Pressure regulating device based on countercurrent flow heat exchange and graded pressure reduction

Abstract

The invention relates to the technical field of pressure regulating devices for staged pressure reduction, in particular to a pressure regulating device based on countercurrent flow heat exchange and staged pressure reduction. And the pressure adjusting assembly comprises a first input pipe and a second input pipe which are symmetrically arranged in the box body, and a first pressure reducing valve and a first heat exchanger are fixedly installed in the first input pipe in a linear array mode. Gas-liquid two-phase flow is accurately separated through the cyclone separator, and the mixing state is monitored in real time in combination with the gas-liquid detection element; when proportion imbalance is detected (too much liquid phase causes insufficient heat exchange or too much gas phase reduces condensation efficiency), a controller automatically starts a phase splitting-mixing process, a lifting box ascends to compress a corrugated compression pipe to enable the gas phase to be atomized and sprayed into the liquid phase, and stirring teeth driven synchronously strengthen mixing uniformity; the pressure regulating element pressurizes the working medium to the pressure required by the second-stage pressure reducing valve, the problem of second-stage pressure reducing pressure fluctuation caused by gas-liquid imbalance of a traditional system is thoroughly solved, and efficient operation of the second heat exchanger is guaranteed.

Description

Technical Field

[0001] This invention relates to the technical field of pressure regulating devices for graded pressure reduction, and specifically to a pressure regulating device based on countercurrent heat exchange and graded pressure reduction. Background Technology

[0002] A pressure regulating device based on counter-current heat exchange and staged pressure reduction is a device that combines the principles of counter-current heat exchange and staged pressure reduction. It is mainly used for pressure regulation and temperature control of gases or liquids. In the multi-stage pressure reduction process of a refrigeration system, high-temperature and high-pressure refrigerant (e.g., 80℃, 2MPa) is liquefied by the condenser to form a high-pressure liquid working fluid (approximately 45℃, 2MPa). It then enters the first-stage pressure reducing valve for initial pressure reduction (2MPa→1.2MPa) and temperature reduction (45℃→10℃). However, due to the sudden pressure change during the pressure reduction process, some liquid refrigerant will flash into gas, forming a gas-liquid two-phase mixed flow. This two-phase flow often experiences gas-liquid ratio imbalance due to factors such as pipe friction, refrigerant charge fluctuations, or valve core wear. An excessively high liquid phase ratio (insufficient gas) prevents subsequent heat exchangers (such as the second heat exchanger 205) from absorbing heat and vaporizing sufficiently, resulting in insufficient cooling temperature drop. Conversely, an excessively high gas phase ratio (insufficient liquid) significantly reduces heat exchange efficiency, leading to incomplete condensation. Traditional systems lack a dynamic control mechanism for the gas-liquid ratio and rely solely on pipelines to directly deliver the mixed fluid to the secondary pressure reducing valve. When the gas-liquid ratio is abnormal, the outlet pressure of the primary pressure reducing valve fluctuates significantly, which in turn leads to unstable pressure in the secondary pressure reducing process (such as below 0.5 MPa), ultimately affecting the overall energy efficiency of the refrigeration cycle. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a pressure regulating device based on countercurrent heat exchange and staged pressure reduction, which can effectively solve the problem of pressure fluctuations that cannot be effectively controlled during multi-stage pressure reduction in existing technologies.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a pressure regulating device based on countercurrent heat exchange and staged pressure reduction, comprising: Box; The pressure regulating assembly includes a first input pipe and a second input pipe symmetrically arranged inside the housing. A first pressure reducing valve and a first heat exchanger are fixedly installed in a linear array inside the first input pipe, and a second pressure reducing valve and a second heat exchanger are fixedly installed in a linear array inside the second input pipe. Phase separation assembly, the phase separation assembly including cyclone separators symmetrically arranged above the first heat exchanger, the cyclone separators being used to separate gaseous condensate and liquid condensate; A mixing output assembly includes a fixed box symmetrically arranged above a first heat exchanger, a lifting box slidably installed inside the fixed box, a corrugated compression tube fixedly installed inside the fixed box and above the lifting box, the lower end of the corrugated compression tube communicating with the lifting box, nozzles symmetrically embedded in the inner bottom end of the corrugated compression tube, and stirring teeth symmetrically rotatably installed in the inner bottom end of the lifting box.

