Air conditioning control module, air conditioning system and control method

Abstract

This application relates to an air conditioning control module, an air conditioning system, and a control method. The air conditioning control module is connected to both an indoor unit module and an outdoor unit module. The air conditioning control module includes a main circuit unit and a circulation unit. The main circuit unit is connected between the indoor unit module and the outdoor unit module, and the circulation unit is connected between the liquid pipe and the gas pipe of the outdoor unit module. Specifically: the main circuit unit is used to disconnect the connection between the indoor unit module and the outdoor unit module when the indoor unit module stops in heating mode; the circulation unit is used to maintain the connection between the liquid pipe and the gas pipe of the outdoor unit module. By disconnecting the connection between the indoor unit module and the outdoor unit module when the indoor unit module stops, the main circuit unit prevents refrigerant from entering the indoor unit module and causing heat loss. Simultaneously, by maintaining the connection between the liquid pipe and the gas pipe of the outdoor unit module through the circulation unit, the refrigerant in the pipes continues to circulate, preventing refrigerant accumulation and thus avoiding heat loss.

Description

Technical Field

[0001] This application relates to the field of air conditioning control, and in particular to an air conditioning regulating module, an air conditioning system and a control method. Background Technology

[0002] In heating mode, the indoor unit's heat exchanger is connected to the high-pressure side. To avoid refrigerant buildup and reduced refrigerant circulation when the indoor unit stops, existing air conditioners keep the throttling device of the indoor unit open to a certain degree when the indoor unit stops to prevent refrigerant buildup. However, the refrigerant will consume some heat when flowing through the stopped indoor unit, resulting in a loss of system heat. Summary of the Invention

[0003] This application provides an air conditioning regulation module, an air conditioning system, and a control method, aiming to solve the technical problem in the prior art that the accumulation of refrigerant in the indoor unit during shutdown may not be avoided, leading to heat loss in the system.

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this application provides an air conditioning control module, which is connected to both an indoor unit module and an outdoor unit module. The air conditioning control module includes a main circuit unit and a circulation unit. The main circuit unit is connected between the indoor unit module and the outdoor unit module, and the circulation unit is connected between the liquid pipe and the gas pipe of the outdoor unit module. Wherein:

[0005] The main circuit unit is used to disconnect the connection between the indoor unit module and the outdoor unit module when the indoor unit module stops in heating mode;

[0006] The circulation unit is used to maintain the connection between the liquid pipe and the gas pipe of the outdoor unit module.

[0007] Optionally, the main circuit unit includes a first control valve and a second control valve; wherein:

[0008] The first control valve is connected between the gas pipe of the indoor unit module and the gas pipe of the outdoor unit module, and the second control valve is connected between the liquid pipe of the indoor unit module and the liquid pipe of the outdoor unit module.

[0009] Optionally, the main circuit unit further includes a first heat exchanger and a third control valve; wherein:

[0010] The first gas end of the first heat exchanger is connected to the gas pipe of the outdoor unit module, the second gas end of the first heat exchanger is connected to the gas pipe of the indoor unit module through the third control valve, and the liquid refrigerant passage of the first heat exchanger is connected between the second control valve and the liquid pipe of the outdoor unit module.

[0011] Optionally, the main circuit unit further includes a first unloading valve and a second unloading valve; wherein:

[0012] The first unloading valve is connected between the gas pipe of the indoor unit module and the gas pipe of the outdoor unit module, and the second unloading valve is connected between the liquid pipe of the indoor unit module and the liquid pipe of the outdoor unit module.

[0013] Optionally, the circulation unit includes a first throttling component; wherein:

[0014] The first throttling component is connected between the liquid pipe and the gas pipe of the outdoor unit module.

[0015] To achieve the above objectives, this application also provides an air conditioning system, characterized in that the air conditioning system includes an outdoor unit module, multiple indoor unit modules, and multiple air conditioning adjustment modules as described above, wherein the indoor unit modules and the air conditioning adjustment modules are connected in a one-to-one correspondence.

[0016] To achieve the above objectives, this application also provides an air conditioning control module method, which is applied to the air conditioning system described above, and includes:

[0017] Obtain the current operating mode of the air conditioning system and the operating status of each indoor unit module;

[0018] If an indoor unit module is in a stopped state, the connection between the liquid pipe and the gas pipe of the outdoor unit module is maintained through the circulation unit.

[0019] If the current operating mode is heating mode, then for each indoor unit module, determine whether the operating status of the indoor unit module is off.

