CN108716784A - Multi-line system and its control method - Google Patents
Multi-line system and its control method Download PDFInfo
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- CN108716784A CN108716784A CN201810579677.3A CN201810579677A CN108716784A CN 108716784 A CN108716784 A CN 108716784A CN 201810579677 A CN201810579677 A CN 201810579677A CN 108716784 A CN108716784 A CN 108716784A
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- temperature
- gas
- line system
- heat exchanger
- aperture
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
Abstract
The invention discloses a kind of multi-line system and its control method, the multi-line system, including outdoor unit, multiple indoor units and adjusting device for amount of coolant, wherein outdoor unit includes compressor, four-way valve, outdoor heat exchanger and outdoor throttle valve；Adjusting device for amount of coolant includes Intermediate Heat Exchanger, adjustable throttling, solenoid valve and gas-liquid separator, adjusting device for amount of coolant is used for when the coolant quantity of multi-line system is excessive or very few, it is opened by controlling solenoid valve, the aperture for adjusting adjustable throttling simultaneously, so that coolant quantity reaches suitable state.Multi-line system according to the ... of the embodiment of the present invention can not only improve the efficiency of system operation, but also can avoid the liquid hammer problem for causing to generate because compressor returns liquid, improve the reliability of system operation.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of multi-line system and a kind of controlling party of multi-line system
Method.
Background technology
In general, multi-line system is by an outdoor unit equipped with more indoor units, therefore, in different operating modes, different negative
Under lotus, the coolant quantity that running needs is variation, and multi-line system is during the installation process, coolant injection amount be by
Design value determines at full capacity, still, can not change practical refrigerant circulation according to the size of actual load in system operation
Amount so that the coolant quantity of system is excessive or very few, not only reduces the efficiency of system operation in this way, it is also possible to cause to compress
Machine returns liquid and generates liquid hammer, reduces the reliability of system operation.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of multi-line system, which can be in multi-line system
When coolant quantity is excessive or very few, opened by controlling solenoid valve, while adjusting the aperture of adjustable throttling, so that coolant quantity reaches
To suitable state, to which the efficiency of system operation can not only be improved, and can avoid causing to produce because compressor returns liquid
Raw liquid hammer problem, improves the reliability of system operation.
It is another object of the present invention to propose a kind of control method of multi-line system.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of multi-line system, including outdoor unit, multiple
Indoor unit and adjusting device for amount of coolant, wherein the outdoor unit includes compressor, four-way valve, outdoor heat exchanger and outdoor throttling
Valve, the first port of the compressor are connected with the first interface of the four-way valve, the second interface of the four-way valve with it is described
The first end of outdoor heat exchanger is connected, and the second end of the outdoor heat exchanger is connected with the first end of the outdoor throttle valve, institute
The 4th interface for stating four-way valve is connected with gas side shut-off valve；The adjusting device for amount of coolant includes Intermediate Heat Exchanger, adjustable throttling
Valve, solenoid valve and gas-liquid separator, first end and the outdoor throttle valve of the first heat exchange flow path of the Intermediate Heat Exchanger
Second end be connected, the Intermediate Heat Exchanger first heat exchange flow path second end respectively with liquid side shut-off valve and the adjustable throttling
The first end of valve is connected, the first end of the second heat exchange flow path of the Intermediate Heat Exchanger second port with the compressor respectively
It is connected with the first end of the solenoid valve, the second end of the second heat exchange flow path of the Intermediate Heat Exchanger and the adjustable throttling
Second end be connected, the second end of the solenoid valve respectively with the third interface of the four-way valve and the gas-liquid separator the
One end is connected, and the second end of the gas-liquid separator is connected with the third port of the compressor；The adjusting device for amount of coolant
When excessive or very few for the coolant quantity in the multi-line system, opened by controlling the solenoid valve, while adjusting institute
The aperture of adjustable throttling is stated, so that coolant quantity reaches suitable state.
The multi-line system proposed according to embodiments of the present invention includes Intermediate Heat Exchanger, adjustable throttling, electricity by increasing
The adjusting device for amount of coolant of magnet valve and gas-liquid separator passes through in this way when the coolant quantity of multi-line system is excessive or very few
It controls solenoid valve to open, while adjusting the aperture of adjustable throttling, so that coolant quantity reaches suitable state, thus can not only
The efficiency of system operation is improved, and the liquid hammer problem for causing to generate because compressor returns liquid can be avoided, improves system operation
Reliability.
