CN1324272C - Air conditioner and method for controlling the same - Google Patents

Air conditioner and method for controlling the same Download PDF

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Publication number
CN1324272C
CN1324272C CNB2004100022859A CN200410002285A CN1324272C CN 1324272 C CN1324272 C CN 1324272C CN B2004100022859 A CNB2004100022859 A CN B2004100022859A CN 200410002285 A CN200410002285 A CN 200410002285A CN 1324272 C CN1324272 C CN 1324272C
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CN
China
Prior art keywords
outdoor
indoor
compressor
unit
refrigerant
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Expired - Fee Related
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CNB2004100022859A
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Chinese (zh)
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CN1609527A (en
Inventor
金宇显
郑圭夏
郑铉锡
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Publication of CN1609527A publication Critical patent/CN1609527A/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
    • 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
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/54—Heating and cooling, simultaneously or alternatively
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/007—Compression machines, plants or systems with reversible cycle not otherwise provided for three pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues
    • F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/027—Compressor control by controlling pressure
    • F25B2600/0271—Compressor control by controlling pressure the discharge pressure
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/17—Speeds
    • F25B2700/172—Speeds of the condenser fan
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Provided is an air conditioner, and its control method capable of appropriately adjusting the amount of a refrigerant flowing from a compressor to an indoor unit in consideration of an operation load of the indoor unit during cooling and heating concurrent operation. The multiple type air conditioner with a plurality of indoor units connected to an outdoor unit includes an outdoor control part controlling the outdoor unit. The outdoor control part controls an opening of an outdoor side motor-operated expansion valve based on information with respect to an operation load of the indoor unit received from each indoor control part, and it appropriately adjusts the refrigerant sent to the indoor unit for heating operation, and the indoor unit for cooling operation. The outdoor control part sets a compression capacity of the compressor based on outdoor temperature, and it controls an outdoor fan to control delivery output of the compressor.

Description

Air-conditioning and control method thereof
Technical field
The present invention relates in general to the method for a kind of air-conditioning and control air-conditioning, more particularly, relate to a kind of air-conditioning with an outdoor unit and a plurality of indoor units, described a plurality of indoor unit is connected to described outdoor unit, some indoor units can be with refrigeration mode work like this, and the other indoor unit also relates to a kind of control air-conditioning method of operating simultaneously with heating mode work.
Background technology
Usually, traditional multiple unit type air-conditioning comprises an outdoor unit and a plurality of indoor unit that is connected to outdoor unit, freezes and/or heats room air with refrigeration mode and/or heating mode, thereby the air in the interior space is controlled.In traditional multiple unit type air-conditioning, outdoor unit comprises a plurality of compressors, a plurality of outdoor heat exchanger and outdoor expansion valve, and each indoor unit comprises indoor heat exchanger and indoor expansion valve.Outdoor and indoor expansion valve is an automatic expansion valve.
The user who is in the chamber with traditional multiple unit type air conditioner indoor unit can carry out the selection of different operation modes as required in refrigeration mode and heating mode.
For example, because be in indoor user variation according to indoor air temperature in the seasonal variations process, perhaps according to the variation of the environmental condition of the interior space, temperature sensation difference to room air, tradition multiple unit type air-conditioning may be with integrated mode work, according to user's selection, with the refrigeration room air, operate with the heating room air with heating mode simultaneously by some other indoor units with the refrigeration mode operation for the some of them indoor unit.
In the integrated mode operating process, tradition multi-user type air-conditioning may be with the work of refrigeration holotype, wherein the major part of indoor unit is operated with refrigeration mode, less important part is operated with heating mode, perhaps with the work of heating holotype, wherein the major part of indoor unit is operated with heating mode, and less important part is operated with refrigeration mode.In the explanation of back, being called as refrigeration based on the integrated mode of refrigeration mode is main integrated mode, is heated to be main integrated mode and be called as based on the integrated mode of heating mode.
In the integrated mode operating process of traditional multiple unit type air-conditioning, output refrigerant from compressor discharge is divided into two parts, described two parts are offered first group of indoor unit and second group of indoor unit respectively, described first group of indoor unit is operated under the refrigeration mode, and described second group of indoor unit is operated in the heating mode.In other words, some output refrigerant that discharge in the compressor of outdoor unit are provided for the outdoor heat exchanger as condenser, and the remainder of output refrigerant is provided for the indoor heat exchanger that is operated in the indoor unit in the heating mode, and does not pass through outdoor heat exchanger.
When indoor unit operated in refrigeration mode or the heating mode, the service load of being born by indoor unit often changed.Therefore, lack than the number that is operated in the indoor unit in the refrigeration mode even be operated in the number of the indoor unit in the heating mode, total may be than increasing De Genggao by the total work load that is operated in the indoor unit in the refrigeration mode by the work load that is operated in the indoor unit carrying in the heating mode.In the integrated mode operating process of traditional multiple unit type air-conditioning, output refrigerant from compressor discharge must suitably be divided into two parts, described two parts satisfy be operated in the refrigeration mode respectively and heating mode in the demand of total work load of two groups of indoor units carryings.
But traditional multiple unit type air-conditioning is controlled the amount that is assigned with part of output refrigerant only according to the number that is operated in two groups of indoor units in refrigeration mode and the heating mode.Therefore, traditional multiple unit type air-conditioning can not accurately be controlled the amount that is assigned with part of output refrigerant, and describedly will be reached by the requirement that is operated in two groups of total work load that indoor unit carried in refrigeration mode and the heating mode respectively by the amount of portions.
Like this, traditional multiple unit type air-conditioning may offer excessive output refrigerant the first group of indoor unit that is operated under the refrigeration mode, and offers the amount possibility deficiency of the refrigerant that is operated in second group of indoor unit in the heating mode.Under above-mentioned state, the refrigeration mode performance that is operated in the heating mode performance of the indoor unit in the heating mode and is operated in the indoor unit in the refrigeration mode may reduce.
