Hot fill device

Abstract

This invention discloses a hyperthermic perfusion device, relating to the field of medical devices. It provides a hyperthermic perfusion device with a simpler tubing system, facilitating shorter preparation time for hyperthermic perfusion chemotherapy. The hyperthermic perfusion device includes a main unit and a liquid circulator; the liquid circulator includes a rigid liquid container, a suction tube, a return container, an output tube, a return tube, and two dispensing pumps; the dispensing pumps are vertically positioned at the upper end of the rigid liquid container, and include an inlet check valve, a drain check valve, a collar, and a liquid aspirator with a piston rod. The inlet and drain check valves communicate with the internal space of the liquid aspirator, and the collar is connected to the piston rod; the suction tube is connected to both inlet check valves and extends to the lower part of the rigid liquid container; the return container is located at the upper end of the rigid liquid container and has a filter screen; the output tube is connected to the rigid liquid container and connected to the two drain check valves via tubing; the return tube is connected to the return container; the main unit can heat the rigid liquid container and drive the dispensing pumps.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a hot perfusion device. Background Technology

[0002] Hyperthermic perfusion is a novel cancer treatment method combining hyperthermia and chemotherapy. Specifically, a catheter is inserted into the body via puncture or minimally invasive surgery. The hyperthermic perfusion device heats the therapeutic medication and then delivers it into the body through the catheter. The medication effectively kills tumor cells as it circulates within the body. The medication then returns to the hyperthermic perfusion device via another catheter, thus circulating the medication. The hyperthermic perfusion device effectively heats and circulates the medication.

[0003] Existing hot water injection systems consist of a main unit and hot water injection piping (liquid circulator). The main unit's main components include... Figure 1 The heater at point a, the heating circulation pump at point b, and the output pump at point c are all pumps that generate suction by squeezing and releasing the pipeline. The main components of the hot water injection pipeline include... Figure 1 The liquid bag is located at point d, the heating pipe at point e, the output pipe at point f, and the return pipe at point g. The liquid bag is hung on the main unit, and the medicine is put into the liquid bag through the infusion bag that is hung high.

[0004] The method of heating the medicinal solution is as follows: A heating pipe is wound around a heating circulation pump, and the heating pipe has a U-shaped rigid tube inserted into a heater. The medicinal solution in the liquid bag circulates between the heating pipe and the liquid bag under the action of the heating circulation pump. The heater heats the medicinal solution passing through the U-shaped rigid tube, thereby maintaining a suitable temperature for the medicinal solution in the liquid bag. In addition, a temperature measuring device is installed to measure the temperature of the medicinal solution entering the human body, and this measurement value is used to further control the heating temperature of the heater.

[0005] The medication is delivered to the body as follows: the output tube is wrapped around the output pump and connected to the catheter inserted into the body. The medication in the liquid bag flows into the body through the output tube under the action of the output pump. The medication is returned to the body as follows: the return tube is connected to the catheter inserted into the body, and the medication flows back into the liquid bag through the return tube.

[0006] Existing hyperthermic perfusion devices have numerous and long liquid tubing lines that are prone to tangling and becoming chaotic. These tubing lines need to be wound around the heating circulation pump and output pump, making the pre-installation preparation and installation process cumbersome. This results in prolonged preparation time for hyperthermic perfusion chemotherapy, impacting nursing efficiency. Furthermore, sloughed tissue and blood clots can block the return tubing, hindering drug circulation. Currently, this can only be cleared manually, for example, by connecting a syringe to the return tubing and flushing with saline solution via injection and aspiration, which is time-consuming and labor-intensive. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a hyperthermic perfusion device with a simpler pipeline that is conducive to shortening the preparation time for hyperthermic perfusion chemotherapy.