In addition, the multi-line system proposed according to the above embodiment of the present invention can also have following additional technical characteristic：
According to one embodiment of present invention, when the multi-line system with freeze or heating mode run when, wherein when
It when coolant quantity is excessive, controls the solenoid valve and opens, while tuning up the aperture of the adjustable throttling, to pass through the gas-liquid point
Refrigerant is stored from device；When coolant quantity is very few, controls the solenoid valve and opens, while turning the aperture of the adjustable throttling down,
So that the refrigerant correspondence in the gas-liquid separator is added in refrigeration or heating cycle.
According to one embodiment of present invention, the aperture for tuning up the adjustable throttling, including：Obtain the gas-liquid
The temperature of the first end of second heat exchange flow path of the temperature of the second end of separator and the Intermediate Heat Exchanger；According to the institute of acquisition
The temperature for stating the temperature of the second end of gas-liquid separator and the first end of the second heat exchange flow path of the Intermediate Heat Exchanger, to described
The aperture of adjustable throttling carries out tuning up control；The aperture for turning the adjustable throttling down, including：Obtain the gas-liquid point
The temperature of the first end of second heat exchange flow path of temperature and the Intermediate Heat Exchanger from the second end of device；According to acquisition
The temperature of the first end of second heat exchange flow path of the temperature of the second end of gas-liquid separator and the Intermediate Heat Exchanger, to it is described can
The aperture of flow regulating valve carries out turning control down.
According to one embodiment of present invention, when the pressure at expulsion of the compressor be more than the first default pressure at expulsion, and
When delivery temperature is less than the first default delivery temperature, judge that coolant quantity is excessive.
According to one embodiment of present invention, when the pressure at expulsion of the compressor be less than the second default pressure at expulsion, and
When delivery temperature is more than the second default delivery temperature, judge that coolant quantity is very few, wherein the second default pressure at expulsion is less than institute
The first default pressure at expulsion is stated, the second default delivery temperature is more than the described first default delivery temperature.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of control method of multi-line system, packet
Include following steps：The coolant quantity of the multi-line system is judged；If the coolant quantity of the multi-line system it is excessive or
Person is very few, then controls the solenoid valve and open, while adjusting the aperture of the adjustable throttling, so that coolant quantity reaches suitable
State.
The control method for proposing multi-line system according to embodiments of the present invention, first sentences the coolant quantity of multi-line system
It is disconnected, and when the coolant quantity of multi-line system is excessive or very few, control solenoid valve is opened, while adjusting opening for adjustable throttling
Degree so that coolant quantity reaches suitable state, to which the efficiency of system operation can not only be improved, and can avoid causing because
Compressor returns liquid and the liquid hammer problem that generates, improves the reliability of system operation.
In addition, the control method of the multi-line system proposed according to the above embodiment of the present invention can also have following add
Technical characteristic：
According to one embodiment of present invention, when the multi-line system with freeze or heating mode run when, wherein when
It when coolant quantity is excessive, controls the solenoid valve and opens, while tuning up the aperture of the adjustable throttling, to pass through the gas-liquid point
Refrigerant is stored from device；When coolant quantity is very few, controls the solenoid valve and opens, while turning the aperture of the adjustable throttling down,
So that the refrigerant correspondence in the gas-liquid separator is added in refrigeration or heating cycle.
According to one embodiment of present invention, the aperture for tuning up the adjustable throttling, including：Obtain the gas-liquid
The temperature of the first end of second heat exchange flow path of the temperature of the second end of separator and the Intermediate Heat Exchanger；According to the institute of acquisition
The temperature for stating the temperature of the second end of gas-liquid separator and the first end of the second heat exchange flow path of the Intermediate Heat Exchanger, to described
The aperture of adjustable throttling carries out tuning up control；The aperture for turning the adjustable throttling down, including：Obtain the gas-liquid point
The temperature of the first end of second heat exchange flow path of temperature and the Intermediate Heat Exchanger from the second end of device；According to acquisition
The temperature of the first end of second heat exchange flow path of the temperature of the second end of gas-liquid separator and the Intermediate Heat Exchanger, to it is described can
The aperture of flow regulating valve carries out turning control down.
According to one embodiment of present invention, the control method of above-mentioned multi-line system further includes：As the row of compressor
Atmospheric pressure be more than the first default pressure at expulsion, and delivery temperature be less than the first default delivery temperature when, judge that coolant quantity is excessive.
According to one embodiment of present invention, the control method of above-mentioned multi-line system further includes：When the compressor
Pressure at expulsion be less than the second default pressure at expulsion, and delivery temperature be more than the second default delivery temperature when, judge coolant quantity mistake
It is few, wherein the second default pressure at expulsion is less than the described first default pressure at expulsion, and the second default delivery temperature is more than
The first default delivery temperature.
