CN105674641B - Air-conditioning system and the method for automatically adjusting the actual refrigerant charge of air-conditioning system - Google Patents
Air-conditioning system and the method for automatically adjusting the actual refrigerant charge of air-conditioning system Download PDFInfo
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- CN105674641B CN105674641B CN201410659795.7A CN201410659795A CN105674641B CN 105674641 B CN105674641 B CN 105674641B CN 201410659795 A CN201410659795 A CN 201410659795A CN 105674641 B CN105674641 B CN 105674641B
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- 230000001105 regulatory effect Effects 0.000 claims description 42
- 238000005192 partition Methods 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 28
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- 238000001704 evaporation Methods 0.000 claims description 16
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of air-conditioning system and its computational methods and preferred scope of relevant design parameter, the circulating line of the air-conditioning system is connected with regulation tank, flexible separator is set in tank is adjusted, regulation tank is separated into the two parts sealed against each other by separator, a portion is pre-charged with gas, another part can be used for storing refrigerant, and the part for storing refrigerant connects with circulating line.When air-conditioning system works under different operating modes, the pressure change of refrigerant of the circulating line with adjusting tank junction is flowed through in circulating line, the amount for enabling to adjust the refrigerant stored in tank changes, so that the refrigerant charge in circulating line is equal or close to the optimum matching point of each operating mode, so as to improve efficiency of the air-conditioning in each operating mode, reach preferable refrigerating/heating effect.
Description
Technical Field
The invention relates to an air conditioner, in particular to matching of refrigerant charging amount of the air conditioner.
Background
The electromagnetic four-way valve in the air conditioning system can change the flowing direction of the refrigerant, so that the air conditioner can refrigerate at high temperature and can also heat at low temperature, and the air conditioner has two purposes. When the air conditioner operates in a refrigerating mode, low-temperature low-pressure refrigerant gas enters the compressor and then is pressurized to be changed into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas is condensed and releases heat in the outdoor heat exchanger (serving as a condenser), the liquid refrigerant with the reduced temperature is throttled and reduced in pressure by the throttling device and then changed into low-temperature low-pressure liquid, the low-temperature low-pressure liquid refrigerant absorbs heat in the indoor heat exchanger (serving as an evaporator) and is evaporated to be changed into low-temperature low-pressure gas, then the low-temperature low.
When the air conditioner performs heating operation, low-temperature low-pressure refrigerant gas enters the compressor and is pressurized to be changed into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas is condensed and releases heat in the indoor heat exchanger (used as a condenser), the liquid refrigerant with the reduced temperature is throttled and reduced in pressure by the throttling device and is changed into low-temperature low-pressure liquid, the low-temperature low-pressure liquid refrigerant absorbs heat in the outdoor heat exchanger (used as an evaporator) and is evaporated to be changed into low-temperature low-pressure gas, and then the low-temperature low-pressure.
As described above, when the air conditioner performs cooling, the outdoor unit functions as a condenser and the indoor unit functions as an evaporator; in heating, the outdoor unit functions as an evaporator and the indoor unit functions as a condenser. In fact, the outdoor heat exchanger is much larger than the indoor heat exchanger, and the refrigerant is mainly distributed in the condenser, so that the amount of refrigerant required for cooling is larger than that required for heating.
In addition, during refrigeration or heating, the air conditioner can also operate under two working conditions of high frequency or low frequency. When the air conditioner operates at high frequency, the flow rate of the refrigerant is high, the liquid content is low, and the refrigerant distribution amount in the heat exchanger is small; and when the compressor operates at low frequency, the flow rate of the refrigerant is low, the liquid content is high, and the refrigerant distribution amount in the heat exchanger is high, so that the amount of the refrigerant required by the compressor during low frequency operation is larger than that during high frequency operation.
The refrigerant charge is closely related to the operating characteristics of the air conditioning system, the normal operation of the air conditioning system depends on whether the amount of the charged refrigerant is proper, and the optimal matching charge of the refrigerant required by the air conditioner under different working conditions of refrigeration, heating, high frequency and low frequency is different. Therefore, there is an urgent need in the art to develop an air conditioning system capable of automatically adjusting the refrigerant charge amount under different working conditions, so that the air conditioner can automatically adjust the refrigerant charge amount to the optimal matching value under each working condition, and the working characteristics of the air conditioner are more perfect.
Disclosure of Invention
The invention aims to provide an air conditioning system which can automatically adjust the actual refrigerant charge quantity in the air conditioning system in real time.
The invention provides an air conditioning system, which comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a circulating pipeline,
a regulating tank is connected to the circulation pipe, a partition is arranged in the regulating tank, the partition divides the regulating tank into two parts which are sealed with each other, one part is pre-filled with gas, the other part is used for storing refrigerant, the part for storing the refrigerant is in fluid communication with the circulation pipe, and the partition can be deformed so as to change the volumes of the two parts; wherein,
when the air conditioning system works under different working conditions, the pressure of the refrigerant flowing through the joint of the circulating pipeline and the adjusting tank in the circulating pipeline is changed, so that the separating piece can be deformed, the amount of the refrigerant stored in the adjusting tank is changed, and the refrigerant filling amount in the circulating pipeline is changed.
In a preferred embodiment, the conditioning tank comprises a first conditioning tank connected to the circulation pipe between the outdoor heat exchanger and the throttling device; and/or the conditioning tank comprises a second conditioning tank connected to the circulation conduit between the indoor heat exchanger and the throttling device.
The first adjusting tank is used for storing partial refrigerant under the high-frequency refrigeration working condition, so that the amount of the refrigerant working in the circulating pipeline is equal to or close to the optimal matching value of the refrigerant charging amount of the air-conditioning system under the current refrigeration working condition; the first adjusting tank discharges part of the refrigerant under the low-frequency refrigeration working condition, so that the amount of the refrigerant working in the circulating pipeline is equal to or close to the optimal matching value of the refrigerant charging amount of the air-conditioning system under the current refrigeration working condition; and/or
The second adjusting tank is used for storing partial refrigerant under the high-frequency heating working condition, so that the amount of the refrigerant working in the circulating pipeline is equal to or close to the optimal matching value of the refrigerant charging amount of the air conditioning system under the current heating working condition; and the second regulating tank discharges part of the refrigerant under the low-frequency heating working condition, so that the amount of the refrigerant working in the circulating pipeline is equal to or close to the optimal matching value of the refrigerant charging amount of the air conditioning system under the current heating working condition.
