Constant-temperature infusion device for hysteroscopic surgery

Abstract

The invention relates to the related technical field of medical constant-temperature equipment, and discloses a constant-temperature infusion device for hysteroscopic surgery, which comprises a fixed clamping seat and two constant-temperature assemblies which are arranged on the fixed clamping seat and distributed left and right, each constant-temperature assembly comprises a heat preservation shell and a constant-temperature cylinder arranged in the heat preservation shell, and the outer wall surface of each constant-temperature cylinder is concave inwards to form a spiral groove; a heat conduction cylinder is arranged in the constant-temperature cylinder, an electric heating piece is arranged in the heat conduction cylinder, a sealed uniform heat cavity is formed between the heat conduction cylinder and the constant-temperature cylinder, the uniform heat cavity is filled with a heat conduction medium, the uniform heat cavity is preliminarily preheated in a low-temperature cavity, and a large amount of liquid in a liquid supplementing cavity, a heating gap and a high-temperature cavity is rapidly heated to a set temperature; the liquid finally flows to the spiral groove of the heat conduction cylinder for final temperature adjustment, the temperature is accurately adjusted to the set temperature, the fluid heating area is large, the device is suitable for the working condition that the fluid discharging speed is high, the fluid heating path is long, staged preheating is achieved, and heat energy is fully utilized.

Description

Technical Field

[0001] The present invention belongs to the technical field related to medical thermostatic equipment, and more specifically, particularly relates to a thermostatic infusion device for hysteroscopic surgery. Background Art

[0002] During hysteroscopic surgery, doctors and patients need to receive continuous infusion and maintain the temperature of the infusion fluid. Existing constant temperature infusion devices usually include a heating tank for accommodating the infusion tube, and a heating device is provided on the back of the heating tank for heating the infusion tube.

[0003] The prior art still has the following technical problems: The liquid flows out continuously, and needs to be heated continuously. In this process, the fluid is not heated uniformly enough, and the temperature of the flowing liquid fluctuates. In addition, the heating stability of the heating device is not enough, which will aggravate the unevenness of the liquid temperature. In addition, the existing equipment does not have any scheme that is conducive to liquid convection or mixing. At a certain stage of hysteroscopic surgery, the infusion flow rate needs to be increased. When the flow rate is increased, the use of the existing constant temperature device is likely to cause temperature instability.

[0004] Therefore, in view of this, the existing structure is studied and improved, and a constant temperature infusion device for hysteroscopic surgery is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] The present invention provides a constant temperature infusion device for hysteroscopic surgery, which is used to overcome the above-mentioned defects in the prior art.

[0006] The purpose and effect of the constant temperature infusion device for hysteroscopic surgery of the present invention are achieved by the following specific technical means: The present invention provides a constant temperature infusion device for hysteroscopic surgery, comprising a fixed card seat and two constant temperature components arranged on the fixed card seat and distributed on the left and right, the constant temperature component comprising a heat-insulating outer shell and a constant temperature cylinder arranged in the heat-insulating outer shell, the outer wall surface of the constant temperature cylinder being concave to form a spiral groove, a heat-conducting cylinder being arranged in the constant temperature cylinder, an electric heating element being arranged inside the heat-conducting cylinder, a sealed uniform heat cavity being formed between the heat-conducting cylinder and the constant temperature cylinder, the uniform heat cavity being filled with a heat-conducting medium, an outer bottle being further arranged in the heat-conducting cylinder, the electric heating element surrounding the outer bottle for heating, an inner bottle being arranged in the outer bottle, the top end of the inner bottle being retracted inwardly so as to form a high-temperature cavity between the outer bottle and the inner bottle, the bottom of the inner bottle being retracted inwardly and forming a fluid infusion cavity between the outer bottle, a heating gap being formed between the side walls of the inner bottle and the outer bottle, and a fluid infusion opening being provided at the bottom of the inner bottle The liquid infusion opening is connected with the liquid infusion chamber, the liquid infusion chamber, the heating gap and the high-temperature chamber are connected from bottom to top, a liquid outlet pipe is arranged on the upper wall of the outer bottle, the liquid outlet pipe is connected with the high-temperature chamber, the liquid outlet pipe is wound around the constant temperature cylinder and trapped in the spiral groove, the liquid outlet pipe extends downward in a spiral trajectory, a switch sleeve is also arranged on the upper wall of the outer bottle, the switch sleeve is connected with the low-temperature chamber of the inner bottle, an inflatable rod is arranged in the low-temperature chamber, the inflatable rod is covered with an elastic membrane, the constant temperature component also includes an inflatable component, the air outlet of the inflatable component is connected with the inflatable rod, the wall of the inflatable rod is provided with an inflatable hole for inflating the elastic membrane, the two inflatable components alternately inflate the two elastic membranes, and the liquid in the left and right low-temperature chambers is squeezed in an alternating manner to be discharged through the liquid outlet pipe.

