CN102165272A - Multiple air conditioner - Google Patents

Multiple air conditioner Download PDF

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Publication number
CN102165272A
CN102165272A CN2010800027127A CN201080002712A CN102165272A CN 102165272 A CN102165272 A CN 102165272A CN 2010800027127 A CN2010800027127 A CN 2010800027127A CN 201080002712 A CN201080002712 A CN 201080002712A CN 102165272 A CN102165272 A CN 102165272A
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CN
China
Prior art keywords
electromagnetic switch
premises station
capillary
switch valve
air conditioner
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Granted
Application number
CN2010800027127A
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Chinese (zh)
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CN102165272B (en
Inventor
安田达弘
五十住晋一
三苫惠介
前野政司
渡边聪
上藤阳一
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Mitsubishi Heavy Industries Air Conditioning and Refrigeration Systems Corp
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Mitsubishi Heavy Industries Ltd
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Publication of CN102165272A publication Critical patent/CN102165272A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F25B2313/005—Outdoor unit 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two 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
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • 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
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/06—Damage
    • 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
    • F25B2700/19—Pressures
    • F25B2700/191—Pressures near an expansion valve

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

Abstract

A liquid head pressure applied to an electronic expansion valve disposed on the upstream side (inlet) of an indoor heat exchanger is reduced to prevent failure in opening/closing (operation) of the electronic expansion valve. Disclosed is a multiple air conditioner (1) comprised of a single outdoor unit (2) and a plurality of indoor units (3) which are disposed downstream of the outdoor unit (2) and are connected to the outdoor unit (2) via a refrigerant pipe (8). The outdoor unit (2) is comprised of a decompression mechanism (7) juxtaposed to the refrigerant pipe (8), wherein three electromagnetic open/close valves (22, 23, 24) and three capillary tubes (25, 26, 27) having different lengths are provided in the vicinity of the outlet when a cooling operation is performed, and the electromagnetic open/close valves (22, 23, 24) are connected to the capillary tubes (25, 26, 27), respectively.

