Mode reversing component and air conditioning equipment

Abstract

The utility model relates to a mode reversing component and air conditioning equipment. The mode reversing component comprises a reversing body, and a first outlet pipe, a second outlet pipe and a third outlet pipe are arranged on the reversing body; the cut-off assembly is used for cutting off the first outlet pipe and conducting the second outlet pipe under the condition that main body blow-by occurs in a refrigeration mode; under the condition that main body blow-by occurs in the heating mode, the second outlet pipe is cut off, and the first outlet pipe is conducted; the bypass pipe group is used for communicating the first outlet pipe with the third outlet pipe under the condition that main body blow-by occurs in a refrigeration mode; and under the condition that main body blow-by occurs in the heating mode, the second outlet pipe is communicated with the third outlet pipe. When blow-by occurs, mode switching is completed through the matched cut-off assembly and the bypass pipe set, normal heating and refrigeration of the air conditioner equipment are guaranteed, shutdown caused by system faults is avoided, the maintenance cost and influences are reduced, damage to core components in an air conditioner such as a compressor is avoided, and the service life of the air conditioner equipment is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning equipment, and in particular to a mode reversing component and air-conditioning equipment. Background Art

[0002] With the improvement of economic level, air conditioners have gradually become essential household appliances in people's lives. Four-way valves are commonly used as reversing components in air conditioners to switch between heating and cooling modes, ensuring the flow of refrigerant in different operating modes.

[0003] In traditional technology, the four-way valve is a pressure-differential driven valve that relies on the pressure difference at both ends of the piston to push the piston to achieve reversal. Therefore, when reversing, it is necessary to ensure that there is a sufficient pressure difference at both ends of the piston to overcome the friction resistance of the slide valve. When the system pressure difference is insufficient, the four-way valve will not reverse or the slider will not be able to slide completely to the designed position, resulting in cross-flow. In addition, as the length of use increases, the internal components of the four-way valve will age and become loosely sealed, allowing impurities to enter, which may also affect the reversal and cause cross-flow. The cross-flow phenomenon is that the refrigerant on the high-pressure side and the low-pressure side are interconnected. This interconnection will cause the refrigerant to be unable to condense and evaporate normally, which not only affects the heating and cooling effects of the air-conditioning equipment, but is more likely to cause damage to the equipment if it is in a cross-flow state for a long time. Utility Model Content

[0004] Based on this, it is necessary to provide a mode reversing component and air-conditioning equipment to address the technical problem of air blowby in the four-way valve of the above-mentioned air-conditioning equipment.

[0005] A mode switching component, comprising:

[0006] A reversing body, wherein the reversing body is provided with a first outlet pipe, a second outlet pipe and a third outlet pipe;

[0007] A cut-off assembly, configured to cut off the first outlet pipe and connect the second outlet pipe when cross-flow occurs in the cooling mode; and to cut off the second outlet pipe and connect the first outlet pipe when cross-flow occurs in the heating mode;

[0008] The bypass pipe group is used to connect the first outlet pipe with the third outlet pipe when main body cross-flow occurs in cooling mode; and to connect the second outlet pipe with the third outlet pipe when main body cross-flow occurs in heating mode.

[0009] In one embodiment, the bypass pipe group includes:

[0010] a first bypass pipe, used to connect the first outlet pipe and the third outlet pipe; a first regulator is provided on the first bypass pipe, used to control the conduction and disconnection of the first bypass pipe;

[0011] The second bypass pipe is used to connect the second outlet pipe and the third outlet pipe. The second bypass pipe is provided with a second regulator for controlling the conduction and disconnection of the second bypass pipe.

[0012] In one embodiment, the first regulator is any one of a solenoid valve, an electric ball valve and an electronic expansion valve, and the second regulator is any one of a solenoid valve, an electric ball valve and an electronic expansion valve.

[0013] In one embodiment, the truncation component includes:

[0014] A first cutoff device is provided between the main body outlet end of the first outlet pipe and the connection point of the bypass pipe;

[0015] The second cutoff device is arranged between the main body outlet end of the second outlet pipe and the connection point of the bypass pipe.

[0016] In one embodiment, the first cutoff device is any one of a solenoid valve, an electric ball valve and an electronic expansion valve, and the second cutoff device is any one of a solenoid valve, an electric ball valve and an electronic expansion valve.

[0017] In one embodiment, it further includes:

[0018] The third cutoff device is used to cut off the communication between the main body outlet end of the third outlet pipe and the bypass pipe connection point when gas cross-flow occurs in the main body.

[0019] In one embodiment, the reversing body is further provided with an inlet pipe, and the reversing body includes a coil, a valve cavity and a pilot valve core;

[0020] The pilot valve core is controlled by the coil to slide in the valve cavity, thereby realizing the communication between the inlet pipe and the first outlet pipe, and the second outlet pipe and the third outlet pipe, respectively, or realizing the communication between the inlet pipe and the second outlet pipe, and the first outlet pipe and the third outlet pipe, respectively.

[0021] In one embodiment, an air conditioning device is provided, comprising the mode reversing component as described above.

[0022] In one embodiment, the air-conditioning equipment further includes a compressor, an indoor heat exchanger and an outdoor heat exchanger, the exhaust pipe of the compressor is connected to the inlet pipe of the mode reversing component, the first outlet pipe of the mode reversing component is connected to the indoor heat exchanger, the second outlet pipe of the mode reversing component is connected to the outdoor heat exchanger, and the third outlet pipe of the mode reversing component is connected to the intake pipe of the compressor.

[0023] In one embodiment, the exhaust pipe of the compressor is provided with a high-pressure sensor for detecting the high-pressure side pressure data of the compressor, and the intake pipe of the compressor is provided with a low-pressure sensor for detecting the low-pressure side pressure data of the compressor.

