CN104154673A - Refrigeration method and system for three-pipe heat recovery varied refrigerant volume air-conditioning system - Google Patents

Refrigeration method and system for three-pipe heat recovery varied refrigerant volume air-conditioning system Download PDF

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Publication number
CN104154673A
CN104154673A CN201410440777.XA CN201410440777A CN104154673A CN 104154673 A CN104154673 A CN 104154673A CN 201410440777 A CN201410440777 A CN 201410440777A CN 104154673 A CN104154673 A CN 104154673A
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China
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pipe
switching device
indoor
output
medium switching
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CN201410440777.XA
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CN104154673B (en
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刘红斌
王峰
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Guangdong Chigo Heating and Ventilation Equipment Co Ltd
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Guangdong Chigo Heating and Ventilation Equipment Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a refrigeration method and system for a three-pipe heat recovery varied refrigerant volume air-conditioning system. The heat recovery characteristics of the three-pipe heat recovery varied refrigerant volume air conditioner are made full use of with the lowest energy consumption input of compressors. The heat exchange efficiency of outdoor unit heat exchangers is made full use of, and any one of the outdoor air cooling heat exchangers is selected freely to serve as a condenser or an evaporator in use according to the control requirement of the system. High pressure, low pressure, ventilating temperature, air return temperature and coolant distribution of the system are ensured by the three-pipe heat recovery varied refrigerant volume air-conditioning system at any environment temperatures and in any indoor unit starting modes through adjustment of outdoor fans and four-way valves, and high temperature and high pressure risks and liquid return risks of the system are reduced so as to ensure reliability of the system. The operation effect of heating and refrigerating of indoor units is ensured through reasonable distribution of a system coolant, and the aims of sufficient heat recovery and energy saving are achieved.

Description

A kind of refrigerating method of Three-pipe heat recovery multi-connected machine system and system
Technical field
The present invention relates to air-conditioning technical field, relate in particular to a kind of refrigerating method and system of Three-pipe heat recovery multi-connected machine system.
Background technology
Existing heating or refrigeration system, the air cooling heat exchanger of off-premises station or all make evaporimeter and use, or all make condenser and use.When cryogenic refrigeration, the air cooling heat exchanger of off-premises station is all used as condenser, may make like this condensation effect very good, and evaporimeter can not evaporate completely, thereby causes system to return liquid refrigerants, when serious, causes compressor to burn.When high temperature heats, compressor exhaust temperature is high, at this moment system pressure also can be very high, and off-premises station air cooling heat exchanger is all used as evaporimeter, evaporation effect is very good, causes suction temperature very high, and the words that suction temperature is high cause again delivery temperature high, so vicious circle is gone down, and has a strong impact on the service life of whole system.
In order to adapt to user's needs, reach the refrigeration of refrigeration indoor set simultaneously, common way is the output of compressor to be strengthened to the refrigeration of the interior machine that simultaneously guarantees to freeze, but the high-low pressure pressure of system and row's suction temperature cause improper under this condition, to cause the too high or too low and system of system compresses machine pressure ratio to return liquid risk, affect the service life of whole system.
Summary of the invention
The embodiment of the present invention provides a kind of refrigerating method of Three-pipe heat recovery multi-connected machine system, comprising:
S1: open the first electric expansion valve and the second electric expansion valve, turn-off the first cross valve and the second cross valve simultaneously, open the first magnetic valve, close the second magnetic valve;
S2: the low pressure gas pipe input of the first cooling medium switching device and the second cooling medium switching device and the conducting of tracheae output, and the high-pressure air pipe input of the first cooling medium switching device and the second cooling medium switching device and tracheae output are closed;
S3: a refrigerant part for the HTHP that compressor bank is discharged after the first cross valve to the first air cooling heat exchanger condensation by the first electric expansion valve reducing pressure by regulating flow, another part after the second cross valve to the second air cooling heat exchanger condensation by the second electric expansion valve reducing pressure by regulating flow;
S4: two air cooling heat exchangers are shunted through liquid pipe stop valve the liquid refrigerants after reducing pressure by regulating flow by liquid pipe branch pipe, shunting is to the first cooling medium switching device and the second cooling medium switching device;
S5: be diverted to the liquid refrigerants of the first indoor-unit cooling-medium switching device shifter, carry out evaporation endothermic by the first indoor set being connected with the first indoor-unit cooling-medium switching device shifter;
Be diverted to the liquid refrigerants of the second indoor-unit cooling-medium switching device shifter, by the second indoor set being connected with the second indoor-unit cooling-medium switching device shifter, carry out evaporation endothermic;
S6: the liquid refrigerants after the first indoor set and the second indoor set evaporation endothermic collaborates by low pressure gas pipe branch pipe, through low pressure gas pipe stop valve, enters gas-liquid separator;
S7: gas-liquid separator carries out the liquid refrigerants after evaporation endothermic to be transmitted back to compressor bank after gas-liquid separation, completes kind of refrigeration cycle.
A kind of Three-pipe heat recovery multi-connected machine system, comprise: for the compressor of cold-producing medium is provided to system, the first air cooling heat exchanger and for giving the first outdoor fan of described the first air cooling heat exchanger enhanced heat exchange, the second air cooling heat exchanger and for giving the second outdoor fan of described the second air cooling heat exchanger enhanced heat exchange, at least two indoor sets with identical with described indoor set quantity for controlling its working method that is connected indoor set for refrigeration or the cooling medium switching device that heats, liquid pipe stop valve, low pressure gas pipe stop valve, high-pressure air pipe stop valve, be connected with described the first air cooling heat exchanger for controlling described the first air cooling heat exchanger as condenser or the first cross valve of using as evaporimeter, be connected with described the second air cooling heat exchanger for controlling described the second air cooling heat exchanger as condenser or the second cross valve of using as evaporimeter, the first magnetic valve and the second magnetic valve,
The quantity of described compressor is at least two, described in each, compressor can provide cold-producing medium to system simultaneously, and described compressor forms compressor bank, and the output of compressor described in each and air return end are accumulated to the output of compressor bank and the air return end of compressor bank;
Described indoor set is provided with the gentle pipe end of liquid pipe end;
Described cooling medium switching device is provided with liquid pipe input, liquid pipe output, low pressure gas pipe input, tracheae output, high-pressure air pipe input;
The liquid pipe end of described indoor set is connected with the liquid pipe output of described indoor-unit cooling-medium switching device shifter, and the tracheae end of described indoor set is connected with the tracheae output of described indoor-unit cooling-medium switching device shifter;
The liquid pipe input of described indoor-unit cooling-medium switching device shifter is connected with described liquid pipe stop valve;
The low pressure gas pipe input of described indoor-unit cooling-medium switching device shifter is connected with described low pressure gas pipe stop valve;
The high-pressure air pipe input of described indoor-unit cooling-medium switching device shifter is connected with described high-pressure air pipe stop valve;
The input of the first end of the first end of described the first cross valve, described the second cross valve and described the second magnetic valve is connected with described compressor bank output jointly;
The second end of described the first cross valve is connected with described the first air cooling heat exchanger;
The output of the 3rd end of described the first cross valve and the 3rd end of the 4th end, described the second cross valve and the 4th end, the first magnetic valve is connected with described compressor bank air return end simultaneously;
The second end of described the second cross valve is connected with described the second air cooling heat exchanger;
The input of described the first magnetic valve is connected with described low pressure gas pipe stop valve;
The output of described the second magnetic valve is connected with described high-pressure air pipe stop valve.