[0005] Preferably, a guide pipe is symmetrically connected between the first input pipe and the second input pipe. A first solenoid valve is fixedly installed inside the guide pipe. A pressure detection element is fixedly installed inside the first input pipe at a position away from the first pressure reducing valve. A gas-liquid detection element is fixedly installed on the inner wall of the lifting box. The gas-liquid detection element, the pressure detection element, and the first solenoid valve are electrically connected to a controller.

[0006] Preferably, one end of the first input pipe is symmetrically connected to a diversion pipe, and a second solenoid valve is fixedly installed inside the diversion pipe. The second solenoid valve is electrically connected to the controller. One end of the diversion pipe is connected to a cyclone separator, and the lower end of the cyclone separator is connected to an inlet pipe. One end of the inlet pipe is connected to a turbine infusion machine, and the turbine infusion machine is electrically connected to the controller. The output end of the turbine infusion machine is connected to a delivery pipe. A fixed frame is provided above the first heat exchanger, and an air bladder is fixedly installed on the inner wall of the fixed frame. On-off valves are fixedly installed at the upper and lower ends of the air bladder and are electrically connected to the controller. One end of the delivery pipe passes through the fixed frame and is connected to one of the on-off valves. The other on-off valve is connected to a hose, and a first check valve is fixedly installed inside the hose. One end of the hose passes through a fixed box and is connected to a lifting box.

[0007] Preferably, an external frame is fixedly installed on one side of the fixed frame, and a fixed plate is symmetrically installed on one side of the external frame. A rotary drive component is fixedly installed on one side of the fixed plate. The rotary drive component is electrically connected to the controller. A relative screw is rotatably installed between the fixed plates. A movable plate is symmetrically threaded on the outer wall of the relative screw. The output end of the rotary drive component passes through the fixed plate and is fixedly connected to the relative screw. An extrusion plate is symmetrically installed on the inner wall of the fixed frame and on the outer wall of the airbag. One end of the movable plate is fixedly connected to the extrusion plate.

[0008] Preferably, the upper end of the cyclone separator is connected to an air inlet pipe, one end of which passes through a fixed box and is connected to a corrugated compression pipe, and a second check valve is fixedly installed inside the air inlet pipe.

[0009] Preferably, a lifting drive device is fixedly installed on one side of the fixed box. The lifting drive device is electrically connected to the controller. A connector is fixedly installed at the output end of the lifting drive device. The connector is fixedly connected to the upper end surface of the lifting box.

[0010] Preferably, a threaded rod is rotatably mounted on the inner bottom end of the fixed box, and a toothed head is rotatably mounted on the inner bottom end of the lifting box. The upper end of the threaded rod passes through the lifting box and extends into the interior. The toothed head is threadedly connected to the outer wall of the threaded rod. A toothed disc is symmetrically rotatably mounted on the inner bottom end of the lifting box. The toothed disc meshes with the toothed head. A stirring tooth is fixedly mounted on the upper end of the toothed disc.

[0011] Preferably, a U-shaped flexible conduit is embedded in the lower end face of the fixed box, the upper end of the U-shaped flexible conduit passes through the fixed box and communicates with the lifting box, a third solenoid valve is fixedly installed inside the U-shaped flexible conduit, a main pipe is connected to the outer wall of the U-shaped flexible conduit, a pressure regulating element is fixedly installed inside the main pipe, and the pressure regulating element is electrically connected to the controller.

