CN215413055U - Cold and hot air switching device - Google Patents
Cold and hot air switching device Download PDFInfo
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- CN215413055U CN215413055U CN202120308285.0U CN202120308285U CN215413055U CN 215413055 U CN215413055 U CN 215413055U CN 202120308285 U CN202120308285 U CN 202120308285U CN 215413055 U CN215413055 U CN 215413055U
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- hot air
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- 238000010438 heat treatment Methods 0.000 claims abstract description 86
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000001631 haemodialysis Methods 0.000 description 2
- 230000000322 hemodialysis Effects 0.000 description 2
- 208000009304 Acute Kidney Injury Diseases 0.000 description 1
- 208000033626 Renal failure acute Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 201000011040 acute kidney failure Diseases 0.000 description 1
- 208000012998 acute renal failure Diseases 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 208000020832 chronic kidney disease Diseases 0.000 description 1
- 208000022831 chronic renal failure syndrome Diseases 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a cold and hot air switching device which comprises an air inlet assembly, a reversing valve, an air outlet pipeline and a heating assembly for heating air, wherein the air inlet assembly is communicated with an inlet of the reversing valve; the heating assembly comprises a heating cavity and an air heater; one end of the heating cavity is provided with a cold air inlet which is communicated with the other outlet of the reversing valve; the other end of the heating cavity is provided with a hot air outlet which is communicated with the air outlet pipeline; the air heater is arranged in the heating cavity. The cold and hot air switching device has the advantages of compact structure, convenience in cold and hot switching, uniformity and stability in heating, high safety and convenience in maintenance.
Description
Technical Field
The utility model relates to a gas switching device, in particular to a cold and hot air switching device.
Background
Hemodialysis is one of the kidney replacement treatment modes of patients with acute and chronic renal failure, and a hemodialyzer (dialyzer for short) is a pipeline and a container for exchanging solutes between blood and dialysate and is a key part of hemodialysis. The dialyzer needs to be subjected to wet leakage detection in the preparation process, and needs to be dried after the wet leakage detection, and cold and hot air needs to be switched in the drying process. The traditional resistance heating rod is mostly adopted to heat air by dialyzer drying equipment used by existing medical enterprises, and cold and hot pipelines are separately controlled. The temperature of the resistance heating rod rises slowly and the heat dissipation is uneven. In addition, the space limitation of the equipment causes the pipeline to be staggered and coiled, the fault occurs and the disassembly and the maintenance are very difficult.
Disclosure of Invention
In view of at least one of the problems of the background art, the present invention provides a hot and cold air switching device having a fast and uniform heating speed.
In order to solve at least one problem, the utility model adopts the following technical scheme:
the utility model provides a cold and hot air switching device, which comprises an air inlet assembly, a reversing valve, an air outlet pipeline and a heating assembly for heating air, wherein the air inlet assembly is communicated with an inlet of the reversing valve; and is
The heating assembly comprises a heating cavity and an air heater; one end of the heating cavity is provided with a cold air inlet which is communicated with the other outlet of the reversing valve; the other end of the heating cavity is provided with a hot air outlet which is communicated with the air outlet pipeline; the air heater is arranged in the heating cavity,
the heater is provided with a heating part, the length of the heating part is at least 1/2 of the length of the heating cavity, and the length direction of the heating part is the same as the length direction of the heating cavity; the heating part comprises a heating tube and radiating fins arranged on the heating tube.
Optionally, the heater is a U-shaped helical cylindrical fin heater.
Optionally, the cold-hot air switching device further includes a first thermocouple for detecting the temperature of the air in the heating cavity, and the first thermocouple is disposed on the heating cavity and close to the hot air outlet.
Optionally, the heating chamber comprises a heating cartridge, a first flange and a second flange; the first flange and the second flange are respectively arranged at two ends of the heating cylinder and are sealed through a sealing ring and a screw; the first thermocouple is installed on the first flange, the air heater is installed on the second flange, and a power supply box used for supplying power to the air heater is arranged on the outer side of the second flange.
Optionally, the other outlet of the reversing valve is connected with the cold air inlet through a union; a tee joint is arranged between the medical pipeline and the air outlet pipeline, and the hot air outlet is connected with the tee joint through a union.