Preferably, also comprise the first electric expansion valve;
Described the first air cooling heat exchanger is connected with described liquid pipe stop valve by described the first electric expansion valve, and described the first electric expansion valve is for controlling the cold medium flux that flows through described the first air cooling heat exchanger.
Preferably, also comprise the second electric expansion valve;
Described the second air cooling heat exchanger is connected with described liquid pipe stop valve by described the second electric expansion valve, and described the second electric expansion valve is for controlling the cold medium flux that flows through described the second air cooling heat exchanger.
Preferably, also comprise the gas-liquid separator for carrying out gas-liquid separation to flowing into the refrigerant of described compressor bank;
Described gas-liquid separator is provided with entrance point and the port of export;
The entrance point of described gas-liquid separator is communicated with jointly with described the first cross valve, described the second cross valve and described the first magnetic valve; The described gas-liquid separator port of export is connected with described compressor bank air return end.
Preferably, also comprise for detection of the low-pressure sensor of pressure size between described gas-liquid separator output and described compressor bank air return end with for according to the pressure size detecting, control the low tension switch that between described gas-liquid separator output and described compressor bank air return end, pipeline is opened and turn-offed;
Described low tension switch and described low-pressure sensor are arranged between described gas-liquid separator output and described compressor bank air return end.
Preferably, also comprise oil eliminator; Described oil eliminator is provided with input, refrigerant output and oily output;
Described oil eliminator input is connected with the output of described compressor bank, and the refrigerant output of described oil eliminator is connected with described the first cross valve, described the second cross valve and described the second magnetic valve;
The oily output of described oil eliminator is provided with the capillary being communicated with described compressor bank air return end;
Described capillary is for carrying out separated to flowing out the high-pressure gaseous refrigerant of compressor bank with refrigerator oil, high-pressure gaseous refrigerant is discharged by the refrigerant output of described oil eliminator, capillary by isolated refrigerator oil by described oil eliminator oil output flows back to described compressor bank, and described capillary is for controlling the oil drain quantity of described oil eliminator.
Preferably, the refrigerant output that is provided with high-pressure switch and high-pressure sensor or described oil eliminator between the output of described compressor bank and described oil eliminator entrance point is provided with high-pressure switch and high-pressure sensor;
Described high-pressure sensor is for detection of the pressure size of the output of described compressor bank; Described high-pressure switch, for according to the pressure size detecting, is controlled described compressor bank opening and closing.
Preferably, comprising: the first indoor set and the second indoor set and the first cooling medium switching device and described the second cooling medium switching device that are connected with described the second indoor set with described the first indoor set respectively;
Also comprise: liquid pipe branch pipe, low pressure gas pipe branch pipe, high-pressure air pipe branch pipe;
The liquid pipe output of described the first indoor-unit cooling-medium switching device shifter is connected with the liquid pipe end of described the first indoor set, and the liquid pipe input of described the first indoor-unit cooling-medium switching device shifter is connected with described liquid pipe stop valve by described liquid pipe branch pipe; The low pressure gas pipe output of the first indoor-unit cooling-medium switching device shifter is connected with the tracheae end of described the first indoor set; The tracheae input of the first indoor-unit cooling-medium switching device shifter is connected with described off-premises station low pressure gas pipe stop valve by low pressure gas pipe branch pipe; The high-pressure air pipe input of the first indoor-unit cooling-medium switching device shifter is connected with the high-pressure air pipe stop valve of described off-premises station by described high-pressure air pipe branch pipe;
The liquid pipe output of described the second indoor-unit cooling-medium switching device shifter is connected with the liquid pipe end of described the second indoor set, and the liquid pipe input of described the second indoor-unit cooling-medium switching device shifter is connected with the liquid pipe stop valve of described off-premises station by described liquid pipe branch pipe; The tracheae output of the second indoor-unit cooling-medium switching device shifter is connected with the tracheae end of described indoor set; The low pressure gas pipe input of the first indoor-unit cooling-medium switching device shifter is connected with the low pressure gas pipe stop valve of described off-premises station by low pressure gas pipe branch pipe; The high-pressure air pipe input of the first indoor-unit cooling-medium switching device shifter is connected with the high-pressure air pipe stop valve of described off-premises station by high-pressure air pipe branch pipe.
Preferably, described compressor adopts frequency-changeable compressor, or constant speed compressor, or digital compressor.
As can be seen from the above technical solutions, the present invention has the following advantages:
The present invention is by replacing two air cooling heat exchangers an original air cooling heat exchanger, make full use of the recuperation of heat feature of Three-pipe heat recovery multi-connected machine, with minimum energy consumption of compressor input, making full use of the heat exchange efficiency of outdoor unit heat exchanger and needing freely to select any one outdoor air cooling heat exchanger according to the control of system is to use or evaporimeter use as condenser, and the adjusting by outdoor fan makes Three-pipe heat recovery multi-connected machine system under any environment temperature and any interior machine open mode, guarantee that system high pressure and low pressure and delivery temperature and suction temperature and refrigerant distribute, thereby reduced the HTHP risk of system and returned the reliability that liquid risk has guaranteed system, thereby the reasonable distribution of system refrigerant has guaranteed the operational effect of machine in refrigeration, and reach the object of sufficient heat recovery energy-saving.Three-pipe heat recovery multi-connected machine system provided by the invention effectively improves the indoor comfortableness of the Reliability Assurance of Three-pipe heat recovery multi-connected machine system when cryogenic refrigeration.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, to the accompanying drawing of required use in describing be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of Three-pipe heat recovery multi-connected machine cooling system method provided by the invention;
Fig. 2 is Three-pipe heat recovery multi-connected machine entire system structure chart provided by the invention.
The specific embodiment
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable; to use specific embodiment and accompanying drawing below; technical scheme to the present invention's protection is clearly and completely described; obviously; the embodiments described below are only the present invention's part embodiment, but not whole embodiment.Embodiment based in this patent, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of this patent protection.
In the present embodiment, refer to Fig. 1 and in conjunction with shown in Fig. 2, provide a kind of refrigerating method of Three-pipe heat recovery multi-connected machine system, specifically comprise:
S1: open the first electric expansion valve and the second electric expansion valve, turn-off the first cross valve and the second cross valve simultaneously, open the first magnetic valve, close the second magnetic valve;
Concrete, Three-pipe heat recovery multi-connected machine system is when whole indoor sets all freezes, the first cross valve 7 and the second cross valve 8 power down, the first electric expansion valve 12 and the second electric expansion valve 13 are opened under the control of electric-control system, the first magnetic valve 18 energisings are opened, and the second magnetic valve 19 power down are closed.
S2: the low pressure gas pipe input of the first cooling medium switching device and the second cooling medium switching device and the conducting of tracheae output, and the high-pressure air pipe input of the first cooling medium switching device and the second cooling medium switching device and tracheae output are closed;
Concrete, electric-control system is by the low pressure gas pipe input 30D of the first cooling medium switching device 30 and tracheae output 30B conducting, and high-pressure air pipe input 30E and tracheae output 30B close; The low pressure gas pipe input 31D of the second cooling medium switching device 31 and tracheae output 31B conducting, high-pressure air pipe input 31E and tracheae output 31B close.
S3: a refrigerant part for the HTHP that compressor bank is discharged after the first cross valve to the first air cooling heat exchanger condensation by the first electric expansion valve reducing pressure by regulating flow, another part after the second cross valve to the second air cooling heat exchanger condensation by the second electric expansion valve reducing pressure by regulating flow;
Concrete, a refrigerant part for the HTHP that compressor bank 1 is discharged after the first cross valve 7 to the first air cooling heat exchanger 2 condensations by the first electric expansion valve 11 reducing pressure by regulating flows, a part after the second cross valve 8 to the second air cooling heat exchanger 4 condensations by the second electric expansion valve 12 reducing pressure by regulating flows.
