Fin type heat exchanger flow dividing pipe, air conditioner heat exchange system and control method

Abstract

The invention provides a flow dividing pipe of a fin type heat exchanger, an air conditioner heat exchange system and a control method. The flow dividing pipe of the fin type heat exchanger comprises a flow dividing pipe body, and the flow dividing pipe body is provided with a connecting part and a liquid guiding part; the connecting part is provided with a plurality of drainage holes; a liquid guide through hole is formed in the liquid guide part, a plurality of hollow liquid guide columns are arranged in the liquid guide through hole, and the liquid guide columns are communicated with the drainage hole; a blocking piece and a rotating shaft are further arranged in the liquid guide through hole, the blocking piece is arranged on the side, away from the connecting part, of the liquid guide column, and the rotating shaft is used for driving the blocking piece to rotate so as to cover or open the liquid guide column, so that the drainage hole is opened or closed. Through mutual cooperation of the liquid guiding column, the blocking piece and the rotating shaft, dynamic regulation and control of a flow path are achieved, different requirements of refrigeration and heating can be met without setting a flow path structure, the occupied space of a heat exchange system is saved, the flow dividing pipe can be widely applied to various air conditioners, and the market competitiveness of the air conditioners is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and more specifically to a fin heat exchanger shunt pipe, an air conditioning heat exchange system and a control method. Background Art

[0002] The fin heat exchanger is a key heat exchange component widely used in single-temperature and dual-temperature air-conditioning systems. It can function as a condenser during cooling operation and as an evaporator during heating operation.

[0003] In conventional designs, fin heat exchangers usually use the same flow path structure in cooling and heating modes, and use the transmission of refrigerant in both the forward and reverse directions 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, and the evaporative heat exchange effect is often not fully utilized.

[0004] At present, in order to solve this problem, the industry tends to adopt a customized flow path design solution, that is, directly adjusting the flow path structure of the fin heat exchanger to adapt to the different needs of cooling and heating, such as setting 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 air conditioners of different specifications and types. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a fin heat exchanger shunt pipe, an air conditioning heat exchange system and a control method to solve the technical problems of low versatility and large space occupied by traditional customized flow path settings.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a fin 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 portion is provided with a plurality of drainage holes, and the drainage holes are used to connect to the flow path of the fin heat exchanger;

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

[0010] Among them, a plurality of the liquid-conducting columns are distributed 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 on the end of the liquid-conducting column away from the connecting part.

[0011] Among them, the liquid conducting through hole is arranged in a circular shape, the area of ​​the baffle is larger than the sum of the radial cross-section areas of several liquid conducting columns, and the sum of the radial cross-section areas of the baffle and several liquid conducting columns is smaller than the radial cross-section area of ​​the liquid conducting through hole.

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

[0013] Among them, the connecting part is provided with a accommodating cavity and a through hole; the accommodating hole is provided at one end of the connecting part away from the liquid conducting part, and the through hole connects the accommodating cavity and the liquid conducting through hole; the rotating shaft is passed through the through hole, and the accommodating cavity is used to accommodate a rotating driving member so that the rotating driving member drives the rotating shaft to rotate.

[0014] In a second aspect, the present invention provides an air conditioning heat exchange system, comprising: a fin heat exchanger and the above-mentioned fin heat exchanger diverter pipe; the fin heat exchanger is provided with a plurality of flow paths, and the drainage holes are connected to the flow paths.

[0015] Among them, 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 fin 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 guiding part, the economizer and the water-side heat exchanger are connected in sequence; the economizer is connected to the compressor intake port; the compressor intake port is connected to the gas-liquid separator.

[0016] In a third aspect, the present invention provides an air conditioning heat exchange control method, which is performed by the above-mentioned fin heat exchanger shunt tube, or the above-mentioned air conditioning heat exchange system, and the air conditioning heat exchange control method comprises the following steps:

[0017] Step S10, confirming the running status of the air conditioning unit after startup, and determining whether the unit is under low voltage protection, if yes, executing step S20, if no, executing step S30;

[0018] Step S20, adjusting the amount of liquid guide column covering the fin heat exchanger shunt pipe, and detecting whether the unit has low pressure protection again, and issuing a maintenance alarm according to the detection result;

[0019] Step S30, determining the unit operation mode, and adjusting the fin heat exchanger shunt pipe to a corresponding preset heat exchange state according to the operation mode.