[0024] The above-mentioned mode reversing component and air-conditioning equipment include a reversing body, on which a first outlet pipe, a second outlet pipe and a third outlet pipe are provided; a cut-off assembly is further provided for cutting off the first outlet pipe and connecting the second outlet pipe when a cross-flow occurs in the cooling mode; and for cutting off the second outlet pipe and connecting the first outlet pipe when a cross-flow occurs in the heating mode; and a bypass pipe group is provided for connecting the first outlet pipe with the third outlet pipe when a cross-flow occurs in the cooling mode; and for connecting the second outlet pipe with the third outlet pipe when a cross-flow occurs in the heating mode. In the event of cross-flow in the four-way valve, the reversing control during mode switching is completed by the cut-off assembly and the bypass pipe group provided outside the main body, thereby ensuring normal heating and cooling of the air-conditioning equipment, avoiding shutdown caused by system failure caused by cross-flow, reducing maintenance costs and impacts, and at the same time avoiding damage to the core components of the air-conditioning system such as the compressor, thereby extending the service life of the air-conditioning equipment and solving the technical problem that the four-way valve is in a cross-flow state for a long time and damages the working performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of a system block diagram of a mode switching component in one embodiment;

[0027] Figure 2 A schematic diagram of the refrigerant flow in the mode reversing component in the cooling mode in one embodiment;

[0028] Figure 3 A schematic diagram of the refrigerant flow in the mode reversing component in the heating mode in one embodiment;

[0029] Figure 4 Schematic diagram of the structure of a mode reversing component in one embodiment;

[0030] Figure 5 A schematic diagram of the refrigerant flow in the mode reversing component during normal cooling operation in one embodiment;

[0031] Figure 6A schematic diagram of the refrigerant flow in the mode reversing component during normal heating operation in one embodiment;

[0032] Figure 7 A schematic diagram of the refrigerant flow direction in the mode reversing component when cross-flow occurs in the cooling mode in one embodiment;

[0033] Figure 8 A schematic diagram of the refrigerant flow direction in the mode reversing component when cross-flow occurs in the heating mode in one embodiment;

[0034] Figure 9 A schematic structural diagram of a mode reversing component in another embodiment;

[0035] Figure 10 A schematic diagram of a system block diagram of an air-conditioning device in one embodiment;

[0036] Figure 11 A schematic structural diagram of an air-conditioning device in one embodiment;

[0037] Figure 12 FIG. 1 is an operation flow chart of an air-conditioning device in one embodiment. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0039] As described in the background, if the four-way valve inside the air conditioner fails to reverse or the slider cannot slide completely to the designed position, cross-flow will occur. Furthermore, as the valve's internal components age over time, they may become loosely sealed, allowing impurities to enter. This can also affect reversal and cause cross-flow. Cross-flow occurs when the refrigerant on the high-pressure and low-pressure sides of the valve intercommunicates. This intercommunication prevents the refrigerant from condensing and evaporating properly, affecting both the heating and cooling performance of the air conditioner. Prolonged cross-flow can also damage the equipment.

[0040] In the related art, most of them use parameters to determine whether there is cross-flow in the four-way valve. If cross-flow is determined to have occurred, the system will be shut down for protection, and a fault code will be displayed to prompt the user to replace the four-way valve. However, due to the high cost of replacing the four-way valve and the need to recycle the refrigerant during the replacement process, a large amount of refrigerant will inevitably be lost, resulting in high economic costs. In addition, it usually takes a certain amount of time for the shutdown protection to be completed until the maintenance is completed, which will affect the normal use of the air conditioner during this period, especially in important air conditioning use occasions, where the shutdown protection has a significant impact.

[0041] Based on this, the present application provides a mode reversing component, which improves the connection method of the three outlet pipes on the basic four-way valve structure, so that when the basic four-way valve has a cross-flow phenomenon, it can work through the matching cut-off component and bypass pipe group to ensure the normal heating and cooling of the air-conditioning equipment, avoid the shutdown caused by system failure caused by cross-flow, reduce maintenance costs and impacts, and at the same time avoid damage to the core components inside the air conditioner such as the compressor, extend the service life of the air-conditioning equipment, and solve the technical problem that the four-way valve is in a cross-flow state for a long time and damages the working performance of the compressor.

[0042] In an exemplary embodiment, Figure 1 As shown, a mode reversing component 100 is provided, including: a reversing body 110, on which a first outlet pipe, a second outlet pipe and a third outlet pipe are provided; a cut-off assembly 120, which is used to cut off the first outlet pipe and connect the second outlet pipe when main body cross-flow occurs in cooling mode; cut off the second outlet pipe and connect the first outlet pipe when main body cross-flow occurs in heating mode; a bypass pipe group 130, which is used to connect the first outlet pipe with the third outlet pipe when main body cross-flow occurs in cooling mode; and connect the second outlet pipe with the third outlet pipe when main body cross-flow occurs in heating mode.

[0043] It can be understood that the reversing body 110 is a basic four-way valve, which is used to complete the switching between the cooling mode and the heating mode of the air-conditioning device by reversing before the main body of the air-conditioning device has air leakage.

[0044] In order to switch between the cooling mode and the heating mode of the air conditioner, an inlet pipe, a first outlet pipe, a second outlet pipe and a third outlet pipe are provided on the reversing body 110. Specifically, the connection relationship between the inlet pipe and each outlet pipe and other components of the air conditioner is not limited and can be determined according to the actual product design. Figure 1 , this application is explained using the following connection relationship as an example. The inlet pipe can be set to be D pipe, which is used to connect with the exhaust pipe of the compressor of the air-conditioning equipment; the first outlet pipe is E pipe, which is used to connect with the indoor heat exchanger of the air-conditioning equipment; the second outlet pipe is C pipe, which is used to connect with the outdoor heat exchanger of the air-conditioning equipment; the third outlet pipe is S pipe, which is used to connect with the suction pipe of the compressor.

[0045] Exemplarily, the reversing body 110 may include a coil, a valve cavity and a pilot valve core (the internal structure of the reversing body is not shown in the accompanying drawings). The pilot valve core is controlled by the coil to slide in the valve cavity to achieve separate connection between the inlet pipe (D pipe) and the first outlet pipe (E pipe), the second outlet pipe (C pipe) and the third outlet pipe (S pipe), or to achieve separate connection between the inlet pipe (D pipe) and the second outlet pipe (C pipe), the first outlet pipe (E pipe) and the third outlet pipe (S pipe).