Summary of the invention
Therefore, an aspect of of the present present invention provides the method for a kind of air-conditioning and control air-conditioning, wherein in the integrated mode operating process of air-conditioning, from the output refrigerant of compressor discharge according to be operated in respectively two groups of indoor units in refrigeration mode and the heating mode respectively the service load of carrying reasonably control, like this, output refrigerant accurately is divided into two parts, and described two parts are offered two groups of indoor units respectively.
Others of the present invention and/or characteristics partly are embodied in following in the explanation of the present invention, and part is embodied in from the present invention the scope apparent or that can know by enforcement of the present invention.
Above-mentioned and/or other method can realize that described air-conditioning comprises: the outdoor unit with compressor, outdoor heat exchanger, outdoor expansion valve and close/open valve by a kind of air-conditioning is provided; The a plurality of indoor units that have a plurality of indoor heat exchangers respectively; First refrigerant pipe is at the same time by after the close/open valve; Refrigerant from compressor discharge flows to a plurality of indoor units by described first refrigerant pipe from compressor; Second refrigerant pipe after by outdoor heat exchanger and outdoor expansion valve, flows to a plurality of indoor units by described second refrigerant pipe from compressor from the refrigerant of compressor discharge; Control module, described control module is according to will be by the service load of a plurality of indoor units carrying, control the amount of refrigerant of the amount of refrigerant of first refrigerant pipe of flowing through and second refrigerant pipe of flowing through, wherein control module can be controlled close/open valve and outdoor expansion valve, with control the flow through amount of refrigerant of first refrigerant pipe and the amount of refrigerant of second refrigerant pipe of flowing through.
Close/open valve is connected to position between compressor and the outdoor heat exchanger at its inlet, and is connected to a plurality of indoor units in its outlet.
Outdoor expansion valve can be connected to the outlet of outdoor heat exchanger.
Control module can be controlled close/open valve and outdoor expansion valve, with control the flow through amount of refrigerant of first refrigerant pipe and the amount of refrigerant of second refrigerant pipe of flowing through.
Control module can comprise: indoor control unit is used for providing with by a plurality of service loads that a plurality of indoor unit carried that are operated in refrigeration mode or heating mode; And outdoor control unit, be used to respond the service load that indoor control unit provides, the aperture opening ratio of control close/open valve and outdoor expansion valve.
Outdoor control unit can be determined the aperture opening ratio of outdoor expansion valve, with the service behaviour of optimization work at the indoor unit of refrigeration mode, and in refrigeration is the main combination manipulation mode course of work, optimization comprises the indoor unit that is operated in the refrigeration mode and is operated in the service behaviour of all indoor units of the indoor unit in the heating mode, wherein said in operative combination operating process based on refrigeration, the major part of indoor unit is operated in the refrigeration mode, and the less important part of indoor unit is operated in the heating mode.
Unit further comprises a plurality of indoor temperature transmitters respectively in institute's multicell, and indoor control unit can provide the service load by a plurality of indoor unit carryings according to indoor temperature around the indoor unit and the difference between the preset reference temperature.
Outdoor control unit can be before determining the aperture opening ratio of outdoor expansion valve according to total work load ratio result, relatively will by be operated in the heating mode total work load that indoor unit carried and by the total work load that indoor unit carried that is operated in the refrigeration mode.
Above-mentioned and/or others can realize that described air-conditioning comprises: outdoor unit, outdoor expansion valve, close/open valve, outdoor fan, outdoor temperature sensor and pressure sensor with compressor by a kind of air-conditioning is provided; A plurality of indoor units, each indoor unit has indoor temperature transmitter and indoor heat exchanger; First refrigerant pipe by after the close/open valve, flows to a plurality of indoor units by described first refrigerant pipe from compressor from the refrigerant of compressor discharge; Second refrigerant pipe after by outdoor heat exchanger and outdoor expansion valve, flows to a plurality of indoor units by described first refrigerant pipe from compressor from the refrigerant of compressor discharge; Indoor control unit, described indoor control unit provides the service load by a plurality of indoor units carryings according to the difference between the indoor temperature that indoor temperature transmitter detected of indoor unit and the default reference temperature; Outdoor control unit, the described outdoor control unit response service load that indoor control unit provided, the aperture opening ratio of control close/open valve and outdoor expansion valve, and according to outdoor temperature that outdoor temperature sensor detected, determine the demand compression volume of compressor, and according to the output refrigerant pressure that when compressor need-based compression volume is operated, detects, the rotating speed of control room exterior wing by pressure sensor.
Outdoor control unit can determine whether the demand compression volume of compressor uprises when the outdoor temperature that is detected by outdoor temperature sensor uprises.
The rotating speed that outdoor control unit can increase outdoor fan to be reducing the output refrigerant pressure of compressor, and the rotating speed that reduces outdoor fan is to increase the output refrigerant pressure of compressor.
Outdoor unit can also comprise the velocity sensor of the rotating speed of sensing chamber's exterior wing, and outdoor control unit can be according to the rotating speed control room exterior wing of the outdoor fan that is detected by velocity sensor.