[0008] The technical solution adopted to solve the above problems is as follows: The hot water injection device includes a main unit and a liquid circulator; the main unit includes a main unit housing, a heater, a circulator fixing structure, a controller, and two liquid dispensing actuators; the front side of the main unit housing has a through hole; the heater is installed on the main unit housing and corresponds to the position of the through hole, the heater can move back and forth, and the heater has a circulator placement cavity; the liquid dispensing actuator is installed inside the main unit housing and located above the heater, and the liquid dispensing actuator includes a rod that can move up and down; the circulator fixing structure and the controller are installed inside the main unit housing, and the controller can control the liquid dispensing actuator;

[0009] The liquid circulator includes a rigid liquid box, a suction tube, a reflux box, an output tube, a return tube, and two dispensing pumps. The dispensing pumps are vertically positioned at the top of the rigid liquid box and include an inlet check valve, a outlet check valve, a collar, and a liquid suction device with a piston rod. The inlet and outlet check valves communicate with the internal space of the liquid suction device, and the collar is connected to the piston rod. The suction tube is connected to both inlet check valves and extends to the lower part of the rigid liquid box. The reflux box is located at the top of the rigid liquid box and has a filter screen. The output tube is connected to the rigid liquid box and, through a pipeline, to the two outlet check valves. The reflux tube is connected to the reflux box.

[0010] The lower part of the liquid circulator is placed into the circulator placement cavity, and two insert rods are inserted into two collars respectively. The circulator fixing structure fixes the rigid liquid box.

[0011] Furthermore: the return box includes a return box body and an air intake connector. The filter screen is horizontally installed inside the return box body. The lower end of the return box is a drain pipe, which is equipped with a drain control valve. The operating rod of the drain control valve extends forward to pass through the rigid liquid box. The operating rod is sealed to the rigid liquid box. A knob is connected to the front end of the operating rod. The air intake connector is connected to the return box body. The liquid circulator includes a horizontal connecting pipe, which connects the output pipe and the return pipe. A pipe clamp is installed on the output pipe, and the pipe clamp is located in front of the connection point between the horizontal connecting pipe and the return pipe.

[0012] The main unit includes a pipe control structure, which includes a pipe control block, a control block cover, a suction device, and two clamps. The pipe control block has vertical and horizontal pipe grooves, and the control block cover is placed on the pipe control block. The two clamps are respectively set to correspond to the vertical and horizontal pipe grooves. The suction device is connected to the pipe control block. The controller can control the clamps and the suction device.

[0013] The return pipe is placed in the vertical tube groove, the horizontal connecting pipe is placed in the horizontal tube groove, and the suction device is connected to the suction connector through the pipe.

[0014] Furthermore, the heater includes a water tank, a flexible heat-conducting pad, and an electric heater. The circulator placement chamber is located on the water tank. The water tank sections located below, behind, and on the left and right sides of the circulator placement chamber can all hold water. Flexible heat-conducting pads are connected to the lower, rear, and left and right walls of the circulator placement chamber. The water tank section located in front of the circulator placement chamber is a transparent plate. The electric heater can heat the internal space of the water tank.

[0015] Furthermore: the main unit includes a first guide structure; the heater is placed on the main unit housing; the first guide structure is arranged in the front-to-back direction inside the main unit housing and located behind the heater; the first guide structure includes a first guide sleeve and a first guide rod; the first guide sleeve is connected to the main unit housing; the first guide rod is inserted into the first guide sleeve and cooperates with the first guide sleeve; the heater is connected to the first guide rod.

[0016] Furthermore, there are two circulator fixing structures, each consisting of a fixing seat, a pressing screw, and a flexible pressure pad. The fixing seat is connected to the main housing, the pressing screw is threaded to the fixing seat, and the flexible pressure pad is connected to the pressing screw. The two circulator fixing structures press down on the left and right sides of the rigid liquid box respectively.

[0017] Furthermore, the liquid dispensing actuator includes a first electrically operated telescopic rod, and the insertion rod is connected to the first electrically operated telescopic rod.

[0018] Furthermore, the pipe control block has two clamping head holes, which are respectively set to correspond to the vertical pipe groove and the horizontal pipe groove; the clamping device includes a second electric telescopic rod and an elastic clamp; the second electric telescopic rod is connected to the pipe control block, and the elastic clamp is connected to the second electric telescopic rod, and the elastic clamp can extend out from the clamping block head.

[0019] Furthermore, the hot water injection device includes a second guide structure; the second guide structure is arranged in the front-to-back direction inside the main housing and located behind the pipe control structure. The second guide structure includes a second guide sleeve and a second guide rod. The second guide sleeve is connected to the main housing, the second guide rod is inserted into the second guide sleeve and cooperates with the second guide sleeve, and the pipe control structure is connected to the second guide rod.

