Multi-split machine heating control method, machine readable storage medium and multi-split machine

Abstract

The invention relates to the technical field of air treatment equipment, in particular to a multi-split machine heating control method, a machine readable storage medium and a multi-split machine. The multi-split air conditioner heating control method comprises the steps that the inlet temperature and the outlet temperature of an indoor unit coil pipe of each started indoor unit are obtained; and according to the inlet temperature and the outlet temperature of each started indoor unit, the opening degree of an indoor unit throttling valve corresponding to each started indoor unit is controlled. According to the invention, the opening degree of the throttle valve of the indoor unit is controlled according to the inlet temperature and the outlet temperature corresponding to each opened indoor unit, which means that the flow of the refrigerant entering the indoor unit is adjusted according to the actual heating effect; therefore, the problems that due to the fact that the fall between the indoor unit and the outdoor unit is large, the refrigerant flow of the corresponding indoor unit is small, and the heating effect is poor can be solved, and each started indoor unit has the reasonable refrigerant flow and the good heating effect. The purpose of improving the user experience is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air handling equipment, and in particular, to a multi-connected unit heating control method, a machine-readable storage medium, and a multi-connected unit. Background Art

[0002] At present, a multi-connected unit air conditioning system includes a plurality of indoor units and at least one outdoor unit. The outdoor unit is installed outdoors, and the indoor units are installed in rooms that need cooling (heating). The outdoor unit and the indoor units are connected through pipelines. Multi-connected units are widely used in commercial buildings such as office buildings and apartments, and can simultaneously meet the heat exchange requirements of multiple indoor places.

[0003] There is an installation height difference between each indoor unit and the outdoor unit. However, usually the installation height differences of each indoor unit are different. This leads to the problem that when multiple indoor units in the multi-connected unit system are simultaneously in the heating operation, the indoor units with a larger height difference from the outdoor unit have a smaller refrigerant flow rate and a poor heating effect, thus affecting the user experience. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide a multi-connected unit heating control method, a machine-readable storage medium, and a multi-connected unit that overcome or at least partially solve the above problems, aiming to solve the problem that the indoor units with a larger height difference from the outdoor unit in the existing multi-connected units have a smaller refrigerant flow rate and a poor heating effect, so as to achieve the purpose of improving the user experience.

[0005] On the one hand, the present invention provides a multi-connected unit heating control method, including:

[0006] Obtaining the inlet temperature and the outlet temperature of the indoor unit coil of each turned-on indoor unit;

[0007] Controlling the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the inlet temperature and the outlet temperature of each turned-on indoor unit.

[0008] Optionally, the controlling the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the inlet temperature and the outlet temperature of each turned-on indoor unit includes:

[0009] Obtaining the temperature difference between the inlet temperature and the outlet temperature of each turned-on indoor unit;

[0010] Controlling the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the temperature difference of each turned-on indoor unit.

[0011] Optionally, the controlling the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the temperature difference of each turned-on indoor unit includes:

[0012] Determine whether the temperature difference is greater than a preset difference;

[0013] If not, increase the opening degree of the corresponding indoor throttle valve.

[0014] Optionally, after increasing the opening degree of the corresponding indoor throttle valve, it further includes:

[0015] When the opening degree of the indoor throttle valve increases to the maximum preset opening degree, if the temperature difference is still not greater than the preset difference, increase the rotational speed of the corresponding outdoor fan.

[0016] Optionally, increasing the opening degree of the corresponding indoor throttle valve includes: gradually increasing the opening degree of the corresponding indoor throttle valve until the temperature difference is greater than the preset difference, and then stopping increasing the opening degree of the corresponding indoor throttle valve; and / or

[0017] After increasing the rotational speed of the corresponding outdoor fan, it further includes: if the temperature difference is greater than the preset difference, stop increasing the rotational speed of the corresponding outdoor fan.

[0018] Optionally, the multi-connected unit heating control method further includes:

[0019] Obtain the indoor ambient temperature, the outdoor ambient temperature, and the user-set temperature;

[0020] According to the indoor ambient temperature, the outdoor ambient temperature, and the user-set temperature, obtain the preset difference.

[0021] Optionally, increasing the opening degree of the corresponding indoor throttle valve includes:

[0022] Calculate the opening degree of the indoor throttle valve according to the following formula and denote it as the first opening degree:

[0023] n = K1△TC;

[0024] Control the indoor throttle valve to execute the first opening degree;

[0025] where n is the opening degree of the indoor throttle valve;

[0026] K1 is the valve opening coefficient,

[0027] △TC is the temperature difference;

[0028] K1 is negatively correlated with △TC.

[0029] Optionally, increasing the rotational speed of the corresponding outdoor fan includes:

[0030] Calculate the rotational speed of the outdoor fan according to the following formula and denote it as the first rotational speed:

[0031] R = K2△TC;

[0032] Control the outdoor fan to execute the first rotation speed;

[0033] wherein, R is the rotation speed of the outdoor fan;

[0034] K2 is the speed coefficient,

[0035] △TC is the temperature difference;

[0036] K2 is negatively correlated with △TC.

[0037] On the other hand, the present invention also provides a machine-readable storage medium, on which a machine-executable program is stored. When the machine-executable program is executed by a processor, the multi-connected unit heating control method described in any one of the above is implemented.

[0038] On yet another aspect, the present invention also provides a multi-connected unit, including a controller. The controller includes a memory, a processor, and a machine-executable program stored on the memory and running on the processor. When the processor executes the machine-executable program, the multi-connected unit heating control method described in any one of the above is implemented.

[0039] In the multi-connected unit heating control method, machine-readable storage medium, and multi-connected unit of the present invention, the heat exchange effect of the indoor heat exchanger of each turned-on indoor unit is characterized by the inlet temperature and outlet temperature of the indoor unit coil of each turned-on indoor unit. The present invention controls the opening degree of the indoor throttle valve according to the inlet temperature and outlet temperature corresponding to each turned-on indoor unit, which is equivalent to adjusting the refrigerant flow rate entering the indoor unit according to the actual heating effect, thereby overcoming the problem that the refrigerant flow rate of the corresponding indoor unit is small and the heating effect is poor due to the large height difference between the indoor unit and the outdoor unit, so that each turned-on indoor unit has a reasonable refrigerant flow rate and a good heating effect. The present invention achieves the purpose of improving the user experience.

[0040] In addition, the control method of the present invention has the beneficial effect of simple and easy-to-execute control program.

[0041] Therefore, according to the following detailed description of the specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will more clearly understand the above and other objects, advantages, and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0043] Figure 1 is a schematic flow chart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0044] Figure 2 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0045] Figure 3 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0046] Figure 4 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0047] Figure 5 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0048] Figure 6 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0049] Figure 7 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0050] Figure 8 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention;

[0051] Figure 9 is a schematic structural diagram of a machine-readable storage medium according to an embodiment of the present invention;

[0052] Figure 10 is a schematic structural diagram of a multi-connected unit according to an embodiment of the present invention. Detailed Embodiments

[0053] The following refers to Figures 1 to 10 to describe the multi-connected unit heating control method, machine-readable storage medium, and multi-connected unit of the embodiments of the present invention. Among them, the orientation or positional relationship indicated by "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", "lateral", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0054] The terms "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include at least one such feature, that is, one or more such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. When a feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0055] Unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0056] Figure 1 is a schematic flowchart of a multi-connected unit heating control method according to an embodiment of the present invention, and in combination with Figures 2 - 8 , the present invention provides a multi-connected unit heating control method.

[0057] A multi-connected unit heating control method includes the following steps:

[0058] S100, obtaining the inlet temperature and the outlet temperature of the indoor unit coil of each turned-on indoor unit 120;

[0059] S200, controlling the opening degree of the indoor unit throttle valve corresponding to each turned-on indoor unit 120 according to the inlet temperature and the outlet temperature of each turned-on indoor unit 120.

[0060] Specifically, the multi-connected unit 100 includes one or more groups of indoor units 120 and at least one outdoor unit 110. Each group of indoor units includes a plurality of indoor units 120, and each group of indoor units 120 corresponds to one outdoor unit 110. That is to say, the multi-connected unit 100 may include one group of indoor units 120 and one outdoor unit 110; it may also include multiple groups of indoor units 120 and multiple outdoor units 110.

[0061] An indoor unit throttle valve is provided between each turned-on indoor unit 120 and the corresponding outdoor unit 110. The indoor unit throttle valve may be an electronic expansion valve. The indoor unit throttle valve can be used to adjust the refrigerant flow rate entering each turned-on indoor unit 120, thereby adjusting the heating effect of each turned-on indoor unit 120.

