Air conditioning equipment and control method thereof

Abstract

The invention provides air conditioning equipment and a control method thereof. The air conditioner includes: an outdoor unit; the refrigerant pipeline comprises a first branch and a second branch, and the first branch and the second branch are connected in parallel, both communicate with the refrigerant main path and are provided with a first middle heat exchange assembly and a second middle heat exchange assembly correspondingly. The refrigerant pipeline further comprises a third branch, one end of the third branch is connected to the part, located between the four-way valve and the outdoor heat exchange assembly, of the refrigerant main pipeline, and the other end of the third branch is connected to the second branch. The control device comprises an obtaining module and a control module, and after the control device receives a working instruction for controlling to enter the anti-freezing mode, the obtaining device is used for obtaining an anti-freezing component in the air conditioning equipment; the control module is used for controlling and adjusting the working state of the outdoor unit according to the anti-freezing component. According to the invention, a more flexible and efficient anti-freezing function is realized, the energy efficiency ratio of the system is improved, and the reliability and user experience of the system are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and particularly to an air conditioning device and a control method thereof. Background Art

[0002] In the related art, traditional air conditioning devices usually face the following problems in low temperature environments: (1) Single anti-freezing mode: Most air conditioning devices only adopt a single anti-freezing mode, that is, prevent icing by simply increasing the system temperature. This method is often not flexible enough and cannot adapt to various complex working conditions. (2) Energy waste: In order to prevent freezing, the system often needs to run at a higher temperature for a long time, which will cause unnecessary energy consumption. (3) High control complexity: In traditional air conditioning devices, the control logic for anti-freezing is relatively simple, lacking an intelligent dynamic adjustment mechanism and unable to precisely control the working state of each heat exchange component. (4) Reliability problems: Due to the lack of effective anti-freezing measures, some systems are prone to failures in cold weather, affecting the user experience. Summary of the Invention

[0003] The present invention provides an air conditioning device and a control method thereof to solve the defects existing in the prior art and achieve the following technical effects: Through a complex valve control system and an intelligent control module, a more flexible and efficient anti-freezing function is realized, which not only improves the energy efficiency ratio of the system, but also enhances the reliability of the system and the user experience.

[0004] An air conditioning device according to an embodiment of the first aspect of the present invention includes: An outdoor unit, including a compressor, a four-way valve, an outdoor heat exchange component, a first intermediate heat exchange component, and a second intermediate heat exchange component connected by a refrigerant pipeline; wherein, the refrigerant pipeline includes a main refrigerant path, a first branch, and a second branch. The first branch and the second branch are connected in parallel with each other and are both connected to the main refrigerant path. The first intermediate heat exchange component and the second intermediate heat exchange component are respectively provided on the first branch and the second branch. A first valve is provided on the first branch, a second valve is provided on the second branch, and the outdoor heat exchange component is provided on the main refrigerant path; Wherein, the refrigerant pipeline further includes a third branch. One end of the third branch is connected to a part of the main refrigerant path located between the four-way valve and the outdoor heat exchange component, and the other end of the third branch is connected to the second branch. A third valve is further provided on the third branch; and a fourth valve is further provided on a part of the second branch located between the main refrigerant path and the third branch; A plurality of indoor units, each indoor unit includes an indoor heat exchange component connected by a water pipeline, and the water pipeline of each indoor unit can selectively flow through the first intermediate heat exchange component or the second intermediate heat exchange component; The control device includes an acquisition module and a control module. After receiving a working instruction to control the entry into the anti-freezing mode, the acquisition device in the control device is used to acquire the anti-freezing components in the air-conditioning equipment; the control module is used to control and adjust the working state of the outdoor unit according to the anti-freezing components. Among them, the anti-freezing components include the first intermediate heat exchange assembly and the second intermediate heat exchange assembly.

[0005] According to an embodiment of the present invention, the heat exchange amount of the first intermediate heat exchange assembly is greater than or equal to the heat exchange amount of the second intermediate heat exchange assembly.

[0006] According to an embodiment of the present invention, the control module includes a first control module, and the first control module is specifically used for: When the anti-freezing component is the first intermediate heat exchange assembly, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange assembly to operate in heating mode and the second intermediate heat exchange assembly to operate in cooling mode.

[0007] According to an embodiment of the present invention, the control module includes a second control module, and the second control module is specifically used for: When the anti-freezing component is the second intermediate heat exchange assembly, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange assembly to operate in cooling mode and the second intermediate heat exchange assembly to operate in heating mode.

[0008] According to an embodiment of the present invention, the refrigerant pipeline further includes a fourth branch, the fourth branch is connected in parallel with the first intermediate heat exchange assembly and the second intermediate heat exchange assembly at the same time, and a fifth valve is provided on the fourth branch.

[0009] According to an embodiment of the present invention, the control module includes a third control module, and the third control module is specifically used for: When the anti-freezing component is the first intermediate heat exchange assembly and / or the second intermediate heat exchange assembly, control the first valve and / or the second valve and the fourth valve to open, and control the third valve and the fifth valve to close, and control the first intermediate heat exchange assembly and / or the second intermediate heat exchange assembly to operate in heating mode.

[0010] According to an embodiment of the present invention, in the acquisition module, the step of acquiring the anti-freezing components in the air-conditioning equipment specifically includes: Acquire the temperatures of the first intermediate heat exchange assembly and the second intermediate heat exchange assembly; When the temperature of the first intermediate heat exchange component is lower than the set freezing temperature, determine that the anti-freezing component is the first intermediate heat exchange component; Or, when the temperature of the second intermediate heat exchange component is lower than the set freezing temperature, determine that the anti-freezing component is the second intermediate heat exchange component; Or, when the temperatures of both the first intermediate heat exchange component and the second intermediate heat exchange component are lower than the set freezing temperature, determine that the anti-freezing components are the first intermediate heat exchange component and the second intermediate heat exchange component.

[0011] According to an embodiment of the present invention, the outdoor heat exchange component includes a first outdoor heat exchange device and a second outdoor heat exchange device. The refrigerant pipeline further includes a fifth branch and a sixth branch connected in parallel with each other. Both ends of the fifth branch and the sixth branch are connected to the refrigerant main path. The first outdoor heat exchange device and the second outdoor heat exchange device are respectively arranged on the fifth branch and the sixth branch.

[0012] According to an embodiment of the present invention, it further includes a first outdoor three-way valve and a second outdoor three-way valve. The first interface of the first outdoor three-way valve is connected to the exhaust port of the compressor through the fifth branch and the refrigerant main path in sequence. The second interface is connected to the first outdoor heat exchange device through the fifth branch. The third interface is connected to the suction port of the compressor through the seventh branch; The first interface of the second outdoor three-way valve is connected to the exhaust port of the compressor through the sixth branch and the refrigerant main path in sequence. The second interface is connected to the second outdoor heat exchange device through the sixth branch. The third interface is connected to the suction port of the compressor through the eighth branch.

[0013] According to the control method of the air conditioning device based on the first aspect embodiment of the present invention in the second aspect embodiment of the present invention, it includes: Receive a work instruction to control entering the anti-freezing mode, and obtain the anti-freezing component in the air conditioning device; According to the anti-freezing component, control and adjust the working state of the outdoor unit; Wherein, the anti-freezing component includes a first intermediate heat exchange component and a second intermediate heat exchange component.

[0014] The present invention provides an air conditioning device with an anti-freezing control device. Compared with the related art, this device has at least the following advantages.

[0015] (1)Multiple anti-freezing mechanisms: This air conditioning equipment adopts a complex valve control system, which can flexibly adjust the refrigerant flow path according to different anti-freezing requirements. By controlling the states of the first valve, the second valve, the third valve, and the fourth valve, various operation mode combinations between the first intermediate heat exchange component and the second intermediate heat exchange component can be achieved, thus more effectively preventing these components from freezing under low-temperature conditions.

[0016] (2)Energy consumption optimization: By dynamically adjusting the refrigerant flow path, the system can minimize unnecessary energy waste while ensuring anti-freezing. This design enables the system to improve energy utilization efficiency on the basis of meeting anti-freezing requirements.

