CN108870701A - A kind of multi-online air-conditioning system and pressure detection method - Google Patents
A kind of multi-online air-conditioning system and pressure detection method Download PDFInfo
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- CN108870701A CN108870701A CN201810962722.3A CN201810962722A CN108870701A CN 108870701 A CN108870701 A CN 108870701A CN 201810962722 A CN201810962722 A CN 201810962722A CN 108870701 A CN108870701 A CN 108870701A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/40—Fluid line arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of multi-online air-conditioning system and pressure detection method, and the multi-online air-conditioning system includes indoor unit and the outdoor unit that is connected to indoor unit, and outdoor unit includes compressor, outdoor heat exchanger, electric expansion valve and four-way valve；When indoor unit is in refrigeration mode, four-way valve is used to be connected to the input terminal of one end and compressor of the output end of compressor and one end of outdoor heat exchanger and indoor unit, and pressure sensor is used to detect the low voltage value of multi-online air-conditioning system at this time；When indoor unit is in heating mode, four-way valve switches to the input terminal of one end of output end and indoor unit and one end of outdoor heat exchanger and compressor for being connected to compressor, and pressure sensor is used to detect the high-voltage value of multi-online air-conditioning system at this time.That is, a pressure sensor is used only in multi-online air-conditioning system, so that it may detect condensing pressure when detection evaporating pressure, heating in refrigeration, to reduce costs, there is good practicability.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of multi-online air-conditioning system and pressure detection method.
Background technique
Multi-online air-conditioning system is widely used office, life due to its part throttle characteristics and significant energy-saving effect
Produce the occasions such as workshop.Currently, pressure sensor has fixed function in common multi-online air-conditioning system, for example, setting exists
Pressure sensor (i.e. high pressure sensor) on exhaust pipe is just only used to measure condenser pressure, and the pressure on air intake duct is arranged in
Sensor (i.e. low pressure sensor) is just only used to measure evaporating pressure, in actual use, may there is partial pressure sensing
The idle situation of device, pressure sensor utilization rate is insufficient, while increasing cost.
Summary of the invention
In view of this, the present invention is directed to propose a kind of multi-online air-conditioning system, to solve the above problems.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of multi-online air-conditioning system, the multi-online air-conditioning system include indoor unit and the room that is connected to the indoor unit
Outer machine, the outdoor unit include compressor, outdoor heat exchanger, electric expansion valve and four-way valve；The four-way valve, when the interior
For being connected to the output end of the compressor and one end and the interior of the outdoor heat exchanger when machine is in refrigeration mode
The input terminal of one end of machine and the compressor is switched to when the indoor unit is in heating mode for being connected to the compression
One end of one end and the outdoor heat exchanger of the output end of machine and the indoor unit and the input terminal of the compressor；It is described
The other end of outdoor heat exchanger is connected to through the electric expansion valve with the other end of the indoor unit；The four-way valve and the room
A pressure sensor is provided on connecting line between one end of interior machine, the pressure sensor is used at the indoor unit
The low voltage value of the multi-online air-conditioning system is detected when refrigeration mode and is used for when the indoor unit is in heating mode
Detect the high-voltage value of the multi-online air-conditioning system.
Further, it is provided with the first valve on the connecting line between the four-way valve and one end of the indoor unit,
The pressure sensor is set between the four-way valve and first valve.
Further, the four-way valve includes first port, second port, third port and the 4th port, and described first
Port connects one end of the indoor unit, and the second port connects the input terminal of the compressor, the third port connection
One end of the outdoor heat exchanger, the 4th port connect the output end of the compressor；When the indoor unit is in refrigeration
When mode, first port is connected to second port in the four-way valve, third port is connected to the 4th port；When the indoor unit
When in heating mode, first port is connected to the 4th port in the four-way valve, second port is connected to third port.
Further, the outdoor unit further includes oil-liquid separator, the oil-liquid separator be set to the compressor and
Between the four-way valve.
Further, the oil-liquid separator includes input port, gas outlet and oil outlet, the input of the oil-liquid separator
Mouth is connected to the output end of the compressor, and the gas outlet of the oil-liquid separator is connected to the four-way valve, the oil liquid point
It is connected to from the oil outlet of device with the input terminal of the compressor.
