Fin heat exchanger shunt pipe, air conditioner heat exchange system and control method

Abstract

The application provides a fin heat exchanger shunt pipe, an air conditioner heat exchange system and a control method. The fin heat exchanger shunt pipe comprises a shunt pipe body, the shunt pipe body is provided with a connecting part and a liquid guiding part, the connecting part is provided with a plurality of drainage holes, the liquid guiding part is provided with a liquid guiding through hole, a plurality of hollow liquid guiding columns are arranged in the liquid guiding through hole, the liquid guiding columns are communicated with the drainage holes, a baffle and a rotating shaft are further arranged in the liquid guiding through hole, the baffle is arranged on the side of the liquid guiding column away from the connecting part, the rotating shaft is used for driving the baffle to rotate to cover or open the liquid guiding column, and then the drainage holes are turned on or turned off. Through the cooperation of the liquid guiding column, the baffle and the rotating shaft, the dynamic regulation and control of the flow path are realized, the different requirements of refrigeration and heating can be met without setting the flow path structure, the occupied space of the heat exchange system is saved, the shunt pipe can be widely applied to various air conditioners, and the market competitiveness of the air conditioner is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically to a finned heat exchanger splitter tube, an air conditioning heat exchange system, and a control method. Background Technology

[0002] Finned heat exchangers are key heat exchange components widely used in single-temperature and dual-temperature air conditioning systems. They can function as condensers during cooling operation and as evaporators during heating operation.

[0003] In conventional designs, finned heat exchangers typically employ the same flow path structure in both cooling and heating modes, using the refrigerant's forward and reverse flow to control mode switching. Therefore, when traditional air conditioners perform evaporative heat exchange in heating mode, they still use the same flow path as in condensation mode, often resulting in inefficient evaporative heat exchange.

[0004] Currently, to address this issue, the industry tends to adopt customized flow path design solutions, which involve directly adjusting the flow path structure of the finned heat exchanger to adapt to different cooling and heating requirements, such as setting up 8 dedicated flow paths for cooling mode and 10 dedicated flow paths for heating mode. However, this method lacks versatility and is limited by the physical space of the air conditioning unit, making it difficult to apply to different specifications and types of air conditioners. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a finned heat exchanger distribution pipe, an air conditioning heat exchange system and a control method to solve the technical problems of low versatility and large space occupation of traditional customized flow path settings.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a finned heat exchanger manifold, which includes a manifold body, wherein the manifold body is provided with a connecting portion and a liquid guiding portion;

[0008] The connecting part is provided with a plurality of drainage holes, which are used to connect to the flow path of the finned heat exchanger;

[0009] The liquid guiding part is provided with a liquid guiding through hole, and a plurality of hollow liquid guiding columns are provided in the liquid guiding through hole. The liquid guiding columns are connected to the drainage hole. A baffle and a rotating shaft are also provided in the liquid guiding through hole. The baffle is located on the side of the liquid guiding column away from the connecting part. The rotating shaft is fixedly connected to the baffle and is used to drive the baffle to rotate to cover or open the liquid guiding column, thereby opening or closing the drainage hole.

[0010] The liquid guiding columns are arranged in an arc shape, and the baffle is arranged in a fan shape; the rotating shaft is connected to the tip of the baffle, and the arc-shaped end of the baffle rotates to the end of the liquid guiding column away from the connecting part.

[0011] The liquid guiding hole is circular, the area of ​​the baffle is greater than the sum of the radial cross-sectional areas of the liquid guiding columns, and the sum of the radial cross-sectional areas of the baffle and the liquid guiding columns is less than the radial cross-sectional area of ​​the liquid guiding hole.

[0012] The connecting part is funnel-shaped, with the smaller diameter end of the connecting part connected to the liquid guiding part; a plurality of drainage holes radiate from the smaller diameter end of the connecting part to the larger diameter end.

[0013] The connecting part is provided with a receiving cavity and a through hole; the receiving hole is located at the end of the connecting part away from the liquid guiding part, and the through hole connects the receiving cavity and the liquid guiding through hole; the rotating shaft passes through the through hole, and the receiving cavity is used to accommodate the rotating drive component so that the rotating drive component drives the rotating shaft to rotate.

[0014] Secondly, the present invention provides an air conditioning heat exchange system, comprising: a finned heat exchanger and the aforementioned finned heat exchanger distribution pipe; the finned heat exchanger is provided with a plurality of flow paths, and the flow guide hole is connected to the flow path.

[0015] The air conditioning heat exchange system further includes: a compressor, a four-way valve, an economizer, a water-side heat exchanger, and a gas-liquid separator; the compressor, the finned heat exchanger, the gas-liquid separator, and the water-side heat exchanger are respectively connected to the four terminals of the four-way valve; the liquid guide section, the economizer, and the water-side heat exchanger are connected in sequence; the economizer is connected to the compressor suction port; the compressor suction port is connected to the gas-liquid separator.

[0016] Thirdly, the present invention provides an air conditioning heat exchange control method, which is executed by the aforementioned finned heat exchanger distribution tube or the aforementioned air conditioning heat exchange system, and the air conditioning heat exchange control method includes the following steps:

[0017] Step S10: Confirm the operating status of the air conditioning unit after it is turned on, and determine whether the unit has experienced low pressure protection. If so, proceed to step S20; otherwise, proceed to step S30.

[0018] Step S20: Adjust the number of liquid guide columns covering the finned heat exchanger split tube, and check whether the unit has experienced low pressure protection again. Issue a maintenance alarm based on the detection results.

[0019] Step S30: Determine the unit's operating mode and adjust the finned heat exchanger's distribution tube to the corresponding preset heat exchange state according to the operating mode.

[0020] The process of adjusting the number of liquid guide columns covering the finned heat exchanger's distribution pipe and detecting whether the unit experiences low-pressure protection again, and issuing a maintenance alarm based on the detection results, includes:

[0021] Step S21: Cover the liquid guiding column sequentially according to a preset increment to increase the number of liquid guiding columns covered;

[0022] Step S22: Check if the unit has experienced low-pressure protection; if yes, proceed to step S23; if no, proceed to step S24.

[0023] Step S23: Obtain the number of liquid-conducting columns that can be covered, and determine whether the number of liquid-conducting columns that can be covered is greater than 0. If so, repeat steps S21-S22; otherwise, proceed to step S24.

[0024] Step S24: Issue a maintenance alarm to prompt the user to contact the unit maintenance personnel for maintenance.

[0025] The step of determining the unit's operating mode and adjusting the finned heat exchanger's distribution tubes to the corresponding preset heat exchange state according to the operating mode includes:

[0026] Step S31: Determine whether the unit's operating mode is heating mode. If yes, proceed to step S32; otherwise, proceed to step S33.

[0027] Step S32: Rotate the rotating shaft to cover or open the liquid guiding column, so that the number of drainage holes reaches a first preset value;

[0028] Step S33: Rotate the rotating shaft to cover or open the liquid guiding column, so that the number of drainage holes reaches the second preset value.

[0029] The beneficial effects of this invention compared to existing technologies are as follows: This invention achieves convenient control of the flow path of the finned heat exchanger by the cooperation of the liquid guiding column, baffles, and rotating shaft, realizing dynamic regulation of the flow path. It can adapt to different needs of cooling and heating without changing or setting the flow path structure, significantly improving the heat exchange efficiency and switching flexibility of the finned heat exchanger. Moreover, the liquid distribution pipe is small in size, and only the internal structure of the liquid distribution pipe is improved, which greatly reduces the space occupied by the heat exchange system and simplifies the complexity of the internal structure of the unit. This allows the distribution pipe to be widely used in air conditioning systems of different specifications and types, improving the market competitiveness of the heat exchange system and air conditioning.

[0030] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0031] Figure 1 This invention provides a schematic diagram of the structure of an air conditioning heat exchange system;

[0032] Figure 2 A schematic diagram of the structure of a finned heat exchanger splitter tube provided by the present invention;

[0033] Figure 3 A schematic flowchart of an air conditioning heat exchange control method provided by the present invention;

[0034] Figure 4 for Figure 3 A schematic diagram of a specific implementation method for step S20;

[0035] Figure 5 for Figure 3 A schematic diagram of a specific implementation method for step S30.

[0036] Figure label:

[0037] 1. Diverter body; 11. Connecting part; 111. Drain hole; 112. Receiving cavity; 12. Liquid guiding part; 121. Liquid guiding through hole; 122. Liquid guiding column; 123. Baffle; 124. Rotating shaft; 2. Finned heat exchanger; 3. Compressor; 4. Four-way valve; 5. Eco-friendly device; 6. Water-side heat exchanger; 7. Gas-liquid separator; 8. Fan. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0039] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0040] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0041] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0042] Example 1

[0043] See Figure 1-2 As shown, this embodiment discloses a finned heat exchanger manifold, which includes a manifold body 1.