[0020] The method of adjusting the covering amount of the liquid guide column of the fin heat exchanger shunt pipe and detecting whether the unit has low pressure protection again, and issuing a maintenance alarm according to the detection result, includes:

[0021] Step S21, sequentially covering the liquid-conducting columns according to preset increments to increase the number of covered liquid-conducting columns;

[0022] Step S22, detecting whether the unit has low voltage protection; if so, proceeding to step S23, if not, proceeding to step S24;

[0023] Step S23, obtaining the number of covers that the liquid-conducting column can cover, and determining whether the number of covers that the liquid-conducting column can cover is greater than 0, if so, repeating steps S21-S22, if not, proceeding to step S24;

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

[0025] Wherein, the determining of the unit operation mode and adjusting the fin heat exchanger shunt pipe to a corresponding preset heat exchange state according to the operation mode includes:

[0026] Step S31, determining whether the unit operation mode is a heating mode, if yes, executing step S32, if no, executing step S33;

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

[0028] Step S33, rotating the rotating shaft to cover or open the liquid-conducting column, so that the number of the conductive drainage holes reaches a second preset value.

[0029] The beneficial effects of the present invention compared with the prior art are as follows: the present invention realizes convenient control of the conduction and shutdown of the fin heat exchanger flow path through the mutual cooperation of the liquid guide column, the baffle and the rotating shaft, realizes dynamic regulation of the flow path, and can adapt to different needs of cooling and heating without replacing or setting the flow path structure, thereby significantly improving the heat exchange efficiency and switching flexibility of the fin heat exchanger; and the liquid distributor pipe is small in size, and only the internal structure of the liquid distributor pipe is improved, which greatly reduces the occupied space of the heat exchange system and simplifies the complexity of the internal structure of the unit, so that the distributor pipe is not limited by the physical space of the unit, and can be widely used in air-conditioning systems of different specifications and types, thereby improving the market competitiveness of the heat exchange system and air conditioning.

[0030] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of an air conditioning heat exchange system provided by the present invention;

[0032] Figure 2 A schematic structural diagram of a fin heat exchanger shunt tube provided by the present invention;

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

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

[0035] Figure 5 for Figure 3 A schematic flow chart of a specific implementation of step S30 in FIG.

[0036] Reference numerals:

[0037] 1. Diverter pipe body; 11. Connecting part; 111. Drainage hole; 112. Accommodating chamber; 12. Liquid guiding part; 121. Liquid guiding through hole; 122. Liquid guiding column; 123. Baffle; 124. Rotating shaft; 2. Fin heat exchanger; 3. Compressor; 4. Four-way valve; 5. Economizer; 6. Water side heat exchanger; 7. Gas-liquid separator; 8. Fan. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail in conjunction with the accompanying drawings and specific implementation methods. The technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

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

[0041] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0042] Embodiment 1

[0043] See also Figure 1-2 As shown, this embodiment discloses a fin heat exchanger splitter tube, which includes a splitter tube body 1.

[0044] in, Figure 1 Schematic diagram of the application scenario of the fin heat exchanger shunt tube of this embodiment. Figure 1 As shown, the diverter pipe body 1 of this embodiment is used to connect the fin heat exchanger 2, and can divert and control each flow path of the fin heat exchanger 2, so that the heat exchange system of the air conditioner can quickly respond to changes in the unit operation mode, which helps to achieve a higher heat exchange efficiency, thereby improving the cooling and heating effects of the air conditioner.