S4: two air cooling heat exchangers are shunted through liquid pipe stop valve the liquid refrigerants after reducing pressure by regulating flow by liquid pipe branch pipe, shunting is to the first cooling medium switching device and the second cooling medium switching device;
Liquid refrigerants after two air cooling heat exchanger reducing pressure by regulating flows is clipped to the liquid pipe input 30C of the first cooling medium switching device 30 and the liquid pipe input 31C of the second cooling medium switching device 31 to liquid pipe stop valve 15 for rear minute by 50 shuntings of liquid pipe branch pipe.
S5: be diverted to the liquid refrigerants of the first indoor-unit cooling-medium switching device shifter, carry out evaporation endothermic by the first indoor set being connected with the first indoor-unit cooling-medium switching device shifter;
Be diverted to the liquid refrigerants of the second indoor-unit cooling-medium switching device shifter, by the second indoor set being connected with the second indoor-unit cooling-medium switching device shifter, carry out evaporation endothermic;
Branch to the liquid refrigerants of the first cooling medium switching device 30 liquid pipe input 30C, by the liquid pipe output 30B of the first cooling medium switching device 30, be transferred to the first indoor set 40;
Branch to the liquid refrigerants of the second cooling medium switching device 31 liquid pipe input 31C, by the liquid pipe output 31B of the second cooling medium switching device 31, be transferred to the second indoor set 41.
S6: the liquid refrigerants after the first indoor set and the second indoor set evaporation endothermic collaborates by low pressure gas pipe branch pipe, through low pressure gas pipe stop valve, enters gas-liquid separator;
S7: gas-liquid separator carries out the liquid refrigerants after evaporation endothermic to be transmitted back to compressor bank after gas-liquid separation, completes kind of refrigeration cycle.
From the liquid refrigerants of the first machine cooling medium switching device 30 and the second machine cooling medium switching device 31 outflows, by low pressure gas pipe branch pipe 51 interflow, to low pressure gas pipe stop valve 16, get back to gas-liquid separator 14, finally get back to compressor bank 1 and complete kind of refrigeration cycle, reach the object of Three-pipe heat recovery multi-connected machine cooling system.
Hence one can see that, by two air cooling heat exchangers being replaced to an original air cooling heat exchanger, make full use of the recuperation of heat feature of Three-pipe heat recovery multi-connected machine, with minimum energy consumption of compressor input, making full use of the heat exchange efficiency of outdoor unit heat exchanger and needing freely to select any one outdoor air cooling heat exchanger according to the control of system is to use or evaporimeter use as condenser, and the adjusting by outdoor fan makes Three-pipe heat recovery multi-connected machine system under any environment temperature and any interior machine open mode, guarantee that system high pressure and low pressure and delivery temperature and suction temperature and refrigerant distribute, thereby reduced the HTHP risk of system and returned the reliability that liquid risk has guaranteed system, thereby the reasonable distribution of system refrigerant has guaranteed the operational effect of machine in refrigeration, and reach the object of sufficient heat recovery energy-saving.Three-pipe heat recovery multi-connected machine system provided by the invention effectively improves the indoor comfortableness of the Reliability Assurance of Three-pipe heat recovery multi-connected machine system when cryogenic refrigeration.
The present invention also provides a kind of Three-pipe heat recovery multi-connected machine system; refer to shown in Fig. 2; for making goal of the invention of the present invention, feature, advantage can be more obvious and understandable; to use specific embodiment and accompanying drawing below, the technical scheme of the present invention's protection will be clearly and completely described.
Three-pipe heat recovery multi-connected machine system comprises in the present embodiment: for the compressor of cold-producing medium is provided to system, the first air cooling heat exchanger 2 and for giving the first outdoor fan 3 of described the first air cooling heat exchanger 2 enhanced heat exchanges, the second air cooling heat exchanger 4 and for giving the second outdoor fan 5 of described the second air cooling heat exchanger semi-finals heat exchange, at least two indoor sets with identical with described indoor set quantity for controlling its working method that is connected indoor set for refrigeration or the cooling medium switching device that heats, liquid pipe stop valve 15, low pressure gas pipe stop valve 16, high-pressure air pipe stop valve 17, be connected with described the first air cooling heat exchanger 2 for controlling described the first air cooling heat exchanger 2 as condenser or the first cross valve 7 of using as evaporimeter, be connected with described the second air cooling heat exchanger 4 for controlling described the second air cooling heat exchanger 4 as condenser or the second cross valve 8 of using as evaporimeter, the first magnetic valve 18 and the second magnetic valve 19,
The quantity of described compressor is at least two, described in each, compressor can provide cold-producing medium to system simultaneously, and described compressor forms compressor bank 1, and the output of compressor described in each and air return end are accumulated to the output of compressor bank and the air return end of compressor bank;
Described indoor set is provided with the gentle pipe end of liquid pipe end;
Described cooling medium switching device is provided with liquid pipe input, liquid pipe output, low pressure gas pipe input, tracheae output, high-pressure air pipe input;
The liquid pipe end of described indoor set is connected with the liquid pipe output of described indoor-unit cooling-medium switching device shifter, and the tracheae end of described indoor set is connected with the tracheae output of described indoor-unit cooling-medium switching device shifter;
The liquid pipe input of described indoor-unit cooling-medium switching device shifter is connected with described liquid pipe stop valve;
The low pressure gas pipe input of described indoor-unit cooling-medium switching device shifter is connected with described low pressure gas pipe stop valve;
The high-pressure air pipe input of described indoor-unit cooling-medium switching device shifter is connected with described high-pressure air pipe stop valve;
The input of the first end of the first end of described the first cross valve 7, described the second cross valve 8 and described the second magnetic valve 19 is connected with described compressor bank 1 output jointly;
The second end of described the first cross valve 7 is connected with described the first air cooling heat exchanger 2;
The 3rd end of the 3rd end of described the first cross valve 7 and the 4th end, described the second cross valve 8 is connected with described compressor bank 1 air return end with the output of the 4th end, the first magnetic valve 18 simultaneously;
The second end of described the second cross valve 8 is connected with described the second air cooling heat exchanger 4;
The input of described the first magnetic valve 18 is connected with described low pressure gas pipe stop valve 16;
The output of described the second magnetic valve 19 is connected with described high-pressure air pipe stop valve 17.
In the present embodiment, comprising: the first indoor set 40 and the second indoor set 41 and the first cooling medium switching device 30 and described the second cooling medium switching device 31 that are connected with described the second indoor set 41 with described the first indoor set 40 respectively;
Also comprise: liquid pipe branch pipe 50, low pressure gas pipe branch pipe 51, high-pressure air pipe branch pipe 52;
The liquid pipe output 30A of the first cooling medium switching device 30 connects with the liquid pipe end 40A of the first indoor set 40, and the liquid pipe input 30C of the first cooling medium switching device 30 connects with liquid pipe stop valve 15 by liquid pipe branch pipe 50; The tracheae output 30B of the first cooling medium switching device 30 connects with the tracheae end 40B of the first indoor set 40; The low pressure gas pipe input 30D of the first cooling medium switching device 30 connects with low pressure gas pipe stop valve 16 by low pressure gas pipe branch pipe 51; The high-pressure air pipe input 30E of the first cooling medium switching device 30 connects with high-pressure air pipe stop valve 17 by high-pressure air pipe branch pipe 52; The first cooling medium switching device 30 still heats for freezing for controlling the first indoor set 40 of its connection;
The liquid pipe output 31A of the second cooling medium switching device 31 connects with the liquid pipe end 41A of indoor set 41, and the liquid pipe input 31C of the second indoor-unit cooling-medium switching device shifter 31 connects with liquid pipe stop valve 15 by liquid pipe branch pipe 50; The tracheae output 31B of the second cooling medium switching device 31 connects with the tracheae end 41B of the second indoor set 41; The low pressure gas pipe input 30D of the first indoor-unit cooling-medium switching device shifter 30 connects with low pressure gas pipe stop valve 16 by low pressure gas pipe branch pipe 51; The high-pressure air pipe input 30E of the first cooling medium switching device 30 connects with high-pressure air pipe stop valve 17 by high-pressure air pipe branch pipe 52; The second cooling medium switching device 31 still heats for freezing for controlling the second indoor set 41 of its connection.