[0007] According to a further technical solution, the switch sleeve comprises an outer tube and an inner sliding tube slidably arranged in the outer tube, an inflation hole is provided on the wall of the inner sliding tube, a return spring for driving the inner sliding tube to move downward is arranged between the top of the inner sliding tube and the inner wall of the outer tube, a connector is fixedly arranged at the bottom of the inner sliding tube, the connector is connected to the top of the elastic membrane, and the inner sliding tube slides up and down in the outer tube to open or close the inflation hole.

[0008] According to a further technical solution, a heat-conducting ring is fixedly arranged on the outer wall of the heat-conducting cylinder, and a plurality of the heat-conducting rings are arranged at intervals in the longitudinal direction. The heat-conducting medium in the heat-uniform cavity is water, industrial heat-conducting oil or organic heat-conducting gel.

[0009] A further technical solution is that the constant temperature cylinder has a cylindrical cavity running through the upper and lower parts, the heat conductive cylinder is in the cylindrical cavity, the upper and lower ends of the heat conductive cylinder both have protruding annular sealing bodies, an elastic sealing ring is provided on the annular sealing body, and the elastic sealing ring seals the uniform heat cavity.

[0010] A further technical solution is to provide an upper locking ring and a lower locking ring at the upper and lower ends of the constant temperature cylinder respectively, the upper locking ring and the lower locking ring have external threads, the inner walls of the upper and lower ends of the constant temperature cylinder have internal threads, the internal threads and the external threads are matched and connected, and the upper locking ring and the lower locking ring lock the heat conductive cylinder inside the constant temperature cylinder.

[0011] A further technical solution is that the heat-conducting cylinder has a cylindrical cavity, and an inner end cover is sealed at the lower opening of the cylindrical cavity. A threaded hole running through the inner end cover is arranged in the middle of the inner end cover. A threaded portion is arranged at the lower portion of the inflation rod, and the threaded portion is threadedly connected to the threaded hole of the inner end cover. The lower end of the inflation rod is also connected to an air supply pipe, and the inflation rod has a central cavity, and the air supply pipe is connected to the central cavity. A heating rod is arranged in the central cavity, and the air supply pipe is connected to the inflation assembly through a high-pressure air pipe. The high-pressure air pipe is also connected to an air release pipe, and the air release pipe is connected to the atmosphere. A solenoid valve is arranged in the air release pipe.

[0012] A further technical solution is that the upper ends of the switch sleeves on the left and right sides are connected to infusion tubes, the two infusion tubes extend upward and merge into a liquid inlet, the liquid inlet is connected to the medical liquid storage bottle through a pipeline, the liquid outlet pipes on the two constant temperature components first extend downward and merge into a liquid outlet, and a medical one-way valve is also arranged in the liquid outlet pipe to limit the backflow of liquid in the liquid outlet pipe.

[0013] A further technical solution is that the top inner wall of the heat-insulating shell protrudes downward to form a cover that blocks the opening on the upper side of the heat-conducting cylinder, an opening that passes through the upper and lower sides is opened at the center of the cover, a sealing ring is arranged in the opening, the liquid replenishing tube extends upward and passes through the sealing ring, a through groove is opened on the side of the cover, and a gap for accommodating the liquid outlet pipe is formed between the heat-insulating shell and the constant temperature cylinder, and the liquid outlet pipe passes through the through groove and is wrapped around the outer wall of the constant temperature cylinder in the gap.

