CN103983038B - Air conditioning system and control method thereof - Google Patents

Air conditioning system and control method thereof Download PDF

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Publication number
CN103983038B
CN103983038B CN201410189184.0A CN201410189184A CN103983038B CN 103983038 B CN103983038 B CN 103983038B CN 201410189184 A CN201410189184 A CN 201410189184A CN 103983038 B CN103983038 B CN 103983038B
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China
Prior art keywords
expansion valve
heat exchanger
air conditioning
conditioning system
valve
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CN103983038A (en
Inventor
肖俊钊
许永锋
梁伯启
李洪生
卢健洪
吴孔祥
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC 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 provides a kind of air conditioning system and control method thereof。Wherein, air conditioning system includes: compressor, cross valve, outdoor heat exchanger, main electric expansion valve, indoor heat exchanger, auxiliary electron expansion valve, feather valve and temperature sensing device, compressor is connected with cross valve by the first pipeline, the Single port of main electric expansion valve is connected with outdoor heat exchanger by second pipe, and another port is connected with indoor heat exchanger by the 3rd pipeline;The Single port of auxiliary electron expansion valve is connected by the 4th pipeline and the first pipeline, and another port is connected with second pipe;Single port and the 4th pipeline of feather valve are connected, and another port is connected with the 3rd pipeline。Air conditioning system provided by the invention, by adding auxiliary electron expansion valve and feather valve in the entire system, make the air conditioning system can according to different situations, change the break-make of auxiliary electron expansion valve and feather valve place pipeline, realize the switching of air conditioning system different mode, thus improve the comfort of product。

Description

Air conditioning system and control method thereof
Technical field
The present invention relates to air-conditioning technical field, in particular to the control method of a kind of air conditioning system and this air conditioning system。
Background technology
At present, existing air conditioning system, Defrost mode is generally adopted the mode of cross valve commutation, utilizes compressor air-discharging to carry out hot gas defrosting;This Defrost mode can cause indoor heat exchanger to be in refrigerating state, in after exiting defrost, the machine likely short time is in anti-cold wind state, affect user and use the impression of side, simultaneously, during low-temperature heating, outside humidity is very low, the very slow not even frosting of outer machine frosting so that system usually occurs that outer machine frost-free enters the situation of defrosting mode。Additionally; for multiple on-line system when carrying out low temperature Smaller load refrigerating operaton; even if operating in low-limit frequency; its refrigeration is still powerful; indoor set evaporating temperature so can be caused too low, and interior machine condensation even anti-freeze is protected, therefore; no matter it is for heating and defrosting or for Smaller load refrigerating operaton, existing system still suffers from defect。
Summary of the invention
In order to solve above-mentioned technical problem at least one, it is an object of the present invention to provide a kind of can according to different situations, change mode of operation air conditioning system。
A kind of control method with above-mentioned air conditioning system of offer is provided。
In view of this, the embodiment of first aspect present invention provides a kind of air conditioning system, including: compressor, described compressor has air vent and gas returning port, and described compressor is for compression refrigerant;Cross valve, described cross valve has exhaust port D, condenser port C, vaporizer port E and suction port S, and described exhaust port D is connected with described air vent by the first pipeline, and described suction port S is connected with described gas returning port;Outdoor heat exchanger, described outdoor heat exchanger has the first coolant gateway and the second coolant gateway, and described first coolant gateway is connected with described condenser port C;Main electric expansion valve, the Single port of described main electric expansion valve is connected with described second coolant gateway by second pipe;Indoor heat exchanger, described indoor heat exchanger has the 3rd coolant gateway and the 4th coolant gateway, described 3rd coolant gateway is connected with described vaporizer port E, and described 4th coolant gateway is connected by the another port of the 3rd pipeline with described main electric expansion valve;Auxiliary electron expansion valve, the Single port of described auxiliary electron expansion valve is connected with described first pipeline by the 4th pipeline, and another port is connected with described second pipe;Feather valve, the Single port of described feather valve is connected with described 4th pipeline, and another port is connected with described 3rd pipeline;And temperature sensing device, described temperature sensing device is used for detecting outdoor environment temperature or outdoor heat exchange actuator temperature, and controls the aperture of described main electric expansion valve, the aperture of described auxiliary electron expansion valve and being turned on and off of described feather valve according to outdoor environment temperature or outdoor heat exchange actuator temperature。