Description of the drawings
Fig. 1 is the structural schematic diagram of multi-line system according to the ... of the embodiment of the present invention；
Fig. 2 is cold when multi-line system according to an embodiment of the invention is run in a chiller mode and coolant quantity is suitable
Matchmaker's flow graph；
Fig. 3 is that multi-line system according to an embodiment of the invention is run in a chiller mode and coolant quantity is excessive or very few
When refrigerant flow graph；
Fig. 4 is cold when multi-line system according to an embodiment of the invention is run with heating mode and coolant quantity is suitable
Matchmaker's flow graph；
Fig. 5 is that multi-line system according to an embodiment of the invention is run with heating mode and coolant quantity is excessive or very few
When refrigerant flow graph；And
Fig. 6 is the flow chart of the control method of multi-line system according to the ... of the embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The control of the multi-line system proposed according to embodiments of the present invention and multi-line system described below in conjunction with the accompanying drawings
Method.
Fig. 1 is the structural schematic diagram of multi-line system according to the ... of the embodiment of the present invention.As shown in Figure 1, the multi-line system
It may include：Outdoor unit 10, multiple indoor units 20 and adjusting device for amount of coolant 30.
Wherein, multiple indoor units 20 may include the first indoor heat exchanger 21, second the 22, first indoor throttling of indoor heat exchanger
Throttle valve 24 in valve 23 and second Room, outdoor unit 10 may include compressor 11, four-way valve 12, outdoor heat exchanger 13 and outdoor throttling
Valve 14, the first port of compressor 11 are connected with the first interface a of four-way valve 12, and second interface b and the outdoor of four-way valve 12 are changed
The first end of hot device 13 is connected, and the second end of outdoor heat exchanger 13 is connected with the first end of outdoor throttle valve 14, four-way valve 12
4th interface d is connected with the first end of gas side shut-off valve 40.The second end of gas side shut-off valve 40 respectively with the first indoor heat exchanger
21 first end is connected with the first end of the second indoor heat exchanger 22, is changed in the second end and second Room of the first indoor heat exchanger 21
The second end of hot device 22 passes through throttle valve 24 and liquid side shut-off valve 50 in the corresponding first indoor throttle valve 23 and second Room respectively
Second end be connected.
Adjusting device for amount of coolant 30 may include Intermediate Heat Exchanger 31, adjustable throttling 32, solenoid valve 33 and gas-liquid separator
34, the first end of the first heat exchange flow path of Intermediate Heat Exchanger 31 is connected with the second end of outdoor throttle valve 14, Intermediate Heat Exchanger 31
First heat exchange flow path second end be connected respectively with the first end of the first end of liquid side shut-off valve 50 and adjustable throttling 32, in
Between heat exchanger 31 the second heat exchange flow path the first end first end phase with the second port of compressor 11 and solenoid valve 33 respectively
Even, the second end of the second heat exchange flow path of Intermediate Heat Exchanger 31 is connected with the second end of adjustable throttling 32, and the of solenoid valve 33
Two ends are connected with the first end of the third interface c of four-way valve 12 and gas-liquid separator 34 respectively, the second end of gas-liquid separator 34
It is connected with the third port of compressor 11.
Adjusting device for amount of coolant 30 is used for when the coolant quantity of multi-line system is excessive or very few, by controlling solenoid valve
33 open, while adjusting the aperture of adjustable throttling 32, so that coolant quantity reaches suitable state.
That is, when the coolant quantity of multi-line system is excessive or very few, need to adjust the coolant quantity of system
Section controls solenoid valve 33 and is in open state, while control is adjusted to the aperture of adjustable throttling 32 at this time, cold to realize
The storage and release of matchmaker can adjust refrigerant actual cycle amount in this way, and refrigerant actual cycle amount is made to reach suitable state, to
The efficiency of system operation can not only be improved, and the liquid hammer problem for causing to generate because compressor returns liquid can be avoided, is improved
The reliability of system operation.
According to one embodiment of present invention, when multi-line system with freeze or heating mode run when, wherein work as refrigerant
When measuring excessive, control solenoid valve 33 is opened, while tuning up the aperture of adjustable throttling 32, cold to be stored by gas-liquid separator 34
Matchmaker；When coolant quantity is very few, control solenoid valve 33 is opened, while turning the aperture of adjustable throttling 32 down, so that gas-liquid separator
Refrigerant correspondence in 34 is added in refrigeration or heating cycle.