Above-mentioned and/or others can realize that wherein air-conditioning has outdoor unit by a kind of method of controlling air-conditioning is provided, and described outdoor unit has compressor, outdoor heat exchanger, outdoor expansion valve and close/open valve; The a plurality of indoor units that have a plurality of indoor heat exchangers respectively; First refrigerant pipe,, by after the close/open valve, flow to a plurality of indoor units by described first refrigerant pipe from compressor from the refrigerant of compressor discharge; Second refrigerant pipe, after by outdoor heat exchanger and outdoor expansion valve, refrigerant from compressor discharge flows to a plurality of indoor units by described second refrigerant pipe from compressor, and described method comprises step: calculating will be by the service load of a plurality of indoor unit carryings; With according to will be by the service load of a plurality of indoor units carrying, control the amount of refrigerant of the amount of refrigerant of first refrigerant pipe of flowing through and second refrigerant pipe of flowing through, wherein evaluation work load and control amount of refrigerant can comprise step: calculating in refrigeration is in the main integrated mode operating process, will by be operated in the refrigeration mode total work load that indoor unit carried and will be by the total work load that indoor unit carried that is operated in the heating mode, be in the main integrated mode operating process wherein in refrigeration, the major part of a plurality of indoor units will be operated in the refrigeration mode, and the less important part of a plurality of indoor units is operated in the heating mode; Relatively by the total work load that indoor unit carried and the total work load that indoor unit carried that is operated under the heating mode that are operated under the refrigeration mode; With the comparative result control close/open valve of the total work of control basis load and the aperture opening ratio of outdoor expansion valve.
In described method, will can calculate according to the difference between indoor temperature around the indoor unit and the default reference temperature by the service load of a plurality of indoor units carrying.
Can carry out the control of the aperture opening ratio of outdoor expansion valve service behaviour, and optimization is the service behaviour that comprises the indoor unit that is operated in the refrigeration mode in the main integrated mode operating process and be operated in all indoor units in the heating mode in refrigeration with the indoor unit of optimization work under refrigeration mode.
Described method also comprises step: after the amount of control refrigerant, detect outdoor temperature by the outdoor temperature sensor that is arranged in the outdoor unit; According to the demand compression volume of determining compressor by the outdoor temperature that outdoor temperature sensor detected.
Described method can also comprise step: the output refrigerant pressure that detects compressor when compressor compression volume is according to demand worked; According to the output refrigerant pressure of compressor, control is arranged on the rotating speed of the outdoor fan in the output unit.
The control of the rotating speed of outdoor fan can comprise: the output refrigerant pressure and the default reference pressure that compare compressor; When the output refrigerant pressure of compressor is bigger than preset reference value, increases the rotating speed of outdoor fan, and hour reduce the rotating speed of outdoor fan at the output refrigerant pressure of compressor than preset reference pressure.
Description of drawings
These and other aspect of the present invention will be by preferred embodiment following explanation and become apparent in conjunction with the accompanying drawings and should be readily appreciated that, wherein:
Fig. 1 shows is refrigerating circuit according to the air-conditioning in the embodiments of the invention;
Fig. 2 shows is refrigerating circuit among Fig. 1, and it shows at air-conditioning work flow direction of refrigerant in the refrigerating circuit when refrigeration is main integrated mode;
Fig. 3 shows is that total work load ratio that indoor unit carried when being operated in heating mode in is operated in the service load that indoor unit carried in the refrigeration mode will be big the time, the indoor unit of air-conditioning of the present invention operating characteristics as the chart of the function of the aperture opening ratio of outdoor expansion valve;
Fig. 4 shows be total work load that indoor unit carried in being operated in heating mode unlike being operated in the service load that indoor unit carried in the refrigeration mode when big, the operating characteristics of the indoor unit of air-conditioning of the present invention is as the chart of the function of outdoor expansion valve aperture opening ratio; With
Fig. 5 A and 5B show is flow chart according to air conditioning control method of the present invention.
The specific embodiment
Now will be in detail with reference to preferred implementation of the present invention, embodiment is illustrated that in conjunction with the accompanying drawings wherein identical drawing reference numeral is represented identical parts.Following embodiment with reference to accompanying drawing is intended to the present invention is made an explanation.
In an embodiment, the present invention is and has outdoor unit and a plurality of multiple unit type air-conditioning that is connected to the indoor unit of outdoor unit.
As shown in fig. 1, refrigerating circuit according to multiple unit type air-conditioning of the present invention comprises an outdoor unit 100 and four indoor units, be respectively unit 200a, 200b, 200c and 200d in first, second, third and the fourth ventricle that is connected to outdoor unit 100, refrigeration switch element 300 is arranged between outdoor unit 100 and four indoor unit 200a, 200b, 200c and the 200d to switch the cryogen flow in the refrigerating circuit.
Outdoor unit 100 comprises a plurality of outdoor heat exchanger 101a and 101b, outdoor fan 113 and is connected to the outdoor expansion valve 102 of the outlet of outdoor heat exchanger 101a and 101b.Outdoor unit 100 also comprises first close/open valve 111 and is connected to outlet and first check-valves 112, a plurality of variable displacement compressor 103a and 103b, cross valve 104, receiver 106 and the hydraulic accumulator 107 in parallel with outdoor expansion valve 102 of outdoor heat exchanger 101a and 101b.Outdoor unit 100 also comprises second close/open valve 109 and second check-valves 110 with will be from the output refrigerant bypass of compressor 103a and 103b discharging to the indoor unit that is operated in the heating mode, and does not allow to export refrigerant by outdoor heat exchanger 101a and 101b.
Outdoor unit 100 also comprises outdoor temperature sensor 108, the velocity sensor of the temperature that is used for sensing chamber's outer air, it is that the rpm sensor 114 of the rotating speed (rpm) that is used for sensing chamber's exterior wing 113 and being used to detects the pressure sensor 105 from the pressure of the output refrigerant of compressor 103a and 103b discharging.
Air-conditioning of the present invention also comprises the operation of outdoor control unit 120 with control outdoor unit 100.