[0062] In this embodiment, the heat exchange effect of the indoor heat exchanger of each turned-on indoor unit 120 is characterized by the inlet temperature and the outlet temperature of the indoor unit coil of each turned-on indoor unit 120. In this embodiment, the opening degree of the indoor unit throttle valve is controlled according to the inlet temperature and the outlet temperature corresponding to each turned-on indoor unit 120, which is equivalent to adjusting the refrigerant flow rate entering the indoor unit according to the actual heating effect, so as to overcome the problem that the refrigerant flow rate of the corresponding indoor unit is small and the heating effect is poor due to the large height difference between the indoor unit 120 and the outdoor unit 110, so that each turned-on indoor unit has a reasonable refrigerant flow rate and a good heating effect. This embodiment achieves the purpose of improving the user experience.

[0063] In addition, the control method of the present invention has the beneficial effect that the control program is simple and easy to execute.

[0064] As Figure 2 shown, in some alternative embodiments of the present invention, S200, controlling the opening degree of the indoor unit throttle valve corresponding to each turned-on indoor unit according to the inlet temperature and the outlet temperature of each turned-on indoor unit, includes the following steps:

[0065] S201, obtaining the temperature difference between the inlet temperature and the outlet temperature of each turned-on indoor unit 120;

[0066] S202, controlling the opening degree of the indoor unit throttle valve of each turned-on indoor unit 120 according to the temperature difference of each turned-on indoor unit 120.

[0067] Specifically, the inlet temperature is denoted as TC1, the outlet temperature is denoted as TC2, the temperature difference is denoted as △TC, and △TC = TC1 - TC2.

[0068] In this embodiment, the temperature difference between the inlet temperature and the outlet temperature of the indoor unit coil of each turned-on indoor unit can directly characterize the heat exchange effect of the indoor heat exchanger. In this embodiment, the opening degree of the indoor unit throttle valve is controlled according to the temperature difference between the inlet temperature and the outlet temperature, so as to improve the control efficiency.

[0069] In some alternative embodiments of the present invention, S200, controlling the opening degree of the indoor unit throttle valve corresponding to each turned-on indoor unit according to the inlet temperature and the outlet temperature of each turned-on indoor unit, includes the following steps:

[0070] Obtaining the ratio of the inlet temperature and the outlet temperature of each turned-on indoor unit 120;

[0071] Controlling the opening degree of the indoor unit throttle valve of each turned-on indoor unit 120 according to the ratio.

[0072] As Figure 3As shown, in some alternative embodiments of the present invention, in S202, controlling the opening degree of the indoor unit throttle valve corresponding to each turned-on indoor unit according to the temperature difference of each turned-on indoor unit may include the following steps:

[0073] S2021, determine whether the temperature difference is greater than a preset difference; if so, execute step S2022; if not, execute step S2023;

[0074] S2022, control the normal operation of indoor unit 120; specifically, maintain the current opening degree of the indoor unit throttle valve;

[0075] S2023, increase the opening degree of the corresponding indoor unit throttle valve.

[0076] Specifically, in step S2021, the preset difference refers to the target difference between the inlet temperature and the outlet temperature of the indoor unit coil.

[0077] This embodiment provides a specific method for controlling the opening degree of the indoor unit throttle valve according to the temperature difference between the inlet temperature and the outlet temperature of the indoor unit coil. Specifically, when the temperature difference between the inlet temperature and the outlet temperature of the indoor unit coil is not greater than the preset difference, it indicates that the heat exchange effect of the indoor heat exchanger corresponding to this indoor unit is poor at this time. Therefore, by increasing the opening degree of the throttle valve, the refrigerant flow rate entering this indoor unit can be increased, thereby improving the heat exchange effect of this indoor heat exchanger. When the temperature difference between the inlet temperature and the outlet temperature of the indoor unit coil is greater than the preset difference, it indicates that the heat exchange effect of the indoor heat exchanger corresponding to this indoor unit is good at this time. Therefore, control the normal operation of the indoor unit and maintain the current opening degree of the indoor unit throttle valve.

[0078] As Figure 4 shown, in some alternative embodiments of the present invention, after increasing the opening degree of the corresponding indoor unit throttle valve (S2023), the multi-split heating control method further includes the following steps:

[0079] S300, when the opening degree of the indoor unit throttle valve increases to the maximum preset opening degree, if the temperature difference is still not greater than the preset difference, increase the rotational speed of the corresponding outdoor fan.

