WO2014111041A1

WO2014111041A1 - Air-conditioning system, control system and air-conditioning control method

Info

Publication number: WO2014111041A1
Application number: PCT/CN2014/070796
Authority: WO
Inventors: 李进; 钟明; 张少龙; 张晟; 高向军
Original assignee: 四川长虹电器股份有限公司
Priority date: 2013-01-18
Filing date: 2014-01-17
Publication date: 2014-07-24
Also published as: CN103062840A; CN103062840B

Abstract

Disclosed are an air-conditioning system, a control system and an air-conditioning control method. The air-conditioning system comprises M outdoor units (101) for providing heat sources or cold sources, M being a positive integer; N indoor units (102) for receiving a heat source(s) or a cold source(s) supplied by one or more outdoor units (101) of the at least one outdoor unit (101), N being a positive integer; a control system (103) comprising a lubricant allocating subsystem (1031) connected to the M outdoor units (101), the lubricant allocating subsystem (1031) comprising a gas-liquid separator F1 and an oil separator F2 which are connected via a first connecting pipeline D1; a refrigerant allocating subsystem (1032) connected to the M outdoor units (101); and a control subsystem (1033) connected to the N indoor units (102), the M outdoor units (101), the lubricant allocating subsystem (1031) and the refrigerant allocating subsystem (1032).

Description

Air conditioning system, control system and air conditioning control method

This application claims priority to Chinese Patent Application No. 201310018365.2, entitled "An Air Conditioning System, Control System and Air Conditioning Control Method", issued on January 18, 2013, the entire contents of which are incorporated by reference. In this application. Technical field

The present invention relates to the field of air conditioning technology, and in particular, to an air conditioning system, a control system, and an air conditioning control method. Background technique

Air conditioning, or room air conditioner, is a unit that provides a change in process air temperature to a space area (typically hermetic). Its function is to adjust the temperature, humidity, cleanliness and air flow rate of the air in the room (or enclosed space, area) to meet the requirements of human comfort or process. Conventionally, an air conditioner as a refrigerating apparatus is known in which an indoor unit is connected to an outdoor unit through a refrigerant pipe.

Air conditioners are divided into single-cooled air conditioners and dual-use air conditioners. The working principle is the same. The refrigerant used in air conditioners is freon. The characteristics of Freon are: When the gas is changed from a gaseous state to a liquid state, a large amount of heat is released. When it changes from a liquid state to a gaseous state, it absorbs a lot of heat. Air conditioning is designed according to this principle.

The compressor compresses the gaseous refrigerant into a high-temperature high-pressure gas refrigerant, and then sends it to the condenser (outdoor unit) to become a normal-temperature high-pressure liquid refrigerant, so that the outdoor unit blows out hot air.

Then to the capillary, into the evaporator (indoor unit), because the space suddenly increases after the refrigerant reaches the evaporator from the capillary, the pressure is reduced, the liquid refrigerant vaporizes, and becomes a gaseous low-temperature refrigerant, thereby absorbing a large amount of The heat, the evaporator will become cold, the fan of the indoor unit will blow the indoor air from the evaporator, so the indoor unit blows out the cold air; the water vapor in the air will condense into water droplets when it encounters the cold evaporator. , flow out along the water pipe, this is the reason why the air conditioner will come out. When heating, there is a component called a four-way valve, so that the flow direction of the refrigerant in the condenser and the evaporator is opposite to that in the case of cooling, so when the heating is performed, the outdoor air is blown by the cold air, and the indoor unit is blown by the hot air.

In the prior art, for the home user, the central air conditioner is usually not used, but the split air conditioner is used, that is, in an air conditioner, there is an outdoor unit and an indoor unit working with the outdoor unit. When air conditioning is used, different air conditioners need to be arranged in different places, such as: one in the living room, one in the bedroom, and one in the restaurant. Each air conditioner has a remote control. Through the remote control, the user can control each air conditioner, such as: power on, power off, temperature adjustment, etc.

In the process of implementing the technical solutions in the embodiments of the present application, the inventors of the present application have at least found the following technical problems in the prior art:

In the central air conditioner of the prior art, a plurality of pipes are connected between the gas-liquid separator and the oil separator, so that the connection between the gas-liquid separator and the oil separator is complicated, and components that need to be controlled during control are required. There are many, so there are technical problems of low system reliability and high manufacturing cost.

The central air conditioner in the prior art can realize heating or cooling of a plurality of indoor units through a plurality of outdoor units assembled together, but in a plurality of sets of central air conditioners, it also fails to pass a centralized control platform. However, multiple sets of central air conditioners are networked and controlled. Therefore, there is also a technical problem that effective centralized control cannot be achieved, and the cold source or heat source of each group of central air conditioners is allocated as needed.

In the prior art central air conditioner, there are a plurality of compressors in the outdoor unit, which requires oil equalization control of the lubricating oil in the compressor, but in the prior art, in the oil equalization realization scheme, the compressor is required. The structure is more or less modified, or it is necessary to connect pipes for oil equalization between the compressors. Therefore, there are technical problems in that the implementation scheme is complicated.

In the prior art, the split air conditioners that are separately installed and operated cannot be centrally controlled, and need to be separately controlled, so that each air conditioner may require its own control device, requiring more hardware or software resources, and wasting resources. And the control is also more complicated.

Moreover, each split air conditioner in the prior art cannot be operated in a network, and an outdoor unit can only supply cooling or heating to a fixed corresponding indoor unit, and cannot allocate a cold source or a heat source according to the overall needs, which is likely to cause waste of resources. Moreover, because the split air conditioner in the prior art cannot be operated in a network, if the outdoor unit in a split air conditioner fails, the corresponding indoor unit is in a normal state, but because the outdoor unit corresponding thereto is faulty, It is also unusable and is not conducive to resource utilization. Summary of the invention

Embodiments of the present invention provide an air conditioning system, a control system, and an air conditioning control method, which are used to solve the problems of the complicated central air conditioning system in the prior art, and the low utilization rate of one-to-one resources of the indoor and outdoor air conditioners of the household split air conditioner. The existing split air conditioners are effectively integrated with minor changes or even no changes, completely breaking the one-to-one restriction of household split air conditioners, and satisfying more indoor unit cooling with only a small number of outdoor units. Heating demand not only simplifies the system structure, reduces control complexity, but also improves the degree of intelligence and centralized control, improves the utilization of outdoor units, increases the convenience of control operations, and reduces the technical effect of cost. Improve the user experience.

