Liquid oxygen air temperature vaporizer defrosting device for hospital
By installing defrosting pipes and purge heads on both sides of the air-temperature vaporizer, and using hot air to automatically defrost, the problem of frosting of the vaporizer in low-temperature environments is solved, and the low-cost and efficient frost removal effect is achieved, avoiding equipment waste and Operational impact.
Patent Information
- Application Number
- CN202420257043.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-02
AI Technical Summary
Air temperature vaporizers are prone to frost in low temperature environments, affecting the gasification effect and stable gas supply. The existing defrost devices are costly and complex in transformation, resulting in waste of hospital equipment.
Design a defrosting device for hospital liquid oxygen air temperature vaporizer, using hot air to quickly remove frost from fins through vertically installed defrosting pipes and purging heads, including air compressors, electrically harnessed gas supply lines and regulation The valve, combined with temperature and humidity sensors, automatically controls the defrost process, and the modification costs are low.
It realizes rapid and effective frost removal, ensures the normal operation of the air-temperature vaporizer, reduces the transformation cost, avoids waste of equipment, and improves gasification efficiency and gas supply stability.
Smart Images
Figure CN222187893U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of defrosting of liquid oxygen air temperature vaporizers, in particular to a defrosting device for liquid oxygen air temperature vaporizers used in hospitals. Background Art
[0002] Medical institutions often use vaporizers to convert liquid oxygen into gaseous oxygen, that is, they use the natural convection of air to heat the liquid oxygen in the heat exchange tubes, and the liquid oxygen absorbs the heat in the air and vaporizes, thereby vaporizing the liquid oxygen. Among them, the most commonly used vaporizer is the air-temperature vaporizer, which uses the atmospheric environment as a heat source, absorbs the heat in the air through the fins, and instantly vaporizes the liquid oxygen into a gas. At present, air-temperature vaporizers are mainly installed outdoors. During operation, they are easily affected by the atmospheric environment, resulting in frost on the surface of the fin tubes, which seriously affects the heat exchange effect of the vaporizer, leading to problems such as incomplete gasification and unstable gas supply. It is the weakest link in the hospital oxygen supply system.
[0003] In winter when the temperature is low (such as in the north), the evaporation temperature of the air temperature vaporizer is often lower than 0℃, causing the moisture in the air to condense on the surface of the vaporizer to form frost. As the vaporizer absorbs heat for a longer time, the frost will become thicker and thicker, the air flow resistance will increase, the air flow rate will decrease, the heat exchange capacity on the wind side will decrease, and the heat exchange will drop rapidly, greatly affecting the heat transfer effect and operating performance. Therefore, defrosting the air temperature vaporizer is particularly critical.
[0004] Although there are defrosting air temperature vaporizers on the market, there are a large number of air temperature vaporizers that do not have defrosting-free performance in existing hospitals. If all air temperature vaporizers are replaced, it will not only increase the hospital's procurement investment, but also cause the installed air temperature vaporizers to be abandoned, resulting in unnecessary waste. Therefore, it is very important to solve the defrosting problem of air temperature vaporizers without changing the structure of the air temperature vaporizer. Summary of the invention
[0005] In view of this, the utility model proposes a defrosting device for a liquid oxygen air-temperature vaporizer for hospital use, which uses hot air to defrost the air-temperature vaporizer, has good defrosting effect, is simple in system, and has low modification cost.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The defrosting device for liquid oxygen air-temperature vaporizer for hospital use described in the utility model comprises a pair of vertically arranged mounting frames, an air source unit and a defrost purge unit arranged on each of the mounting frames, the mounting frames are arranged relatively and located on both sides of the air-temperature vaporizer; the air source unit comprises an air compressor and an air supply pipeline connected to the air compressor, the air supply pipeline is coated with an electric heating belt, and a regulating valve is arranged on the air supply pipeline; the defrost purge unit comprises a plurality of defrost pipes arranged at intervals on the mounting frames, the defrost pipes are arranged vertically and correspond to the fin gaps of the air-temperature vaporizer, and the defrost pipes have a plurality of purge heads from top to bottom. The beneficial effect is that the utility model installs a plurality of rows of purge heads on both sides of the air-temperature vaporizer in correspondence, and the purge heads are aligned with the fin gaps of the air-temperature vaporizer, and the gaps of the fins are purged by compressed air with a certain temperature, thereby quickly removing the frost on the fins, and the normal operation of the air-temperature vaporizer is not affected at all during the modification process, and the modification cost is low.
[0008] Preferably, the mounting frame is further provided with a plurality of vertical protective sleeves, each of which is provided with a defrost pipe, and the purge head on the defrost pipe extends out of the protective sleeve. During actual installation, the protective sleeve preferably has a stainless steel pipe coated with an anti-corrosion layer to protect the defrost pipe from direct sunlight.