[0045] in, Figure 2 The schematic diagram of the structure of the fin heat exchanger shunt pipe of the present embodiment. The shunt pipe body 1 of the present embodiment is provided with a connecting portion 11 and a liquid guiding portion 12; wherein the connecting portion 11 is provided with a plurality of drainage holes 111, and the drainage holes 111 are used to connect to the flow path of the fin heat exchanger 2; the liquid guiding portion 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, and the liquid guiding columns 122 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, and the baffle 123 is provided on the side of the liquid guiding column 122 away from the connecting portion 11, and the rotating shaft 124 is fixedly connected to the baffle 123, and 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 fin heat exchanger manifold of this embodiment can adapt to different requirements 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 that achieve the best heat exchange effect in heating and cooling modes, which can be obtained by experiments according to the type and specification of the air conditioner. For air conditioners of the same specification and type, the corresponding first preset value and second preset value can be directly used without further experiments or calculations; detect whether the operating mode of the air conditioning unit is heating mode or cooling mode. If it is heating mode, rotate the rotating shaft 124 so that the baffle 123 covers or opens a corresponding number of liquid-conducting columns 122, so that the number of flow paths that can be conducted is consistent with the first preset value. If it is cooling mode, rotate the rotating shaft 124 so that the baffle 123 covers or opens a corresponding number of liquid-conducting columns 122, so that the number of flow paths that can be conducted is consistent with the second preset value.

[0047] In addition, the fin heat exchanger shunt pipe of this embodiment can also cope with the abnormal situation of low pressure protection triggered by refrigerant leakage. In specific implementation, after the air conditioning unit triggers the low pressure protection, the rotating shaft 124 is rotated so that the baffle 123 blocks a certain number of liquid guide columns 122 each time it rotates, so as to gradually reduce the number of flow paths conducted by the fin heat exchanger 2, thereby extending the operation time of the unit, satisfying the user's experience and needs, and also leaving buffer time for the unit to shut down and maintenance personnel to come to the site for processing, thereby improving the practicality and reliability of the air conditioner.

[0048] Therefore, the fin heat exchanger flow divider of the present embodiment realizes convenient control of the conduction and shutoff of the flow path of the fin heat exchanger 2 through the mutual cooperation of the liquid guide column 122, the baffle 123 and the rotating shaft 124, realizes dynamic regulation of the flow path, and can adapt to different needs of cooling and heating without replacing or setting the flow path structure, which significantly improves the heat exchange efficiency and switching flexibility of the fin heat exchanger 2; and the liquid distributor tube is small in size, and only the internal structure of the liquid distributor tube is improved, which greatly reduces the occupied space of the heat exchange system, simplifies the complexity of the internal structure of the unit, and makes Since the shunt pipe 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 the heat exchange system and air-conditioning; and the shunt pipe turns on or off the flow path, which can increase or shorten the overall flow path length, thereby minimizing unnecessary refrigerant flow and reducing energy consumption; at the same time, the setting of the shunt pipe for the flow path control of the fin heat exchanger 2 can extend the unit's operating time when the unit is in a low-pressure protection state, avoiding the air conditioner from shutting down directly after receiving a low-pressure protection signal, thereby improving user comfort and satisfaction.

[0049] Specifically, a plurality of liquid-conducting columns 122 are distributed in an arc shape, and the baffle 123 is arranged in a fan shape; the 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-conducting column 122 away from the connecting portion 11. The arc-shaped end of the baffle 123 matches the arc-shaped arrangement of the liquid-conducting column 122, and when the baffle 123 rotates to the end of the liquid-conducting column 122 away from the connecting portion 11, the liquid-conducting column 122 is covered, so that the corresponding drainage hole 111 is closed, and when the baffle 123 rotates to leave the end of the liquid-conducting column 122 away from the connecting portion 11, the liquid-conducting column 122 is opened, so that the corresponding drainage hole 111 is connected to the liquid-conducting through hole 121. The baffle 123 is arranged in a fan shape, which can enable the baffle 123 to rotate at a large angle in a small space. At the same time, the edge of the baffle 123 is smooth, which can reduce the resistance of the air to the baffle 123, facilitate the high-speed rotation of the baffle 123, and help to achieve rapid switching of the flow path, thereby providing a strong guarantee for the efficient operation of the air conditioning heat exchange system.