Moreover, in the prior art, a large number of pipes are connected between the gas-liquid separator and the oil separator, so that the connection between the gas-liquid separator and the oil separator is complicated, and more components are required for control during control. Therefore, there are technical problems of low system reliability and high manufacturing cost. The embodiment of the invention realizes reducing the number of connecting pipes and valves at the bottom of the gas-liquid separator, correspondingly reducing control points and welding points, saving hardware resources, reducing costs, simplifying system structure, reducing maintenance complexity, and effectively improving The technical effect of system reliability.

An air conditioning system comprising:

M outdoor units for providing a heat source or a cold source, wherein M is a positive integer;

N indoor units for receiving a heat source or a cold source provided by one or more of the M outdoor units; N is a positive integer;

Control system, including:

a lubricating oil distribution subsystem, which is connected to each of the M outdoor units, wherein the lubricating oil distribution subsystem includes a gas-liquid separator and an oil separator; wherein the gas-liquid separator and The oil separator is connected by a first connecting pipe and a second connecting pipe, wherein the first connecting pipe and the second connecting pipe are used for transferring refrigerant between the gas-liquid separator and the oil separator Oil

a refrigerant distribution subsystem, connected to each of the M outdoor units;

a control subsystem, connected to each of the M outdoor units, each of the N indoor units, the lubricating oil distribution subsystem, and the refrigerant distribution subsystem;

Wherein, when the control subsystem receives a first control instruction for controlling one or more of the N indoor units, the control subsystem executes the first control instruction, The refrigerant distribution subsystem controls to output a first amount of heat source or cold source corresponding to the first control command to the one or more indoor units, and control the lubricating oil distribution subsystem to The amount of oil in each of the one or more of the M outdoor units corresponding to the one or more indoor units is within a preset amount of oil.

Preferably, the gas-liquid separator is a two-way gas-liquid separator, one side of the first connecting pipe is connected to the oil separator, and the other side of the first connecting pipe is located in the gas-liquid separation Inside the device, one side of the second connecting pipe is connected to the N indoor units, and the other side of the second connecting pipe is located inside the gas-liquid separator, the first connecting pipe and the first The shape of the two connecting pipes inside the gas-liquid separator is U-shaped.

Preferably, the lubricating oil distribution subsystem further includes a first valve unit;

The gas-liquid separator is configured to separate the refrigerant from the oil, and transport the separated refrigerant and oil through the first connecting pipe to one or more of the oil separator or the N indoor units Indoor unit

The oil separator is used to separate oil from refrigerant;

The first valve unit is configured to control transmission of a heat source or a cold source between the control system and the M outdoor units.

Preferably, the refrigerant distribution subsystem comprises: a second valve unit, configured to control the transmission of the refrigerant between the control system and the at least one outdoor unit.

Preferably, the air conditioning system further includes:

Detection module

The control subsystem includes: a receiving module, a processing module, and a sending module; The receiving module is configured to receive the first control instruction;

The processing module is configured to execute the first control instruction to control the lubricating oil distribution subsystem and/or the refrigerant distribution subsystem; and receive, by the receiving module, detection information sent by the detection module, And generating a corresponding control instruction according to the detection information;

The sending module is configured to send a corresponding control command to a corresponding one of the M outdoor units.

Preferably, the control subsystem further includes an input module, and is connected to the processing module, and configured to input the first control instruction according to an operation input by a user.

A control system, the control system comprising:

Case

a circuit board disposed in the casing;

a lubricating oil distribution subsystem, disposed on the circuit board, and connected to each of the M outdoor units; wherein the lubricating oil distribution subsystem includes a gas-liquid separator and an oil separator, The gas-liquid separator and the oil separator are connected by a first connecting pipe and a second connecting pipe, and the first connecting pipe and the second connecting pipe are used for separating the gas-liquid separator and the oil Transfer of refrigerant and oil between the devices;

a refrigerant distribution subsystem, disposed on the circuit board and connected to the M outdoor units;

a control subsystem disposed on the circuit board and connected to the N indoor units, the M outdoor units, the lubricating oil distribution subsystem, and the refrigerant distribution subsystem;

A power supply device is disposed in the casing for supplying power to the lubricating oil distribution subsystem, the refrigerant distribution subsystem, and the control subsystem.

Preferably, the lubricating oil distribution subsystem further includes a first valve unit; The gas-liquid separator is configured to separate the refrigerant from the oil, and transmit the separated refrigerant and oil through the connecting pipe to the oil separator or one or more indoor units of the N indoor units ;

The oil separator is used to separate oil from refrigerant;

The first valve unit is configured to control transmission of a heat source or a cold source between the control system and the at least one outdoor unit.

An air conditioning control method, the method is applied to an air conditioning system, the air conditioning system includes M outdoor units, N indoor units, and a control system, and the control system includes a lubricating oil distribution subsystem, a refrigerant distribution subsystem, and a controller. a system, wherein the lubricating oil distribution subsystem includes a gas-liquid separator and an oil separator, wherein the gas-liquid separator and the oil separator are connected by a first connecting pipe and a second connecting pipe, the first a connecting pipe and the second connecting pipe for transferring refrigerant and oil between the gas-liquid separator and the oil separator; the method comprising the steps of:

Receiving a first control instruction;

Performing the first control instruction, controlling the refrigerant distribution subsystem, and outputting, to the one or more indoor units, a first quantity of heat source or cold source corresponding to the first control instruction, and The lubricating oil distribution subsystem performs control such that the amount of oil in each of the one or more outdoor units of the M outdoor units corresponding to the one or more indoor units is within a preset amount of oil Inside.