Air conditioning system provided by the invention, by adding auxiliary electron expansion valve and feather valve in whole air conditioning system, make the air conditioning system can according to different situations, change the break-make of auxiliary electron expansion valve and feather valve place pipeline, realize the switching of air conditioning system different mode, thus improve the comfort of product, specifically, when using air conditioner refrigerating summer, due to outdoor temperature higher time, main electric expansion valve is opened, auxiliary electron expansion valve and feather valve are closed, in system, all of coolant is all used for condensing heat release refrigeration, air-conditioning is made to be in full load refrigeration mode, when using air conditioner refrigerating at transition season (such as autumn), owing to indoor humidity is bigger, main electric expansion valve and feather valve are opened, auxiliary electron expansion valve cuts out, coolant in system is divided into two parts, Part I coolant condenses heat release by outdoor heat exchanger, Part II coolant directly out mix with the Part I after condensation heat release from compressor after heat exchanger in inlet chamber, Part II coolant uninstalls a part of cold of Part I coolant, air conditioning system is made to be in low temperature Smaller load refrigeration mode, thus avoiding owing to indoor heat exchanger temperature is too low, indoor heat exchanger occurs condensation, cause that anti-freeze is protected, the situation of outer machine frequent start-stop occurs;When using air-conditioning heating winter, main electric expansion valve is opened, auxiliary electron expansion valve and feather valve are closed, in system, all of coolant is all used for heating, air-conditioning is made to be in full load heating mode, after a period of time, after outdoor heat exchanger arrives uniform temperature, auxiliary electron expansion valve and main electric expansion valve are opened, feather valve cuts out, and the aperture of main electric expansion valve is less than the aperture of auxiliary electron expansion valve, coolant in system is divided into two parts, Part I coolant condenses heat release by indoor heat exchanger, Part II coolant directly from compressor out with condensation heat release after Part I coolant mix after inlet chamber external heat exchanger, Part II coolant improves the temperature of Part I coolant, wherein, coolant in system is mainly used in condensing heating, air conditioning system is in low-temperature heating pattern, slow down the speed of outdoor heat exchanger frosting, namely defrosting cycle is extended, thus avoiding on off-premises station without frosting or there is less frosting, and the situation that air conditioning system enters defrosting mode occurs, air-conditioner outdoor unit frosting after a period of time, auxiliary electron expansion valve and main electric expansion valve are opened, feather valve cuts out, and the aperture of main electric expansion valve is less than the aperture of auxiliary electron expansion valve, coolant in system is divided into two parts, Part I coolant condenses heat release by indoor heat exchanger, Part II coolant directly from compressor out with condensation heat release after Part I coolant mix after inlet chamber external heat exchanger, coolant in system is mainly used in heating and defrosting, air conditioning system is in heating and defrosting pattern, indoor are persistently heated by this kind of pattern air conditioning system while defrosting, thus avoiding environment heat absorption indoor to occur to the situation of outdoor heat exchanger defrost, improve the comfort of user, and then improve the market competitiveness。
It addition, the air conditioning system in above-described embodiment provided by the invention can also have following additional technical feature:
According to one embodiment of present invention, temperature sensing device includes: the first temperature sensor, the second temperature sensor and controller;When described air conditioning system is under refrigeration mode, described first temperature sensor is for the ambient temperature outside sensing chamber, and obtain outdoor environment temperature value, described controller receiving chamber external environment temperature value, and control the aperture of described main electric expansion valve, the aperture of described auxiliary electron expansion valve and being turned on and off of described feather valve according to outdoor environment temperature value;When described air conditioning system is under heating mode, described second temperature sensor is for detecting the temperature of outdoor unit heat exchanger, and obtain outdoor heat exchanger temperature value, described controller receiving chamber external heat exchanger temperature value, and control the aperture of described main electric expansion valve, the aperture of described auxiliary electron expansion valve and being turned on and off of described feather valve according to outdoor heat exchanger temperature value。