It should be noted that, use cross valve version can be selected in indoor-unit cooling-medium switching device shifter (for example above-mentioned the first cooling medium switching device 30, the second cooling medium switching device 31) inside, also can select by magnetic valve or electric expansion valve form, its final function is: the liquid pipe input of indoor-unit cooling-medium switching device shifter and liquid pipe output are conductings always, if the indoor set of its connection is refrigeration, the low pressure gas pipe input of indoor-unit cooling-medium switching device shifter and the conducting of tracheae output, high-pressure air pipe input and the not conducting of tracheae output; If the indoor set of its connection is for heating, the low pressure gas pipe input of indoor-unit cooling-medium switching device shifter and the not conducting of tracheae output, high-pressure air pipe input and the conducting of tracheae output.
In the present embodiment, also comprise the first electric expansion valve 12; Described the first air cooling heat exchanger 2 is connected with described liquid pipe stop valve 15 by described the first electric expansion valve 12, and described the first electric expansion valve 12 is for controlling the cold medium flux that flows through described the first air cooling heat exchanger 2.
Also comprise the second electric expansion valve 13; Described the second air cooling heat exchanger 4 is connected with described liquid pipe stop valve 15 by described the second electric expansion valve 13, and described the second electric expansion valve 13 is for controlling the cold medium flux that flows through described the second air cooling heat exchanger 4.
In the present embodiment, also comprise gas-liquid separator 14; Described gas-liquid separator 14 is provided with entrance point and the port of export; The entrance point of described gas-liquid separator 14 is communicated with jointly with described the first cross valve 7, described the second cross valve 8 and described the first magnetic valve 18; Described gas-liquid separator 14 ports of export are connected with described compressor bank 1 air return end.
Also comprise oil eliminator 6; Described oil eliminator 6 is provided with input, refrigerant output and oily output; Described oil eliminator 6 inputs are connected with the output of described compressor bank 1, and the refrigerant output of described oil eliminator 6 is connected with described the first cross valve 7, described the second cross valve 8 and described the second magnetic valve 19; The oily output of described oil eliminator 6 is provided with capillary, and is connected with the air return end of described compressor bank 1 by described capillary.
Oil eliminator 6 is for carrying out separated to flowing out the gaseous coolant of the exhaust outlet of compressor bank 1 or parallel connection compressor with compressor and freeze machine oil, high-pressure gaseous refrigerant is discharged by the refrigerant output 6B of oil eliminator, the oily output 6C of isolated compressor and freeze machine oil by oil eliminator discharges to have through capillary 24 and gets back to compressor bank 1, and wherein capillary 24 is for controlling the oil drain quantity of oil eliminator.
In the present embodiment, also comprise for controlling the control system of Three-pipe heat recovery multi-connected machine system equipment operation, control system presets the program under Three-pipe heat recovery multi-connected machine system different running method, and the method for operation here comprises: the refrigeration program of Three-pipe heat recovery multi-connected machine system and heat program.Control system, by internal processor, is carried out the program of setting, and the processor here can adopt microcontroller or single-chip microcomputer.Specifically carry out refrigeration program and heat program and can be selected by user.When user selects after the performing a programme of Three-pipe heat recovery multi-connected machine system, system is carried out according to the program of setting, and performing a programme and the control mode of concrete control system do not limit here.
In order to illustrate that more fully in the present embodiment, Three-pipe heat recovery multi-connected machine system is as follows at the concrete embodiment of the loop control of freezing and heat:
Three-pipe heat recovery multi-connected machine system is when whole indoor sets all freezes, the first cross valve 7 and the second cross valve 8 power down, the first electric expansion valve 12 and the second electric expansion valve 13 are opened under the control of electric-control system, the first magnetic valve 18 powers on and opens, the second magnetic valve 19 power down are closed, electric-control system is by the low pressure gas pipe input of the first cooling medium switching device 30 and the second cooling medium switching device 31 and the conducting of tracheae output, and high-pressure air pipe input and tracheae output are closed.A refrigerant part for the HTHP that compressor bank 1 is discharged after the first cross valve 7 to the first air cooling heat exchanger 2 condensations by the first electric expansion valve 12 reducing pressure by regulating flows, a part after the second cross valve 8 to the second air cooling heat exchanger 4 condensations by the second electric expansion valve 13 reducing pressure by regulating flows, liquid refrigerants after two air cooling heat exchanger reducing pressure by regulating flows is clipped to the liquid pipe input 30C of the first cooling medium switching device 30 and the liquid pipe input 31C of the second cooling medium switching device 31 to liquid pipe stop valve 15 for rear minute by 50 shuntings of liquid pipe branch pipe, branch to the liquid refrigerants of the first cooling medium switching device 30 liquid pipe input 30C, liquid pipe output 30B by the first cooling medium switching device 30 is transferred to the first indoor set 40, through the liquid refrigerants of the first indoor set 40, after the evaporation endothermic of First Heat Exchanger, the tracheae output that enters the first machine cooling medium switching device 30 enters the first machine cooling medium switching device 30 and is flowed out by the low pressure gas pipe input of the first machine cooling medium switching device 30, through the liquid refrigerants of the second indoor set 41, after the evaporation endothermic of the second indoor set 41 heat exchangers 41, the tracheae output that enters the second machine cooling medium switching device 31 enters the second machine cooling medium switching device 31 and is flowed out by the low pressure gas pipe input of the second machine cooling medium switching device 31, from the liquid refrigerants of the first machine cooling medium switching device 30 and the second machine cooling medium switching device 31 outflows, by low pressure gas pipe branch pipe 51 interflow, to low pressure gas pipe stop valve 16, get back to gas-liquid separator 14, finally get back to compressor bank 1 and complete kind of refrigeration cycle, reach the object of Three-pipe heat recovery multi-connected machine cooling system.