[0020] Furthermore, the main unit includes a cover plate, which is connected to the main unit and can cover the through hole.

[0021] The beneficial effects of this invention are: 1. When using this invention, the heater is removed, and the rigid liquid box is inserted into the circulator placement cavity until it is fully inserted. Then, the heater is pushed inward, causing the rigid liquid box to move inward together, so that the collar is fitted onto the insertion rod. Then, the rigid liquid box is fixed with the circulator fixing structure. Then, the output tube and return tube are connected to the catheter inserted into the human body, thus completing the preparation work for the connection before hyperthermic perfusion chemotherapy.

[0022] The liquid circulator has a simple piping system, eliminating the need for heating pipes compared to existing technologies; the output pipe does not need to be wrapped around the output pump, thus significantly reducing its length.

[0023] The fluid circulator of this invention features tubing that is less prone to tangling and tangling, making tubing management easier. It also eliminates the need for winding tubing around the heating circulation pump and output pump, as well as the work of inserting the heating tubing into the heater during connection preparation. This significantly simplifies the connection preparation work before hyperthermic chemotherapy, shortens the preparation time for hyperthermic perfusion chemotherapy, reduces the workload of nurses, and facilitates more efficient hyperthermic perfusion chemotherapy.

[0024] 2. With further optimization of the design, the present invention can automatically clear the tube when it is blocked, eliminating the need for manual clearing, which also reduces the workload of nurses and improves the automation level of hyperthermic perfusion chemotherapy. Attached Figure Description

[0025] Figure 1 This is a structural diagram of an existing hot water infusion device;

[0026] Figure 2 This is a front view of the hot infusion device of the present invention;

[0027] Figure 3 This is a cross-sectional view of the hot infusion device of the present invention;

[0028] Figure 4 This is a top view of the hot infusion device of the present invention;

[0029] Figure 5 This is a host structure diagram;

[0030] Figure 6 This is the front view of the heater;

[0031] Figure 7 This is a top view of the heater;

[0032] Figure 8 This is the front view of the liquid dispensing driver;

[0033] Figure 9 This is the right view of the liquid dispensing driver;

[0034] Figure 10 It is a fixed structure for the circulator;

[0035] Figure 11 This is the main view of the pipe control structure;

[0036] Figure 12 This is the right view of the pipe control structure;

[0037] Figure 13 This is a structural diagram of a liquid circulator;

[0038] Figure 14This is a top view of a liquid circulator;

[0039] Figure 15 This is a structural diagram of a liquid mixing pump;

[0040] Figure 16 This is a structural diagram of the reflux box;

[0041] The components in the diagram are labeled as follows: Main unit 1, Main unit housing 11, Through hole 111, Heater 12, Water tank 121, Circulator placement cavity 122, Flexible heat-conducting pad 123, Electric heater 124, Transparent plate 125, Liquid dispensing actuator 13, First electric telescopic rod 131, Insert rod 132, Circulator fixing structure 14, Fixing base 141, Pressing screw 142, Flexible pressure pad 143, Pipe control structure 15, Pipe control block 151, Vertical pipe groove 1511, Horizontal pipe groove 1512, Clamping head hole 1513, Control block cover 152, Suction device 153, Clamping device 154, Second electric telescopic rod 1541, Elastic clamp 1542, First guide structure 16, First guide sleeve 1 61. First guide rod 162. Second guide structure 17. Second guide sleeve 172. Second guide rod 173. Controller 18. Cover plate 19. Liquid circulator 2. Rigid liquid box 21. Liquid dispensing pump 22. Liquid suction device 221. Suction device cylinder 2211. Piston 2212. Piston rod 2213. Rear cover 2214. Inlet check valve 222. Drain check valve 223. Collar 224. Output pipe 23. Pipe clamp 231. Return pipe 24. Suction pipe 25. Return box 26. Return box body 261. Drain pipe 2611. Filter screen 262. Suction connector 263. Drain control valve 264. Operating lever 2641. Knob 265. Horizontal connecting pipe 27. Liquid bag 3. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 2 to 16 As shown, the hot water infusion device includes a main unit 1 and a liquid circulator 2; the main unit 1 includes a main unit housing 11, a heater 12, a circulator fixing structure 14, a controller 18, and two liquid dispensing actuators 13; the front side of the main unit housing 11 has a through hole 111; the heater 12 is disposed on the main unit housing 11 and corresponds to the position of the through hole 111, the heater 12 can move back and forth, and the heater 12 has a circulator placement cavity 122; the liquid dispensing actuators 13 are disposed inside the main unit housing 11 and located above the heater 12, and the liquid dispensing actuators 13 include a rod 132 that can move up and down; the circulator fixing structure 14 and the controller 18 are disposed inside the main unit housing 11, and the controller 18 can control the liquid dispensing actuators 13;