According to one embodiment of present invention, described air conditioning system also includes: gas-liquid separator, and described gas-liquid separator is arranged between described suction port S and the described gas returning port of described compressor of described cross valve。
According to one embodiment of present invention, described air conditioning system also includes: oil eliminator, described oil eliminator is arranged on described first pipeline, and the gas outlet of described oil eliminator is connected with described auxiliary electron expansion valve and cross valve exhaust port D, air inlet is connected with the described air vent of described compressor。
According to one embodiment of present invention, described feather valve is electromagnetic valve。
The embodiment of second aspect present invention provides the control method of a kind of air conditioning system, including: step 100, receive user and select the instruction of air conditioning system mode of operation;Step 102, when described air conditioning system is in running order, by the first temperature sensor outdoor environment temperature or the second temperature sensor sensing chamber external heat exchanger temperature, and obtains outdoor environment temperature value or outdoor heat exchanger temperature value;Step 104, controller controls the aperture of main electric expansion valve, the aperture of auxiliary electron expansion valve and being turned on and off of feather valve according to outdoor environment temperature value or outdoor heat exchanger temperature value。
It addition, the control method of the air conditioning system in above-described embodiment provided by the invention can also have following additional technical feature:
According to one embodiment of present invention, when air conditioning system is under refrigeration mode, step 102 specifically includes: step 1021A, the described first temperature sensor work in air conditioning system;Step 1022A, described first temperature sensor detection outdoor environment temperature, and obtain outdoor environment temperature value。
According to one embodiment of present invention, step 104 specifically includes: step 1041A, controller receiving chamber external environment temperature value, and by outdoor environment temperature value compared with the first preset value;Step 1042A, when outdoor environment temperature value is be more than or equal to the first preset value, the described controller described main electric expansion valve of control is opened, auxiliary electron expansion valve cuts out, feather valve cuts out;When outdoor environment temperature value is less than the first preset value, the described controller described main electric expansion valve of control is opened, auxiliary electron expansion valve cuts out, feather valve is opened。
According to one embodiment of present invention, when air conditioning system is under heating mode, step 102 specifically includes: step 1021B, the described second temperature sensor work in air conditioning system;Step 1022B, described second temperature sensor is used for sensing chamber's external heat exchanger temperature, and obtains outdoor heat exchanger temperature value。
According to one embodiment of present invention, step 104 particularly as follows: step 1041B, controller receiving chamber external heat exchanger temperature value, and by outdoor heat exchanger temperature value respectively compared with the second preset value and the 3rd preset value;Step 1042B, when outdoor heat exchanger temperature value is more than the second preset value, the described controller described main electric expansion valve of control is opened, described auxiliary electron expansion valve cuts out, described feather valve cuts out;When outdoor heat exchanger temperature value is less than or equal to the second preset value and be more than or equal to three preset values, open, described auxiliary electron expansion valve is opened by described main electric expansion valve for the control of described controller, described feather valve cuts out, and the aperture of described main electric expansion valve is more than the aperture of described auxiliary electron expansion valve;When outdoor heat exchanger temperature value is less than three preset values, open, described auxiliary electron expansion valve is opened by described main electric expansion valve for the control of described controller, described feather valve cuts out, and the aperture of described main electric expansion valve is less than the aperture of described auxiliary electron expansion valve。
The control method of air conditioning system provided by the invention, according to different situations, can change the break-make of auxiliary electron expansion valve and feather valve place pipeline in air conditioning system, it is achieved the switching of air conditioning system different mode, thus improve the comfort of product。
The additional aspect of the present invention and advantage will become apparent upon in description below part, or recognized by the practice of the present invention。
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the structural representation of air conditioning system of the present invention;
Fig. 2 is the structured flowchart of temperature sensing device of the present invention;
