Delay self-adjusting type throttling refrigerator and method thereof
By using the technology of delayed self -modulating self -modulating refrigerators in the throwing refrigerator, the design of the delayed valve and the mobile valve core solves the problem of high probability of automatic adjustment mechanism in the existing technology and the difficulty of technology. The effect of large flow start and small traffic maintenance.
Patent Information
- Application Number
- CN202411601158.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-01-28
AI Technical Summary
The automatic adjustment mechanism of the existing throttling refrigerator has problems such as high failure probability, high process difficulty, and insensitive self-adjustment, making it difficult to effectively maintain small flow refrigeration.
Using a delayed self -modulating chip refrigerator, by setting up a delayed valve in the refrigeration, using the mobile valve core and a delayed reset mechanism to achieve high -pressure work -quality delay release and return, adjust the opening of the streaming holes Combine, realize large flow start and small traffic maintenance.
The large flow of the annotation refrigerator is quickly started and the small flow is maintained. It has the advantages of simple structure, accurate delay control, long service life, good refrigeration effect, and stable temperature.
Smart Images
Figure CN119374264A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a refrigerator, in particular to a time-delay self-adjusting throttling refrigerator and a method thereof, belonging to the technical field of throttling refrigeration. Background Art
[0002] In the prior art, when the throttling refrigerator is started with a large flow rate and reaches the refrigeration temperature, in order to maintain the stable operation of the refrigerator with a small flow rate, it is necessary to install an automatic adjustment mechanism inside the throttling refrigerator to maintain the working state of the small flow rate. The existing automatic adjustment mechanism usually uses temperature-sensitive components such as an inflatable bellows as core components. After the refrigeration temperature reaches the requirement, the valve needle located above the throttling nozzle is driven by the automatic adjustment mechanism to move toward the throttling nozzle, thereby reducing the area of the throttling nozzle and realizing low-flow refrigeration. In addition to the inflatable bellows, the existing automatic adjustment mechanism also includes temperature-sensitive parts of memory alloys and bimetallic materials, which have the following shortcomings: the inflatable package has a certain failure probability, which affects the storage life of the automatically adjusted throttling refrigerator. At the same time, the inflatable package also increases the process difficulty. In addition, the temperature-sensitive parts using memory alloys and bimetallic materials generally have problems such as small deformation, insensitive self-adjustment, inconsistent temperature change points, etc., which are difficult to adapt to engineering applications. Therefore, it is necessary to improve the prior art. Summary of the invention
[0003] In order to solve the problems of high failure probability, high process difficulty, and insensitive self-adjustment of the automatic adjustment mechanism used in the existing throttling refrigerator, one object of the present invention is to provide a delayed self-adjusting throttling refrigerator. Another object of the present invention is to provide a method for delayed self-adjusting throttling refrigeration based on the delayed self-adjusting throttling refrigerator.
[0004] The first objective of the present invention is achieved through the following technical solutions: a delayed self-adjusting throttling refrigerator, a refrigeration dewar, and a delay valve arranged in the refrigeration dewar, characterized in that the delay valve includes a valve body, and a cooling chamber is arranged between the refrigeration dewar and the valve body, a cavity is arranged in the valve body, and a movable valve core with a delayed reset mechanism thereon is arranged in the cavity, the movable valve core divides the cavity into an input chamber and an output chamber that can be connected or disconnected, the input chamber is connected to the high-pressure working medium input port through a heat exchange tube wound around the valve body and placed in the cooling chamber, the input chamber is also connected to the cooling chamber through a small throttling hole arranged on the valve body, the input chamber is connected to the buffer chamber in the movable valve core through the delay hole on the movable valve core, the output chamber is connected to the cooling chamber through a large flow hole arranged on the valve body, and the cooling chamber is connected to the low-pressure working medium output port.
[0005] The valve body is configured as a cylinder, and the shape of the cavity axially arranged at the inner end of the valve body is adapted to the movable valve core, the large throttling hole and the small throttling hole are arranged at the inner end of the valve body, and the high-pressure working fluid inlet and the low-pressure working fluid outlet are arranged at the outer end of the valve body, so as to support and install the heat exchange tube 11 outside it and the movable valve core inside it through the valve body 7.