[0050] Specifically, the liquid-conducting through hole 121 is arranged in a circular shape, the area of ​​the baffle 123 is larger than the sum of the radial cross-sectional areas of the liquid-conducting columns 122, and the sum of the radial cross-sectional areas of the baffle 123 and the liquid-conducting columns 122 is smaller than the radial cross-sectional area of ​​the liquid-conducting through hole 121. An empty space for the baffle 123 is reserved in the liquid-conducting through hole 121, that is, the baffle 123 can be completely moved outside the area of ​​all the liquid-conducting columns 122 without blocking any of the liquid-conducting columns 122, so that all flow paths are connected, and the area of ​​the baffle 123 can cover all the liquid-conducting columns 122 at the same time, so that the baffle 123 can effectively control all flow paths, thereby ensuring the reliability of flow path switching.

[0051] Specifically, the connection part 11 is trumpet-shaped, and the end of the connection part 11 with a small diameter is connected to the liquid guide part 12; a plurality of drainage holes 111 radiate from the end of the connection part 11 with a small diameter to the end of the connection part 11 with a large diameter. The drainage holes 111 are evenly distributed in a trumpet shape and converge from the connection part 11 to the liquid guide part 12, so that the fluid can enter the shunt tube more smoothly, avoiding the disorderly accumulation of the drainage tube outside the shunt tube body to increase the resistance of the fluid movement, and improving the flow efficiency and stability of the fluid.

[0052] Specifically, the connection part 11 is provided with a receiving cavity 112 and a through hole; the receiving hole is provided at one end of the connection 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 is provided through the through hole, and the receiving cavity 112 is used to receive the rotating driving member so that the rotating driving member drives the rotating shaft 124 to rotate. The provision of the receiving cavity 112 improves the space utilization rate of the shunt pipe body 1, and realizes convenient control of the rotating shaft 124 without affecting the flow path connection.

[0053] In an optional embodiment, a rotary drive member (not shown) is further provided in the accommodating chamber 112, and the rotary drive member is installed on the connecting portion 11, and the rotary drive member is used to drive the rotating shaft 124 to rotate. Integrating the rotary drive member on the liquid dispensing tube body greatly improves the compactness and intelligence level of the liquid dispensing tube body.

[0054] In an optional embodiment, the rotating shaft 124 is the output shaft of the rotating drive member. The rotating drive member may be a rotating drive member such as a motor, an electromagnetic drive, or a rotating cylinder. The output shaft of the rotating drive member extends from the accommodating cavity 112 to the liquid guide hole 121 and is fixedly connected to the baffle 123, which simplifies the structure of the liquid distribution pipe of the fin heat exchanger 2, reduces the kinetic energy transfer path, and improves the driving efficiency of the rotating shaft 124 to a certain extent, thereby improving the heat exchange efficiency of the air conditioning unit.

[0055] Embodiment 2

[0056] See also Figure 1-2 As shown, this embodiment discloses an air conditioning heat exchange system, which includes: a fin heat exchanger 2 and a fin heat exchanger diverter pipe of the first embodiment; the fin heat exchanger 2 is provided with a plurality of flow paths, and the drainage holes 111 are connected to the flow paths.

[0057] In specific implementation, the manifold body 1 makes the drainage holes 111 correspond to the flow paths of the fin heat exchanger 2 one by one, and seals the flow path of the fin 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 turned on or off.

[0058] The air conditioning heat exchange system of this embodiment realizes flexible adjustment of the flow path of the fin heat exchanger 2 by controlling the flow path of the fin heat exchanger 2 through the manifold body 1, thereby helping to realize the rapid response of the air conditioning heat exchange system to the heat exchange work. The manifold of the fin heat exchanger is small in size and has the function of quickly regulating the flow path of the fin heat exchanger 2, making the air conditioning heat exchange system compact in structure and small in space, and having a broad application market and application value.

[0059] Specifically, the air conditioning heat exchange system of this embodiment also 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 fin 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 guide 12, the economizer 5 and the water-side heat exchanger 6 are connected in sequence; the economizer 5 is connected to the air intake of the compressor 3; the air intake of the compressor 3 is connected to the gas-liquid separator 7. The air conditioning heat exchange system of this embodiment realizes the rapid conversion of the cooling and heating modes through the flexible switching of the four-way valve 4, and controls the flow path of the fin heat exchanger 2 through the liquid distribution pipe body, so as to realize the efficient heat exchange in the cooling and heating modes.

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

[0061] Gas-liquid separator 7: connected to the air intake port of the compressor 3, used to separate gas and liquid to prevent liquid from entering the compressor 3 and causing liquid hammer; the four-way valve 4 is a control element in the air-conditioning heat exchange system of this embodiment, with four ports, which 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] Fin heat exchanger 2: As a wind-side heat exchanger, that is, a heat exchanger used to exchange heat between fluid and indoor air, its core components are fins and curved flow paths. The fins are made of metal materials with good thermal conductivity, including but not limited to aluminum, copper, etc. When the fluid is input into the interior of the fin heat exchanger 2 through the flow channel, the heat of the fluid is transferred to the fins through the metal wall of the fin heat exchanger 2. Due to the presence of the fins, the heat dissipation area of ​​the fin heat exchanger 2 is greatly increased, so that the heat can be dissipated more effectively and quickly.

[0063] The shunt pipe body 1: the connection part 11 and the liquid guide part 12 are respectively connected to the flow path of the fin heat exchanger 2 and the economizer 5, and the conduction or shutoff of the flow path is controlled by the internal drainage hole 111, the liquid guide column 122 and the baffle 123 structure.

[0064] Economizer 5: also known as flash separator or economizer 5, with an electronic expansion valve installed inside. Major components include oil separator, heater, evaporator, etc., which are used to adjust the reflux volume of refrigerant to reduce the energy consumption of the air-conditioning heat exchange system. The economizer 5 of this embodiment serves as a refrigerant side heat exchanger, that is, as a heat exchanger for intermediate cooling or heating of the refrigerant in the refrigeration or heating cycle. When used in the heating mode, it can form medium-temperature and medium-pressure gas to replenish the compressor 3.

[0065] Water-side heat exchanger 6: a heat exchanger used for heat exchange with water or a water-based solution. In cooling mode, the water-side heat exchanger 6 acts as a condenser, receives high-temperature and high-pressure refrigerant gas from the compressor 3, condenses the refrigerant into liquid through heat exchange, and releases heat to 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 is transformed into an evaporator, absorbing heat in the water circulation and transferring it to the low-temperature and low-pressure refrigerant passing through, 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 arranged in the fin heat exchanger 2, and is used to dissipate heat from the fin heat exchanger 2. The fan 8 is driven to create a forced airflow to flow through the surface of the fin heat exchanger 2, thereby accelerating the transfer of heat and the circulation of air, and working together with the fin heat exchanger 2 and the fin heat exchanger shunt pipe to accelerate the heat exchange efficiency of the air conditioning unit.

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

[0068] The heating principle of the air conditioning heat exchange system of this embodiment is as follows: the compressor 3 generates high-pressure and high-temperature steam, which passes through the four-way valve 4 to the water-side heat exchanger 6, and is converted into high-pressure medium-temperature liquid through water-side heat exchange. At the same time, it is throttled through the economizer 5 to be converted into medium-temperature and medium-pressure gas, and the electronic expansion valve of the economizer 5 is synchronously throttled into low-temperature and low-pressure liquid. The medium-temperature and medium-pressure gas returns to the compressor 3, and the low-temperature and low-pressure liquid passes through the fin heat exchanger 2 to exchange heat with the air to form low-temperature and low-pressure gas, and then passes through the four-way valve 4 and the gas-liquid separator 7 in sequence to flow to the compressor 3 to achieve a heating effect.