[0017] (3)Intelligent control: This system is equipped with an acquisition module and a control module, which can monitor the system status in real time and automatically adjust the working mode according to the actual situation. This intelligent design not only simplifies the operation process but also improves the overall operation efficiency and reliability of the system.

[0018] (4)Reliability and user experience: Through effective anti-freezing control of key components in the system, this system can operate stably under harsh climate conditions, reduce the failure rate caused by icing, and thus improve the user experience.

[0019] In summary, compared with traditional air conditioning equipment, this air conditioning equipment realizes a more flexible and efficient anti-freezing function through a complex valve control system and an intelligent control module, which not only improves the energy efficiency ratio of the system but also enhances the reliability and user experience of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the full refrigeration mode.

[0022] Figure 2 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the full heating mode.

[0023] Figure 3 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the main heating mode.

[0024] Figure 4 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the main refrigeration mode.

[0025] Figure 5 It is a schematic structural diagram of the air-conditioning equipment provided by the present invention in the first defrosting mode.

[0026] Figure 6 It is one of the schematic structural diagrams of the air-conditioning equipment provided by the present invention in the second defrosting mode.

[0027] Figure 7 It is the second of the schematic structural diagrams of the air-conditioning equipment provided by the present invention in the second defrosting mode.

[0028] Figure 8 It is a schematic flow diagram of the control method of the air-conditioning equipment provided by the present invention.

[0029] Figure 9 It is a schematic structural diagram of the control device of the air-conditioning equipment provided by the present invention.

[0030] Figure 10 It is a schematic structural diagram of the electronic equipment provided by the present invention.

[0031] Explanation of reference numerals: 1. Compressor; 2. Four-way valve; 3. Outdoor heat exchange assembly; 31. First outdoor heat exchange device; 32. Second outdoor heat exchange device; 41. First intermediate heat exchange assembly; 42. Second intermediate heat exchange assembly; 5. Gas-liquid separator; 6. Oil separator; 7. Main refrigerant path; 71. First branch; 72. Second branch; 73. Third branch; 74. Fourth branch; 75. Fifth branch; 76. Sixth branch; 77. Seventh branch; 78. Eighth branch; 81. First valve; 82. Second valve; 83. Third valve; 84. Fourth valve; 85. Fifth valve; 86. First outdoor three-way valve; 87. Second outdoor three-way valve; 9. Indoor heat exchange assembly; 91. Water pipe; 92. First indoor three-way valve; 93. Second indoor three-way valve. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts fall within the scope of protection of the present invention.

[0033] As Figures 1 to 7 shown, the air-conditioning equipment according to the first aspect embodiment of the present invention includes a plurality of indoor units and outdoor units.

[0034] The outdoor unit includes a compressor 1, a four-way valve 2, an outdoor heat exchange component 3, a first intermediate heat exchange component 41, and a second intermediate heat exchange component 42 connected by refrigerant pipes; among them, the refrigerant pipes include a main refrigerant path 7, a first branch 71, and a second branch 72. The first branch 71 and the second branch 72 are connected in parallel to each other and are both connected to the main refrigerant path 7. The first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 are respectively provided on the first branch 71 and the second branch 72, and the outdoor heat exchange component 3 is provided on the main refrigerant path 7.

[0035] Each indoor unit includes an indoor heat exchange component 9 connected by a water pipe 91. The water pipe 91 of each indoor unit can selectively flow through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42.

[0036] It can be understood that in the present invention, the indoor unit and the outdoor unit are respectively two sets of flow path systems that are independent of each other, not connected to each other, and only have a heat exchange coupling relationship.

[0037] Among them, the outdoor unit is a refrigerant flow path system, and the filler inside is refrigerant (such as R32 or R454B refrigerant). Specifically, inside the outdoor unit, the four interfaces of the four-way valve 2 are respectively connected to the outdoor heat exchange component 3, the confluence of the first branch 71 and the second branch 72, the exhaust port of the compressor 1, and the suction port of the compressor 1 through the main refrigerant path 7. The refrigerant circulates between the compressor 1, the outdoor heat exchange component 3, and the intermediate heat exchange components (including the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42) through the main refrigerant path 7 for refrigeration cycle or heating cycle.

[0038] The indoor unit is a water flow path system, and the filler inside is water. Specifically, the number of indoor units is one, two, or more. Each indoor unit includes a water pipe 91 and an indoor heat exchange component 9. The water pipe 91 flows through the intermediate heat exchange components (including the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42), and forms a water circulation loop with the indoor heat exchange component 9. At this time, the water circulation loop can take away the cold or heat in the intermediate heat exchange components (including the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42), and supply cold or heat to the indoor heat exchange component 9, thereby realizing the refrigeration or heating of the indoor unit.

[0039] As described above, in the present invention, since the refrigerant (such as R32 or R454B) only circulates in the closed system of the outdoor unit, and the indoor unit uses water as the medium, this eliminates the possibility of the refrigerant directly entering the indoor environment, effectively prevents the potential explosion risk caused by refrigerant leakage, and improves the safety of the living or working environment.

[0040] Furthermore, in the present invention, the outdoor unit integrates a compressor 1, a four-way valve 2, an outdoor heat exchange component 3, and two key components (a first intermediate heat exchange component 41 and a second intermediate heat exchange component 42), which are connected by a carefully designed refrigerant pipeline system. The refrigerant pipeline is ingeniously divided into a main path and two parallel branch paths, which are respectively connected to the first and second intermediate heat exchange components 42. Such a design endows the system with the ability to flexibly distribute the refrigerant according to different requirements of the operating mode, thereby achieving optimal performance between the heating and cooling modes.

[0041] For example, in the heating mode, the high-temperature and high-pressure refrigerant discharged from the compressor 1 is guided by the four-way valve 2 and first enters the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42 to heat the water pipeline 91, so that the intermediate heat exchange component transfers the heat of the refrigerant to the water in the water pipeline 91, and then the water pipeline 91 sends the heat to the indoor heat exchange component 9 of the indoor unit, finally providing warmth for the room. In the cooling mode, the process is reversed. The low-temperature refrigerant in the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42 cools the water pipeline 91, and then the water pipeline 91 sends the cold quantity to the indoor heat exchange component 9 of the indoor unit to achieve the cooling effect.

[0042] Each indoor unit has its own indoor heat exchange component 9, and these components are connected through a water pipeline 91 network. The special design of the water pipeline 91 is that it allows each indoor unit to selectively flow through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42. This means that the system can independently control the supply of cold and heat sources according to the actual needs of each indoor unit. Whether it is heating or cooling, the system can accurately match the changes in the indoor environment and provide personalized temperature adjustment.

[0043] As described above, through the design of the main path and branch paths of the refrigerant pipeline, the system can flexibly adjust the working states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the actual load demand, realize the optimal distribution of the refrigerant, and improve the overall efficiency. In addition, since each indoor unit can independently select the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42, this means that even in the case of simultaneous heating and cooling demands, the system can meet the specific needs of each room through reasonable resource allocation.

[0044] As Figure 1 shown, according to some embodiments of the present invention, a first valve 81 is provided on the first branch path 71, and a second valve 82 is provided on the second branch path 72.

[0045] In this embodiment, the first valve 81 can control the on-off of the refrigerant in the first branch 71, that is, the first valve 81 can control whether the refrigerant flows through the first intermediate heat exchange component 41. The second valve 82 can control the on-off of the refrigerant in the second branch 72, that is, the second valve 82 can control whether the refrigerant flows through the second intermediate heat exchange component 42.

[0046] Specifically, on the one hand, the valve can be opened or closed to control whether the refrigerant flows through a specific intermediate heat exchange component. When the valve is closed, the refrigerant cannot pass through, thus preventing the heat exchange process on that branch; when the valve is opened, the refrigerant can flow through and participate in heat exchange, enabling heat to be transferred from the outdoor unit to the indoor unit or vice versa.