Wherein, in a specific embodiment of the invention, the aperture for tuning up adjustable throttling 32 may include：Obtain gas-liquid point
The temperature of the temperature of second end from device 34 and the first end of the second heat exchange flow path of Intermediate Heat Exchanger 31；According to the gas-liquid of acquisition
The temperature of the temperature of the second end of separator 34 and the first end of the second heat exchange flow path of Intermediate Heat Exchanger 31, to adjustable throttling
32 aperture carries out tuning up control.The aperture for turning adjustable throttling 32 down may include：Obtain the second end of gas-liquid separator 34
The temperature of the first end of second heat exchange flow path of temperature and Intermediate Heat Exchanger 31；According to the second end of the gas-liquid separator 34 of acquisition
Temperature and Intermediate Heat Exchanger 31 second heat exchange flow path first end temperature, the aperture of adjustable throttling 32 is turned down
Control.
Specifically, when multi-line system is run in a chiller mode, it is possible that following situations：
The first：Coolant quantity is suitable, controls solenoid valve 33 at this time and closes, and the cycle of refrigerant is as shown the direction of arrow in Figure 2,
Refrigerant circulation is not adjusted.
Second：Coolant quantity is excessive, controls solenoid valve 33 at this time and opens, while tuning up the aperture of adjustable throttling 32, with
Make to store refrigerant by gas-liquid separator 34, refrigerant recycles shown in arrow direction as shown in Figure 3.Specifically, work as coolant quantity
When excessive, control solenoid valve 33 is opened, while by the way that the acquisition of temperature sensor 35 in the second end of gas-liquid separator 34 is arranged
Temperature T35 at this and the temperature sensor 36 being arranged in the first end of the second heat exchange flow path of Intermediate Heat Exchanger 31 are adopted at this
Temperature T36, if T35 > T36, it is cold that the liquid refrigerants in gas-liquid two-phase refrigerant in gas-liquid separator 34 can be evaporated to gaseous state
Matchmaker participates in refrigeration cycle, carries out the aperture of adjustable throttling 32 to tune up control at this time, until T35≤T36, while ensureing T35
With the degree of superheat, so that the liquid coolant part after the supercooling of Intermediate Heat Exchanger 31 passes through adjustable throttling 32 and solenoid valve
After 33, gas-liquid separator 34 is returned to, a part of refrigerant, which is become liquid refrigerants, to be stored.
The third：Coolant quantity is very few, controls solenoid valve 33 at this time and opens, while turning the aperture of adjustable throttling 32 down, with
The refrigerant in gas-liquid separator 34 is set to be added in refrigeration cycle, refrigerant recycles shown in arrow direction as shown in Figure 3.Specifically
Ground, when coolant quantity is very few, control solenoid valve 33 is opened, while by the way that the temperature biography in the second end of gas-liquid separator 34 is arranged
Sensor 35 obtains the temperature T35 at this and the temperature sensor in the first end of the second heat exchange flow path of Intermediate Heat Exchanger 31 is arranged
36 obtain the temperature T36 at this, if T35≤T36, the gaseous coolant meeting in gas-liquid two-phase refrigerant in gas-liquid separator 34
It is condensed into liquid refrigerants storage wherein, carries out the aperture of adjustable throttling 32 to turn control down at this time, until T35 > T36, so that
The liquid refrigerants in gas-liquid two-phase refrigerant in gas-liquid separator 34 is evaporated to gaseous coolant and participates in refrigeration cycle.
When multi-line system is run with heating mode, it is equally possible to will appear following situations：
The first：Coolant quantity is suitable, controls solenoid valve 33 at this time and closes, and the cycle of refrigerant is as shown the direction of arrow in Figure 4,
Refrigerant circulation is not adjusted.
Second：Coolant quantity is excessive, controls solenoid valve 33 at this time and opens, while tuning up the aperture of adjustable throttling 32, with
Make to store refrigerant by gas-liquid separator 34, refrigerant recycles shown in arrow direction as shown in Figure 5.Specifically, work as coolant quantity
When excessive, control solenoid valve 33 is opened, while by the way that the acquisition of temperature sensor 35 in the second end of gas-liquid separator 34 is arranged
Temperature T35 at this and the temperature sensor 36 being arranged in the first end of the second heat exchange flow path of Intermediate Heat Exchanger 31 obtain at this
Temperature T36, if T35 > T36, the liquid refrigerants in gas-liquid two-phase refrigerant in gas-liquid separator 34 can be evaporated to gaseous state
Refrigerant participates in heating cycle, carries out the aperture of adjustable throttling 32 to tune up control at this time, until T35≤T36, ensures simultaneously
T35 has the degree of superheat, so that the liquid refrigerants one after the first indoor heat exchanger 21 and the heat exchange of the second indoor heat exchanger 22
After lease making adjustable throttling 32 and solenoid valve 33, gas-liquid separator 34 is returned to, a part of refrigerant, which is become liquid refrigerants, to be stored
Come.