[0014] According to a further technical solution, the fixed socket includes a connecting plate and a buckle arranged on the back of the connecting plate, a bracket is fixedly connected to the front of the connecting plate, two sides of the bracket are respectively fixedly connected to the constant temperature component, and a control panel is also arranged on the bracket.

[0015] According to a further technical solution, the control panel is electrically connected to the inflatable components, and the control panel is electrically connected to the electric heating element. The control panel also has an interactive screen to adjust the inflation speed of the two inflatable components and the temperature of the electric heating element.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In a constant temperature infusion device for hysteroscopic surgery of the present invention, two elastic membranes that are alternately inflated on the left and right are arranged, and an outer bottle and an inner bottle for containing liquid are arranged, wherein one elastic membrane is inflated and the other elastic membrane is deflated. When the elastic membrane is inflated, the liquid in the inner bottle is squeezed, and the liquid flows to the narrow heating gap between the outer bottle and the inner bottle. The electric heating element surrounding the outer bottle generates heat to quickly heat the liquid in the heating gap. The electric heating element generates high temperature, which radiates inwardly. The path of the liquid heating flow is from bottom to top, passing through the liquid infusion cavity, the heating gap and the high temperature cavity in sequence. The high temperature cavity and the liquid infusion cavity at the upper and lower ends have a larger thickness, and the heating gap has a smaller gap. At the same height, the heat is propagated radially, the temperature difference between the inside and outside of the heating gap is small, and the fluid temperature consistency is good.

[0017] In addition, the liquid heats up quickly when flowing through the heating gap, and the heated liquid converges upward in the high-temperature cavity. Since the volume inside the high-temperature cavity is large and the flow velocity is low, while the volume inside the heating gap is small and the flow velocity is high, the liquid in the high-flow velocity area enters the low-flow velocity area. Due to the difference in flow velocity between the high-speed zone fluid and the low-speed zone fluid, a mixing effect will occur when the two meet, and further heat exchange will occur between the fluids, thereby further improving the temperature consistency of the fluid in the high-temperature cavity. After the temperature stabilizes, the low-speed fluid finally flows out through the liquid outlet pipe.

[0018] The electric heating element also generates heat that radiates outward to increase the temperature of the heat-conducting tube. The heat-conducting tube transfers a large amount of heat to the heat-conducting medium in the uniform heat cavity through the heat-conducting ring. The heat-conducting medium distributes the heat evenly so that the outer wall of the constant temperature tube has a uniform temperature. The liquid outlet pipe extends downward in a spiral path to increase the contact area of ​​the constant temperature tube with the liquid outlet pipe and increase the heating path of the liquid outlet pipe. The outer wall of the constant temperature tube performs the final temperature adjustment on the liquid outlet pipe, which has a good effect of maintaining a constant temperature. It is preheated in the low-temperature cavity, and a large amount of liquid in the liquid replenishment cavity, the heating gap, and the high-temperature cavity is quickly heated to the set temperature. The liquid finally flows to the spiral groove of the heat-conducting tube for the final temperature adjustment, which is accurately adjusted to the set temperature. The fluid has a large heating area and is suitable for working conditions with a fast fluid discharge speed. The fluid heating path is long and preheating is performed in stages to make full use of thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the 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, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1It is a schematic diagram of the three-dimensional structure from top to bottom of the viewing angle of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure from bottom to top of the viewing angle of the present invention; Figure 3 is a front view of the present invention; Figure 4 is a top view of the present invention; Figure 5 is a schematic structural diagram of one of the thermostatic components 11 in the present invention; Figure 6 is an exploded view of the thermostatic assembly 11 of the present invention; Figure 7 It is a schematic diagram of the structure inside the thermostatic component 11 of the present invention; Figure 8 yes Figure 7 Schematic diagram of the three-dimensional structure from the bottom view; Fig. 9 yes Figure 7 Schematic diagram of the three-dimensional structure from the top perspective; Fig.10 This is a state diagram of the left and right elastic membranes 39 of the present invention being alternately inflated; Fig.11 It is a schematic diagram of the structure of the combination of the constant temperature cylinder 27 and the heat conducting cylinder 26 in the present invention; Fig.12 It is a schematic diagram of the internal structure of the outer bottle 22 of the present invention; Fig.13 It is an enlarged schematic diagram of the structure of the switch sleeve 37 in the present invention.