[0012] The technical solution provided by this invention has the following advantages compared with the known prior art: First, the gas-liquid two-phase flow is accurately separated by a cyclone separator, and the mixing state is monitored in real time by a gas-liquid detection element. When a proportional imbalance is detected (too much liquid phase leads to insufficient heat exchange or too much gas phase reduces condensation efficiency), the controller automatically starts the phase separation-mixing process. The lifting box rises and compresses the corrugated compression pipe to atomize the gas phase and spray it into the liquid phase. The synchronously driven stirring teeth enhance the mixing uniformity. The pressure regulating element pressurizes the working fluid to the pressure required by the secondary pressure reducing valve, completely eliminating the problem of pressure fluctuation in the secondary pressure reducing valve caused by gas-liquid imbalance in traditional systems, and ensuring the efficient operation of the second heat exchanger.

[0013] Second, the symmetrically designed phase-separating components and mixing output components work alternately: while one group performs the separation, storage, and mixing processes, the other group is on standby, achieving uninterrupted system operation. The counter-current heat exchanger, combined with the staged pressure reduction mechanism, makes full use of the cold storage tank's cooling capacity and the air conditioning return water cooling (such as the cold storage water temperature dropping from 12℃ to 10℃), maximizing cold energy recovery. At the same time, by dynamically adjusting the gas-liquid ratio and pressure stability, the overall energy efficiency of the refrigeration cycle is significantly improved. Attached Figure Description

[0014] 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. Obviously, 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 these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the voltage regulating component of the present invention; Figure 3 This is a schematic diagram of the phase-splitting component of the present invention; Figure 4 This is a schematic diagram of the cyclone separator of the present invention; Figure 5 This is an exploded structural diagram of the fixing frame of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixing box of the present invention; Figure 7 This is an exploded structural diagram of the lifting box of the present invention.

[0016] Reference numerals: 1. Housing; 2. Pressure regulating assembly; 201. First input pipe; 202. First pressure reducing valve; 203. First heat exchanger; 204. Second pressure reducing valve; 205. Second heat exchanger; 206. Second input pipe; 207. Guide pipe; 3. Phase separation assembly; 301. Diverter pipe; 302. Cyclone separator; 303. Inlet pipe; 304. Turbine infusion machine; 305. Delivery pipe; 306. Fixing frame; 307. Airbag; 308. On / off valve; 309. External frame; 310. 311. Fixed plate; 312. Relative screw; 313. Moving plate; 314. Rotary drive component; 315. Extrusion plate; 316. Hose; 4. Mixing output assembly; 401. Fixed box; 402. Lifting box; 403. Lifting drive device; 404. Connector; 405. Threaded rod; 406. Tooth head; 407. Tooth disc; 408. Stirring tooth; 409. Corrugated compression pipe; 410. Inlet pipe; 411. Nozzle; 412. U-shaped flexible conduit; 413. Main pipe; 414. Pressure regulating element. Detailed Implementation

[0017] 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to embodiments.

[0019] Example: Refer to Figures 1 to 7 A pressure regulating device based on countercurrent heat exchange and staged pressure reduction includes: Box 1; The pressure regulating component 2 includes a first input pipe 201 and a second input pipe 206 symmetrically arranged in the housing 1. A first pressure reducing valve 202 and a first heat exchanger 203 are fixedly installed in a linear array in the first input pipe 201. A second pressure reducing valve 204 and a second heat exchanger 205 are fixedly installed in a linear array in the second input pipe 206. Phase separation component 3 includes a cyclone separator 302 symmetrically arranged above the first heat exchanger 203. The cyclone separator 302 is used to separate the gas phase condenser and the liquid phase condenser. The mixing output component 4 includes a fixed box 401 symmetrically arranged above the first heat exchanger 203. A lifting box 402 is slidably installed inside the fixed box 401. A corrugated compression tube 409 is fixedly installed inside the fixed box 401 and above the lifting box 402. The lower end of the corrugated compression tube 409 is connected to the lifting box 402. A nozzle 411 is symmetrically embedded in the inner bottom end of the corrugated compression tube 409. A stirring tooth 408 is symmetrically rotatably installed in the inner bottom end of the lifting box 402.