[0020] If the indoor unit module is in a stopped state, the main control unit disconnects the connection between the indoor unit module and the outdoor unit module. The main control unit is the air conditioning control module corresponding to the indoor unit module.

[0021] Optionally, the step of maintaining the connection between the liquid pipe and the gas pipe of the outdoor unit module through the circulation unit includes:

[0022] Determine whether the indoor unit module whose operating status is "stopped" is a terminal indoor unit module;

[0023] If the indoor unit module in the shutdown state is a terminal indoor unit module, then the terminal circulation unit is controlled to connect the liquid pipe and gas pipe of the outdoor unit module. The terminal circulation unit belongs to the air conditioning regulation module corresponding to the terminal indoor unit module.

[0024] Optionally, after the step of obtaining the current operating mode of the air conditioning system and the operating status of each indoor unit module, the following is included:

[0025] If the current operating mode is cooling mode, then for each indoor unit module, determine whether the evaporation of the indoor unit module is incomplete;

[0026] If the indoor unit module does not evaporate completely, the target heat exchanger is controlled to evaporate and exchange heat with the refrigerant output by the indoor unit module before outputting it to the outdoor unit module. The target heat exchanger is the first heat exchanger in the air conditioning regulation module corresponding to the indoor unit module.

[0027] Optionally, the step of determining whether the indoor unit module has incomplete evaporation includes:

[0028] Obtain the outlet and inlet temperatures of the second heat exchanger, wherein the second heat exchanger is the heat exchanger in the indoor unit module;

[0029] The temperature difference is obtained by calculating the difference between the outlet temperature and the inlet temperature.

[0030] If the temperature difference is less than a preset difference, the indoor unit module will not evaporate completely.

[0031] This application discloses an air conditioning regulating module, an air conditioning system, and a control method. The air conditioning regulating module is connected to both an indoor unit module and an outdoor unit module. The air conditioning regulating module includes a main circuit unit and a circulation unit. The main circuit unit is connected between the indoor unit module and the outdoor unit module, and the circulation unit is connected between the liquid pipe and the gas pipe of the outdoor unit module. Specifically: the main circuit unit is used to disconnect the connection between the indoor unit module and the outdoor unit module when the indoor unit module stops in heating mode; the circulation unit is used to maintain the connection between the liquid pipe and the gas pipe of the outdoor unit module. By disconnecting the connection between the indoor unit module and the outdoor unit module when the indoor unit module stops, the main circuit unit prevents refrigerant from entering the indoor unit module and causing heat loss. Simultaneously, by maintaining the connection between the liquid pipe and the gas pipe of the outdoor unit module through the circulation unit, the refrigerant in the pipes continues to circulate, preventing refrigerant accumulation and thus avoiding heat loss. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a module structure diagram of the air conditioning control module of this application;

[0035] Figure 2 This is a detailed structural diagram of the air conditioning control module of this application;

[0036] Figure 3 This is a system state diagram of the air conditioning system in heating mode according to this application;

[0037] Figure 4 This is a system state diagram of the air conditioning system in cooling mode according to this application;

[0038] Figure 5 This is a flowchart illustrating the air conditioning regulation module control method of this application;

[0039] Figure 6 This is a schematic diagram of the module structure of the electronic device of this application.

[0040] Explanation of icon numbers:

[0041] 100 Air conditioning control module C1~C3 First to third control valves 110 Main road unit U1~~U2 First and second unloading valves 120 Loop Unit S1~S2 First and second throttling components 200 Indoor unit module T1 First heat exchanger 300 Outdoor unit module T3 Third heat exchanger 310 compressor 330 gas-liquid separator 320 Four-way valve Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. To enable those skilled in the art to better understand the solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0043] This application provides an air conditioning control module 100, with reference to... Figure 1 , Figure 1 This is a structural diagram of the air conditioning control module 100 of this application. The air conditioning control module 100 is connected to the indoor unit module 200 and the outdoor unit module 300 respectively. The air conditioning control module 100 includes a main circuit unit 110 and a circulation unit 120. The main circuit unit 110 is connected between the indoor unit module 200 and the outdoor unit module 300, and the circulation unit 120 is connected between the liquid pipe and the gas pipe of the outdoor unit module 300.

[0044] The main circuit unit 110 is used to disconnect the connection between the indoor unit module 200 and the outdoor unit module 300 when the indoor unit module 200 stops in heating mode.

[0045] The circulation unit 120 is used to maintain the connection between the liquid pipe and the gas pipe of the outdoor unit module 300.