[0006] The movable valve core is set as a cylinder, and the inner end of the movable valve core is provided with a convex head with an inclined end portion matched with the conical output cavity at the inner end of the valve body cavity, and the outer periphery of the convex head is placed in the cylindrical input cavity.
[0007] The time-delay reset mechanism on the movable valve core comprises: a hollow sleeve arranged at the outer end of the movable valve core, the hollow sleeve is placed in a cylindrical cavity in the middle of the valve body, the hollow sleeve contains a buffer cavity, the buffer cavity is connected with the input cavity on the valve body through a time-delay hole arranged on the side wall of the convex head, a plurality of through holes connecting the cavity and the buffer cavity are arranged on the side wall of the hollow sleeve, a reset spring is sleeved on the hollow sleeve, so that when the high-pressure working medium in the input cavity of the valve body enters the buffer cavity in the valve core through the time-delay hole and the plurality of through holes, the pressure of the buffer cavity rises after a certain delay time, and finally the pressure in the buffer cavity is close to and lower than the pressure in the input cavity and the pressure in the cooling cavity by the spring force, the movable valve core moves inwardly and returns to its position under the action of the spring, so that the large throttling hole is closed, and then the high-pressure working medium in the input cavity flows into the cooling cavity only through the small throttling hole at a small flow rate, so as to maintain the refrigeration of the Dewar 1, and realize the large flow start and small flow maintenance of the throttling refrigerator.
[0008] The valve core is sleeved with a sealing ring so as to ensure the sealing ability between the valve core and the valve body through the sealing ring.
[0009] The heat exchange tube is wound around the outer wall of the valve body and placed in the cooling cavity, so that the high-pressure working medium is introduced into the input cavity in the valve body through the heat exchange tube to push the movable valve core to move.
[0010] The aperture of the small throttling hole is smaller than that of the large throttling hole, so that the high-pressure working medium in the input cavity can continuously enter the cooling cavity at a small flow rate, thereby satisfying the throttling refrigerator to perform cooling under the condition of a small flow working medium.
[0011] The aperture of the time-delay hole is set to be different according to the needs, so as to adjust the reset time of the valve core according to the needs, thereby realizing the regulation of the throttling refrigerator.
[0012] The second object of the present invention is achieved by the following technical solution: a method for delayed self-adjusting flow refrigeration based on a delayed self-adjusting throttling refrigerator, characterized by comprising the following steps: (1) High-pressure working fluid enters the heat exchange tube through the high-pressure working fluid input port, and then is sent into the input chamber in the valve body, increasing the pressure of the input chamber; (2) The pressure generated by the high-pressure working fluid in the input chamber overcomes the spring force in the delayed reset mechanism, driving the movable valve core to move outward, causing the convex head at the inner end of the movable valve core to leave the tapered output chamber at the inner end of the valve body, so that the input chamber and the output chamber are connected, allowing the high-pressure working fluid to enter the output chamber from the input chamber and then quickly flow into the cooling chamber through the large throttling hole, causing the temperature of the refrigeration Dewar to drop sharply, completing the large-flow rapid start-up of the throttling refrigerator; (3) While step (2) is being performed, the high-pressure working fluid in the input chamber will enter the buffer chamber through the delay hole on the movable valve core, and the pressure in the buffer chamber will continue to increase with a delay. Finally, when the pressure in the buffer chamber is close to the pressure in the input chamber and the pressure in the cooling chamber and is lower than the spring force, the movable valve core moves inward under the action of the spring and returns to its original position, while closing the large throttle hole; (4) After the large throttle hole in step (3) is closed, the high-pressure working fluid in the input chamber flows into the cooling chamber only through the small throttle hole at a small flow rate, maintaining the refrigeration of the Dewar, and at the same time is converted into a low-pressure working fluid, and heat is exchanged with the high-pressure working fluid in the heat exchange tube in the cooling chamber, thereby maintaining a small flow rate of the throttling refrigerator.
