Date
CN113007867A true CN113007867A (en) 2021-06-22

Family

ID=76383926

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110177844.3A Pending CN113007867A (en) 2021-02-09 2021-02-09 Control method of multi-split air conditioning system

Country Status (1)

Country Link
CN (1) CN113007867A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114508837A (en) * 2021-12-24 2022-05-17 青岛海尔空调电子有限公司 Control method for three-pipe type multi-split air conditioning unit

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200943947Y (en) * 2006-08-26 2007-09-05 珠海格力电器股份有限公司 Heat pump hot water multiple-linking air conditioner
CN101769580A (en) * 2009-01-06 2010-07-07 珠海格力电器股份有限公司 Air conditioner heat pump hot water unit and working method thereof
EP2538145A2 (en) * 2011-06-23 2012-12-26 Samsung Electronics Co., Ltd. Heat Pump and Method for Controlling the Same
US20150040595A1 (en) * 2012-03-15 2015-02-12 Mitsubishi Electric Corporation Refrigeration cycle apparatus
CN204593946U (en) * 2015-04-07 2015-08-26 珠海格力电器股份有限公司 Air conditioning and water heating system
CN109028650A (en) * 2018-07-27 2018-12-18 青岛海信日立空调系统有限公司 A kind of multi-gang air-conditioner hot water integrated machine
CN109405102A (en) * 2018-10-08 2019-03-01 珠海格力电器股份有限公司 Air-conditioning system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200943947Y (en) * 2006-08-26 2007-09-05 珠海格力电器股份有限公司 Heat pump hot water multiple-linking air conditioner
CN101769580A (en) * 2009-01-06 2010-07-07 珠海格力电器股份有限公司 Air conditioner heat pump hot water unit and working method thereof
EP2538145A2 (en) * 2011-06-23 2012-12-26 Samsung Electronics Co., Ltd. Heat Pump and Method for Controlling the Same
US20150040595A1 (en) * 2012-03-15 2015-02-12 Mitsubishi Electric Corporation Refrigeration cycle apparatus
CN204593946U (en) * 2015-04-07 2015-08-26 珠海格力电器股份有限公司 Air conditioning and water heating system
CN109028650A (en) * 2018-07-27 2018-12-18 青岛海信日立空调系统有限公司 A kind of multi-gang air-conditioner hot water integrated machine
CN109405102A (en) * 2018-10-08 2019-03-01 珠海格力电器股份有限公司 Air-conditioning system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114508837A (en) * 2021-12-24 2022-05-17 青岛海尔空调电子有限公司 Control method for three-pipe type multi-split air conditioning unit
WO2023116854A1 (en) * 2021-12-24 2023-06-29 青岛海尔空调电子有限公司 Control method for three-pipe type multi-split air conditioning assembly

Similar Documents

Publication Publication Date Title
CN107178833B (en) Heat recovery external machine system and air conditioning system
US20220011014A1 (en) Air conditioning system
CN113154522B (en) Multi-connected air conditioner system and defrosting control method
CN112856613A (en) Multi-split air conditioning system and control method thereof
EP4023961B1 (en) Oil return control method of multifunctional multi-split system with two four-way valves
CN111271893A (en) Air-conditioning heat pump hot water system and control method thereof
CN214223244U (en) Multi-split air conditioner
CN113007867A (en) Control method of multi-split air conditioning system
CN214275936U (en) Multi-split air conditioner
CN115127196A (en) Heat storage defrosting control system, control method and air conditioner
CN213514499U (en) Heat pump system and air conditioning equipment
CN112539458A (en) Multi-split air conditioner and control method thereof
CN211782077U (en) Air conditioner heat pump hot water system
CN112665052A (en) Multi-split air conditioning system
CN214371046U (en) Multi-split air conditioning system
CN214536575U (en) Multi-split air conditioning system
CN112665015A (en) Multi-split air conditioning system and control method thereof
CN213931199U (en) Outdoor heating assembly and multi-split air conditioning system
CN214665333U (en) Multi-split air conditioning system
CN219775895U (en) Air conditioner and solar water heating combined system
CN214370578U (en) Multi-split air conditioner
CN214249789U (en) Multi-split air conditioner
CN217383113U (en) Air conditioner
CN214249790U (en) Multi-split air conditioner
CN216924596U (en) Triple-generation air-conditioning hot water system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination