Integrated air conditioner heat exchange buffer expansion integrated device and expansion cavity replacement method

Abstract

This invention relates to the field of energy-saving air conditioning technology, and in particular to an integrated air conditioning heat exchange, buffering, and expansion device and a method for replacing the expansion chamber. By concentrating the three key functions of heat exchange, buffering, and expansion into a buffering and expansion heat exchange integrated component, the functional connection and spatial partitioning between the heat exchange chamber and the buffer chamber are achieved through the layout of the inner and outer chambers. This buffers and regulates temperature and pressure fluctuations in the circulating water circuit, improving the stability and structural compactness of the entire unit. While ensuring functional synergy, it also improves the utilization rate of the internal space of the equipment. This integrated structure can be quickly installed as a prefabricated module inside the air conditioning equipment, simplifying the on-site installation steps and reducing the number of independent shells, connectors, and redundant structures, thus reducing energy loss paths and improving energy utilization efficiency. The design of the cover plate and fastening components gives the expansion chamber both convenient disassembly and stable locking characteristics, improving equipment assembly efficiency and ease of subsequent maintenance.

Description

Technical Field

[0001] This invention relates to the field of energy-saving air conditioning technology, and in particular to an integrated air conditioning heat exchange buffer expansion device and a method for replacing the expansion chamber. Background Technology

[0002] In the water circulation system of air conditioning equipment, heat exchange devices are typically installed for heat exchange, buffer devices for regulating water volume changes, and expansion devices for adapting to changes in medium volume. Each of these functional structures plays a different role in the system. During system operation, circulating water flows between pipes and various components, achieving heat exchange through heat exchange structures, regulating water volume changes through buffer structures, and adapting to volume changes in the medium caused by temperature variations through expansion structures, thereby maintaining the normal operation of the air conditioning system. During operation, a reasonable design of the heat exchange structure and fluid flow path allows for more thorough flow and contact of the heat exchange medium within the heat exchange area, effectively improving heat exchange efficiency and reducing energy loss during transfer. This, in turn, helps reduce equipment energy consumption and improve overall energy utilization efficiency while meeting the stable operation requirements of the air conditioning system.

[0003] In existing air conditioning water circulation and heat exchange systems, some buffer water tanks are prone to short-circuit flow between inlet and outlet water, resulting in insufficient water residence time and limited buffering effect, which in turn affects the system pressure regulation and heat exchange stability. Furthermore, heat exchange structures, buffer structures, and expansion structures are usually arranged in a decentralized manner, and the functional components need to be connected by multiple pipelines. This not only leads to a complex system structure and a large installation space, but also results in many connection nodes and long energy loss paths, which can easily reduce the overall energy utilization efficiency of the system. Meanwhile, the expansion components installed in the narrow space of the air conditioner casing will adopt an irregular structure, with little operating space and a complicated disassembly and assembly process, making maintenance and replacement inconvenient and difficult to meet the needs of modular assembly and rapid maintenance of equipment.

[0004] Japanese Patent Document (Publication No.: JP6723948B2) discloses an integrated air conditioner in which a cold air inlet 19 is connected to an evaporator 5 and a cooler 8 to form a cold air distribution channel 22. A cold air outlet 19 is also present. A warm air distribution channel 24 is formed by connecting a hot air inlet 17 to a condenser, a hot air fan 9, and a hot air outlet 23. A bypass section 25 connecting the cold air distribution channel and the warm air distribution channel is provided. The bypass section includes a switching device 26 for blocking the cold air outlet and connecting the cold air distribution channel to the warm air distribution channel. The switching device includes a control unit 43 for selecting a cold air mode where cold air is blown from the cold air outlet and a dry mode where the cold air outlet is blocked and dry air is blown from the warm air outlet. Furthermore, a heat exchanger sensor 46 for detecting the evaporator temperature is provided, and a defrost control unit 47 for switching the air distribution channel to a cold air mode using the switching device during defrost operations where frost is removed from the evaporator by stopping defrosting. The aforementioned patent documents do not yet provide a preferred solution for the operation of the compressor and the operation of the air cooler at the temperature of the heat exchanger sensor during dry mode operation at low room temperature. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an integrated air conditioning heat exchange, buffering, and expansion device and a method for replacing the expansion chamber. By concentrating the three key functions of heat exchange, buffering, and expansion into a buffering and expansion heat exchange integrated component, the functional connection and spatial partitioning between the heat exchange chamber and the buffer chamber are achieved through the layout of the inner and outer chambers. This buffers and regulates temperature and pressure fluctuations in the circulating water circuit, improving the stability and structural compactness of the entire unit. This ensures functional synergy while increasing the utilization rate of the internal space, reducing energy loss paths, and improving energy efficiency. More importantly, the design of the cover plate and fastening components gives the expansion chamber both convenient disassembly and stable locking, improving equipment assembly efficiency and ease of maintenance, while reducing overall material and manufacturing costs.

[0006] This invention is achieved using the following technical solution: An integrated air conditioning heat exchange, buffer, and expansion unit includes a housing. Inside the housing are a compressor, a condenser, a throttling valve, and a buffer expansion heat exchange integrated assembly, all connected by pipes to form a refrigerant circulation. The buffer expansion heat exchange integrated assembly includes a heat exchange chamber. The bottom of the heat exchange chamber has an inlet pipe connected to the upstream throttling valve, and the top of the heat exchange chamber has an outlet pipe connected to the downstream compressor. Inside the heat exchange chamber, a second heat exchange coil is installed. Both ends of the second heat exchange coil are connected by pipes to a third heat exchange coil of the indoor air conditioning unit to form a cooling water circulation. A buffer water tank is connected in series in the cooling water circulation pipeline, and the expansion chamber is connected in parallel in the cooling water circulation pipeline. The buffer water tank has a ring structure and is installed outside the heat exchange chamber with a gap fitting. The expansion chamber has a ring structure and is inserted between the buffer water tank and the heat exchange chamber.