[0013] The present invention has the following advantages and effects: by adopting the above scheme, high-pressure working fluid can be conveniently transported into the valve body through the heat exchange tube to drive the valve core to move and open the valve, thereby allowing the high-pressure working fluid to quickly enter the cooling chamber, causing the temperature of the refrigeration Dewar to drop sharply, thereby completing the large-flow rapid start-up of the throttling refrigerator. At the same time, the high-pressure working fluid pressure in the input chamber is delayed to drop through the time-delay reset mechanism and the valve core is pushed to move back to close the valve. The high-pressure working fluid only flows into the cooling chamber through the small throttling hole, and the refrigeration demand of the refrigeration Dewar is maintained at a small flow rate, thereby realizing the large-flow start-up and small-flow maintenance of the throttling refrigerator. The present invention has the advantages of simple structure, accurate time-delay control, long service life, good refrigeration effect, stable temperature, and can meet the needs of large-flow start-up and small-flow maintenance of the throttling refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0015] Figure 1 It is a structural diagram of the present invention. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example
[0017] The time-delay self-adjusting throttling refrigerator provided by the present invention comprises a refrigeration dewar 1 and a time-delay valve arranged in the refrigeration dewar 1, wherein: the time-delay valve comprises a valve body 7, and a cooling chamber 2 is arranged between the refrigeration dewar 1 and the valve body 7, a cavity 12 is arranged in the valve body 7, a movable valve core 9 with a time-delay reset mechanism is arranged in the cavity 12, the movable valve core 9 divides the cavity 12 into an input chamber 8 and an output chamber 5 which can be connected or disconnected, the input chamber 8 is connected to a high-pressure working medium input port 16 through a heat exchange tube 11 wound around the valve body 7 and arranged in the cooling chamber 2, the input chamber 8 is also connected to the cooling chamber 2 through a small throttling hole 3 arranged on the valve body 7, the input chamber 8 is further connected to a buffer chamber 19 in the movable valve core 9 through a time-delay hole 20 on the movable valve core 9, the output chamber 5 is connected to the cooling chamber 2 through a large flow hole 4 arranged on the valve body 7, and the cooling chamber 2 is connected to the low-pressure working medium The output port 17 is connected; so that the external high-pressure working medium can be sent to the input chamber 8 in the valve body 7 through the high-pressure working medium input port 16 through the heat exchange tube 11, so that the high-pressure working medium pushes the movable valve core 9 to move outward until the disconnected input chamber 8 and the output chamber 5 are connected, so that the high-pressure working medium quickly enters the cooling chamber 2 through the large flow hole 4, so that the temperature of the refrigeration Dewar 1 drops sharply, and then the large-flow rapid start of the throttling refrigerator is completed. At the same time, the high-pressure working medium in the input chamber 8 is received through the delayed reset mechanism, and when the pressure of the high-pressure working medium in the input chamber 8 is close to the pressure of the cooling chamber 2 and lower than the pressure of the delayed reset mechanism, the movable valve core 9 is pushed to move back to the position, so that after the input chamber 8 and the output chamber 5 are disconnected, the high-pressure working medium in the input chamber 8 only flows into the cooling chamber 2 through the small throttling hole 3, and the refrigeration demand of the refrigeration Dewar 1 is maintained with a small flow rate, so as to realize the large-flow start and small-flow maintenance of the throttling refrigerator; The valve body 7 is set as a cylinder, and the shape of the cavity 12 axially arranged at the inner end of the valve body 7 is adapted to the movable valve core 9, the large throttle hole 4 and the small throttle hole 3 are arranged at the inner end of the valve body 7, and the high-pressure working medium input port 16 and the low-pressure working medium output port 17 are arranged at the outer end of the valve body 7, so that the heat exchange tube 11 outside the valve body 7 and the movable valve core 9 inside the valve body 7 can be carried and installed through the valve body 7; The movable valve core 9 is set as a cylinder, and the inner end of the movable valve core 9 is provided with a convex head 6 with an inclined end portion that matches the tapered output cavity 5 at the inner end of the cavity 12 of the valve body 7, and the outer