[0047] On the other hand, when the system needs to switch from the cooling mode to the heating mode, or adjust the operating mode according to the different requirements (cooling or heating) of the indoor unit, by controlling the on-off states of the first valve 81 and the second valve 82, flexible switching between the intermediate heat exchange components can be achieved, ensuring that the system operates in the most efficient mode according to the requirements.

[0048] In addition, according to the system load, the first valve 81 and the second valve 82 can help adjust the distribution of the refrigerant, making the refrigerant flow rate match the cooling or heating requirements of the indoor unit. For example, in the case of light load, only one valve needs to be opened to allow the refrigerant to flow through one intermediate heat exchange component; while in the case of high load, both valves need to be opened so that the two intermediate heat exchange components work simultaneously to improve the system efficiency.

[0049] It should also be noted that during maintenance or when a certain heat exchange component fails, the corresponding valve can be closed to isolate the problem component without affecting the operation of the entire system, thereby reducing the downtime and maintenance costs.

[0050] In some specific embodiments, the first valve 81 is a first expansion valve and a cut-off valve or a check valve is connected in parallel at both ends thereof. The second valve 82 is a second expansion valve and a cut-off valve or a check valve is connected in parallel at both ends thereof.

[0051] In this way, when throttling by the first expansion valve and the second expansion valve is not required, the above-mentioned cut-off valve or check valve can be opened to reduce the resistance of the refrigerant flow and ensure the smooth flow of the refrigerant.

[0052] As Figure 1 shown, according to some embodiments of the present invention, the refrigerant pipeline further includes a third branch 73. One end of the third branch 73 is connected to a part of the refrigerant main path 7 located between the four-way valve 2 and the outdoor heat exchange component 3. The other end of the third branch 73 is connected to the second branch 72. A third valve 83 is also provided on the third branch 73; and a fourth valve 84 is also provided on a part of the second branch 72 located between the refrigerant main path 7 and the third branch 73.

[0053] Among them, the third valve 83 and the fourth valve 84 are used to realize the conversion between the parallel state and the series state of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42.

[0054] In the air conditioning equipment of the present invention, by adding a third branch 73 and the corresponding third and fourth valves 84, the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 can not only work independently, but also be switched between the parallel and series states, thereby increasing the flexibility and efficiency of the system. The following will respectively explain the two states of parallel and series, and classify the working modes based on this.

[0055] For example Figure 1 and 2 As shown, in the parallel state, the third valve 83 is closed and the fourth valve 84 is open. This means that the refrigerant in the system can be directly split into the first branch 71 and the second branch 72, and enter the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 respectively. In this mode, the two heat exchange components work independently at the same time, which is suitable for the situation where a large amount of refrigerant is required for refrigeration or heating at the same time.

[0056] Another example Figure 3 and Figure 4 As shown, in the series state, the third valve 83 is open and the fourth valve 84 is closed. At this time, the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are in parallel with each other, and both the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are in series with the first intermediate heat exchange component 41. Specifically, for example, in Figure 3 In the main heating mode, the high-temperature and high-pressure refrigerant flowing out of the compressor first enters the first intermediate heat exchange component 41 through the first branch 71 and heats the water pipe 41. After passing through the first intermediate heat exchange component 41, the refrigerant is divided into two paths. One path of refrigerant flows through the outdoor heat exchange component 3 and absorbs heat, and the other path of refrigerant flows through the second intermediate heat exchange component 42 and cools the water pipe 41. Finally, the two paths of refrigerant merge and finally flow into the suction port of the compressor. In this mode, the refrigerant first passes through one heat exchange component and then flows into another, and at the same time realizes the refrigeration effect and the heating effect, which is suitable for the occasions where refrigeration and heating need to be realized at the same time and defrosting without stopping the machine.

[0057] Furthermore, since the first branch 71, the second branch 72, and the third branch 73 are provided in the equipment of the present invention, and valves (including the first valve 81, the second valve 82, the third valve 83, and the fifth valve 85) are correspondingly provided on each branch, therefore, by controlling the opening and closing states of the above-mentioned various valves, the outdoor unit can be switched between multiple different working modes, so as to meet the user's usage requirements of only refrigeration, only heating, and simultaneous heating and cooling.

[0058] Specifically, the different operating modes of the outdoor unit include: full cooling mode, full heating mode, main cooling mode, and main heating mode.

[0059] For example, in the full cooling mode, all indoor units are in the cooling state. The system will detect the total load demand and select the on-off states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the load size. If the load is small, only one heat exchange component needs to be turned on; if the load is large, the parallel mode will be adopted to make the two heat exchange components work simultaneously.

[0060] Another example, the full heating mode is similar to the full cooling mode, except that the flow direction of the refrigerant is opposite. The system selects the most effective heat exchange component operation mode according to the total heating demand to achieve the best heating effect.

[0061] For another example, when there are both cooling and heating demands in the indoor unit and the cooling demand is dominant, the system enters the main cooling mode. At this time, the first intermediate heat exchange component 41 will be used for cooling, while the second intermediate heat exchange component 42 will be used for heating, specifically depending on the ratio of the cooling and heating demands and the system settings.

[0062] Also for example, conversely, when the heating demand is dominant, the system enters the main heating mode. In this mode, the first intermediate heat exchange component 41 will be used for heating, while the second intermediate heat exchange component 42 will be used for cooling to meet the mixed demands of the indoor unit.

[0063] In summary, through the above design, the air-conditioning equipment of the present invention can intelligently adjust the working state of the heat exchange components according to different operating conditions, thereby maximizing the utilization of energy and achieving the efficient operation of the system while meeting the indoor temperature adjustment requirements.

[0064] According to some embodiments of the present invention, the heat exchange capacity of the first intermediate heat exchange component 41 is greater than or equal to the heat exchange capacity of the second intermediate heat exchange component 42.

[0065] The designs of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 are considered in view of the heat exchange requirements of the system in different operating modes. The heat exchange capacity of the first intermediate heat exchange component 41 is designed to be greater than or equal to that of the second intermediate heat exchange component 42 mainly to meet the higher heat exchange requirements during main heating or main cooling. This is because, in the main heating mode, the outdoor unit needs more heat to cope with the heating demand of the indoor unit, while in the main cooling mode, the outdoor unit needs stronger cooling capacity to cope with the cooling demand of the indoor unit. The larger heat exchange capacity of the first intermediate heat exchange component 41 can ensure that the system can effectively handle higher loads in these modes.

[0066] This design takes into account the heat exchange efficiency of the system under different operating modes, namely full cooling, full heating, primary cooling, and primary heating modes. In the full cooling or full heating mode, if the load is less than or equal to 50% of the total load, the system can choose to operate any one of the intermediate heat exchange components to save energy; when the load exceeds 50%, the two intermediate heat exchange components will operate simultaneously, or only the first intermediate heat exchange component 41 with higher heat exchange capacity can be turned on to meet higher heat exchange requirements. In the primary cooling or primary heating mode, the system will control the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 to operate simultaneously, and select the cooling operation or heating operation of the first intermediate heat exchange component 41 according to different modes to achieve the optimal heat exchange efficiency and energy utilization.

[0067] In addition, the size difference between the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 also takes into account the low probability that both loads reach 50% when cooling and heating operate simultaneously. By adjusting the sizes of the two heat exchange components, the operating efficiency of the system can be improved under most operating conditions, avoiding waste of resources.

[0068] The technical solution of the present invention optimizes the heat exchange capacity and operating strategy of the intermediate heat exchange component, enabling the system to achieve high efficiency and energy saving in various operating modes. Especially in the scenario of simultaneous cooling and heating requirements, the system can intelligently select the appropriate heat exchange component according to the actual load situation, ensuring the flexibility and economy of the system operation. This design not only improves the overall performance of the air conditioning equipment, but also reduces the operating cost to a certain extent and improves the user experience.

[0069] As Figure 1 shown, according to some embodiments of the present invention, the refrigerant pipeline further includes a fourth branch 74, the fourth branch 74 is connected in parallel with both the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, and a fifth valve 85 is provided on the fourth branch 74, wherein the fifth valve 85 is used to control whether to defrost the outdoor heat exchange component 3.