Outdoor control unit 120 is controlled the aperture opening ratio of outdoor expansion valve 103 based on the information data signal of the service load of exporting from a plurality of indoor control unit 210a, 210b, 210c and 210d and representing to be carried by indoor control unit 200a, 200b, 200c and 200d, outdoor control unit 120 is controlled the amount that is assigned with part of output refrigerant suitably like this, and the described part that is assigned with is offered the indoor unit that is operated in respectively in heating and the refrigeration mode respectively.Outdoor control unit 120 is also based on information data signal control compressor 103a and 103b and the outdoor fan 113 exported from outdoor temperature sensor 108, rpm sensor 114 and pressure sensor 105.
Each comprises indoor heat exchanger 201a, 201b, 201c, 201d, indoor expansion valve 202a, 202b, 202c, 202d first to fourth indoor unit 200a, 200b, 200c and 200d, and indoor temperature transmitter 203a, the 203b, 203c, the 203d that are used for detecting the temperature of each the chamber room air that is separately installed with indoor unit 200a, 200b, 200c and 200d.Outdoor and indoor expansion valve 1 02,202a, 202b, 202c and 202d are automatic expansion valve.
A plurality of indoor control units are set in the air-conditioning of the present invention controlling first to fourth indoor unit 200a, 200b, 200c and 200d respectively independently, and described indoor control unit is first, second, third and fourth ventricle inner control unit 210a, 210b, 210c and 210d.
First to fourth indoor control unit 210a, 210b, 210c and 210d use the function key of indoor unit 200a, 200b, 200c and 200d or are used for the default difference basis with reference to indoor temperature of remote controllers of indoor unit 200a, 200b, 200c and 200d based on the indoor air temperature that detects by indoor temperature transmitter 203a, 203b, 203c and 203d with by the user, calculate the service load by first to fourth indoor unit 200a, 200b, 200c, 200d carrying respectively.After calculating the service load carried by indoor unit 200a, 200b, 200c and 200d, indoor control unit 210a, 210b, 210c and 210d will represent that the information data signal of service load exports to outdoor control unit 120.
First to fourth indoor control unit 210a, 210b, 210c and 210d and outdoor control unit 120 are also controlled a plurality of indoor fan (not shown) and indoor expansion valve 202a, 202b, 202c and 202d together.
Refrigerant switch element 300 comprises a plurality of High- pressure air valve 301a, 301b, 301c and 301d, a plurality of low pressure gas valve 302a, 302b, 302c and 302d and expansion valve 303.A plurality of High- pressure air valve 301a, 301b, 301c and 301d are mounted respectively on a plurality of arms of high-voltage tube HPP, and described high-voltage tube HPP extends between outdoor unit 100 and indoor unit 200a, 200b, 200c and the 200d and extends.A plurality of low pressure gas valve 302a, 302b, 302c and 302d are mounted respectively on a plurality of arms of low-voltage tube LPP, and described low-voltage tube LPP extends between outdoor unit 100 and indoor unit 200a, 200b, 200c and the 200d and extends.Expansion valve 303 is an automatic expansion valve, and it is installed on the shared hydraulic tube, and described hydraulic tube extends to outdoor unit 100 from indoor unit 200a, 200b, 200c and 200d.All valves of outdoor control unit 120 control refrigerant switch elements 300.
A plurality of High- pressure air valve 301a, 301b, 301c and the 301d of refrigerant switch element 300 is connected to the end of the cross valve 104 of outdoor unit 100 by high-voltage tube HPP.A plurality of low pressure gas valve 302a, 302b, 302c and the 302d of refrigerant switch element 300 is connected to the hydraulic accumulator 107 of outdoor unit 100 by low-voltage tube LPP.
Refrigerant switch element 300 is connected to the outdoor heat exchanger 101a and the 101b of outdoor unit 100 by return duct RP, and outdoor expansion valve 102 is installed on the return duct RP.Be installed in that return duct RP goes up and first close/open valve 111 in parallel with outdoor expansion valve 102 is the valve of control refrigerant flow speed.
Return duct RP is connected to a plurality of pipe EP1, EP2, EP3 and EP4, and described pipe extends from indoor unit 200a, 200b, 200c and 200d.
What Fig. 2 showed is refrigerating circuit among Fig. 1, and it shows in air-conditioning work is the flow direction of the refrigerant in the refrigerating circuit in the main integrated mode in refrigeration.
In Fig. 2, it is main integrated mode operation that air-conditioning is carried out refrigeration, and wherein the first indoor unit 200a is operated in the heating mode, second to the fourth ventricle unit 200b, 200c and 200d be operated in the refrigeration mode.In order to carry out refrigeration is main integrated mode operation, and compressor 103a and 103b start working.In above-mentioned state, outdoor expansion valve 102 is opened with predetermined aperture opening ratio, and second close/open valve 109 is opened, and the High-pressure air valve 301a that is operated in the first indoor unit 200a in the heating mode is opened.In addition, being operated in High- pressure air valve 301b, 301c and the 301d of unit 200b, 200c and 200d to the fourth ventricle of second under the refrigeration mode is closed, the low pressure gas valve 302a of the first indoor unit 200a is closed, second to the fourth ventricle low pressure gas valve 302b, 302c and the 302d of unit 200b, 200c and 200d be opened.
Like this, be divided into first and second parts from the output refrigerant of the discharging of compressor 103a and 103b, first is by outdoor heat exchanger 101a and 101b, and in described outdoor heat exchanger, heat exchanges between output refrigerant and outdoor air.After this, the first of output refrigerant is provided for by outdoor expansion valve 102 and is operated in second in the refrigeration mode unit 200b, 200c and 200d to the fourth ventricle.After order is by second on/off valve 109 and second check-valves 110, be provided for the first indoor unit 200a that is operated in the heating mode from the second portion of the output refrigerant of compressor 103a and 103b discharging.