[0044] in, Figure 1 This is a schematic diagram illustrating the application scenario of the finned heat exchanger manifold in this embodiment. For example... Figure 1 As shown, the diversion pipe body 1 in this embodiment is used to connect to the finned heat exchanger 2, which can divert and control the flow path of each flow path of the finned heat exchanger 2, so that the heat exchange system of the air conditioner can quickly respond to the changes in the unit's operating mode, which helps to achieve higher heat exchange efficiency, thereby improving the air conditioning cooling and heating effects.

[0045] in, Figure 2 This is a schematic diagram of the structure of the finned heat exchanger manifold in this embodiment. The manifold body 1 of this embodiment is provided with a connecting part 11 and a liquid guiding part 12; wherein, the connecting part 11 is provided with a plurality of drainage holes 111, which are used to connect to the flow path of the finned heat exchanger 2; the liquid guiding part 12 is provided with a liquid guiding through hole 121, and a plurality of hollow liquid guiding columns 122 are provided in the liquid guiding through hole 121, which are connected to the drainage holes 111; a baffle 123 and a rotating shaft 124 are also provided in the liquid guiding through hole 121, the baffle 123 is provided on the side of the liquid guiding column 122 away from the connecting part 11, and the rotating shaft 124 is fixedly connected to the baffle 123, which is used to drive the baffle 123 to rotate to cover or open the liquid guiding column 122, thereby opening or closing the drainage hole 111.

[0046] The finned heat exchanger manifold of this embodiment can adapt to different needs of cooling and heating. In specific implementation, a first preset value and a second preset value are preset, wherein the first preset value and the second preset value are respectively the number of flow paths to achieve the best heat exchange effect in heating and cooling modes. These values ​​can be obtained experimentally according to the type and specifications of the air conditioner. For air conditioners of the same type and specifications, the corresponding first preset value and second preset value can be used directly without further experimentation or calculation. The system detects whether the air conditioning unit is in heating or cooling mode. If it is in heating mode, the rotating shaft 124 is rotated so that the baffle 123 covers or opens the corresponding number of liquid guide columns 122, so that the number of flow paths that can be conducted is consistent with the first preset value. If it is in cooling mode, the rotating shaft 124 is rotated so that the baffle 123 covers or opens the corresponding number of liquid guide columns 122, so that the number of flow paths that can be conducted is consistent with the second preset value.

[0047] Furthermore, the finned heat exchanger distribution pipe in this embodiment can also cope with abnormal situations where refrigerant leakage triggers low-pressure protection. In specific implementation, after the air conditioning unit triggers low-pressure protection, the rotating shaft 124 is rotated, so that the baffle 123 blocks a certain number of liquid guide columns 122 with each rotation, thereby gradually reducing the number of flow paths conducted by the finned heat exchanger 2, thus extending the unit's operating time, meeting the user's experience and usage needs, and also providing a buffer time for unit shutdown and maintenance personnel to handle the situation, improving the practicality and reliability of the air conditioner.

[0048] Therefore, in this embodiment, the finned heat exchanger distribution pipe, through the cooperation of the liquid guide column 122, baffle 123, and rotating shaft 124, achieves convenient control over the opening and closing of the flow path of the finned heat exchanger 2, realizing dynamic regulation of the flow path. It can adapt to different cooling and heating needs without changing or resetting the flow path structure, significantly improving the heat exchange efficiency and switching flexibility of the finned heat exchanger 2. Furthermore, the distribution pipe is compact, requiring only improvements to its internal structure, greatly reducing the space occupied by the heat exchange system and simplifying the complexity of the unit's internal structure. Since the manifold is not limited by the physical space of the unit, it can be widely used in air conditioning systems of different specifications and types, thereby improving the market competitiveness of heat exchange systems and air conditioners. Moreover, the manifold can increase or decrease the overall flow path length by opening or closing the flow path, thereby minimizing unnecessary refrigerant flow and reducing energy consumption. At the same time, the manifold's control of the flow path of the finned heat exchanger 2 can extend the unit's operating time under low-pressure protection conditions, avoiding the air conditioner from shutting down directly after receiving a low-pressure protection signal, thus improving user comfort and satisfaction.