[0022] Description of reference numerals: 10 fixed card seat, 11 constant temperature component, 12 monitoring panel, 13 charging component, 14 control panel, 15 bracket, 16 liquid infusion tube, 17 buckle, 19 high pressure gas pipe, 20 cable, 21 insulation shell, 22 outer bottle, 23 inner bottle, 24 charging rod, 25 electric heating element, 26 heat transfer tube, 27 constant temperature tube, 28 inner end cover, 29 lower end cover, 30 upper locking ring, 31 lower locking ring, 32 spiral groove, 33 liquid outlet pipe, 3 4 air supply pipe, 35 heat conduction ring, 36 uniform heat cavity, 37 switch sleeve, 38 low temperature cavity, 39 elastic membrane, 40 air cavity, 41 central cavity, 42 elastic locking ring, 43 threaded portion, 44 liquid supply opening, 45 liquid supply cavity, 46 charging hole, 47 heating gap, 48 high temperature cavity, 49 upper ring body, 50 return spring, 52 connector, 53 inner sliding tube, 54 outer tube, 55 lower ring body, 56 liquid inlet nozzle, 57 annular sealing body. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See attached Figure 1-13The present invention provides a constant temperature infusion device for hysteroscopic surgery, comprising a fixed card seat 10 and two left and right distributed constant temperature components 11 arranged on the fixed card seat 10, the constant temperature component 11 comprises a heat-insulating shell 21 and a constant temperature cylinder 27 arranged in the heat-insulating shell 21, the outer wall surface of the constant temperature cylinder 27 is concave to form a spiral groove 32, a heat-conducting cylinder 26 is arranged in the constant temperature cylinder 27, an electric heating element 25 is arranged inside the heat-conducting cylinder 26, and a sealed uniform heat cavity is formed between the heat-conducting cylinder 26 and the constant temperature cylinder 27 36, the heat-uniform cavity 36 is filled with a heat-conducting medium, an outer bottle 22 is further arranged in the heat-conducting cylinder 26, the electric heating element 25 heats around the outer bottle 22, an inner bottle 23 is arranged in the outer bottle 22, the top of the inner bottle 23 is retracted inwardly so as to form a high-temperature cavity 48 between the outer bottle 22 and the inner bottle 23, the bottom of the inner bottle 23 is retracted inwardly and forms a liquid replenishing cavity 45 with the outer bottle 22, a heating gap 47 is formed between the inner bottle 23 and the side wall of the outer bottle 22, and a liquid replenishing opening is provided at the bottom of the inner bottle 23 44, the liquid replenishment opening 44 is connected to the liquid replenishment chamber 45, the liquid replenishment chamber 45, the heating gap 47 and the high temperature chamber 48 are connected from bottom to top, the upper wall of the outer bottle 22 is provided with a liquid outlet pipe 33, the liquid outlet pipe 33 is connected to the high temperature chamber 48, the liquid outlet pipe 33 is wound around the constant temperature cylinder 27 and trapped in the spiral groove 32, the liquid outlet pipe 33 extends downward in a spiral trajectory, the upper wall of the outer bottle 22 is also provided with a switch sleeve 37, the switch sleeve 37 is connected to the lower edge of the inner bottle 23 The temperature chamber 38 is connected, and an inflation rod 24 is arranged in the low-temperature chamber 38. The inflation rod 24 is covered with an elastic membrane 39. The constant temperature component 11 also includes an inflation component 13. The air outlet of the inflation component 13 is connected to the inflation rod 24. The wall of the inflation rod 24 is provided with an inflation hole 46 for inflating the elastic membrane 39. The two inflation components 13 inflate the two elastic membranes 39 alternately, and squeeze the liquid in the left and right low-temperature chambers 38 in an alternating manner to be discharged through the liquid outlet pipe 33.

[0027] In this embodiment, the lower end of the heat-insulating shell 21 is open, and a lower end cover 29 is fixedly arranged at the lower end of the heat-insulating shell 21. The lower end cover 29 has a through groove, and an inflatable component 13 is fixedly arranged under the lower end cover 29. The inflatable component 13 has a micro air pump inside, and a filter hole is opened in the wall of the inflatable component 13. The air inlet of the micro air pump is aligned with the filter hole, and the air outlet of the micro air pump is connected to the inflatable rod 24. The air cavity 40 is wrapped around the surface of the inflatable rod 24, and the lower side of the air cavity 40 has an opening. The lower opening of the air cavity 40 is sealed and tightly attached to the surface of the inflatable rod 24 by an elastic locking ring 42.