[0007] Furthermore, a cover plate is fixed to the top of the expansion cavity, and two sets of cantilever arms are arrayed and fixed on the outer circumference of the expansion cavity. Fastening components that cooperate with the cantilever arms are provided on the outer circumference of the cover plate. Quick connectors are provided on the top of the buffer tank and the top of the expansion cavity. An extension spring is provided between the cover plate and the top plate of the heat exchange cavity. The expansion cavity is inserted into the annular gap between the buffer tank and the heat exchange cavity. By pressing down and rotating the cover plate, the fastening components are fixedly connected to the cantilever arms, and the quick connectors are engaged to connect the buffer tank and the expansion cavity.

[0008] Furthermore, the quick connector includes a second connector and a first connector; two sets of grooves are arrayed on the inner circumference of the top of the buffer tank, and a second connector is set in each of the two sets of grooves, with the second connectors in the two sets of grooves arranged in an array around the center of the buffer tank; two sets of first connectors are arrayed on the outer circumference of the top of the expansion cavity corresponding to the two sets of second connectors, and the first connectors and second connectors are connected; two air bladders are set inside the expansion cavity, and the air bladders are connected to the first connectors, and the interior of the expansion cavity is filled with pressurized gas.

[0009] Furthermore, the fastening assembly includes two sets of suspension rods, which are fixed to the outer circumference of the cover plate. The two sets of suspension rods are arranged corresponding to cantilever arms, and the cantilever arms are formed with protruding push blocks. A through groove is opened on the suspension rod, and a slider is slidably arranged inside the through groove. The top of the slider is provided with a flange for limiting the movement. An avoidance groove is opened at the middle position of the bottom of the slider, and a push block is detachably arranged at the top of the avoidance groove. A support plate is provided on one side of the slider, and a guide rod is provided between the support plate and the suspension rod. One end of the guide rod is fixedly connected to the bottom end of the suspension rod, and the other end of the guide rod slides through the support plate. A return spring is slidably sleeved on the guide rod, and the two ends of the return spring are fixedly connected to the support plate and the suspension rod, respectively. An L-shaped plate is fixed at the bottom end of the slider. The L-shaped plate is arranged facing away from the return spring, and the inner side of the L-shaped plate forms a sloping sawtooth structure.

[0010] Furthermore, a sliding groove with a through-end structure is provided on the slider, the sliding groove connecting to the clearance groove of the slider, and the push block is slidably installed in the sliding groove; a sliding groove is provided inside the end of the push block away from the clearance groove, the middle of the sliding groove is a rectangular groove, and the two ends of the sliding groove are two sets of symmetrically arranged columnar grooves, the rectangular groove connecting with the two sets of columnar grooves; the rectangular groove passes through the push block and connects with the outside of the end away from the clearance groove; locking pins are slidably installed in the two sets of columnar grooves, and dovetail plates are fixed at the ends of the locking pins, the two sets of dovetail plates are slidably installed in the rectangular grooves, and a return spring is provided between the two sets of dovetail plates; locking holes are provided in the inner wall of the sliding groove, and the two sets of locking pins extend into the locking holes to fix and limit the push block and the slider.

[0011] Furthermore, the buffer tank has an inner cavity with an inlet and an outlet. The inlet is located at the bottom of the buffer tank and is installed in the tangential direction of the circumference. An annular partition is provided at the top of the buffer tank cavity, and a flow port is opened on the annular partition. Two second connectors and the outlet are located between the annular partition and the top plate of the buffer tank. The two second connectors are located on both sides of the flow port, and the outlet is located at the end away from the flow port.

[0012] Furthermore, the second heat exchange coil has an inlet pipe and an outlet pipe. The inlet of the buffer water tank is connected to the cooling water return end of the indoor unit of the air conditioner through a pipeline, and the outlet of the buffer water tank is connected to the inlet pipe of the second heat exchange coil through a pipeline. The outlet pipe of the second heat exchange coil is connected to the cooling water inlet end of the indoor unit of the air conditioner through a pipeline.

[0013] Furthermore, the housing includes a first chamber, a second chamber, and a third chamber connected in sequence; a condenser is installed inside the first chamber, and the condenser includes a first heat exchange coil, heat exchange fins, and a fan; one end of the first heat exchange coil is connected to an upstream compressor, and the other end of the first heat exchange coil is connected to a downstream throttle valve; the second chamber includes upper and lower chambers, and a circulation pump, a throttle valve, and a pipeline interface are installed inside the lower chamber of the second chamber, the circulation pump including a first circulation pump and a second circulation pump; a buffer expansion heat exchange integrated assembly is installed inside the upper chamber of the second chamber; a compressor, a separator, a four-way valve, and a capacitor are installed inside the third chamber.

[0014] Furthermore, an exposure groove is provided on the cover plate corresponding to the groove of the buffer tank, which facilitates the exposure of the internal structure of the groove; a slot is provided at the center of the cover plate to facilitate the passage of pipes; and an annular groove is provided at the bottom of the cover plate to limit the extension spring.

[0015] Furthermore, a method for replacing the expansion chamber, applied to the integrated air conditioning heat exchange buffer expansion device, includes the following steps: S1. Place the extension spring at the top of the heat exchange chamber and align the expansion chamber with the annular gap between the heat exchange chamber and the buffer tank. S2. The lower cover plate compresses the extension spring, causing the expansion cavity to be inserted downwards along the gap of the ring body to the predetermined position; S3. Rotate the cover plate to make the first joint and the second joint correspond to each other, and at the same time drive the suspension rod, slider and L-shaped plate to rotate synchronously, so that the L-shaped plate moves to the bottom of the cantilever. S4. By pushing the push block against the support block, the slider and L-shaped plate are moved up, so that the L-shaped plate abuts against the cantilever. Then the downward pressure on the cover plate is released, and the L-shaped plate is locked with the cantilever under the reset action of the extension spring, thereby completing the installation of the expansion cavity. S5. During disassembly, the lower cover plate compresses the extension spring, driving the dovetail plate to move and disengage the locking pin from the locking hole of the slider, thereby releasing the lock between the push block and the slider. S6. Under the action of the return spring, the slider and L-shaped plate move down and disengage from the cantilever. Rotate the cover plate in the opposite direction, and then remove the expansion chamber from between the heat exchange chamber and the buffer water tank to complete the replacement.

[0016] The integrated air conditioning heat exchange buffer expansion device and expansion chamber replacement method described in this invention have the following advantages: 1. In this invention, the three key functions of heat exchange, buffering, and expansion are integrated into a buffer-expansion heat exchange integrated component. The functional connection and spatial partitioning between the heat exchange chamber and the buffer chamber are achieved through the layout of the inner and outer cavities. This buffers and regulates temperature and pressure fluctuations in the circulating water circuit, improving the stability and structural compactness of the entire unit. This ensures functional synergy while increasing the utilization rate of the internal space of the equipment. This integrated structure can be quickly installed as a prefabricated module inside the air conditioning equipment, which not only simplifies the on-site installation steps but also reduces the number of independent shells, connectors, and redundant structures, reducing energy loss paths and improving energy utilization efficiency. More importantly, the design of the cover plate and fastening components gives the expansion chamber the dual characteristics of convenient disassembly and assembly and stable locking, improving equipment assembly efficiency and subsequent maintenance convenience, while reducing overall material and manufacturing costs.

[0017] 2. In this invention, by integrating the buffer tank, expansion chamber, and heat exchange chamber into the same closed box structure, multiple functional components that were originally scattered are formed into an integrated module. This not only shortens the system pipeline length and reduces the number of connection nodes, but also reduces the installation space occupation and potential leakage points, reduces the energy loss path, improves energy utilization efficiency, and also improves the system structure integration and reduces the overall manufacturing and installation costs. Specifically, the ring-shaped buffer tank is installed on the outer periphery of the heat exchange chamber in a gap-fitting manner, and the ring-shaped expansion chamber is inserted between the buffer tank and the heat exchange chamber.

[0018] 3. In this invention, by setting a fastening component between the cover plate and the cantilever, and utilizing the linkage between the push block, the support block, the slider, and the L-shaped plate, the expansion cavity can be quickly pressed and fixed by the push block abutting against the support block during installation, which drives the slider to move upward and the L-shaped plate to rise and lock with the cantilever. After the limit is released, the slider can be reset and moved downward, driving the L-shaped plate to disengage from the cantilever, enabling convenient disassembly and replacement of the expansion cavity. At the same time, the sliding groove, the slide channel, the dovetail plate, the locking column, and the return spring together constitute the limit and unlocking mechanism of the support block, which can stably limit the support block under normal use, avoiding loosening and displacement caused by equipment vibration or long-term operation. More importantly, this locking method unifies the installation locking and disassembly unlocking in the same transmission structure, allowing the expansion cavity to be quickly assembled or maintained in a modular form, thereby further improving equipment maintenance efficiency and reducing operational complexity.

[0019] 4. In this invention, by creating a circumferential swirling flow of the fluid entering the buffer tank within the inner cavity, and by reorganizing the fluid flow path in conjunction with an annular baffle and a flow port, the fluid's travel distance within the buffer tank is extended, allowing for more thorough buffering and mixing before entering the upper region. This also prevents the fluid from directly approaching the outlet from the inlet, thus avoiding short-circuit flow and improving the water's residence time and flow uniformity within the tank. Simultaneously, the spatial distribution of the second connector and the outlet ensures a relatively stable flow state before entering subsequent circulation, facilitating a smooth response of the expansion chamber to pressure changes and enhancing the heat exchange stability of the second heat exchange coil. More importantly, this flow path design achieves synergistic effects of pressure buffering and temperature regulation while also improving the overall temperature balance of the water circulation system, increasing energy utilization efficiency, and making the water supply and return process on the air conditioning unit side more stable, thereby further improving the reliability and heat exchange efficiency of the device during long-term operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall installation structure of the device of the present invention; Figure 2 This is a three-dimensional schematic diagram of the internal structure of the device of the present invention; Figure 3 This is a structural diagram of the buffer expansion heat exchange integrated component of the device of the present invention. Figure 4This is a three-dimensional schematic diagram of the split structure of the buffer water tank of the device of the present invention; Figure 5 This is a three-dimensional schematic diagram of the heat exchange cavity structure of the device of the present invention; Figure 6 This is a three-dimensional schematic diagram of the expansion cavity structure of the device of the present invention; Figure 7 This is a three-dimensional schematic diagram of the cross-sectional structure of the expansion cavity of the device of the present invention; Figure 8 This is a three-dimensional schematic diagram of the fastening components and cantilever cooperation structure of the device of the present invention; Figure 9 This is a three-dimensional schematic diagram of the fastening components and the cantilever of the device of the present invention in a separated state; Figure 10 This is a schematic diagram of the push block resetting structure within the slider splitting structure of the device of the present invention; In the diagram, the components are: shell-11; first chamber-12; second chamber-13; third chamber-14; lower chamber-15; first heat exchange coil-16; heat exchange fins-17; fan-18; compressor-19; buffer expansion heat exchange integrated assembly-20; buffer water tank-21; base-22; cantilever-23; groove-24; heat exchange cavity-25; extension spring-26; expansion cavity-27; cover plate-28; fastening assembly-29; inner cavity-30; annular partition-31; and flow port-3. 2; Inlet - 33; Push block - 34; Outlet - 35; Inlet pipe - 36; Outlet pipe - 37; Second heat exchange coil - 38; Inlet pipe - 39; Outlet pipe - 40; First connector - 41; Groove - 42; Exposed groove - 43; Airbag - 44; Suspension rod - 45; Slider - 46; Guide rod - 47; Return spring - 48; Push block - 49; L-shaped plate - 50; Sliding groove - 51; Sliding groove - 52; Return spring - 53; Dovetail plate - 54; Locking column - 55; Second connector - 56. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] Example 1: like Figure 1-10 As shown, an integrated air conditioning heat exchange, buffer, and expansion device includes a housing 11. Inside the housing 11 are a compressor, condenser, throttle valve, and a buffer expansion heat exchange integrated assembly 20, all connected by pipes to form a refrigerant circulation system. The buffer expansion heat exchange integrated assembly 20 includes a heat exchange chamber 25. An inlet pipe 36 is located at the bottom of the heat exchange chamber 25 and connects to the upstream throttle valve. An outlet pipe 37 is located at the top of the heat exchange chamber 25 and connects to the downstream compressor. A second heat exchange coil 38 is installed inside the heat exchange chamber 25. Both ends of the second heat exchange coil 38 are connected by pipes to a third heat exchange coil of the indoor unit of the air conditioner to form a cooling water circulation system. A buffer water tank 21 is connected in series in the cooling water circulation pipe, and an expansion chamber 27 is connected in parallel in the cooling water circulation pipe. The buffer water tank 21 has a ring structure and is installed outside the heat exchange chamber 25 with a gap fitting. The expansion chamber 27 has a ring structure and is inserted between the buffer water tank 21 and the heat exchange chamber 25. It should be noted that a base 22 is installed at the bottom of the buffer water tank 21, which not only provides support but also provides installation space.