[0046] Based on the connection relationship between the inlet pipe and each outlet pipe and other components of the air-conditioning equipment described in the above example, the specific working process of the reversing body 110 is introduced:

[0047] When the air conditioner switches to cooling mode, the control coil is first de-energized. The pilot valve core, activated by its elastic return structure, moves from one end of the valve chamber to the other, connecting the inlet pipe (D) to the second outlet pipe (C) and the first outlet pipe (E) to the third outlet pipe (S). At this point, refrigerant from the compressor's discharge pipe flows from the inlet pipe (D) through the second outlet pipe (C) to the outdoor heat exchanger. After condensation in the outdoor heat exchanger, it passes through the indoor heat exchanger to cool the indoor environment. The refrigerant then flows back to the compressor's suction pipe through the first outlet pipe (E) and the third outlet pipe (S).

[0048] When switching to heating mode, the air conditioner first energizes the control coil. The pilot valve core, attracted by electromagnetic force, moves from one end of the valve chamber to the other, connecting the inlet pipe (D) to the first outlet pipe (E) and the second outlet pipe (C) to the third outlet pipe (S). At this point, refrigerant from the compressor's discharge pipe flows from the inlet pipe (D) through the first outlet pipe (E) to the indoor heat exchanger, heating the indoor environment. It then flows into the outdoor heat exchanger for evaporation. The evaporated refrigerant then flows back to the compressor's suction pipe through the second outlet pipe (C) and the third outlet pipe (S).

[0049] It can be understood that when the reversing body 110 has a cross-flow phenomenon due to internal component failure or aging, the inlet pipe (D pipe), the first outlet pipe (E pipe) and the second outlet pipe (C pipe) will be connected at the same time, and the refrigerant on the high-pressure side output by the exhaust pipe of the compressor will be interconnected with the indoor heat exchanger and the outdoor heat exchanger at the same time, resulting in the refrigerant being unable to condense and evaporate normally.

[0050] Specifically, shutoff assembly 120 is used to shut off the outlet pipe that should not be connected to the inlet pipe (D pipe) in the event of cross-flow between the main unit and the compressor, while keeping the outlet pipe that should be connected to the inlet pipe (D pipe) unobstructed. After shutoff assembly 120 shuts off the outlet pipe that should not be connected to the inlet pipe (D pipe), refrigerant that should originally flow back to the compressor's suction pipe through the shutoff pipe and the third outlet pipe (S pipe) will be unable to flow properly. Furthermore, this embodiment of the present application adds a bypass pipe assembly 130 to ensure smooth refrigerant flow back to the compressor's suction pipe.

[0051] Correspondingly, refer to Figure 2In cooling mode, the second outlet pipe (tube C) should be connected to the inlet pipe (tube D) to allow refrigerant from the compressor exhaust pipe to flow into the outdoor heat exchanger for condensation. Furthermore, if cross-flow occurs in cooling mode, the shutoff assembly 120 must shut off the first outlet pipe (tube E) to prevent high-pressure refrigerant from flowing into the indoor heat exchanger, potentially preventing the air conditioner from cooling. Simultaneously, the shutoff assembly 120 must open the second outlet pipe (tube C) to ensure smooth flow of high-pressure refrigerant into the outdoor heat exchanger for condensation.

[0052] Continue to refer to Figure 2 In cooling mode, the bypass pipe group 130 is used to connect the cut-off first outlet pipe (E pipe) with the third outlet pipe (S pipe), so that the refrigerant flowing back from the indoor heat exchanger through the first outlet pipe (E pipe) can flow smoothly into the third outlet pipe (S pipe) through the bypass pipe group 130 and then return to the suction pipe of the compressor.

[0053] In addition, refer to Figure 3 In heating mode, the first outlet pipe (tube E) should be connected to the inlet pipe (tube D) to allow refrigerant from the compressor exhaust pipe to flow into the indoor heat exchanger, heating the room. Furthermore, if cross-flow occurs in heating mode, shutoff assembly 120 must shut off the second outlet pipe (tube C) to prevent high-pressure refrigerant from flowing into the outdoor heat exchanger, preventing heating. Simultaneously, shutoff assembly 120 must open the first outlet pipe (tube E) to ensure smooth flow of high-pressure refrigerant into the indoor heat exchanger, heating the room.

[0054] Continue to refer to Figure 3 In heating mode, the bypass pipe group 130 is used to connect the cut-off second outlet pipe (C pipe) with the third outlet pipe (S pipe), so that the refrigerant flowing back from the outdoor heat exchanger through the second outlet pipe (C pipe) can flow smoothly into the third outlet pipe (S pipe) through the bypass pipe group 130 and then return to the suction pipe of the compressor.

[0055] Furthermore, it should be noted that before cross-flow occurs in the reversing body 110, the shutoff assembly 120 does not shut off either the first outlet pipe (E pipe) or the second outlet pipe (C pipe), maintaining both pipes unobstructed to ensure normal reversing of the reversing body 110. Simultaneously, the bypass pipe assembly 130 is also inoperative, and the third outlet pipe (S pipe) remains connected to the other outlet pipes through the reversing body 110, achieving normal reversing.

[0056] The above-mentioned mode reversing component improves the connection method of the three outlet pipes on the basic four-way valve structure, so that when the basic four-way valve has a cross-flow phenomenon, it can work through the matching cut-off component and bypass pipe group to ensure the normal heating and cooling of the air-conditioning equipment, avoid the shutdown caused by system failure caused by cross-flow, reduce maintenance costs and impacts, and at the same time avoid damage to the core components inside the air conditioner such as the compressor, extend the service life of the air-conditioning equipment, and solve the technical problem that the four-way valve is in a cross-flow state for a long time and damages the working performance of the compressor.

[0057] It should be noted that the specific structure of the reversing body 110 in the above example and the introduction to the working process based on the structure can be understood as an explanation of the reversing body 110. The reversing body 110 can also be other structures familiar to those skilled in the art, and can be improved through the cut-off component and bypass pipe group provided in the embodiments of the present application, as long as it can be ensured that the cut-off component and bypass pipe group can still work after the cross-flow phenomenon occurs.