Fig. 3 is the flow chart of the control method that air conditioning system is under refrigeration mode air conditioning system;
Fig. 4 is the flow chart of the control method that air conditioning system is under heating mode air conditioning system。
Wherein, in Fig. 1 and Fig. 2, corresponding relation between accompanying drawing labelling and component names is:
1 compressor, 2 cross valves, 3 outdoor heat exchangers, 4 main electric expansion valves, 5 indoor heat exchangers, 6 auxiliary electron expansion valves, 7 feather valves, 8 temperature sensing devices, 801 first temperature sensors, 802 second temperature sensors, 803 controllers, 9 first pipelines, 10 second pipes, 11 the 3rd pipelines, 12 the 4th pipelines;13 gas-liquid separators, 14 oil eliminators。
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail。It should be noted that when not conflicting, embodiments herein and the feature in embodiment can be mutually combined。
Elaborate a lot of detail in the following description so that fully understanding the present invention; but; the present invention can also adopt other to be different from other modes described here to implement, and therefore, protection scope of the present invention is by the restriction of following public specific embodiment。
Referring to Fig. 1 and Fig. 2, air conditioning system according to some embodiments of the invention is described。
As it is shown in figure 1, air conditioning system provided by the invention includes: compressor 1, cross valve 2, outdoor heat exchanger 3, main electric expansion valve 4, indoor heat exchanger 5, auxiliary electron expansion valve 6, gas-liquid separator 13, oil eliminator 14, feather valve 7 and temperature sensing device 8。
Compressor 1 has air vent and gas returning port, and air vent is connected with the refrigerant inlet of oil eliminator 14 by the first pipeline 9, and gas returning port is connected with the refrigerant exit of gas-liquid separator 13, and low gaseous coolant can be promoted to high-pressure gaseous coolant by compressor 1。
Cross valve 2 has exhaust port D, condenser port C, vaporizer port E and suction port S。
The refrigerant inlet of gas-liquid separator 13 connects with the suction port S-phase of cross valve 2, the refrigerant exit of gas-liquid separator 13 is connected with the gas returning port of compressor 1, for the coolant of liquid and refrigeration oil are separated from the coolant of gaseous state, the coolant and the refrigeration oil that prevent liquid enter compressor 1, cause the situation of compressor 1 liquid hammer to occur。
The refrigerant inlet of oil eliminator 14 is connected with the air vent of compressor 1, the refrigerant exit of oil eliminator 14 is connected with the exhaust port D of cross valve 2, refrigeration oil in coolant can be separated, and sub-argument refrigeration oil water conservancy diversion out is returned in compressor 1, avoid because refrigeration oil is taken out of compressor 17 by coolant, cause compressor 17 to lack oil condition and occur。
Outdoor heat exchanger 3 has the first coolant gateway and the second coolant gateway, and the first coolant gateway is connected with the condenser port C of cross valve 2, and the second coolant gateway is connected with main electric expansion valve 4 by second pipe 10。
The Single port of main electric expansion valve 4 is connected with the second coolant gateway of outdoor heat exchanger 3 by second pipe 10, and another port is connected with indoor heat exchanger 5 by the 3rd pipeline 11。
Indoor heat exchanger 5 has the 3rd coolant gateway and the 4th coolant gateway, and the 3rd coolant gateway is connected with the vaporizer port E of cross valve 2, and the 4th coolant gateway is connected by the 3rd pipeline 11 and main electric expansion valve 4。
The Single port of auxiliary electron expansion valve 6 is connected with the first pipeline 9 by the 4th pipeline 12, and another port is connected with second pipe 10。
Single port and the 4th pipeline 12 of feather valve 7 are connected, and another port is connected with the 3rd pipeline 11。
Temperature sensing device 8 is used for detecting outdoor environment temperature or outdoor heat exchange actuator temperature, and controls the aperture of main electric expansion valve 4, the aperture of auxiliary electron expansion valve 6 and being turned on and off of feather valve 7 according to outdoor environment temperature or outdoor heat exchange actuator temperature。
Air conditioning system provided by the invention, by adding auxiliary electron expansion valve 6 and feather valve 7 in whole air conditioning system, make the air conditioning system can according to different situations, change the break-make of auxiliary electron expansion valve 6 and feather valve 7 place pipeline, realize the switching of air conditioning system different mode, thus improve the comfort of product。