Further, the outdoor unit further includes gas-liquid separator, the gas-liquid separator be set to the compressor and
Between the four-way valve.
Further, the gas-liquid separator includes input port and delivery outlet, the input port of the gas-liquid separator and institute
Four-way valve connection is stated, the delivery outlet of the gas-liquid separator is connected to the input terminal of the compressor.
Further, second is provided on the connecting line between the electric expansion valve and the other end of the indoor unit
Valve.
Further, the indoor unit includes controller, the controller and the pressure sensor, compressor and electronics
Expansion valve is electrically connected；The controller, for reading the low voltage value and right when the indoor unit is in refrigeration mode
The compressor and the electric expansion valve are controlled and read the high pressure when the indoor unit is in heating mode
Value simultaneously controls the compressor and the electric expansion valve.
Compared with the existing technology, multi-online air-conditioning system of the present invention has the advantage that：
Multi-online air-conditioning system of the present invention, when indoor unit is in refrigeration mode, four-way valve is for being connected to compression
The input terminal of one end and compressor of the output end of machine and one end of outdoor heat exchanger and indoor unit, pressure sensor is used at this time
In the low voltage value of detection multi-online air-conditioning system；When indoor unit is in heating mode, four-way valve is switched to for being connected to compression
The input terminal of one end and compressor of the output end of machine and one end of indoor unit and outdoor heat exchanger, pressure sensor is used at this time
In the high-voltage value of detection multi-online air-conditioning system.That is, a pressure sensor is used only in multi-online air-conditioning system, so that it may
To detect condensing pressure when detection evaporating pressure, heating in refrigeration, to reduce costs, there is good practicability.
Another object of the present invention is to propose a kind of pressure detection method, to solve the above problems.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of pressure detection method, applied to above-mentioned multi-online air-conditioning system, the pressure detection method includes：Work as institute
State indoor unit it is in refrigeration mode when, the output end of four-way valve connection compressor and one end of the outdoor heat exchanger and
The input terminal of one end of the indoor unit and the compressor, the pressure sensor detect the low of the multi-online air-conditioning system
Pressure value；When the indoor unit is in heating mode, the four-way valve switches to the output end for being connected to the compressor and described
The input terminal of one end and the compressor of one end of indoor unit and the outdoor heat exchanger, the pressure sensor detect institute
State the high-voltage value of multi-online air-conditioning system.
Possessed advantage is identical compared with the existing technology with above-mentioned multi-online air-conditioning system for the pressure detection method,
This is repeated no more.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the structural block diagram of multi-online air-conditioning system described in the embodiment of the present invention；
Fig. 2 applies example schematic diagram for first of multi-online air-conditioning system described in the embodiment of the present invention；
Fig. 3 applies example schematic diagram for second of multi-online air-conditioning system described in the embodiment of the present invention；
Fig. 4 is the flow chart of pressure detection method described in the embodiment of the present invention.
Description of symbols：
1- multi-online air-conditioning system, 2- indoor unit, 3- outdoor unit, 4- compressor, 5- oil-liquid separator, 6- gas-liquid separation
Device, 7- four-way valve, 8- pressure sensor, the first valve of 9-, 10- outdoor heat exchanger, 11- electric expansion valve, the second valve of 12-.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In addition, the first valve 9 being previously mentioned in an embodiment of the present invention, refers to and is set to four-way valve 7 and indoor unit 2
Tracheae shut-off valve on connecting line between one end.The second valve 12 being previously mentioned in an embodiment of the present invention, refers to and sets
The liquid pipe shut-off valve being placed on the connecting line between electric expansion valve 11 and the other end of indoor unit 2, tracheae shut-off valve and liquid
Pipe shut-off valve is open-close on-off when being installed separately for indoor unit 2 and outdoor unit 3.It is mentioned in an embodiment of the present invention
To the controller of indoor unit 2 be electrically connected with pressure sensor 8, compressor 4 and electric expansion valve 11, refer to and pass through circuit
The controller of indoor unit 2 is linked together with pressure sensor 8, is connected the controller of indoor unit 2 and compressor 4 by circuit
It is connected together and the controller of indoor unit 2 and electric expansion valve 11 is linked together by circuit, so that pressure sensor
8 signal can pass to controller, the signal of controller can pass to compressor 4 and electric expansion valve 11.