[0069] Embodiment 3

[0070] See also Figure 1-5 As shown, this embodiment discloses an air conditioning heat exchange control method, which is performed by the fin heat exchanger shunt pipe of the first embodiment or the air conditioning heat exchange system of the second embodiment, and includes the following steps:

[0071] Step S10, confirming the running status of the air-conditioning unit after startup, and judging whether the unit has low voltage protection, if so, executing step S20, if not, executing step S30.

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

[0073] The air conditioning heat exchange control method of this embodiment adjusts the heat exchange efficiency by adjusting the number of flow path conductions of the fin heat exchanger 2, thereby reducing the impact of refrigerant loss on the system pressure, while maintaining a certain degree of cooling or heating capacity, reducing fluctuations in indoor ambient temperature, and avoiding immediate shutdown of the air conditioning unit when a low-pressure protection signal is detected, thereby affecting the user's experience.

[0074] Step S20, adjusting the covering quantity of the liquid guide column 122 of the fin heat exchanger shunt pipe, and detecting whether the unit has low pressure protection again, and issuing a maintenance alarm according to the detection result.

[0075] When the air conditioning unit has a refrigerant leak and triggers the low pressure protection, the pressure of the air conditioning heat exchange system decreases. Reducing the number of conducting flow paths of the fin heat exchanger 2 can increase the amount of refrigerant passing through each flow path, which helps to stabilize the pressure in the system to a certain extent, thereby providing the air conditioning unit with more time to deal with the leakage problem.

[0076] See also Figure 4 As shown, step S20, that is, adjusting the covering quantity of the liquid guide column 122 of the fin heat exchanger shunt pipe, and detecting whether the unit has low pressure protection again, and issuing a maintenance alarm according to the detection result, specifically includes the following steps S21-S24.

[0077] Step S21 , sequentially covering the liquid-conducting columns 122 according to a preset increment, so as to increase the covering quantity of the liquid-conducting columns 122 .

[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 fin heat exchanger 2, the operating time of the unit is extended, and the immediate shutdown of the air-conditioning unit is avoided, which meets the user's usage experience and needs. At the same time, it can also leave buffer time for the unit shutdown and maintenance personnel to come to the site for processing, thereby improving the practicality and reliability of the air conditioner.

[0079] Step S22, detect whether the unit has low voltage protection; if so, proceed to step S23, if not, proceed to step S24.

[0080] Step S22 can immediately detect whether the air-conditioning unit is still in the low-pressure protection state after the flow path of the fin heat exchanger 2 is adjusted, and timely feedback is given on whether the adjustment of the flow path is effective, which is also convenient for providing information feedback to the user, so that the user can repair the air conditioner in time. When the air-conditioning unit does not send a low-pressure protection signal, it indicates that the problem of low-pressure protection of the unit can be solved by reducing the flow path of the fin heat exchanger 2, but because the refrigerant has leaked, the user still needs to be informed so that the air conditioner can be repaired before the unit is shut down, effectively reducing the user's loss.

[0081] Step S23, obtaining the number that can be covered by the liquid-conducting column 122, and determining whether the number that can be covered by the liquid-conducting column 122 is greater than 0, if so, repeating steps S21-S22, otherwise proceeding to step S24.

[0082] The liquid guide columns 122 are covered until all the liquid guide columns 122 are completely covered, that is, the flow path of the fin heat exchanger 2 is completely shut off. When all the liquid guide columns 122 are completely covered, the air conditioning unit will be shut down, and a maintenance alarm will be sent to the user so that the user can find a maintenance person to come for maintenance.

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

[0084] In this embodiment, the maintenance alarm includes a preliminary judgment of the fault type, recommended emergency treatment measures, and a shortcut to contact the maintenance service, so that users and maintenance personnel can respond quickly and reduce downtime. More specifically, by reducing the flow path of the fin heat exchanger 2 to balance the system pressure, so that the unit does not report a low-pressure protection signal, the maintenance alarm is an alarm that reminds the user that the air conditioner can continue to be used for a period of time, but it is necessary to contact the maintenance personnel in time for on-site maintenance and repair; when the low-pressure protection problem cannot be solved by completely covering the liquid guide column 122, the maintenance alarm is an alarm that informs the user that the air conditioner cannot continue to be used and it is necessary to contact the maintenance personnel immediately for on-site maintenance.