Preferably, the first control instruction is executed to control the refrigerant distribution subsystem, and output a first quantity of heat source or cold source corresponding to the first control instruction to the one or more indoor units The steps include:

Executing the first control instruction, starting a detection module in the air conditioning system, and obtaining one or more oil quantity values of one or more of the M outdoor units detected by the detection module;

When it is determined that the oil quantity value of the P outdoor units of the M outdoor units is greater than the upper limit value of the preset oil quantity range, generating a second control instruction; Sending the second control command to the corresponding P outdoor units to instruct the P outdoor units to reduce the operating frequency, so that the p outdoor units will exceed the preset oil amount range of excess oil The quantity is output so that the amount of oil stored in the M outdoor units is equalized; wherein P is an integer not less than 0 and less than M.

Executing the first control instruction, starting a detection module in the air conditioning system, to obtain one or more oil quantity values of one or more outdoor units of the M outdoor units detected by the detection module;

When it is determined that the oil quantity values of the P outdoor units of the M outdoor units are less than the lower limit value of the preset oil quantity range, generating a fourth control instruction;

Sending the fourth control command to the corresponding P outdoor units to instruct the P outdoor units to increase the operating frequency, so that the P outdoor units are obtained from corresponding outdoor units of the MP outdoor units Lubricating oil, thereby equalizing the amount of oil stored in the M outdoor units; wherein P is an integer not less than 0 and less than M.

Preferably, after receiving the first control instruction, the method further comprises the steps of:

Executing the first control instruction, starting a detection module in the air conditioning system, and obtaining a refrigerant content value and the number in the first outdoor unit of the M outdoor units detected by the detection module The value of the refrigerant content in the outdoor unit;

When it is determined that the refrigerant content value in the first outdoor unit is smaller than the refrigerant content value in the second outdoor unit, generating a sixth control instruction;

Executing the sixth control command to input a second amount of refrigerant to the first outdoor unit by controlling the refrigerant distribution subsystem, and input a third amount of refrigerant to the second outdoor unit, wherein The second magnitude is greater than the third magnitude.

An embodiment of the present invention provides an air conditioning system, a control system, and an air conditioning control method, which are used to solve the problem that the central air conditioner in the prior art has more pipelines connected between the gas-liquid separator and the oil separator. The connection between the gas-liquid separator and the oil separator is complicated, and there are many components that need to be controlled during the control. Therefore, there are technical problems of low system reliability and high manufacturing cost, and the gas-liquid separation is reduced. The number of connecting pipes and valves at the bottom of the device reduces the control points and welding points, saves hardware resources, reduces costs, simplifies the system structure, reduces maintenance complexity, and effectively improves the technical effect of system reliability. DRAWINGS

1 is a main structural diagram of an air conditioning system according to an embodiment of the present invention;

2 is a schematic view showing a simple structure of an air conditioning system according to an embodiment of the present invention;

3 is a main structural diagram of an air conditioning system according to an embodiment of the present invention;

4 is a detailed structural diagram of an air conditioning system according to an embodiment of the present invention;

FIG. 5 is a main flowchart of a method for controlling an air conditioner according to an embodiment of the present invention. detailed description

In the embodiment of the present invention, an air conditioning system is provided for solving the problem that the connection between the gas-liquid separator and the oil separator in the household air conditioner is complicated in the prior art, and more components need to be controlled during the control, so There are technical problems of low system reliability and high manufacturing costs.

In order to solve the above technical problem, the general idea of the technical solution in the embodiment of the present application is as follows: An air conditioning system is provided, including: M outdoor units, for providing a heat source or a cold source, wherein M is a positive integer; N indoors And receiving a heat source or a cold source provided by one or more of the M outdoor units; N is a positive integer; the control system includes: a lubricating oil distribution subsystem, and the M outdoor units Each of the outdoor unit connections, wherein the lubricating oil distribution subsystem includes a gas-liquid separator and an oil separator; wherein the gas-liquid separator and the oil separator pass through the first connecting pipe and the second Connected pipes are connected, the first connecting pipe and the second connecting pipe are used for transferring refrigerant and oil between the gas-liquid separator and the oil separator; a refrigerant distribution subsystem, and the M outdoor Each outdoor unit in the machine is connected; a control subsystem, and each of the M outdoor units, each of the N indoor units, the lubricating oil distribution subsystem, and the cold a media distribution subsystem connection; wherein, when the control subsystem receives a first control instruction for controlling one or more of the N indoor units, the control subsystem executes the first Controlling a control, the refrigerant distribution subsystem is controlled to output a first amount of heat source or cold source corresponding to the first control command to the one or more indoor units, and to the lubricating oil distributor The system performs control such that the amount of oil in each of the one or more of the M outdoor units corresponding to the one or more indoor units is within a preset amount of oil.

That is, in the technical solution in the embodiment of the present invention, a plurality of outdoor units and a plurality of indoor units are connected to the control system, that is, a plurality of outdoor units and a plurality of indoor units are networked, so that the control system can pass through The control system can control the heat source content, the cold source content or the refrigerant content in the outdoor unit according to the received corresponding control command, and can also control the parameters of the indoor unit accordingly, for example, can control the wind direction of the indoor unit, Wind speed, temperature, power switch, etc., can be effectively solved for solving the technical problems in the prior art that only one air conditioner can be controlled and operated separately, so that the operation convenience is poor and the time required is long. Therefore, the control of each outdoor unit or the outdoor unit in the network can be realized by a control system, the operation is simple, the operation efficiency is high, and the control system can select the energy-saving way to make the corresponding outdoor unit under the same conditions. Or indoor unit work, can achieve energy-saving effect, but also simplified for users For the process.

The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to Fig. 1, an air conditioning system in an embodiment of the present invention may include an outdoor unit 101, an indoor unit 102, and a control system 103. The air conditioning system may include M outdoor units 101 and N indoor units 102, where M and N are both positive integers.

In the embodiment of the present invention, the connection manners of the M outdoor units 101, the N indoor units 102, and the control system 103 may be a branch connection mode, a direct connection mode, a hybrid connection mode, or other types of connection modes. The invention does not limit this.