[0049] Specifically, several liquid guiding columns 122 are arranged in an arc shape, and baffles 123 are arranged in a fan shape; a rotating shaft 124 is connected to the tip of the baffle 123, and the arc-shaped end of the baffle 123 rotates to the end of the liquid guiding column 122 away from the connecting part 11. The arc-shaped end of the baffle 123 matches the arc arrangement of the liquid guiding columns 122. When the baffle 123 rotates to the end of the liquid guiding column 122 away from the connecting part 11, it covers the liquid guiding column 122, causing the corresponding drainage hole 111 to close. When the baffle 123 rotates to the end of the liquid guiding column 122 away from the connecting part 11, it opens the liquid guiding column 122, causing the corresponding drainage hole 111 to communicate with the liquid guiding through hole 121. The baffle 123 is arranged in a fan shape, which enables the baffle 123 to rotate at a large angle in a small space. At the same time, the smooth edge of the baffle 123 can reduce the air resistance to the baffle 123, which facilitates the high-speed rotation of the baffle 123 and helps to achieve rapid switching of the flow path, providing a strong guarantee for the efficient operation of the air conditioning heat exchange system.

[0050] Specifically, the liquid guiding hole 121 is circular, and the area of ​​the baffle 123 is greater than the sum of the radial cross-sectional areas of the liquid guiding columns 122, while the sum of the radial cross-sectional areas of the baffle 123 and the liquid guiding columns 122 is less than the radial cross-sectional area of ​​the liquid guiding hole 121. Space is reserved within the liquid guiding hole 121 for the baffle 123, allowing the baffle 123 to move completely outside the area of ​​all the liquid guiding columns 122 without obstructing any one of them, thus ensuring all flow paths are open. Furthermore, the area of ​​the baffle 123 is sufficient to simultaneously cover all the liquid guiding columns 122, thereby enabling the baffle 123 to effectively control all flow paths and ensuring the reliability of flow path switching.

[0051] Specifically, the connecting part 11 is funnel-shaped, with the smaller diameter end of the connecting part 11 connected to the liquid guiding part 12; a plurality of drainage holes 111 radiate from the smaller diameter end of the connecting part 11 to the larger diameter end. The drainage holes 111 are evenly distributed in a funnel shape and converge from the connecting part 11 towards the liquid guiding part 12, allowing the fluid to enter the distribution pipe more smoothly, avoiding the accumulation of messy fluid outside the distribution pipe body, which would increase the resistance to fluid movement, and improving the flow efficiency and stability of the fluid.

[0052] Specifically, the connecting part 11 is provided with a receiving cavity 112 and a through hole; the receiving hole is located at the end of the connecting part 11 away from the liquid guiding part 12, and the through hole connects the receiving cavity 112 and the liquid guiding through hole 121; the rotating shaft 124 passes through the through hole, and the receiving cavity 112 is used to accommodate the rotating drive component so that the rotating drive component drives the rotating shaft 124 to rotate. The setting of the receiving cavity 112 improves the space utilization of the diverter body 1, and achieves convenient control of the rotating shaft 124 without affecting the flow path connection.

[0053] In an optional embodiment, a rotary drive (not shown) is also provided within the receiving cavity 112. The rotary drive is mounted on the connecting portion 11 and is used to drive the rotating shaft 124 to rotate. Integrating the rotary drive onto the dispensing tube body significantly improves the compactness and intelligence level of the dispensing tube body.

[0054] In an optional embodiment, the rotating shaft 124 is the output shaft of a rotating drive component. This rotating drive component can be a motor, electromagnetic actuator, rotating cylinder, or other similar device. The output shaft of the rotating drive component extends from the receiving cavity 112 into the liquid guiding hole 121 and is fixedly connected to the baffle 123. This simplifies the structure of the liquid distribution pipe in the finned heat exchanger 2, reduces the kinetic energy transfer path, and to a certain extent improves the driving efficiency of the rotating shaft 124, thereby improving the heat exchange efficiency of the air conditioning unit.

[0055] Example 2

[0056] See Figure 1-2 As shown, this embodiment discloses an air conditioning heat exchange system, which includes: a finned heat exchanger 2 and a finned heat exchanger distribution pipe of Embodiment 1; the finned heat exchanger 2 is provided with a plurality of flow paths, and the flow guide hole 111 is connected to the flow path.

[0057] In practice, the diversion tube body 1 corresponds one-to-one with the flow path of the finned heat exchanger 2 through the flow hole 111, and seals the flow path of the finned heat exchanger 2 through the end of the connecting part 11 away from the liquid guiding part 12, so that the baffle 123 can control the flow path to be opened or closed.

[0058] In this embodiment, the air conditioning heat exchange system controls the flow path of the finned heat exchanger 2 via the manifold body 1, enabling flexible adjustment of the flow path and facilitating rapid response of the system to heat exchange operations. The manifold of the finned heat exchanger is compact and features rapid flow path adjustment, resulting in a compact structure, small footprint, and broad market and application value for the air conditioning heat exchange system.