In above-mentioned state, outdoor control unit 120 is determined the aperture opening ratio of outdoor expansion valve 102 under the situation of considering to be operated in total work load that the first indoor unit 200a in the heating mode carried and be operated in the refrigeration mode by first to fourth indoor unit 200b, 200c and 200d total work load of being carried.Outdoor control unit 120 is controlled suitably to offer respectively and is operated in second under the refrigeration mode unit 200b, 200c and 200d and be operated in the amount of first and second parts of the output refrigerant of the first indoor unit 200a under the heating mode to the fourth ventricle like this.
The aperture opening ratio of determining outdoor expansion valve 102 will be elaborated in conjunction with Fig. 3 and Fig. 4 below with the operation of the amount of first and second parts of control output refrigerant.
Outdoor control unit 120 in total work load of considering to be carried with by the basis that is operated in the refrigeration mode by second total work load that unit 100b, 100c and 100d are carried to the fourth ventricle by the first indoor unit 100a that is operated in the heating mode on, control the aperture opening ratio of outdoor expansion valve 102.
For example, when total work load ratio of being carried by the first indoor unit 100a that is operated in the heating mode is operated in the refrigeration mode by second total work load that unit 100b, 100c and 100d are carried to fourth ventricle when big, the aperture opening ratio of outdoor expansion valve 102 is set to first level.In air-conditioning of the present invention, first level of aperture opening ratio of obtaining the outdoor expansion valve 102 of data as test is stored in the memory of outdoor control unit 120.The test of first level that is used for determining the aperture opening ratio of outdoor expansion valve 102 is 20 ℃ of (dry-bulb temperature)/15 ℃ (wet-bulb temperature) at indoor air temperature, and outdoor temperature be-5 ℃ of execution down.In test, first level of the aperture opening ratio of outdoor expansion valve 102 was set as 50% o'clock, be operated in second in the heating mode unit 100b, 100c and 100d to the fourth ventricle, comprise that the indoor unit that is operated in the heating mode is optimised with all indoor unit operating characteristics that are operated in the indoor unit in the refrigeration mode, shown in Fig. 3 mid point A.
As the another one example, total work load of being carried by the first indoor unit 100a in being operated in heating mode is unlike by being operated in total work load that second in the refrigeration mode unit 100b, 100c and 100d to fourth ventricle carried when big, and the aperture opening ratio of outdoor expansion valve 102 is set to second level.In air-conditioning of the present invention, second level of aperture opening ratio of obtaining the outdoor expansion valve 102 of data as test is stored in the memory of outdoor control unit 120.The test of second level that is used for determining the aperture opening ratio of outdoor expansion valve 102 is 27 ℃ of (dry-bulb temperature)/19.5 ℃ (wet-bulb temperature) at indoor air temperature, and carry out down 15 ℃ of (dry-bulb temperature)/10 of outside air temperature ℃ (wet-bulb temperature).In test, second level of the aperture opening ratio of outdoor expansion valve 102 was set as 35% o'clock, be operated in the service behaviour of unit 100b, 100c and 100d and all indoor unit 100a, 100b, 100c and the 100d to the fourth ventricle of second in the refrigeration mode, comprise indoor unit that is operated in the heating mode and the indoor unit that is operated in the refrigeration mode, the operating characteristics of these unit is optimised, shown in Fig. 4 mid point B.
Control with offer respectively be operated in refrigeration mode second to fourth ventricle unit 200b, 200c and 200d and be operated in the first and second part amounts of output refrigerant of the first indoor unit 200a in the heating mode after, outside air temperature that outdoor control unit 120 is relatively detected and default reference outdoor temperature.After this, outdoor control unit 120 is determined the demand compression volume of compressor 103a and 103b according to the temperature comparative result.For example, when the outside air temperature ratio that is detected was high with reference to outdoor temperature, outdoor control unit 120 drive compression machine 103a and 103b were to provide first compression volume.Yet when the outside air temperature that is detected was high unlike the reference outdoor temperature, outdoor control unit 120 drive compression machine 103a and 103b were to provide second compression volume littler than first compression volume.Like this, outdoor control unit 120 is according to the variation control compressor 103a of outside air temperature and the demand compression volume of 103b.
After the demand compression volume of compressor 103a and 103b is determined, outdoor control unit 120 compares pressure and the preset reference pressure from the output refrigerant of compressor 103a and 103b discharging, drive compression machine 103a and 103b are to provide the compression volume of demand simultaneously, and on the basis of pressure comparative result, the per minute rotating speed of control room exterior wing 113.For example, when the output refrigerant pressure was included between the upper and lower limit of reference pressure, outdoor control unit 120 continued the operation of compressor 103a and 103b and does not change.But when the output refrigerant pressure was higher than the upper limit of reference pressure, outdoor control unit 120 increased the per minute rotating speed of outdoor fan 113, thereby strengthened the heat exchanger effectiveness of outdoor heat exchanger 101a and 101b, and reduced to export refrigerant pressure thus.When the output refrigerant pressure than the lower limit of reference pressure hour, outdoor control unit 120 reduces the per minute rotating speed of outdoor fan 113, thereby reduces the heat exchanger effectiveness of outdoor heat exchanger 101a and 101b, and increases the pressure of output refrigerant thus.Like this, outdoor control unit 120 control from the pressure of the output refrigerant of compressor 103a and 103b discharging to reach reference pressure.
With reference to Fig. 5 A and Fig. 5 B the method that control has the air-conditioning of said structure is elaborated below.
Fig. 5 A and Fig. 5 B are the flow chart of method of control air-conditioning, and air-conditioning work is in the main integrated mode in refrigeration, and wherein the first indoor unit 200a is operated in the heating mode, second to the fourth ventricle unit 200b, 200c and 200d be operated in the refrigeration mode.In following explanation, for the convenience that illustrates, the indoor unit that is operated in the heating mode simply is called the heating mode indoor unit, and the indoor unit that is operated in the refrigeration mode is called as the refrigeration mode indoor unit.