[0058] In an exemplary embodiment, Figure 4 As shown, the bypass pipe group 130 includes: a first bypass pipe, which is used to connect the first outlet pipe (E pipe) and the third outlet pipe (S pipe), and a first regulator 131 is provided on the first bypass pipe to control the conduction and disconnection of the first bypass pipe; a second bypass pipe, which is used to connect the second outlet pipe (C pipe) and the third outlet pipe (S pipe), and a second regulator 132 is provided on the second bypass pipe to control the conduction and disconnection of the second bypass pipe.

[0059] Specifically, the first bypass pipe connects the first outlet pipe (E pipe) and the third outlet pipe (S pipe) in the event of cross-contamination with the main unit. This allows refrigerant returning from the indoor heat exchanger through the first outlet pipe (E pipe) to the compressor's suction pipe via the third outlet pipe (S pipe). A first regulator 131, installed on the first bypass pipe, opens the first bypass pipe in the event of cross-contamination with the main unit and maintains its open state in the absence of cross-contamination.

[0060] Furthermore, the second bypass pipe is used to connect the second outlet pipe (C pipe) and the third outlet pipe (S pipe) in the event of cross-contamination with the main unit. This allows refrigerant returning from the outdoor heat exchanger through the second outlet pipe (C pipe) to return to the compressor's suction pipe via the third outlet pipe (S pipe). A second regulator 132, provided on the second bypass pipe, is used to open the second bypass pipe in the event of cross-contamination with the main unit and to maintain the second bypass pipe in a closed state in the absence of cross-contamination with the main unit.

[0061] In an exemplary embodiment, referring to Figure 4The cut-off assembly 120 includes: a first cutoff 121, which is arranged between the main body outlet end of the first outlet pipe (E pipe) and the bypass pipe connection point; and a second cutoff 122, which is arranged between the main body outlet end of the second outlet pipe (C pipe) and the bypass pipe connection point.

[0062] The main body outlet end of the first outlet pipe (E pipe) is the port where the first outlet pipe (E pipe) connects to the reversing body 110. The bypass pipe connection point of the first outlet pipe (E pipe) is the node where the first outlet pipe (E pipe) and the first bypass pipe connect. Correspondingly, the main body outlet end of the second outlet pipe (C pipe) is the port where the second outlet pipe (C pipe) connects to the reversing body 110. The bypass pipe connection point of the second outlet pipe (C pipe) is the node where the second outlet pipe (C pipe) and the second bypass pipe connect.

[0063] It can be understood that a first cutoff 121 is provided on the first outlet pipe (E pipe) on the pipe section between the reversing body 110 and the first bypass pipe, and a second cutoff 122 is provided on the second outlet pipe (C pipe) on the pipe section between the reversing body 110 and the second bypass pipe. This ensures that after the cutoff is cut off, the first outlet pipe (E pipe) can still be smoothly connected to the third outlet pipe (S pipe) through the first bypass pipe, and the second outlet pipe (C pipe) can still be smoothly connected to the third outlet pipe (S pipe) through the second bypass pipe.

[0064] For example, the first regulator 131, the second regulator 132, the first cutoff 121, and the second cutoff 122 are all valve devices capable of opening and closing the pipeline. The specific device type that can be used is not fixed, and for example, any of a solenoid valve, an electric ball valve, and an electronic expansion valve can be used. In the embodiment of the present application, the first regulator 131, the second regulator 132, the first cutoff 121, and the second cutoff 122 can all be implemented using solenoid valves.

[0065] The following Figure 4 The working process of the mode reversing component is explained as follows:

[0066] Please refer to Figure 5 and Figure 6 When no cross-flow occurs, the first regulator 131 and the second regulator 132 are both disconnected, keeping the first bypass pipe and the second bypass pipe disconnected. The first blocker 121 and the second blocker 122 are both connected to ensure normal heating and cooling functions through the reversing body 110.

[0067] Continue to refer to Figure 5When the air conditioner switches to cooling mode, the control coil is first de-energized. The pilot valve core, activated by its elastic recovery mechanism, slides from one end of the valve chamber to the other, connecting the inlet pipe (D) to the second outlet pipe (C) and the first outlet pipe (E) to the third outlet pipe (S). At this point, refrigerant from the compressor's exhaust pipe flows from the inlet pipe (D) through the second outlet pipe (C) to the outdoor heat exchanger. After condensation in the outdoor heat exchanger, it passes through the indoor heat exchanger to cool the indoor environment. The refrigerant then flows back to the compressor's suction pipe through the first outlet pipe (E) and the third outlet pipe (S).

[0068] Continue to refer to Figure 6 When switching to heating mode, the air conditioner first energizes the control coil. The pilot valve core, attracted by electromagnetic force, moves from one end of the valve chamber to the other, connecting the inlet pipe (D) to the first outlet pipe (E) and the second outlet pipe (C) to the third outlet pipe (S). At this point, the refrigerant from the compressor's exhaust pipe flows from the inlet pipe (D) through the first outlet pipe (E) to the indoor heat exchanger, heating the indoor environment. It then flows into the outdoor heat exchanger for evaporation. The evaporated refrigerant then flows back to the compressor's suction pipe through the second outlet pipe (C) and the third outlet pipe (S).

[0069] Please refer to Figure 7 In cooling mode, if cross-contamination occurs, the first regulator 131 must be switched on to open the first bypass pipe. Simultaneously, the first blocker 121 must be switched off to prevent high-pressure refrigerant flowing from the inlet pipe (pipe D) from flowing into the indoor heat exchanger via the first outlet pipe (pipe E). The second regulator 132 remains off, and the second blocker 122 remains on. At this point, refrigerant from the compressor's discharge pipe continues to flow from the inlet pipe (pipe D) through the second outlet pipe (pipe C) to the outdoor heat exchanger, where it condenses and then cools the indoor environment through the indoor heat exchanger. However, refrigerant flowing into the indoor heat exchanger will flow back into the compressor's suction pipe via the first outlet pipe (pipe E), the first bypass pipe, and the third outlet pipe (pipe S).