[0044] The liquid circulator 2 includes a rigid liquid container 21, a suction pipe 25, a return container 26, an output pipe 23, a return pipe 24, and two liquid dispensing pumps 22. The liquid dispensing pumps 22 are vertically arranged at the upper end of the rigid liquid container 21. Each liquid dispensing pump 22 includes an inlet check valve 222, a drain check valve 223, a collar 224, and a liquid suction device 221 with a piston rod 2213. The inlet check valve 222 and the drain check valve 223 are connected to the liquid suction device. The internal space of 221 is open, and the collar 224 is connected to the piston rod 2213; the suction tube 25 is connected to both inlet check valves 222 and extends to the lower part of the rigid liquid box 21; the return box 26 is located at the upper end of the rigid liquid box 21, and the return box 26 has a filter screen 262; the output tube 23 is connected to the rigid liquid box 21 and is connected to the two drain check valves 223 through a pipeline; the return tube 24 is connected to the return box 26.

[0045] The lower part of the liquid circulator 2 is inserted into the circulator placement cavity 122, and two insert rods 132 are respectively inserted into two collars 224. The circulator fixing structure 14 fixes the rigid liquid box 21.

[0046] In addition to the aforementioned connection structure, the hyperthermic perfusion device should also have some structures similar to those in existing technologies. For example, it should include a display screen to show parameters such as the flow rate and temperature of the chemotherapy solution. It should also include a temperature measuring structure connected to the front of the output tube to measure the temperature of the infused chemotherapy solution and control the heater based on this temperature feedback.

[0047] The liquid aspirator 221 has a structure basically the same as a syringe, including an aspirator barrel 2211, a piston 2212, and a piston rod 2213. The piston 2212 moves up and down to draw in and expel the liquid. A rear cover 2214 should be provided to seal the upper end of the aspirator barrel 2211 to prevent contaminants from entering the aspirator barrel 2211. The rear cover 2214 should have a vent to prevent air pressure from affecting the movement of the piston 2212. A filter can be used to cover the vent to further prevent external contaminants from entering through the vent. The rigid liquid container 21 should be transparent.

[0048] In use, the heater 12 is pulled forward, and the rigid liquid container 21 is inserted into the circulator placement cavity 122 until it is fully inserted. Then, the heater 12 is pushed inward, causing the rigid liquid container 21 to move inward together, so that the collar 224 is fitted onto the insertion rod 132. Then, the rigid liquid container 21 is fixed with the circulator fixing structure 14. Then, the output tube 23 and the return tube 24 are connected to the catheter inserted into the human body, thus completing the preparation of the catheter before hyperthermic perfusion chemotherapy. Medication needs to be added to the rigid liquid container 21. Existing methods can be used, such as using a suspended liquid bag 3 to infuse the medication into the rigid liquid container 21; other methods that ensure sterile medication infusion can also be used.

[0049] After the aforementioned preparatory work for the connection is completed, the heater 12 is started for a period of time. The heater 12 heats the lower part of the rigid liquid box 21, thus heating the internal drug solution. Once the drug solution is heated, the dispensing actuator 13 is activated. The insert rods 132 of the two dispensing actuators 13 move up and down, with one insert rod 132 moving upward while the other moves downward. The upward movement of the insert rod 132 drives the piston rod 2213 upward, opening the inlet check valve 222 and simultaneously closing the outlet check valve 223. The drug solution is then drawn into the liquid aspirator 221 through the suction tube 25. The downward movement of the insert rod 132 drives the piston rod 2213 downward, closing the inlet check valve 222 and simultaneously opening the outlet check valve 223. The drug solution is pushed into the output tube 23 and then injected into the patient. This achieves drug delivery. The two dispensing pumps 22 alternately output the drug solution, ensuring uninterrupted output and allowing the hyperthermic perfusion chemotherapy to proceed normally. The controller 18 controls the movement speed of the liquid dispensing driver 13, thereby controlling the hot perfusion speed.