[0020] A guide pipe 207 symmetrically connects the first input pipe 201 and the second input pipe 206. A first solenoid valve is fixedly installed inside the guide pipe 207 and is normally open. When the pressure detection element detects that the pressure is lower than a set threshold, it closes, cutting off the main passage. A pressure detection element is fixedly installed inside the first input pipe 201 at a position away from the first pressure reducing valve 202. The pressure detection element is an existing device that uses a strain gauge type detection element. The core is a metal strain gauge or a semiconductor strain gauge, which is attached to the surface of an elastic element (such as a diaphragm or cantilever beam). When pressure is applied to the elastic element and it deforms, the resistance value of the strain gauge changes accordingly. This change is controlled by a Wheatstone bridge. The resistance change can be converted into a voltage signal output. A gas-liquid detection element is fixedly installed on the inner wall of the lifting box 402. The gas-liquid detection element is an existing device. The gas-liquid detection element is fixedly installed on the inner wall of the lifting box 402 to monitor the mixing state of the gas and liquid working fluid in the box in real time. When the gas phase and liquid phase ratio reaches a preset uniform value, an electrical signal is generated and transmitted to the controller. The controller controls the third solenoid valve to open based on the signal, so that the mixed working fluid is output through the U-shaped flexible conduit 412, and at the same time stops the operation of the lifting drive device 403. If the mixing ratio does not meet the standard, the lifting and mixing process continues to be executed until the gas-liquid detection element feeds back a standard signal. The gas-liquid detection element, the pressure detection element, and the first solenoid valve are electrically connected to the controller.

[0021] One end of the first input pipe 201 is symmetrically connected to a diversion pipe 301. A second solenoid valve is fixedly installed inside the diversion pipe 301 and is interlocked with the first solenoid valve: when the first solenoid valve is closed, it opens to guide the abnormal working fluid to the cyclone separator 302. The second solenoid valve is electrically connected to the controller. One end of the diversion pipe 301 is connected to the cyclone separator 302. The cyclone separator 302 is an existing device with a conical cylindrical structure. Its tangential inlet design facilitates the formation of a gas-liquid mixture. High-speed cyclone separation: Under centrifugal force, the liquid phase flows down the wall of the separator to the inlet pipe 303, and is pumped into the air bag 307 for temporary storage by the turbine pump 304. The gas phase gathers towards the center and rises to the air inlet pipe 410, and is then transported to the corrugated compression pipe 409 for storage. This separation process achieves complete isolation between the gas and liquid phases, providing an independent phase source for the precise proportional recombination of the mixing output component 4, and fundamentally solving the problem of pressure fluctuation in the secondary decompression caused by the imbalance of gas and liquid ratio. The lower end of the cyclone separator 302 is connected to the inlet pipe 303. One end of 303 is connected to a turbine infusion machine 304. The inlet of the turbine infusion machine 304 is connected to the liquid phase outlet separated by the cyclone separator 302, and the outlet is connected to the delivery pipe 305. When the controller detects an abnormal pressure and opens the second solenoid valve, the turbine infusion machine 304 is started simultaneously. The rotating turbine pumps the liquid phase into the delivery pipe 305, and through the opened on / off valve 308, it is injected into the air bag 307 for temporary storage. The turbine infusion machine 304 is electrically connected to the controller, and the output end of the turbine infusion machine 304 is connected to the delivery pipe 305. The first exchange... A fixed frame 306 is provided above the heater 203. An air bag 307 is fixedly installed on the inner wall of the fixed frame 306. An on / off valve 308 is fixedly installed at the upper and lower ends of the air bag 307. The on / off valve 308 is electrically connected to the controller. One end of the delivery pipe 305 passes through the fixed frame 306 and is connected to one of the on / off valves 308. The other on / off valve 308 is connected to a hose 315. A first check valve is fixedly installed inside the hose 315. One end of the hose 315 passes through the fixed box 401 and is connected to the lifting box 402.