When air-conditioning was opened, outdoor control unit 120 is the initialization air-conditioning in operation 10, according to the default control program with drive compression machine 103a with 103b and control different valves.
Carry out initialization in operation 10 after, in operation 12, first to fourth indoor control unit 210a, 210b, 210c and 210d export to mode signal outdoor control unit 120 respectively.In above-mentioned state, mode signal is represented the specified operation mode of first to fourth indoor unit 200a, 200b, 200c and 200d respectively, like this, outdoor control unit 120 is discerned the specified operation mode of first to fourth indoor unit 200a, 200b, 200c and 200d based on mode signal.
After this, outdoor control unit 120 determines in operation 14 whether the digital Nc of refrigeration mode indoor unit is bigger than the digital Nh of heating mode indoor unit.
When the digital Nc of refrigeration mode indoor unit was big unlike the digital Nh of heating mode indoor unit, air-conditioning was operated in as being heated to be in the specified operation mode of main integrated mode in operation 15.Be heated to be and no longer describe below the operating in of air-conditioning in the main integrated mode.
But, when the digital Nc of refrigeration mode indoor unit is bigger than the digital Nh of heating mode indoor unit, in operation 16, outdoor control unit 120 control cross valves 104 and to open second close/open valve 109 be main integrated mode operation with the refrigeration of carrying out air-conditioning.Therefore, output refrigerant from compressor 103a and 103b discharging is divided into first and second parts, and wherein first's order before offering refrigeration mode indoor unit 200b, 200c and 200d is passed through outdoor heat exchanger 101a and 101b and the outdoor expansion valve 102 as condenser.Second portion bypass from the output refrigerant of compressor 103a and 103b discharging arrives heating mode indoor unit 200a, and by outdoor heat exchanger 101a and 101b.
First to fourth indoor control unit 210a, 210b, 210c and 210d are based on the indoor air temperature that detects by indoor temperature transmitter 203a, 203b, 203c and 203d with reference to the difference of indoor temperature, calculate service load respectively by first to fourth indoor unit 200a, 200b, 200c and 200d carrying, in operation 18, the information data signal of the service load that expression is carried by first to fourth indoor unit 200a, 200b, 200c and 200d is exported to outdoor control unit 120.
Outdoor control unit 120 determines in operation 20 whether the total work load L Th that is carried by heating mode indoor unit 200a is bigger than the total operation load LTc that is carried by refrigeration mode indoor unit 200b, 200c and 200d.When will be by total work load L Th of heating mode indoor unit carrying when will be by total work load L Tc that refrigeration mode indoor unit 200b, 200c and 200d are carried big, outdoor control unit 120 be set to the first horizontal V1 with the aperture opening ratio V0 of outdoor expansion valve 102 in operation 22.But, when will be by total work load L Th of heating mode indoor unit 200a carrying when will be by total work load L Tc that refrigeration mode indoor unit 200b, 200c and 200d are carried big, outdoor control unit 120 be set to the first horizontal V2 with the aperture opening ratio V0 of outdoor expansion valve 102 in operation 24.In air-conditioning of the present invention, the first and second horizontal V1 and the V2 of aperture opening ratio that obtains the outdoor expansion valve 102 of data as test is stored in the memory of outdoor control unit 120.
After this, outdoor control unit 120 drives outdoor expansion valve 102 according to first or second default horizontal V1 or V2 in operation 26, control the aperture opening ratio V0 of outdoor expansion valve 102 like this.
After the aperture opening ratio V0 of outdoor expansion valve 102 control, outdoor control unit 120 is discerned detected outside air temperature based on the outdoor temperature signal of output in outdoor temperature sensor 108 in operation 28.
In operation 30, outdoor control unit 120 determines that whether detected outside air temperature Mo is than default reference outdoor temperature Mr height.In an embodiment of the present invention, preset reference outdoor temperature Mr is 0 ℃.
When the detected outdoor temperature Mo that is determined was higher than the preset reference outdoor temperature Mr in the operation 30, outdoor control unit 120 was set to the first compression volume CP1 with the demand compression volume CP of compressor 103a and 103b in operation 32.
After this, outdoor control unit 120 in operation 34 drive compression machine 103a and 103b so that the first compression volume CP1 to be provided.Outdoor control unit 120 also in operation 36 based on the pressure signal of output refrigerant of output in pressure sensor 105, discern detected output refrigerant pressure Pd.
After this, outdoor control unit 120 determines whether that in step 38 detected output refrigerant pressure Pd is included between the lower limit and upper limit P1 and P2 of first reference pressure.When detected output refrigerant pressure Pd lower than lower limit P1, perhaps than the upper limit P2 height of first reference pressure, the per minute rotating speed of outdoor control unit 120 control room exterior wing 113 in operation 40, refrigerant pressure is exported in control like this.Specifically, when detected output refrigerant pressure Pd is higher than the upper limit P2 of first reference pressure, outdoor control unit 120 increases the per minute rotating speed of outdoor fan 113, thereby strengthens the heat exchanger effectiveness of outdoor heat exchanger 101a and 101b, and has reduced the output refrigerant pressure thus.But, when detected output refrigerant pressure Pd is lower than the lower limit P1 of first reference pressure, outdoor control unit 120 reduces the per minute rotating speed of outdoor fan 113, reduces the heat exchanger effectiveness of outdoor heat exchanger 101a and 101b like this, and increases the output refrigerant pressure thus.In above-mentioned state, outdoor control unit 120 is based on the per minute rotating speed of the per minute tach signal control room exterior wing of exporting from rpm sensor 114 113.After the per minute rotating speed of the outdoor fan 113 of control operation 40, flow process is got back to operation 36.