[0025] In this invention, the three key functions of heat exchange, buffering, and expansion are integrated into a buffer-expansion heat exchange integrated component. The layout of the inner and outer cavities achieves functional connection and spatial partitioning between the heat exchange cavity and the buffer cavity, buffering and regulating temperature and pressure fluctuations in the circulating water circuit. This improves the stability and structural compactness of the entire unit, thereby increasing the utilization rate of internal space while ensuring functional synergy. This integrated structure can be quickly installed as a prefabricated module inside the air conditioning equipment, simplifying on-site installation steps and reducing the number of independent shells, connectors, and redundant structures, thus reducing energy loss paths and improving energy utilization efficiency. More importantly, the design of the cover plate 28 and the fastening component 29 gives the expansion cavity 27 both convenient disassembly and stable locking characteristics, improving equipment assembly efficiency and subsequent maintenance convenience, while reducing overall material and manufacturing costs.

[0026] It should be noted that the heat exchange chamber 25 is configured as a cylindrical structure, while the buffer water tank 21 and the expansion chamber 27 are configured as an annular structure and are arranged coaxially around the heat exchange chamber 25, forming a cylindrical-annular nested structure. During the operation of the air conditioning system, the refrigerant or heat exchange medium forms a swirling flow path in the circumferential direction in this structure, thereby extending the flow distance of the fluid in the heat exchange area, strengthening the heat exchange contact between the fluid and the chamber wall, improving heat exchange efficiency, and reducing dead zones and short-circuit phenomena. This is beneficial to improving the overall heat exchange performance of the air conditioning system and reducing energy loss. The buffer water tank 21 with a ring structure is fitted outside the heat exchange cavity 25 with a column structure, and a necessary installation distance D needs to be reserved. The distance D is designed reasonably to meet the installation conditions and conform to the applicable size of the expansion cavity 27, and finally a reasonable value of D is determined. Meanwhile, the ring structure arranged around the column structure can form a compact integrated structure within a limited space, effectively reducing the size of the device, improving the utilization rate of the internal space of the air conditioning equipment, and making the overall structure more compact, which is conducive to the miniaturization and integration design of energy-saving air conditioning equipment. In addition, the ring structure and the column structure form a large circumferential contact area, making the heat transfer more uniform and stable in the circumferential direction, further improving the heat exchange stability and system operating efficiency, thereby reducing the energy consumption of the air conditioning system. At the same time, the uniform stress of the column and ring structures can improve the overall pressure bearing capacity and sealing reliability of the cavity, and facilitate the assembly and disassembly of the expansion cavity 27 in the axial direction. While ensuring structural stability, it is convenient for later maintenance and quick replacement, thereby further improving the reliability and maintenance efficiency of the energy-saving air conditioning system.

[0027] Furthermore, a cover plate 28 is fixedly installed on the top of the expansion cavity 27, and two sets of cantilever arms 23 are arrayed and fixed on the outer circumference of the expansion cavity 27. A fastening assembly 29 that cooperates with the cantilever arms 23 is provided on the outer circumference of the cover plate 28. A quick connector is provided on the top of the buffer water tank 21 and the top of the expansion cavity 27. An extension spring 26 is provided between the cover plate 28 and the top plate of the heat exchange cavity 25. The expansion cavity 27 is inserted into the annular gap between the buffer water tank 21 and the heat exchange cavity 25. By pressing down and rotating the cover plate 28, the fastening assembly 29 is fixedly connected to the cantilever arms 23, and the quick connector is connected to connect the buffer water tank 21 and the expansion cavity 27.

[0028] A cover plate 28 is provided on the top of the expansion cavity 27, and two sets of cantilever arms 23 are arranged in an array on its outer circumference. At the same time, a fastening component 29 that cooperates with the cantilever arms 23 is provided on the outer circumference of the cover plate 28, so that the expansion cavity 27 can be quickly locked with the cantilever arms 23 by pressing down and rotating the cover plate 28 during installation, thereby stably positioning it in the annular gap between the buffer water tank 21 and the heat exchange cavity 25. Meanwhile, a quick connector is provided on the top of the buffer water tank 21 and the expansion cavity 27, so that the fluid connection is completed simultaneously when the expansion cavity 27 is installed, reducing additional pipeline connections and reducing the risk of leakage. In addition, an extension spring 26 is provided between the cover plate 28 and the top plate of the heat exchange cavity 25, so that the cover plate 28 generates an upward pre-tightening force after locking, thereby improving the connection stability of the fastening component 29 and the cantilever arms 23, and facilitating the disassembly and replacement of the expansion cavity 27 by reverse operation.