[0046] The specific structures of the outdoor unit module 300 and the indoor unit module 200 can be configured according to actual needs, as shown in the following reference. Figure 2 The outdoor unit module 300 includes a compressor 310, a four-way valve 320, a third heat exchanger T3, a second throttling component S2, and a gas-liquid separator 330. The exhaust port of the compressor 310 is connected to the first port of the four-way valve 320, the second port of the four-way valve 320 is connected to the gas pipe, the third port of the four-way valve 320 is connected to the air inlet of the compressor 310 through the gas-liquid separator 330, and the fourth port of the four-way valve 320 is connected to the liquid pipe through the third heat exchanger T3 and the second throttling component S2 in sequence.

[0047] The indoor unit module 200 includes a second heat exchanger (not shown), and the two ports of the second heat exchanger are connected to the gas pipe and the liquid pipe through the main circuit unit 110, respectively.

[0048] See Figure 3 In heating mode, the third heat exchanger T3 acts as an evaporator and the second heat exchanger acts as a condenser; the refrigerant output from the exhaust port of the compressor 310 enters the gas pipe through the four-way valve 320.

[0049] At this time, if the indoor unit module 200 is turned on, the main circuit unit 110 connects the indoor unit module 200 and the outdoor unit module 300. The refrigerant in the gas pipe enters the second heat exchanger for heat exchange and is then transferred to the liquid pipe through the main circuit unit 110. The refrigerant in the liquid pipe enters the third heat exchanger T3 through the second throttling component S2 for heat exchange and then enters the gas-liquid separator 330 through the four-way valve 320. The gas-liquid separator 330 outputs refrigerant to the air inlet of the compressor 310.

[0050] If the indoor unit module 200 stops, the main circuit unit 110 disconnects the connection between the indoor unit module 200 and the outdoor unit module 300. The refrigerant in the gas pipe will not enter the stopped indoor unit module 200, thus preventing heat loss to the system. However, in this case, the gas and liquid pipes of the branch circuit connected to the indoor unit module 200 cannot form a circulation. Therefore, the refrigerant in the main circuit gas and liquid pipes will enter the gas and liquid pipes of the branch circuits, causing refrigerant accumulation. In this embodiment, a circulation unit 120 is added to connect the gas and liquid pipes of the branch circuits, allowing the gas and liquid pipes of the branch circuits to enter the main circuit circulation, thereby avoiding refrigerant accumulation.

[0051] In this embodiment, when the indoor unit module 200 is shut down, the main circuit unit 110 disconnects the connection between the indoor unit module 200 and the outdoor unit module 300, thereby preventing refrigerant from entering the indoor unit module 200 and causing heat loss. At the same time, the circulation unit 120 maintains the connection between the liquid pipe and the gas pipe of the outdoor unit module 300, so that the refrigerant in the pipe keeps circulating, avoiding refrigerant accumulation. By solving the problem of refrigerant accumulation, heat loss is avoided.

[0052] Further, see Figure 2 The main circuit unit 110 includes a first control valve C1 and a second control valve C2; ​​wherein:

[0053] The first control valve C1 is connected between the gas pipe of the indoor unit module 200 and the gas pipe of the outdoor unit module 300, and the second control valve C2 is connected between the liquid pipe of the indoor unit module 200 and the liquid pipe of the outdoor unit module 300.

[0054] When the first control valve C1 is opened, refrigerant can be transferred between the gas pipe of the indoor unit module 200 and the gas pipe of the outdoor unit module 300. When the second control valve C2 is opened, refrigerant can be transferred between the liquid pipe of the indoor unit module 200 and the liquid pipe of the outdoor unit module 300.

[0055] If the indoor unit module 200 is turned on, the first control valve C1 and the second control valve C2 are opened; if the indoor unit module 200 is turned off, the first control valve C1 and the second control valve C2 are closed.

[0056] Furthermore, the main circuit unit 110 also includes a first heat exchanger T1 and a third control valve C3; wherein:

[0057] The first gas end of the first heat exchanger T1 is connected to the gas pipe of the outdoor unit module 300, the second gas end of the first heat exchanger T1 is connected to the gas pipe of the indoor unit module 200 through the third control valve C3, and the liquid refrigerant passage of the first heat exchanger T1 is connected between the second control valve C2 and the liquid pipe of the outdoor unit module 300.

[0058] See Figure 4 In cooling mode, the third heat exchanger T3 acts as a condenser and the second heat exchanger acts as an evaporator. The refrigerant output from the exhaust port of the compressor 310 enters the third heat exchanger T3 through the four-way valve 320 for heat exchange. After the heat exchange is completed, the refrigerant enters the liquid pipe through the second throttling component S2.