In a preferred embodiment, the total refrigerant charge in the air conditioning system is greater than or equal to the refrigerant best matching charge of the air conditioning system under the intermediate refrigeration condition.
In a preferred embodiment, the conditioning tank is pre-filled with gas before being connected to the circulation pipe, and the partition is deformed to abut against a portion of the conditioning tank wall so that the portion of the conditioning tank for storing refrigerant has no volume.
In a preferred embodiment, the pre-charge pressure of the gas in the pre-filled conditioning tank meets the following requirements:
(a) the pre-charging pressure in the first adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the heating working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the rated refrigerating working condition; and/or
(b) The pre-charging pressure in the second adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the refrigeration working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the intermediate heating working condition.
In a preferred embodiment, the pre-charging pressure in the first adjusting tank is lower than or equal to the condensing pressure of the refrigerant in the middle refrigerating condition of the air conditioning system.
In a preferred embodiment, when the total refrigerant charge in the air conditioning system is equal to the refrigerant best matching charge of the air conditioning system under the intermediate refrigeration condition, the pre-charge pressure in the first regulation tank may be higher than or equal to the condensation pressure of the refrigerant under the intermediate refrigeration condition.
In a preferred embodiment, the maximum evaporation pressure of the refrigerant in the heating condition of the air conditioning system refers to the pressure of the refrigerant in the circulating pipeline between the throttling device and the outdoor heat exchanger in the low-frequency heating condition of the air conditioning system.
In a preferred embodiment, the condensing pressure of the refrigerant when the air conditioning system is in the rated cooling condition refers to the pressure of the refrigerant in the circulating pipeline between the throttling device and the outdoor heat exchanger when the air conditioning system is in the rated cooling condition.
In a preferred embodiment, the maximum evaporation pressure of the refrigerant in the cooling condition of the air conditioning system refers to the pressure of the refrigerant in the circulating pipeline between the throttling device and the indoor heat exchanger in the low-frequency cooling condition of the air conditioning system.
In a preferred embodiment, the condensing pressure of the refrigerant when the air conditioning system is in the intermediate heating condition refers to the pressure of the refrigerant in the circulating pipeline between the throttling device and the indoor heat exchanger when the air conditioning system is in the intermediate cooling condition.
In a preferred embodiment, when the air conditioning system is in a refrigeration working condition, the second regulating tank does not store a refrigerant, when the air conditioning system is in a high-frequency refrigeration working condition, the first regulating tank stores a refrigerant, and when the air conditioning system is in a low-frequency refrigeration working condition, the amount of the refrigerant stored in the first regulating tank is smaller than the amount of the refrigerant stored in the first regulating tank under the high-frequency refrigeration working condition or the refrigerant is not stored; and/or
When the air conditioning system is in a heating working condition, the first adjusting tank does not store the refrigerant, and when the air conditioning system is in a high-frequency heating working condition, the second adjusting tank stores the refrigerant; when the air conditioning system is in a low-frequency heating working condition, the amount of the refrigerant stored in the second adjusting tank is smaller than that of the refrigerant stored in the second adjusting tank under the high-frequency heating working condition.
The high-frequency refrigeration working condition refers to a refrigeration working condition that the refrigeration quantity of the air conditioner is higher than or equal to the rated refrigeration quantity; the low-frequency refrigeration working condition refers to a refrigeration working condition that the refrigeration capacity of the air conditioner is lower than or equal to the intermediate refrigeration capacity;
the high-frequency heating working condition refers to a heating working condition that the heating capacity of the air conditioner is higher than or equal to the rated heating capacity; the low-frequency heating working condition refers to a heating working condition that the heating quantity of the air conditioner is lower than or equal to the intermediate heating quantity.
In a preferred embodiment, the material used for manufacturing the conditioning tank and the partition has one or more characteristics selected from the group consisting of:
compatible with refrigerants and refrigeration oils;
the temperature resistance range is-20 ℃ to 150 ℃;
can bear the pressure higher than 5 MPa.
In a preferred embodiment, the material used to make the separator is selected from one or more of the following materials: neoprene, nitrile rubber, ethylene propylene diene monomer, hypalon, fluororubber and polytetrafluoroethylene; and/or
The partition is deformed to expand the portion of the conditioning tank for storing the refrigerant to a two-thirds conditioning tank volume; and/or
The material used to make the can body may be selected from one or more of the following:
cast iron, cast aluminum, carbon steel, stainless steel, copper, and alloys; and/or
The gas is nitrogen or air.
In a preferred embodiment, the separator is a membrane structure having elasticity.
The invention also provides a method for automatically adjusting the actual refrigerant charge amount of an air-conditioning system, wherein the air-conditioning system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a circulating pipeline, and the method comprises the following steps: the circulating pipeline is connected with a regulating tank;
a partition is arranged in the regulating tank and divides the regulating tank into two parts which are sealed with each other, wherein one part is pre-filled with gas, the other part can be used for storing refrigerant, the part for storing the refrigerant is communicated with the circulating pipeline in a fluid mode, and the partition can be deformed, so that the volumes of the two parts are changed;
when the air conditioning system works under different working conditions, the pressure of the refrigerant flowing through the joint of the circulating pipeline and the adjusting tank in the circulating pipeline is changed, so that the amount of the refrigerant stored in the adjusting tank is changed, and the refrigerant filling amount in the circulating pipeline is changed.
In a preferred embodiment, in the above method, a first conditioning tank is connected to the circulation pipe between the outdoor heat exchanger and the throttling device, and a second conditioning tank is connected to the circulation pipe between the indoor heat exchanger and the throttling device.
In a preferred embodiment, in the above method, the conditioning tank is pre-filled with gas before being connected to the circulation line, the pre-charge pressure of the gas in the pre-filled conditioning tank satisfying the following requirements:
(a) the pre-charging pressure in the first adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the heating working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the rated refrigerating working condition; and/or
(b) The pre-charging pressure in the second adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the refrigeration working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the intermediate heating working condition.
In a preferred embodiment, in the above method, the pre-charge pressure in the first conditioning tank is lower than or equal to the condensing pressure of the refrigerant in the intermediate refrigeration condition of the air conditioning system.
In a preferred embodiment, in the above method, the material for manufacturing the conditioning tank and the partition has one or more characteristics selected from the group consisting of:
compatible with refrigerants and refrigeration oils;
the temperature resistance range is-20 ℃ to 150 ℃;
can bear the pressure higher than 5 MPa.