[0029] Furthermore, the quick connector includes a second connector 56 and a first connector 41; two sets of grooves 24 are arrayed on the inner circumference of the top of the buffer tank 21, and the second connectors 56 are respectively arranged in the two sets of grooves 24, and the second connectors 56 in the two sets of grooves 24 are arranged in an array around the center of the buffer tank 21; two sets of first connectors 41 are arrayed on the outer circumference of the top of the expansion cavity 27 corresponding to the two sets of second connectors 56, and the first connectors 41 and the second connectors 56 are connected to form a connection; two air bladders 44 are arranged inside the cavity of the expansion cavity 27, and the air bladders 44 are connected to the first connectors 41, and the interior of the expansion cavity 27 is filled with pressurized gas.

[0030] It should be noted that quick couplings are commercially available and belong to existing technology; therefore, the principle will not be explained in detail here. The second connector 56 of the quick connector is connected to the first connector 41; corrugated pipes are used in some sections of the pipe body to facilitate adjustment of the connection angle; the connection can also be made by screwing on a nut.

[0031] Two sets of grooves 24 are arranged in an array around the inner circumference of the top of the buffer water tank 21, and second connectors 56 are respectively arranged in the grooves 24. The second connectors 56 are arranged in an array with the center of the buffer water tank 21 as the reference. At the same time, two sets of first connectors 41 are arranged on the outer circumference of the top of the expansion cavity 27. The first connectors 41 and the second connectors 56 are connected and connected when the expansion cavity 27 is installed in place, so that the fluid inside the buffer water tank 21 can enter the expansion cavity 27. Meanwhile, two air bladders 44 are arranged inside the expansion cavity 27 and connected to the first connectors 41. The expansion cavity 27 is filled with pressurized gas, so that the air bladders 44 can undergo elastic deformation when the fluid pressure changes, thereby absorbing and buffering the system pressure fluctuations, stabilizing the fluid pressure and improving the stability of the air conditioning system operation.

[0032] It is worth noting that the two airbags 44 are interconnected by a pipeline, which allows the gas to flow in a balanced manner between the two airbags 44. This enables the two sets of airbags 44 to change synchronously during the compression or rebound process, avoiding excessive deformation of one side of the airbag 44, improving the stability of the buffering and adjustment process, and making the pressure change inside the expansion chamber 27 more uniform, reducing single-point fatigue and extending service life. Meanwhile, in order to adapt to the structural space of the annular inner cavity 30, multiple sets of airbags 44 can be set along the circumferential direction, so that each airbag 44 is distributed in the circumferential direction, thereby improving the uniformity of the adjustment of the volume change of the inner cavity 30, reducing local stress concentration, and further improving the buffering and pressure regulation effect of the expansion cavity 27.

[0033] Furthermore, the fastening assembly 29 includes two sets of suspension rods 45, which are fixed to the outer circumferential surface of the cover plate 28. The two sets of suspension rods 45 are arranged corresponding to the cantilever 23, and the cantilever 23 has an outwardly protruding push block 34 formed on it. A through groove is opened on the suspension rod 45, and a slider 46 is slidably arranged inside the through groove. A flange for limiting the position is provided on the top of the slider 46. An avoidance groove is opened at the middle position of the bottom of the slider 46, and a push block 49 is detachably arranged on the top of the avoidance groove. A side of the slider 46 is provided with A support plate is placed, and a guide rod 47 is set between the support plate and the suspension rod 45. One end of the guide rod 47 is fixedly connected to the bottom end of the suspension rod 45, and the other end of the guide rod 47 slides through the support plate. A return spring 48 is slidably sleeved on the guide rod 47. The two ends of the return spring 48 are fixedly connected to the support plate and the suspension rod 45 respectively. An L-shaped plate 50 is fixedly installed at the bottom end of the slider 46. The L-shaped plate 50 is set towards the side away from the return spring 48, and the inner side of the L-shaped plate 50 forms a sloping sawtooth structure.

[0034] During installation, when the cover plate 28 rotates and moves the L-shaped plate 50 to a position below the cantilever 23, the push block 34 abuts against the push block 49 and generates an upward pushing force, which drives the slider 46 to move upward along the through groove on the suspension rod 45 and compresses the return spring 48, thereby causing the L-shaped plate 50 at the bottom of the slider 46 to rise synchronously and abut against the cantilever 23 for locking, thus achieving stable fixation between the cover plate 28 and the cantilever 23; the return spring 48 provided on one side of the slider 46 allows the slider 46 to return and move downward after the force is released, thereby facilitating the L-shaped plate 50 to disengage from the cantilever 23 for unlocking; the L-shaped plate 50 is fixedly provided at the bottom of the slider 46, and the inner side of the L-shaped plate 50 forms a sloping sawtooth structure to improve the engagement stability when locked with the cantilever 23.

[0035] Furthermore, a sliding groove 51 with a through-end structure is provided on the slider 46, the sliding groove 51 is connected to the clearance groove of the slider 46, and the push block 49 is slidably installed in the sliding groove 51; a sliding groove 52 is provided inside the end of the push block 49 away from the clearance groove, the middle part of the sliding groove 52 is a rectangular groove, and the two ends of the sliding groove 52 are two sets of symmetrically arranged columnar grooves, the rectangular groove is connected to the two sets of columnar grooves; the rectangular groove passes through the push block 49 and is connected to the outside of the end away from the clearance groove; locking pins 55 are slidably arranged in the two sets of columnar grooves respectively, and dovetail plates 54 are fixed at the ends of the locking pins 55. The two sets of dovetail plates 54 are slidably installed in the rectangular groove respectively, and a return spring 53 is provided between the two sets of dovetail plates 54; locking holes are provided in the inner wall of the sliding groove 51 respectively, and the two sets of locking pins 55 extend into the locking holes to fix and limit the push block 49 and the slider 46.