[0059] At this time, if the indoor unit module 200 is turned on, the main circuit unit 110 connects the indoor unit module 200 and the outdoor unit module 300. The refrigerant in the liquid pipe enters the second heat exchanger for heat exchange and is then transferred to the gas pipe through the main circuit unit 110. The refrigerant in the gas pipe enters the gas-liquid separator 330 through the four-way valve 320, and the gas-liquid separator 330 outputs refrigerant to the air inlet of the compressor 310. If the indoor unit module 200 is turned on, the main circuit unit 110 disconnects the connection between the indoor unit module 200 and the outdoor unit module 300.

[0060] If the indoor unit module 200 stops, the main circuit unit 110 disconnects the connection between the indoor unit module 200 and the outdoor unit module 300 to prevent refrigerant from entering the indoor unit module 200.

[0061] Understandably, in cooling mode, if the second heat exchanger has poor heat exchange, the refrigerant passing through the indoor unit module 200 will not evaporate completely. The incompletely evaporated refrigerant contains a lot of liquid refrigerant. Therefore, liquid return occurs on the suction side of the compressor 310. More refrigerant will be stored in the gas-liquid separator 330 as liquid when passing through the gas-liquid separator 330, resulting in a reduction in the suction volume of the compressor 310 and affecting the performance of the air conditioning system.

[0062] In this embodiment, to solve this problem, a first heat exchanger T1 is set in the main circuit unit 110 to perform secondary vaporization of the refrigerant in the gas pipe. Therefore, it can be understood that the first heat exchanger T1 is an evaporator. When secondary vaporization is not required, the third control valve C3 is closed, and the first heat exchanger T1 does not work. When secondary vaporization is required, the third control valve C3 is opened. At this time, the refrigerant output from the indoor unit module 200 is split off and evaporated again through the first heat exchanger T1. It then merges with the refrigerant output from the first control valve C1 and is output to the outdoor unit module 300, completing the secondary vaporization, reducing the proportion of liquid refrigerant in the gas pipe, increasing the suction capacity of the compressor 310, and ensuring the performance of the air conditioning system.

[0063] The following describes the states of different control valves in the main circuit unit 110 under different conditions:

[0064] In heating mode, if the indoor unit module 200 is turned on, the first control valve C1 and the second control valve C2 are opened, and the third control valve C3 is closed.

[0065] In heating mode, if the indoor unit module 200 stops, the first control valve C1, the second control valve C2, and the third control valve C3 will be closed.

[0066] In cooling mode, if the indoor unit module 200 is turned on and evaporation is incomplete, the second control valve C2 and the third control valve C3 will open, and the first control valve C1 will close.

[0067] In cooling mode, if the indoor unit module 200 is turned on and evaporation is complete, the first control valve C1, the second control valve C2, and the third control valve C3 will open.

[0068] In cooling mode, if the indoor unit module 200 stops, the first control valve C1, the second control valve C2, and the third control valve C3 will be closed.

[0069] Furthermore, the main circuit unit 110 also includes a first unloading valve U1 and a second unloading valve U2; wherein:

[0070] The first unloading valve U1 is connected between the gas pipe of the indoor unit module 200 and the gas pipe of the outdoor unit module 300, and the second unloading valve U2 is connected between the liquid pipe of the indoor unit module 200 and the liquid pipe of the outdoor unit module 300.

[0071] The first unloading valve U1 and the second unloading valve U2 are used to prevent excessive refrigerant pressure from causing pipe bursts. The pressure thresholds of the first unloading valve U1 and the second unloading valve U2 can be set based on the actual application scenario. When the gas pipe pressure is less than the pressure threshold of the first unloading valve U1, the first unloading valve U1 is closed; when the gas pipe pressure is greater than or equal to the pressure threshold of the first unloading valve U1, the first unloading valve U1 is open. When the liquid pipe pressure is less than the pressure threshold of the second unloading valve U2, the second unloading valve U2 is closed; when the liquid pipe pressure is greater than or equal to the pressure threshold of the second unloading valve U2, the second unloading valve U2 is open.

[0072] Furthermore, the circulation unit 120 includes a first throttling component S1; wherein:

[0073] The first throttling component S1 is connected between the liquid pipe and the gas pipe of the outdoor unit module 300.