[0080] In this embodiment, when the opening degree of the indoor unit throttle valve increases to the maximum preset opening degree, if the temperature difference is still not greater than the preset difference, it indicates that improving the heating effect of the indoor unit by only increasing the opening degree of the indoor unit throttle valve cannot meet the requirements. At this time, the heating effect of the indoor unit can be further improved by increasing the rotational speed of the corresponding outdoor fan. Therefore, through the above method in this embodiment, the heating effect of the corresponding indoor unit can be effectively improved.

[0081] In addition, in this embodiment, when improving the heating effect of the indoor unit, the throttle valve opening of the indoor unit is increased first, which can avoid the impact of increasing the outdoor unit speed on other indoor units as much as possible.

[0082] In some optional embodiments of the present invention, S2023, the increasing of the opening of the corresponding indoor throttle valve includes the following steps: gradually increasing the opening of the corresponding indoor throttle valve until the temperature difference is greater than the preset difference, and then stopping increasing the opening of the corresponding indoor throttle valve.

[0083] Specifically, in the process of increasing the opening of the corresponding indoor throttle valve, the step of determining whether the temperature difference is greater than the preset difference (S2021) is performed once every first preset time period. When the temperature difference is greater than the preset difference, the current opening of the indoor throttle valve is maintained.

[0084] In some optional embodiments of the present invention, increasing the opening of the corresponding indoor engine throttle valve in step S2023 includes the following steps: increasing the opening of the indoor engine throttle valve to a second opening. The second opening is greater than the current opening. Furthermore, the second opening may be a maximum preset opening value.

[0085] like Figure 5 As shown, in some optional embodiments of the present invention, the multi-unit heat control method further includes the following steps:

[0086] S400, obtaining the indoor ambient temperature, the outdoor ambient temperature, and the user-set temperature;

[0087] S500: Obtain a preset difference based on the indoor ambient temperature, the outdoor ambient temperature, and the user-set temperature.

[0088] In this embodiment, the preset differential is a program-set temperature difference, which is set based on the indoor ambient temperature, the outdoor ambient temperature, and the user-set temperature. It is a floating value. Because the preset differential is a floating value, the opening of the indoor unit's throttle valve can be controlled more accurately.

[0089] In some optional embodiments of the present invention, S300, the step of increasing the rotation speed of the corresponding outdoor fan, further includes: if the temperature difference is greater than the preset difference, stopping increasing the rotation speed of the corresponding outdoor fan and controlling the indoor unit to operate normally.

[0090] like Figure 6 As shown, in some optional embodiments of the present invention, S2023, increasing the opening of the corresponding internal machine throttle valve includes the following steps:

[0091] S601: Calculate the opening of the indoor unit throttle valve according to the following formula and record it as the first opening:

[0092] n=K1△TC;

[0093] S602, control the indoor throttle valve to execute a first opening degree.

[0094] Wherein, n is the opening degree of the indoor throttle valve; K1 is the valve opening coefficient, and △TC is the temperature difference; K1 is negatively correlated with △TC. Specifically, K1 changes with the change of △TC; the smaller △TC is, the larger K1 is; the value of K1 is a dynamic variable set according to △TC.

[0095] This embodiment provides a specific method for increasing the opening degree of the corresponding indoor throttle valve. By using the above method, the opening degree of the indoor throttle valve can be accurately and quickly adjusted.

[0096] Such as Figure 7 shown, in some alternative embodiments of the present invention, S300, increasing the rotational speed of the corresponding outdoor fan includes the following steps:

[0097] S301, calculate the rotational speed of the outdoor fan according to the following formula and record it as the first rotational speed:

[0098] R = K2△TC;

[0099] S302, control the outdoor fan to execute the first rotational speed;

[0100] Wherein, R is the rotational speed of the outdoor fan; K2 is the rotational speed coefficient, and △TC is the temperature difference; K2 is negatively correlated with △TC. Specifically, K2 changes with the change of △TC; the smaller △TC is, the larger K2 is; the value of K2 is a dynamic variable set according to △TC.

[0101] This embodiment provides a specific method for increasing the rotational speed of the corresponding outdoor fan. By using the above method, the rotational speed of the outdoor fan can be accurately and quickly adjusted.

[0102] In some alternative embodiments of the present invention, increasing the rotational speed of the corresponding outdoor fan includes the following steps: increasing the rotational speed of the corresponding outdoor fan to a second rotational speed. Wherein, the second rotational speed is greater than the current rotational speed.

[0103] Further, the second rotational speed is the maximum rotational speed.