[0036] When it is necessary to disassemble the expansion cavity 27, by driving the two sets of dovetail plates 54 to move closer to each other, the locking pin 55 is disengaged from the locking hole, thereby releasing the limiting relationship between the push block 49 and the slider 46, allowing the push block 49 to move in the sliding groove 51 and cooperate with the slider 46 to move down, so that the L-shaped plate 50 is separated from the cantilever 23. Furthermore, it is beneficial for the L-shaped plate 50 to rotate away from the projection plane of the cantilever 23 and quickly separate, realizing the rapid unlocking and disassembly and replacement of the expansion cavity 27, thereby improving the ease of operation and structural reliability during device maintenance.

[0037] Furthermore, the buffer tank 21 has an inner cavity 30 connected to an inlet 33 and an outlet 35. The inlet 33 is located at the bottom of the buffer tank 21 and is installed in the circumferential tangential direction. An annular partition 31 is provided at the top of the cavity of the buffer tank 21, and a flow port 32 is opened on the annular partition 31. The two second connectors 56 and the outlet 35 are located between the annular partition 31 and the top plate of the buffer tank 21. The two second connectors 56 are respectively located on both sides of the flow port 32, and the outlet 35 is located at the end away from the flow port 32. By creating a circumferential swirling flow in the fluid entering the inner cavity 30 of the buffer tank 21, and then allowing the fluid to enter the upper region through the flow port 32 before being discharged through the outlet 35, a longer circulating flow path is formed inside the buffer tank 21. This slows down the fluid velocity, reduces instantaneous impact pressure, and increases the residence time of the fluid inside the tank, thus buffering system pressure fluctuations. At the same time, the fluid forms a more uniform and stable flow state before entering the second connector 56, which helps the expansion chamber 27 to smoothly regulate pressure changes, thereby improving the pressure stability and heat exchange reliability of the entire device during operation.

[0038] Furthermore, the second heat exchange coil 38 has an inlet pipe 39 and an outlet pipe 40. The inlet 33 of the buffer water tank 21 is connected to the cooling water return end of the air conditioner indoor unit through a pipeline, and the outlet 35 of the buffer water tank 21 is connected to the inlet pipe 39 of the second heat exchange coil 38 through a pipeline. The outlet pipe 40 of the second heat exchange coil 38 is connected to the cooling water inlet end of the air conditioner indoor unit through a pipeline. It should be noted that a float valve or electronic level controller is installed at the inlet of the buffer tank 21 to achieve automatic water replenishment and avoid human error; the water source is introduced after filtration (such as by installing a Y-type filter); an air vent valve can also be installed on the top of the buffer tank 21.

[0039] A circulating water path is formed between the buffer water tank 21 and the second heat exchange coil 38, allowing the cooling water stored in the buffer water tank 21 to participate in the cooling water circulation process of the air conditioner indoor unit. This buffers and regulates changes in water volume and temperature fluctuations during system operation. At the same time, the second heat exchange coil 38 regulates the heat exchange of the cooling water during circulation, making the temperature of the cooling water entering the air conditioner indoor unit more stable, reducing temperature fluctuations caused by system start-up, shutdown, or load changes, and improving the stability and heat exchange efficiency of the air conditioning system.

[0040] Furthermore, the housing 11 includes a first chamber 12, a second chamber 13, and a third chamber 14 connected in sequence; a condenser is installed inside the first chamber 12, and the condenser includes a first heat exchange coil 16, heat exchange fins 17, and a fan 18; one end of the first heat exchange coil 16 is connected to the upstream compressor 19, and the other end of the first heat exchange coil 16 is connected to the downstream throttle valve; the second chamber 13 includes upper and lower chambers, and a circulation pump, a throttle valve, and a pipeline interface are installed inside the lower chamber 15 of the second chamber 13, and the circulation pump includes a first circulation pump and a second circulation pump; a buffer expansion heat exchange integrated assembly is installed inside the upper chamber of the second chamber 13; a compressor, a separator, a four-way valve, and a capacitor are installed inside the third chamber 14; It should be noted that the first circulation pump is installed in the closed loop of the refrigerant circulation pipeline; the second circulation pump is installed in the circulation system of the cooling water pipeline.

[0041] By dividing the shell 11 into a first chamber 12, a second chamber 13, and a third chamber 14, the condensing heat exchange components, the hydraulic circulation components, and the refrigeration unit components are arranged in different chambers, thereby achieving functional zoning and reducing mutual interference between components. At the same time, the gas path heat exchange area, the water path circulation area, and the refrigeration control area form relatively independent working spaces, which helps to improve the compactness and rationality of the overall equipment structure and facilitates heat dissipation and maintenance of each system during operation. In addition, by arranging the buffer expansion heat exchange integrated component in the upper area of ​​the second chamber 13, it can buffer and regulate the pressure fluctuations in the circulating water path during system operation, thereby improving the stability of system operation and reducing the impact of pressure shocks on pipelines and equipment.

[0042] Furthermore, an exposure groove 43 is provided on the cover plate 28 corresponding to the groove 24 of the buffer water tank 21, which facilitates the exposure of the internal structure of the groove 24; a slot 42 is provided at the center of the cover plate 28 to facilitate the passage of pipes; and an annular groove is provided at the bottom end of the cover plate 28 to limit the extension spring 26.

[0043] By setting the exposed groove 43, the internal structure of the groove 24 can remain externally visible when the cover plate 28 is installed, thus facilitating the observation of the installation position, working status, and maintenance of internal components. By setting the slot 42 in the center of the cover plate 28, space is provided for the relevant pipelines to pass through, making the pipeline layout more concentrated and compact and reducing interference with the cover plate structure. At the same time, the annular groove provides circumferential restraint for the extension spring 26, ensuring that the extension spring 26 maintains a stable position during compression and reset, preventing displacement or tilting, thereby improving the stability of the cover plate 28 during vertical movement and the overall reliability of the device operation.