In first and second be previously mentioned in an embodiment of the present invention, it is used merely to an entity or operates and is another
One entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this reality
Relationship or sequence.
The present invention provides a kind of multi-online air-conditioning systems 1, and a pressure sensor 8 can be used only and detect in refrigeration
Condensing pressure is detected when evaporating pressure, heating.Fig. 1 is please referred to, Fig. 1 is multi-online air-conditioning system 1 described in the embodiment of the present invention
Structural block diagram, which includes indoor unit 2 and the outdoor unit 3 that be connected to indoor unit 2, and outdoor unit 3 includes pressing
Contracting machine 4, oil-liquid separator 5, gas-liquid separator 6, four-way valve 7, pressure sensor 8, the first valve 9, outdoor heat exchanger 10, electronics
Expansion valve 11 and the second valve 12.
In the present embodiment, compressor 4 includes input terminal and output end, and the input terminal and gas-liquid separator 6 of compressor 4 connect
Logical, the output end of compressor 4 is connected to oil-liquid separator 5.
In the present embodiment, oil-liquid separator 5 is set between compressor 4 and four-way valve 7, and oil-liquid separator 5 includes defeated
The input port of entrance, gas outlet and oil outlet, oil-liquid separator 5 is connected to the output end of compressor 4, and oil-liquid separator 5 goes out
Port is connected to four-way valve 7, and the oil outlet of oil-liquid separator 5 is connected to the input terminal of compressor 4.
In the present embodiment, gas-liquid separator 6 is set between compressor 4 and four-way valve 7, and gas-liquid separator 6 includes defeated
The input port of entrance and delivery outlet, gas-liquid separator 6 is connected to four-way valve 7, delivery outlet and the compressor 4 of gas-liquid separator 6
Input terminal connection.
In the present embodiment, four-way valve 7, when indoor unit 2 is in refrigeration mode for be connected to compressor 4 output end and
The input terminal of one end of outdoor heat exchanger 10 and one end of indoor unit 2 and compressor 4, when indoor unit 2 is in heating mode
Switch to one end of output end and indoor unit 2 for being connected to compressor 4 and one end of outdoor heat exchanger 10 and compressor 4
Input terminal.The other end of outdoor heat exchanger 10 is connected to through electric expansion valve 11 with the other end of indoor unit 2.
Further, four-way valve 7 includes first port a, second port b, third port c and the 4th port d, first port
One end of a connection indoor unit 2, the input terminal of second port b connect compressor 4, the one of third port c connection outdoor heat exchanger 10
End, the output end of the 4th port d connect compressor 4；When indoor unit 2 is in refrigeration mode, in four-way valve 7 first port a with
Second port b connection, third port c are connected to the 4th port d；When indoor unit 2 is in heating mode, first in four-way valve 7
Port a is connected to the 4th port d, second port b is connected to third port c.
In the present embodiment, pressure biography is provided on the connecting line between four-way valve 7 and one end of the indoor unit 2
Sensor 8, pressure sensor 8 for when indoor unit 2 is in refrigeration mode detect multi-online air-conditioning system 1 low voltage value and
When indoor unit 2 is in heating mode for detecting the high-voltage value of multi-online air-conditioning system 1.
In the present embodiment, it is provided with the first valve 9 on the connecting line between four-way valve 7 and one end of indoor unit 2, presses
Force snesor 8 is set between four-way valve 7 and the first valve 9, and the first valve 9, which can be, is set to four-way valve 7 and indoor unit 2
Tracheae shut-off valve on connecting line between one end, tracheae shut-off valve are when being dispensed for indoor unit 2 and outdoor unit 3
Open-close on-off.
In the present embodiment, one end of outdoor heat exchanger 10 is connect with the third port c of four-way valve 7, outdoor heat exchanger 10
The other end be connected to through electric expansion valve 11 with the other end of indoor unit 2.