periphery of the convex head 6 is placed in the cylindrical input cavity 8; The time-delay reset mechanism on the movable valve core 9 comprises: a hollow sleeve 15 arranged at the outer end of the movable valve core 9, the hollow sleeve 15 is placed in a cylindrical cavity 18 in the middle of the valve body 7, a buffer cavity 19 is arranged in the hollow sleeve 15, the buffer cavity 19 is connected with the input cavity 8 on the valve body 7 through a time-delay hole 20 arranged on the side wall of the protrusion 6, a plurality of through holes 13 are arranged on the side wall of the hollow sleeve 15 to connect the cavity 12 and the buffer cavity 19, and a reset spring 14 is sleeved on the hollow sleeve 15 so that the high-pressure working medium in the input cavity 8 of the valve body 7 can be discharged through the time-delay hole 20. 0. When multiple through holes 13 enter the buffer chamber 19 in the valve core 9, the pressure of the buffer chamber 19 rises after a certain delay time, and finally the pressure in the buffer chamber 19 is close to the pressure of the input chamber 8 and the pressure of the cooling chamber 2 and is lower than the force of the spring 14, so that the movable valve core 9 moves inward and returns to its position under the action of the spring 14, so that the large throttle hole 4 is closed, and then the high-pressure working medium in the input chamber 8 only flows into the cooling chamber 2 through the small throttle hole 3 at a small flow rate to maintain the refrigeration of the Dewar 1, so as to realize the large flow start and small flow maintenance of the throttling refrigerator; A sealing ring 10 is provided on the movable valve core 9 so as to ensure a sealed connection between the valve core 9 and the cavity 12 of the valve body 7 through the sealing ring 10; The heat exchange tube 11 is wound around the outer wall of the valve body 7 and placed in the cooling chamber 2, so that the high-pressure working medium is introduced into the input chamber 8 in the valve body 7 through the heat exchange tube 11, so as to push the movable valve core 9 to move; The aperture of the small throttle hole 3 is smaller than that of the large throttle hole 4, so that the high-pressure working medium in the input chamber 8 can continuously enter the cooling chamber 2 at a small flow rate, so that the throttling refrigerator can perform cooling under the condition of a small flow rate working medium; The aperture of the time-delay hole 20 is set according to actual needs, so as to adjust the reset time of the movable valve core 9 according to needs, thereby realizing the regulation of the throttling refrigerator.
[0018] The present invention provides a method for performing delayed self-adjusting flow refrigeration based on a delayed self-adjusting throttling refrigerator, comprising the following steps: (1) The high-pressure working fluid enters the heat exchange tube 11 through the high-pressure working fluid input port 16, and is then sent into the input chamber 8 in the valve body 7, increasing the pressure of the input chamber 8; (2) The pressure generated by the high-pressure working medium in the input chamber 8 overcomes the force of the spring 14 in the delayed reset mechanism, driving the movable valve core 9 to move rightward, so that the protrusion 6 at the inner end of the movable valve core 9 leaves the tapered output chamber 5 at the inner end of the valve body 7, so that the input chamber 8 and the output chamber 5 are connected, allowing the high-pressure working medium to enter the output chamber 5 from the input chamber 8 and then quickly flow into the cooling chamber 2 through the large throttling hole 4, causing the temperature of the refrigeration dewar 1 to drop sharply, completing the large-flow rapid start-up of the throttling refrigerator; (3) While step (2) is being performed, the high-pressure working fluid in the input chamber 8 will enter the buffer chamber 19 through the delay hole 20 on the movable valve core 19, and the pressure in the buffer chamber 19 will continue to increase with a delay. When the pressure in the buffer chamber 19 is finally close to the pressure in the input chamber 8 and the pressure in the cooling chamber 2 and is lower than the force of the spring 14, the movable valve core 9 will move inward and return to its original position under the action of the spring 14, so that the large throttle hole 4 is closed; (4) After the large throttle hole 4 in step (3) is closed, the high-pressure working fluid in the input chamber 8 flows into the cooling chamber 2 only through the small throttle hole 3 at a small flow rate, maintaining the refrigeration of the Dewar 1, and at the same time is converted into a low-pressure working fluid, and heat is exchanged with the high-pressure working fluid in the heat exchange tube 11 in the cooling chamber 2, thereby maintaining a small flow rate of the throttling refrigerator.