The third：Coolant quantity is very few, controls solenoid valve 33 at this time and opens, while turning the aperture of adjustable throttling 32 down, with
The refrigerant in gas-liquid separator 34 is set to be added in heating cycle, refrigerant recycles shown in arrow direction as shown in Figure 5.Specifically
Ground, when coolant quantity is very few, control solenoid valve 33 is opened, while by the way that the temperature biography in the second end of gas-liquid separator 34 is arranged
Sensor 35 obtains the temperature T35 at this and the temperature sensor in the first end of the second heat exchange flow path of Intermediate Heat Exchanger 31 is arranged
36 obtain the temperature T36 at this, if T35≤T36, the gaseous coolant meeting in gas-liquid two-phase refrigerant in gas-liquid separator 34
It is condensed into liquid refrigerants storage wherein, carries out the aperture of adjustable throttling 32 to turn control down at this time, until T35 > T36, so that
The liquid refrigerants in gas-liquid two-phase refrigerant in gas-liquid separator 34 is evaporated to gaseous coolant and participates in heating cycle.
According to one embodiment of present invention, when the pressure at expulsion of compressor is more than the first default pressure at expulsion, and exhaust
When temperature is less than the first default delivery temperature, judge that coolant quantity is excessive.Wherein, the first default pressure at expulsion and the first default exhaust
Temperature can be configured according to actual conditions.
According to one embodiment of present invention, when the pressure at expulsion of compressor is less than the second default pressure at expulsion, and exhaust
When temperature is more than the second default delivery temperature, judge that coolant quantity is very few.Wherein, the second default pressure at expulsion and the second default exhaust
Temperature can be configured according to actual conditions.
Specifically, in multi-line system with freeze or heating mode run during, by the way that 11 in compressor are arranged
The pressure sensor 16 of first port obtain the pressure at expulsion P16 at this in real time, and by the way that first in compressor 11 is arranged
The temperature sensor 15 of port obtains the delivery temperature T15 at this in real time.Then, according to the default pressure at expulsion P1 of P16 and first
And the default exhaust of the second magnitude relationship and the default delivery temperature T1 and second of T15 and first between default pressure at expulsion P2
Magnitude relationship between temperature T2 judges coolant quantity.If P16 > P1 and T15 < T1, judge that coolant quantity is excessive；Such as
Fruit P16 < P2 and T15 > T2, then judge that coolant quantity is very few；If P2≤P16≤P1 and T1≤T15≤T2, judge coolant quantity
Properly.
When the coolant quantity of multi-line system is excessive or very few, when needing that coolant quantity is adjusted, passes through and switch electromagnetism
Valve 33, while adjusting the aperture of adjustable throttling 32 can adjust that refrigerant is practical to follow in this way to realize the storage and release of refrigerant
Circular rector makes refrigerant actual cycle amount reach suitable state, to improve the efficiency of system operation, and can keep away
Exempt from the liquid hammer problem for causing to generate because compressor returns liquid, improves the reliability of system operation.
It should be noted that in other embodiments of the invention, the payload that can be also run according to multi-line system
To judge that coolant quantity is excessive or very few, wherein when the load of multi-line system operation is reduced, judge that coolant quantity is excessive；When
When the load of multi-line system increases, judge that coolant quantity is very few；When the load of multi-line system operation does not change, refrigerant is judged
Amount is suitable.
In conclusion the multi-line system proposed according to embodiments of the present invention, by the way that increase include Intermediate Heat Exchanger, adjustable
The adjusting device for amount of coolant of throttle valve, solenoid valve and gas-liquid separator, in this way the coolant quantity of multi-line system is excessive or mistake
When few, opened by controlling solenoid valve, while adjusting the aperture of adjustable throttling, so that coolant quantity reaches suitable state, from
And the efficiency of system operation can not only be improved, and the liquid hammer problem for causing to generate because compressor returns liquid can be avoided, it carries
The reliability of high system operation.
Fig. 6 is the flow chart of the control method of multi-line system according to the ... of the embodiment of the present invention.As shown in fig. 6, this is multi-joint
The control method of machine system may include following steps：
S1 judges the coolant quantity of multi-line system.
S2 controls solenoid valve unlatching if the coolant quantity of multi-line system is excessive or very few, while adjusting adjustable
The aperture for flowing valve, so that coolant quantity reaches suitable state.
According to one embodiment of present invention, when the multi-line system with freeze or heating mode run when, wherein when
It when coolant quantity is excessive, controls the solenoid valve and opens, while tuning up the aperture of the adjustable throttling, to pass through the gas-liquid point
Refrigerant is stored from device；When coolant quantity is very few, controls the solenoid valve and opens, while turning the aperture of the adjustable throttling down,
So that the refrigerant correspondence in the gas-liquid separator is added in refrigeration or heating cycle.