A specific embodiment according to the present invention, temperature sensing device 8 includes: the first temperature sensor the 801, second temperature sensor 802 and controller 803;When air conditioning system is under refrigeration mode, first temperature sensor 801 is for the ambient temperature outside sensing chamber, and obtain outdoor environment temperature value, controller 803 receiving chamber external environment temperature value, and control the aperture of main electric expansion valve 4, the aperture of auxiliary electron expansion valve 6 and being turned on and off of feather valve 7 according to outdoor environment temperature value;When air conditioning system is under heating mode, second temperature sensor 802 is for detecting the temperature of outdoor unit heat exchanger, and obtain outdoor heat exchanger temperature value, controller 803 receiving chamber external heat exchanger temperature value, and control the aperture of main electric expansion valve 4, the aperture of auxiliary electron expansion valve 6 and being turned on and off of feather valve 7 according to outdoor heat exchanger temperature value。
In this embodiment, the advantage such as the temperature sensing device 8 being made up of controller 803 and sensor has simple in construction, capacity of resisting disturbance is strong, control accuracy is high and response speed is fast, thus improve the accuracy of detection of temperature sensing device 8, and then improving system reliability, adding the market competitiveness。
In one particular embodiment of the present invention, feather valve 7 is electromagnetic valve。
In this embodiment, electromagnetic valve uses general, and cheap, safety, reaction sensitivity, thus when meeting instructions for use, reducing manufacturing cost。
The control method of air conditioning system according to some embodiments of the invention is described referring to Fig. 3 and Fig. 4。
As it is shown on figure 3, the control method of air conditioning system provided by the invention includes:
Step 100, receives user and selects the instruction of air conditioning system mode of operation;
Step 1021A, when air conditioning system is under refrigeration work pattern, the first temperature sensor 801 in air conditioning system works;
Step 1022A, the first temperature sensor 801 detects outdoor environment temperature, and obtains outdoor environment temperature value;
Step 1041A, controller 803 receiving chamber external environment temperature value, and by outdoor environment temperature value compared with the first preset value;
Step 1042A, when outdoor environment temperature value is be more than or equal to the first preset value, controller 803 controls that main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 cuts out, feather valve 7 cuts out;When outdoor environment temperature value is less than the first preset value, controller 803 controls that main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 cuts out, feather valve 7 is opened。
Specifically, when using air conditioner refrigerating summer, due to outdoor temperature higher time, main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 and feather valve 7 are closed, all coolant in system are used for condensing heat release refrigeration, air-conditioning is made to be in full load refrigeration mode, when using air conditioner refrigerating at transition season (such as autumn), owing to indoor humidity is bigger, main electric expansion valve 4 and feather valve 7 are opened, auxiliary electron expansion valve 6 cuts out, coolant in system is divided into two parts, Part I coolant condenses heat release by outdoor heat exchanger 3, Part II coolant directly out mix with the Part I after condensation heat release from compressor 1 after heat exchanger 5 in inlet chamber, Part II coolant uninstalls a part of cold of Part I coolant, air conditioning system is made to be in low temperature Smaller load refrigeration mode, thus avoiding owing to indoor heat exchanger 5 temperature is too low, there is condensation in indoor heat exchanger 5, cause that anti-freeze is protected, the situation of outer machine frequent start-stop occurs。
As shown in Figure 4, the control method of air conditioning system provided by the invention includes:
Step 100, receives user and selects the instruction of air conditioning system mode of operation;
Step 1021B, when air conditioning system is in and heats under mode of operation, the second temperature sensor 802 in air conditioning system works;
Step 1022B, the second temperature sensor 802 is for sensing chamber's external heat exchanger temperature, and obtains outdoor heat exchanger temperature value;
Step 1041B, controller 803 receiving chamber external heat exchanger temperature value, and by outdoor heat exchanger temperature value respectively compared with the second preset value and the 3rd preset value;
Step 1042B, when outdoor heat exchanger temperature value is more than the second preset value, controller 803 controls that main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 cuts out, feather valve 7 cuts out;When outdoor heat exchanger temperature value is less than or equal to the second preset value and be more than or equal to three preset values, controller 803 controls that main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 is opened, feather valve 7 cuts out, and the aperture of main electric expansion valve 4 is more than the aperture of auxiliary electron expansion valve 6;When outdoor heat exchanger temperature value is less than three preset values, controller 803 controls that main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 is opened, feather valve 7 cuts out, and the aperture of main electric expansion valve 4 is less than the aperture of auxiliary electron expansion valve 6。