Optionally, the cold-hot air switching device further includes a second thermocouple for detecting the temperature of the air in the air outlet pipeline, and the second thermocouple is disposed on the air outlet pipeline.
Optionally, the intake assembly comprises an intake pipe and a pressure regulating valve for regulating intake pressure.
Optionally, the pressure regulating valve is a pressure regulating valve driven by compressed air, and the direction changing valve is a direction changing valve driven by compressed air.
The air heater adopted by the cold and hot air switching device has large heat dissipation area and high heating speed, and can ensure that the temperature of the air in the heating cavity is uniform. Furthermore, the air inlet pressure can be adjusted through the pressure adjusting valve, the air circulation direction can be switched through the reversing valve, and the air inlet pressure adjusting valve is convenient to control and use. The pressure regulating valve and the reversing valve are driven by compressed air, and automatic control can be realized. The first thermocouple and the second thermocouple are arranged to form closed-loop control, and the temperature of the air in the heating cavity is kept stable. The reversing valve is matched with the tee joint, so that the layout of the whole set of pipelines is simplified. Each key connector is connected by a union, so that the detection and maintenance are convenient. That is to say, the cold and hot air switching device has the advantages of compact and simple structure, small occupied space, convenience in cold and hot switching, uniformity and stability in heating, high safety, convenience in maintenance, easiness in maintenance and the like.
Drawings
In order to illustrate more clearly the embodiments of the utility model or the solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained by those skilled in the art without inventive exercise from these drawings, it being understood that these drawings are not necessarily drawn to scale.
Fig. 1 is a schematic view of a cold-hot air switching device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a hot and cold air switching device, as shown in fig. 1, which includes an air inlet assembly, a reversing valve 12, an air outlet pipe 16, and a heating assembly for heating air. The inlet assembly communicates with an inlet of a diverter valve 12, and an outlet of the diverter valve 12 communicates with an outlet conduit 16 via a medical conduit 14. The heating assembly includes a heating chamber and an air heater 22. One end of the heating cavity is provided with a cold air inlet which is communicated with the other outlet of the reversing valve 12. The other end of the heating cavity is provided with a hot air outlet which is communicated with an air outlet pipeline 16. An air heater 22 is disposed within the heating cavity. The heater is provided with a heating part, the length of the heating part is at least 1/2 of the length of the heating cavity, and the length direction of the heating part is the same as the length direction of the heating cavity. The heating portion may extend along a length direction of the heating chamber. Further, the heating part comprises a heating tube and a radiating fin arranged on the heating tube.
The air heater 22 adopted by the cold and hot air switching device of the embodiment of the utility model has large heat dissipation area and high heating speed, and can ensure that the temperature of the air in the heating cavity is uniform. Preferably, the heater is a U-shaped helical cylindrical fin heater.
In some embodiments of the utility model, the heating chamber comprises a heating cartridge 21, a first flange 23 and a second flange 24. The first flange 23 and the second flange 24 are respectively provided at both ends of the heating cylinder 21, and are sealed by a seal ring and screws. The air heater 22 is mounted to the second flange 24, and a power supply box 25 for supplying power to the air heater 22 is provided outside the second flange 24. The other outlet of the reversing valve 12 is connected with the cold air inlet through a union 13. A tee joint 15 is arranged between the medical pipeline 14 and the air outlet pipeline 16, and the hot air outlet is connected with the tee joint 15 through a union. The reversing valve 12 and the tee 15 simplify the layout of the whole set of pipelines. Each key connector is connected by a union, so that the detection and maintenance are convenient.
In some embodiments of the present invention, the hot and cold air switching device further includes a first thermocouple 31 for detecting the temperature of the air in the heating chamber and a second thermocouple 32 for detecting the temperature of the air in the air outlet duct 16. The first thermocouple 31 is disposed on the heating chamber, and is adjacent to the hot air outlet. Specifically, the first thermocouple 31 is mounted to the first flange 23. Second thermocouple 32 is disposed on outlet pipe 16. The first thermocouple 31 and the second thermocouple 32 are arranged to form closed-loop control, so as to maintain the temperature of the air in the heating cavity to be stable.