[0070] Please refer to Figure 8In heating mode, if cross-contamination occurs, the second regulator 132 must be switched on to open the second bypass pipe. Simultaneously, the second blocker 122 must be switched off to prevent high-pressure refrigerant flowing from the inlet pipe (pipe D) from flowing into the outdoor heat exchanger via the second outlet pipe (pipe C). The first regulator 131 remains off, and the first blocker 121 remains on. At this point, refrigerant from the compressor's discharge pipe continues to flow from the inlet pipe (pipe D) through the first outlet pipe (pipe E) to the indoor heat exchanger, heating the indoor environment. It then flows into the outdoor heat exchanger for evaporation. The evaporated refrigerant then flows back to the compressor's suction pipe via the second outlet pipe (pipe C), the second bypass pipe, and the third outlet pipe (pipe S).

[0071] It can be understood that in some design structures of the reversing body 110, if cross-flow occurs, while the inlet pipe (D pipe), the first outlet pipe (E pipe) and the second outlet pipe (C pipe) are interconnected, the first outlet pipe (E pipe) and the second outlet pipe (C pipe) may further be interconnected with the third outlet pipe (S pipe), resulting in the refrigerant on the high-pressure side and the refrigerant on the low-pressure side being completely interconnected, which will more seriously affect the normal operation of the air-conditioning equipment.

[0072] Furthermore, in an exemplary embodiment, Figure 9 As shown, the mode reversing component further includes: a third cutoff 123 for cutting off the communication between the main body outlet end of the third outlet pipe (S pipe) and the bypass pipe connection point when cross-flow of the main body occurs.

[0073] Specifically, when cross-contamination does not occur, the third cutoff 123 remains in an open state to ensure normal heating and cooling functions through the reversing body 110. However, if cross-contamination does occur, the third cutoff 123 must be switched to an open state and remain in this state during the cross-contamination period to prevent high-pressure refrigerant received by the first outlet pipe (E pipe) or the second outlet pipe (C pipe) from entering the compressor's suction pipe through the third outlet pipe (S pipe).

[0074] In an exemplary embodiment, Figure 10 As shown, the present application provides an air conditioning device, including the mode reversing component 100 as described in any of the above embodiments. It can be understood that the mode reversing component 100 is used to complete the switching of the cooling mode and the heating mode of the air conditioning device by reversing.

[0075] For example, continue to refer to Figure 10In addition to the mode reversing component, the air conditioning equipment also includes a compressor 200, an indoor heat exchanger 300, and an outdoor heat exchanger 400. The exhaust pipe of the compressor 200 is connected to the inlet pipe (D pipe) of the mode reversing component 100, the first outlet pipe (E pipe) of the mode reversing component 100 is connected to the indoor heat exchanger 300, the second outlet pipe (C pipe) of the mode reversing component 100 is connected to the outdoor heat exchanger 400, and the third outlet pipe (S pipe) of the mode reversing component 100 is connected to the suction pipe of the compressor 200.

[0076] The mode reversing component 100 implements the working process of switching the operating mode of the air-conditioning equipment when cross-flow occurs or not. Please refer to the description of the mode reversing component above and will not be repeated here.

[0077] In an exemplary embodiment, referring to Figure 11 The exhaust pipe of the compressor 200 is provided with a high-pressure sensor for detecting the high-pressure side pressure data of the compressor, and the intake pipe of the compressor is provided with a low-pressure sensor for detecting the low-pressure side pressure data of the compressor.

[0078] Specifically, the high-pressure side pressure data PH represents the pressure value on the exhaust pipe side of the compressor, and the low-pressure side pressure data PL represents the pressure value on the intake pipe side of the compressor. It is understood that to facilitate parameter determination by the air conditioning equipment controller, the refrigerant's saturation temperature is typically used in place of the aforementioned pressure values for calculation and determination. Furthermore, the high-pressure side pressure data PH is represented by the saturation temperature value corresponding to the high-pressure pressure value, while the low-pressure side pressure data PL is represented by the saturation temperature value corresponding to the low-pressure pressure value. The conversion between pressure values and saturation temperatures can be obtained using a temperature-pressure correspondence table.

[0079] For example, the air conditioner may further include a controller. The controller may be connected to the mode switching component to determine whether crosstalk has occurred within the switching body, and to control the operation of the bypass pipe assembly and the shutoff assembly if crosstalk has occurred. The controller may also be connected to other components within the air conditioner to control the operating status of each component within the air conditioner.

[0080] It is understood that the controller is the control center of the air conditioner. It can be a control chip or control circuit board installed in the air conditioner body, or it can be an external control system implemented through wireless communication. The external control system can be implemented through devices such as terminals or servers. Terminals can include, but are not limited to, various personal computers, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers and smart car devices. Portable wearable devices can include smart watches and smart bracelets. The server can be implemented as a standalone server or a server cluster consisting of multiple servers.

[0081] In conjunction with the above embodiments, in an exemplary embodiment, a method for controlling an air conditioning device is provided for controlling the air conditioning device of any of the above embodiments, and can be specifically applied to the controller of the above air conditioning device. The method includes steps 202 to 206, wherein:

[0082] Step 202: Obtain low-pressure side pressure data and high-pressure side pressure data of the compressor.

[0083] Understandably, when cross-flow occurs in four-way valves in air conditioning equipment, temperature regulation, such as cooling and heating, will significantly deteriorate. The high-pressure pressure and exhaust temperature after compression will be higher than normal, seriously affecting compressor performance. Therefore, comparing the compressor's discharge and intake pressures can be used to determine if cross-flow is occurring.

[0084] Specifically, the high-pressure sensor installed in the compressor's exhaust pipe can first detect the high-pressure side pressure data of the compressor, and at the same time, the low-pressure sensor installed in the compressor's intake pipe can detect the low-pressure side pressure data of the compressor. This allows the controller to determine whether the air conditioner has experienced main body cross-flow of the mode reversing component.