Description

Multi-connected air conditioner
Technical field
The present invention relates to multi-connected air conditioner, specifically relate at off-premises station and be arranged at the multi-connected air conditioner that produces the potential difference of liquid refrigerant between the indoor set below this off-premises station.
Background technology
As at off-premises station be arranged at the multi-connected air conditioner that produces the potential difference of liquid refrigerant between the indoor set below this off-premises station, known for example have that (inlet) disposes electric expansion valve (for example with reference to patent documentation 1) before indoor heat converter.
Patent documentation 1:(Japan) spy opens the 2008-185292 communique
Yet, under the situation that this multi-connected air conditioner is arranged at skyscraper etc., sometimes the difference of height of off-premises station and indoor set can be near 100m, in this case, in the above-mentioned patent documentation 1 in the disclosed multi-connected air conditioner (refrigerating plant), liquid level differential pressure (pressure that the potential difference of liquid refrigerant causes) that can be excessive to the electronic expansion valve action might cause electric expansion valve to open and close.
Summary of the invention
The present invention In view of the foregoing proposes, its purpose is, a kind of multi-connected air conditioner is provided, can reduces, can prevent that the switch of electric expansion valve is bad (it is bad to work) being disposed at the liquid level differential pressure of the electronic expansion valve action of (inlet) before the indoor heat converter.
The present invention adopts following means for solving above-mentioned problem.
A first aspect of the present invention provides a kind of multi-connected air conditioner, possess: an off-premises station and many indoor sets that are arranged at this off-premises station below and are connected with described off-premises station via refrigerant piping, wherein, be provided with the mechanism of decompressor near the outlet when the cooling operation of described off-premises station, the described mechanism of decompressor constitutes, possess: at least two electromagnetic switch valves and at least two capillaries, disposed with respect to described refrigerant piping with the combination that the capillary that is connected with this electromagnetic switch valve constitutes side by side by an electromagnetic switch valve.
In addition, a second aspect of the present invention provides a kind of multi-connected air conditioner, possess: an off-premises station and many indoor sets that are arranged at this off-premises station below and are connected with described off-premises station via refrigerant piping, wherein, be provided with the mechanism of decompressor near the outlet when the cooling operation of described off-premises station, the described mechanism of decompressor constitutes, possess: three electromagnetic switch valves and three different capillaries of length, disposed with respect to described refrigerant piping with the combination that a capillary that is connected with this electromagnetic switch valve constitutes side by side by an electromagnetic switch valve.
In the multi-connected air conditioner of a first aspect of the present invention or second aspect, the following setting of length capillaceous, for example, effect of easing stress when opening all electromagnetic switch valves and using all capillaries is made as " 1 ", then only open with the longest capillary (hereinafter referred to as " long capillary ".) electromagnetic switch valve that connects and effect of easing stress when only using the longest capillary be " 1/10 ", only open and the shortest capillary (hereinafter referred to as " short capillary ".) electromagnetic switch valve that connects and effect of easing stress when only using short capillary is " 6/10 ", only open with shorter than long capillary and than the long capillary of short capillary (hereinafter referred to as " intermediate length capillary ".) electromagnetic switch valve that connects and effect of easing stress when only using this capillary is " 3/10 ".
And, effect of easing stress when opening the electromagnetic switch valve that is connected with long capillary and intermediate length capillary and using long capillary and intermediate length capillary is " 4/10 ", effect of easing stress when opening the electromagnetic switch valve that is connected with long capillary and short capillary and using long capillary and short capillary is " 7/10 ", and the effect of easing stress when opening the electromagnetic switch valve that is connected with intermediate length capillary and short capillary and using the intermediate length capillary to reach short capillary is " 9/10 ".
That is, switch, just can utilize several modes to reduce pressure from off-premises station to indoor set that supply with the liquid refrigerant of (importing) from as long as will open the combination (pattern) of electromagnetic switch valve.
Thus, can reduce, can prevent that the switch of electric expansion valve is bad (it is bad to work) being disposed at the liquid level differential pressure of the electronic expansion valve action of (inlet) before the indoor heat converter.
In the multi-connected air conditioner of described first aspect or second aspect, more preferably, described electromagnetic switch valve respectively with make these solenoid electric valves open the controller of closing separately to be electrically connected, described controller, near the outlet during according to the cooling operation of described off-premises station refrigerant pressure, and constitute the rotating speed of the compressor of described off-premises station, described electromagnetic switch valve is opened closed.
According to such multi-connected air conditioner, near the outlet during according to the cooling operation of off-premises station refrigerant pressure, and constitute the rotating speed of the compressor of off-premises station, instantaneous the opening of electromagnetic switch valve closed, will maintain optimum pressure the liquid level differential pressure that is disposed at indoor heat converter electronic expansion valve action before.