[0044] Example 2: A method for replacing the expansion chamber, applied to the integrated air conditioning heat exchange buffer expansion device, includes the following steps: S1. Installation Preparation: The extension spring 26 is placed at the top of the heat exchange chamber 25, and the expansion chamber 27 is set to correspond to the annular gap between the heat exchange chamber 25 and the buffer water tank 21, so that the extension spring 26 is located between the top of the heat exchange chamber 25 and the cover plate 28. S2, Press down and insert: Press down the cover plate 28 to compress the extension spring 26 and insert the expansion cavity 27 downward into the predetermined position along the annular gap between the heat exchange cavity 25 and the buffer water tank 21. S3, Rotational alignment: Rotate the cover plate 28 to drive the suspension rod 45, the slider 46 and the L-shaped plate 50 to rotate synchronously, so that the L-shaped plate 50 moves horizontally in the plane below the cantilever 23 until the L-shaped plate 50 moves directly below the cantilever 23. S4. Locking and fixing: After the L-shaped plate 50 is located directly below the cantilever 23, the push block 34 pushes the support block 49 to move it upward, causing the slider 46 and the L-shaped plate 50 to move upward, and causing the return spring 48 to be compressed and deformed until the sloping sawtooth structure on the inner side of the L-shaped plate 50 abuts the cantilever 23. Release the downward pressure on the cover plate 28. Under the reset action of the extension spring 26, the cover plate 28 drives the suspension rod 45, the slider 46 and the L-shaped plate 50 to rise upward, so that the L-shaped plate 50 fits tightly with the cantilever 23, thereby completing the installation and fixation of the expansion cavity 27. S5. Disassembly preparation: When disassembling the expansion chamber 27, first press down the cover plate 28 to compress the extension spring 26 again; S6. Unlock: The two dovetail plates 54 are driven to move closer to each other, causing the locking pin 55 to disengage from the locking hole of the slider 46, thereby releasing the fixed connection between the push block 49 and the slider 46. S7, Disengagement from the cantilever: Under the reset action of the return spring 48, the slider 46 moves downward and separates the L-shaped plate 50 from the cantilever 23; then the cover plate 28 is rotated in the opposite direction, so that the L-shaped plate 50 is removed from the position below the cantilever 23. S8. Remove and replace: After releasing the limiting position between the cover plate 28 and the cantilever 23, the expansion cavity 27 is removed from the annular gap between the heat exchange cavity 25 and the buffer water tank 21 to complete the disassembly and replacement of the expansion cavity 27.

[0045] The above embodiments describe the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Modifications and variations made by those skilled in the art without departing from the spirit and scope of the invention should be within the protection scope of the appended claims.

Claims

1. An integrated heat exchange buffer expansion integrated device for an air conditioner, comprising a housing (11), characterized in that, The housing (11) houses a compressor, condenser, throttle valve, and buffer expansion heat exchange integrated assembly (20), which are connected by pipelines to form a refrigerant circulation. The buffer expansion heat exchange integrated assembly (20) includes a heat exchange chamber (25), with an inlet pipe (36) at the bottom of the heat exchange chamber (25) and connected to the upstream throttle valve, and an outlet pipe (37) at the top of the heat exchange chamber (25) and connected to the downstream compressor. A second heat exchange coil (3) is installed inside the heat exchange chamber (25). 8) The two ends of the second heat exchange coil (38) are respectively connected to the third heat exchange coil of the air conditioner indoor unit through pipelines to form a cooling water circulation; a buffer water tank (21) is connected in series in the cooling water circulation pipeline, and an expansion cavity (27) is connected in the side of the cooling water circulation pipeline; the buffer water tank (21) is a ring structure and is installed outside the heat exchange cavity (25) in a gap-fitting manner, and the expansion cavity (27) is a ring structure and is inserted between the buffer water tank (21) and the heat exchange cavity (25).

2. The integrated heat buffer expansion integrated device of claim 1, wherein, A cover plate (28) is fixed to the top of the expansion cavity (27). Two sets of cantilever arms (23) are arrayed and fixed on the outer circumference of the expansion cavity (27). Fastening components (29) that cooperate with the cantilever arms (23) are provided on the outer circumference of the cover plate (28). A quick connector is provided on the top of the buffer tank (21) and the top of the expansion cavity (27). An extension spring (26) is provided between the cover plate (28) and the top plate of the heat exchange cavity (25). The expansion cavity (27) is inserted into the annular gap between the buffer tank (21) and the heat exchange cavity (25). The fastening components (29) are fixedly connected to the cantilever arms (23) by pressing down and rotating the cover plate (28), and the quick connector is connected to the buffer tank (21) and the expansion cavity (27).

3. The integrated heat buffer expansion integrated device of claim 2, wherein, The quick connector includes a second connector (56) and a first connector (41); two sets of grooves (24) are arranged in an array on the inner circumference of the top of the buffer tank (21), and the second connectors (56) are respectively arranged in the two sets of grooves (24). The second connectors (56) in the two sets of grooves (24) are arranged in an array with the center of the buffer tank (21); the top outer circumference of the expansion cavity (27) is arranged in an array corresponding to the two sets of second connectors (56), and the first connectors (41) and the second connectors (56) are connected to form a connection; two air bladders (44) are arranged inside the cavity of the expansion cavity (27), and the air bladders (44) are connected to the first connectors (41). The interior of the expansion cavity (27) is filled with pressurized gas.