[0085] Among them, the controller may be to obtain the low-pressure side pressure data and high-pressure side pressure data of the compressor after the air-conditioning equipment is started and operated, so as to determine whether main body cross-gas has occurred. It should be noted that when the air-conditioning equipment is in the oil return or defrost period, the controller does not judge whether main body cross-gas has occurred. Because the oil return or defrost period belongs to the special operating mode of the air-conditioning equipment, the state of the refrigerant during this period is different from the conventional cooling and heating mode. Therefore, the controller may also start to obtain the low-pressure side pressure data and high-pressure side pressure data of the compressor after the preset stable time period of the oil return or defrost mode ends, so as to determine whether main body cross-gas has occurred. Among them, the value of the preset stable time period is not fixed and can be determined according to actual technical requirements. For example, the present embodiment can be set to 10 minutes.

[0086] Step 204: When it is determined based on the low-pressure side pressure data and the high-pressure side pressure data that main air cross-talk occurs, the current air-conditioning operation mode is determined.

[0087] Specifically, the four-way valve based on the air-conditioning equipment is a pressure difference driven valve, and its inlet pipe and one of the outlet pipes are respectively connected to the exhaust side and the intake side of the compressor. Then, the low-pressure side pressure data and the high-pressure side pressure data can be used to determine whether the compressor can normally establish the pressure difference, and to determine whether the reversing body of the mode reversing component has main body cross-flow.

[0088] It is understood that whether the compressor can normally establish a pressure differential can be determined by determining whether the pressure difference between the low-pressure side pressure data and the high-pressure side pressure data is greater than a certain pressure difference value. Correspondingly, for example, determining whether main body cross-flow has occurred based on the low-pressure side pressure data and the high-pressure side pressure data in step 204 includes: determining that main body cross-flow has occurred when the difference between the low-pressure side pressure data and the high-pressure side pressure data is less than a preset difference value.

[0089] The preset differential value can be obtained in advance through experiments. If the pressure difference between the suction and exhaust sides of the compressor is less than the preset differential value, it indicates that the compressor cannot normally establish a pressure differential. The value of the preset differential value is not fixed and can be set according to actual technical requirements. For example, in the embodiment of the present application, it is determined to be 5°C based on experiments.

[0090] Exemplarily, determining whether main body cross-flow occurs based on the low-pressure side pressure data and the high-pressure side pressure data in step 204 includes: determining that main body cross-flow occurs when the difference between the low-pressure side pressure data and the high-pressure side pressure data is less than a preset difference and the duration exceeds a preset duration.

[0091] Specifically, a timer may be started when the difference between the low-pressure side and high-pressure side pressure data is initially detected to be less than a preset difference. If the duration of this timer reaches the preset duration, it is determined that the compressor has been unable to normally establish a pressure differential for a continuous period of time, indicating that cross-flow has occurred in the reversing body of the mode reversing component, with refrigerant on the high-pressure side flowing to the low-pressure side through the reversing body. The preset duration is not fixed and can be determined based on actual technical requirements. For example, in this embodiment, it can be set to 10 minutes.

[0092] Furthermore, when it is determined that main body cross-flow occurs, it is also necessary to determine the operation method of the corresponding control mode reversing component according to the current operating mode of the air-conditioning equipment to ensure that the air-conditioning equipment continues to operate normally in the current operating mode.

[0093] It is understood that the operating modes of commonly used air conditioners may include a heating mode and a cooling mode. Furthermore, the current air conditioner operating mode may be determined based on the current operating state of the reversing body of the mode reversing component; based on the recording of operating parameters by the controller; or based on other related methods, which are not limited in this embodiment.

[0094] Step 206: Control the operation of the mode reversing component based on the current air-conditioning operation mode to ensure the normal operation of the air-conditioning equipment.

[0095] It can be understood that when it is determined that main body cross-flow occurs, the mode reversing component can be controlled to operate based on the determined current air-conditioning operation mode to ensure that the air-conditioning equipment continues to operate normally in the current operation mode.

[0096] Specifically, if cross-flow occurs, the controller must first control the shutoff assembly to cut off the outlet pipe that should not be connected to the inlet pipe (D pipe), while keeping the outlet pipe that should be connected to the inlet pipe (D pipe) open. After the shutoff assembly cuts off the outlet pipe that should not be connected to the inlet pipe (D pipe), the refrigerant that should originally flow back to the compressor's suction pipe through the cutoff pipe and the third outlet pipe (S pipe) will be unable to flow normally. The controller must then control the bypass pipe group to ensure that the refrigerant flows smoothly back to the compressor's suction pipe.

[0097] For example, in cooling mode, the second outlet pipe (tube C) should be connected to the inlet pipe (tube D) to allow refrigerant output from the compressor exhaust pipe to flow into the outdoor heat exchanger for condensation. Furthermore, if cross-flow occurs in cooling mode, the controller must first control the shutoff assembly to shut off the first outlet pipe (tube E) to prevent high-pressure refrigerant from flowing into the indoor heat exchanger, which would cause the air conditioner to fail to cool. Simultaneously, the shutoff assembly must be controlled to open the second outlet pipe (tube C) to ensure smooth flow of high-pressure refrigerant into the outdoor heat exchanger for condensation. Furthermore, the controller must control the bypass pipe assembly to connect the shutoff first outlet pipe (tube E) with the third outlet pipe (tube S). This allows refrigerant flowing back from the indoor heat exchanger through the first outlet pipe (tube E) to flow smoothly through the bypass pipe assembly into the third outlet pipe (tube S) and then back into the compressor's suction pipe.

[0098] In heating mode, the first outlet pipe (E) should be connected to the inlet pipe (D) to allow refrigerant output from the compressor exhaust pipe to flow into the indoor heat exchanger, heating the indoor environment. Furthermore, if cross-flow occurs in heating mode, the controller must control the shutoff assembly to shut off the second outlet pipe (C) to prevent high-pressure refrigerant from flowing into the outdoor heat exchanger, preventing the air conditioner from heating. Simultaneously, the controller must control the shutoff assembly to open the first outlet pipe (E) to ensure smooth flow of high-pressure refrigerant into the indoor heat exchanger, heating the indoor environment. The controller must also control the bypass pipe assembly to connect the shutoff second outlet pipe (C) to the third outlet pipe (S). This allows refrigerant returning from the outdoor heat exchanger through the second outlet pipe (C) to flow smoothly into the third outlet pipe (S) via the bypass pipe assembly 130 and return to the compressor's suction pipe.