When detected outside air temperature Mo was determined the preset reference outdoor temperature Mr that is not higher than in the operation 30, outdoor control unit 120 was set to the second compression volume CP2 littler than the first compression volume CP1 with the demand compression volume CP of compressor 103a and 103b in operation 42.Like this, outdoor control unit 120 is determined the demand compression volume CP of compressor 103a and 103b suitably according to the variation of outside air temperature, improves the service behaviour of air-conditioning thus.
After the demand compression volume CP with compressor 103a and 103b is set to the second compression volume CP2, outdoor control unit 120 in operation 44 drive compression machine 103a and 103b so that the second compression volume CP2 to be provided.Outdoor control unit 120 also in operation 46 based on output refrigerant pressure from pressure sensor 105 output, discern detected output refrigerant pressure Pd.After this, in operation 48, outdoor control unit 120 determines whether detected output refrigerant pressure Pd is included between the upper and lower limit P11 and P12 of second reference pressure.
When detected output refrigerant pressure Pd is lower than lower limit P11 or is higher than the upper limit P12 of second reference pressure, the per minute rotating speed of outdoor control unit 120 control room exterior wing 113 in operation 50, thereby control output refrigerant pressure.That is to say, when detected output refrigerant pressure Pd is higher than the upper limit P12 of second reference pressure, outdoor control unit 120 increases the per minute rotating speed of outdoor fan 113, thereby improves the heat exchange efficiency of outdoor heat exchanger 101a and 101b, and reduces the output refrigerant pressure thus.But, at detected output refrigerant pressure Pd during less than the lower limit P11 of second reference pressure, outdoor control unit 120 reduces the per minute rotating speed of outdoor fan 113, thereby reduces the heat exchange efficiency of outdoor heat exchanger 101a and 101b, and increases the output refrigerant pressure thus.After the per minute rotating speed of operation 50 control room exterior wings 113, flow process is got back to operation 46.
When in operation 38 or 48, when outdoor control unit 120 determines that detected output refrigerant pressure Pd are included between the lower limit of first reference pressure and upper limit P1 and the P2, in the time of perhaps between the lower limit of second reference pressure and upper limit P11 and P12, outdoor control unit 120 determines that in operation 52 refrigeration of air-conditioning is that main combined operation must be continued, flow process turns back to operation 12, and the refrigeration that continues air-conditioning like this is main combined operation.
But, determining the refrigeration of air-conditionings when outdoor control unit 120 is that main combined operation is must be stopped the time, outdoor control unit 120 stops the operation of compressor 103a and 103b, outdoor fan 113 and other driver part, thereby the refrigeration that stops air-conditioning is main combined operation.
From above-mentioned explanation, can obviously find out, the invention provides and a kind ofly have outdoor unit and a plurality of air-conditioning that is connected to the indoor unit of outdoor unit, and control described air-conditioning method of operating.In described air-conditioning and described control method, outdoor control unit response service load that indoor unit carries, control is supplied to the amount of the refrigerant of indoor unit from compressor, thereby suitably the variation by the service load that indoor unit carried is responded.Especially when air-conditioning work was in integrated mode, the some of them indoor unit was operated in refrigeration mode, and some other indoor unit is operated in heating mode simultaneously, and the refrigeration mode performance and the heating mode performance of indoor unit are optimised.Be operated in the air-conditioning quilt optimization in the integrated mode like this.In addition, the outdoor control unit of air-conditioning is determined the demand compression volume of compressor according to outside air temperature, and, respond the variation of outside air temperature like this and operate compressor optimally according to per minute rotating speed from the pressure control output fan of the output refrigerant of compressor discharge.
Although the preferred embodiments of the present invention are shown and illustrate that those of ordinary skill will be appreciated that and can change it that described scope is limited in claims and the equivalent thereof under the situation that does not depart from principle of the present invention and spirit.

Claims (17)

1. air-conditioning comprises:
Outdoor unit with compressor, outdoor heat exchanger, outdoor expansion valve and close/open valve;
The a plurality of indoor units that have a plurality of indoor heat exchangers respectively;
First refrigerant pipe by after the close/open valve, flows to a plurality of indoor units by described first refrigerant pipe from compressor from the refrigerant of compressor discharge;
Second refrigerant pipe after by outdoor heat exchanger and outdoor expansion valve, flows to a plurality of indoor units by described second refrigerant pipe from compressor from the refrigerant of compressor discharge;
Control module, described control module will be according to controlling the amount of refrigerant of the amount of refrigerant of first refrigerant pipe of flowing through and second refrigerant pipe of flowing through by the service load of a plurality of indoor unit carryings, wherein:
Control module control close/open valve and outdoor expansion valve are with control the flow through amount of refrigerant of first refrigerant pipe and the amount of refrigerant of second refrigerant pipe of flowing through.
2. air-conditioning according to claim 1 is characterized in that, close/open valve is connected to position between compressor and the outdoor heat exchanger at its inlet, and is connected to a plurality of indoor units in its outlet.
3. air-conditioning according to claim 1 is characterized in that outdoor expansion valve is connected to the outlet of outdoor heat exchanger.
4. air-conditioning according to claim 1 is characterized in that control module comprises:
Indoor control unit is used for providing with by the service load that a plurality of indoor unit carried that is operated in refrigeration mode or heating mode;
Outdoor control unit is used to respond the service load that indoor control unit provides, the aperture opening ratio of control close/open valve and outdoor expansion valve.
5. air-conditioning according to claim 4, it is characterized in that, outdoor control unit is determined the aperture opening ratio of outdoor expansion valve, with the service behaviour of optimization work at the indoor unit of refrigeration mode, and be in the main combination manipulation mode course of work in refrigeration, optimization comprises the indoor unit that is operated in the refrigeration mode and is operated in the service behaviour of all indoor units of the indoor unit in the heating mode, wherein said in operative combination operating process based on refrigeration, the major part of indoor unit is operated in the refrigeration mode, and the less important part of indoor unit is operated in the heating mode.