Thus, can prevent to prevent more reliably that to being disposed at the indoor heat converter excessive liquid level differential pressure of electronic expansion valve action before the switch of electric expansion valve is bad (it is bad to work).
The invention effect
According to multi-connected air conditioner of the present invention, have following effect, that is, can reduce being disposed at the liquid level differential pressure of the electronic expansion valve action of (inlet) before the indoor heat converter, can prevent that the switch of electric expansion valve is bad (it is bad to work).
Description of drawings
Fig. 1 is the summary system diagram of the multi-connected air conditioner of an embodiment of the present invention.
Fig. 2 is the figure that wants portion to amplify with Fig. 1.
Fig. 3 is the chart that is used to illustrate length capillaceous and effect of easing stress thereof.
Fig. 4 A be will be in controller as the chart of the data visualization of database storage, be the chart when being higher than setting by the measured value that high pressure sensor is measured.
Fig. 4 B be will be in controller as the chart of the data visualization of database storage, be the chart when being lower than setting by the measured value that high pressure sensor is measured.
Fig. 5 is the flow chart that is used to make controller work.
Description of symbols
The 1-multi-connected air conditioner
The 2-off-premises station
The 3-indoor set
The 7-mechanism of decompressor
The 8-refrigerant piping
The 22-electromagnetic switch valve
The 23-electromagnetic switch valve
The 24-electromagnetic switch valve
The 25-capillary
The 26-capillary
The 27-capillary
The 28-controller
The specific embodiment
Below, an embodiment of multi-connected air conditioner of the present invention is described with reference to Fig. 1～Fig. 5.
Fig. 1 is the summary system diagram of the multi-connected air conditioner of present embodiment, Fig. 2 is the figure after the portion that wants of Fig. 1 is amplified, Fig. 3 is the chart that is used to illustrate length capillaceous and effect of easing stress thereof, Fig. 4 A, Fig. 4 B are with at the chart of controller as the data visualization of database storage, Fig. 4 A is the measured value measured by the high pressure sensor chart when higher than setting, Fig. 4 B is the measured value measured by the high pressure sensor chart when lower than setting, and Fig. 5 is the flow chart that is used to make controller work.
As shown in Figure 1, the multi-connected air conditioner 1 of present embodiment possesses: off-premises station 2 and Duo Tai (for example two) indoor set 3.
Off-premises station 2 for example is located on the roof of skyscraper, possesses: compressor 4, cross valve 5, outdoor heat converter 6, outdoor fan (not shown) and the mechanism of decompressor 7.
Indoor set 3 for example is located at apart from the roof that is provided with off-premises station 2 in the room of the floor (layer) of low 100m, and it possesses: indoor heat converter (not shown) and indoor fan (not shown).
Off-premises station 2 is connected via refrigerant piping 8 with indoor set 3, is connected with fluid operated valve 9 midway what be connected to refrigerant piping 8 between the mechanism of decompressor 7 and the indoor set 3.Fluid operated valve 9 is disposed near off-premises station 2 (outlet), at the high pressure sensor that the measuring tube internal pressure is installed 10 that is connected to the refrigerant piping 8 between the mechanism of decompressor 7 and the fluid operated valve 9 midway.High pressure sensor 10 is electrically connected with controller 28 described later, and the measured value of being measured by high pressure sensor 10 is (hereinafter referred to as " high pressure sensor value ".) be converted into the signal of telecommunication and export to controller 28.
In addition, be connected with electric expansion valve 11 midway what be connected to refrigerant piping 8 between fluid operated valve 9 and the indoor set 3.Electric expansion valve is (hereinafter referred to as " EEV ".) 11 be disposed near (inlet) of each indoor set 3.
As shown in Figure 2, the mechanism of decompressor 7 possesses: a check-valves 21; A plurality of (in the present embodiment being three) electromagnetic switch valve 22,23,24; Many (in the present embodiment being three) capillaries 25,26,27 that length is different.
Be connected with capillary 25 at electromagnetic switch valve 22, be connected with capillary 26, be connected with capillary 27 at electromagnetic switch valve 24 at electromagnetic switch valve 23.In addition, check-valves 21, electromagnetic switch valve 22 and capillary 25, electromagnetic switch valve 23 and capillary 26, electromagnetic switch valve 24 and capillary 27 dispose side by side via refrigerant piping 8.
Electromagnetic switch valve 23,24,25 is electrically connected with controller 28 respectively, closes by controlled the opening of the signal of telecommunication of slave controller 28 outputs.
In addition, check-valves 21 is installed in and allows from fluid operated valve 9 flowing but stop from the direction that flow of outdoor heat converter 6 to fluid operated valve 9 to outdoor heat converter 6.
Wherein, capillary 25,26, the following setting of 27 length, for example, all electromagnetic switch valves 22 will be opened, 23,24 and use all capillaries 25,26,27 o'clock effect of easing stress is made as " 1 " (with reference to " 7 " hurdle among Fig. 3), then only open electromagnetic switch valve 22 and effect of easing stress when only using capillary 25 is " 1/10 " (with reference to " 1 " hurdle among Fig. 3), only open electromagnetic switch valve 23 and effect of easing stress when only using capillary 26 is " 3/10 " (with reference to " 2 " hurdle among Fig. 3), only open electromagnetic switch valve 24 and effect of easing stress when only using capillary 27 is " 6/10 " (with reference to " 4 " hurdle among Fig. 3).