[0022] An external frame 309 is fixedly installed on one side of the fixed frame 306. A fixed plate 310 is symmetrically installed on one side of the external frame 309. A rotary drive component 313 is fixedly installed on one side of the fixed plate 310. The rotary drive component 313 is electrically connected to the controller. A relative screw 311 is rotatably installed between the fixed plates 310. A movable plate 312 is symmetrically threaded on the outer wall of the relative screw 311. The output end of the rotary drive component 313 passes through the fixed plate 310 and is fixedly connected to the relative screw 311. A compression plate 314 is symmetrically installed on the inner wall of the fixed frame 306 and on the outer wall of the airbag 307. One end of the movable plate 312 is fixedly connected to the compression plate 314.

[0023] The upper end of the cyclone separator 302 is connected to the air inlet pipe 410. One end of the air inlet pipe 410 passes through the fixed box 401 and is connected to the corrugated compression pipe 409. A second check valve is fixedly installed inside the air inlet pipe 410.

[0024] A lifting drive device 403 is fixedly installed on one side of the fixed box 401. The lifting drive device 403 is an existing device. The lifting drive device 403 is used to drive the lifting box 402 to rise vertically along the inner wall of the fixed box 401. During this process, the top of the lifting box 402 squeezes the corrugated compression tube 409, forcing the stored gas phase to be atomized and sprayed into the liquid phase through the nozzle 411. The upward displacement of the lifting box 402 forces the tooth head 406 to rotate along the fixed second threaded rod 405, driving the meshing toothed disc 407 to drive the stirring tooth 408 to rotate at high speed, forcing the gas and liquid phases to mix evenly. When the gas-liquid detection element feedbacks that the mixing ratio meets the standard, the controller stops the lifting drive device 403 to complete the mixing process. The lifting drive device 403 is electrically connected to the controller. A connector 404 is fixedly installed at the output end of the lifting drive device 403. The connector 404 is fixedly connected to the upper end face of the lifting box 402.

[0025] A threaded rod 405 is rotatably mounted on the inner bottom end of the fixed box 401, and a toothed head 406 is rotatably mounted on the inner bottom end of the lifting box 402. The upper end of the threaded rod 405 passes through the lifting box 402 and extends into the interior. The toothed head 406 is threadedly connected to the outer wall of the threaded rod 405. A toothed disc 407 is symmetrically rotatably mounted on the inner bottom end of the lifting box 402. The toothed disc 407 meshes with the toothed head 406. A stirring tooth 408 is fixedly mounted on the upper end of the toothed disc 407.

[0026] A U-shaped flexible conduit 412 is embedded in the lower end face of the fixed box 401. The upper end of the U-shaped flexible conduit 412 passes through the fixed box 401 and is connected to the lifting box 402. A third solenoid valve is fixedly installed inside the U-shaped flexible conduit 412. The third solenoid valve is installed in the U-shaped flexible conduit 412 and is controlled by the gas-liquid detection element: it opens to output working fluid when the mixing ratio meets the standard, and is forcibly closed when the ratio does not meet the standard. The outer wall of the U-shaped flexible conduit 412 is connected to the main pipe 413. A pressure regulating element 414 is fixedly installed inside the main pipe 413. The pressure regulating element 414 is an electric proportional booster valve that dynamically adjusts the outlet pressure to 1.2MPa±0.05MPa through a PID algorithm. The pressure regulating element 414 is electrically connected to the controller.