In the present embodiment, Three-pipe heat recovery multi-connected machine system is used and is heated, it is concrete when whole indoor sets all heats, the first magnetic valve 18 power down are closed, the second magnetic valve 19 powers on and opens, the first electric expansion valve 12, the second electric expansion valve 13 are opened under the control of electric-control system, the first cross valve 7, the second cross valve 8 power on, electric-control system is closed low pressure gas pipe input and the tracheae output of the first cooling medium switching device 30 and the second cooling medium switching device 31, high-pressure air pipe input and the conducting of tracheae output.The refrigerant of the HTHP that compressor bank 1 is discharged through the second magnetic valve 19 to after high-pressure air pipe stop valve 17 by the high-pressure air pipe input 30E of the first cooling medium switching device 30 and the high-pressure air pipe input 31E of the second machine cooling medium switching device 31 respectively after 52 shuntings of high-pressure air pipe branch pipe, through the refrigerant of the high-pressure air pipe input 30E of the first cooling medium switching device 30, to the heat exchanger of the first indoor set 40 of its connection, go after condensation heat release after the liquid pipe output 30A of the first cooling medium switching device 30 to liquid pipe input 30C, through the refrigerant of the high-pressure air pipe input 31E of the second cooling medium switching device 31, to the heat exchanger of the second indoor set 41 of its connection, go after condensation heat release after the liquid pipe output 31A of the second cooling medium switching device 31 to liquid pipe input 31C, then two strands of refrigerants arrive liquid pipe stop valve 15 by liquid pipe branch pipe 50 interflow, a refrigerant part behind interflow is got back to gas-liquid separator 14 through the first cross valve 7 after the first electric expansion valve 12 reducing pressure by regulating flows after the first air cooling heat exchanger 2 evaporation endothermics, a part is got back to gas-liquid separator 14 through the second cross valve 8 after the second electric expansion valve 13 reducing pressure by regulating flows after the second air cooling heat exchanger 4 evaporation endothermics, finally getting back to compressor bank 1 completes and heats circulation, reach the object that Three-pipe heat recovery multi-connected machine system heats.
It should be noted that, because the first cross valve 7 powers on, the first end 7D of the first cross valve 7 and the 3rd end 7E conducting, the HTHP refrigerant that compressor bank 1 is got rid of is fallen by capillary pipe plug the first cross valve 7 is interior, only flows through a small amount of refrigerant and gets back to gas-liquid separator 14 through capillary.Because the second cross valve 8 powers on, the first end 8D of the second cross valve 8 and the 3rd end 8E conducting, the HTHP refrigerant that compressor bank 1 is got rid of is blocked up by capillary 24 the second cross valve 8 is interior, only flows through a small amount of refrigerant and gets back to gas-liquid separator 14 through capillary 24.
In the present embodiment, Three-pipe heat recovery multi-connected machine system cryogenic refrigeration, high temperature heat and part in machine open refrigeration and partly in machine open under the condition of heating, there is reliability and comfortableness, and when low-temperature heating, can be good at defrosting, so system has good reliability, can ensure that Three-pipe heat recovery multi-connected machine system normally moves.
In the present embodiment, cryogenic refrigeration detailed process is as follows: Three-pipe heat recovery multi-connected machine system is when cryogenic refrigeration, if whole indoor sets is all opened refrigeration, air-cooled side environment temperature is low, two air cooling heat exchangers are without all making condenser, now, can close an air cooling heat exchanger, such as closing the second air cooling heat exchanger 4, the first cross valve 7 power down of Three-pipe heat recovery multi-connected machine system, the second cross valve 8 powers on, the first electric expansion valve 12 is opened under the control of electric-control system, the second electric expansion valve 13 is closed, the first magnetic valve 18 powers on and opens, the second magnetic valve 19 power down are closed, electric-control system is by the low pressure gas pipe input 30D of the first cooling medium switching device 30 and tracheae output 30B conducting, high-pressure air pipe input 30E and tracheae output 30B close, the low pressure gas pipe input 31D of the second cooling medium switching device 31 and tracheae output 31B conducting, high-pressure air pipe input 31E and tracheae output 31B close.The refrigerant of the HTHP that compressor bank 1 is discharged all after the first cross valve 7 to the first air cooling heat exchanger 2 condensations by the first electric expansion valve 12 reducing pressure by regulating flows, liquid refrigerants after reducing pressure by regulating flow divides and is clipped to the liquid pipe input 30C of the first cooling medium switching device 30 and the liquid pipe input 31C of the second cooling medium switching device 31 after liquid pipe stop valve 15 after 50 shuntings of liquid pipe branch pipe, through the refrigerant of the liquid pipe input 30C of the first cooling medium switching device 30 to after the heat exchanger devaporation heat absorption of the first indoor set 40 of its connection after the tracheae output 30B of the first cooling medium switching device 30 to low pressure gas pipe input 30D, through the refrigerant of the liquid pipe input 31C of the second cooling medium switching device 31 to after the heat exchanger devaporation heat absorption of the second indoor set 41 of its connection after the tracheae output 31B of the second cooling medium switching device 31 to low pressure gas pipe input 31D, then two strands of refrigerants are got back to gas-liquid separator 14 by low pressure gas pipe branch pipe 51 interflow to low pressure gas pipe stop valve 16, finally get back to compressor bank 1 and complete kind of refrigeration cycle, reach the object of Three-pipe heat recovery multi-connected machine cooling system.Also guaranteed the system reliability of freezing simultaneously under low ambient temperature.
It should be noted that: because the second cross valve 8 powers on, the second electric expansion valve 13 is closed, the HTHP refrigerant that compressor bank 1 is discharged is fallen by capillary pipe plug the second cross valve 8 is interior, the excessively a small amount of refrigerant of refrigeration stream is got back to gas-liquid separator 13 through capillary, and refrigerant in the second air cooling heat exchanger 4 is got back to gas-liquid separator 13 after the second cross valve 8, refrigerant is namely equivalent to not circulate in the second air cooling heat exchanger 4.
In the present embodiment, Three-pipe heat recovery multi-connected machine system is opened refrigeration at part indoor set, part indoor set is opened while heating, such as the first indoor set 40 is opened refrigeration, the second indoor set 41 is opened and is heated, according to the heat balance of system and pressure, control needs, the air cooling heat exchanger part of off-premises station need to be made condenser, part need to be made evaporimeter, such as using the first air cooling heat exchanger 2 as condenser, the second air cooling heat exchanger 4 is as evaporimeter, control procedure is as follows: the first cross valve 7 power down of Three-pipe heat recovery multi-connected machine system, the second cross valve 8 powers on, the first electric expansion valve 12 is opened under the control of electric-control system, the second electric expansion valve 13 is opened under the control of electric-control system, the first magnetic valve 18 powers on and opens, the second magnetic valve 19 powers on and opens, electric-control system is by the low pressure gas pipe input 30D of indoor-unit cooling-medium switching device shifter 30 and tracheae output 30B conducting, high-pressure air pipe input 30E and tracheae output 30B close.The low pressure gas pipe input 31D of the second cooling medium switching device 31 and tracheae output 31B are closed to high-pressure air pipe input 31E and tracheae output 31B conducting.The HTHP refrigerant part that compressor bank 1 is discharged after the second magnetic valve 19 to high-pressure air pipe stop valve 17 again after high-pressure air pipe branch pipe 52 to the high-pressure air pipe input 31E of the second indoor-unit cooling-medium switching device shifter 31, due to high-pressure air pipe input 31E and tracheae output 31B conducting, refrigerant is to the interior condensation heat release of the second indoor set 41, condensed liquid refrigerants arrives liquid pipe input 31C through the liquid pipe output 31A of the second indoor-unit cooling-medium switching device shifter 31, then arrive the common port of liquid pipe branch pipe 50 and liquid pipe stop valve 15 and the first electric expansion valve 12 and the second electric expansion valve 13, the HTHP refrigerant that compressor bank 1 is discharged in addition a part after the first cross valve 7 to the common port that reaches liquid pipe stop valve 15 and the first electric expansion valve 12 and the second electric expansion valve 13 and liquid pipe branch pipe 50 after the first air cooling heat exchanger 2 condensations after the first electric expansion valve 12, the condensed refrigerant of two-way interflow rear portion after the second electric expansion valve 13 to the second air cooling heat exchanger 4 evaporation endothermics, then through the second cross valve 8, finally get back to gas-liquid separator 14, a part of condensed refrigerant arrives liquid pipe output 30A through the liquid pipe input 30C of the first indoor-unit cooling-medium switching device shifter 30 in addition, then in the first indoor set 40, complete after evaporation endothermic, liquid pipe output 30B and low pressure gas pipe input 30D conducting due to the first indoor-unit cooling-medium switching device shifter 30, refrigerant after evaporation arrives low pressure gas pipe branch pipe 51 through the first indoor-unit cooling-medium switching device shifter 30, after low pressure gas pipe stop valve 16, after the first magnetic valve 18, get back to gas-liquid separator 14 again, refrigerant after final two-way evaporation is all got back to compressor bank 1 and is completed whole refrigerant circulation.Reach Three-pipe heat recovery multi-connected machine components of system as directed indoor set refrigeration, the object that part indoor set heats.Also guaranteed the system operation reliability under low ambient temperature simultaneously.