According to one embodiment of present invention, the aperture for tuning up the adjustable throttling, including：Obtain the gas-liquid
The temperature of the first end of second heat exchange flow path of the temperature of the second end of separator and the Intermediate Heat Exchanger；According to the institute of acquisition
The temperature for stating the temperature of the second end of gas-liquid separator and the first end of the second heat exchange flow path of the Intermediate Heat Exchanger, to described
The aperture of adjustable throttling carries out tuning up control；The aperture for turning the adjustable throttling down, including：Obtain the gas-liquid point
The temperature of the first end of second heat exchange flow path of temperature and the Intermediate Heat Exchanger from the second end of device；According to acquisition
The temperature of the first end of second heat exchange flow path of the temperature of the second end of gas-liquid separator and the Intermediate Heat Exchanger, to it is described can
The aperture of flow regulating valve carries out turning control down.
According to one embodiment of present invention, the control method of above-mentioned multi-line system further includes：As the row of compressor
Atmospheric pressure be more than the first default pressure at expulsion, and delivery temperature be less than the first default delivery temperature when, judge that coolant quantity is excessive.
According to one embodiment of present invention, the control method of above-mentioned multi-line system further includes：When the compressor
Pressure at expulsion be less than the second default pressure at expulsion, and delivery temperature be more than the second default delivery temperature when, judge coolant quantity mistake
It is few, wherein the second default pressure at expulsion is less than the described first default pressure at expulsion, and the second default delivery temperature is more than
The first default delivery temperature.
It should be noted that undisclosed details in the control method of the multi-line system of the embodiment of the present invention, please refers to
Details disclosed in the multi-line system of the embodiment of the present invention, specific I will not elaborate.
The control method for proposing multi-line system according to embodiments of the present invention, first sentences the coolant quantity of multi-line system
It is disconnected, and when the coolant quantity of multi-line system is excessive or very few, control solenoid valve is opened, while adjusting opening for adjustable throttling
Degree so that coolant quantity reaches suitable state, to which the efficiency of system operation can not only be improved, and can avoid causing because
Compressor returns liquid and the liquid hammer problem that generates, improves the reliability of system operation.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of multi-line system, which is characterized in that including outdoor unit, multiple indoor units and adjusting device for amount of coolant, wherein
The outdoor unit includes compressor, four-way valve, outdoor heat exchanger and outdoor throttle valve, the first port of the compressor with
The first interface of the four-way valve is connected, and the second interface of the four-way valve is connected with the first end of the outdoor heat exchanger, institute
The second end for stating outdoor heat exchanger is connected with the first end of the outdoor throttle valve, and the 4th interface and the gas side of the four-way valve are cut
Only valve is connected；
The adjusting device for amount of coolant includes Intermediate Heat Exchanger, adjustable throttling, solenoid valve and gas-liquid separator, and the centre is changed
The first end of first heat exchange flow path of hot device is connected with the second end of the outdoor throttle valve, and the first of the Intermediate Heat Exchanger changes
The second end of hot flowpath is connected with the first end of liquid side shut-off valve and the adjustable throttling respectively, and the of the Intermediate Heat Exchanger
The first end of two heat exchange flow paths is connected with the first end of the second port of the compressor and the solenoid valve respectively, the centre
The second end of second heat exchange flow path of heat exchanger is connected with the second end of the adjustable throttling, the second end point of the solenoid valve
Be not connected with the first end of the third interface of the four-way valve and the gas-liquid separator, the second end of the gas-liquid separator with
The third port of the compressor is connected；
The adjusting device for amount of coolant is used for when the coolant quantity of the multi-line system is excessive or very few, described in control
Solenoid valve is opened, while adjusting the aperture of the adjustable throttling, so that coolant quantity reaches suitable state.
2. multi-line system as described in claim 1, which is characterized in that when the multi-line system to freeze or heating mode
When operation, wherein
When coolant quantity is excessive, controls the solenoid valve and open, while tuning up the aperture of the adjustable throttling, it is described to pass through
Gas-liquid separator stores refrigerant；
When coolant quantity is very few, controls the solenoid valve and open, while turning the aperture of the adjustable throttling down, so that the gas
Refrigerant correspondence in liquid/gas separator is added in refrigeration or heating cycle.