The control system 103 in the embodiment of the present invention may be located between the outdoor unit 101 and the indoor unit 102, and connected to the outdoor unit 101 and the indoor unit 102, respectively, or the control system 103 may be located in any one of the outdoor units 101, or may be controlled. The system can also be located in any of the indoor units 102. Alternatively, the control system 103 may be located at other locations, which is not limited by the present invention. In FIG. 1, the control system 103 is located between the outdoor unit 101 and the indoor unit 102.

In the embodiment of the present invention, the outdoor unit 101 and the indoor unit 102 may be the outdoor unit 101 and the indoor unit 102 in the split air conditioner, or may be the outdoor unit 101 and the indoor unit 102 in the central air conditioner. An outdoor unit 101 in the embodiment of the present invention may include only one compressor, or may include a plurality of compressors.

The outdoor unit 101 can be used to provide a heat source or a cold source.

The indoor unit 102 can be configured to receive a heat source or a cold source provided by one or more of the outdoor units 101 of the at least one outdoor unit 101.

Control system 103 can include a lube oil distribution subsystem 1031, a refrigerant distribution subsystem 1032, and a control subsystem 1033.

The lubricating oil distribution subsystem 1031 can be connected to the M outdoor units 101, the refrigerant distribution subsystem 1032 can be connected to the M outdoor units 101, and the control subsystem 1033 can be distributed with the M outdoor units 101, the N indoor units 102, and the lubricating oil. Both the subsystem 1031 and the refrigerant distribution subsystem 1032 are connected.

The lubricating oil distribution subsystem 1031 in the embodiment of the present invention may include a gas-liquid separator F1 and an oil separator F2, and the gas-liquid separator F1 and the oil separator F2 may be connected through the first connecting pipe D1 and the second connecting pipe D2. The first connecting pipe D1 and the second connecting pipe D2 may be used to transfer refrigerant and oil between the gas-liquid separator F1 and the oil separator F2.

Wherein, when the control subsystem 1033 receives the first control instruction for controlling one or more of the N indoor units 102, the control subsystem 1033 may execute the first control instruction to allocate a refrigerant to the refrigerant. The system 1032 performs control to output a first or a plurality of heat sources or cold sources corresponding to the first control command to the one or more indoor units 102, and control the lubricating oil distribution subsystem 1031 to The amount of oil in each of the one or more outdoor units 101 of the M outdoor units 101 corresponding to the plurality of indoor units 102 is within a preset amount of oil.

As shown in FIG. 2, it is a schematic diagram of a simple structure of the control system 103 in the embodiment of the present invention. The lubricating oil distribution subsystem 1031 in the embodiment of the present invention may include a separator unit 10311 and a first valve unit 10312. A separator unit 10311 can be used to separate the gas from the liquid. The first valve unit 10312 can be used to control the transmission of a heat source or a cold source between the control system 103 and the at least one outdoor unit 101.

The refrigerant distribution subsystem 1032 can include a second valve unit 10321 that can be used to control the transfer of refrigerant between the control system 103 and the at least one outdoor unit 101.

As shown in Fig. 3, the separator unit 10311 in the embodiment of the present invention may include a gas-liquid separator F1 and an oil separator F2.

The gas-liquid separator F1 can be used for separating the refrigerant and the oil, and transferring the separated refrigerant and oil to the oil separator F1 or the N indoors through the first connecting pipe D1 and the second connecting pipe D2, respectively. One or more indoor units 102 in the machine 102.

In the embodiment of the present invention, the gas-liquid separator F1 may be a two-way gas-liquid separator F1. Referring to FIG. 3, one side of the second connecting pipe D2 is connected to the oil separator F2, and the other side of the second connecting pipe D2 is located inside the gas-liquid separator F1, the first connection One side of the pipe D1 is connected to the N indoor units 102, and the other side of the first connecting pipe D1 is located inside the gas-liquid separator F1, the first connecting pipe D1 and the second connecting pipe The shape of D2 inside the gas-liquid separator F1 is U-shaped.

The first connecting pipe D1 and the second connecting pipe D2 may be arranged side by side.

For example, in the air conditioning refrigeration, the refrigerant and the oil may flow from the indoor unit 102 into the first connecting pipe D1, and the first connecting pipe D1 is discharged from the side of the gas-liquid separator F1, and enters the gas-liquid separator F1, wherein the gas state The refrigerant then enters the second connecting pipe D2 from the side of the second connecting pipe D2 located in the gas-liquid separator F1, flows into the oil separator F2 via the second connecting pipe D2, and the oil therein can pass through the lower side of the second connecting pipe D2 The first opening (ie, the A hole in FIG. 3) enters the second connecting pipe D2 and flows into the oil separator F2 via the second connecting pipe D2.

For example, when the air conditioner is heating, the refrigerant and the oil may flow from the oil separator F2 into the second connecting pipe D2, and the second connecting pipe D2 is discharged from the side of the gas-liquid separator F1, and enters the gas-liquid separator F1, wherein The gaseous refrigerant enters the first connecting pipe D1 from the side of the first connecting pipe D1 located in the gas-liquid separator F1, flows into the corresponding indoor unit 102 via the first connecting pipe D1, and the oil therein can pass through the first connecting pipe D1. The second opening below (ie the B hole in Figure 3) enters the first connection The pipe D1 flows into the corresponding indoor unit 102 via the first connecting pipe D1.

In this way, it is not necessary to provide a connecting pipe between the bottom of the gas-liquid separator F1 and the bottom of the oil separator F2 for the transmission of lubricating oil, thereby saving the connecting pipe and simplifying the system structure.

The oil separator F2 can be used to separate the oil from the refrigerant.

The first valve unit 10312 may include a first valve R1, M second valves R2, M third valves R3, a fourth valve R4, a fifth valve R5, a sixth valve R6, a seventh valve R7, and an eighth valve R8. , the ninth valve R9 and the tenth valve R10. In Fig. 3, the air conditioning system includes two outdoor units 101 and four indoor units 102 as an example.