[0074] When the outdoor unit module 300 and the indoor unit module 200 are disconnected by the main circuit unit 110, the liquid pipe and gas pipe in the outdoor unit module 300 corresponding to the indoor unit module 200 lose the circulation channel of the indoor unit module 200. At this time, the refrigerant in the gas pipe is cut off in the main circuit unit 110, and there is no refrigerant output in the liquid pipe. However, by connecting the gas pipe and the liquid pipe through the first throttling device, the circulation of the gas pipe and the liquid pipe can be realized. The refrigerant in the gas pipe enters the liquid pipe through the first throttling device and is then output to the outdoor unit module 300, avoiding the accumulation of refrigerant in the gas pipe. The specific opening degree of the first throttling device can be set according to actual needs.

[0075] This application also protects an air conditioning system, see [link to application]. Figure 3 or Figure 4 (For ease of explanation, Figure 3 The first unloading valve U1 and the second unloading valve U2 are not shown in the diagram. Their connection can be found in [reference needed]. Figure 2 The air conditioning system includes an outdoor unit module 300, multiple indoor unit modules 200, and multiple air conditioning control modules 100. Each indoor unit module 200 is connected to one of the air conditioning control modules 100. The structure of the air conditioning control module 100 can be referred to in the above embodiment and will not be repeated here. Therefore, since the air conditioning system of this embodiment adopts the technical solution of the air conditioning control module 100, the air conditioning system has all the beneficial effects of the air conditioning control module 100.

[0076] It should be noted that since there are multiple indoor unit modules 200, there are main pipes and branch pipes when establishing pipe connections. It can be understood that the main pipe is connected to the outdoor unit module 300, and each indoor unit module 200 is connected to the main pipe through a branch pipe. The air conditioning regulating module 100 is located between the branch pipe and the indoor unit module 200.

[0077] This application also protects a control method for an air conditioning regulating module, see [link to relevant documentation]. Figure 5 The air conditioning adjustment module control method is applied to the air conditioning system described above, and the air conditioning adjustment module control method includes:

[0078] Step S10: Obtain the current operating mode of the air conditioning system and the operating status of each indoor unit module;

[0079] The operating modes of the air conditioning system include heating mode and cooling mode; the operating status of the indoor unit module includes on and off.

[0080] Step S20: If an indoor unit module is in a stopped state, the connection between the liquid pipe and the gas pipe of the outdoor unit module is maintained through the circulation unit.

[0081] It should be noted that when some indoor unit modules are in a stopped state, the outdoor unit module remains running because other indoor unit modules are still running. Therefore, the aforementioned refrigerant accumulation problem exists. The circulation unit maintains the connection between the liquid and gas lines of the outdoor unit module. However, when all indoor unit modules are in a stopped state, the outdoor unit module is also stopped. In this case, the refrigerant does not flow in the system, and even if the liquid and gas lines of the outdoor unit module are not connected, the refrigerant accumulation problem will not occur. When all indoor unit modules are in a stopped state, the air conditioning control module can be set to the initial mode. In the initial mode, the main circuit unit connects the indoor and outdoor unit modules, and the circulation unit does not establish a connection channel. Specifically, the first and second control valves are open, the third control valve is closed, and the first throttling component is closed.

[0082] Step S30: If the current operating mode is heating mode, then for each indoor unit module, determine whether the operating status of the indoor unit module is off.

[0083] It should be noted that the method in this embodiment can be executed by a control device installed inside the air conditioner, or an additional control device can be installed. The control device is connected to the device to be controlled and the device to be detected. The specific settings can be based on the actual application scenario and will not be elaborated here.

[0084] The method for obtaining the operating status of the indoor unit module can be set according to actual needs, such as through system logs, flag bits corresponding to the operating status of the indoor unit module, etc.

[0085] Step S40: If the indoor unit module is in a stopped state, the main control unit disconnects the connection between the indoor unit module and the outdoor unit module. The main control unit belongs to the air conditioning control module corresponding to the indoor unit module.

[0086] If the indoor unit module is in the "on" state, the main control unit connects the indoor unit module and the outdoor unit module.

[0087] Based on the same reasoning as the aforementioned circulation unit, when all indoor unit modules are in a stopped state, the air conditioning adjustment module can be set to the initial mode. In the initial mode, the main circuit unit connects the indoor unit module and the outdoor unit module, and the circulation unit does not establish a connection channel. Specifically, the first control valve and the second control valve are open, the third control valve is closed, and the first throttling component is closed.

[0088] In this embodiment, the main circuit unit disconnects the connection between the indoor unit module and the outdoor unit module when the indoor unit module stops, thereby preventing refrigerant from entering the indoor unit module and causing heat loss. At the same time, the circulation unit maintains the connection between the liquid pipe and the gas pipe of the outdoor unit module, so that the refrigerant in the pipe keeps circulating and avoids refrigerant accumulation. By solving the problem of refrigerant accumulation, heat loss is also avoided.