[0059] Specifically, the air conditioning heat exchange system of this embodiment further includes: a compressor 3, a four-way valve 4, an economizer 5, a water-side heat exchanger 6, and a gas-liquid separator 7; the compressor 3, the finned heat exchanger 2, the gas-liquid separator 7, and the water-side heat exchanger 6 are respectively connected to the four terminals of the four-way valve 4; the liquid guiding part 12, the economizer 5, and the water-side heat exchanger 6 are connected in sequence; the economizer 5 is connected to the suction port of the compressor 3; the suction port of the compressor 3 is connected to the gas-liquid separator 7. The air conditioning heat exchange system of this embodiment achieves rapid switching between cooling and heating modes through the flexible switching of the four-way valve 4, and achieves efficient heat exchange in both cooling and heating modes by controlling the flow path of the finned heat exchanger 2 through the liquid distribution pipe body.

[0060] Among them, compressor 3 is the power core of the air conditioning unit. It is used to compress refrigerant vapor, increase the temperature and pressure of refrigerant, so that it can release heat in the condenser and condense into liquid, thereby achieving the cooling effect. It can also draw in low-temperature and low-pressure refrigerant from the low-pressure zone and send it into the high-pressure zone after compression, maintaining the circulation of refrigerant in the system.

[0061] Gas-liquid separator 7: connected to the suction port of compressor 3, used to separate gas and liquid to prevent liquid from entering compressor 3 and causing liquid slugging; Four-way valve 4 is the control element in the air conditioning heat exchange system of this embodiment. It has four ports and can be connected to four pipes to change the flow direction of the fluid, thereby controlling the operating mode of the air conditioning unit, such as cooling mode and heating mode.

[0062] Finned heat exchanger 2: As an air-side heat exchanger, that is, a heat exchanger used to exchange heat between fluid and indoor air, its core components are fins and a curved flow path. The fins are made of metal materials with good thermal conductivity, including but not limited to aluminum, copper, etc. When the fluid enters the interior of the finned heat exchanger 2 through the flow path, the heat of the fluid is transferred to the fins through the metal wall of the finned heat exchanger 2. Due to the presence of fins, the heat dissipation area of ​​the finned heat exchanger 2 is greatly increased, so that the heat can be dissipated more effectively and quickly.

[0063] The main body of the diversion pipe 1: the connecting part 11 and the liquid guiding part 12 are respectively connected to the flow path of the finned heat exchanger 2 and the energy saver 5, and the flow path is controlled to be opened or closed through the internal structure of the diversion hole 111, the liquid guiding column 122 and the baffle 123.

[0064] Energy saver 5: also known as flash separator or energy saver 5, is equipped with an electronic expansion valve. The main components also include an oil separator, heater, evaporator, etc. It is used to adjust the refrigerant return flow to reduce the energy consumption of the air conditioning heat exchange system. In this embodiment, energy saver 5 is a refrigerant-side heat exchanger, that is, a heat exchanger that performs intermediate cooling or heating of the refrigerant in the refrigeration or heating cycle. It is used in the heating mode and can form medium-temperature and medium-pressure gas to replenish the compressor 3.

[0065] Water-side heat exchanger 6: This is a heat exchanger used for heat exchange with water or water-based solutions. In cooling mode, the water-side heat exchanger 6 acts as a condenser, receiving high-temperature and high-pressure refrigerant gas from the compressor 3. Through heat exchange, it condenses the refrigerant into a liquid state and releases heat into the water circulation system. This heat can be used for domestic hot water supply or other heat recovery applications. In heating mode, the water-side heat exchanger 6 transforms into an evaporator, absorbing heat from the water circulation and transferring it to the passing low-temperature and low-pressure refrigerant, causing it to evaporate and absorb heat, thereby heating the air.

[0066] Specifically, the air conditioning heat exchange system of this embodiment further includes: a fan 8; the fan 8 is disposed inside the finned heat exchanger 2 and is used to dissipate heat from the finned heat exchanger 2. Driving the fan 8 can generate forced airflow to flow over the surface of the finned heat exchanger 2, thereby accelerating heat transfer and air circulation. Working together with the finned heat exchanger 2 and the finned heat exchanger distribution pipe, it accelerates the heat exchange efficiency of the air conditioning unit.