Here, the control system 103 is not shown in Fig. 3, and in Fig. 3, the air conditioning system includes four indoor units 102 and two outdoor units 101. If the number of outdoor units 101 changes and/or the number of indoor units 102 changes, those skilled in the art will naturally know how to modify according to the idea of the present invention.

In the embodiment of the present invention, the gas-liquid separator F1 is a two-way gas-liquid separator. By using the gas-liquid separator, the number of connecting pipes and valves at the bottom of the gas-liquid separator is reduced, and the control points and the welding points are correspondingly reduced, thereby saving Hardware resources, reduce costs, simplify system structure, reduce maintenance complexity, and effectively improve system reliability.

In the embodiment of the present invention, the control system 103 may receive the first control instruction, where the first control instruction may be used to control one or more indoor units 102 of the N indoor units 102 to be powered on, powered off, or The first control command may be used to control the wind direction of one or more of the N indoor units 102, the fan speed, the temperature, the set start time, or the set shutdown time, and the like.

Referring to FIG. 4, the air conditioning system may further include a detection module 401, and the detection module 401 may be configured to detect one or more oil quantity values in one or more of the M outdoor units 101.

In the embodiment of the present invention, the control subsystem 1033 may specifically include a receiving module, a processing module, and a sending module.

The receiving module can be configured to receive the first control instruction.

The processing module is configured to execute the first control instruction to allocate a subsystem 1031 to a lubricating oil And/or the refrigerant distribution subsystem 1032 performs control; receives, by the receiving module, detection information sent by the detection module 401, and generates a corresponding control instruction according to the detection information.

The transmitting module is configured to send a corresponding control command to a corresponding outdoor unit 101 of the M outdoor units 101.

In the embodiment of the present invention, the control subsystem 1033 may further include an input module, and the input module may send the first control instruction to the receiving module according to an operation of a user.

The embodiment of the present invention further provides a control system, the control system may include a casing; a circuit board, the circuit board may be disposed in the casing; the lubricating oil distribution subsystem 1031, the lubricating oil distribution subsystem 1031 may It is disposed on the circuit board and connected to the M outdoor units 101. The lubricating oil distribution subsystem 1031 may include a gas-liquid separator F1 and an oil separator F2, the gas-liquid separator and the oil separator. The first connecting pipe D1 and the second connecting pipe D2 are used to transfer the refrigerant and the oil between the gas-liquid separator F1 and the oil separator F2 through the first connecting pipe D1 and the second connecting pipe D2; a distribution subsystem 1032, a refrigerant distribution subsystem 1032 may be disposed on the circuit board and connected to the M outdoor units 101; a control subsystem 1033 may be disposed on the circuit board, and the M outdoor units 101, The N indoor units 102, the lubricating oil distribution subsystem 1031 and the refrigerant distribution subsystem 1032 are connected; the power supply device may be disposed in the casing for distributing the lubricating oil The system 1031, the refrigerant distribution subsystem 1032, and the control subsystem 1033 are powered. That is, the control system in the embodiment of the present invention may include the air conditioning system.

The first connecting pipe D1 and the second connecting pipe D2 may be disposed on the circuit board or may not be disposed on the circuit board.

Referring to FIG. 5, the present invention further provides an air conditioning control method, where the method can be applied to the air conditioning system, and the main processes of the method are as follows:

Step 501: Receive a first control instruction.

The control subsystem 1033 may receive the first control instruction, where the first control instruction may be directly sent by the user, or may be generated by the input module according to a user operation.

For example, the user can perform a first operation through a handheld device connected to the control subsystem 1033, and the control subsystem 1033 is equivalent to receiving the first control when the user performs the first operation. Instruction. Alternatively, the user may perform the first operation through an electronic device connected to the control subsystem 1033, and the input module included in the control subsystem 1033 may generate the first control command according to the first operation, which is also equivalent to the controller. System 1033 receives the first control command.

In the embodiment of the present invention, the first control instruction may be used to control one or more indoor units 102 of the N indoor units 102 to be powered on or off, or the first control instruction may be used to control the N The wind direction of one or more indoor units 102 in the indoor unit 102, the fan speed, the temperature, the set start time, the set shutdown time, and the like.

Step 502: Perform the first control instruction, and control the refrigerant distribution subsystem 1032 to output a first quantity of heat source or cold source corresponding to the first control instruction to the one or more indoor units 102. And controlling the lubricating oil distribution subsystem 1031 to make each of the one or more outdoor units 101 of the M outdoor units 101 corresponding to the one or more indoor units 102 The amount of oil is within the preset amount of oil.

The control subsystem 1033 can execute the first control instruction, start the detection module 401, and cause the detection module 401 to measure one or more oil values in one or more of the M outdoor units 101. The detection is performed, and one or more oil quantity values of one or more of the M outdoor units 101 detected by the detecting module 401 are obtained.

If it is determined that the oil amount value of the P outdoor units 101 in the M outdoor units 101 is greater than the upper limit value of the preset oil amount range, a second control command may be generated.

The second control instruction may be sent to the corresponding P outdoor units 101 to instruct the P outdoor units 101 to lower the operating frequency, so that the P outdoor units 101 will exceed the preset amount of oil. The excess amount of oil in the range is output so that the amount of oil stored in the M outdoor units 101 is equalized, wherein P may be an integer not less than 0 and less than M.

That is, if it is detected that there is a large amount of oil in the outdoor unit 101, the operating frequency of the outdoor unit 101 having a large amount of oil can be correspondingly reduced, so that the outdoor unit 101 can discharge excess oil, and the discharged oil can directly enter. Other outdoor units 101 having a higher operating frequency may be cycled after entering the corresponding indoor unit 102. Therefore, it is avoided that the outdoor unit 101 is easily damaged due to the high oil content.

The control subsystem 1033 can execute the first control instruction, and start the detection module 401. The detecting module 401 detects one or more oil quantity values in one or more of the M outdoor units 101, and obtains one of the M outdoor units 101 detected by the detecting module 401. Or one or more oil quantity values in multiple outdoor units.

When it is determined that the oil amount value of the P outdoor units 101 in the M outdoor units 101 is smaller than the lower limit value of the preset oil amount range, the control subsystem 1033 may generate a fourth control command.