[0027] The working principle of this invention is as follows: High-pressure liquid refrigerant (approximately 45°C, 2MPa) enters the first inlet pipe 201 from the condenser. As it flows through the first pressure-reducing valve 202, the pressure drops to approximately 1.2MPa, and the temperature plummets to approximately 10°C. Part of the liquid refrigerant flashes into gas, forming a gas-liquid two-phase flow. This mixed flow then enters the first heat exchanger 203 (counter-current heat exchanger) to absorb heat and heat up to approximately 15°C (simultaneously, the chilled water releases heat from approximately 12°C and cools down to approximately 10°C, storing the cold energy). At this point, if the pressure detection element detects that the pressure at the end of the first inlet pipe 201 (i.e., the first-stage pressure-reducing outlet) stabilizes at the pre-set pressure... When the pressure is near the target value (e.g., 1.2 MPa), it indicates that the gas-liquid ratio is normal. The controller keeps the first solenoid valve (inside the guide pipe 207) open and the second solenoid valve (inside the split pipe 301) closed. The mixed working fluid directly enters the second input pipe 206 through the guide pipe 207, and is further depressurized to about 0.5 MPa by the second pressure reducing valve 204. The temperature drops to about 2°C, and then it enters the second heat exchanger 205 to absorb heat and vaporize to about 7°C (at the same time, the air conditioning return water releases heat from about 8°C and cools down to about 5°C). Finally, the low-temperature gaseous refrigerant returns to the compressor. When the gas-liquid ratio at the first-stage pressure reducing outlet (after the first heat exchanger 203) becomes unbalanced due to factors such as pipe friction, refrigerant charge fluctuations, or valve core wear (e.g., excessive liquid or excessive gas phase), the pressure detection element will detect a significant pressure drop (e.g., below 1.15 MPa). After receiving the abnormal pressure signal, the controller will immediately close the first solenoid valve (blocking the guide pipe 207) and simultaneously open the second solenoid valve (opening the diversion pipe 301). At this time, the gas-liquid ratio imbalanced working fluid no longer flows to the second stage but is introduced into the diversion pipe 301 and enters the cyclone separator 302. Inside the hydrocyclone separator 302, the mixed working fluid rotates at high speed. The denser liquid phase is thrown towards the wall of the separator under the action of centrifugal force, flows downward along the wall, and is discharged through the liquid inlet pipe 303 at the lower end. The less dense gas phase gathers towards the center, flows upward, and is discharged through the air inlet pipe 410 at the upper end. The second check valve (inside the air inlet pipe 410) prevents the gas from flowing back. The separated liquid phase flows into the turbine infusion machine 304. The controller starts the turbine infusion machine 304 and pumps the liquid phase into the delivery pipe 305. At this time, the controller opens the on / off valve 308 above the airbag 307. The liquid phase is delivered and stored in the airbag 307. When the airbag 307 stores an appropriate amount of liquid phase (existing liquid level sensors can be installed for feedback), the controller closes the on / off valve 308 above the airbag 307 and opens the on / off valve 308 below. The controller activates the moving plate 312, and the rotating drive component 313 drives the relative screw 311 to rotate. The rotating relative screw 311 drives the moving plate 312 on it to move relative to each other. The moving plate 312 pushes the extrusion plate 314 to move, applying extrusion force to the airbag 307. Under the pressure, the liquid phase in the airbag 307 is smoothly pressed into the lifting box 402 for storage through the opening and closing valve 308 and the hose 315 (the first check valve prevents backflow) below. Meanwhile, the separated gas phase enters and is stored in the corrugated compression pipe 409 located above the lifting box 402 via the inlet pipe 410 and the second check valve. The controller starts the lifting drive device 403. The lifting drive device 403 drives the lifting box 402 to slide upward in the