It should be noted that, in order to guarantee the refrigeration of the first indoor set 40 and the heating effect of the second indoor set 41, the certain balance of caloric requirement of system, make full use of the recuperation of heat feature of Three-pipe heat recovery multi-connected machine, with minimum compressor bank 1 input power consumption, by using outdoor air cooling heat exchanger part as condenser, part is as evaporimeter, and regulate by the Flow-rate adjustment of the first electric expansion valve 12 and the second electric expansion valve 13 and the air quantity of the first outdoor fan 3 and the second outdoor fan 5, reach with minimum compressor power consumption input, guaranteed the refrigeration and the heating effect that heats interior machine of machine in refrigeration, both guaranteed that user's comfortableness had also reached the object of abundant heat recovery energy-saving, while outdoor fan, electric expansion valve, the adjusting of outdoor air cooling heat exchanger coordinates, the pressure and temperature of system is controlled in rational scope, also guaranteed the reliability of system.
In the present embodiment, Three-pipe heat recovery multi-connected machine system can realize low-temperature heating.Concrete, when Three-pipe heat recovery multi-connected machine system hypothermia heats, if whole indoor sets is all opened and is heated, when basic controlling process heats referring to above-mentioned Three-pipe heat recovery multi-connected machine system, but because air-cooled side environment temperature is low, air cooling heat exchanger meeting frosting, if two air cooling heat exchangers (the first air cooling heat exchanger 2 and the second air cooling heat exchanger 4) defrost simultaneously, can cause the first indoor set 40, the second indoor set 41 to blow a cold wind over or do not dry, have influence on like this Three-pipe heat recovery multi-connected machine system and can not continue to heat, and then affect user's comfortableness.When air cooling heat exchanger needs defrost, can as condenser, defrost by an air cooling heat exchanger, another air cooling heat exchanger is as evaporimeter, thus assurance system continues to heat.Wherein, the process of air cooling heat exchanger defrost is shown in that air cooling heat exchanger when Three-pipe heat recovery multi-connected machine system high temperature heats makees condenser, an air cooling heat exchanger is done the process of evaporimeter, also in the time of can being Three-pipe heat recovery multi-connected machine system hypothermia refrigeration, an air cooling heat exchanger is made condenser, an air cooling heat exchanger is done the process of evaporimeter, repeats no more herein.
Three-pipe heat recovery multi-connected machine system other environment temperatures and indoor set open ruuning situation under refrigeration or heating mode can with reference to more than various running statuses, repeat no more herein.
In summary it can be seen, the present invention is by replacing two air cooling heat exchangers an original air cooling heat exchanger, make full use of the recuperation of heat feature of Three-pipe heat recovery multi-connected machine, with minimum energy consumption of compressor input, making full use of the heat exchange efficiency of outdoor unit heat exchanger and needing freely to select any one outdoor air cooling heat exchanger according to the control of system is to use or evaporimeter use as condenser, and the adjusting by outdoor fan and electric expansion valve makes Three-pipe heat recovery multi-connected machine system under any environment temperature and any interior machine open mode, guarantee that system high pressure and low pressure and delivery temperature and suction temperature and refrigerant distribute, thereby reduced the HTHP risk of system and returned the reliability that liquid risk has guaranteed system, thereby the reasonable distribution of system refrigerant has guaranteed refrigeration and has heated the operational effect of interior machine, and reached the object of sufficient heat recovery energy-saving.In addition, when Three-pipe heat recovery multi-connected machine system is during at low-temperature heating, the in the situation that of needing defrost after the frosting of off-premises station air cooling heat exchanger, by an air cooling heat exchanger is done to condenser defrost, air cooling heat exchanger is made evaporimeter and is provided and continue to heat, meet unit and can continue to provide the demand heating, thereby guaranteed user's comfort level.Therefore, the indoor comfort of Three-pipe heat recovery multi-connected machine system provided by the invention during effectively improving the integrity problem of Three-pipe heat recovery multi-connected machine system when cryogenic refrigeration, high temperature heat and low-temperature heating and need to defrosting.
It will be appreciated by persons skilled in the art that hypertonia or the too low stable operation that all can affect Three-pipe heat recovery multi-connected machine system in Three-pipe heat recovery multi-connected machine system.Therefore, the present invention moves reliably for guaranteeing Three-pipe heat recovery multi-connected machine system stability.
In the present embodiment: Three-pipe heat recovery multi-connected machine system also comprises for detection of the low-pressure sensor 20 of pressure size between described gas-liquid separator 14 outputs and described compressor bank 1 air return end with for according to the pressure size detecting, controls the low tension switch 21 that between described gas-liquid separator 14 outputs and described compressor bank 1 air return end, pipeline is opened and turn-offed;
Described low tension switch 21 and described low-pressure sensor 20 are arranged between described gas-liquid separator 14 outputs and described compressor bank 1 air return end.
When the gas pressure between gas-liquid separator 14 outlet and the gas returning port of compressor bank 1 or parallel connection compressor is during lower than preset value; low pressure switch 21 disconnects automatically; and send a pressure signal to electric-control system; thereby electric-control system is taked corresponding safeguard measure according to the pressure signal receiving; for example, turn off compressor bank 1.
In the present embodiment: the refrigerant output 6B that is provided with high-pressure switch 22 and high-pressure sensor 23 or described oil eliminator 6 between the output of described compressor bank 1 and described oil eliminator 6 entrance point 6A is provided with high-pressure switch 22 and high-pressure sensor 23;
Described high-pressure sensor 23 is for detection of the pressure size of the output of described compressor bank 1; Described high-pressure switch 22, for according to the pressure size detecting, is controlled described compressor bank 1 opening and closing.
When the pressure of the gas of discharging when compressor bank 1 was looked into preset value; high-pressure switch 22 disconnects automatically, and sends a pressure signal to electric-control system, thereby electric-control system is taked corresponding safeguard measure according to the pressure signal receiving; for example, turn off compressor bank 1.
In addition; the automatically controlled system high pressure pressure feeding back by real-time detection high-pressure sensor 23 of multi-connected machine; after the logic control computing of participation system, make corresponding control or protection; such as high-pressure being detected, by logical operation, adjust in real time the aperture size of the first electric expansion valve 12 and the second electric expansion valve 13.
In the present embodiment; the system low-voltage pressure that low-pressure sensor 20 on the link circuit of gas-liquid separator 14 outlet and the gas returning port of compressor bank 1 feeds back; after the logic control computing of participation system, make corresponding control or protection; such as low pressure being detected, by logical operation, adjust in real time the aperture size of the first electric expansion valve 12 and the second electric expansion valve 13.
It should be noted is that, in above-described embodiment, the model of the first air cooling heat exchanger 2 and the second air cooling heat exchanger 4 can be identical, also can be different.Wherein, preferred same model.