[0050] After the medicine flows through the human body, it flows back to the return tube 24. The filter screen 262 filters the returned medicine, filtering out impurities such as human tissue and coagulated blood. The medicine then leaks down from the filter screen 262 back to the lower part of the rigid liquid box 21.

[0051] To achieve automatic unblocking when the return pipe 24 is blocked, the present invention is preferably further improved as follows: The return box 26 includes a return box body 261 and an air intake connector 263. The filter screen 262 is horizontally arranged inside the return box body 261. The lower end of the return box 26 is a drain pipe 2611. A drain control valve 264 is provided on the drain pipe 2611. The operating rod 2641 of the drain control valve 264 extends forward to pass through the rigid liquid box 21. The operating rod 2641 is sealed with the rigid liquid box 21. A knob 265 is connected to the front end of the operating rod 2641. The air intake connector 263 is connected to the return box body 261. The liquid circulator 2 includes a transverse connecting pipe 27, which connects the output pipe 23 and the return pipe 24. A pipe clamp 231 is provided on the output pipe 23. The pipe clamp 231 is located in front of the connection point between the transverse connecting pipe 27 and the return pipe 24.

[0052] The main unit 1 includes a pipe control structure 15, which includes a pipe control block 151, a control block cover 152, a suction device 153, and two clamps 154. The pipe control block 151 has a vertical pipe groove 1511 and a horizontal pipe groove 1512, and the control block cover 152 covers the pipe control block 151. The two clamps 154 are respectively arranged corresponding to the vertical pipe groove 1511 and the horizontal pipe groove 1512. The suction device 153 is connected to the pipe control block 151. The controller 18 can control the clamps 154 and the suction device 153.

[0053] The return pipe 24 is placed into the vertical pipe groove 1511, the horizontal connecting pipe 27 is placed into the horizontal pipe groove 1512, and the suction device 153 is connected to the suction connector 263 through the pipe.

[0054] The automatic tube-clearing mechanism operates as follows: First, rotate the knob to close the drain control valve 264, thus sealing the return box 26. Then, clamp the output pipe 23 with the clamp 231 to pause hot infusion. Next, start the controller 18, which continues to control the dispensing driver 13 to drive the dispensing pump 22, and controls the clamp 154 ​​to clamp the return pipe 24 placed in the vertical tube trough 1511, while leaving the horizontal connecting pipe 27 in the horizontal tube trough 1512 unclamped. The medication output by the dispensing pump 22 no longer passes through the output pipe 23, but instead enters the return pipe 24 through the horizontal connecting pipe 27, flushing out any blockages. Then, the dispensing driver 13 stops operating, and the clamp 154 ​​clamps the horizontal connecting pipe 27 in the horizontal tube trough 1512, while leaving the return pipe 24 in the vertical tube trough 1511 unclamped. The suction device 153 starts, evacuating the return box 26, which in turn suctions the return pipe 24. The process of introducing and aspirating the solution into the return pipe 24 is repeated, using the same method as manual pipe clearing. Once the return pipe 24 is cleared, the pipe clamp 231 and the drain control valve 264 can be opened to resume hot infusion.

[0055] The method for placing the return pipe 24 into the vertical pipe groove 1511 and the horizontal connecting pipe 27 into the horizontal pipe groove 1512 is as follows: Open the control block cover 152, place the return pipe 24 and the horizontal connecting pipe 27 in, and then close the control block cover 152 to cover the return pipe 24 and the horizontal connecting pipe 27. The connection between the control block cover 152 and the through pipe control block 151 should be reliable to prevent the control block cover 152 from being pushed open when the return pipe 24 and the horizontal connecting pipe 27 are under pressure.

[0056] It should be noted that after the above settings are made, the transverse connecting pipe 27 should be closed during normal hot water injection. It can be manually closed by installing a pipe clamp 231 on the transverse connecting pipe 27, or it can be closed by relying on the clamping device 154. The pipe clamp 231 can be a conventional pipe clamp.