In a preferred embodiment, in the above method, the material of which the separator is made may be selected from one or more of the following materials:
neoprene, nitrile rubber, ethylene propylene diene monomer, hypalon, fluororubber and polytetrafluoroethylene; and/or
The material used to make the can body may be selected from one or more of the following:
cast iron, cast aluminum, carbon steel, stainless steel, copper, and alloys; and/or
The gas is nitrogen or air.
In a preferred embodiment, in the above method, the method further comprises determining a pre-charge volume and a pre-charge pressure of the regulation tank:
(1) providing data of pressure and temperature of refrigerant flowing through the connection part of the circulating pipeline and the regulating tank in the circulating pipeline under each working condition of the air conditioning system;
(2) providing optimal refrigerant filling matching values of all working conditions of the air conditioning system;
(3) determining the pre-charge pressure of the regulation tank according to the pressure and temperature data provided in the step (1) and the pre-charge pressure requirement, and calculating the pre-charge volume of the regulation tank through a gas state equation.
The gas state equation comprises an ideal gas state equation and/or a gas state equation corrected for actual gas.
In a preferred embodiment, the operating conditions include four operating conditions, namely low-frequency cooling, high-frequency cooling, low-frequency heating and high-frequency heating.
In a preferred embodiment, the volume of the regulating tank should be as small as possible in case the pre-charge pressure meets the above pre-charge pressure requirement.
In a preferred embodiment, in the above method, the total refrigerant charge in the air conditioning system is greater than or equal to the refrigerant optimum matching charge of the air conditioning system under the intermediate refrigeration condition, wherein
The total refrigerant charge of the air conditioning system with the rated refrigerating capacity of 2600W is about 700 to about 900 g; and/or
The total refrigerant charge of the air conditioning system with the rated refrigerating capacity of 3500W is about 1000 to about 1200 g; and/or
The total refrigerant charge of the air conditioning system with the rated refrigerating capacity of 5000W is about 1400 to 1800 g; and/or
The total refrigerant charge of the air conditioning system with rated refrigerating capacity of 7200W is about 2000-2400 g; and/or
The total refrigerant charge for an air conditioning system rated at 12000W is about 3600 to about 4000 g.
Rated refrigeration, intermediate refrigeration, rated heating, and intermediate heating are common names for the refrigeration industry, wherein,
the refrigeration energy efficiency ratio of the air conditioning system under the rated refrigeration working condition is twice of that of the air conditioning system under the intermediate refrigeration working condition;
the heating energy efficiency ratio of the air conditioning system under the rated heating working condition is twice of the heating energy efficiency ratio of the air conditioning system under the intermediate heating working condition.
In a preferred embodiment, in the above method, the gas pre-charge pressure of the first conditioning tank is about 1.25 to about 3.0MPa, and/or
The second conditioning tank has a gas pre-charge pressure of about 0.75 to about 2.25 MPa.
In a preferred embodiment, in the above method, when the rated cooling capacity of the air conditioning system is 2600W, the pre-charge volume of the first conditioning tank is about 400 to about 700ml, and the pre-charge volume of the second conditioning tank is 100 to 400 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 3500W, the pre-charging volume of the first adjusting tank is 500-900 ml, and the pre-charging volume of the second adjusting tank is about 200-500 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 5000W, the pre-charging volume of the first adjusting tank is 800-1200 ml, and the pre-charging volume of the second adjusting tank is about 300-600 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 7200W, the pre-charging volume of the first adjusting tank is 1000-1500 ml, and the pre-charging volume of the second adjusting tank is about 400-800 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 12000W, the pre-charging volume of the first adjusting tank is 2000-3000 ml, and the pre-charging volume of the second adjusting tank is about 500-1200 ml.
In a preferred embodiment, in the above method, when the air conditioning system is in the high-frequency refrigeration condition, the refrigerant charge in the circulation pipeline, the refrigerant storage capacity in the first conditioning tank and the refrigerant storage capacity in the second conditioning tank are respectively about 90% to about 95%, about 5% to about 10% and 0% of the total refrigerant charge of the air conditioning system by mass; and/or
When the air-conditioning system is in a low-frequency refrigeration working condition, the refrigerant charge in the circulating pipeline, the refrigerant storage capacity in the first adjusting tank and the refrigerant storage capacity in the second adjusting tank account for 100%, 0% and 0% of the total refrigerant charge of the air-conditioning system respectively in percentage by mass; and/or
When the air conditioning system is in a high-frequency heating working condition, the refrigerant filling amount in the circulating pipeline, the refrigerant storage amount in the first adjusting tank and the refrigerant storage amount in the second adjusting tank respectively account for about 80 to about 85 percent, 0 percent and about 15 to about 20 percent of the total refrigerant filling amount of the air conditioning system in percentage by mass; and/or
When the air conditioning system is in a low-frequency heating working condition, the refrigerant filling amount in the circulating pipeline, the refrigerant storage amount in the first adjusting tank and the refrigerant storage amount in the second adjusting tank account for about 85 to about 90 percent, 0 percent and about 10 to about 15 percent of the total refrigerant filling amount of the air conditioning system by mass percent respectively.
The air conditioning system can automatically adjust the actual refrigerant charge of the system under the refrigerating and heating working conditions and when the compressor operates at low frequency and high frequency, and improves the system efficiency.
Drawings
FIG. 1 is a schematic diagram of an air conditioner with the present invention having an automatically adjusting refrigerant charge in a refrigeration condition with the compressor operating at high frequency;
FIG. 2 is a schematic diagram of an air conditioner with the present invention having an automatically adjusting refrigerant charge in a cooling condition with the compressor operating at low frequency;
FIG. 3 is a schematic diagram of an air conditioner with the present invention having an automatically adjusting refrigerant charge in a heating mode with a compressor operating at high frequency; and
fig. 4 is a schematic diagram of an air conditioner having an automatically adjusting refrigerant charge of the present invention in a heating mode with a compressor operating at a low frequency.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
Air conditioner capable of automatically adjusting refrigerant charging quantity
According to the description in the background art, the optimal matching and charging amount of the refrigerant of the air conditioning system under the refrigerating working condition is larger than that under the heating working condition; and the optimal matching charge of the refrigerant when the compressor operates at low frequency is larger than that when the compressor operates at high frequency.
The inventor creatively adds simple accessories (namely a regulating tank filled with gas) in the traditional air conditioning system, and determines parameters such as the volume, the charging quantity and the like of the regulating tank through calculation and experiments, so that the air conditioning system has the function of automatically regulating the refrigerant charging quantity under different working conditions, thereby meeting the requirements. Preferred embodiments of the present invention are described below.