[0028] The inner bottle 23 has a low-temperature cavity 38, and the lower side of the inner bottle 23 has a liquid replenishment opening 44. In the present embodiment, the lower opening of the inner bottle 23 is retracted so that the lower opening of the heating gap 47 has a larger flow area, which facilitates the upward flow of cold water in the liquid replenishment cavity 45. A longitudinal distance is formed between the lower end of the inner bottle 23 and the bottom wall of the outer bottle 22 to increase the volume of the liquid replenishment cavity 45 to accommodate the fluid.

[0029] Preferably, the switch sleeve 37 includes an outer tube 54 and an inner sliding tube 53 slidably arranged in the outer tube 54, the wall of the inner sliding tube 53 is provided with an inflation hole 46, a return spring 50 is arranged between the top of the inner sliding tube 53 and the inner wall of the outer tube 54 to drive the inner sliding tube 53 to move downward, a connector 52 is fixedly arranged at the bottom of the inner sliding tube 53, the connector 52 is connected to the top of the elastic membrane 39, and the inner sliding tube 53 slides up and down in the outer tube 54 to open or close the inflation hole 46.

[0030] In this embodiment, a liquid inlet nozzle 56 is embedded in the upper opening of the outer tube 54, an upper ring body 49 is fixedly arranged in the liquid inlet nozzle 56, a lower ring body 55 is embedded in the upper opening of the inner sliding tube 53, the diameter of the lower ring body 55 is smaller than that of the inner sliding tube 53, the diameter of the upper ring body 49 is smaller than that of the liquid inlet nozzle 56, the upper end of the reset spring 50 is sleeved outside the upper ring body 49, and the lower end of the reset spring 50 is sleeved outside the lower ring body 55.

[0031] Preferably, a heat-conducting ring 35 is fixedly provided on the outer wall surface of the heat-conducting cylinder 26 , and a plurality of the heat-conducting rings 35 are arranged at intervals in the longitudinal direction. The heat-conducting medium in the heat-uniform cavity 36 is water, industrial heat-conducting oil or organic heat-conducting gel.

[0032] Preferably, the constant temperature cylinder 27 has a cylindrical cavity running through from top to bottom, the heat conductive cylinder 26 is in the cylindrical cavity, the upper and lower ends of the heat conductive cylinder 26 both have protruding annular sealing bodies 57, an elastic sealing ring is provided on the annular sealing body 57, and the elastic sealing ring seals the uniform heat cavity 36.

[0033] Preferably, an upper locking ring 30 and a lower locking ring 31 are respectively provided at the upper and lower ends of the constant temperature cylinder 27, and the upper locking ring 30 and the lower locking ring 31 have external threads, and the inner walls of the upper and lower ends of the constant temperature cylinder 27 have internal threads, and the internal threads and the external threads are matched and connected, and the upper locking ring 30 and the lower locking ring 31 lock the heat conductive cylinder 26 inside the constant temperature cylinder 27.

[0034] Preferably, the heat-conducting cylinder 26 has a cylindrical cavity, and an inner end cover 28 is sealed at the lower opening of the cylindrical cavity. A threaded hole running through the inner end cover 28 is provided in the middle, and a threaded portion 43 is provided at the lower portion of the inflation rod 24. The threaded portion 43 is threadedly connected to the threaded hole of the inner end cover 28. The lower end of the inflation rod 24 is also connected to an air supply pipe 34. The inflation rod 24 has a central cavity 41, and the air supply pipe 34 is connected to the central cavity 41. A heating rod is provided in the central cavity 41. The air supply pipe 34 is connected to the inflation component 13 through a high-pressure air pipe 19. The high-pressure air pipe 19 is also connected to an air release pipe, and the air release pipe is connected to the atmosphere. An electromagnetic valve is provided in the air release pipe.