[0057] The specific structures of the components added or improved by the present invention compared to the prior art are described in detail below.

[0058] The specific structure of heater 12 can be as follows: Figure 6 and Figure 7As shown: The device includes a water tank 121, a flexible heat-conducting pad 123, and an electric heater 124. A circulator placement cavity 122 is mounted on the water tank 121. The water tank 121 sections located below, behind, and on the left and right sides of the circulator placement cavity 122 can hold water. Flexible heat-conducting pads 123 are connected to the lower, rear, and left and right walls of the circulator placement cavity 122. The water tank 121 section located in front of the circulator placement cavity 122 is a transparent plate 125. The electric heater 124 can heat the internal space of the water tank 121. The water tank 121 should also have a water inlet and a water outlet.

[0059] Water is added to the water tank 121, and the electric heater 124 heats the water. The heated water transfers heat to the flexible heat-conducting pad 123, and then to the rigid liquid container 21, thus heating the medicinal liquid. Hot infusion requires the medicinal liquid to be ingested at a temperature of 43°C. Considering heat loss in the pipeline, the temperature of the medicinal liquid inside the rigid liquid container 21 is higher than 43°C, but not very high. The above heating method is suitable for this operating condition and provides uniform heating. The transparent plate 125 facilitates observation of the medicinal liquid inside the rigid liquid container 21. The heat-conducting pad 123 should be in close contact with the rigid liquid container 21.

[0060] The heater 12 needs to move back and forth. The through hole on the main housing 11 allows the heater 12 and the liquid circulator 2 to pass through. Moving forward exposes the circulator placement cavity 122 from the main housing 11, making it easier to insert the rigid liquid box 21. After the rigid liquid box 21 is inserted, the heater 12 is moved inward, so that part of the rigid liquid box 21 is located inside the main housing 11, allowing the collar 224 to be fitted onto the insertion rod 132.

[0061] The heater 12 cannot shift left or right, otherwise it will affect the fit of the collar 224 onto the insert rod 132. To achieve this, the main unit 1 preferably includes a first guide structure 16; the heater 12 is placed on the main unit housing 11; the first guide structure 16 is arranged in the front-to-back direction within the main unit housing 11 and located behind the heater 12. The first guide structure 16 includes a first guide sleeve 161 and a first guide rod 162. The first guide sleeve 161 is connected to the main unit housing 11, and the first guide rod 162 is inserted into and cooperates with the first guide sleeve 161. The heater 12 is connected to the first guide rod 162. The first guide structure 16 ensures that the heater 12 can only move linearly back and forth.

[0062] The specific structure of the circulator fixing structure 14 can be as follows: Figure 10As shown: There are two circulator fixing structures 14. Each circulator fixing structure 14 includes a fixing base 141, a pressing screw 142, and a flexible pressure pad 143. The fixing base 141 is connected to the main housing 11, the pressing screw 142 is threaded to the fixing base 141, and the flexible pressure pad 143 is connected to the pressing screw 142. The two circulator fixing structures 14 press down on the left and right sides of the rigid liquid container 21 respectively. The flexible pressure pad 143 can be made of rubber, and its function is to prevent damage to the rigid liquid container 21.

[0063] The specific structure of the liquid dispensing actuator 13 can be as follows: Figure 8 and Figure 9 As shown, the liquid dispensing actuator 13 includes a first electric telescopic rod 131, and an insertion rod 132 is connected to the first electric telescopic rod 131.

[0064] The specific configuration of the clamp 154 ​​in the pipe control block 151 can be as follows: Figure 11 and Figure 12 As shown: The pipe control block 151 has two clamping head holes 1513, which are respectively provided with vertical pipe groove 1511 and horizontal pipe groove 1512; the clamping device 154 includes a second electric telescopic rod 1541 and an elastic clamp 1542; the second electric telescopic rod 1541 is connected to the pipe control block 151, and the elastic clamp 1542 is connected to the second electric telescopic rod 1541, and the elastic clamp 1542 can extend out from the clamping block head 1513. When the elastic clamp 1542 extends out from the clamping block head 1513, it clamps the pipes placed in the vertical pipe groove 1511 and the horizontal pipe groove 1512, and conversely, when it retracts, it releases the clamp.