The conventional air conditioning system mainly comprises a compressor 1, a liquid storage tank 2, a four-way valve 3, an outdoor heat exchanger 4, an indoor heat exchanger 5, a throttling device 6 and a circulating pipeline. In the embodiment of the invention shown in fig. 1-4, a first conditioning tank 7 and a second conditioning tank 7' are connected to the air conditioning system at positions P1 and P2, respectively. Each regulating tank can be connected with a circulating pipeline of the air conditioning system through a three-way pipe.
In the preferred embodiment of the present invention, the first conditioning tank 7 or the second conditioning tank 7' can be separately present in the circulation line, both of which enable the thermal air conditioner to function as a certain self-regulating refrigerant charge.
Each adjusting tank is provided with a separator 8 for separating the adjusting tank into two parts which are mutually sealed, the part above the separator 8 in the adjusting tank is used for storing gas 9, and after the adjusting tank is pre-filled with a proper amount of gas, the gas storage part is kept sealed with the outside; the portion below the partition 8 is in fluid communication with a circulation duct of the air conditioner, and the portion below the partition 8 is capable of storing a certain amount of refrigerant 10 under some conditions.
The material used to make the can body and the partition has one or more characteristics selected from the group consisting of:
compatible with refrigerants and refrigeration oils;
the temperature resistance range is-20 ℃ to 150 ℃;
the compressive strength is higher than 5 MPa.
The partition 8 may take any suitable form as long as it is capable of deforming in the respective directions in accordance with the pressure difference between the gas 9 and the refrigerant 10, thereby changing the volume of the two portions of the conditioning tank divided thereby. Preferably, the separator is a film structure having elasticity.
Preferably, the material from which the partition 8 is made may be selected from one or more of the following materials: neoprene (Neoprene), nitrile rubber (Buna), Ethylene Propylene Diene Monomer (EPDM), Heppalon (Hypalon), fluororubber (Viton, Aflas) and Polytetrafluoroethylene (PTFE).
Preferably, the material from which the can body is made may be selected from one or more of the following: cast iron, cast aluminum, carbon steel, stainless steel, copper, and alloys.
Optionally, the partition of the first conditioning tank 7 is of the same or different material as the partition of the second conditioning tank 7'.
Preferably, the gas filled in the first and second conditioning tanks 7 and 7' is nitrogen or air.
Optionally, the first conditioning tank 7 is pre-charged with gas that is the same or different from the gas that is pre-charged with the second conditioning tank 7'.
Before or after the first and second conditioning tanks 7 and 7' are connected at P1 and P2 of the air conditioning system, refrigerant may be charged into the circulation pipe of the air conditioning system in a total amount equal to the refrigerant optimum matching charge of the air conditioning system at the intermediate refrigeration condition.
It should be noted that, in practice, the total refrigerant charge amount may also be greater than the refrigerant optimum matching charge amount of the air conditioning system under the intermediate refrigeration condition, so as to avoid the occurrence of the situation that the refrigerant charge amount is insufficient under the low-frequency refrigeration condition that the refrigeration capacity of the air conditioning system is less than the intermediate refrigeration condition. The refrigerant entering the conditioning tank described in this embodiment is a liquid refrigerant/hot working fluid.
After the first and second conditioning tanks 7, 7' are pre-filled with gas having a certain pressure value, the two conditioning tanks may be connected to a circulation pipe, respectively. By "prefill" is meant that the gas pressure in the part of the conditioning tank above the partition 8 causes the partition to deform downwards against the wall of the lower conditioning tank, corresponding to the gas filling the entire conditioning tank, while the part of the conditioning tank below the partition has no volume. The pre-filled conditioning tank meets the following requirements:
(1) the pre-charging pressure in the first regulating tank 7 is higher than the maximum evaporating pressure (i.e. the maximum pressure of the refrigerant at P1 under heating condition) of the air-conditioning system and lower than the condensing pressure (i.e. the pressure of the refrigerant at P1 under rated cooling condition) of the air-conditioning system under rated cooling condition
Further, the pre-charge pressure in the first regulation tank 7 is lower than or equal to the condensing pressure when the air conditioning system is in the intermediate cooling condition (i.e. the refrigerant pressure at P1 in the intermediate cooling condition);
(2) the pre-charging pressure in the second adjusting tank 7' is higher than the maximum evaporating pressure of the air conditioning system in the cooling condition (i.e. the refrigerant pressure at P2 in the cooling condition) and lower than the condensing pressure of the air conditioning system in the intermediate heating condition (i.e. the refrigerant pressure at P2 in the intermediate heating condition).
The frequency of the air conditioning system is inversely proportional to the evaporation pressure and directly proportional to the condensation pressure, i.e. the lower the operating frequency of the air conditioner, the higher the evaporation pressure and the lower the condensation pressure.
Fig. 1 and 2 illustrate an air conditioning system in high and low frequency refrigeration operating conditions, respectively, with refrigerant in the circulating conduit flowing in a counterclockwise direction with the refrigerant pressure at position P1 of the conduit being greater than the refrigerant pressure at position P2.
In the invention, the concepts of high-frequency refrigeration, low-frequency refrigeration, high-frequency heating and low-frequency heating are as follows:
the high-frequency refrigeration working condition refers to a refrigeration working condition that the refrigeration quantity of the air conditioner is higher than or equal to the rated refrigeration quantity; the low-frequency refrigeration working condition refers to a refrigeration working condition that the refrigeration capacity of the air conditioner is lower than or equal to the intermediate refrigeration capacity;
the high-frequency heating working condition refers to a heating working condition that the heating capacity of the air conditioner is higher than or equal to the rated heating capacity; the low-frequency heating working condition refers to a heating working condition that the heating quantity of the air conditioner is lower than or equal to the intermediate heating quantity.
Since the pre-charge pressure in the second adjusting tank 7 'is higher than the maximum evaporating pressure possible under the refrigeration condition (i.e. the maximum pressure of the refrigerant at P2 under the refrigeration condition), i.e. whether the refrigeration is high-frequency refrigeration (see fig. 1) or low-frequency refrigeration (see fig. 2), the pre-charge pressure of the gas in the second adjusting tank 7' is always higher than the pressure of the refrigerant at P2 in the pipeline, and the gas in the second adjusting tank 7 'is always kept in a full state, so that the second adjusting tank 7' does not store the refrigerant when the air conditioning system is in the refrigeration condition.