[0085] Step S30, determining the operation mode of the unit, and adjusting the fin heat exchanger shunt pipe to a corresponding preset heat exchange state according to the operation mode.

[0086] Under normal operating conditions, the air conditioning unit enters two operating modes, cooling mode or heating mode, to perform cooling or heating treatment. In cooling mode, the fin heat exchanger 2 acts as a condenser, and the pressure drop on the refrigerant side of the condenser is small. By reducing the number of conductive flow paths, the refrigerant flow rate is increased, thereby improving the heat exchange efficiency on the refrigerant side; in heating mode, the fin heat exchanger 2 acts as an evaporator, and the pressure drop on the refrigerant side has a greater impact on the fin heat exchanger 2, and excessive pressure drop on the refrigerant side will also cause frosting. By increasing the number of conductive flow paths of the fin heat exchanger 2, the pressure drop is reduced, thereby improving the heat exchange performance. Therefore, the variable flow path control of the fin heat exchanger shunt tube can effectively solve the problem of large differences in the corresponding flow paths when the fin heat exchanger 2 is used as an evaporator and a condenser.

[0087] See also Figure 5 As shown, step S30, i.e., determining the operating mode of the unit and adjusting the fin heat exchanger shunt pipe 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 operation mode is heating mode, if so, execute step S32, if not, execute step S33.

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

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

[0091] For steps S31-S33, the number of conduction flow paths that achieve the best operating state is inconsistent in different operating modes. Among them, the first preset value and the second preset value are the number of flow paths that achieve the best heat exchange effect in the heating and cooling modes, respectively, which can be obtained by experiments based on the type and specification of the air conditioner. For air conditioners of the same specification and type, the corresponding first preset value and second preset value can be directly used without further experiments or calculations; it can also be regulated by the program according to the real-time state of the unit, such as comprehensive judgment of the unit's suction superheat, evaporation temperature, high pressure temperature, etc., to obtain the real-time first preset value and second preset value, which improves the intelligence of the air conditioning unit and helps to improve the user's comfort.

[0092] The present invention provides a fin heat exchanger flow divider, an air conditioning heat exchange system and a control method. Through the mutual cooperation of a liquid guide column, a baffle and a rotating shaft, convenient control of the conduction and shutdown of the fin heat exchanger flow path is achieved, and dynamic regulation of the flow path is achieved. The different needs of cooling and heating can be met without replacing or setting the flow path structure, and the heat exchange efficiency and switching flexibility of the fin heat exchanger are significantly improved. The liquid distributor pipe is small in size, and only the internal structure of the liquid distributor pipe is improved, which greatly reduces the occupied space of the heat exchange system and simplifies the complexity of the internal structure of the unit, so that the liquid distributor pipe is not limited by the physical space of the unit and can be widely used in air-conditioning systems of different specifications and types, thereby improving the market competitiveness of the heat exchange system and the air conditioner.

[0093] The above examples are only used to further illustrate the technical content of the present invention, so that readers can understand it more easily, but they do not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A fin heat exchanger manifold, comprising a manifold body, characterized in that: The shunt pipe body is provided with a connecting portion and a liquid guiding portion; The connecting portion is provided with a plurality of drainage holes, and the drainage holes are used to connect to the flow path of the fin heat exchanger; The liquid conducting part is provided with a liquid conducting through hole, and a plurality of hollow liquid conducting columns are provided in the liquid conducting through hole, and the liquid conducting columns are connected to the drainage hole; a baffle and a rotating shaft are also provided in the liquid conducting through hole, and the baffle is provided on a side of the liquid conducting column away from the connecting part, and the rotating shaft is fixedly connected to the baffle, and is used to drive the baffle to rotate to cover or open the liquid conducting column, thereby opening or closing the drainage hole.

2. The fin heat exchanger manifold according to claim 1, characterized in that: The plurality of liquid-conducting columns are distributed 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 on the end of the liquid-conducting column away from the connecting portion.