[0104] In some alternative embodiments of the present invention, the multi - split heating control method further includes the following steps:

[0105] In response to the heating start signal, control the multi - split to start the heating mode;

[0106] After a preset time, execute the step of obtaining the inlet temperature and outlet temperature of the indoor coil of each turned - on indoor unit.

[0107] As shown in 8, in some alternative embodiments of the present invention, the multi - split heating control method includes the following steps:

[0108] S1. In response to the heating start signal, control the multi-connected unit to start the heating mode; after a preset time, execute S2;

[0109] S2. Obtain the inlet temperature and outlet temperature of the indoor unit coil of each turned-on indoor unit 120;

[0110] S3. Obtain the temperature difference between the inlet temperature and the outlet temperature of each turned-on indoor unit 120;

[0111] S4. Determine whether the temperature difference is greater than the preset difference; if so, execute S5; if not, execute S6;

[0112] S5. Maintain the current opening degree of the indoor unit throttle valve;

[0113] S6. Increase the opening degree of the corresponding indoor unit throttle valve; after S6, execute S4 once every first preset time period; when the opening degree of the indoor unit throttle valve increases to the maximum preset opening degree, execute S7;

[0114] S7. Determine whether the temperature difference is greater than the preset difference; if so, execute S8; if not, execute S9;

[0115] S8. Maintain the current rotational speed of the outdoor fan;

[0116] S9. Increase the rotational speed of the corresponding outdoor fan; after S9, execute S7 once every second preset time period.

[0117] In this embodiment, it is preferred to improve the heating effect of the indoor unit by increasing the opening degree of the indoor unit throttle valve. When the opening degree of the indoor unit throttle valve increases to the maximum preset opening degree, if the temperature difference is still not greater than the preset difference, it indicates that improving the heating effect of the indoor unit by only increasing the opening degree of the indoor unit throttle valve cannot meet the requirements. At this time, the heating effect of the indoor unit can be further improved by increasing the rotational speed of the corresponding outdoor fan. Therefore, through the above method, this embodiment can effectively improve the heating effect of the corresponding indoor unit.

[0118] Figure 9 It is a schematic diagram of a machine-readable storage medium 200 according to an embodiment of the present invention. As Figure 9 shown, an embodiment of the present invention further provides a machine-readable storage medium 200, on which a machine-executable program 201 is stored. When the machine-executable program 201 is executed by a processor 132, it implements the multi-connected unit heating control method according to any one of the above embodiments.

[0119] It should be noted that the logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any machine-readable storage medium 200 for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor 132, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in combination with these instruction execution systems, apparatus, or devices.

[0120] For the description of this embodiment, the machine-readable storage medium 200 can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device or in combination with these instruction execution systems, apparatus, or devices. More specific examples (non-exhaustive list) of the machine-readable storage medium 200 include the following: an electrical connection part (electronic device) having one or more wirings, a portable computer disk cartridge (magnetic device), a random access memory 131 (RAM), a read-only memory 131 (ROM), an erasable programmable read-only memory 131 (EPROM or flash memory 131), an optical fiber device, and a portable compact disc read-only memory 131 (CDROM). Additionally, the machine-readable storage medium 200 can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing when necessary, and then stored in the memory 131.

[0121] Figure 10 is a schematic diagram of a multi-connected air conditioner 100 according to an embodiment of the present invention, as Figure 10 shown, an embodiment of the present invention further provides a multi-connected air conditioner 100, and the multi-connected air conditioner 100 includes a controller 130. The controller 130 includes a memory 131, a processor 132, and a machine-executable program 201 stored on the memory 131 and running on the processor 132. When the processor 132 executes the machine-executable program 201, it implements the multi-connected air conditioner heating control method according to any one of the above embodiments.

[0122] Specifically, the controller 130 can include a processor 132 adapted to execute stored instructions and a memory 131 that provides temporary storage space for the operation of the instructions during operation. The processor 132 can be a single-core processor 132, a multi-core processor 132, a computing cluster, or any other number of other configurations. The memory 131 can include a random access memory 131 (RAM), a read-only memory 131, a flash memory, or any other suitable storage system.

[0123] The processor 132 can be connected through a system interconnection (such as PCI, PCI-Express, etc.) to an I / O interface (input / output interface) suitable for connecting the multi-connected unit 100 to one or more I / O devices (input / output devices). The I / O devices can include, for example, a keyboard and a pointing device, where the pointing device can include a touchpad or a touch screen, etc.