The fourth control command may be sent to the corresponding P outdoor units 101 to instruct the P outdoor units 101 to increase the operating frequency, so that the P outdoor units 101 are from the MP outdoor units 101. The lubricating oil is obtained in the corresponding outdoor unit 101, so that the amount of oil stored in the M outdoor units 101 is equalized, wherein P may be an integer not less than 0 and less than M.

That is, if it is detected that the amount of oil in the outdoor unit 101 is small, the operating frequency of the outdoor unit 101 having a large amount of oil can be increased correspondingly, so that the outdoor units 101 can be taken in or taken out from the other outdoor unit 101. The amount of oil transferred is prevented from being easily damaged due to the low oil content of the outdoor unit 101.

The control subsystem 1033 can execute the first control instruction, start the detection module 401, and cause the detection module 401 to detect the refrigerant content in one or more of the M outdoor units 101, and can Obtaining a refrigerant content value in the first outdoor unit of the M outdoor units detected by the detecting module 401 and a refrigerant content value in the second outdoor unit.

The control subsystem 1033 may generate a sixth control command when it is determined that the refrigerant content value in the first outdoor unit is less than the refrigerant content value in the second outdoor unit.

The control subsystem 1033 may execute the sixth control instruction to input a second amount of refrigerant to the first outdoor unit by controlling the refrigerant distribution subsystem, and input a third quantity to the second outdoor unit The refrigerant, wherein the second amount is greater than the third amount.

That is, if it is detected that the refrigerant contents in the two or more outdoor units 101 are unbalanced, the refrigerant can be equalized between the two or more outdoor units 101, and the amount of the refrigerant in each of the outdoor units 101 is made as much as possible. The same is to avoid an imbalance in the amount of refrigerant in each of the outdoor units 101.

In the embodiment of the present invention, the outdoor unit 101 and the indoor unit 102 in the same network can be controlled by the control system 103. For example, if there are two indoor units 102 in the network, each indoor unit 102 is 1.5P, and there are two outdoor units 101, one of which is 1.5P, and the other outdoor unit 101 is 3P. If the user chooses to turn on one indoor unit 102, the control system 103 may choose to turn on the 1.5P outdoor unit 101, and the other 3P outdoor unit 101 may not turn on; and if the user chooses to turn on the two indoor units 102, The control system may choose to open the 3P outdoor unit 101, and the other 1.5P outdoor unit 101 may not be turned on, so that energy saving effects can be achieved as much as possible.

Or, for example, if there are three indoor units 102 in the network, the three indoor units are all 1.5P, and there are two outdoor units 101, one of which is 1.5P and the other outdoor unit 101 is 3P. If the user chooses to turn on one indoor unit 102, the control system 103 may choose to turn on the 1.5P outdoor unit 101, and the other 3P outdoor unit 101 may not turn on; and if the user chooses to turn on the two indoor units 102, The control system 103 may select to open the 3P outdoor unit 101, and the other 1.5P outdoor unit 101 may not be turned on; if the user chooses to turn on the three indoor units 102, the control system 103 may open both outdoor units 101. .

Preferably, when there are multiple indoor units 102 and/or multiple outdoor units 101 in the network, which indoor unit 101 is selected as the indoor unit 102 to be turned on for the indoor unit 102 that the user selects to open. Providing a heat source or a cold source, the control system 103 can be determined by a corresponding algorithm, for example, the control system can determine which outdoor units 101 are turned on to be more energy efficient, and can control the opening of the outdoor units 101.

Specifically, the control system 103 can control the respective outdoor unit 101 and/or the indoor unit 102 by controlling the corresponding valves.

The air conditioning system in the embodiment of the present invention includes: M outdoor units 101 for providing a heat source or a cold source, wherein M is a positive integer; N indoor units 102 for receiving by the M outdoor units 101 a heat source or a cold source provided by one or more outdoor units 101; N is a positive integer; the control system 103 includes: a lubricating oil distribution subsystem 1031 connected to each of the M outdoor units 101, wherein The lubricating oil distribution subsystem 1031 includes a gas-liquid separator F1 and an oil separator F2; wherein the gas-liquid separator F1 and the oil separator F2 pass through the first connecting pipe D1 and the second connecting pipe D2 Connected, the first connecting pipe D1 and the second connecting pipe D2 are for transferring refrigerant and oil between the gas-liquid separator F1 and the oil separator F2; the refrigerant distribution subsystem 1032, and the M Each of the outdoor units 101 is connected to the outdoor unit 101; the control subsystem 1033, and each of the M outdoor units 101, the indoor units 102 of the N indoor units 102, and the lubrication The oil distribution subsystem 1031 and the refrigerant distribution subsystem 1032 are connected; wherein, the control subsystem 1033 receives a first control instruction for controlling one or more of the N indoor units 102 The control subsystem 1033 executes the first control instruction, controls the refrigerant distribution subsystem 1032, and outputs a first quantity corresponding to the first control instruction to the one or more indoor units 102. a heat source or a cold source of value, and controlling the lubricating oil distribution subsystem 1031 to make one or more of the M outdoor units 101 corresponding to the one or more indoor units 102 The amount of oil in each of the outdoor units 101 is within a preset amount of oil.

With the technical solution of the embodiment of the present application, at least the following technical effects can be achieved:

1. In the prior art central air conditioner, more pipes are connected between the gas-liquid separator and the oil separator, so that the connection between the gas-liquid separator and the oil separator is complicated, and control is needed during control. There are many components, so there are technical problems of low system reliability and high manufacturing cost. In the embodiment of the present invention, the two-way gas-liquid separator is used, the number of connecting pipes and valves at the bottom of the gas-liquid separator is reduced, the control points and the welding points are reduced, the hardware resources are saved, the cost is reduced, and the system structure is simplified. Reduced maintenance complexity and improved system reliability.