3. multi-line system as claimed in claim 2, which is characterized in that the aperture for tuning up the adjustable throttling, packet
It includes：
Obtain the first end of the temperature of the second end of the gas-liquid separator and the second heat exchange flow path of the Intermediate Heat Exchanger
Temperature；
According to the of the second of the temperature of the second end of the gas-liquid separator of acquisition and the Intermediate Heat Exchanger the heat exchange flow path
The temperature of one end carries out tuning up control to the aperture of the adjustable throttling；
The aperture for turning the adjustable throttling down, including：
Obtain the first end of the temperature of the second end of the gas-liquid separator and the second heat exchange flow path of the Intermediate Heat Exchanger
Temperature；
According to the of the second of the temperature of the second end of the gas-liquid separator of acquisition and the Intermediate Heat Exchanger the heat exchange flow path
The temperature of one end carries out turning control down to the aperture of the adjustable throttling.
4. multi-line system as described in claim 1, which is characterized in that further include：
When the compressor pressure at expulsion be more than the first default pressure at expulsion, and delivery temperature be less than the first default delivery temperature
When, judge that coolant quantity is excessive.
5. multi-line system as described in claim 1, which is characterized in that further include：
When the compressor pressure at expulsion be less than the second default pressure at expulsion, and delivery temperature be more than the second default delivery temperature
When, judge that coolant quantity is very few, wherein the second default pressure at expulsion be less than the described first default pressure at expulsion, described second
Default delivery temperature is more than the described first default delivery temperature.
6. a kind of control method of multi-line system as described in any one of claim 1-5, which is characterized in that including following
Step：
The coolant quantity of the multi-line system is judged；
If the coolant quantity of the multi-line system is excessive or very few, controls the solenoid valve and open, while described in adjusting
The aperture of adjustable throttling, so that coolant quantity reaches suitable state.
7. the control method of multi-line system as claimed in claim 6, which is characterized in that when the multi-line system is to freeze
Or when heating mode operation, wherein
When coolant quantity is excessive, controls the solenoid valve and open, while tuning up the aperture of the adjustable throttling, it is described to pass through
Gas-liquid separator stores refrigerant；
When coolant quantity is very few, controls the solenoid valve and open, while turning the aperture of the adjustable throttling down, so that the gas
Refrigerant correspondence in liquid/gas separator is added in refrigeration or heating cycle.
8. the control method of multi-line system as claimed in claim 7, which is characterized in that described to tune up the adjustable throttling
Aperture, including：
Obtain the first end of the temperature of the second end of the gas-liquid separator and the second heat exchange flow path of the Intermediate Heat Exchanger
Temperature；
According to the of the second of the temperature of the second end of the gas-liquid separator of acquisition and the Intermediate Heat Exchanger the heat exchange flow path
The temperature of one end carries out tuning up control to the aperture of the adjustable throttling；
The aperture for turning the adjustable throttling down, including：
Obtain the first end of the temperature of the second end of the gas-liquid separator and the second heat exchange flow path of the Intermediate Heat Exchanger
Temperature；
According to the of the second of the temperature of the second end of the gas-liquid separator of acquisition and the Intermediate Heat Exchanger the heat exchange flow path
The temperature of one end carries out turning control down to the aperture of the adjustable throttling.
9. the control method of multi-line system as claimed in claim 6, which is characterized in that further include：
When the pressure at expulsion of compressor is more than the first default pressure at expulsion, and delivery temperature is less than the first default delivery temperature,
Judge that coolant quantity is excessive.
10. the control method of multi-line system as claimed in claim 6, which is characterized in that further include：
When the compressor pressure at expulsion be less than the second default pressure at expulsion, and delivery temperature be more than the second default delivery temperature
When, judge that coolant quantity is very few, wherein the second default pressure at expulsion be less than the described first default pressure at expulsion, described second