[0070] In the air conditioning equipment of the present invention, the addition of the fourth branch 74 and the setting of the fifth valve 85 are to enhance the flexibility and functionality of the system. Specifically, the fourth branch 74 is connected in parallel with the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, which means it provides an additional path for the refrigerant to bypass these two heat exchange components and flow directly through the fifth valve 85. The purpose of this design is to achieve the defrosting function of the system.

[0071] The defrosting mode is one of the very important functions when the air conditioning equipment operates in cold weather. When frost forms on the surface of the outdoor heat exchange component 3, it will affect the heat exchange efficiency, thereby reducing the performance of the air conditioner. By opening the fifth valve 85 on the fourth branch 74, the refrigerant can bypass the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 and directly enter the outdoor heat exchange component 3 for heating, so as to melt the frost layer on the surface. When the system detects that the surface temperature of the outdoor heat exchange component 3 is too low and reaches the preset defrosting threshold, the controller will automatically open the fifth valve 85 to guide the refrigerant to flow through the outdoor heat exchange component 3 for heating and defrosting.

[0072] Specifically, the operation logic of the defrosting mode is as follows: when the system detects that the defrosting condition is met, the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 will be closed, and the cooling or heating operation will stop. The controller opens the fifth valve 85, and the refrigerant directly flows to the outdoor heat exchange component 3 through the fourth branch 74. When the frost layer on the outdoor heat exchange component 3 melts and the temperature returns to the normal range, the system will close the fifth valve 85 again, open the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, and restore the cooling or heating function.

[0073] This design ensures that the system can still maintain good operation efficiency and comfort in winter or low-temperature environments, avoids the decrease in heat exchange efficiency caused by frost, and at the same time reduces the need for manual intervention, improving the automation degree and maintenance convenience of the system.

[0074] Furthermore, the air conditioning equipment of the present invention also includes a control device for implementing the anti-freezing control method. Specifically, the control device includes an acquisition module and a control module. After receiving the work instruction to control the entry into the anti-freezing mode, the acquisition device of the control device is used to acquire the anti-freezing components in the air conditioning equipment; the control module is used to control and adjust the working state of the outdoor unit according to the anti-freezing components.

[0075] Among them, the anti-freezing components include the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42.

[0076] The anti-freezing control method of the air conditioning equipment mainly ensures that these two components will not freeze in a low-temperature environment by controlling the operating states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42. Specifically, by adjusting the valve states in the system, the flow path of the refrigerant can be changed, so that one or both of the heat exchange components can obtain sufficient heat to prevent freezing.

[0077] Specifically, during the operation of the air conditioning equipment, both the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 have the risk of freezing.

[0078] Such as Figure 3As shown in the figure, for the first intermediate heat exchange component 41, its anti-freezing operation is as follows: Open the first valve 81, the second valve 82, and the third valve 83, and close the fourth valve 84. At this time, the first intermediate heat exchange component 41 enters the heating mode, and the second intermediate heat exchange component 42 enters the cooling mode. After the refrigerant is discharged from the compressor 1, a part of it is heated by the first intermediate heat exchange component 41, and another part is cooled by the second intermediate heat exchange component 42, and then they converge and return to the compressor 1.

[0079] As Figure 4 shown in the figure, for the second intermediate heat exchange component 42, its anti-freezing operation is as follows: Similarly, open the first valve 81, the second valve 82, and the third valve 83, and close the fourth valve 84. However, this time the first intermediate heat exchange component 41 enters the cooling mode, and the second intermediate heat exchange component 42 enters the heating mode. After the refrigerant is discharged from the compressor 1, a part of it is cooled by the first intermediate heat exchange component 41, and another part is heated by the second intermediate heat exchange component 42, and then they converge and return to the compressor 1.

[0080] As Figure 2 shown in the figure, for the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42, its anti-freezing operation is as follows: Open the first valve 81 and / or the second valve 82 and the fourth valve 84, and close the third valve 83 and the fifth valve 85. The first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42 enter the heating mode. After the refrigerant is discharged from the compressor 1, it enters the heat exchange component that needs anti-freezing through the opened valve for heating, and then returns to the compressor 1.

[0081] It can be understood that the system realizes the series-parallel conversion between the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 by controlling the states of the third valve 83 of the third branch 73 and the fourth valve 84 on a part of the second branch 72 located between the refrigerant main path 7 and the third branch 73. For example: When the third valve 83 is closed and the fourth valve 84 is opened, the refrigerant can flow to the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 simultaneously, realizing parallel operation. When the third valve 83 is opened and the fourth valve 84 is closed, the refrigerant first passes through one heat exchange component and then flows into the other, realizing series operation.

[0082] It can be understood that the main function of this anti-freezing control method is to prevent the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 from freezing due to too low temperature when the system operates in a cold environment. Through the above valve control, the system can selectively heat these components as needed, keep their working temperatures within a safe range, and ensure the continuous and reliable operation of the air conditioning equipment.

[0083] In summary, through the above control logic, the air conditioning equipment can adjust the valve state according to actual needs in different working modes to ensure that system components can work effectively under any circumstances. Especially in the anti-freezing mode, the system can prevent key components from freezing due to low temperature, ensuring the normal operation of the equipment in a low-temperature environment.

[0084] In the related art, traditional air conditioning equipment usually faces the following problems in a low-temperature environment: (1) Single anti-freezing mode: Most air conditioning equipment only adopts a single anti-freezing mode, that is, preventing ice formation by simply increasing the system temperature. This method is often not flexible enough to adapt to various complex working conditions. (2) Energy waste: To prevent freezing, the system often needs to run at a higher temperature for a long time, which leads to unnecessary energy consumption. (3) High control complexity: In traditional air conditioning equipment, the control logic for anti-freezing is relatively simple, lacking an intelligent dynamic adjustment mechanism and unable to precisely control the working state of each heat exchange component. (4) Reliability issues: Due to the lack of effective anti-freezing measures, some systems are prone to failures in cold weather, affecting the user experience.

[0085] Therefore, to solve the technical defects existing in the above related art, the present invention provides an air conditioning equipment with an anti-freezing control device, which has at least the following advantages compared with the related art.

[0086] (1) Multiple anti-freezing mechanisms: This air conditioning equipment adopts a complex valve control system, which can flexibly adjust the refrigerant flow path according to different anti-freezing requirements. By controlling the states of the first valve 81, the second valve 82, the third valve 83, and the fourth valve 84, various operation mode combinations between the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 can be achieved, thus more effectively preventing these components from freezing under low-temperature conditions.

[0087] (2) Energy consumption optimization: By dynamically adjusting the refrigerant flow path, the system can minimize unnecessary energy waste while ensuring anti-freezing. This design enables the system to improve energy utilization efficiency on the basis of meeting anti-freezing requirements.

[0088] (3) Intelligent control: This system is equipped with an acquisition module and a control module, which can monitor the system state in real time and automatically adjust the working mode according to the actual situation. This intelligent design not only simplifies the operation process but also improves the overall operation efficiency and reliability of the system.

[0089] (4) Reliability and user experience: Through effective anti-freezing control of key components in the system, this system can operate stably under harsh climate conditions, reducing the failure rate caused by icing, thereby improving the user experience.

[0090] In summary, compared with traditional air-conditioning equipment, the present air-conditioning equipment realizes a more flexible and efficient anti-freezing function through a complex valve control system and an intelligent control module, which not only improves the energy efficiency ratio of the system, but also enhances the reliability of the system and the user experience.

[0091] The following introduces in detail the anti-freezing control method and its control device of the air-conditioning equipment of the present invention through several specific embodiments.

[0092] In a specific embodiment of the present invention, the control module includes a first control module, and the first control module is specifically used for: When the anti-freezing component is the first intermediate heat exchange component 41, control the first valve 81, the second valve 82, and the third valve 83 to open and the fourth valve 84 to close, and control the first intermediate heat exchange component 41 to operate in heating mode and the second intermediate heat exchange component 42 to operate in cooling mode.