fixed box 401 through the connector 404. It should be noted that when the lifting box 402 rises, its bottom will contact and push the tooth 406 at the upper end of the threaded rod 405 to rotate relative to each other. The threaded rod 405 and the tooth 406 are connected by a non-self-locking thread, so that the tooth 406 rotates on the thread. The rotation of the tooth 406 drives the toothed disc 407 that meshes with it to rotate, thereby driving the stirring teeth 408 fixed on the toothed disc 407 to rotate. At the same time, the rise of the lifting box 402 will squeeze the upper corrugated compression pipe 409, causing it to be axially compressed. The compressed corrugated compression pipe 409 pressurizes the gas phase stored inside, forcing the gas phase to be sprayed into the liquid phase in the lower lifting box 402 in the form of a high-speed, fine mist through the nozzle 411 at its bottom. While the atomized gas phase is injected into the liquid phase, the continuously rotating stirring teeth 408 inside the lifting box 402 strongly stir the gas and liquid phases, greatly enhancing the dispersion and dissolution of the gas phase in the liquid phase and promoting the formation of a uniform and stable gas-liquid mixed working fluid. The gas-liquid detection element on the inner wall of the lifting box 402 monitors the gas-liquid ratio of the mixture in real time. When the ratio reaches the preset optimal value (i.e., uniform mixing), the controller opens the third solenoid valve in the U-shaped soft tube 412. Under the influence of gravity or internal pressure, the uniformly mixed working fluid flows into the main pipe 413 through the U-shaped flexible conduit 412. Under the action of the controller, the pressure regulating element 414 in the main pipe 413 precisely pressurizes the mixed working fluid according to the set value (such as 1.2MPa) to ensure that its pressure is stable and meets the requirements of the inlet of the second pressure reducing valve 204. The pressurized and stable gas-liquid mixed working fluid is transported to the second pressure reducing valve 204 for subsequent secondary pressure reduction (1.2MPa→0.5MPa) and heat exchange process. Since both the phase separation component 3 and the mixing output component 4 adopt a symmetrical design (two sets), when one set is performing the separation, storage, mixing, and output process, the other set is in a standby state. Once the first set completes its process, the controller can immediately switch to the other set to handle subsequent abnormal flows, or wait for the current set to finish processing and reset before receiving the next flow split. This alternating working mode enables the system to handle the gas-liquid ratio imbalance problem without interruption, ensuring the continuity of the refrigeration cycle.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure regulating device based on countercurrent heat exchange and staged pressure reduction, characterized in that, include: Box (1); The pressure regulating assembly (2) includes a first input pipe (201) and a second input pipe (206) symmetrically arranged in the housing (1). A first pressure reducing valve (202) and a first heat exchanger (203) are fixedly installed in a linear array in the first input pipe (201), and a second pressure reducing valve (204) and a second heat exchanger (205) are fixedly installed in a linear array in the second input pipe (206). Phase separation component (3), the phase separation component (3) includes a cyclone separator (302) symmetrically arranged above the first heat exchanger (203), the cyclone separator (302) is used to separate gas phase condenser and liquid phase condenser; The mixing output assembly (4) includes a fixed box (401) symmetrically arranged above the first heat exchanger (203), a lifting box (402) is slidably installed inside the fixed box (401), a corrugated compression tube (409) is fixedly installed inside the fixed box (401) and above the lifting box (402), the lower end of the corrugated compression tube (409) is connected to the lifting box (402), a nozzle (411) is symmetrically embedded in the inner bottom end of the corrugated compression tube (409), and a stirring tooth (408) is symmetrically rotatably installed in the inner bottom end of the lifting box (402).