Default delivery temperature is more than the described first default delivery temperature.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915988A (en) * | 2019-02-19 | 2019-06-21 | 广东美的暖通设备有限公司 | The control method and device of multi-line system liquid impact prevention |
| CN109931677A (en) * | 2019-02-19 | 2019-06-25 | 广东美的暖通设备有限公司 | Interior machine crosses the control method and device of low temperature valve |
| CN110360709A (en) * | 2019-06-14 | 2019-10-22 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its control method |
| CN111854215A (en) * | 2019-04-24 | 2020-10-30 | 杭州三花研究院有限公司 | Heat pump system |
| CN111895604A (en) * | 2020-07-24 | 2020-11-06 | 海信（山东）空调有限公司 | Air conditioner |
| CN114857665A (en) * | 2022-05-30 | 2022-08-05 | 青岛海信日立空调系统有限公司 | Multi-split system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3399198B2 (en) * | 1995-12-05 | 2003-04-21 | 松下電器産業株式会社 | Refrigeration cycle device |
| 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 |
| CN203454502U (en) * | 2013-07-30 | 2014-02-26 | 广东美的暖通设备有限公司 | Intelligent defrosting air-conditioning system |
| CN104807229A (en) * | 2015-04-27 | 2015-07-29 | 广东美的暖通设备有限公司 | Multi-split air conditioner and control method thereof |
| CN104896813A (en) * | 2015-06-29 | 2015-09-09 | 广东美的暖通设备有限公司 | Air conditioner online system |
| CN104949411A (en) * | 2015-06-09 | 2015-09-30 | 广东美的暖通设备有限公司 | Device and method for detecting quantity of refrigerants and air-conditioner with device for detecting quantity of refrigerants |
| CN106288485A (en) * | 2016-08-16 | 2017-01-04 | 广东美的暖通设备有限公司 | The adjustable air conditioning system of coolant quantity |
| CN106369864A (en) * | 2016-10-28 | 2017-02-01 | 广东美的制冷设备有限公司 | Circulation system and circulation method for air conditioner, and air conditioner |
| CN106765617A (en) * | 2017-02-21 | 2017-05-31 | 广东美的暖通设备有限公司 | Air injection enthalpy-increasing heat pump type air conditioning system, control method, control device and air-conditioner |
| CN206973925U (en) * | 2017-06-29 | 2018-02-06 | 广东美的暖通设备有限公司 | Multiple on-line system |
-
2018
- 2018-06-07 CN CN201810579677.3A patent/CN108716784B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3399198B2 (en) * | 1995-12-05 | 2003-04-21 | 松下電器産業株式会社 | Refrigeration cycle device |
| 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 |
| CN203454502U (en) * | 2013-07-30 | 2014-02-26 | 广东美的暖通设备有限公司 | Intelligent defrosting air-conditioning system |
| CN104807229A (en) * | 2015-04-27 | 2015-07-29 | 广东美的暖通设备有限公司 | Multi-split air conditioner and control method thereof |
| CN104949411A (en) * | 2015-06-09 | 2015-09-30 | 广东美的暖通设备有限公司 | Device and method for detecting quantity of refrigerants and air-conditioner with device for detecting quantity of refrigerants |
| CN104896813A (en) * | 2015-06-29 | 2015-09-09 | 广东美的暖通设备有限公司 | Air conditioner online system |
| CN106288485A (en) * | 2016-08-16 | 2017-01-04 | 广东美的暖通设备有限公司 | The adjustable air conditioning system of coolant quantity |
| CN106369864A (en) * | 2016-10-28 | 2017-02-01 | 广东美的制冷设备有限公司 | Circulation system and circulation method for air conditioner, and air conditioner |
| CN106765617A (en) * | 2017-02-21 | 2017-05-31 | 广东美的暖通设备有限公司 | Air injection enthalpy-increasing heat pump type air conditioning system, control method, control device and air-conditioner |
| CN206973925U (en) * | 2017-06-29 | 2018-02-06 | 广东美的暖通设备有限公司 | Multiple on-line system |
Non-Patent Citations (1)
| Title |
|---|
| 曾庆中，邓景山: "《车辆空调装置检修与维护》", 29 March 2013, 西南交通大学出版社 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915988A (en) * | 2019-02-19 | 2019-06-21 | 广东美的暖通设备有限公司 | The control method and device of multi-line system liquid impact prevention |
| CN109931677A (en) * | 2019-02-19 | 2019-06-25 | 广东美的暖通设备有限公司 | Interior machine crosses the control method and device of low temperature valve |
| CN109915988B (en) * | 2019-02-19 | 2021-05-04 | 广东美的暖通设备有限公司 | Control method and device for preventing multiple on-line systems from liquid impact |
| CN111854215A (en) * | 2019-04-24 | 2020-10-30 | 杭州三花研究院有限公司 | Heat pump system |
| CN111854215B (en) * | 2019-04-24 | 2023-08-22 | 杭州三花研究院有限公司 | heat pump system |
| CN110360709A (en) * | 2019-06-14 | 2019-10-22 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its control method |
| CN110360709B (en) * | 2019-06-14 | 2022-04-22 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and control method thereof |
| CN111895604A (en) * | 2020-07-24 | 2020-11-06 | 海信（山东）空调有限公司 | Air conditioner |
| CN111895604B (en) * | 2020-07-24 | 2021-10-22 | 海信（山东）空调有限公司 | Air conditioner |
| CN114857665A (en) * | 2022-05-30 | 2022-08-05 | 青岛海信日立空调系统有限公司 | Multi-split system |
| CN114857665B (en) * | 2022-05-30 | 2023-09-05 | 青岛海信日立空调系统有限公司 | Multi-split air conditioner system |
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