[0099] It's important to note that before cross-flow occurs in the reversing body, the controller must control the shutoff assembly to prevent it from shutting off either the first outlet pipe (E) or the second outlet pipe (C), ensuring both remain unobstructed to ensure normal reversing. Simultaneously, the controller must also control the bypass pipe assembly to remain inoperative, ensuring that the third outlet pipe (S) remains connected to the other outlet pipes through the reversing body, ensuring normal reversing.

[0100] In an exemplary embodiment, step 206 includes steps 302 to 304, wherein:

[0101] Step 302: When the current air conditioner operation mode is cooling mode, the first regulator and the second cutoff of the control mode reversing component are turned on, the coil is de-energized, and the second regulator and the second cutoff of the control mode reversing component are turned off.

[0102] It is understood that when no cross-flow occurs in the main body, the first regulator and the second regulator are both in the disconnected state, keeping the first bypass pipe and the second bypass pipe disconnected. The first cutoff and the second cutoff are both in the conducting state to ensure normal heating and cooling functions are achieved through the reversing main body.

[0103] When the air conditioner switches to cooling mode, the controller first de-energizes the coil. The pilot valve core, activated by its elastic return structure, moves from one end of the valve chamber to the other, connecting the inlet pipe (D) to the second outlet pipe (C) and the first outlet pipe (E) to the third outlet pipe (S). At this point, refrigerant from the compressor's discharge pipe flows from the inlet pipe (D) through the second outlet pipe (C) to the outdoor heat exchanger. After condensation in the outdoor heat exchanger, it passes through the indoor heat exchanger to cool the indoor environment. The refrigerant then flows back to the compressor's suction pipe through the first outlet pipe (E) and the third outlet pipe (S).

[0104] Specifically, if cross-flow occurs in cooling mode, the controller first switches the first regulator to the on state, opening the first bypass pipe. Simultaneously, the first shut-off switch is switched off to prevent high-pressure refrigerant flowing from the inlet pipe (pipe D) from flowing into the indoor heat exchanger via the first outlet pipe (pipe E). The second regulator remains off, and the second shut-off switch remains on. At this point, refrigerant from the compressor's discharge pipe continues to flow from the inlet pipe (pipe D) through the second outlet pipe (pipe C) to the outdoor heat exchanger, where it condenses before passing through the indoor heat exchanger to cool the indoor environment. However, refrigerant flowing into the indoor heat exchanger will flow back into the compressor's suction pipe via the first outlet pipe (pipe E), the first bypass pipe, and the third outlet pipe (pipe S).

[0105] Step 304: When the current air conditioner operation mode is the heating mode, the second regulator and the second cutoff of the control mode reversing component are turned on, the coil is energized, and the first regulator and the second cutoff of the control mode reversing component are turned off.

[0106] As you can understand, when the air conditioner switches to heating mode, the control coil is energized. The pilot valve core, attracted by electromagnetic force, moves from one end of the valve chamber to the other, connecting the inlet pipe (D) to the first outlet pipe (E) and the second outlet pipe (C) to the third outlet pipe (S). At this point, the refrigerant from the compressor's exhaust pipe flows from the inlet pipe (D) through the first outlet pipe (E) to the indoor heat exchanger, heating the indoor environment. It then flows into the outdoor heat exchanger for evaporation. The evaporated refrigerant then flows back to the compressor's suction pipe through the second outlet pipe (C) and the third outlet pipe (S).

[0107] Specifically, if cross-flow occurs in heating mode, the second regulator must be switched on to open the second bypass pipe. Simultaneously, the second shutoff must be switched off to prevent high-pressure refrigerant flowing from the inlet pipe (pipe D) from flowing into the outdoor heat exchanger via the second outlet pipe (pipe C). The first regulator remains off, and the first shutoff remains on. At this point, refrigerant from the compressor's discharge pipe continues to flow from the inlet pipe (pipe D) through the first outlet pipe (pipe E) to the indoor heat exchanger, heating the indoor environment. It then flows into the outdoor heat exchanger for evaporation. The evaporated refrigerant then flows back to the compressor's intake pipe via the second outlet pipe (pipe C), the second bypass pipe, and the third outlet pipe (pipe S).

[0108] In an exemplary embodiment, step 206 further includes step 306 : controlling the third interrupter of the mode reversing component to be turned on.

[0109] It is understandable that in the design structure of some reversing bodies, if cross-flow occurs, while the inlet pipe (D pipe), the first outlet pipe (E pipe) and the second outlet pipe (C pipe) are interconnected, the first outlet pipe (E pipe) and the second outlet pipe (C pipe) may further be interconnected with the third outlet pipe (S pipe), resulting in the refrigerant on the high-pressure side and the refrigerant on the low-pressure side being completely interconnected, which will more seriously affect the normal operation of the air-conditioning equipment.

[0110] Specifically, when cross-contamination with the main unit does not occur, the third cutoff valve remains open to ensure normal heating and cooling functions through the reversing main unit. However, if cross-contamination with the main unit occurs, the third cutoff valve must be switched to the open position and remain open during the cross-contamination period to prevent high-pressure refrigerant received by the first outlet pipe (E pipe) or the second outlet pipe (C pipe) from entering the compressor's suction pipe through the third outlet pipe (S pipe).

[0111] It can be understood that the implementation solution to the problem provided by the air-conditioning equipment control method is similar to the implementation solution recorded in the above-mentioned mode reversing component and air-conditioning equipment. Therefore, the specific limitations in one or more air-conditioning equipment control method embodiments provided above can be referred to the above limitations on the mode reversing component and air-conditioning equipment, and will not be repeated here.