[0035] Preferably, the upper ends of the switch sleeves 37 on the left and right sides are connected to infusion tubes 16, the two infusion tubes 16 extend upward and merge into a liquid inlet, the liquid inlet is connected to the medical liquid storage bottle through a pipeline, the liquid outlet pipes 33 on the two constant temperature components 11 first extend downward and merge into a liquid outlet, and a medical one-way valve is also arranged in the liquid outlet pipe 33 to limit the backflow of liquid in the liquid outlet pipe 33.

[0036] Preferably, the top inner wall of the heat-insulating outer shell 21 protrudes downward to form a cover that blocks the upper opening of the heat-conducting tube 26, and an opening that passes through the upper and lower parts is opened at the center of the cover. A sealing ring is arranged in the opening, and the liquid replenishing tube 16 extends upward and passes through the sealing ring. A through groove is opened on the side of the cover, and a gap for accommodating the liquid outlet pipe 33 is formed between the heat-insulating outer shell 21 and the constant temperature tube 27. The liquid outlet pipe 33 passes through the through groove and is wound around the outer wall of the constant temperature tube 27 in the gap.

[0037] Preferably, the fixed base 10 includes a connecting plate and a buckle 17 arranged on the back of the connecting plate, and a bracket 15 is fixedly connected to the front of the connecting plate. Both sides of the bracket 15 are respectively fixedly connected to the constant temperature component 11, and a control panel 14 is also arranged on the bracket 15.

[0038] Preferably, the control panel 14 is electrically connected to the inflatable component 13 , and the control panel 14 is electrically connected to the electric heating element 25 , and the control panel 14 also has an interactive screen to adjust the inflation speed of the two inflatable components 13 and adjust the temperature of the electric heating element 25 .

[0039] During specific implementation, a monitoring panel 12 is further provided on the side wall of the thermostatic component 11 , and an air pressure detection device is further provided inside the elastic membrane 39 . The monitoring panel 12 is electrically connected to the air pressure detection device, and is used to monitor the air pressure value inside the elastic membrane 39 .

[0040] The device also includes an electric control module and a cable 20. The electric control module is electrically connected to the electric heating element 25. The cable 20 is connected to the power supply. The electric control module is also electrically connected to the constant temperature component 11. The constant temperature component 11 sends a signal to the electric control module, and the power supply supplies power to the electric control module through the cable 20.

[0041] The working steps of this device: First, the micro air pump in the left inflation component 13 is started, and the gas is pumped into the inflation rod 24 on the left through the high-pressure air pipe 19. The gas enters the air cavity 40 through the inflation hole 46, and the elastic membrane 39 expands itself. The volume of the low-temperature cavity 38 decreases, and the liquid in the low-temperature cavity 38 is squeezed out. The squeezed liquid flows downward into the liquid infusion cavity 45 through the liquid infusion opening 44. The liquid flows upward through the heating gap 47 and the high-temperature cavity 48 and flows out through the liquid outlet pipe 33. In this process, the expansion action of the elastic membrane 39 is coordinated to pressurize the liquid, which can increase the liquid outflow speed to meet the requirement of fast liquid speed during hysteroscopic dilation.

[0042] Since the electric heating element 25 surrounds the outer bottle 22, the heat is diffused from the outside to the inside, so the liquid in the low temperature chamber 38 will be preheated first and then heated to the set temperature value, which makes it easier to increase the temperature.

[0043] The electric heating element 25 is energized to generate high temperature, which radiates inward. The path of the liquid temperature rise is from bottom to top, passing through the liquid replenishment chamber 45, the heating gap 47, and the high-temperature chamber 48 in sequence. The high-temperature chamber 48 and the liquid replenishment chamber 45 at the upper and lower ends are thicker, and the gap of the heating gap 47 is smaller. At the same height, the heat propagates radially, the temperature difference between the inside and outside of the heating gap 47 is small, and the temperature consistency of the fluid is good. In addition, the fluid heats up quickly when flowing through the heating gap 47, and the heated liquid converges upward in the high-temperature chamber 48. Since the volume inside the high-temperature chamber 48 is large and the flow rate is low, and the volume inside the heating gap 47 is small and the flow rate is high, the high flow rate enters the low flow rate interval, and further heat exchange occurs between the fluids, thereby further improving the temperature consistency of the fluid in the high-temperature chamber 48. The low-speed fluid after the temperature stabilizes finally flows out through the liquid outlet pipe 33.