In the present embodiment, second is provided on the connecting line between electric expansion valve 11 and the other end of indoor unit 2
Valve 12, the second valve 12 can be on the connecting line being set between electric expansion valve 11 and the other end of indoor unit 2
Liquid pipe shut-off valve, liquid pipe shut-off valve are open-close on-offs when being installed separately for indoor unit 2 and outdoor unit 3.
Referring to figure 2., when indoor unit 2 is in refrigeration mode, 7 power-down state of four-way valve, first port a in four-way valve 7
Be connected to second port b, third port c is connected to the 4th port d, four-way valve 7 is used to be connected to output end and the outdoor of compressor 4
The input terminal of one end of heat exchanger 10 and one end of indoor unit 2 and compressor 4.
It is, refrigerant is since the input terminal of compressor 4, successively through oil liquid point when indoor unit 2 is in refrigeration mode
From device 5, the 4th port d of four-way valve 7, the third port c of four-way valve 7, outdoor heat exchanger 10, electric expansion valve 11, indoor unit
2, the first port a of four-way valve 7, the second port b of four-way valve 7, gas-liquid separator 6, are finally back to compressor 4.This fortune
Under row mode, pressure sensor 8 is for detecting evaporating pressure, i.e., as the low of low pressure sensor detection multi-online air-conditioning system 1
Pressure value.At this point, indoor unit 2 is used to read the evaporating pressure of the detection of pressure sensor 8 and according to the evaporating pressure to 4 He of compressor
Electric expansion valve 11 is controlled, for example, can be used to be precisely controlled the operation frequency of compressor 4 with the evaporating pressure detected
Rate, aperture of electric expansion valve 11 etc..
Referring to figure 3., when indoor unit 2 is in heating mode, 7 power-up state of four-way valve, first port a in four-way valve 7
Be connected to the 4th port d, second port b is connected to third port c, four-way valve 7 is used to be connected to output end and the interior of compressor 4
The input terminal of one end of machine 2 and one end of outdoor heat exchanger 10 and compressor 4.
It is, refrigerant is since the input terminal of compressor 4, successively through oil liquid point when indoor unit 2 is in heating mode
From device 5, the 4th port d of four-way valve 7, the first port a of four-way valve 7, indoor unit 2, electric expansion valve 11, outdoor heat exchanger
10, the third port c of four-way valve 7, the second port b of four-way valve 7, gas-liquid separator 6, are finally back to compressor 4.This fortune
Under row mode, pressure sensor 8 is for detecting condensing pressure, the i.e. height as high pressure sensor detection multi-online air-conditioning system 1
Pressure value.At this point, indoor unit 2 is used to read the condensing pressure of the detection of pressure sensor 8 and according to the condensing pressure to 4 He of compressor
Electric expansion valve 11 is controlled, for example, can be used to be precisely controlled the operation frequency of compressor 4 with the condensing pressure detected
Rate, aperture of electric expansion valve 11 etc..
In the present embodiment, indoor unit 2 includes controller, controller and pressure sensor 8, compressor 4 and electronic expansion
Valve 11 is electrically connected.The controller, the steaming detected for reading pressure sensor 8 when indoor unit 2 is in refrigeration mode
Hair pressure simultaneously controls compressor 4 and electric expansion valve 11 according to evaporating pressure, for example, the vapor pres- sure detected can be used
Power is for being precisely controlled running frequency, aperture of electric expansion valve 11 of compressor 4 etc.；When indoor unit 2 is in heating mode
It reads the condensing pressure that pressure sensor 8 detects and compressor 4 and electric expansion valve 11 is controlled according to condensing pressure, example
Such as, it can be used to be precisely controlled running frequency, the aperture of electric expansion valve 11 etc. of compressor 4 with the condensing pressure detected.
Referring to figure 4., Fig. 4 is the flow chart of pressure detection method described in the embodiment of the present invention.The pressure detection method
Applied to multi-online air-conditioning system 1, which includes the following steps：
Step S101, when indoor unit 2 is in refrigeration mode, four-way valve 7 is connected to the output end and outdoor heat exchange of compressor 4
The input terminal of one end of device 10 and one end of indoor unit 2 and compressor 4, pressure sensor 8 detect multi-online air-conditioning system 1
Low voltage value.