Specifically, when using air-conditioning heating winter, main electric expansion valve 4 is opened, and auxiliary electron expansion valve 6 and feather valve 7 are closed, and in system, all coolant are all used for heating, and makes air-conditioning be in full load heating mode。
When outdoor heat exchanger temperature value is less than or equal to the second preset value and be more than or equal to three preset values, auxiliary electron expansion valve 6 and main electric expansion valve 4 are opened, feather valve 7 cuts out, and the aperture of main electric expansion valve 4 is less than the aperture of auxiliary electron expansion valve 6, coolant in system is divided into two parts, Part I coolant condenses heat release by indoor heat exchanger 5, Part II coolant directly from compressor 1 out with condensation heat release after Part I coolant mix after inlet chamber external heat exchanger 3, Part II coolant improves the temperature of Part I coolant, wherein, coolant in system is mainly used in condensing heating, air conditioning system is in low-temperature heating pattern, slow down the speed of outdoor heat exchanger 3 frosting, namely defrosting cycle is extended, thus avoiding on off-premises station without frosting or there is less frosting, and the situation that air conditioning system enters defrosting mode occurs。
When outdoor heat exchanger temperature value is less than three preset values, i.e. air-conditioner outdoor unit frosting, auxiliary electron expansion valve 6 and main electric expansion valve 4 are opened, feather valve 7 cuts out, and the aperture of main electric expansion valve 4 is less than the aperture of auxiliary electron expansion valve 6, coolant in system is divided into two parts, Part I coolant condenses heat release by indoor heat exchanger 5, Part II coolant directly from compressor 1 out with condensation heat release after Part I coolant mix after inlet chamber external heat exchanger 3, coolant in system is mainly used in heating and defrosting, air conditioning system is in heating and defrosting pattern, indoor are persistently heated by this kind of pattern air conditioning system while defrosting, thus avoiding environment heat absorption indoor to occur to the situation of outdoor heat exchanger 3 defrost, improve the comfort of user, and then improve the market competitiveness。
The control method of air conditioning system provided by the invention, according to different situations, can change the break-make of auxiliary electron expansion valve 6 and feather valve 7 place pipeline in air conditioning system, it is achieved the switching of air conditioning system different mode, thus improve the comfort of product。
In sum, air conditioning system provided by the invention, by adding auxiliary electron expansion valve 6 and feather valve 7 in the entire system, make the air conditioning system can according to different situations, change the break-make of auxiliary electron expansion valve 6 and feather valve 7 place pipeline, realize the switching of air conditioning system different mode, thus improve the comfort of product, specifically, when using air conditioner refrigerating summer, due to outdoor temperature higher time, main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 and feather valve 7 are closed, in system, all coolant are all used for condensing heat release refrigeration, air-conditioning is made to be in full load refrigeration mode, when using air conditioner refrigerating at transition season, such as autumn, owing to indoor humidity is bigger, main electric expansion valve 4 and feather valve 7 are opened, auxiliary electron expansion valve 6 cuts out, coolant in system is divided into two parts, Part I coolant condenses heat release by outdoor heat exchanger 3, Part II coolant directly out mix with the Part I after condensation heat release from compressor 1 after heat exchanger 5 in inlet chamber, Part II coolant uninstalls the cold of Part I coolant, air conditioning system is made to be in low temperature Smaller load refrigeration mode, thus avoiding owing to indoor heat exchanger 5 temperature is too low, there is condensation in indoor heat exchanger 5, cause that anti-freeze is protected, the situation of outer machine frequent start-stop occurs;When using air-conditioning heating winter, main electric expansion valve 4 is opened, auxiliary electron expansion valve 6 and feather valve 7 are closed, in system, all of coolant is all used for heating, air-conditioning is made to be in full load refrigeration mode, after a period of time, after outdoor heat exchanger 3 arrives uniform temperature, auxiliary electron expansion valve 6 and main electric expansion valve 4 are opened, feather valve 7 cuts out, and the aperture of main electric expansion valve 4 is less than the aperture of auxiliary electron expansion valve 6, coolant in system is divided into two parts, Part I coolant condenses heat release by indoor heat exchanger 5, Part II coolant directly from compressor 1 out with condensation heat release after Part I coolant mix after inlet chamber external heat exchanger 3, Part II coolant improves the temperature falling Part I coolant, wherein, coolant in system is mainly used in condensing heating, air conditioning system is in low-temperature heating pattern, slow down the speed of outdoor heat exchanger 3 frosting, namely defrosting cycle is extended, thus avoiding on off-premises station without frosting or