And, opening electromagnetic switch valve 22,23 and using 25,26 o'clock effect of easing stress of capillary is " 4/10 " (with reference to " 3 " hurdle among Fig. 3), opening electromagnetic switch valve 22,24 and using 25,27 o'clock effect of easing stress of capillary is " 7/10 " (with reference to " 5 " hurdle among Fig. 3), and opening electromagnetic switch valve 23,24 and using 26,27 o'clock effect of easing stress of capillary is " 9/10 " (with reference to " 6 " hurdle among Fig. 3).
In controller 28, as database storage (accumulating) data with the chart dataization shown in Fig. 4 A and Fig. 4 B are arranged, controller 28 opens electromagnetic switch valve 22,23,24 according to flow chart shown in Figure 5 and cuts out, and reconciles the pressure of (inlet) before the EEV11.
Promptly, in the high pressure sensor value of being measured by high pressure sensor 10 is more than the setting, and compressor rotary speed (rotating speed of compressor 4) is under the following situation of setting, controller 28, according to making the pressure of (inlet) before the EEV11 reach the mode of desirable pressure, select employed electromagnetic switch valve 22,23,24 and capillary 25,26,27 according to the database that is stored in this controller 28, electromagnetic switch valve 22,23,24 is opened closed.
For example, in the high pressure sensor value of being measured by high pressure sensor 10 is more than the setting, and compressor rotary speed is below the setting, and the high pressure sensor value of this moment is than another setting (second setting) height, and compressor rotary speed is under the highest regional interior situation that is stored in controller 28, then open electromagnetic switch valve 22,24, use capillary 25,27.
In addition, in the high pressure sensor value of being measured by high pressure sensor 10 is more than the setting, and compressor rotary speed is below the setting, and the high pressure sensor value of this moment is lower than another setting (second setting), and compressor rotary speed is under the interior situation of lowermost extent, only open electromagnetic switch valve 23, only use capillary 26.
Multi-connected air conditioner 1 according to present embodiment, capillary 25,26, the following setting of 27 length, for example, all electromagnetic switch valves 22 will be opened, 23,24 and use all capillaries 25,26,27 o'clock effect of easing stress is made as " 1 ", then only open the electromagnetic switch valve 22 that is connected with the longest capillary 25 and effect of easing stress when only using capillary 25 is " 1/10 ", only open the electromagnetic switch valve 24 that is connected with the shortest capillary 27 and effect of easing stress when only using capillary 27 is made as " 6/10 ", only open the electromagnetic switch valve 23 that is connected with shorter than capillary 25 and longer capillary 26 and effect of easing stress when only using capillary 26 is made as " 3/10 " than capillary 27.
And, open the electromagnetic switch valve 22,23 that is connected with capillary 25,26 and use 25,26 o'clock effect of easing stress of capillary to be " 4/10 ", open the electromagnetic switch valve 22,24 that is connected with capillary 25,27 and use 25,27 o'clock effect of easing stress of capillary to be " 7/10 ", open the electromagnetic switch valve 23,24 that is connected with capillary 26,27 and use 26,27 o'clock effect of easing stress of capillary to be " 9/10 ".
That is, the combination (pattern) that only will open electromagnetic switch valve 22,23,24 is switched, and just can utilize several modes to reduce pressure from off-premises station 2 to indoor set 3 that supply with the liquid refrigerant of (importing) from.
Thus, can reduce acting on the liquid level differential pressure that is configured in the EEV11 of (inlet) before the indoor heat converter, can prevent that opening of EEV11 from closing bad (it is bad to work).
In addition, electromagnetic switch valve 22,23,24 respectively with make these solenoid electric valves 22,23,24 open the controller 28 of closing separately to be electrically connected, controller 28 constitutes, near the refrigerant pressure the outlet during according to the cooling operation of off-premises station 2, and the rotating speed that constitutes the compressor 4 of off-premises station 2 electromagnetic switch valve 22,23,24 is opened close.
Promptly, near the outlet during according to the cooling operation of off-premises station 2 refrigerant pressure, and the rotating speed that constitutes the compressor 4 of off-premises station 2 electromagnetic switch valve 22,23,24 instantaneous opening are closed, will act on the liquid level differential pressure that is configured in the EEV11 before the indoor heat converter and maintain best pressure.
Thus, can prevent, can prevent more reliably that opening of EEV11 from closing bad (it is bad to work) for the excessive liquid level differential pressure of EEV11 effect that is disposed at before the indoor heat converter.
In addition, the invention is not restricted to above-mentioned embodiment, can carry out various changes, distortion without departing from the spirit and scope of the present invention.
For example, in the above-described embodiment, enumerate and possess three electromagnetic switch valves 22,23,24; And the mechanism of decompressor 7 of different three capillaries 25,26,27 of length is illustrated as a concrete example.But, the invention is not restricted to this, the mechanism of decompressor 7 also can be: possess three electromagnetic switch valves, three the capillaceous structures identical with length, possess two electromagnetic switch valves, two the capillaceous structures different with length, possess two electromagnetic switch valves, two the capillaceous structures identical with length, possess electromagnetic switch valve more than four the capillaceous structure four or more different with length, possess electromagnetic switch valve the capillaceous structure four or more identical with length more than four.