[0019] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0020] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A time-delay self-adjusting throttling refrigerator, a refrigeration dewar, and a time-delay valve arranged in the refrigeration dewar, characterized in that The time-delay valve comprises a valve body, and a cooling cavity is arranged between the refrigeration dewar and the valve body. A cavity is arranged in the valve body, and a movable valve core with a time-delay reset mechanism is arranged in the cavity. The movable valve core divides the cavity into an input cavity and an output cavity which can be connected or disconnected. The input cavity is connected to a high-pressure working medium input port through a heat exchange tube wound around the valve body and placed in the cooling cavity. The input cavity is also connected to the cooling cavity through a small throttling hole arranged on the valve body. The input cavity is further connected to a buffer cavity in the movable valve core through a time-delay hole on the movable valve core. The output cavity is connected to the cooling cavity through a large flow hole arranged on the valve body, and the cooling cavity is connected to a low-pressure working medium output port.
2. The time-delay self-adjusting throttling refrigerator according to claim 1 is characterized in that The valve body is set as a cylinder, the shape of the cavity axially arranged at the inner end of the valve body is adapted to the movable valve core, the large throttle hole and the small throttle hole are arranged at the inner end of the valve body, and the high-pressure working fluid input port and the low-pressure working fluid output port are arranged at the outer end of the valve body.
3. The time-delay self-adjusting throttling refrigerator according to claim 1 is characterized in that The movable valve core is set as a cylinder, and the inner end of the movable valve core is provided with a convex head with an inclined end portion matched with the conical output cavity at the inner end of the valve body cavity, and the outer periphery of the convex head is placed in the cylindrical input cavity.
4. The time-delay self-adjusting throttling refrigerator according to claim 1 is characterized in that The time-delay reset mechanism on the movable valve core comprises: a hollow sleeve arranged at the outer end of the movable valve core, the hollow sleeve is placed in a cylindrical cavity in the middle of the valve body, the hollow sleeve is a buffer cavity, the buffer cavity is connected with the input cavity on the valve body through a time-delay hole arranged on the side wall of the convex head, a plurality of through holes connecting the cavity and the buffer cavity are arranged on the side wall of the hollow sleeve, and a reset spring is sleeved on the hollow sleeve.
5. The time-delay self-adjusting throttling refrigerator according to claim 1 is characterized in that A sealing ring is sleeved on the valve core.
6. A method for delayed self-adjusting throttling refrigeration based on the delayed self-adjusting throttling refrigerator according to claim 1, characterized in that The following steps are involved: (1) High-pressure working fluid enters the heat exchange tube through the high-pressure working fluid input port, and then is sent into the input chamber in the valve body, increasing the pressure of the input chamber; (2) The pressure generated by the high-pressure working fluid in the input chamber overcomes the spring force in the delayed reset mechanism, driving the movable valve core to move outward, causing the convex head at the inner end of the movable valve core to leave the tapered output chamber at the inner end of the valve body, so that the input chamber and the output chamber are connected, allowing the high-pressure working fluid to enter the output chamber from the input chamber and then quickly flow into the cooling chamber through the large throttling hole, causing the temperature of the refrigeration Dewar to drop sharply, completing the large-flow rapid start-up of the throttling refrigerator; (3) While step (2) is being performed, the high-pressure working fluid in the input chamber will enter the buffer chamber through the delay hole on the movable valve core, and the pressure in the buffer chamber will continue to increase with a delay. Finally, when the pressure in the buffer chamber is close to the pressure in the input chamber and the pressure in the cooling chamber and is lower than the spring force, the movable valve core moves inward under the action of the spring and returns to its original position, while closing the large throttle hole; (4) After the large throttle hole in step (3) is closed, the high-pressure working fluid in the input chamber flows into the cooling chamber only through the small throttle hole at a small flow rate, maintaining the refrigeration of the Dewar, and at the same time is converted into a low-pressure working fluid, and heat is exchanged with the high-pressure working fluid in the heat exchange tube in the cooling chamber, thereby maintaining a small flow rate of the throttling refrigerator.