As shown in fig. 1, in the high frequency refrigerating condition, the pre-charge pressure in the first regulation tank 7 is lower than the refrigerant pressure at P1, and part of the refrigerant in the circulation pipe compresses the gas in the first regulation tank 7 by pressing the division member 8 to charge the first regulation tank 7 until the pressures of the gas and the refrigerant at both sides of the division member 8 are equal. After the state is stabilized, the temperature after the gas compression absorbs heat is substantially equal to the temperature of the refrigerant at P1.
As shown in fig. 2, when the high-frequency refrigeration condition is switched to the low-frequency refrigeration condition, the pressure of the refrigerant in the circulation line at P1 is reduced (i.e., the condensing pressure is reduced), and the gas in the adjusting tank 7 is expanded to discharge all or part of the refrigerant stored in the adjusting tank into the circulation line.
Fig. 3 and 4 show the air conditioning system in a heating mode, in which refrigerant in the circulating pipe flows in a clockwise direction, and the refrigerant pressure at the P2 position of the pipe is greater than the refrigerant pressure at the P1 position.
According to the pre-charging pressure requirement of the gas in the adjusting tank, no matter in the high-frequency heating (see fig. 3) or low-frequency heating (see fig. 4) working condition, the pre-charging pressure in the first adjusting tank 7 is always higher than the maximum evaporation pressure (i.e. the maximum pressure of the refrigerant at P1 in the heating working condition) possible when the air conditioning system is in the heating working condition, and the gas in the first adjusting tank 7 is always kept in the pre-charging state, so that the first adjusting tank 7 does not store the refrigerant when the air conditioning system is in the heating working condition.
As shown in fig. 3, in the high frequency heating operation, the pre-charge pressure in the second adjusting tank 7' is lower than the refrigerant pressure at P2, and the surplus refrigerant in the circulation pipe presses the dividing member to compress the gas in the adjusting tank and fills the adjusting tank until the pressures of the gas and the refrigerant at both sides of the dividing member are equal.
As shown in fig. 4, when the high-frequency heating mode is switched to the low-frequency heating mode, the pressure of the refrigerant in the circulation line at P2 is reduced (i.e., the condensing pressure is reduced), and the gas in the second conditioning tank 7 'expands to discharge a part of the refrigerant stored in the second conditioning tank 7' into the circulation line.
It can be seen from the above qualitative description that the amount of the refrigerant stored in the regulation tank can be controlled by the relationship between the refrigerant pressure on the high-pressure side in the circulation pipeline and the gas pressure in the regulation tank, thereby ensuring that the amount of the refrigerant actually working in the air conditioning system conforms to the optimal matching value of the refrigerant charge amount of each different working condition.
In fact, besides the pressure condition, the temperature of different positions of different working conditions of the refrigerant is also considered, and the optimal filling matching value of the refrigerant under different working conditions is combined to determine the volume of the adjusting tank, the pre-charging pressure of the adjusting tank and other relevant parameters, so as to complete the invention.
In order to more fully and specifically disclose the present invention, the calculation and selection method of the related parameters of the volume of the regulating tank, the pre-charging pressure of the regulating tank, etc. will be described with reference to a specific calculation example.
Formula for calculation
For the sake of simplicity of calculation, the gas filled in the portion above the partition in the surge tank (hereinafter simply referred to as "gas") is regarded as an ideal gas, and the calculation is performed using an ideal gas state equation pV ═ nRT, in which,
p is the pressure of the gas and,
v is the volume of the gas,
n is the number of moles of the gas,
r is a molar gas constant and is,
t is the thermodynamic temperature.
Here, the working condition of the air conditioner is simplified into four working conditions of high-frequency heating, low-frequency heating, high-frequency cooling and low-frequency cooling. And the calculation method and formula provided herein are directed to the case where the total refrigerant charge in the air conditioning system is equal to the best matching refrigerant charge for the air conditioning system under low frequency refrigeration conditions. In this case, when the air conditioner is operated in the low-frequency cooling condition, neither the first gas tank nor the second gas tank 7' stores the refrigerant.
Let the pre-filling volume of the first adjusting tank 7 be VAPre-charge pressure level pA(ii) a The pre-filling volume of the second adjusting tank 7' is VBPre-charge pressure level pB. Wherein p isA、pBShould meet the pre-charge pressure requirements described above. It is assumed that the gas temperature at the time of filling the first and second conditioning tanks 7, 7' is the same, and TA＝TB＝25℃(298K)。
In the refrigerating condition, the function of adjusting the refrigerant charge isA regulating tank 7. The pressure P of the refrigerant at the circulating pipeline P1 is known under the condition of high-frequency refrigerationHigh frequency refrigerationAnd temperature THigh frequency refrigeration. Under the assumption of low-frequency refrigeration working condition, the refrigerant is not stored in the regulating tank, and under the high-frequency refrigeration state, the volume of the refrigerant stored in the regulating tank is V1Pressure of gas p1Gas temperature of T1Wherein p is1＝pHigh frequency refrigeration，T1＝THigh frequency refrigeration。
Because the gas in the regulating tank is in a closed state, the mole number of the gas is unchanged, and the following formula can be derived from an ideal gas state equation:
according to the pre-charge pressure requirement, select pAV can be calculatedA。
In the heating working condition, the second adjusting tank 7' plays a role in adjusting the refrigerant charging amount. The pressure P of the refrigerant at the circulating pipeline P2 is known under the high-frequency heating conditionHigh frequency heatingAnd temperature THigh frequency heatingAnd the pressure P of the refrigerant at the circulation line P2 in the low-frequency heating conditionLow frequency heatingAnd temperature TLow frequency heating。
In order to make the refrigerant charge in the circulation system equal to the optimum matching value, the volume of the refrigerant stored in the tank is adjusted to be V under the low-frequency heating condition2Pressure of gas p2Gas temperature of T2Wherein p is2＝pLow frequency heating，T1＝TLow frequency heating(ii) a In the high-frequency heating state, the volume of the refrigerant stored in the tank is adjusted to V3Pressure of gas p3Gas temperature of T3Wherein p is3＝pHigh frequency heating，T3＝THigh frequency heating。
Because the gas in the regulating tank is in a closed state, the mole number of the gas is unchanged, and the following formula can be derived from an ideal gas state equation:
from the above formula, one can obtain:
from this, V can be calculatedBAnd P isB. Note that for calculated PBIt is also verified whether it meets the pre-charge pressure requirement. If PBIf the pre-charging pressure requirement is met, V is determinedBAnd PBThe pre-charge volume for the second regulator tank is at and pre-charge pressure.