Claims (3)

1. multi-connected air conditioner possesses: an off-premises station and many indoor sets that are arranged at this off-premises station below and are connected with described off-premises station via refrigerant piping, wherein,
Be provided with the mechanism of decompressor near the outlet when the cooling operation of described off-premises station, the described mechanism of decompressor constitutes, possess: at least two electromagnetic switch valves and at least two capillaries, disposed with respect to described refrigerant piping with the combination that the capillary that is connected with this electromagnetic switch valve constitutes side by side by an electromagnetic switch valve.
2. multi-connected air conditioner possesses: an off-premises station and many indoor sets that are arranged at this off-premises station below and are connected with described off-premises station via refrigerant piping, wherein,
Be provided with the mechanism of decompressor near the outlet when the cooling operation of described off-premises station, the described mechanism of decompressor constitutes, possess: three electromagnetic switch valves and three different capillaries of length, disposed with respect to described refrigerant piping with the combination that a capillary that is connected with this electromagnetic switch valve constitutes side by side by an electromagnetic switch valve.
3. multi-connected air conditioner as claimed in claim 1 or 2, wherein,
Described electromagnetic switch valve respectively with make these solenoid electric valves open the controller of closing separately to be electrically connected, near the outlet of described controller during refrigerant pressure, and constitute the rotating speed of the compressor of described off-premises station, described electromagnetic switch valve is opened closed according to the cooling operation of described off-premises station.
CN201080002712.7A 2009-03-30 2010-03-24 Multiple air conditioner Active CN102165272B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2009083370A JP5489507B2 (en) 2009-03-30 2009-03-30 Multi-type air conditioner
JP083370/09 2009-03-30
PCT/JP2010/055063 WO2010113719A1 (en) 2009-03-30 2010-03-24 Multiple air conditioner

Publications (2)

Publication Number Publication Date
CN102165272A true CN102165272A (en) 2011-08-24
CN102165272B CN102165272B (en) 2014-10-29

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Application Number Title Priority Date Filing Date
CN201080002712.7A Active CN102165272B (en) 2009-03-30 2010-03-24 Multiple air conditioner

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Country Link
EP (1) EP2416090A4 (en)
JP (1) JP5489507B2 (en)
CN (1) CN102165272B (en)
WO (1) WO2010113719A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635926A (en) * 2012-04-26 2012-08-15 青岛海尔空调电子有限公司 Air conditioning system and pressure adjusting method for same
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CN107091498A (en) * 2017-05-11 2017-08-25 广东志高暖通设备股份有限公司 A kind of air-conditioner control system and multitube group air-conditioning
CN107284193A (en) * 2016-03-31 2017-10-24 杭州三花研究院有限公司 Air-conditioning system, the control system of the air-conditioning system and control method
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CN102635926A (en) * 2012-04-26 2012-08-15 青岛海尔空调电子有限公司 Air conditioning system and pressure adjusting method for same
CN102635927A (en) * 2012-04-26 2012-08-15 青岛海尔空调电子有限公司 Pressure adjusting device and method for air conditioning systems
CN102635927B (en) * 2012-04-26 2018-05-11 青岛海尔空调电子有限公司 Pressure regulation device and method for air-conditioning system
CN102635926B (en) * 2012-04-26 2018-08-24 青岛海尔空调电子有限公司 Air-conditioning system and pressure method of adjustment for air-conditioning system
WO2015149413A1 (en) * 2014-03-31 2015-10-08 广东科龙空调器有限公司 Capillary tube throttling device and refrigerating apparatus
CN105091425A (en) * 2014-04-18 2015-11-25 广东科龙空调器有限公司 Capillary throttling device and refrigeration device
CN104456739A (en) * 2014-12-26 2015-03-25 珠海格力电器股份有限公司 Air conditioning system and control method
CN104456739B (en) * 2014-12-26 2017-03-01 珠海格力电器股份有限公司 Air conditioning system and control method
CN107284193A (en) * 2016-03-31 2017-10-24 杭州三花研究院有限公司 Air-conditioning system, the control system of the air-conditioning system and control method
CN107091498A (en) * 2017-05-11 2017-08-25 广东志高暖通设备股份有限公司 A kind of air-conditioner control system and multitube group air-conditioning
CN107091498B (en) * 2017-05-11 2020-03-17 广东志高暖通设备股份有限公司 Air conditioner control system and multi-tube set air conditioner
CN111895671A (en) * 2019-05-05 2020-11-06 维谛技术有限公司 Air conditioning system

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