The model of the first outdoor fan 3 and the second outdoor fan 5 can be identical, also can be different, do not limit herein.
The model of the first cross valve 7 and the second cross valve 8 can be identical or not identical, do not limit herein.
The model of two or many indoor sets is identical or different, does not limit herein.
The model of two or a plurality of indoor-unit cooling-medium switching device shifters is identical or different, does not limit herein.
In this description, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a refrigerating method for Three-pipe heat recovery multi-connected machine system, is characterized in that, comprising:
S1: open the first electric expansion valve and the second electric expansion valve, turn-off the first cross valve and the second cross valve simultaneously, open the first magnetic valve, close the second magnetic valve;
S2: the low pressure gas pipe input of the first cooling medium switching device and the second cooling medium switching device and the conducting of tracheae output, and the high-pressure air pipe input of the first cooling medium switching device and the second cooling medium switching device and tracheae output are closed;
S3: a refrigerant part for the HTHP that compressor bank is discharged after the first cross valve to the first air cooling heat exchanger condensation by the first electric expansion valve reducing pressure by regulating flow, another part after the second cross valve to the second air cooling heat exchanger condensation by the second electric expansion valve reducing pressure by regulating flow;
S4: two air cooling heat exchangers are shunted through liquid pipe stop valve the liquid refrigerants after reducing pressure by regulating flow by liquid pipe branch pipe, shunting is to the first cooling medium switching device and the second cooling medium switching device;
S5: be diverted to the liquid refrigerants of the first indoor-unit cooling-medium switching device shifter, carry out evaporation endothermic by the first indoor set being connected with the first indoor-unit cooling-medium switching device shifter;
Be diverted to the liquid refrigerants of the second indoor-unit cooling-medium switching device shifter, by the second indoor set being connected with the second indoor-unit cooling-medium switching device shifter, carry out evaporation endothermic;
S6: the liquid refrigerants after the first indoor set and the second indoor set evaporation endothermic collaborates by low pressure gas pipe branch pipe, through low pressure gas pipe stop valve, enters gas-liquid separator;
S7: gas-liquid separator carries out the liquid refrigerants after evaporation endothermic to be transmitted back to compressor bank after gas-liquid separation, completes kind of refrigeration cycle.
2. a Three-pipe heat recovery multi-connected machine system, it is characterized in that, comprise: for the compressor of cold-producing medium is provided to system, the first air cooling heat exchanger and for giving the first outdoor fan of described the first air cooling heat exchanger enhanced heat exchange, the second air cooling heat exchanger and for giving the second outdoor fan of described the second air cooling heat exchanger enhanced heat exchange, at least two indoor sets with identical with described indoor set quantity for controlling its working method that is connected indoor set for refrigeration or the cooling medium switching device that heats, liquid pipe stop valve, low pressure gas pipe stop valve, high-pressure air pipe stop valve, be connected with described the first air cooling heat exchanger for controlling described the first air cooling heat exchanger as condenser or the first cross valve of using as evaporimeter, be connected with described the second air cooling heat exchanger for controlling described the second air cooling heat exchanger as condenser or the second cross valve of using as evaporimeter, the first magnetic valve and the second magnetic valve,
The quantity of described compressor is at least two, described in each, compressor can provide cold-producing medium to system simultaneously, and described compressor forms compressor bank, and the output of compressor described in each and air return end are accumulated to the output of compressor bank and the air return end of compressor bank;
Described indoor set is provided with the gentle pipe end of liquid pipe end;
Described cooling medium switching device is provided with liquid pipe input, liquid pipe output, low pressure gas pipe input, tracheae output, high-pressure air pipe input;
The liquid pipe end of described indoor set is connected with the liquid pipe output of described indoor-unit cooling-medium switching device shifter, and the tracheae end of described indoor set is connected with the tracheae output of described indoor-unit cooling-medium switching device shifter;
The liquid pipe input of described indoor-unit cooling-medium switching device shifter is connected with described liquid pipe stop valve;
The low pressure gas pipe input of described indoor-unit cooling-medium switching device shifter is connected with described low pressure gas pipe stop valve;
The high-pressure air pipe input of described indoor-unit cooling-medium switching device shifter is connected with described high-pressure air pipe stop valve;
The input of the first end of the first end of described the first cross valve, described the second cross valve and described the second magnetic valve is connected with described compressor bank output jointly;
The second end of described the first cross valve is connected with described the first air cooling heat exchanger;
The output of the 3rd end of described the first cross valve and the 3rd end of the 4th end, described the second cross valve and the 4th end, the first magnetic valve is connected with described compressor bank air return end simultaneously;
The second end of described the second cross valve is connected with described the second air cooling heat exchanger;
The input of described the first magnetic valve is connected with described low pressure gas pipe stop valve;
The output of described the second magnetic valve is connected with described high-pressure air pipe stop valve.
3. Three-pipe heat recovery multi-connected machine system according to claim 2, is characterized in that,
Also comprise the first electric expansion valve;
Described the first air cooling heat exchanger is connected with described liquid pipe stop valve by described the first electric expansion valve, and described the first electric expansion valve is for controlling the cold medium flux that flows through described the first air cooling heat exchanger.
4. Three-pipe heat recovery multi-connected machine system according to claim 2, is characterized in that,
Also comprise the second electric expansion valve;
Described the second air cooling heat exchanger is connected with described liquid pipe stop valve by described the second electric expansion valve, and described the second electric expansion valve is for controlling the cold medium flux that flows through described the second air cooling heat exchanger.
5. Three-pipe heat recovery multi-connected machine system according to claim 2, is characterized in that,
Also comprise the gas-liquid separator for carrying out gas-liquid separation to flowing into the refrigerant of described compressor bank;
Described gas-liquid separator is provided with entrance point and the port of export;
The entrance point of described gas-liquid separator is communicated with jointly with described the first cross valve, described the second cross valve and described the first magnetic valve; The described gas-liquid separator port of export is connected with described compressor bank air return end.
6. Three-pipe heat recovery multi-connected machine system according to claim 5, is characterized in that,
Also comprise for detection of the low-pressure sensor of pressure size between described gas-liquid separator output and described compressor bank air return end with for according to the pressure size detecting, control the low tension switch that between described gas-liquid separator output and described compressor bank air return end, pipeline is opened and turn-offed;
Described low tension switch and described low-pressure sensor are arranged between described gas-liquid separator output and described compressor bank air return end.
7. Three-pipe heat recovery multi-connected machine system according to claim 2, is characterized in that,
Also comprise oil eliminator; Described oil eliminator is provided with input, refrigerant output and oily output;
Described oil eliminator input is connected with the output of described compressor bank, and the refrigerant output of described oil eliminator is connected with described the first cross valve, described the second cross valve and described the second magnetic valve;
The oily output of described oil eliminator is provided with the capillary being communicated with described compressor bank air return end;
Described capillary is for carrying out separated to flowing out the high-pressure gaseous refrigerant of compressor bank with refrigerator oil, high-pressure gaseous refrigerant is discharged by the refrigerant output of described oil eliminator, capillary by isolated refrigerator oil by described oil eliminator oil output flows back to described compressor bank, and described capillary is for controlling the oil drain quantity of described oil eliminator.
8. Three-pipe heat recovery multi-connected machine system according to claim 7, is characterized in that,
The refrigerant output that is provided with high-pressure switch and high-pressure sensor or described oil eliminator between the output of described compressor bank and described oil eliminator entrance point is provided with high-pressure switch and high-pressure sensor;
Described high-pressure sensor is for detection of the pressure size of the output of described compressor bank; Described high-pressure switch, for according to the pressure size detecting, is controlled described compressor bank opening and closing.