4. The integrated heat buffer expansion integrated device of claim 3, wherein, The fastening assembly (29) includes two sets of suspension rods (45), which are fixed to the outer circumferential surface of the cover plate (28). The two sets of suspension rods (45) are arranged corresponding to the cantilever (23), and the cantilever (23) has a protruding push block (34) formed on it. A through groove is provided on the suspension rod (45), and a slider (46) is slidably arranged inside the through groove. A flange for limiting the position is provided on the top of the slider (46). An avoidance groove is provided at the middle position of the bottom of the slider (46), and a push block (49) is detachably arranged on the top of the avoidance groove. A support is provided on one side of the slider (46). A guide rod (47) is provided between the support plate and the suspension rod (45). One end of the guide rod (47) is fixedly connected to the bottom end of the suspension rod (45), and the other end of the guide rod (47) slides through the support plate. A return spring (48) is slidably sleeved on the guide rod (47). The two ends of the return spring (48) are fixedly connected to the support plate and the suspension rod (45) respectively. An L-shaped plate (50) is fixedly provided at the bottom end of the slider (46). The L-shaped plate (50) is set towards the side away from the return spring (48), and the inner side of the L-shaped plate (50) forms a sloping sawtooth structure.

5. The integrated air conditioning heat exchange buffer expansion device according to claim 4, characterized in that, A sliding groove (51) with a through-end structure is provided on the slider (46). The sliding groove (51) is connected to the clearance groove of the slider (46). The push block (49) is slidably installed in the sliding groove (51). A sliding groove (52) is provided inside the end of the push block (49) away from the clearance groove. The middle part of the sliding groove (52) is a rectangular groove. The two ends of the sliding groove (52) are two sets of symmetrically arranged columnar grooves. The rectangular groove is connected to the two sets of columnar grooves. The rectangular groove passes through the push block (46). 9) And it is connected to the outside of the end away from the avoidance groove; locking pins (55) are slidably arranged in the two sets of column grooves respectively, and dovetail plates (54) are fixed at the ends of the locking pins (55). The two sets of dovetail plates (54) are slidably installed in the rectangular groove respectively, and a return spring (53) is arranged between the two sets of dovetail plates (54); locking holes are respectively opened in the inner wall of the sliding groove (51), and the two sets of locking pins (55) extend into the locking holes to form a fixed limit for the push block (49) and the slider (46).

6. The integrated air conditioning heat exchange buffer expansion device according to claim 4, characterized in that, The buffer tank (21) has an inner cavity (30) connected to an inlet (33) and an outlet (35). The inlet (33) is located at the bottom of the buffer tank (21) and is installed in the circumferential tangential direction. An annular partition (31) is provided at the top of the buffer tank (21) cavity, and a flow port (32) is opened on the annular partition (31). The two second connectors (56) and the outlet (35) are located between the annular partition (31) and the top plate of the buffer tank (21). The two second connectors (56) are located on both sides of the flow port (32), and the outlet (35) is located at the end away from the flow port (32).

7. The integrated air conditioning heat exchange buffer expansion device according to claim 1, characterized in that, The second heat exchange coil (38) has an inlet pipe (39) and an outlet pipe (40). The inlet (33) of the buffer water tank (21) is connected to the cooling water return end of the air conditioner indoor unit through a pipeline. The outlet (35) of the buffer water tank (21) is connected to the inlet pipe (39) of the second heat exchange coil (38) through a pipeline. The outlet pipe (40) of the second heat exchange coil (38) is connected to the cooling water inlet end of the air conditioner indoor unit through a pipeline.

8. The integrated air conditioning heat exchange buffer expansion device according to claim 1, characterized in that, The housing (11) includes a first chamber (12), a second chamber (13), and a third chamber (14) connected in sequence; the first chamber (12) is equipped with a condenser, which includes a first heat exchange coil (16), heat exchange fins (17), and a fan (18); one end of the first heat exchange coil (16) is connected to the upstream compressor (19), and the other end of the first heat exchange coil (16) is connected to the downstream throttle valve; the second chamber (13) includes upper and lower chambers, and the lower chamber (15) of the second chamber (13) is equipped with a circulation pump, a throttle valve, and a pipeline interface, and the circulation pump includes a first circulation pump and a second circulation pump; the upper chamber of the second chamber (13) is equipped with a buffer expansion heat exchange integrated assembly; the third chamber (14) is equipped with a compressor, a separator, a four-way valve, and a capacitor.

9. The integrated air conditioning heat exchange buffer expansion device according to claim 3, characterized in that, An exposed groove (43) is provided on the cover plate (28) corresponding to the groove (24) of the buffer water tank (21), and the exposed groove (43) facilitates the exposure of the internal structure of the groove (24); a slot (42) is provided at the center of the cover plate (28) to facilitate the passage of the pipeline; an annular groove is opened at the bottom end of the cover plate (28) to limit the extension spring (26).

10. A method for replacing an expansion cavity, applied to the integrated air conditioning heat exchange buffer expansion device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the extension spring (26) at the top of the heat exchange chamber (25) and align the expansion chamber (27) with the annular gap between the heat exchange chamber (25) and the buffer tank (21); S2, the lower cover plate (28) compresses the extension spring (26), causing the expansion cavity (27) to be inserted downward along the annular gap to the predetermined position; S3. Rotate the cover plate (28) so that the first joint (41) and the second joint (56) are set in correspondence, and at the same time drive the suspension rod (45), the slider (46) and the L-shaped plate (50) to rotate synchronously, so that the L-shaped plate (50) moves to below the cantilever (23). S4. Push the push block (34) against the support block (49), causing the slider (46) and L-shaped plate (50) to move upward, so that the L-shaped plate (50) abuts against the cantilever (23). Then, release the downward pressure on the cover plate (28), and under the reset action of the extension spring (26), lock the L-shaped plate (50) and the cantilever (23) together, thereby completing the installation of the expansion cavity (27). S5. When disassembling, press down the cover plate (28) to compress the extension spring (26), drive the dovetail plate (54) to move so that the locking pin (55) disengages from the locking hole of the slider (46) to release the lock between the push block (49) and the slider (46). S6. Under the action of the return spring (48), the slider (46) and L-shaped plate (50) are moved down and separated from the cantilever (23). The cover plate (28) is rotated in the opposite direction. Then the expansion cavity (27) is removed from between the heat exchange cavity (25) and the buffer water tank (21) to complete the replacement.

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