In the present embodiment, when indoor unit 2 is in refrigeration mode, 7 power-down state of four-way valve, first end in four-way valve 7
Mouthful a be connected to second port b, third port c is connected to the 4th port d, four-way valve 7 for be connected to the output end of compressor 4 with
The input terminal of one end of outdoor heat exchanger 10 and one end of indoor unit 2 and compressor 4.Under this operational mode, pressure sensing
Device 8 is for detecting evaporating pressure, the i.e. low voltage value as low pressure sensor detection multi-online air-conditioning system 1.
Further, indoor unit 2 includes controller, which reads the detected value of pressure sensor 8, when indoor unit 2
When in refrigeration mode, the evaporating pressure that the pressure sensor 8 read is detected is as the low pressure of multi-online air-conditioning system 1
Value, and compressor 4 and electric expansion valve 11 are controlled according to the low voltage value, for example, the running frequency of control compressor 4,
The aperture etc. of electric expansion valve 11.
Step S102, when indoor unit 2 is in heating mode, four-way valve 7 switches to output end and the room of connection compressor 4
The input terminal of one end of interior machine 2 and one end of outdoor heat exchanger 10 and compressor 4, pressure sensor 8 detect multi-gang air-conditioner
The high-voltage value of system 1.
In the present embodiment, when indoor unit 2 is in heating mode, 7 power-up state of four-way valve, first end in four-way valve 7
Mouthful a be connected to the 4th port d, second port b is connected to third port c, four-way valve 7 for be connected to the output end of compressor 4 with
The input terminal of one end of indoor unit 2 and one end of outdoor heat exchanger 10 and compressor 4.The other end of outdoor heat exchanger 10 is through electricity
Sub- expansion valve 11 is connected to the other end of indoor unit 2.Under this operational mode, pressure sensor 8 is for detecting condensing pressure, i.e.,
High-voltage value as high pressure sensor detection multi-online air-conditioning system 1.
Further, indoor unit 2 includes controller, which reads the detected value of pressure sensor 8, when indoor unit 2
When in heating mode, the condensing pressure that the pressure sensor 8 read is detected is as the high pressure of multi-online air-conditioning system 1
Value, and compressor 4 and electric expansion valve 11 are controlled according to the high-voltage value, for example, the running frequency of control compressor 4,
The aperture etc. of electric expansion valve 11.
The working principle of multi-online air-conditioning system 1 provided by the invention is：
When indoor unit 2 is in refrigeration mode, 7 power-down state of four-way valve, first port a and second port b in four-way valve 7
Connection, third port c are connected to the 4th port d, and four-way valve 7 is for being connected to the output end and outdoor heat exchanger 10 of compressor 4
The input terminal of one end and compressor 4 of one end and indoor unit 2, refrigerant is since the input terminal of compressor 4, successively through oil liquid point
From device 5, the 4th port d of four-way valve 7, the third port c of four-way valve 7, outdoor heat exchanger 10, electric expansion valve 11, indoor unit
2, the first port a of four-way valve 7, the second port b of four-way valve 7, gas-liquid separator 6, are finally back to compressor 4, this fortune
Under row mode, pressure sensor 8 is used to read the evaporating pressure of the detection of pressure sensor 8 for detecting evaporating pressure, indoor unit 2
And compressor 4 and electric expansion valve 11 are precisely controlled using the evaporating pressure as system low-voltage value；
When indoor unit 2 is in heating mode, 7 power-up state of four-way valve, first port a and the 4th port d in four-way valve 7
Connection, second port b be connected to third port c, four-way valve 7 for be connected to compressor 4 output end and indoor unit 2 one end with
And outdoor heat exchanger 10 one end and compressor 4 input terminal, refrigerant is since the input terminal of compressor 4, successively through oil liquid point
From device 5, the 4th port d of four-way valve 7, the first port a of four-way valve 7, indoor unit 2, electric expansion valve 11, outdoor heat exchanger
10, the third port c of four-way valve 7, the second port b of four-way valve 7, gas-liquid separator 6, are finally back to compressor 4, this fortune
Under row mode, pressure sensor 8 is used to read the condensing pressure of the detection of pressure sensor 8 for detecting condensing pressure, indoor unit 2
And the condensing pressure is precisely controlled compressor 4 and electric expansion valve 11 as system high pressure value.