[0089] Further, step S20 includes:

[0090] Step S21: Determine whether the indoor unit module whose operating status is stopped is a terminal indoor unit module;

[0091] Step S22: If the indoor unit module whose operating state is stopped is a terminal indoor unit module, then control the terminal circulation unit to connect the liquid pipe and gas pipe of the outdoor unit module, wherein the terminal circulation unit belongs to the air conditioning regulation module corresponding to the terminal indoor unit module.

[0092] It is understandable that the terminal indoor unit module is the indoor unit module located at the very downstream end of the main pipeline. It is also understandable that, in heating mode, for non-terminal indoor unit modules, a portion of the refrigerant in the main pipeline is diverted through the branch pipeline to enter the non-terminal indoor unit module for heat exchange, while the remainder flows into the downstream pipeline. However, for terminal indoor unit modules, the refrigerant flowing into the terminal indoor unit module from the main pipeline is the remaining refrigerant after upstream diversion, meaning that after passing through the terminal indoor unit module, there is no need for downstream diversion.

[0093] When a non-terminal indoor unit module stops, if the corresponding gas and liquid pipes of the non-terminal indoor unit module are connected through the corresponding circulation unit, some refrigerant in the main gas pipe will be diverted directly into the liquid pipe, resulting in a reduction in the amount of refrigerant downstream and affecting the heat exchange effect of the downstream indoor unit module. Therefore, to avoid this situation, the gas and liquid pipes of the non-terminal indoor unit module are not connected through the corresponding circulation unit when the non-terminal indoor unit module stops. It is understandable that when the non-terminal indoor unit module stops, the refrigerant in the gas pipe will still flow downstream, so there will be no problem of refrigerant accumulation.

[0094] When the terminal indoor unit module stops, there is a problem of refrigerant accumulation because there is no downstream diversion. The circulation unit needs to connect the gas pipe and liquid pipe corresponding to the terminal indoor unit module, without affecting the heat exchange efficiency of other indoor unit modules.

[0095] The following describes the state of the first throttling component in the circulation unit under different conditions:

[0096] In heating mode, if the indoor unit module is turned on, the first throttling component will be turned off;

[0097] In heating mode, if the indoor unit module is turned off, and the indoor unit module is a terminal indoor unit module, the first throttling component will be turned on.

[0098] In heating mode, if the indoor unit module is turned off and is a non-terminal indoor unit module, the first throttling component will be closed.

[0099] In cooling mode, the first throttling component is closed.

[0100] Further, after step S10, the following is included:

[0101] Step S50: If the current operating mode is cooling mode, then for each indoor unit module, determine whether the evaporation of the indoor unit module is incomplete;

[0102] Step S60: If the indoor unit module does not evaporate completely, the target heat exchanger is controlled to evaporate and exchange heat with the refrigerant output by the indoor unit module before outputting it to the outdoor unit module. The target heat exchanger is the first heat exchanger in the air conditioning regulation module corresponding to the indoor unit module.

[0103] Understandably, in cooling mode, if the second heat exchanger does not exchange heat well, the refrigerant passing through the indoor unit module will not evaporate completely. The incompletely evaporated refrigerant contains a lot of liquid refrigerant. Therefore, liquid return occurs on the suction side of the compressor. More refrigerant will be stored in the gas-liquid separator as liquid when passing through the gas-liquid separator, resulting in a reduction in the compressor's suction volume and affecting the performance of the air conditioning system.

[0104] In this embodiment, to solve this problem, a first heat exchanger is set in the main circuit unit to perform secondary vaporization of the refrigerant in the gas pipe. Therefore, it can be understood that the first heat exchanger is an evaporator. When secondary vaporization is not required, the third control valve is closed, and the first heat exchanger does not work. When secondary vaporization is required, the third control valve is opened. At this time, the refrigerant output from the indoor unit module is split off and evaporated again through the first heat exchanger. It then merges with the refrigerant output from the first control valve and is output to the outdoor unit module, completing the secondary vaporization. This reduces the proportion of liquid refrigerant in the gas pipe, increases the compressor's suction volume, and ensures the performance of the air conditioning system.

[0105] It is understandable that whether the evaporation of the indoor unit module is complete can be determined by selecting an appropriate method, as described in step S50:

[0106] Step S51: Obtain the outlet pipe temperature and inlet pipe temperature of the second heat exchanger, wherein the second heat exchanger is the heat exchanger in the indoor unit module;

[0107] Step S52: Calculate the difference between the outlet pipe temperature and the inlet pipe temperature to obtain the temperature difference.