there is less frosting, and the situation that air conditioning system enters defrosting mode occurs;Air-conditioner outdoor unit frosting after a period of time, auxiliary electron expansion valve 6 and main electric expansion valve 4 are opened, feather valve 7 cuts out, and the aperture of main electric expansion valve 4 is less than the aperture of auxiliary electron expansion valve 6, coolant in system is divided into two parts, Part I coolant condenses heat release by indoor heat exchanger 5, Part II coolant directly from compressor 1 out with condensation heat release after Part I coolant mix after inlet chamber external heat exchanger 3, coolant in system is mainly used in heating and defrosting, air conditioning system is in heating and defrosting pattern, indoor are persistently heated by this kind of pattern air conditioning system while defrosting, environment heat absorption indoor is avoided to occur to the situation of outdoor heat exchanger 3 defrost, thus improve the comfort of user, and then improve the market competitiveness。
In the present invention, term " first ", " second ", " the 3rd ", " the 4th " only for descriptive purposes, and it is not intended that instruction or hint relative importance。The term such as term " installation ", " being connected ", " connection ", " fixing " all should be interpreted broadly, for instance, " connection " can be fixing connection, it is also possible to is removably connect, or connects integratedly;" be connected " can be joined directly together logical, it is also possible to be indirectly connected to lead to by intermediary。For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be。
In the description of this specification, specific features, structure, material or feature that the description of term " embodiment ", " some embodiments ", " specific embodiment " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention。In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example。And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example。
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations。All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。

Claims (8)

1. an air conditioning system, it is characterised in that including:
Compressor, described compressor has air vent and gas returning port, and described compressor is for compression refrigerant;
Cross valve, described cross valve has exhaust port D, condenser port C, vaporizer port E and suction port S, and described exhaust port D is connected with described air vent by the first pipeline, and described suction port S is connected with described gas returning port;
Outdoor heat exchanger, described outdoor heat exchanger has the first coolant gateway and the second coolant gateway, and described first coolant gateway is connected with described condenser port C;
Main electric expansion valve, the Single port of described main electric expansion valve is connected with described second coolant gateway by second pipe;
Indoor heat exchanger, described indoor heat exchanger has the 3rd coolant gateway and the 4th coolant gateway, described 3rd coolant gateway is connected with described vaporizer port E, and described 4th coolant gateway is connected by the another port of the 3rd pipeline with described main electric expansion valve;
Auxiliary electron expansion valve, the Single port of described auxiliary electron expansion valve is connected with described first pipeline by the 4th pipeline, and another port is connected with described second pipe;
Feather valve, the Single port of described feather valve is connected with described 4th pipeline, and another port is connected with described 3rd pipeline;With
Temperature sensing device, described temperature sensing device is used for detecting outdoor environment temperature or outdoor heat exchange actuator temperature, and controls the aperture of described main electric expansion valve, the aperture of described auxiliary electron expansion valve and being turned on and off of described feather valve according to outdoor environment temperature or outdoor heat exchange actuator temperature。
2. air conditioning system according to claim 1, it is characterised in that
Temperature sensing device includes: the first temperature sensor, the second temperature sensor and controller;
When described air conditioning system is under refrigeration mode, described first temperature sensor is for the ambient temperature outside sensing chamber, and obtain outdoor environment temperature value, described controller receiving chamber external environment temperature value, and control the aperture of described main electric expansion valve, the aperture of described auxiliary electron expansion valve and being turned on and off of described feather valve according to outdoor environment temperature value;
When described air conditioning system is under heating mode, described second temperature sensor is for detecting the temperature of outdoor unit heat exchanger, and obtain outdoor heat exchanger temperature value, described controller receiving chamber external heat exchanger temperature value, and control the aperture of described main electric expansion valve, the aperture of described auxiliary electron expansion valve and being turned on and off of described feather valve according to outdoor heat exchanger temperature value。