[0093] For example Figure 3 As shown, if the temperature of the first intermediate heat exchange component 41 is lower than the set freezing temperature, the outdoor unit enters the anti-freezing mode, and in the anti-freezing mode, the first valve 81, the second valve 82, and the third valve 83 are opened, and the fourth valve 84 and the fifth valve 85 are closed.

[0094] In the anti-freezing mode, the heat exchange amount of the first intermediate heat exchange component 41 is greater than that of the second intermediate heat exchange component 42. At this time, the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are in parallel and both act as evaporators, and the first intermediate heat exchange component 41 acts as a condenser. It can be understood that in the above anti-freezing mode, the heat exchange amount of the outdoor heat exchange component 3 plus the refrigeration load of the air-conditioning equipment is equal to the heating load of the air-conditioning equipment.

[0095] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The high-temperature refrigerant flows out from the exhaust port of the compressor 1. After passing through the four-way valve 2, the high-temperature refrigerant flows through the refrigerant main path 7 and the first branch path 71 in sequence and enters the first intermediate heat exchange component 41 to perform condensation heat release, so that the first intermediate heat exchange component 41 is heated to avoid freezing of the first intermediate heat exchange component 41.

[0096] The high-temperature refrigerant becomes low-temperature refrigerant after flowing out of the first intermediate heat exchange component 41. Among them, a part of the low-temperature refrigerant flows into the second intermediate heat exchange component 42 through the second branch path 72 to perform evaporation heat absorption, so as to cool a part of the indoor unit corresponding to the second intermediate heat exchange component 42. This part of the refrigerant flows into the refrigerant main path 7 through the third branch path 73 after flowing out of the second intermediate heat exchange component 42; another part of the low-temperature refrigerant flows into the outdoor heat exchange component 3 through the refrigerant main path 7 to perform evaporation heat absorption. After this part of the refrigerant flows out of the outdoor heat exchange component 3, it converges with the refrigerant in the third branch path 73 into the refrigerant main path 7. Finally, the refrigerant flows back to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigerant cycle.

[0097] In another specific embodiment of the present invention, the control module includes a second control module, and the second control module is specifically configured to: When the anti-freezing component is the second intermediate heat exchange component 42, control the first valve 81, the second valve 82, and the third valve 83 to open and the fourth valve 84 to close, and control the first intermediate heat exchange component 41 to operate in refrigeration and the second intermediate heat exchange component 42 to operate in heating.

[0098] For example Figure 4 As shown, if the temperature of the second intermediate heat exchange component 42 is lower than the set freezing temperature, the outdoor unit enters the anti-freezing mode, and in the anti-freezing mode, the first valve 81, the second valve 82, and the third valve 83 are opened, and the fourth valve 84 and the fifth valve 85 are closed.

[0099] In the anti-freezing mode, the heat exchange amount of the first intermediate heat exchange component 41 is greater than that of the second intermediate heat exchange component 42. At this time, the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are connected in parallel and both act as condensers, and the first intermediate heat exchange component 41 acts as an evaporator. It can be understood that in the above main refrigeration mode, the heat exchange amount of the outdoor heat exchange component 3 plus the heating load of the air conditioning equipment is equal to the refrigeration load of the air conditioning equipment.

[0100] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The high-temperature refrigerant flows out from the exhaust port of the compressor 1. After passing through the four-way valve 2, the high-temperature refrigerant is divided into two paths. One path of the high-temperature refrigerant flows through the outdoor heat exchange component 3 to condense and release heat, and the other path of the high-temperature refrigerant flows through the second intermediate heat exchange component 42 through the third branch 73 to condense and release heat, so that the second intermediate heat exchange component 42 is heated to avoid freezing of the second intermediate heat exchange component 42. The two paths of high-temperature refrigerant become low-temperature refrigerant after condensing and releasing heat and converge to the first branch 71. The low-temperature refrigerant flows through the first intermediate heat exchange component 41 to evaporate and absorb heat, so as to cool the corresponding part of the indoor unit corresponding to the first intermediate heat exchange component 41.

[0101] Finally, after the refrigerant flows out of the first intermediate heat exchange component 41, it returns to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigerant cycle.

[0102] In still another specific embodiment of the present invention, the control module includes a third control module, and the third control module is specifically configured to: When the anti-freezing component is the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42, control the first valve 81 and / or the second valve 82 and the fourth valve 84 to open, and control the third valve 83 and the fifth valve 85 to close, and control the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42 to operate in heating.

[0103] For exampleFigure 2 As shown, when the temperatures of both the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42 are lower than the set freezing temperature, the outdoor unit enters the anti-freezing mode. In the anti-freezing mode, at least one of the first valve 81 and the second valve 82 and the fourth valve 84 are opened, and the third valve 83 and the fifth valve 85 are closed.

[0104] In the anti-freezing mode, the outdoor heat exchange component 3 serves as an evaporator, and the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 are connected in parallel and both serve as condensers.

[0105] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The high-temperature refrigerant flows out from the exhaust port of the compressor 1, passes through the four-way valve 2 and enters the intermediate heat exchange component for condensation heat release. Among them, if both the first valve 81 and the second valve 82 are opened, the high-temperature refrigerant is divided into two parts and enters the first branch 71 and the second branch 72 respectively, and condenses and releases heat in the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 respectively, so as to heat the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 respectively to avoid freezing of both; if one of the first valve 81 and the second valve 82 is opened, the high-temperature refrigerant all enters the first branch 71 or the second branch 72, and all flows through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 for condensation heat release, so as to heat the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 to avoid its freezing. After flowing out of the intermediate heat exchange component, the high-temperature refrigerant becomes a low-temperature refrigerant, and the low-temperature refrigerant flows through the outdoor heat exchange component 3 and evaporates and absorbs heat.

[0106] Finally, after the refrigerant flows out of the outdoor heat exchange component 3, it returns to the suction port of the compressor 1 through the four-way valve 2 again to complete a heating cycle.

[0107] It should be noted that the opening and closing conditions of the above-mentioned first valve 81 and second valve 82 can be controlled according to the temperatures of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, which will be introduced in detail below, so it will not be elaborated here.

[0108] As Figure 1 shown, according to some embodiments of the present invention, the outdoor heat exchange component 3 includes a first outdoor heat exchange device 31 and a second outdoor heat exchange device 32, and the refrigerant pipeline further includes a fifth branch 75 and a sixth branch 76 connected in parallel. Both ends of the fifth branch 75 and the sixth branch 76 are connected to the refrigerant main path 7, and the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 are respectively arranged on the fifth branch 75 and the sixth branch 76.

[0109] In the present invention, the outdoor heat exchange assembly 3 is designed to include a first outdoor heat exchange device 31 and a second outdoor heat exchange device 32, which are connected in parallel with each other through the fifth branch 75 and the sixth branch 76 in the refrigerant pipeline. Both ends of the fifth branch 75 and the sixth branch 76 are connected to the refrigerant main path 7, enabling the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 to operate independently or simultaneously, providing higher flexibility and efficiency for the system.

[0110] This design allows the system to selectively activate the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32, or operate both simultaneously, according to different operating requirements and load conditions, in order to optimize energy utilization and system performance. Under low load conditions, the system will only use one outdoor heat exchange device to meet the demand, saving energy; while under high load conditions, the two outdoor heat exchange devices can work simultaneously to provide additional cooling or heating capacity, ensuring the efficient operation of the system.

[0111] In addition, this parallel configuration of outdoor heat exchange devices also improves the redundancy and reliability of the system. If one of the heat exchange devices fails or requires maintenance, the system can still continue to operate through the other heat exchange device, avoiding the shutdown of the entire system and ensuring continuous service and user satisfaction.

[0112] As Figure 6 and Figure 7 shown, in some specific embodiments of the present invention, the outdoor unit further includes a first outdoor three-way valve 86 and a second outdoor three-way valve 87. The first interface of the first outdoor three-way valve 86 is connected to the exhaust port of the compressor 1 through the fifth branch 75 and the refrigerant main path 7 in sequence. The second interface is connected to the first outdoor heat exchange device 31 through the fifth branch 75, and the third interface is connected to the suction port of the compressor 1 through the seventh branch 77.