If PBThe pre-charging pressure requirement is not met, and the pressure P 'meeting the pre-charging pressure requirement is preferably selected'B. After a plurality of times of trial calculations, the volume of the refrigerant stored in the regulating tank in the low-frequency heating is determined to be V'2The volume of the refrigerant stored in the adjustment tank during high-frequency heating is V'3Pre-charge pressure P'BAnd a precharge volume V'BWherein, V'2、V′3Should be as far as possible separately from V2、V3Are equal.
In addition, the above calculation formula is based on the ideal gas state equation, and the modified krebs equation of the actual gas can be used for calculation.
Examples
With the preferred embodiment described above and according to the above calculation method, a certain brand of air conditioners having a rated cooling capacity of 3500W can be modified to have a function of automatically adjusting the refrigerant charge by determining the volumes and the pre-charge pressures of the first and second conditioning tanks by the following steps:
(1) the refrigerant pressure and temperature data at the positions of the circulating pipelines P1 and P2 when the air conditioner is in different working conditions are obtained, and are shown in the table 1.
TABLE 1
In this embodiment, the four operating conditions of the rated heating, the intermediate cooling, and the rated cooling in the table respectively correspond to the four operating conditions of the high-frequency heating, the low-frequency cooling, and the high-frequency cooling described in the above calculation formula.
(2) And obtaining the optimal refrigerant charge matching value of the air conditioner under each working condition, wherein the optimal matching value of the intermediate refrigeration working condition is 1000g, and the total refrigerant charge of the selected air conditioning system is 1000 g.
(3) Determining the pre-charge pressure p of the first regulating reservoirAAnd a pre-charge volume VA：
According to the pre-charge pressure requirement and the various working condition pressure values in table 1, 25bar is provided<pA<30bar；
The matching value of the refrigerant charge amount of rated refrigeration is 930g, and the volume V of the refrigerant stored in the first adjusting tank under the working condition is converted according to the V as m/rho (rho is the density of the refrigerant)1According to the formula
Calculate the correspondence pAV ofAValues, as shown in table 2.
TABLE 2
| First regulating reservoir Pre-Charge pressure pA/bar | First regulating tank volume VA/ml |
| 26 | 732.8 |
| 27 | 1152 |
| 28 | 2697 |
The regulating tank design is intended to be as small as possible, so 26bar is chosen as the pre-charge pressure p of the first regulating tankACorresponding regulating tank volume VA＝732.8ml。
(4) Determining the pre-charge pressure p of the first regulating reservoirAAnd a pre-charge volume VA：
According to the pre-charge pressure requirement and the working condition pressure values in the table 1, 11bar is provided<pB<21bar；
Determining V according to the optimal matching value of the intermediate heating working condition and the rated heating2And V3And using a formula
Calculating PBDue to calculated PBIf the value of (1) does not meet the pre-charging pressure requirement, selecting a pressure value between 11 and 21bar as the pre-charging pressure of the second adjusting tank, and selecting a pressure value close to V2And V3As the refrigerant storage volume in the regulating tank, when the formula is satisfied
Under the condition of (1), obtaining a more reasonable calculation result through a plurality of trial calculations, wherein p is selectedB12.96bar, then VBWhen the refrigerant charge in the circulation system is 880g in the rated heating operation and 920g in the circulation system in the intermediate heating operation, 211.4ml is obtained.
By connecting two pre-charged adjustment tanks to the air-conditioning pipeline at P1 and P2, respectively, the improved air-conditioning system can automatically adjust the charging amount of the circulating system according to the working conditions, and the data is shown in the third table.
TABLE 3
As mentioned above, in the improved air conditioner, under the refrigeration condition, the refrigerant charge amount in the circulating system is equal to the optimal matching value, so the arrangement of the first adjusting tank plays a role in effectively improving the energy efficiency of the air conditioner under the refrigeration condition; under the heating condition, the refrigerant filling amount in the circulating system is not equal to but close to the optimal matching value, and the arrangement of the second adjusting tank has small effect of improving the energy efficiency of the air-conditioning heating condition.
It should be noted that in this embodiment, the total refrigerant charge amount of the air conditioning system is equal to the optimal matching value of the charge amount under the intermediate refrigeration condition, and if the air conditioner needs to operate at a lower frequency when the cooling capacity is smaller than the intermediate refrigeration condition, it may be considered to set the total refrigerant charge amount of the air conditioning system to a certain value greater than 1000g to ensure that the refrigerant is sufficient when the air conditioner operates at the lower frequency condition. If such a change is made, the calculation process described above changes accordingly.
Related parameter
The design parameters of the first and second conditioning tanks can be changed for different models and specifications of air conditioners. After a lot of experiments, calculations and researches, the inventor obtains the range of relevant design parameters of air conditioners with different specifications aiming at the air conditioning system adopting the embodiment of the invention, as shown in table 4.
TABLE 4
For air conditioners of different models and specifications, the automatic adjustment amount of the refrigerant charge amount is different under various working conditions. In the present invention, the mass percentages of the total amount of refrigerant charge in the circulation system, the first adjustment tank, and the second adjustment tank are shown in table 5.
TABLE 5
The air conditioner capable of automatically adjusting the refrigerant charge amount can enable the refrigerant charge amount in the circulating system to be equal to or close to the optimal matching value of each working condition by storing redundant refrigerant in the adjusting tank under different working conditions, thereby improving the energy efficiency of the air conditioner under each working condition and achieving better refrigerating/heating effects.
It should be noted that for some air conditioning systems, such as a single cold or single hot air conditioning system, the energy efficiency of the air conditioner can be improved to some extent by providing only one conditioning tank. While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the invention can be effected therein by those skilled in the art after reading the above teachings of the invention. Such equivalents are intended to fall within the scope of the claims appended hereto.
Claims (22)
1. An air conditioning system, which comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a circulating pipeline, is characterized in that,
the circulation pipeline is connected with a regulating tank, a partition is arranged in the regulating tank, the partition divides the regulating tank into two parts which are sealed with each other, one part is pre-filled with gas, the other part is used for storing refrigerant, the part for storing the refrigerant is communicated with the circulation pipeline, and the partition can be deformed so as to change the volumes of the two parts; wherein,
when the air conditioning system works under different working conditions, the pressure of the refrigerant flowing through the joint of the circulating pipeline and the adjusting tank in the circulating pipeline is changed, so that the separating piece can be deformed, the amount of the refrigerant stored in the adjusting tank is changed, and the refrigerant filling amount in the circulating pipeline is changed;
the conditioning tank is pre-filled with gas before being connected to the circulation pipe, and the partition is deformed to abut against a portion of a conditioning tank wall so that a portion of the conditioning tank for storing refrigerant has no volume.