[0108] Step S53: If the temperature difference is less than a preset difference, then the indoor unit module does not evaporate completely.

[0109] The inlet pipe temperature indicates the temperature of the refrigerant entering the second heat exchanger; the outlet pipe temperature indicates the temperature of the refrigerant output from the second heat exchanger; in cooling mode, the second heat exchanger is an evaporator, so the difference between the inlet pipe temperature and the outlet pipe temperature can reflect the degree of evaporation of the second heat exchanger; the preset difference indicates the minimum temperature difference required for the second heat exchanger to evaporate completely. Therefore, if the temperature difference is less than the preset difference, it is considered that the second heat exchanger is not evaporating completely, and vice versa.

[0110] Furthermore, to avoid misjudgment, a detection time can be set. Only when the temperature difference is less than the preset difference for a continuous period longer than the detection time is the indoor unit module considered to be incompletely evaporating. Similarly, after the indoor unit module is incompletely evaporating, only when the temperature difference is greater than or equal to the preset difference for a continuous period longer than the detection time is the indoor unit module considered to be completely evaporating, and only then will the secondary vaporization through the first heat exchanger be stopped.

[0111] This embodiment can accurately control the first heat exchanger.

[0112] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0113] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0114] The air conditioning control module control method of this application can be operated by electronic devices, as described above. Figure 6 In terms of hardware structure, the electronic device may include components such as a communication module 10, a memory 20, and a processor 30. In the electronic device, the processor 30 is connected to both the memory 20 and the communication module 10. The memory 20 stores a computer program, which is executed by the processor 30. When the computer program is executed, it implements the steps of the above-described method embodiments.

[0115] The communication module 10 can connect to external communication devices via a network. The communication module 10 can receive requests from the external communication devices and can also send requests, instructions, and information to the external communication devices. The external communication devices can be other electronic devices, servers, or IoT devices, such as televisions, etc.

[0116] The memory 20 can be used to store software programs and various data. The memory 20 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as obtaining the current operating mode of the air conditioning system and the operating status of each indoor unit module), etc.; the data storage area may include a database, and may store data or information created based on system usage. Furthermore, the memory 20 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0117] The processor 30 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 20, and by calling data stored in the memory 20, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. The processor 30 may include one or more processing units; optionally, the processor 30 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 30.

[0118] although Figure 6 Not shown, but the above-described electronic device may further include a circuit control module for connecting to a power supply to ensure the normal operation of other components. Those skilled in the art will understand that... Figure 6 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0119] This application also proposes a computer-readable storage medium having a computer program stored thereon. The computer-readable storage medium may be... Figure 6 The memory 20 in the electronic device may also be at least one of ROM (Read-Only Memory) / RAM (Random Access Memory), magnetic disk, optical disk, etc. The computer-readable storage medium includes a number of instructions to cause a terminal device with a processor (which may be a television, automobile, mobile phone, computer, server, terminal, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0120] In this application, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0122] Although embodiments of this application have been shown and described above, the scope of protection of this application is not limited thereto. It is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, and substitutions to the above embodiments within the scope of this application, and such changes, modifications, and substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioning control module, characterized in that, The air conditioning control module is connected to both the indoor unit module and the outdoor unit module; the air conditioning control module includes a main circuit unit and a circulation unit, the main circuit unit is connected between the indoor unit module and the outdoor unit module, and the circulation unit is connected between the liquid pipe and the gas pipe of the outdoor unit module; wherein: The main circuit unit is used to disconnect the connection between the indoor unit module and the outdoor unit module when the indoor unit module stops in heating mode; The circulation unit is used to maintain the connection between the liquid pipe and the gas pipe of the outdoor unit module; if the indoor unit module in the operation state is a terminal indoor unit module, the terminal circulation unit is controlled to connect the liquid pipe and the gas pipe of the outdoor unit module. The terminal circulation unit belongs to the air conditioning adjustment module corresponding to the terminal indoor unit module. When a non-terminal indoor unit module is stopped, the gas pipe and liquid pipe corresponding to the non-terminal indoor unit module are not connected through the corresponding circulation unit. When all the indoor unit modules are in a stopped state, the circulation unit does not establish a connection channel.

2. The air conditioning control module as described in claim 1, characterized in that, The main circuit unit includes a first control valve and a second control valve; wherein: The first control valve is connected between the gas pipe of the indoor unit module and the gas pipe of the outdoor unit module, and the second control valve is connected between the liquid pipe of the indoor unit module and the liquid pipe of the outdoor unit module.