[0067] The refrigeration principle of the air conditioning heat exchange system in this embodiment is as follows: The compressor 3 generates high-pressure, high-temperature steam, which is input to the finned heat exchanger 2 through the four-way valve 4. Under the action of the finned heat exchanger 2 and the fan 8, the high-temperature, high-pressure gas exchanges heat with the air and becomes a high-pressure, medium-temperature liquid. Then, it is throttled by the electronic expansion valve of the energy saver 5 and becomes a low-pressure, low-temperature liquid. Then, it flows to the water-side heat exchanger 6 to exchange heat with water, so that the low-temperature, low-pressure liquid evaporates and absorbs heat to become gas and then returns to the compressor 3, achieving the refrigeration effect.

[0068] The heating principle of the air conditioning heat exchange system in this embodiment is as follows: The compressor 3 generates high-pressure, high-temperature steam, which passes through the four-way valve 4 to the water-side heat exchanger 6. After water-side heat exchange, it becomes a high-pressure, medium-temperature liquid. At the same time, it is throttled by the economizer 5 and transformed into a medium-temperature, medium-pressure gas. The electronic expansion valve of the economizer 5 simultaneously throttles the gas into a low-temperature, low-pressure liquid. The medium-temperature, medium-pressure gas returns to the compressor 3. The low-temperature, low-pressure liquid exchanges heat with the air through the finned heat exchanger 2 to form a low-temperature, low-pressure gas. Then, it flows through the four-way valve 4 and the gas-liquid separator 7 to the compressor 3 in sequence, achieving the heating effect.

[0069] Example 3

[0070] See Figure 1-5 As shown, this embodiment discloses an air conditioning heat exchange control method, which is executed by the finned heat exchanger splitter tube of Embodiment 1 or the air conditioning heat exchange system of Embodiment 2, and includes the following steps:

[0071] Step S10: Confirm the operating status of the air conditioning unit after it is turned on, and determine whether the unit has experienced low pressure protection. If yes, proceed to step S20; otherwise, proceed to step S30.

[0072] In this embodiment, the operating state includes a normal operating state and an abnormal operating state. The abnormal operating state is when refrigerant leaks to the point that the air conditioning unit issues a low-pressure protection signal. The conventional operation of an air conditioning unit in response to a low-pressure protection signal is to shut down the unit and attempt to restart it. However, the unit shutdown will affect the user's use, especially in cold and hot environments.

[0073] The air conditioning heat exchange control method in this embodiment adjusts the heat exchange efficiency by adjusting the number of flow paths in the finned heat exchanger 2, reducing the impact of refrigerant loss on system pressure, while maintaining a certain level of cooling or heating capacity, reducing fluctuations in indoor ambient temperature, and preventing the air conditioning unit from immediately shutting down when a low-pressure protection signal is detected, thus affecting the user experience.

[0074] Step S20: Adjust the number of liquid guide columns 122 covering the finned heat exchanger split tube, and check whether the unit has experienced low pressure protection again. Issue a maintenance alarm based on the test results.

[0075] When a refrigerant leak in the air conditioning unit triggers low-pressure protection, the pressure in the air conditioning heat exchange system decreases. Reducing the number of flow paths in the finned heat exchanger 2 increases the amount of refrigerant flowing through each path, which helps stabilize the system pressure to some extent, thus providing the air conditioning unit with more time to deal with the leak.

[0076] See Figure 4 As shown, step S20, which is to adjust the number of liquid guide columns 122 covering the finned heat exchanger split tube and check whether the unit has experienced low pressure protection again, and issue a maintenance alarm based on the detection results, specifically includes the following steps S21-S24.

[0077] Step S21: Cover the liquid guiding column 122 sequentially according to the preset increment to increase the number of liquid guiding columns 122 covered.

[0078] In this embodiment, the preset increment is one, that is, each time step S21 is executed, the number of liquid guide columns 122 covered increases by one. By gradually reducing the number of flow paths conducted by the finned heat exchanger 2, the running time of the unit is extended, avoiding the immediate shutdown of the air conditioning unit, meeting the user's experience and usage needs, and also providing a buffer time for unit shutdown and maintenance personnel to handle the situation, thereby improving the practicality and reliability of the air conditioner.

[0079] Step S22: Check if the unit has experienced low-pressure protection; if yes, proceed to step S23; if no, proceed to step S24.

[0080] Step S22 allows for immediate re-checking of the air conditioning unit's low-pressure protection status after the flow path adjustment of the finned heat exchanger 2. This provides timely feedback on the effectiveness of the flow path adjustment and facilitates information feedback to the user, enabling timely maintenance of the air conditioner. When the air conditioning unit no longer issues a low-pressure protection signal, it indicates that reducing the flow path of the finned heat exchanger 2 resolves the low-pressure protection issue. However, since refrigerant has already leaked, the user still needs to be informed so that the air conditioner can be maintained before the unit is shut down, effectively minimizing the user's losses.