2. The central air conditioner in the prior art can realize heating or cooling of a plurality of indoor units through a plurality of outdoor units assembled together, but does not pass a centralized control among a plurality of sets of central air conditioners. On the platform, multiple sets of central air conditioners are networked and controlled, so they cannot be centrally controlled. In the embodiment of the present invention, a plurality of outdoor units and a plurality of indoor units are networked, and a unified control module is provided, and the control module uniformly controls each outdoor unit or indoor unit in the network, thereby The outdoor unit uniformly distributes the cold source or the heat source as needed, and improves the work efficiency through centralized and unified control.

3. The central air conditioner in the prior art has a plurality of compressors in the outdoor unit, which requires uniform oil control of the lubricating oil in the compressor, but due to the prior art in the oil equalization implementation scheme, The structure of the compressor is more or less modified, or the piping for oil equalization needs to be connected between the compressors, so the implementation is complicated. However, the technical solution in the embodiment of the present invention is realized by the control module when realizing the oil equalization, and no modification is required for the outdoor unit and the indoor unit, and the outdoor unit is The compressor in the process also does not need to be adjusted. Therefore, the technical solution in the present invention can be applied to any air conditioner, and the application range is very wide, and the implementation is convenient, and the operation process is simplified.

4. In the prior art, the split air conditioners that are separately installed and operated cannot be centrally controlled, and each air conditioner needs to be controlled separately, so that each air conditioner may require its own control device, and the required hardware or software resources are compared. More, more waste of resources. In the embodiment of the present invention, a plurality of indoor units and/or outdoor units connected to the network are equipped with a unified control module, and only one control module can be used to control each machine in the network, without requiring more control devices. save resources. At the same time, using a control module for overall control, it is also convenient to allocate resources according to the overall needs, so that resources can be rationalized.

5. In the prior art, each split air conditioner cannot be operated in a network. One outdoor unit can only supply cooling or heating to a fixed corresponding indoor unit. The cold source or heat source cannot be allocated according to the overall needs. In the embodiment of the present invention, a plurality of outdoor units and a plurality of indoor units are networked, and a unified control module is provided, and the control module uniformly controls each outdoor unit or indoor unit in the network, thereby The corresponding indoor unit can select the outdoor unit that matches it, and the cold source or the heat source can be allocated according to the overall needs, and the appropriate outdoor unit can be selected according to the specific power of the corresponding indoor unit, thereby maximizing the power matching. To save energy.

6. In the prior art, since the split air conditioners cannot be operated in a network, if the outdoor unit in a split air conditioner fails, the corresponding indoor unit is in a normal state, but because the corresponding outdoor unit is faulty, Also not available. In the embodiment of the present invention, since the outdoor unit and the plurality of indoor units in the plurality of split air conditioners can be networked, the plurality of machines can be networked, so that if one of the outdoor units is damaged, when the indoor unit needs to be operated, It is also possible to select other outdoor units, so that the corresponding indoor unit cannot be operated because the outdoor unit is damaged, and resources can be utilized to the greatest extent, thereby avoiding waste of resources.

7. In the embodiment of the present invention, since the overall control is performed by using one control module, the control module can determine the amount of oil in each outdoor unit by detecting each outdoor unit, and the amount of oil between the outdoor units. When unbalanced, the control module can control the oil equalization between the outdoor units to avoid damage to the outdoor unit due to excessive oil or less oil. In summary, in the embodiment of the present invention, a plurality of outdoor units and a plurality of indoor units are connected to the control system, that is, a plurality of outdoor units and a plurality of indoor units are networked, thereby being unified by the control system. Control, the control system can control the heat source content, the cold source content or the refrigerant content in the outdoor unit according to the received corresponding control command, thereby correspondingly controlling the parameters of the indoor unit, for example, controlling the wind direction, wind speed, temperature of the indoor unit, The switch machine and the like can realize the control of each outdoor unit or the outdoor unit in the network through a control system, the operation is simple, the operation efficiency is high, and the control system can select the energy saving manner under the same conditions. To make the corresponding outdoor unit or indoor unit work, energy saving effect can be achieved, and the operation process is simplified for the user. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Rights request

1. An air conditioning system, characterized by including:

M outdoor units, used to provide heat or cold sources, where M is a positive integer;

N indoor units, used to receive heat or cold sources provided by one or more of the M outdoor units; N is a positive integer;

Control system, including:

The lubricating oil distribution subsystem is connected to each of the M outdoor units, wherein the lubricating oil distribution subsystem includes a gas-liquid separator and an oil separator; wherein the gas-liquid separator and The oil separator is connected through a first connecting pipe and a second connecting pipe, and the first connecting pipe and the second connecting pipe are used to transmit refrigerant between the gas-liquid separator and the oil separator. Oil;

The refrigerant distribution subsystem is connected to each of the M outdoor units;

A control subsystem connected to each of the M outdoor units, each of the N indoor units, the lubricating oil distribution subsystem and the refrigerant distribution subsystem;

Wherein, when the control subsystem receives the first control instruction for controlling one or more indoor units among the N indoor units, the control subsystem executes the first control instruction, and The refrigerant distribution subsystem controls to output a first amount of heat or cold source corresponding to the first control instruction to the one or more indoor units, and controls the lubricating oil distribution subsystem to make the The oil amount in each of the one or more outdoor units among the M outdoor units corresponding to the one or more indoor units is within a preset oil amount range.

2. The system of claim 1, wherein the gas-liquid separator is a bidirectional gas-liquid separator, one side of the first connecting pipe is connected to the oil separator, and the first connection The other side of the pipe is located inside the gas-liquid separator, one side of the second connecting pipe is connected to the N indoor units, and the other side of the second connecting pipe is located inside the gas-liquid separator. , the shapes of the first connecting pipe and the second connecting pipe inside the gas-liquid separator are both U-shaped.

3. The system of claim 1, wherein the lubricating oil distribution subsystem further includes Including the first valve unit;

The gas-liquid separator is used to separate refrigerant and oil, and transport the separated refrigerant and oil to one or more of the oil separator or the N indoor units through the first connecting pipe. Indoor unit;

The oil separator is used to separate oil and refrigerant;

The first valve unit is used to control the transmission of heat sources or cold sources between the control system and the M outdoor units.