[0124] The processor 132 can also be linked through the system interconnection to a display interface suitable for connecting the controller 130 to a display device. The display device can include a display screen as a built-in component of the controller 130. The display device can also include a computer monitor, a television, a projector, etc. externally connected to the multi-connected unit 100. In addition, a network interface controller (NIC) can be suitable for connecting the controller 130 to a network through the system interconnection. In some embodiments, the NIC can use any suitable interface or protocol (such as Internet Small Computer System Interface, etc.) to transmit data. The network can be a cellular network, a radio network, a wide area network (WAN), a local area network (LAN), or the Internet, etc. The remote device can be connected to the controller 130 through the network.

[0125] The flowchart provided in this embodiment is not intended to indicate that the operations of the method will be executed in any specific order, or that all operations of the method are included in every case. In addition, the method can include additional operations. Within the scope of the technical concept provided by the method in this embodiment, additional changes can be made to the above method.

[0126] There are multiple exemplary embodiments of the present invention. However, without departing from the spirit and scope of the present invention, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A multi-connected unit heat control method, characterized in that, Including: Obtain the inlet temperature and outlet temperature of the indoor unit coil of each turned-on indoor unit; Control the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the inlet temperature and the outlet temperature of each turned-on indoor unit.

2. The multi-connected unit heating control method according to claim 1, wherein The step of controlling the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the inlet temperature and the outlet temperature of each turned-on indoor unit includes: Obtain the temperature difference between the inlet temperature and the outlet temperature of each turned-on indoor unit; Control the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the temperature difference of each turned-on indoor unit.

3. The multi-connected unit heating control method according to claim 2, wherein The step of controlling the opening degree of the indoor throttle valve corresponding to each turned-on indoor unit according to the temperature difference of each turned-on indoor unit includes: Judge whether the temperature difference is greater than a preset difference; If not, increase the opening degree of the corresponding indoor throttle valve.

4. The multi-connected unit heating control method according to claim 3, wherein After the step of increasing the opening degree of the corresponding indoor throttle valve, it further includes: When the opening degree of the indoor throttle valve increases to the maximum preset opening degree, if the temperature difference is still not greater than the preset difference, increase the rotation speed of the corresponding outdoor fan.

5. The multi-connected unit heating control method according to claim 4, wherein The step of increasing the opening degree of the corresponding indoor throttle valve includes: gradually increasing the opening degree of the corresponding indoor throttle valve until the temperature difference is greater than the preset difference, and then stop increasing the opening degree of the corresponding indoor throttle valve; and / or After the step of increasing the rotation speed of the corresponding outdoor fan, it further includes: if the temperature difference is greater than the preset difference, stop increasing the rotation speed of the corresponding outdoor fan.

6. The multi-unit air conditioner heating control method according to claim 3, characterized in that, It further includes: Obtain the indoor ambient temperature, outdoor ambient temperature and user-set temperature; Obtain a preset difference according to the indoor ambient temperature, the outdoor ambient temperature and the user-set temperature.

7. The multi-connected unit heating control method according to claim 3, wherein The step of increasing the opening degree of the corresponding indoor throttle valve includes: Calculate the opening degree of the indoor throttle valve according to the following formula and denote it as the first opening degree: n = K1△TC; Control the indoor throttle valve to execute the first opening degree; Wherein, n is the opening degree of the indoor throttle valve; K1 is the valve opening coefficient, △TC is the temperature difference; K1 is negatively correlated with △TC.

8. The multi-connected unit heating control method according to claim 4, wherein The step of increasing the rotation speed of the corresponding outdoor fan includes: Calculate the rotation speed of the outdoor fan according to the following formula and denote it as the first rotation speed: R = K2△TC; Control the outdoor fan to execute the first rotation speed; Wherein, R is the rotation speed of the outdoor fan; K2 is the rotation speed coefficient, △TC is the temperature difference; K2 is negatively correlated with △TC.

9. A machine-readable storage medium, characterized in that, It stores a machine-executable program, and when the machine-executable program is executed by a processor, it implements the multi-connected unit heating control method according to any one of claims 1 to 8.

10. A multi-connected air conditioner, characterized in that, It includes a controller, the controller includes a memory, a processor, and a machine-executable program stored on the memory and running on the processor, and when the processor executes the machine-executable program, it implements the multi-connected unit heating control method according to any one of claims 1 to 8.

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