[0081] Step S23: Obtain the number of liquid guide columns 122 that can be covered, and determine whether the number of liquid guide columns 122 that can be covered is greater than 0. If so, repeat steps S21-S22; otherwise, proceed to step S24.

[0082] The liquid guide columns 122 are covered until all liquid guide columns 122 are completely covered, thus shutting off the flow path of the finned heat exchanger 2. Once all liquid guide columns 122 are covered, the air conditioning unit will shut down and send a maintenance alarm to the user so that the user can find a maintenance personnel to come and repair it.

[0083] Step S24: Issue a maintenance alarm to prompt the user to contact the unit maintenance personnel for maintenance.

[0084] In this embodiment, the maintenance alarm includes a preliminary assessment of the fault type, suggested emergency handling measures, and a quick way to contact maintenance services, enabling users and maintenance personnel to respond quickly and reduce downtime. More specifically, when the unit does not report a low-pressure protection signal by reducing the flow path of the finned heat exchanger 2 to balance the system pressure, the maintenance alarm indicates to the user that the air conditioner can continue to be used for a period of time, but maintenance personnel should be contacted for on-site maintenance in a timely manner; when the low-pressure protection problem cannot be resolved by completely covering the liquid guide column 122, the maintenance alarm informs the user that the air conditioner cannot be used and maintenance personnel should be contacted immediately for on-site maintenance.

[0085] Step S30: Determine the unit's operating mode and adjust the finned heat exchanger's distribution tubes to the corresponding preset heat exchange state according to the operating mode.

[0086] Under normal operating conditions, the air conditioning unit operates in either cooling or heating mode to provide cooling or heating. In cooling mode, the finned heat exchanger 2 acts as a condenser. The refrigerant pressure drop on the condenser side is relatively small. By reducing the number of flow paths, the refrigerant flow rate is increased, thereby improving the heat exchange efficiency on the refrigerant side. In heating mode, the finned heat exchanger 2 acts as an evaporator. The refrigerant pressure drop on the finned heat exchanger 2 has a greater impact on it, and excessive pressure drop can cause frosting. Increasing the number of flow paths in the finned heat exchanger 2 reduces the pressure drop, thereby improving heat exchange performance. Therefore, by controlling the variable flow path of the finned heat exchanger's manifold, the significant difference in flow paths between the evaporator and condenser modes can be effectively addressed.

[0087] See Figure 5 As shown, step S30, which is to determine the unit's operating mode and adjust the finned heat exchanger's distribution tube to the corresponding preset heat exchange state according to the operating mode, specifically includes the following steps S31-S32.

[0088] Step S31: Determine whether the unit's operating mode is heating mode. If yes, proceed to step S32; otherwise, proceed to step S33.

[0089] Step S32: Rotate the rotating shaft 124 to cover or open the liquid guiding column 122, so that the number of drainage holes 111 reaches the first preset value.

[0090] Step S33: Rotate the rotating shaft 124 to cover or open the liquid guiding column 122, so that the number of drainage holes 111 reaches the second preset value.

[0091] For steps S31-S33, the number of flow paths required to achieve optimal operating conditions varies under different operating modes. The first and second preset values ​​represent the number of flow paths required to achieve optimal heat exchange in heating and cooling modes, respectively. These values ​​can be obtained experimentally based on the type and specifications of the air conditioner. For air conditioners of the same type and specification, the corresponding first and second preset values ​​can be used directly without further experimentation or calculation. Alternatively, the system can be adjusted according to the real-time status of the unit through a program, such as by comprehensively judging the unit's suction superheat, evaporation temperature, and high-pressure temperature, to obtain the real-time first and second preset values. This improves the intelligence of the air conditioning unit and helps enhance user comfort.

[0092] This invention provides a finned heat exchanger manifold, an air conditioning heat exchange system, and a control method. Through the cooperation of the liquid guide column, baffles, and rotating shaft, convenient control of the flow path of the finned heat exchanger is achieved, enabling dynamic regulation of the flow path. It can adapt to different cooling and heating needs without changing or resetting the flow path structure, significantly improving the heat exchange efficiency and switching flexibility of the finned heat exchanger. Furthermore, the manifold is compact, requiring only improvements to its internal structure, greatly reducing the space occupied by the heat exchange system and simplifying the complexity of the unit's internal structure. This allows the manifold to be widely used in air conditioning systems of different specifications and types, enhancing the market competitiveness of the heat exchange system and air conditioner.