2. The air conditioning system of claim 1, wherein the conditioning tank comprises a first conditioning tank connected to a circulation pipe between the outdoor heat exchanger and the throttling device.
3. The air conditioning system as claimed in claim 1, wherein said conditioning tank includes a second conditioning tank connected to a circulation pipe between said indoor heat exchanger and said throttle device.
4. The air conditioning system as claimed in claim 1, wherein the conditioning tank includes a first conditioning tank connected to a circulation pipe between the outdoor heat exchanger and the throttling means; and
the adjusting tank comprises a second adjusting tank which is connected to a circulating pipeline between the indoor heat exchanger and the throttling device.
5. The air conditioning system of claim 1, wherein a total refrigerant charge in the air conditioning system is greater than or equal to a best match refrigerant charge for the air conditioning system at an intermediate refrigeration condition.
6. Air conditioning system according to claim 2 or 4, characterized in that the pre-charge pressure of the gas in the conditioning tank pre-filled with gas meets the following requirements:
the pre-charging pressure in the first adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the heating working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the rated refrigerating working condition.
7. Air conditioning system according to claim 3 or 4, characterized in that the pre-charge pressure of the gas in the conditioning tank pre-filled with gas meets the following requirements:
the pre-charging pressure in the second adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the refrigeration working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the intermediate heating working condition.
8. The air conditioning system as claimed in claim 6, wherein the pre-charge pressure in the first conditioning tank is lower than or equal to the condensing pressure of the air conditioning system in the middle cooling condition.
9. Air conditioning system according to claim 2 or 4,
when the air conditioning system is in a high-frequency refrigeration working condition, the first adjusting tank stores a refrigerant,
when the air conditioning system is in a low-frequency refrigeration working condition, the amount of the refrigerant stored in the first adjusting tank is smaller than that of the refrigerant stored in the first adjusting tank under a high-frequency refrigeration working condition or the refrigerant is not stored; and/or
When the air conditioning system is in a heating working condition, the first adjusting tank does not store the refrigerant.
10. The air conditioning system as claimed in claim 3 or 4, wherein when the air conditioning system is in a cooling condition, the second conditioning tank does not store refrigerant; and/or
When the air conditioning system is in a high-frequency heating working condition, the second adjusting tank stores a refrigerant;
when the air conditioning system is in a low-frequency heating working condition, the amount of the refrigerant stored in the second adjusting tank is smaller than that of the refrigerant stored in the second adjusting tank under the high-frequency heating working condition.
11. The air conditioning system of claim 1, wherein the material used to make the conditioning tank and the partition has one or more characteristics selected from the group consisting of:
compatible with refrigerants and refrigeration oils;
the temperature resistance range is-20 ℃ to 150 ℃;
can bear the pressure of 5 MPa.
12. The air conditioning system as claimed in claim 1, wherein the material used to make the partition is selected from one or more of the following materials: neoprene, nitrile rubber, ethylene propylene diene monomer, hypalon, fluororubber and polytetrafluoroethylene; and/or
The partition is deformed to expand the portion of the conditioning tank for storing the refrigerant to a two-thirds conditioning tank volume; and/or
The material used to make the can body is selected from one or more of the following materials:
cast iron, cast aluminum, carbon steel, stainless steel, copper, and alloys; and/or
The gas is nitrogen or air.
13. The air conditioning system as claimed in claim 1, wherein the partition is a film structure having elasticity.
14. A method of automatically adjusting an actual refrigerant charge of an air conditioning system, the air conditioning system including a compressor, an outdoor heat exchanger, an indoor heat exchanger, a throttling device, and a circulation line, the method comprising: a regulating tank is connected to the circulating pipeline;
a partition is arranged in the adjusting tank and divides the adjusting tank into two parts which are sealed with each other, wherein one part is pre-filled with gas, the other part can be used for storing refrigerant, the part for storing the refrigerant is communicated with the circulating pipeline, and the partition can be deformed so as to change the volumes of the two parts;
when the air conditioning system works under different working conditions, the pressure of the refrigerant flowing through the joint of the circulating pipeline and the adjusting tank in the circulating pipeline is changed, so that the amount of the refrigerant stored in the adjusting tank is changed, and the refrigerant filling amount in the circulating pipeline is changed;
a first adjusting tank is connected to a circulating pipeline between the outdoor heat exchanger and the throttling device;
wherein the conditioning tank is pre-filled with gas prior to being connected to the circulation conduit, the pre-charge pressure of the gas in the pre-filled conditioning tank satisfying the following requirements:
the pre-charging pressure in the first adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the heating working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the rated refrigerating working condition.
15. The method of claim 14, wherein a second conditioning tank is connected to the circulation line between the indoor heat exchanger and the throttling means.
16. The method according to claim 15, characterized in that the conditioning tank is prefilled with gas before being connected to the circulation conduit, the gas in the prefilled conditioning tank also satisfying the following requirements:
the pre-charging pressure in the second adjusting tank is higher than the maximum evaporation pressure of the refrigerant of the air conditioning system under the refrigeration working condition and lower than the condensation pressure of the refrigerant of the air conditioning system under the intermediate heating working condition.
17. The method of claim 14, further comprising determining a pre-charge volume and a pre-charge pressure of the regulated tank:
(1) providing data of pressure and temperature of refrigerant flowing through the connection part of the circulating pipeline and the regulating tank in the circulating pipeline under each working condition of the air conditioning system;
(2) providing optimal refrigerant filling matching values of all working conditions of the air conditioning system;
(3) determining the pre-charging pressure of the regulating tank according to the pressure and temperature data provided in the step (1) and the pre-charging pressure requirement, and calculating the pre-charging volume of the regulating tank through a gas state equation.
18. The method of claim 14, wherein the total refrigerant charge in the air conditioning system is greater than or equal to the refrigerant charge of the air conditioning system at the intermediate refrigeration condition, wherein
The total refrigerant charge of the air conditioning system with the rated refrigerating capacity of 2600W is 700-900 g; and/or
The total refrigerant charge of the air conditioning system with rated refrigerating capacity of 3500W is 1000-1200 g; and/or
The total refrigerant charge of the air conditioning system with the rated refrigerating capacity of 5000W is 1400-1800 g; and/or
The total refrigerant charge of the air conditioning system with rated refrigerating capacity of 7200W is 2000-2400 g; and/or
The total refrigerant charge of the air conditioning system with the rated refrigerating capacity of 12000W is 3600-4000 g.