3. the air conditioning system according to claim 2, it is characterised in that also include:
Gas-liquid separator, described gas-liquid separator is arranged between described suction port S and the described gas returning port of described compressor of described cross valve。
4. air conditioning system according to claim 3, it is characterised in that also include:
Oil eliminator, described oil eliminator is arranged on described first pipeline, and the gas outlet of described oil eliminator is connected with described auxiliary electron expansion valve and cross valve exhaust port D, and air inlet is connected with the described air vent of described compressor。
5. air conditioning system according to claim 4, it is characterised in that
Described feather valve is electromagnetic valve。
6. the control method of an air conditioning system, it is characterised in that including:
Step 100, receives user and selects the instruction of air conditioning system mode of operation;
Step 102, when described air conditioning system is in running order, is detected outdoor environment temperature or the second temperature sensor sensing chamber external heat exchanger temperature, and obtains outdoor environment temperature value or outdoor heat exchanger temperature value by the first temperature sensor;
Step 104, controller controls the aperture of main electric expansion valve, the aperture of auxiliary electron expansion valve and being turned on and off of feather valve according to outdoor environment temperature value or outdoor heat exchanger temperature value;
Wherein, when air conditioning system is under refrigeration mode, step 102 specifically includes:
Step 1021A, the described first temperature sensor work in air conditioning system;
Step 1022A, described first temperature sensor detection outdoor environment temperature, and obtain outdoor environment temperature value;
Step 104 specifically includes:
Step 1041A, controller receiving chamber external environment temperature value, and by outdoor environment temperature value compared with the first preset value;
Step 1042A, when outdoor environment temperature value is be more than or equal to the first preset value, the described controller described main electric expansion valve of control is opened, auxiliary electron expansion valve cuts out, feather valve cuts out;When outdoor environment temperature value is less than the first preset value, the described controller described main electric expansion valve of control is opened, described auxiliary electron expansion valve cuts out, described feather valve is opened。
7. the control method of an air conditioning system, it is characterised in that including:
Step 100, receives user and selects the instruction of air conditioning system mode of operation;
Step 102, when described air conditioning system is in running order, is detected outdoor environment temperature or the second temperature sensor sensing chamber external heat exchanger temperature, and obtains outdoor environment temperature value or outdoor heat exchanger temperature value by the first temperature sensor;
Step 104, controller controls the aperture of main electric expansion valve, the aperture of auxiliary electron expansion valve and being turned on and off of feather valve according to outdoor environment temperature value or outdoor heat exchanger temperature value;
Wherein, when air conditioning system is under heating mode, step 102 specifically includes:
Step 1021B, the described second temperature sensor work in air conditioning system;
Step 1022B, described second temperature sensor is used for sensing chamber's external heat exchanger temperature, and obtains outdoor heat exchanger temperature value。
8. the control method of air conditioning system according to claim 7, it is characterised in that
Step 104 particularly as follows:
Step 1041B, controller receiving chamber external heat exchanger temperature value, and by outdoor heat exchanger temperature value respectively compared with the second preset value and the 3rd preset value;
Step 1042B, when outdoor heat exchanger temperature value is more than the second preset value, the described controller described main electric expansion valve of control is opened, described auxiliary electron expansion valve cuts out, described feather valve cuts out;When outdoor heat exchanger temperature value is less than or equal to the second preset value and be more than or equal to three preset values, open, described auxiliary electron expansion valve is opened by described main electric expansion valve for the control of described controller, described feather valve cuts out, and the aperture of described main electric expansion valve is more than the aperture of described auxiliary electron expansion valve;When outdoor heat exchanger temperature value is less than three preset values, open, described auxiliary electron expansion valve is opened by described main electric expansion valve for the control of described controller, described feather valve cuts out, and the aperture of described main electric expansion valve is less than the aperture of described auxiliary electron expansion valve。
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CN108644983B (en) * 2018-05-15 2021-04-27 广东Tcl智能暖通设备有限公司 Multi-split air conditioning system and control method and control device thereof
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