[0093] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. An air conditioning heat exchange system, characterized in that, include: A finned heat exchanger and a finned heat exchanger distribution pipe; the finned heat exchanger is provided with several flow paths; the finned heat exchanger distribution pipe includes a distribution pipe body, the distribution pipe body is provided with a connecting part and a liquid guiding part; The connecting part is provided with a plurality of flow-guiding holes, which are used to connect to the flow path of the finned heat exchanger and are in communication with the flow path; The liquid guiding part is provided with a liquid guiding through hole, and a plurality of hollow liquid guiding columns are provided in the liquid guiding through hole. The liquid guiding columns are connected to the drainage hole. A baffle and a rotating shaft are also provided in the liquid guiding through hole. The baffle is located on the side of the liquid guiding column away from the connecting part, and the rotating shaft is fixedly connected to the baffle to drive the baffle to rotate to cover or open the liquid guiding column, thereby opening or closing the drainage hole. The connecting part is provided with a receiving cavity and a through hole; the receiving cavity is located at the end of the connecting part away from the liquid guiding part, and the through hole connects the receiving cavity and the liquid guiding through hole; the rotating shaft passes through the through hole, and the receiving cavity is used to accommodate a rotating drive component so that the rotating drive component drives the rotating shaft to rotate. The system detects whether the air conditioning unit is in heating or cooling mode. If it is in heating mode, the rotating shaft is rotated to cover or open the corresponding number of liquid guide columns, so that the number of flow paths is consistent with the first preset value. If it is in cooling mode, the rotating shaft is rotated to cover or open the corresponding number of liquid guide columns, so that the number of flow paths is consistent with the second preset value. The air conditioning heat exchange system also includes: a compressor, a four-way valve, an economizer, a water-side heat exchanger, and a gas-liquid separator; the compressor, the finned heat exchanger, the gas-liquid separator, and the water-side heat exchanger are respectively connected to the four terminals of the four-way valve; the liquid guide section, the economizer, and the water-side heat exchanger are connected in sequence; the economizer is connected to the compressor suction port; the compressor suction port is connected to the gas-liquid separator; The air conditioning heat exchange system also includes: a fan; the fan is located inside the finned heat exchanger and is used to dissipate heat from the finned heat exchanger; The process also includes: Step S10, confirming the operating status of the air conditioning unit after startup, determining whether the unit has experienced low-pressure protection, and if so, proceeding to Step S20; otherwise, proceeding to Step S30; Step S20, adjusting the number of liquid guide columns covering the finned heat exchanger distribution pipe, and detecting whether the unit has experienced low-pressure protection again, issuing a maintenance alarm based on the detection results; Step S30, determining the unit's operating mode, and adjusting the finned heat exchanger distribution pipe to the corresponding preset heat exchange state according to the operating mode. The operating status includes normal operating status and abnormal operating status; the abnormal operating status is when refrigerant leaks to the point that the air conditioning unit sends out a low-pressure protection signal.

2. An air conditioning heat exchange control method, wherein the method is executed by the air conditioning heat exchange system as described in claim 1, characterized in that, The process involves adjusting the number of liquid guide columns covering the finned heat exchanger's distribution pipe and detecting whether the unit experiences low-pressure protection again. Based on the detection results, a maintenance alarm is issued, including: Step S21: Cover the liquid guiding column sequentially according to a preset increment to increase the number of liquid guiding columns covered; Step S22: Check if the unit has experienced low-pressure protection; if yes, proceed to step S23; otherwise, proceed to step S24. Step S23: Obtain the number that the liquid guiding column can cover, and determine whether the number that the liquid guiding column can cover is greater than 0. If so, repeat steps S21-S22; otherwise, proceed to step S24. Step S24: Issue a maintenance alarm to prompt the user to contact the unit maintenance personnel for maintenance.

3. The air conditioning heat exchange control method according to claim 2, characterized in that, The step of determining the unit's operating mode and adjusting the finned heat exchanger's distribution tubes to the corresponding preset heat exchange state according to the operating mode includes: Step S31: Determine whether the unit's operating mode is heating mode. If yes, proceed to step S32; otherwise, proceed to step S33. Step S32: Rotate the rotating shaft to cover or open the liquid guiding column, so that the number of drainage holes reaches a first preset value; Step S33: Rotate the rotating shaft to cover or open the liquid guiding column, so that the number of drainage holes reaches the second preset value.

Images