[0065] The present invention is preferably as follows Figure 3 , Figure 4 and Figure 14 As shown, the dispensing pump 22 is located on the rear half of the rigid liquid container 21, while the output pipe 23, return pipe 24, return box 26, and transverse connecting pipe 27 are all located on the front half of the rigid liquid container 21. The rear half of the rigid liquid container 21 is located inside the main housing 11, and its front half is located outside the main housing 11, that is, the output pipe 23, return pipe 24, return box 26, and transverse connecting pipe 27 are all located outside the main housing 11.

[0066] Based on the above description, since the return pipe 24 and the transverse connecting pipe 27 are located outside the main housing 11, the pipe control structure 15 needs to be located outside the main housing 11 when in use, and preferably retracted into the main housing 11 when not in use to avoid damage. Therefore, the present invention preferably includes a second guide structure 17 in the hot water injection device; the second guide structure 17 is arranged in the front-to-back direction inside the main housing 11 and located behind the pipe control structure 15. The second guide structure 17 includes a second guide sleeve 172 and a second guide rod 173. The second guide sleeve 172 is connected to the main housing 11, the second guide rod 173 is inserted into the second guide sleeve 172 and cooperates with the second guide sleeve 172, and the pipe control structure 15 is connected to the second guide rod 173.

[0067] When the main unit 1 is in use, the heater 12 and the through-pipe control structure 15 extend out to the front of the main unit housing 11; when not in use, they are retracted into the main unit housing 11. To protect the internal structure of the main unit housing 11 and to maintain its aesthetic appeal, the main unit 1 preferably includes a cover plate 19, which is connected to the main unit and covers the through hole 111. Thus, when the main unit 1 is not in use, the cover plate 19 is closed.

[0068] Cover plate 19 can be a push-pull type, such as... Figure 3 As shown, when opened, the cover 19 is pushed upward into the upper part of the main unit housing 11 and secured using an existing structure to prevent it from falling. When closed, the cover 19 is pulled down.

Claims

1. A hot water injection device, characterized in that: The system includes a main unit (1) and a liquid circulator (2); the main unit (1) includes a main unit housing (11), a heater (12), a circulator fixing structure (14), a controller (18), and two liquid dispensing actuators (13); the front side of the main unit housing (11) has a through hole (111); the heater (12) is disposed on the main unit housing (11) and corresponds to the position of the through hole (111), the heater (12) can move back and forth, and the heater (12) has a circulator placement cavity (122); the liquid dispensing actuators (13) are disposed inside the main unit housing (11) and located above the heater (12), and the liquid dispensing actuators (13) include a rod (132) that can move up and down; the circulator fixing structure (14) and the controller (18) are disposed inside the main unit housing (11), and the controller (18) can control the liquid dispensing actuators (13); The liquid circulator (2) includes a rigid liquid box (21), a suction pipe (25), a return box (26), an output pipe (23), a return pipe (24), and two liquid dispensing pumps (22). The liquid dispensing pumps (22) are vertically arranged at the upper end of the rigid liquid box (21). The liquid dispensing pumps (22) include an inlet check valve (222), a drain check valve (223), a collar (224), and a liquid suction device (221) with a piston rod (2213). The inlet check valve (222) and the drain check valve (223) are connected to the liquid suction device. The internal space of the suction device (221) is open, and the collar (224) is connected to the piston rod (2213); the suction tube (25) is connected to both inlet check valves (222) and extends to the lower part of the rigid liquid box (21); the return box (26) is located at the upper end of the rigid liquid box (21), and the return box (26) has a filter screen (262); the output tube (23) is connected to the rigid liquid box (21) and is connected to the two drain check valves (223) through a pipeline; the return tube (24) is connected to the return box (26); The lower part of the liquid circulator (2) is placed into the circulator placement cavity (122), and two insert rods (132) are inserted into two collars (224) respectively. The circulator fixing structure (14) fixes the rigid liquid box (21).