[0113] The first interface of the second outdoor three-way valve 87 is connected to the exhaust port of the compressor 1 through the sixth branch 76 and the refrigerant main path 7 in sequence. The second interface is connected to the second outdoor heat exchange device 32 through the sixth branch 76, and the third interface is connected to the suction port of the compressor 1 through the eighth branch 78.

[0114] Among them, the first outdoor three-way valve 86 and the second outdoor three-way valve 87 are used to select the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32 for defrosting.

[0115] In this embodiment, the first outdoor three-way valve 86 and the second outdoor three-way valve 87 are respectively connected to the exhaust port and the suction port of the compressor 1, and are connected to the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 through different branches, forming a flexible refrigerant circulation path, thereby realizing defrosting of the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32.

[0116] In the defrosting mode, the system selectively allows the high-temperature refrigerant to first flow through the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32 by controlling the switching states of the first outdoor three-way valve 86 and the second outdoor three-way valve 87, so as to achieve defrosting of a specific heat exchange device. When the second interfaces of the first outdoor three-way valve 86 and the second outdoor three-way valve 87 are activated, the refrigerant will flow through the corresponding outdoor heat exchange device, and use the high-temperature and high-pressure refrigerant generated by the compressor 1 to melt the frost layer on the surface of the heat exchange component, thereby restoring the heat exchange efficiency.

[0117] For example Figure 6 As shown, when the first interface of the first outdoor three-way valve 86 is communicated with the second interface, and the second interface of the second outdoor three-way valve 87 is communicated with the third interface, the high-temperature refrigerant first flows from the exhaust port of the compressor 1 to the first outdoor heat exchange device 31, thereby defrosting the first outdoor heat exchange device 31. The low-temperature refrigerant after defrosting sequentially passes through the second outdoor heat exchange device 32 and the four-way valve 2, and then returns to the suction port of the compressor 1 again to complete a defrosting cycle.

[0118] Another example Figure 7 As shown, when the first interface of the second outdoor three-way valve 87 is communicated with the second interface, and the second interface of the first outdoor three-way valve 86 is communicated with the third interface, the high-temperature refrigerant first flows from the exhaust port of the compressor 1 to the second outdoor heat exchange device 32, thereby defrosting the second outdoor heat exchange device 32. The low-temperature refrigerant after defrosting sequentially passes through the first outdoor heat exchange device 31 and the four-way valve 2, and then returns to the suction port of the compressor 1 again to complete a defrosting cycle.

[0119] The advantage of this design is that it allows the system to flexibly select the heat exchange component that needs to be defrosted during the defrosting process, without affecting the normal operation of other heat exchange components, improving the overall operation efficiency and stability of the system. In addition, through the intelligent control of the three-way valve, rapid and accurate defrosting can be achieved, reducing the defrosting time, lowering the energy consumption, and enhancing the user experience.

[0120] As Figure 1 shown, according to some embodiments of the present invention, the water pipe 91 can selectively flow through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 through the first indoor three-way valve 92 and the second indoor three-way valve 93.

[0121] Specifically, the first indoor three-way valve 92 and the second indoor three-way valve 93 are respectively arranged at both ends of the indoor heat exchange assembly 9. Among them, the three interfaces of the first indoor three-way valve 92 are respectively connected to the first intermediate heat exchange assembly 41, the second intermediate heat exchange assembly 42 and the indoor heat exchange assembly 9, and the three interfaces of the second indoor three-way valve 93 are respectively connected to the first intermediate heat exchange assembly 41, the second intermediate heat exchange assembly 42 and the indoor heat exchange assembly 9. In this way, by adjusting the connection status of the interfaces of the first indoor three-way valve 92 and the second indoor three-way valve 93, the water pipeline 91 can selectively flow through the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42, so as to realize the cooling or heating of the indoor heat exchange assembly 9 by the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42.

[0122] In other embodiments, the above three-way valve (i.e., the first indoor three-way valve 92 or the second indoor three-way valve 93) can also be replaced by two groups of stop valves to achieve the above-mentioned selective flow relationship of the water pipeline 91; in addition, the structure of the three-way valve or stop valve for switching the indoor cooling or heating mechanism can be arranged on the outdoor unit, or on the indoor unit, or can be centrally arranged in one or more boxes, which is mainly selected according to the installation convenience and installation cost, and the present invention does not make special limitations here.

[0123] Next, a specific embodiment of the structure of the air conditioning equipment of the present invention will be described with reference to the accompanying drawings, and each working state and working mode of the air conditioning equipment will be introduced in detail according to this specific embodiment.

[0124] As Figures 1 to 7 shown, the air conditioning equipment includes an outdoor unit and several indoor units. The outdoor unit includes a compressor 1, a four-way valve 2, an outdoor heat exchange assembly 3, a first intermediate heat exchange assembly 41, a second intermediate heat exchange assembly 42, a gas-liquid separator 5 and an oil separator 6 connected through a refrigerant pipeline. Each indoor unit includes an indoor heat exchange assembly 9 connected through a water pipeline 91, wherein the water pipeline 91 can selectively flow through the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42 through the first indoor three-way valve 92 and the second indoor three-way valve 93.

[0125] The four interfaces of the four-way valve 2 are respectively connected to the outdoor heat exchange assembly 3, the confluence of the first branch 71 and the second branch 72, the exhaust port of the compressor 1, and the suction port of the compressor 1 through the main refrigerant path 7. One end of the third branch 73 is connected to a part of the main refrigerant path 7 located between the four-way valve 2 and the outdoor heat exchange assembly 3, and the other end of the third branch 73 is connected to the second branch 72. A third valve 83 is also provided on the third branch 73; and a fourth valve 84 is also provided on a part of the second branch 72 between the main refrigerant path 7 and the third branch 73. The refrigerant pipeline further includes a fourth branch 74. The fourth branch 74 is connected in parallel with the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 at the same time, and a fifth valve 85 is provided on the fourth branch 74.

[0126] The outdoor heat exchange assembly 3 includes a first outdoor heat exchange device 31 provided on the fifth branch 75 and a second outdoor heat exchange device 32 provided on the sixth branch 76, and the fifth branch 75 and the sixth branch 76 are connected in parallel and both communicate with the main refrigerant path 7.

[0127] The following introduces several working modes of the air conditioning equipment described in the above specific embodiments with reference to the drawings.

[0128] (I) Full refrigeration mode: As Figure 1 shown, when the target working modes of all indoor units are refrigeration modes, the outdoor unit enters the full refrigeration mode. In the full refrigeration mode, at least one of the first valve 81 and the second valve 82 and the fourth valve 84 are opened, and the third valve 83 and the fifth valve 85 are closed.

[0129] In the full refrigeration mode, the outdoor heat exchange assembly 3 serves as a condenser, and the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 are connected in parallel with each other and both serve as evaporators.

[0130] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The refrigerant flows out from the exhaust port of the compressor 1, enters the outdoor heat exchange assembly 3 (including the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 connected in parallel) through the four-way valve 2, and becomes a low-temperature refrigerant after condensing and releasing heat in the outdoor heat exchange assembly 3. After flowing out of the outdoor heat exchange assembly 3, if both the first valve 81 and the second valve 82 are opened, the low-temperature refrigerant is split into two parts and enters the first branch 71 and the second branch 72 respectively, and evaporates and absorbs heat in the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 respectively, so as to refrigerate the indoor unit; if one of the first valve 81 and the second valve 82 is opened, the low-temperature refrigerant all enters the first branch 71 or the second branch 72, and all flows through the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42 to evaporate and absorb heat, so as to refrigerate the indoor unit.

[0131] Finally, after the refrigerant flows out of the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42, it flows back to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigeration cycle.

[0132] It should be noted that the opening and closing conditions of the above-mentioned first valve 81 and second valve 82 can be controlled according to the load ranges of the indoor unit and the outdoor unit, which will be introduced in detail below, so it will not be elaborated here.