In some embodiments of the utility model, the intake assembly comprises an intake pipe and a pressure regulating valve 11 for regulating the intake pressure. The pressure regulating valve 11 is driven by compressed air, and the direction changing valve 12 is driven by compressed air and is a direction changing valve 12. The pressure regulating valve 11 can regulate the air inlet pressure, and the reversing valve 12 can switch the air circulation direction, so that the control is convenient and the use is convenient. The pressure regulating valve 11 and the change valve 12 are driven by compressed air, and automatic control can be realized.
When the cold and hot air switching device of the embodiment of the utility model is used, as shown in fig. 1, an arrow in the figure indicates the air flow direction, cold air enters from the air inlet pipe, enters the reversing valve 12 after being regulated to a required pressure by the pressure regulating valve 11, if the reversing valve 12 does not receive a control signal (the reversing valve 12 does not act), one outlet of the reversing valve 12, as shown in fig. 1, the upper outlet is in an open state, the cold air directly passes through the medical pipeline 14 and is discharged from the outlet of the air outlet pipeline 16, and at this time, the cold air does not pass through or enter the heating assembly (the upper cycle heating assembly works, and the cavity of the heating cavity is filled with hot air). If the reversing valve 12 receives a control signal (the reversing valve 12 is actuated), another outlet of the reversing valve 12, such as the lower outlet shown in fig. 1, is in an open state, cold air enters the heating cavity, and in the heating cavity, the cold air is heated to a required temperature by the air heater 22 and then is discharged from the outlet of the air outlet pipeline 16 through the tee 15, the temperature of the air in the heating cavity is monitored by the first thermocouple 31 and is subjected to real-time feedback regulation, and at this time, the outlet of the air outlet pipeline 16 is hot air and does not pass through the medical pipeline 14 (the pipeline is filled with cold air). A second thermocouple 32 is installed in front of the outlet pipe 16 to monitor the temperature of the cold and hot air flowing out.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A cold and hot air switching device comprises an air inlet assembly, a reversing valve and an air outlet pipeline, and is characterized by further comprising a heating assembly for heating air, wherein the air inlet assembly is communicated with an inlet of the reversing valve, and an outlet of the reversing valve is communicated with the air outlet pipeline through a medical pipeline; and is
The heating assembly comprises a heating cavity and an air heater; one end of the heating cavity is provided with a cold air inlet which is communicated with the other outlet of the reversing valve; the other end of the heating cavity is provided with a hot air outlet which is communicated with the air outlet pipeline; the air heater is arranged in the heating cavity; the heater is provided with a heating part, the length of the heating part is at least 1/2 of the length of the heating cavity, and the length direction of the heating part is the same as the length direction of the heating cavity; the heating part comprises a heating tube and radiating fins arranged on the heating tube.
2. The cold-hot air switching apparatus according to claim 1,
the heater is a U-shaped spiral cylindrical fin heater.
3. The cold-hot air switching device according to claim 1, wherein the heating chamber comprises a heating cylinder, a first flange and a second flange; the first flange and the second flange are respectively arranged at two ends of the heating cylinder and are sealed through a sealing ring and a screw; the air heater is installed in the second flange, and the outside of second flange is provided with and is used for to the power supply box of air heater power supply.
4. The cold-hot air switching device according to claim 3, further comprising a first thermocouple for detecting the temperature of the air in the heating cavity, disposed on the heating cavity and adjacent to the hot air outlet, wherein the first thermocouple is mounted to the first flange.
5. The cold-hot air switching device according to claim 1, further comprising a second thermocouple disposed on the air outlet duct for detecting a temperature of air in the air outlet duct.
6. The cold-hot air switching apparatus according to claim 1, wherein the air intake assembly includes an air intake pipe and a pressure regulating valve for regulating an intake pressure.
7. The cold-hot air switching device according to claim 6,
the pressure regulating valve is driven by compressed air, and the reversing valve is driven by the compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120308285.0U CN215413055U (en) | 2021-02-03 | 2021-02-03 | Cold and hot air switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120308285.0U CN215413055U (en) | 2021-02-03 | 2021-02-03 | Cold and hot air switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215413055U true CN215413055U (en) | 2022-01-04 |
Family
ID=79666579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120308285.0U Active CN215413055U (en) | 2021-02-03 | 2021-02-03 | Cold and hot air switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215413055U (en) |
-
2021
- 2021-02-03 CN CN202120308285.0U patent/CN215413055U/en active Active
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