3. The air conditioning control module as described in claim 2, characterized in that, The main circuit unit also includes a first heat exchanger and a third control valve; wherein: The first gas end of the first heat exchanger is connected to the gas pipe of the outdoor unit module, the second gas end of the first heat exchanger is connected to the gas pipe of the indoor unit module through the third control valve, and the liquid refrigerant passage of the first heat exchanger is connected between the second control valve and the liquid pipe of the outdoor unit module.

4. The air conditioning control module as described in claim 2, characterized in that, The main circuit unit further includes a first unloading valve and a second unloading valve; wherein: The first unloading valve is connected between the gas pipe of the indoor unit module and the gas pipe of the outdoor unit module, and the second unloading valve is connected between the liquid pipe of the indoor unit module and the liquid pipe of the outdoor unit module.

5. The air conditioning control module as described in claim 1, characterized in that, The circulation unit includes a first throttling component; wherein: The first throttling component is connected between the liquid pipe and the gas pipe of the outdoor unit module.

6. An air conditioning system, characterized in that, The air conditioning system includes an outdoor unit module, multiple indoor unit modules, and multiple air conditioning adjustment modules as described in any one of claims 1 to 5, wherein the indoor unit modules are connected to the air conditioning adjustment modules in a one-to-one correspondence.

7. A method for controlling an air conditioning regulation module, characterized in that, The air conditioning adjustment module control method is applied to the air conditioning system as described in claim 6, and the air conditioning adjustment module control method includes: Obtain the current operating mode of the air conditioning system and the operating status of each indoor unit module; In heating mode, if an indoor unit module is in a stopped state, the connection between the liquid pipe and the gas pipe of the outdoor unit module is maintained through the circulation unit. If the current operating mode is heating mode, then for each indoor unit module, determine whether the operating status of the indoor unit module is off. If the indoor unit module is in a stopped state, the main control unit disconnects the connection between the indoor unit module and the outdoor unit module. The main control unit belongs to the air conditioning control module corresponding to the indoor unit module. The step of maintaining the connection between the liquid pipe and the gas pipe of the outdoor unit module through the circulation unit includes: Determine whether the indoor unit module whose operating status is "stopped" is a terminal indoor unit module; If the indoor unit module in the shutdown state is a terminal indoor unit module, then the terminal circulation unit is controlled to connect the liquid pipe and gas pipe of the outdoor unit module. The terminal circulation unit belongs to the air conditioning regulation module corresponding to the terminal indoor unit module. When a non-terminal indoor unit module is shut down, the gas pipe and liquid pipe corresponding to the non-terminal indoor unit module are not connected through the corresponding circulation unit. When all the indoor unit modules are in a stopped state, the circulation unit does not establish a connection channel.

8. The air conditioning regulation module control method as described in claim 7, characterized in that, The main circuit unit includes a first control valve and a second control valve; wherein: The first control valve is connected between the gas pipe of the indoor unit module and the gas pipe of the outdoor unit module, and the second control valve is connected between the liquid pipe of the indoor unit module and the liquid pipe of the outdoor unit module. The main circuit unit also includes a first heat exchanger and a third control valve; wherein: The first gas end of the first heat exchanger is connected to the gas pipe of the outdoor unit module, the second gas end of the first heat exchanger is connected to the gas pipe of the indoor unit module through the third control valve, and the liquid refrigerant passage of the first heat exchanger is connected between the second control valve and the liquid pipe of the outdoor unit module. Following the step of obtaining the current operating mode of the air conditioning system and the operating status of each indoor unit module, the following is included: If the current operating mode is cooling mode, then for each indoor unit module, determine whether the evaporation of the indoor unit module is incomplete; If the indoor unit module does not evaporate completely, the target heat exchanger is controlled to evaporate and exchange heat with the refrigerant output by the indoor unit module before outputting it to the outdoor unit module. The target heat exchanger is the first heat exchanger in the air conditioning regulation module corresponding to the indoor unit module.

9. The air conditioning adjustment module control method as described in claim 8, characterized in that, The step of determining whether the indoor unit module is not evaporating completely includes: Obtain the outlet and inlet temperatures of the second heat exchanger, wherein the second heat exchanger is the heat exchanger in the indoor unit module; The temperature difference is obtained by calculating the difference between the outlet temperature and the inlet temperature. If the temperature difference is less than a preset difference, the indoor unit module will not evaporate completely.

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