Multi-online air-conditioning system 1 provided by the invention has the following advantages that compared with prior art：
Firstly, pressure sensor 8 is for detecting evaporating pressure, at indoor unit 2 when indoor unit 2 is in refrigeration mode
When heating mode, pressure sensor 8 is for detecting condensing pressure, it is, a pressure sensor 8 is used only, so that it may
Condensing pressure is detected when detection evaporating pressure, heating in refrigeration, is reduced costs；
Secondly, indoor unit 2 is used to read the evaporating pressure of the detection of pressure sensor 8 when indoor unit 2 is in refrigeration mode
And the evaporating pressure controls compressor 4 and electric expansion valve 11 as system low-voltage value, when indoor unit 2 is in heating mould
When formula, indoor unit 2 is used to read the condensing pressure of the detection of pressure sensor 8 and the condensing pressure as system high pressure value to compression
Machine 4 and electric expansion valve 11 are controlled, and achieve the purpose that be precisely controlled.
In conclusion a kind of multi-online air-conditioning system provided in an embodiment of the present invention and pressure detection method.The present invention is real
The multi-online air-conditioning system for applying example offer includes indoor unit and the outdoor unit that is connected to indoor unit, and outdoor unit includes compressor, room
External heat exchanger, electric expansion valve and four-way valve；Four-way valve, when indoor unit is in refrigeration mode for being connected to the output of compressor
One end of one end and indoor unit of end and outdoor heat exchanger and the input terminal of compressor, cut when indoor unit is in heating mode
Change the input terminal of one end of output end and indoor unit and one end of outdoor heat exchanger and compressor for being connected to compressor into；
The other end of outdoor heat exchanger is connected to through electric expansion valve with the other end of indoor unit；Between four-way valve and one end of indoor unit
A pressure sensor is provided on connecting line, pressure sensor is used to detect multi-connected machine when indoor unit is in refrigeration mode empty
The low voltage value of adjusting system and when indoor unit is in heating mode for detecting the high-voltage value of multi-online air-conditioning system.
Pressure detection method provided in an embodiment of the present invention is applied to above-mentioned multi-online air-conditioning system, the pressure detecting
Method includes：When indoor unit is in refrigeration mode, four-way valve be connected to compressor output end and outdoor heat exchanger one end with
And indoor unit one end and compressor input terminal, pressure sensor detect multi-online air-conditioning system low voltage value；Work as indoor unit
When in heating mode, four-way valve switches to the one of the output end of connection compressor and one end of indoor unit and outdoor heat exchanger
The input terminal at end and compressor, pressure sensor detect the high-voltage value of multi-online air-conditioning system.That is, multi-gang air-conditioner system
A pressure sensor is used only in system, so that it may condensing pressure is detected when detection evaporating pressure, heating in refrigeration, to reduce
Cost has good practicability.In addition, when indoor unit is in refrigeration mode, it is used for indoor machine in reading pressure sensor
The evaporating pressure of detection controls compressor and electric expansion valve, when indoor unit is in heating mode, it is used for indoor machine in
Controlling compressor and electric expansion valve for pressure sensor detection is read, achievees the purpose that be precisely controlled
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of multi-online air-conditioning system, which is characterized in that the multi-online air-conditioning system (1) include indoor unit (2) and with institute
The outdoor unit (3) of indoor unit (2) connection is stated, the outdoor unit (3) includes compressor (4), outdoor heat exchanger (10), electronic expansion
Valve (11) and four-way valve (7)；
The four-way valve (7), when the indoor unit (2) is in refrigeration mode for being connected to the output end of the compressor (4)
With the input terminal of one end of the outdoor heat exchanger (10) and one end of the indoor unit (2) and the compressor (4), work as institute
It states and switches to output end and the indoor unit (2) for being connected to the compressor (4) when indoor unit (2) is in heating mode
The input terminal of one end and the compressor (4) of one end and the outdoor heat exchanger (10)；
The other end of the outdoor heat exchanger (10) connects through the other end of the electric expansion valve (11) and the indoor unit (2)
It is logical；
A pressure sensor (8) are provided on connecting line between the four-way valve (7) and one end of the indoor unit (2),
The pressure sensor (8) is for detecting the multi-online air-conditioning system (1) when the indoor unit (2) is in refrigeration mode
Low voltage value and the high pressure for being used to detect the multi-online air-conditioning system (1) when the indoor unit (2) is in heating mode
Value.