4. The system of claim 1, wherein the refrigerant distribution subsystem includes: a second valve unit for controlling the transmission of refrigerant between the control system and the at least one outdoor unit.

5. The system of claim 1, wherein the air conditioning system further includes: a detection module;

The control subsystem includes: a receiving module, a processing module and a sending module;

Wherein, the receiving module is used to receive the first control instruction;

The processing module is used to execute the first control instruction to control the lubricating oil distribution subsystem and/or the refrigerant distribution subsystem; receive the detection information sent by the detection module through the receiving module, and generate corresponding control instructions according to the detection information;

The sending module is used to send corresponding control instructions to corresponding outdoor units among the M outdoor units.

6. The system of claim 5, wherein the control subsystem further includes an input module, connected to the processing module, for inputting the first control instruction according to the operation input by the user.

7. A control system, characterized in that the control system includes:

casing;

A circuit board, arranged in the casing;

The lubricating oil distribution subsystem is provided on the circuit board and is connected to each of the M outdoor units; wherein the lubricating oil distribution subsystem includes a gas-liquid separator and an oil separator, The gas-liquid separator and the oil separator are connected through a first connecting pipe and a second connecting pipe, and the first connecting pipe and the second connecting pipe are used to connect the gas-liquid separator and the oil separator. Transfer refrigerant and oil between separators;

The refrigerant distribution subsystem is installed on the circuit board and connected to M outdoor units;

A control subsystem is provided on the circuit board and is connected to the N indoor units, the M outdoor units, the lubricating oil distribution subsystem and the refrigerant distribution subsystem;

A power supply device is provided in the casing and used to supply power to the lubricating oil distribution subsystem, the refrigerant distribution subsystem and the control subsystem.

8. The control system according to claim 7, wherein the gas-liquid separator is a bidirectional gas-liquid separator, one side of the first connecting pipe is connected to the oil separator, and the first connecting pipe is connected to the oil separator. The other side of the connecting pipe is located inside the gas-liquid separator, one side of the second connecting pipe is connected to the N indoor units, and the other side of the second connecting pipe is located inside the gas-liquid separator. Internally, the shapes of the first connecting pipe and the second connecting pipe inside the gas-liquid separator are both U-shaped.

9. The control system of claim 7, wherein the lubricating oil distribution subsystem further includes a first valve unit;

The gas-liquid separator is used to separate the refrigerant and oil, and transmit the separated refrigerant and oil to the oil separator or one or more of the N indoor units through the connecting pipes. ;

The oil separator is used to separate oil and refrigerant;

The first valve unit is used to control the transmission of heat source or cold source between the control system and the at least one outdoor unit.

10. The control system according to claim 7, wherein the refrigerant distribution subsystem includes: a second valve unit for controlling the transmission of refrigerant between the control system and the at least one outdoor unit.

11. An air conditioning control method, the method is applied to an air conditioning system, characterized in that the air conditioning system includes M outdoor units, N indoor units and a control system, and the control system includes a lubricating oil distribution subsystem, a refrigerant Distribution subsystem and control subsystem, wherein the lubricating oil distribution subsystem The system includes a gas-liquid separator and an oil separator. The gas-liquid separator and the oil separator are connected through a first connecting pipe and a second connecting pipe. The first connecting pipe and the second connecting pipe are used. Transferring refrigerant and oil between the gas-liquid separator and the oil separator; the method includes the following steps:

receive the first control instruction;

Execute the first control instruction, control the refrigerant distribution subsystem, output a first amount of heat source or cold source corresponding to the first control instruction to the one or more indoor units, and control all indoor units. The lubricating oil distribution subsystem is controlled so that the oil amount in each of the one or more outdoor units among the M outdoor units corresponding to the one or more indoor units is within the preset oil amount range. Inside.

12. The method according to claim 11, characterized in that: executing the first control instruction, controlling the refrigerant distribution subsystem, and outputting the first control instruction to the one or more indoor units. The steps corresponding to the heat source or cold source of the first magnitude include:

Execute the first control instruction, start the detection module in the air conditioning system, and obtain one or more oil quantity values in one or more of the M outdoor units detected by the detection module;

When it is determined that the oil quantity value of P outdoor units among the M outdoor units is greater than the upper limit of the preset oil quantity range, a second control instruction is generated;

The second control instruction is sent to the corresponding P outdoor units to instruct the P outdoor units to reduce the operating frequency, so that the P outdoor units use excess oil that exceeds the preset oil amount range. The amount of oil is output, so that the amount of oil stored in the M outdoor units reaches a balance; where P is an integer that is not less than 0 and less than M.

13. The method of claim 11, characterized in that: executing the first control instruction, controlling the refrigerant distribution subsystem, and outputting the first control instruction to the one or more indoor units. The steps corresponding to the heat source or cold source of the first magnitude include:

Execute the first control instruction and start the detection module in the air conditioning system to obtain one or more oil quantity values in one or more outdoor units among the M outdoor units detected by the detection module; When it is determined that the oil quantity value of P outdoor units among the M outdoor units is less than the lower limit value of the preset oil quantity range, a fourth control instruction is generated;

The fourth control instruction is sent to the corresponding P outdoor units to instruct the P outdoor units to increase the operating frequency, so that the P outdoor units obtain the frequency from the corresponding outdoor units among the M-P outdoor units. lubricating oil, thereby balancing the amount of oil stored in the M outdoor units; where P is an integer that is not less than 0 and less than M.

14. The method according to claim 11, characterized in that after receiving the first control instruction, it further includes the step of:

Execute the first control instruction, start the detection module in the air conditioning system, and obtain the refrigerant content value and the first outdoor unit among the M outdoor units detected by the detection module. 2. The refrigerant content value in the outdoor unit;

When it is determined that the refrigerant content value in the first outdoor unit is less than the refrigerant content value in the second outdoor unit, a sixth control instruction is generated;

The sixth control instruction is executed to input a second amount of refrigerant to the first outdoor unit by controlling the refrigerant distribution subsystem, and to input a third amount of refrigerant to the second outdoor unit, wherein the The second magnitude is greater than the third magnitude.