2. The hot water injection device according to claim 1, characterized in that: The return box (26) includes a return box body (261) and an air intake connector (263). A filter screen (262) is horizontally arranged inside the return box body (261). The lower end of the return box (26) is a drain pipe (2611). A drain control valve (264) is provided on the drain pipe (2611). The operating rod (2641) of the drain control valve (264) extends forward to pass through the rigid liquid box (21). The operating rod (2641) and the rigid liquid box (21) 21) The control lever (2641) is sealed, and a knob (265) is connected to the front end of the control lever (2641). The suction connector (263) is connected to the return box (261). The liquid circulator (2) includes a transverse connecting pipe (27), which connects the output pipe (23) and the return pipe (24). A pipe clamp (231) is provided on the output pipe (23), and the pipe clamp (231) is located in front of the connection point between the transverse connecting pipe (27) and the return pipe (24). The main unit (1) includes a pipe control structure (15), which includes a pipe control block (151), a control block cover (152), a suction device (153), and two clamps (154). The pipe control block (151) has a vertical pipe groove (1511) and a horizontal pipe groove (1512), and the control block cover (152) covers the pipe control block (151). The two clamps (154) are respectively arranged corresponding to the vertical pipe groove (1511) and the horizontal pipe groove (1512). The suction device (153) is connected to the pipe control block (151). The controller (18) can control the clamps (154) and the suction device (153). The return pipe (24) is placed in the vertical pipe groove (1511), the horizontal connecting pipe (27) is placed in the horizontal pipe groove (1512), and the suction device (153) is connected to the suction connector (263) through the pipe.

3. The hot water injection device according to claim 2, characterized in that: The heater (12) includes a water tank (121), a flexible heat-conducting pad (123), and an electric heater (124). The circulator placement cavity (122) is located on the water tank (121). The water tank (121) located below, behind, and on the left and right sides of the circulator placement cavity (122) can hold water. The flexible heat-conducting pad (123) is connected to the lower wall, rear wall, and left and right walls of the circulator placement cavity (122). The water tank (121) located in front of the circulator placement cavity (122) is a transparent plate (125). The electric heater (124) can heat the internal space of the water tank.

4. The hot water injection device according to claim 3, characterized in that: The main unit (1) includes a first guide structure (16); the heater (12) is placed on the main unit housing (11); the first guide structure (16) is arranged in the front-to-back direction inside the main unit housing (11) and located behind the heater (12). The first guide structure (16) includes a first guide sleeve (161) and a first guide rod (162). The first guide sleeve (161) is connected to the main unit housing (11), the first guide rod (162) is inserted into the first guide sleeve (161) and cooperates with the first guide sleeve (161), and the heater (12) is connected to the first guide rod (162).

5. The hot water injection device according to claim 4, characterized in that: There are two circulator fixing structures (14). Each circulator fixing structure (14) includes a fixing seat (141), a pressing screw (142), and a flexible pressure pad (143). The fixing seat (141) is connected to the main housing (11), the pressing screw (142) is threaded to the fixing seat (141), and the flexible pressure pad (143) is connected to the pressing screw (142). The two circulator fixing structures (14) press down on the left and right sides of the rigid liquid box (21) respectively.

6. The hot water injection device according to claim 5, characterized in that: The liquid dispensing actuator (13) includes a first electric telescopic rod (131) and an insertion rod (132) connected to the first electric telescopic rod (131).

7. The hot water injection device according to claim 6, characterized in that: The pipe control block (151) has two clamping head holes (1513), which are respectively provided to correspond to the vertical pipe groove (1511) and the horizontal pipe groove (1512); the clamping device (154) includes a second electric telescopic rod (1541) and an elastic clamp (1542); the second electric telescopic rod (1541) is connected to the pipe control block (151), and the elastic clamp (1542) is connected to the second electric telescopic rod (1541), and the elastic clamp (1542) can extend out from the clamping block head (1513).

8. The hot water injection device according to claim 7, characterized in that: It includes a second guide structure (17); the second guide structure (17) is arranged in the front-to-back direction inside the main housing (11) and located behind the pipe control structure (15). The second guide structure (17) includes a second guide sleeve (172) and a second guide rod (173). The second guide sleeve (172) is connected to the main housing (11). The second guide rod (173) is inserted into the second guide sleeve (172) and cooperates with the second guide sleeve (172). The pipe control structure (15) is connected to the second guide rod (173).

9. The hot water injection device according to claim 8, characterized in that: The main unit (1) includes a cover plate (19), which is connected to the main unit and can cover the through hole (111).

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