[0112] In a specific embodiment, Figure 12 As shown, a method for controlling an air-conditioning device is provided. Figure 11 The air-conditioning equipment shown in the figure is controlled. The specific process is as follows:

[0113] Specifically, after the air conditioner is turned on, or 10 minutes after the oil return or defrost function ends (the oil return and defrost period is a special operating mode, and the refrigerant state is abnormal, so the data during the oil return and defrost period is not collected for judgment. After the end of the period and stable operation for a period of time, the judgment is made). If the difference between the high-pressure side pressure data and the low-pressure side pressure data of the air conditioner is more than 5°C, the air conditioner is considered to be operating normally and is controlled normally. Under normal control, the control status table of each valve body in the mode reversing component is as follows:

[0114] Table 1

[0115]

[0116] If the compressor fails to establish a pressure differential for ten consecutive minutes, that is, the difference between the high-pressure side and the low-pressure side pressure data is less than 5°C, it means that cross-flow has occurred in the four-way valve, and the refrigerant on the high-pressure side is flowing to the low-pressure side. At this time, the controller needs to enter the emergency reversing control state and activate the emergency reversing part in the mode reversing component. The mode reversing component can be controlled through the following control state table:

[0117] Table 2

[0118]

[0119] Furthermore, after the controller of the air-conditioning equipment enters the emergency reversing control state, in order to prevent the mode reversing component from continuing to leak and cross-flow, it is necessary to activate the solenoid valve A valve (first regulator), valve B (second regulator) and the bypass pipeline to conduct or cut off the refrigerant.

[0120] If cross-flow occurs in cooling mode, the controller, as in normal mode, de-energizes the coil of the reversing unit. Refrigerant entering the compressor discharge side flows through valve C (second cutoff) to the outdoor unit heat exchanger for condensation. Valve D (first cutoff) remains closed to prevent cross-flow refrigerant from entering the evaporation side. Refrigerant returning from the indoor unit evaporation side flows through valve A to the suction side.

[0121] If cross-flow occurs in heating mode, the controller will still control the coil of the reversing body to remain energized as in normal mode. At this time, the refrigerant coming in from the exhaust side of the compressor passes through the D valve to the indoor unit heat exchanger for condensation, and the C valve remains closed to prevent the cross-flow refrigerant from entering the outdoor heat exchanger; the refrigerant coming back from the condensing side of the indoor unit flows into the suction side through the B valve, and then passes through the gas-liquid separator into the compressor suction pipe.

[0122] For example, if the air-conditioning equipment still cannot operate normally after the controller enters the emergency reversing control state, and the pressure difference between the exhaust end and the suction end of the compressor still cannot be established, the protection shutdown will prevent damage to the air-conditioning equipment, and a fault prompt message will be issued simultaneously to remind maintenance personnel to repair it.

[0123] In this embodiment, if cross-flow occurs in the reversing body, the controller can activate the emergency reversing control state, without affecting the normal operation of the air conditioner. This prevents system downtime caused by cross-flow, thereby reducing maintenance costs and impacts. Furthermore, the accompanying solenoid valve is low-cost, achieving high efficiency with low investment, extending the service life of the air conditioner and resolving the technical problem of long-term cross-flow of the four-way valve, which can damage the compressor's operating performance.

[0124] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A mode reversing component, characterized in that: include: A reversing body, wherein the reversing body is provided with a first outlet pipe, a second outlet pipe and a third outlet pipe; A cut-off assembly, configured to cut off the first outlet pipe and connect the second outlet pipe when cross-flow occurs in the cooling mode; and to cut off the second outlet pipe and connect the first outlet pipe when cross-flow occurs in the heating mode; The bypass pipe group is used to connect the first outlet pipe with the third outlet pipe when main body cross-flow occurs in cooling mode; and to connect the second outlet pipe with the third outlet pipe when main body cross-flow occurs in heating mode.

2. The mode reversing component according to claim 1, characterized in that: The bypass pipe group includes: a first bypass pipe, used to connect the first outlet pipe and the third outlet pipe; a first regulator is provided on the first bypass pipe, used to control the conduction and disconnection of the first bypass pipe; The second bypass pipe is used to connect the second outlet pipe and the third outlet pipe. The second bypass pipe is provided with a second regulator for controlling the conduction and disconnection of the second bypass pipe.

3. The mode reversing component according to claim 2, characterized in that: The first regulator is any one of a solenoid valve, an electric ball valve and an electronic expansion valve, and the second regulator is any one of a solenoid valve, an electric ball valve and an electronic expansion valve.

4. The mode reversing component according to claim 1, characterized in that: The truncation component includes: A first cutoff device is provided between the main body outlet end of the first outlet pipe and the connection point of the bypass pipe; The second cutoff device is arranged between the main body outlet end of the second outlet pipe and the connection point of the bypass pipe.

5. The mode reversing component according to claim 4, characterized in that: The first cutoff device is any one of a solenoid valve, an electric ball valve and an electronic expansion valve, and the second cutoff device is any one of a solenoid valve, an electric ball valve and an electronic expansion valve.

6. The mode reversing component according to claim 1, characterized in that: Also includes: The third cutoff device is used to cut off the communication between the main body outlet end of the third outlet pipe and the bypass pipe connection point when gas cross-flow occurs in the main body.

7. The mode reversing component according to any one of claims 1 to 6, characterized in that: The reversing body is further provided with an inlet pipe, and the reversing body comprises a coil, a valve cavity and a pilot valve iron core; The pilot valve core is controlled by the coil to slide in the valve cavity, thereby realizing the communication between the inlet pipe and the first outlet pipe, and the second outlet pipe and the third outlet pipe, respectively, or realizing the communication between the inlet pipe and the second outlet pipe, and the first outlet pipe and the third outlet pipe, respectively.

8. An air conditioning device, characterized in that: The method comprises the mode reversing component according to any one of claims 1 to 7.

9. The air conditioning device according to claim 8, characterized in that The air-conditioning equipment also includes a compressor, an indoor heat exchanger and an outdoor heat exchanger. The exhaust pipe of the compressor is connected to the inlet pipe of the mode reversing component, the first outlet pipe of the mode reversing component is connected to the indoor heat exchanger, the second outlet pipe of the mode reversing component is connected to the outdoor heat exchanger, and the third outlet pipe of the mode reversing component is connected to the suction pipe of the compressor.

10. The air conditioning device according to claim 9, characterized in that The exhaust pipe of the compressor is provided with a high-pressure sensor for detecting the high-pressure side pressure data of the compressor, and the intake pipe of the compressor is provided with a low-pressure sensor for detecting the low-pressure side pressure data of the compressor.

Images