[0044] The heat generated by the electric heating element 25 radiates outward to increase the temperature of the heat-conducting tube 26. The heat-conducting tube 26 transfers a large amount of heat to the heat-conducting medium in the uniform heat chamber 36 through the heat-conducting ring 35. The heat-conducting medium distributes the heat evenly so that the outer wall of the constant temperature tube 27 has a uniform temperature. The liquid outlet pipe 33 extends downward in a spiral path, and the outer wall of the constant temperature tube 27 performs the final temperature adjustment on the liquid outlet pipe 33.

[0045] Second, when the elastic membrane 39 on the left side collides to the limit, the micro air pump on the left side stops working and the solenoid valve on the left side is opened, the gas in the elastic membrane 39 leaks out through the high-pressure air pipe 19, the elastic membrane 39 slowly contracts, and drives the connector 52 and the inner sliding tube 53 to move downward until the inflation hole 46 moves downward and is exposed. At this time, the inflation hole 46 is connected to the low-temperature chamber 38 and the liquid replenishing tube 16, and the liquid is replenished into the low-temperature chamber 38 through the liquid replenishing tube 16.

[0046] Third, when the micro air pump on the left is started, the micro air pump on the right is turned off, and the solenoid valve on the right is opened, so that the gas in the elastic membrane 39 is leaked outward through the high-pressure air pipe 19, and the liquid is replenished into the low-temperature chamber 38 through the liquid replenishing pipe 16; When the micro air pump on the left is turned off, the micro air pump on the right is turned on and drives the liquid on the right to be discharged through the liquid outlet pipe 33.

[0047] At a certain moment, there is always one micro air pump working, and the left and right liquid outlet pipes 33 discharge water alternately to ensure a continuous and stable output of water.

[0048] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A constant temperature infusion device for hysteroscopic surgery, characterized in that: The invention comprises a fixed card seat and two thermostatic components distributed on the fixed card seat, the thermostatic component comprises a heat-insulating outer shell and a thermostatic cylinder arranged in the heat-insulating outer shell, the outer wall surface of the thermostatic cylinder is concave to form a spiral groove, a heat-conducting cylinder is arranged in the thermostatic cylinder, an electric heating element is arranged inside the heat-conducting cylinder, a sealed uniform heat cavity is formed between the heat-conducting cylinder and the thermostatic cylinder, the uniform heat cavity is filled with a heat-conducting medium, an outer bottle is also arranged in the heat-conducting cylinder, the electric heating element heats around the outer bottle, an inner bottle is arranged in the outer bottle, the top end of the inner bottle is retracted to form a high-temperature cavity between the outer bottle and the inner bottle, the bottom of the inner bottle is retracted to form a liquid replenishment cavity between the outer bottle, a heating gap is formed between the side walls of the inner bottle and the outer bottle, a liquid replenishment opening is provided at the bottom of the inner bottle, and the liquid replenishment opening is connected to the inner bottle. The liquid infusion chamber is connected, and the liquid infusion chamber, the heating gap and the high-temperature chamber are connected from bottom to top. A liquid outlet pipe is arranged on the upper wall of the outer bottle, and the liquid outlet pipe is connected with the high-temperature chamber. The liquid outlet pipe is wound around the constant temperature cylinder and trapped in the spiral groove. The liquid outlet pipe extends downward in a spiral trajectory. A switch sleeve is also arranged on the upper wall of the outer bottle, and the switch sleeve is connected with the low-temperature chamber of the inner bottle. An inflatable rod is arranged in the low-temperature chamber, and the inflatable rod is covered with an elastic membrane. The constant temperature component also includes an inflatable component, and the air outlet of the inflatable component is connected with the inflatable rod. The wall of the inflatable rod is provided with an inflatable hole for inflating the elastic membrane. The two inflatable components inflate the two elastic membranes alternately, and squeeze the liquid in the left and right low-temperature chambers in an alternating manner to be discharged through the liquid outlet pipe.