[0133] (2) Full heating mode: As Figure 2 shown, when the target operating modes of all indoor units are heating modes, the outdoor unit enters the full heating mode. And in the full heating mode, at least one of the first valve 81 and the second valve 82 and the fourth valve 84 are opened, and the third valve 83 and the fifth valve 85 are closed.

[0134] In the full heating mode, the outdoor heat exchange component 3 serves as an evaporator, and the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 are connected in parallel and both serve as condensers.

[0135] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The high-temperature refrigerant flows out of the exhaust port of the compressor 1, passes through the four-way valve 2 and enters the intermediate heat exchange component to release heat by condensation. Among them, if both the first valve 81 and the second valve 82 are opened, the high-temperature refrigerant is divided into two parts and enters the first branch 71 and the second branch 72 respectively, and releases heat by condensation in the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 respectively, so as to heat the indoor unit; if one of the first valve 81 and the second valve 82 is opened, the high-temperature refrigerant all enters the first branch 71 or the second branch 72, and all flows through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 to release heat by condensation, so as to heat the indoor unit. After flowing out of the intermediate heat exchange component, the high-temperature refrigerant becomes low-temperature refrigerant, and the low-temperature refrigerant flows through the outdoor heat exchange component 3 and absorbs heat by evaporation.

[0136] Finally, after the refrigerant flows out of the outdoor heat exchange component 3, it flows back to the suction port of the compressor 1 through the four-way valve 2 again to complete a heating cycle.

[0137] It should be noted that the opening and closing conditions of the above-mentioned first valve 81 and second valve 82 can be controlled according to the load ranges of the indoor unit and the outdoor unit, which will be introduced in detail below, so it will not be elaborated here.

[0138] (3) Hybrid working mode (main heating mode): As Figure 3As shown, when the target operating modes of all indoor units simultaneously include the cooling mode and the heating mode, if the heating load of the air conditioning equipment is greater than its cooling load, the outdoor unit enters the main heating mode in the hybrid operating mode. And in the main heating mode, the first valve 81, the second valve 82, and the third valve 83 are opened, and the fourth valve 84 and the fifth valve 85 are closed.

[0139] In the main heating mode, the heat exchange capacity of the first intermediate heat exchange component 41 is greater than that of the second intermediate heat exchange component 42. At this time, the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are in parallel and both act as evaporators, and the first intermediate heat exchange component 41 acts as a condenser. It can be understood that in the above-mentioned main heating mode, the heat exchange amount of the outdoor heat exchange component 3 plus the cooling load of the air conditioning equipment is equal to the heating load of the air conditioning equipment.

[0140] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The high-temperature refrigerant flows out from the exhaust port of the compressor 1. After passing through the four-way valve 2, the high-temperature refrigerant sequentially flows through the main refrigerant path 7 and the first branch 71 and enters the first intermediate heat exchange component 41 to release heat by condensation, thereby heating a part of the indoor units corresponding to the first intermediate heat exchange component 41.

[0141] After flowing out of the first intermediate heat exchange component 41, the high-temperature refrigerant becomes low-temperature refrigerant. Among them, a part of the low-temperature refrigerant flows into the second intermediate heat exchange component 42 through the second branch 72 to absorb heat by evaporation, thereby cooling a part of the indoor units corresponding to the second intermediate heat exchange component 42. This part of the refrigerant flows into the main refrigerant path 7 through the third branch 73 after flowing out of the second intermediate heat exchange component 42; Another part of the low-temperature refrigerant flows into the outdoor heat exchange component 3 through the main refrigerant path 7 to absorb heat by evaporation. After flowing out of the outdoor heat exchange component 3, this part of the refrigerant converges with the refrigerant in the third branch 73 into the main refrigerant path 7. Finally, the refrigerant flows back to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigerant cycle.

[0142] (4) Hybrid operating mode (main cooling mode): As Figure 4 shown, when the target operating modes of all indoor units simultaneously include the cooling mode and the heating mode, if the cooling load of the air conditioning equipment is greater than its heating load, the outdoor unit enters the main cooling mode in the hybrid operating mode. And in the main cooling mode, the first valve 81, the second valve 82, and the third valve 83 are opened, and the fourth valve 84 and the fifth valve 85 are closed.

[0143] In the main refrigeration mode, the heat exchange amount of the first intermediate heat exchanger is greater than that of the second intermediate heat exchange component 42. At this time, the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are in parallel and both act as condensers, and the first intermediate heat exchange component 41 acts as an evaporator. It can be understood that in the above main refrigeration mode, the heat exchange amount of the outdoor heat exchange component 3 plus the heating load of the air conditioning equipment is equal to the refrigeration load of the air conditioning equipment.

[0144] At this time, the refrigerant flow path in the outdoor unit is as follows: The high-temperature refrigerant flows out from the exhaust port of the compressor 1. After passing through the four-way valve 2, the high-temperature refrigerant is divided into two paths. One path of the high-temperature refrigerant flows through the outdoor heat exchange component 3 to condense and release heat, and the other path of the high-temperature refrigerant passes through the third branch 73 to flow through the second intermediate heat exchange component 42 to condense and release heat, so as to heat a part of the indoor unit corresponding to the second intermediate heat exchange component 42. After the two paths of high-temperature refrigerant condense and release heat, they become low-temperature refrigerant and converge to the first branch 71. The low-temperature refrigerant flows through the first intermediate heat exchange component 41 to evaporate and absorb heat, so as to cool a part of the indoor unit corresponding to the first intermediate heat exchange component 41.

[0145] Finally, after the refrigerant flows out of the first intermediate heat exchange component 41, it returns to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigerant cycle.

[0146] (V) The first defrosting mode: As Figure 5 shown, when it is detected that the outdoor heat exchange component 3 is frosted due to too low temperature, the outdoor unit enters the first defrosting mode for defrosting the outdoor heat exchange component 3. In the first defrosting mode, the fourth valve 84 and the fifth valve 85 are opened, and the first valve 81, the second valve 82 and the third valve 83 are closed.

[0147] The refrigerant flow path is as follows: The high-temperature refrigerant flows from the exhaust port of the compressor 1 to the four-way valve 2, enters the outdoor heat exchange component 3 through the four-way valve 2, so as to heat and defrost the outdoor heat exchange component 3. The defrosted low-temperature refrigerant sequentially returns to the suction port of the compressor 1 through the fourth branch 74 and the four-way valve 2 to complete a defrosting cycle.

[0148] (VI) The second defrosting mode: As Figure 6 and Figure 7 shown, in the case where the outdoor unit includes the first outdoor three-way valve 86 and the second outdoor three-way valve 87, the outdoor unit also has the second defrosting mode. At this time, the first valve 81, the second valve 82, the third valve 83, the fourth valve 84 and the fifth valve 85 are all closed. In the second defrosting mode, the system can achieve targeted defrosting of the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32 by controlling the interface connection relationship of the first outdoor three-way valve 86 and the second outdoor three-way valve 87.

[0149] For example Figure 6As shown, when the first interface of the first outdoor three-way valve 86 is communicated with the second interface, and the second interface of the second outdoor three-way valve 87 is communicated with the third interface, the system defrosts the first outdoor heat exchange device 31 specifically.

[0150] For another example Figure 7 As shown, when the first interface of the second outdoor three-way valve 87 is communicated with the second interface, and the second interface of the first outdoor three-way valve 86 is communicated with the third interface, the system defrosts the second outdoor heat exchange device 32 specifically.

[0151] (7) Anti-freezing mode: The anti-freezing mode is a mode in which one of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 generates heat and the other cools. The connection relationship and the refrigerant flow path of the anti-freezing mode are similar to the above-mentioned main heating mode or main cooling mode, and the present invention will not elaborate herein.

[0152] It should be noted that the application scenario of the anti-freezing mode is: when it is detected that the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 has a risk of freezing due to too low temperature, the outdoor unit performs an anti-freezing operation (i.e., heating) on the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42.