19. The method according to claim 14, wherein the gas pre-charge pressure of the first conditioning tank is 1.25 to 3.0 MPa.
20. The method according to claim 15, wherein the gas pre-charge pressure of the second conditioning tank is 0.75-2.25 MPa.
21. The method of claim 15,
when the rated refrigerating capacity of the air conditioning system is 2600W, the pre-charging volume of the first adjusting tank is 400-700 ml, and the pre-charging volume of the second adjusting tank is 100-400 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 3500W, the pre-charging volume of the first adjusting tank is 500-900 ml, and the pre-charging volume of the second adjusting tank is 200-500 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 5000W, the pre-charging volume of the first adjusting tank is 800-1200 ml, and the pre-charging volume of the second adjusting tank is 300-600 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 7200W, the pre-charging volume of the first adjusting tank is 1000-1500 ml, and the pre-charging volume of the second adjusting tank is 400-800 ml; and/or
When the rated refrigerating capacity of the air conditioning system is 12000W, the pre-charging volume of the first adjusting tank is 2000-3000 ml, and the pre-charging volume of the second adjusting tank is 500-1200 ml.
22. The method of claim 15,
when the air-conditioning system is in a high-frequency refrigeration working condition, the refrigerant charge in the circulating pipeline, the refrigerant storage capacity in the first adjusting tank and the refrigerant storage capacity in the second adjusting tank account for 90-95%, 5-10% and 0% of the total refrigerant charge of the air-conditioning system in percentage by mass respectively; and/or
When the air-conditioning system is in a low-frequency refrigeration working condition, the refrigerant charge in the circulating pipeline, the refrigerant storage capacity in the first adjusting tank and the refrigerant storage capacity in the second adjusting tank account for 100%, 0% and 0% of the total refrigerant charge of the air-conditioning system respectively in percentage by mass; and/or
When the air conditioning system is in a high-frequency heating working condition, the refrigerant filling amount in the circulating pipeline, the refrigerant storage amount in the first adjusting tank and the refrigerant storage amount in the second adjusting tank account for 80-85%, 0% and 15-20% of the total refrigerant filling amount of the air conditioning system respectively in percentage by mass; and/or
When the air conditioning system is in a low-frequency heating working condition, the refrigerant charging amount in the circulating pipeline, the refrigerant storage amount in the first adjusting tank and the refrigerant storage amount in the second adjusting tank account for 85-90%, 0% and 10-15% of the total refrigerant charging amount of the air conditioning system in percentage by mass respectively.
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| CN106524606A (en) * | 2016-10-12 | 2017-03-22 | 重庆美的通用制冷设备有限公司 | Adjustment device, system and method for refrigerant circulation quantity of air conditioner |
| CN108344217A (en) * | 2018-04-09 | 2018-07-31 | 奥克斯空调股份有限公司 | A kind of refrigerant liquid amount adjusting apparatus, air conditioner test adjustment system and air-conditioning refrigerant method of adjustment |
| CN111981732B (en) * | 2020-07-24 | 2021-07-27 | 中标能效科技（北京）有限公司 | Automatic refrigerant filling device and method |
| CN114659233A (en) * | 2022-03-28 | 2022-06-24 | 青岛海尔空调器有限总公司 | Air conditioner and control method for air conditioner |
| CN115200270A (en) * | 2022-06-28 | 2022-10-18 | 广东美的制冷设备有限公司 | Air conditioner, control method of air conditioner, gas-liquid separator, and operation control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201293503Y (en) * | 2008-09-27 | 2009-08-19 | 广东美的电器股份有限公司 | Coolant amount adjusting device for air conditioner |
| DE102008002603A1 (en) * | 2008-06-24 | 2009-12-31 | Robert Bosch Gmbh | Air-conditioning service device for motor vehicle, has oil line attached to oil chamber, and gas line attached to gas bell, where pressure in gas bell is controlled by connection of gas line with pressure-generating unit |
| DE102009031293A1 (en) * | 2008-07-02 | 2010-01-07 | Tkr Spezialwerkzeuge Gmbh | Fluid e.g. oil, system e.g. motor vehicle-air conditioning system, filling device for use in workshop, has pressure container provided with volume-changeable cavities for receiving fluids, respectively |
| CN201628430U (en) * | 2010-01-25 | 2010-11-10 | 大连三洋压缩机有限公司 | Automatic recovering and charging device of refrigerating system |
| CN203163327U (en) * | 2013-02-05 | 2013-08-28 | 东莞市微电环保科技有限公司 | Air conditioning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10015976B4 (en) * | 2000-03-30 | 2019-07-04 | Mahle International Gmbh | Filling device for motor vehicle air conditioners |
-
2014
- 2014-11-18 CN CN201410659795.7A patent/CN105674641B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008002603A1 (en) * | 2008-06-24 | 2009-12-31 | Robert Bosch Gmbh | Air-conditioning service device for motor vehicle, has oil line attached to oil chamber, and gas line attached to gas bell, where pressure in gas bell is controlled by connection of gas line with pressure-generating unit |
| DE102009031293A1 (en) * | 2008-07-02 | 2010-01-07 | Tkr Spezialwerkzeuge Gmbh | Fluid e.g. oil, system e.g. motor vehicle-air conditioning system, filling device for use in workshop, has pressure container provided with volume-changeable cavities for receiving fluids, respectively |
| CN201293503Y (en) * | 2008-09-27 | 2009-08-19 | 广东美的电器股份有限公司 | Coolant amount adjusting device for air conditioner |
| CN201628430U (en) * | 2010-01-25 | 2010-11-10 | 大连三洋压缩机有限公司 | Automatic recovering and charging device of refrigerating system |
| CN203163327U (en) * | 2013-02-05 | 2013-08-28 | 东莞市微电环保科技有限公司 | Air conditioning system |
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Address after: 201206 Shanghai Pudong New Area China (Shanghai) free trade test area, Yun Qiao Road No. 1051 Applicant after: Shanghai Haili Electrical Appliance Co. Ltd. Address before: 201206 Jinqiao Road, Pudong New Area Jinqiao Export Processing Zone, Shanghai, 1051 Applicant before: Rili Electric Appliance Co., Ltd., Shanghai |
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