2. A constant temperature infusion device for hysteroscopic surgery according to claim 1, characterized in that: The switch sleeve includes an outer tube and an inner sliding tube slidably arranged in the outer tube, the wall of the inner sliding tube is provided with an inflation hole, a return spring for driving the inner sliding tube to move downward is arranged between the top of the inner sliding tube and the inner wall of the outer tube, a connector is fixedly arranged at the bottom of the inner sliding tube, the connector is connected to the top of the elastic membrane, and the inner sliding tube slides up and down in the outer tube to open or close the inflation hole.

3. A constant temperature infusion device for hysteroscopic surgery according to claim 1, characterized in that: A heat-conducting ring is fixedly arranged on the outer wall of the heat-conducting cylinder, and a plurality of the heat-conducting rings are arranged at intervals in the longitudinal direction. The heat-conducting medium in the heat-uniform cavity is water, industrial heat-conducting oil or organic heat-conducting gel.

4. A constant temperature infusion device for hysteroscopic surgery according to claim 1, characterized in that: The constant temperature cylinder has a cylindrical cavity running through from top to bottom, the heat-conducting cylinder is in the cylindrical cavity, the upper and lower ends of the heat-conducting cylinder both have protruding annular sealing bodies, an elastic sealing ring is arranged on the annular sealing body, and the elastic sealing ring seals the uniform heat cavity.

5. A constant temperature infusion device for hysteroscopic surgery according to claim 1, characterized in that: An upper locking ring and a lower locking ring are respectively arranged at the upper and lower ends of the constant temperature cylinder, the upper locking ring and the lower locking ring are provided with external threads, the inner walls at the upper and lower ends of the constant temperature cylinder are provided with internal threads, the internal threads and the external threads are matched and connected, and the upper locking ring and the lower locking ring lock the heat conducting cylinder inside the constant temperature cylinder.

6. A constant temperature infusion device for hysteroscopic surgery according to claim 1, characterized in that: The heat-conducting cylinder has a cylindrical cavity, and an inner end cover is sealed at the lower opening of the cylindrical cavity. A threaded hole running through the inner end cover is arranged in the middle, and a threaded portion is arranged at the lower portion of the inflation rod. The threaded portion is threadedly connected to the threaded hole of the inner end cover. The lower end of the inflation rod is also connected to an air supply pipe, and the inflation rod has a central cavity, and the air supply pipe is connected to the central cavity. A heating rod is arranged in the central cavity, and the air supply pipe is connected to the inflation assembly through a high-pressure air pipe. The high-pressure air pipe is also connected to an air release pipe, and the air release pipe is connected to the atmosphere. An electromagnetic valve is arranged in the air release pipe.

7. A constant temperature infusion device for hysteroscopic surgery according to claim 1, characterized in that: The upper ends of the switch sleeves on the left and right sides are connected to infusion tubes, the two infusion tubes extend upward and merge into a liquid inlet, the liquid inlet is connected to the medical liquid storage bottle through a pipeline, the liquid outlet pipes on the two constant temperature components first extend downward and merge into a liquid outlet, and a medical one-way valve is also arranged in the liquid outlet pipe to limit the backflow of liquid in the liquid outlet pipe.

8. A constant temperature infusion device for hysteroscopic surgery according to claim 7, characterized in that: The top inner wall of the heat-insulating shell protrudes downward to form a cover that blocks the upper opening of the heat-conducting cylinder. An opening that passes through the upper and lower sides is formed at the center of the cover. A sealing ring is arranged in the opening. The liquid replenishing tube extends upward and passes through the sealing ring. A through groove is formed on the side of the cover. A gap for accommodating the liquid outlet pipe is formed between the heat-insulating shell and the constant temperature cylinder. The liquid outlet pipe passes through the through groove and is wound around the outer wall of the constant temperature cylinder in the gap.

9. A constant temperature infusion device for hysteroscopic surgery according to claim 1, characterized in that: The fixed card seat includes a connecting plate and a buckle arranged on the back of the connecting plate. The front of the connecting plate is fixedly connected with a bracket. Both sides of the bracket are respectively fixedly connected to the constant temperature component. A control panel is also arranged on the bracket.

10. A constant temperature infusion device for hysteroscopic surgery according to claim 9, characterized in that: The control panel is electrically connected to the inflatable components, and the control panel is electrically connected to the electric heating element. The control panel also has an interactive screen to adjust the inflation speed of the two inflatable components and adjust the temperature of the electric heating element.

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