3. The fin heat exchanger manifold according to claim 2, characterized in that: The liquid conducting through hole is arranged in a circular shape, the area of ​​the baffle is larger than the sum of the radial cross-section areas of the liquid conducting columns, and the sum of the radial cross-section areas of the baffle and the liquid conducting columns is smaller than the radial cross-section area of ​​the liquid conducting through hole.

4. The fin heat exchanger manifold according to claim 1, characterized in that: The connecting part is trumpet-shaped, and the end of the connecting part with a smaller diameter is connected to the liquid guiding part; a plurality of drainage holes radiate from the end of the connecting part with a smaller diameter to the end of the connecting part with a larger diameter.

5. The fin heat exchanger manifold according to claim 1, characterized in that: The connecting portion is provided with a accommodating cavity and a through hole; the accommodating hole is provided at one end of the connecting portion away from the liquid conducting portion, and the through hole connects the accommodating cavity and the liquid conducting through hole; the rotating shaft is passed through the through hole, and the accommodating cavity is used to accommodate a rotating driving member so that the rotating driving member drives the rotating shaft to rotate.

6. An air conditioning heat exchange system, characterized in that: include: A fin heat exchanger and a fin heat exchanger shunt pipe as described in any one of claims 1 to 5; the fin heat exchanger is provided with a plurality of flow paths, and the drainage holes are connected to the flow paths.

7. The air conditioning heat exchange system according to claim 6, characterized in that: Also includes: A compressor, a four-way valve, an economizer, a water-side heat exchanger and a gas-liquid separator; the compressor, the fin heat exchanger, the gas-liquid separator and the water-side heat exchanger are respectively connected to four terminals of the four-way valve; the liquid guide part, the economizer and the water-side heat exchanger are connected in sequence; the economizer is connected to the air intake of the compressor; The compressor air intake port is connected to the gas-liquid separator.

8. An air conditioning heat exchange control method, the method being performed by the fin heat exchanger manifold according to any one of claims 1 to 5, or the air conditioning heat exchange system according to any one of claims 6 to 7, characterized in that: The following steps are involved: Step S10, confirming the running status of the air conditioning unit after startup, and determining whether the unit is under low voltage protection, if yes, executing step S20, if no, executing step S30; Step S20, adjusting the amount of liquid guide column covering the fin heat exchanger shunt pipe, and detecting whether the unit has low pressure protection again, and issuing a maintenance alarm according to the detection result; Step S30, determining the unit operation mode, and adjusting the fin heat exchanger shunt pipe to a corresponding preset heat exchange state according to the operation mode.

9. The air conditioning heat exchange control method according to claim 8, characterized in that: The method of adjusting the amount of liquid guide column covering the fin heat exchanger shunt pipe and detecting whether the unit has low pressure protection again, and issuing a maintenance alarm according to the detection result, includes: Step S21, sequentially covering the liquid-conducting columns according to preset increments to increase the number of covered liquid-conducting columns; Step S22, detect whether the unit is under low voltage protection; if yes, proceed to step S23, if no, proceed to step S24; Step S23, obtaining the number of covers that the liquid-conducting column can cover, and determining whether the number of covers that the liquid-conducting column can cover is greater than 0, if so, repeating steps S21-S22, if not, proceeding to step S24; Step S24: issuing a maintenance alarm to prompt the user to contact the unit maintenance personnel to repair the unit.

10. The air conditioning heat exchange control method according to claim 8, characterized in that: The determining the unit operation mode and adjusting the fin heat exchanger shunt pipe to a corresponding preset heat exchange state according to the operation mode includes: Step S31, determining whether the unit operation mode is a heating mode, if yes, executing step S32, if no, executing step S33; Step S32, rotating the rotating shaft to cover or open the liquid-conducting column, so that the number of the conductive drainage holes reaches a first preset value; Step S33, rotating the rotating shaft to cover or open the liquid-conducting column, so that the number of the conductive drainage holes reaches a second preset value.

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