2. The pressure regulating device based on countercurrent heat exchange and staged pressure reduction according to claim 1, characterized in that, A guide pipe (207) is symmetrically connected between the first input pipe (201) and the second input pipe (206). A first solenoid valve is fixedly installed inside the guide pipe (207). A pressure detection element is fixedly installed inside the first input pipe (201) at a position away from the first pressure reducing valve (202). A gas-liquid detection element is fixedly installed on the inner wall of the lifting box (402). The gas-liquid detection element, the pressure detection element, and the first solenoid valve are electrically connected to a controller.

3. A pressure regulating device based on countercurrent heat exchange and staged pressure reduction according to claim 1, characterized in that, One end of the first input pipe (201) is symmetrically connected to a diversion pipe (301). A second solenoid valve is fixedly installed inside the diversion pipe (301). The second solenoid valve is electrically connected to the controller. One end of the diversion pipe (301) is connected to a cyclone separator (302). The lower end of the cyclone separator (302) is connected to an inlet pipe (303). One end of the inlet pipe (303) is connected to a turbine infusion machine (304). The turbine infusion machine (304) is electrically connected to the controller. The output end of the turbine infusion machine (304) is connected to a delivery pipe (305). The first heat exchanger (203) A fixed frame (306) is provided above the airbag (307) and an airbag (307) is fixedly installed on the inner wall of the fixed frame (306). An opening and closing valve (308) is fixedly installed at the upper and lower ends of the airbag (307). The opening and closing valve (308) is electrically connected to the controller. One end of the delivery pipe (305) passes through the fixed frame (306) and is connected to one of the opening and closing valves (308). The other opening and closing valve (308) is connected to a hose (315). A first check valve is fixedly installed inside the hose (315). One end of the hose (315) passes through the fixed box (401) and is connected to the lifting box (402).

4. A pressure regulating device based on countercurrent heat exchange and staged pressure reduction according to claim 3, characterized in that, An external frame (309) is fixedly installed on one side of the fixed frame (306). A fixed plate (310) is symmetrically installed on one side of the external frame (309). A rotary drive (313) is fixedly installed on one side of the fixed plate (310). The rotary drive (313) is electrically connected to the controller. A relative screw (311) is rotatably installed between the fixed plates (310). A movable plate (312) is symmetrically threaded on the outer wall of the relative screw (311). The output end of the rotary drive (313) passes through the fixed plate (310) and is fixedly connected to the relative screw (311). A compression plate (314) is symmetrically installed on the inner wall of the fixed frame (306) and on the outer wall of the airbag (307). One end of the movable plate (312) is fixedly connected to the compression plate (314).

5. A pressure regulating device based on countercurrent heat exchange and staged pressure reduction according to claim 1, characterized in that, The upper end of the cyclone separator (302) is connected to an air inlet pipe (410). One end of the air inlet pipe (410) passes through the fixed box (401) and is connected to the corrugated compression pipe (409). A second check valve is fixedly installed inside the air inlet pipe (410).

6. A pressure regulating device based on countercurrent heat exchange and staged pressure reduction according to claim 5, characterized in that, A lifting drive device (403) is fixedly installed on one side of the fixed box (401). The lifting drive device (403) is electrically connected to the controller. A connector (404) is fixedly installed at the output end of the lifting drive device (403). The connector (404) is fixedly connected to the upper surface of the lifting box (402).

7. A pressure regulating device based on countercurrent heat exchange and staged pressure reduction according to claim 6, characterized in that, A threaded rod (405) is rotatably mounted on the inner bottom end of the fixed box (401), and a toothed head (406) is rotatably mounted on the inner bottom end of the lifting box (402). The upper end of the threaded rod (405) passes through the lifting box (402) and extends into the interior. The toothed head (406) is threadedly connected to the outer wall of the threaded rod (405). A toothed disc (407) is symmetrically rotatably mounted on the inner bottom end of the lifting box (402). The toothed disc (407) meshes with the toothed head (406). A stirring tooth (408) is fixedly mounted on the upper end of the toothed disc (407).

8. A pressure regulating device based on countercurrent heat exchange and staged pressure reduction according to claim 7, characterized in that, The lower end face of the fixed box (401) is fitted with a U-shaped flexible conduit (412). The upper end of the U-shaped flexible conduit (412) passes through the fixed box (401) and is connected to the lifting box (402). A third solenoid valve is fixedly installed inside the U-shaped flexible conduit (412). The outer wall of the U-shaped flexible conduit (412) is connected to a main pipe (413). A pressure regulating element (414) is fixedly installed inside the main pipe (413). The pressure regulating element (414) is electrically connected to the controller.

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