6. air-conditioning according to claim 4, it is characterized in that, a plurality of indoor units further comprise a plurality of indoor temperature transmitters respectively, and indoor control unit provides the service load by a plurality of indoor unit carryings according to indoor temperature around the indoor unit and the difference between the preset reference temperature.
7. air-conditioning according to claim 4, it is characterized in that, outdoor control unit will be by being operated in the total work load that indoor unit carried in the heating mode and being compared by the total work load that indoor unit carried that is operated in the refrigeration mode, and determine the aperture opening ratio of outdoor expansion valve according to the result of total operation load comparison.
8. air-conditioning comprises:
Outdoor unit, described outdoor unit have compressor, outdoor expansion valve, close/open valve, outdoor fan, outdoor temperature sensor and pressure sensor;
A plurality of indoor units, each indoor unit has indoor temperature transmitter and indoor heat exchanger;
First refrigerant pipe by after the close/open valve, flows to a plurality of indoor units by described first refrigerant pipe from compressor from the refrigerant of compressor discharge;
Second refrigerant pipe after by outdoor heat exchanger and outdoor expansion valve, flows to a plurality of indoor units by described second refrigerant pipe from compressor from the refrigerant of compressor discharge;
Indoor control unit, described indoor control unit provides the service load by a plurality of indoor units carryings according to the difference between the indoor temperature that indoor temperature transmitter detected of indoor unit and the default reference temperature;
Outdoor control unit, the described outdoor control unit response service load that indoor control unit provided, the aperture opening ratio of control close/open valve and outdoor expansion valve, and determine the demand compression volume of compressor according to the outdoor temperature that outdoor temperature sensor detected, and when compressor compression volume when operation according to demand, according to the rotating speed of the output refrigerant pressure control room exterior wing of the compressor that detects by pressure sensor.
9. air-conditioning according to claim 8 is characterized in that, outdoor control unit determines whether the demand compression volume of compressor uprises when the outdoor temperature that is detected by outdoor temperature sensor uprises.
10. air-conditioning according to claim 9 is characterized in that, the rotating speed that outdoor control unit can increase outdoor fan to be reducing the output refrigerant pressure of compressor, and the rotating speed that reduces outdoor fan is to increase the output refrigerant pressure of compressor.
11. air-conditioning according to claim 10 is characterized in that, outdoor unit also comprises the velocity sensor of the rotating speed of sensing chamber's exterior wing, and outdoor control unit is according to the rotating speed control room exterior wing of the outdoor fan that is detected by velocity sensor.
12. a method of controlling air-conditioning, described air-conditioning has outdoor unit, and described outdoor unit has compressor, outdoor heat exchanger, outdoor expansion valve and close/open valve; The a plurality of indoor units that have a plurality of indoor heat exchangers respectively; First refrigerant pipe by after the close/open valve, flows to a plurality of indoor units by described first refrigerant pipe from compressor from the refrigerant of compressor discharge; Second refrigerant pipe after by outdoor heat exchanger and outdoor expansion valve, flows to a plurality of indoor units by described second refrigerant pipe from compressor from the refrigerant of compressor discharge, and described method comprises step:
Calculating will be by the service load of a plurality of indoor unit carryings; With
According to will be by the service load of a plurality of indoor units carrying, control the flow through amount of refrigerant of first refrigerant pipe and the amount of refrigerant of second refrigerant pipe of flowing through,
Wherein evaluation work load and control amount of refrigerant comprise step:
Calculating refrigeration be in the main integrated mode operating process will by be operated in the refrigeration mode total work load that indoor unit carried and will be by the total work load that indoor unit carried that is operated in the heating mode, be in the main integrated mode operating process wherein in refrigeration, the major part of a plurality of indoor units will be operated in the refrigeration mode, and the less important part of a plurality of indoor units is operated in the heating mode;
Relatively by the total work load that indoor unit carried and the total work load that indoor unit carried that is operated under the heating mode that are operated under the refrigeration mode; With
According to the comparative result of total work load, the aperture opening ratio of control close/open valve and outdoor expansion valve.
13. method according to claim 12 is characterized in that, according to indoor temperature around the indoor unit and the difference between the default reference temperature, calculating will be by the service load of a plurality of indoor units carryings.
14. method according to claim 12, it is characterized in that, execution is to the control of the aperture opening ratio of outdoor expansion valve, with the service behaviour of the indoor unit of optimization work under refrigeration mode, and optimization is the service behaviour that comprises the indoor unit that is operated in the refrigeration mode in the main integrated mode operating process and be operated in all indoor units of the indoor unit in the heating mode in refrigeration.
15. method according to claim 12 further comprises step:
After the amount of control refrigerant, detect outdoor temperature by the outdoor temperature sensor that is arranged in the outdoor unit; With
According to the demand compression volume of determining compressor by the outdoor temperature that outdoor temperature sensor detected.
16. method according to claim 15 further comprises step:
When compressor compression volume is according to demand worked, detect the output refrigerant pressure of compressor; With
According to the output refrigerant pressure of compressor, control is arranged on the rotating speed of the outdoor fan in the output unit.
17. method according to claim 16 is characterized in that, the control of the rotating speed of outdoor fan comprises step:
The output refrigerant pressure and the default reference pressure that compare compressor; With
When the output refrigerant pressure of compressor is bigger than preset reference value, increases the rotating speed of outdoor fan, and hour reduce the rotating speed of outdoor fan at the output refrigerant pressure of compressor than preset reference pressure.
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EP1526341B1 (en) 2006-07-12

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