[0153] Next, the control method, control device and air-conditioning equipment of the air-conditioning equipment proposed by the present invention will be described with reference to the accompanying drawings. Among them, before the embodiments of the present invention are described in detail, the entire application scenario will be described first. The control method, control device, electronic device and computer-readable storage medium of the air-conditioning equipment in the embodiments of the present invention can be applied not only to the local area of the air-conditioning equipment, but also to the cloud platform in the Internet field, or the cloud platform in other types of Internet fields, or can also be applied to third-party devices. Among them, the third-party devices will include various different types such as mobile phones, tablet computers, notebooks, in-vehicle computers and other intelligent terminals.

[0154] Next, only the control method applicable to the air-conditioning equipment will be used as an example for illustration. It should be understood that the control method in the embodiments of the present invention can also be applicable to the cloud platform and third-party devices.

[0155] As Figure 8 shown, the control method of the air-conditioning equipment according to the second aspect embodiment of the present invention includes: Receiving a work instruction to control the entry into the anti-freezing mode, and obtaining the anti-freezing components in the air-conditioning equipment; Controlling and adjusting the working state of the outdoor unit according to the anti-freezing components; Among them, the anti-freezing components include the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42.

[0156] As Figure 9As shown, the control device of the air conditioning equipment according to the third aspect embodiment of the present invention includes: An acquisition module 110, which receives a working instruction to control entry into the anti-freezing mode and acquires the anti-freezing components in the air conditioning equipment; A control module 120, which controls and adjusts the working state of the outdoor unit according to the anti-freezing components. Among them, the anti-freezing components include a first intermediate heat exchange assembly 41 and a second intermediate heat exchange assembly 42.

[0157] Figure 10 An example of the physical structure schematic diagram of an electronic device is shown as Figure 10 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 complete mutual communication through the communication bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the control method of the air conditioning equipment, including: receiving a working instruction to control entry into the anti-freezing mode and acquiring the anti-freezing components in the air conditioning equipment; controlling and adjusting the working state of the outdoor unit according to the anti-freezing components; among them, the anti-freezing components include a first intermediate heat exchange assembly 41 and a second intermediate heat exchange assembly 42.

[0158] In addition, when the logical instructions in the above-mentioned memory 830 can be implemented in the form of software function units and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0159] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the air-conditioning device provided by each of the above methods, including: receiving a working instruction to control entry into the anti-freezing mode, and obtaining the anti-freezing component in the air-conditioning device; controlling and adjusting the working state of the outdoor unit according to the anti-freezing component; wherein, the anti-freezing component includes a first intermediate heat exchange component 41 and a second intermediate heat exchange component 42.

[0160] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the control method of the air-conditioning device provided by each of the above methods, including: receiving a working instruction to control entry into the anti-freezing mode, and obtaining the anti-freezing component in the air-conditioning device; controlling and adjusting the working state of the outdoor unit according to the anti-freezing component; wherein, the anti-freezing component includes a first intermediate heat exchange component 41 and a second intermediate heat exchange component 42.

[0161] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0162] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. An air conditioning device, characterized in that, Comprising: An outdoor unit, including a compressor, a four-way valve, an outdoor heat exchange component, a first intermediate heat exchange component, and a second intermediate heat exchange component connected by refrigerant pipes; wherein, the refrigerant pipes include a main refrigerant path, a first branch, and a second branch, the first branch and the second branch are connected in parallel with each other and both communicate with the main refrigerant path, and the first intermediate heat exchange component and the second intermediate heat exchange component are respectively provided on the first branch and the second branch, a first valve is provided on the first branch, a second valve is provided on the second branch, and the outdoor heat exchange component is provided on the main refrigerant path; Wherein, the refrigerant pipes further include a third branch, one end of the third branch is connected to a part of the main refrigerant path located between the four-way valve and the outdoor heat exchange component, the other end of the third branch is connected to the second branch, and a third valve is further provided on the third branch; and a fourth valve is further provided on a part of the second branch between the main refrigerant path and the third branch; A plurality of indoor units, each indoor unit includes an indoor heat exchange component connected by a water pipe, and the water pipe of each indoor unit can selectively flow through the first intermediate heat exchange component or the second intermediate heat exchange component; A control device, including an acquisition module and a control module, after the control device receives a working instruction to enter the anti-freezing mode, the acquisition device is used to acquire the anti-freezing components in the air-conditioning equipment; the control module is used to control and adjust the working state of the outdoor unit according to the anti-freezing components; Wherein, the anti-freezing components include the first intermediate heat exchange component and the second intermediate heat exchange component.

2. The air conditioning device according to claim 1, wherein The heat exchange capacity of the first intermediate heat exchange component is greater than or equal to the heat exchange capacity of the second intermediate heat exchange component.

3. The air conditioning equipment according to claim 2, characterized in that, The control module includes a first control module, and the first control module is specifically used for: When the anti-freezing component is the first intermediate heat exchange component, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange component to operate in heating mode and the second intermediate heat exchange component to operate in cooling mode.

4. The air-conditioning equipment according to claim 2, wherein, The control module includes a second control module, and the second control module is specifically used for: When the anti-freezing component is the second intermediate heat exchange component, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange component to operate in cooling mode and the second intermediate heat exchange component to operate in heating mode.

5. The air-conditioning equipment according to claim 1, characterized in that, The refrigerant pipes further include a fourth branch, the fourth branch is connected in parallel with both the first intermediate heat exchange component and the second intermediate heat exchange component, and a fifth valve is provided on the fourth branch.

6. The air conditioning device according to claim 5, characterized in that, The control module includes a third control module, and the third control module is specifically used for: When the anti-freezing component is the first intermediate heat exchange component and / or the second intermediate heat exchange component, control the first valve and / or the second valve and the fourth valve to open, and control the third valve and the fifth valve to close, and control the first intermediate heat exchange component and / or the second intermediate heat exchange component to operate in heating mode.

7. The air-conditioning equipment according to any one of claims 1 to 6, characterized in that, In the obtaining module, the step of obtaining the anti-freezing component in the air-conditioning device specifically includes: Obtain the temperatures of the first intermediate heat exchange component and the second intermediate heat exchange component; When the temperature of the first intermediate heat exchange component is lower than the set freezing temperature, determine that the anti-freezing component is the first intermediate heat exchange component; Or, when the temperature of the second intermediate heat exchange component is lower than the set freezing temperature, determine that the anti-freezing component is the second intermediate heat exchange component; Or, when the temperatures of both the first intermediate heat exchange component and the second intermediate heat exchange component are lower than the set freezing temperature, determine that the anti-freezing components are the first intermediate heat exchange component and the second intermediate heat exchange component.

8. The air-conditioning equipment according to any one of claims 1 to 6, characterized in that The outdoor heat exchange component includes a first outdoor heat exchange device and a second outdoor heat exchange device. The refrigerant pipeline further includes a fifth branch and a sixth branch connected in parallel with each other. Both ends of the fifth branch and the sixth branch are connected to the refrigerant main path. The first outdoor heat exchange device and the second outdoor heat exchange device are respectively arranged on the fifth branch and the sixth branch.

9. The air-conditioning device according to claim 8, characterized in that, It further includes a first outdoor three-way valve and a second outdoor three-way valve. The first interface of the first outdoor three-way valve is sequentially connected to the exhaust port of the compressor through the fifth branch and the refrigerant main path. The second interface is connected to the first outdoor heat exchange device through the fifth branch. The third interface is connected to the suction port of the compressor through the seventh branch; The first interface of the second outdoor three-way valve is sequentially connected to the exhaust port of the compressor through the sixth branch and the refrigerant main path. The second interface is connected to the second outdoor heat exchange device through the sixth branch. The third interface is connected to the suction port of the compressor through the eighth branch.

10. A control method for an air conditioning device according to any one of claims 1 to 9, characterized in that, It includes: Receive a working instruction to control entry into the anti-freezing mode, and obtain the anti-freezing component in the air-conditioning device; Control and adjust the working state of the outdoor unit according to the anti-freezing component; Wherein, the anti-freezing component includes a first intermediate heat exchange component and a second intermediate heat exchange component.

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