2. multi-online air-conditioning system according to claim 1, which is characterized in that the four-way valve (7) and the indoor unit
(2) it is provided on the connecting line between one end the first valve (9), the pressure sensor (8) is set to the four-way valve
(7) between first valve (9).
3. multi-online air-conditioning system according to claim 1, which is characterized in that the four-way valve (7) include first port,
Second port, third port and the 4th port, the first port connect one end of the indoor unit (2), the second port
The input terminal of the compressor (4) is connected, the third port connects one end of the outdoor heat exchanger (10), the 4th end
Mouth connects the output end of the compressor (4)；When the indoor unit (2) is in refrigeration mode, first in the four-way valve (7)
Port is connected to second port, third port is connected to the 4th port；It is described when the indoor unit (2) is in heating mode
Four-way valve (7) interior first port is connected to the 4th port, second port is connected to third port.
4. multi-online air-conditioning system according to claim 1, which is characterized in that the outdoor unit (3) further includes oil liquid point
From device (5), the oil-liquid separator (5) is set between the compressor (4) and the four-way valve (7).
5. multi-online air-conditioning system according to claim 4, which is characterized in that the oil-liquid separator (5) includes input
Mouth, gas outlet and oil outlet, the input port of the oil-liquid separator (5) are connected to the output end of the compressor (4), the oil
The gas outlet of liquid/gas separator (5) is connected to the four-way valve (7), the oil outlet and the compressor of the oil-liquid separator (5)
(4) input terminal connection.
6. multi-online air-conditioning system according to claim 1, which is characterized in that the outdoor unit (3) further includes gas-liquid point
From device (6), the gas-liquid separator (6) is set between the compressor (4) and the four-way valve (7).
7. multi-online air-conditioning system according to claim 6, which is characterized in that the gas-liquid separator (6) includes input
Mouthful and delivery outlet, the input port of the gas-liquid separator (6) be connected to the four-way valve (7), the gas-liquid separator (6) it is defeated
Outlet is connected to the input terminal of the compressor (4).
8. multi-online air-conditioning system according to claim 1, which is characterized in that the electric expansion valve (11) and the room
The second valve (12) are provided on connecting line between the other end of interior machine (2).
9. multi-online air-conditioning system according to claim 1, which is characterized in that the indoor unit (2) includes controller, institute
Controller is stated to be electrically connected with the pressure sensor (8), compressor (4) and electric expansion valve (11)；
The controller, for reading the low voltage value when the indoor unit (2) is in refrigeration mode and to the compressor
(4) it is controlled with the electric expansion valve (11) and reads the high pressure when the indoor unit (2) is in heating mode
Value simultaneously controls the compressor (4) and the electric expansion valve (11).
10. a kind of pressure detection method, which is characterized in that be applied to the described in any item multi-gang air-conditioner systems of claim 1-9
It unites (1), the method includes：
When the indoor unit (2) is in refrigeration mode, the output end of four-way valve (7) connection compressor (4) and the room
The input terminal of one end of external heat exchanger (10) and one end of the indoor unit (2) and the compressor (4), the pressure sensing
Device (8) detects the low voltage value of the multi-online air-conditioning system (1)；
When the indoor unit (2) is in heating mode, the four-way valve (7) switches to the output for being connected to the compressor (4)
One end of one end and the outdoor heat exchanger (10) of end and the indoor unit (2) and the input terminal of the compressor (4), institute
State the high-voltage value that pressure sensor (8) detect the multi-online air-conditioning system (1).
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Application publication date: 20181123 |