9. Three-pipe heat recovery multi-connected machine system according to claim 2, is characterized in that,
Three-pipe heat recovery multi-connected machine system is provided with two indoor sets; Described two indoor sets comprise: the first indoor set and the second indoor set, Three-pipe heat recovery multi-connected machine system is also provided with the first indoor-unit cooling-medium switching device shifter of being connected with described the second indoor set with described the first indoor set respectively and described the second indoor-unit cooling-medium switching device shifter and liquid pipe branch pipe, low pressure gas pipe branch pipe, high-pressure air pipe branch pipe;
The liquid pipe output of described the first indoor-unit cooling-medium switching device shifter is connected with the liquid pipe end of described the first indoor set, and the liquid pipe input of described the first indoor-unit cooling-medium switching device shifter is connected with described liquid pipe stop valve by described liquid pipe branch pipe; The low pressure gas pipe output of the first indoor-unit cooling-medium switching device shifter is connected with the tracheae end of described the first indoor set; The tracheae input of the first indoor-unit cooling-medium switching device shifter is connected with described off-premises station low pressure gas pipe stop valve by low pressure gas pipe branch pipe; The high-pressure air pipe input of the first indoor-unit cooling-medium switching device shifter is connected with the high-pressure air pipe stop valve of described off-premises station by described high-pressure air pipe branch pipe;
The liquid pipe output of described the second indoor-unit cooling-medium switching device shifter is connected with the liquid pipe end of described the second indoor set, and the liquid pipe input of described the second indoor-unit cooling-medium switching device shifter is connected with the liquid pipe stop valve of described off-premises station by described liquid pipe branch pipe; The tracheae output of the second indoor-unit cooling-medium switching device shifter is connected with the tracheae end of described indoor set; The low pressure gas pipe input of the first indoor-unit cooling-medium switching device shifter is connected with the low pressure gas pipe stop valve of described off-premises station by low pressure gas pipe branch pipe; The high-pressure air pipe input of the first indoor-unit cooling-medium switching device shifter is connected with the high-pressure air pipe stop valve of described off-premises station by high-pressure air pipe branch pipe.
10. Three-pipe heat recovery multi-connected machine system according to claim 2, is characterized in that,
Described compressor adopts frequency-changeable compressor, or constant speed compressor, or digital compressor.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104748424A (en) * 2015-03-31 2015-07-01 广东美的暖通设备有限公司 Outdoor unit assembly of multiple on-line system and multiple on-line system with same
CN106524611A (en) * 2016-10-31 2017-03-22 青岛海尔空调电子有限公司 Control method for fans of air cooling screw unit
CN107356009A (en) * 2017-07-25 2017-11-17 广东美的暖通设备有限公司 Multiple on-line system and its low temperature control method
WO2018036251A1 (en) * 2016-08-23 2018-03-01 广东美的暖通设备有限公司 Switching device for multi-split air conditioner and multi-split air conditioner having same
CN107940826A (en) * 2017-11-10 2018-04-20 广东美的暖通设备有限公司 Multi-line system and its refrigerant distribution control method and device
WO2019242264A1 (en) * 2018-06-20 2019-12-26 广东美的暖通设备有限公司 Three-pipe heat recovery multi-split system and control method therefor
CN112594986A (en) * 2020-12-31 2021-04-02 广东积微科技有限公司 Multi-split air conditioning system and refrigerant recovery control method thereof
CN112833481A (en) * 2019-11-22 2021-05-25 青岛海尔空调电子有限公司 Air supplementing and enthalpy increasing device for air conditioning system and air conditioning system
US11175063B2 (en) 2016-08-23 2021-11-16 Gd Midea Heating & Ventilating Equipment Co., Ltd. Switching device for multi-split air conditioner and multi-split air conditioner having same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001074331A (en) * 1999-06-29 2001-03-23 Sanyo Electric Co Ltd Outdoor unit of air conditioner, and air conditioning system using the same
US20080022710A1 (en) * 2006-07-29 2008-01-31 Jeong Ho J Simultaneous heating/cooling multi air conditioner
KR20090124226A (en) * 2008-05-29 2009-12-03 모아기연 주식회사 Heatpump system and dehumidificating method thereof
KR20100097827A (en) * 2009-02-27 2010-09-06 이형문 Heat pump type cooling and heating apparatus
CN103673123A (en) * 2012-09-24 2014-03-26 Lg电子株式会社 Integral air conditioning system for heating and cooling
CN103759455A (en) * 2014-01-27 2014-04-30 青岛海信日立空调系统有限公司 Heat recovery variable-frequency multi-split heat pump system and control method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001074331A (en) * 1999-06-29 2001-03-23 Sanyo Electric Co Ltd Outdoor unit of air conditioner, and air conditioning system using the same
US20080022710A1 (en) * 2006-07-29 2008-01-31 Jeong Ho J Simultaneous heating/cooling multi air conditioner
KR20090124226A (en) * 2008-05-29 2009-12-03 모아기연 주식회사 Heatpump system and dehumidificating method thereof
KR20100097827A (en) * 2009-02-27 2010-09-06 이형문 Heat pump type cooling and heating apparatus
CN103673123A (en) * 2012-09-24 2014-03-26 Lg电子株式会社 Integral air conditioning system for heating and cooling
CN103759455A (en) * 2014-01-27 2014-04-30 青岛海信日立空调系统有限公司 Heat recovery variable-frequency multi-split heat pump system and control method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104748424A (en) * 2015-03-31 2015-07-01 广东美的暖通设备有限公司 Outdoor unit assembly of multiple on-line system and multiple on-line system with same
CN104748424B (en) * 2015-03-31 2017-06-06 广东美的暖通设备有限公司 The outdoor unit component and the multiple on-line system with it of multiple on-line system
US11175063B2 (en) 2016-08-23 2021-11-16 Gd Midea Heating & Ventilating Equipment Co., Ltd. Switching device for multi-split air conditioner and multi-split air conditioner having same
WO2018036251A1 (en) * 2016-08-23 2018-03-01 广东美的暖通设备有限公司 Switching device for multi-split air conditioner and multi-split air conditioner having same
US11022336B2 (en) 2016-08-23 2021-06-01 Gd Midea Heating & Ventilating Equipment Co., Ltd. Switching device for multi-split air conditioner and multi-split air conditioner having same
CN106524611A (en) * 2016-10-31 2017-03-22 青岛海尔空调电子有限公司 Control method for fans of air cooling screw unit
CN107356009B (en) * 2017-07-25 2021-05-04 广东美的暖通设备有限公司 Multi-split air conditioning system and low-temperature control method thereof
CN107356009A (en) * 2017-07-25 2017-11-17 广东美的暖通设备有限公司 Multiple on-line system and its low temperature control method
CN107940826B (en) * 2017-11-10 2020-04-03 广东美的暖通设备有限公司 Multi-split air conditioning system and refrigerant distribution control method and device thereof
CN107940826A (en) * 2017-11-10 2018-04-20 广东美的暖通设备有限公司 Multi-line system and its refrigerant distribution control method and device
WO2019242264A1 (en) * 2018-06-20 2019-12-26 广东美的暖通设备有限公司 Three-pipe heat recovery multi-split system and control method therefor
CN112833481A (en) * 2019-11-22 2021-05-25 青岛海尔空调电子有限公司 Air supplementing and enthalpy increasing device for air conditioning system and air conditioning system
CN112594986A (en) * 2020-12-31 2021-04-02 广东积微科技有限公司 Multi-split air conditioning system and refrigerant recovery control method thereof

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