[0009] Preferably, the mounting frame includes a pair of steel pipes arranged at intervals and vertical plates welded to the steel pipes, the protective sleeve is fixed to the vertical plates, and a through hole is provided on the vertical plates for the purge head to pass through. During actual installation, a steel plate is welded to the bottom of the steel pipe, and the steel plate is fixed to the bottom surface foundation by bolts, which is simple and convenient to install; the protective sleeve and the vertical plate can be welded or bolted.
[0010] Preferably, the utility model further comprises a controller, a temperature sensor and a humidity sensor arranged on the mounting frame, wherein the signal output ends of the temperature sensor and the humidity sensor are connected to the signal input end of the controller; the regulating valve is an electric regulating valve, and the control output end of the controller is connected to the control input end of the electric regulating valve. The utility model can perform regular defrosting according to the temperature and humidity of the operating environment of the air temperature vaporizer.
[0011] Compared with the prior art, the utility model has the following advantages: the utility model installs multiple rows of purge heads on both sides of the air temperature vaporizer, and the purge heads are aimed at the fin gaps of the air temperature vaporizer, and uses compressed air with a certain temperature to blow the gaps between the fins, thereby quickly removing frost on the fins. The normal operation of the air temperature vaporizer is not affected at all during the modification process, and the modification cost is low. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model.
[0013] Figure 2 It is a side view of the utility model (a set of defrost purge units is omitted).
[0014] Figure 3 yes Figure 2 Rear view of.
[0015] Figure 4 It is a circuit principle block diagram of the utility model. DETAILED DESCRIPTION
[0016] The following is a detailed description of an embodiment of the utility model in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific operation process are given, but the protection scope of the utility model is not limited to the following embodiment.
[0017] It should be noted that, in the description of the present utility model, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.
[0018] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" that may appear 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, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0019] It should be pointed out that the controller of the present invention can be a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), multiple microprocessors, one or more microprocessors associated with a DSP core, a controller, a microcontroller, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) circuit, any other type of integrated circuit (IC) and a state machine, etc. It can also be a PLC, or an industrial computer or a host computer with important computer properties and characteristics, etc.
[0020] like Figure 1-3As shown, the defrosting device for liquid oxygen air-temperature vaporizer for hospital use described in the utility model comprises a pair of vertically arranged mounting frames 1, an air source unit and a defrost purge unit 3 arranged on each mounting frame 1, and the mounting frames 1 are relatively arranged on both sides of the air-temperature vaporizer 2; the air source unit comprises an air compressor 4.1 and an air supply pipeline 4.2 connected to the air compressor 4.1, the air supply pipeline 4.2 is coated with an electric heating belt 4.4, and a regulating valve 4.3 is arranged on the air supply pipeline 4.2; the defrost purge unit 3 comprises a plurality of defrost pipes 3.1 arranged at intervals on the mounting frame 1, the defrost pipes 3.1 are arranged vertically and correspond to the fin gaps of the air-temperature vaporizer 2, and the defrost pipes 3.1 are provided with a plurality of purge heads 3.2 from top to bottom. In the utility model, since the defrost pipe 3.1 is installed vertically and directly facing the gap between the fins, it can be blown directly to the gap between the fins, thereby quickly removing the frost on the fins, which is fast and efficient; in addition, the utility model uses the mounting frame 1 to install the defrost pipe 3.1 on both sides of the air temperature evaporator 2, which has little impact on the air temperature evaporator 2 and has a low modification cost.
[0021] In actual installation, the air compressor 4.1 uses an oil-free air compressor with a pressure of 0.3Mpa. Using a relatively low-pressure air compressor 4.1 can not only reduce energy consumption, but also avoid generating large noise during the purging process. The air compressor 4.1 is preferably installed in an auxiliary room of the hospital oxygen station, and the air supply pipeline 4.2 in the auxiliary room is covered with an electric heating cable 4.4.
[0022] Combination Figure 1 It can be seen that the mounting frame 1 includes a pair of steel pipes 1.1 arranged at intervals and vertical plates 1.2 welded to the steel pipes 1.1, a steel plate 1.3 is welded to the bottom of the steel pipe 1.1, and each steel plate 1.3 is fixed to the ground by expansion bolts, thereby achieving the fixation of the mounting frame 1, and the installation is quick; a plurality of vertical protective sleeves 1.4 are installed on each vertical plate 1.2 (preferably a stainless steel pipe 1.1 coated with an anti-corrosion layer, the stainless steel pipe 1.1 and the vertical plate 1.2 are welded together, and of course they can also be bolted together), the protective sleeves 1.4 correspond to the gaps of the air temperature vaporizer 2 one by one, and a defrost pipe 3.1 is fixed in each protective sleeve 1.4, and the purge head 3.2 on the defrost pipe 3.1 passes through the protective sleeve 1.4 and the vertical plate 1.2 in turn and points to the gap of the air temperature vaporizer 2, ensuring that the purge head 3.2 blows toward the gap of the air temperature vaporizer 2 to achieve rapid defrosting. When working, the air compressor 4.1 delivers air with a certain pressure into each vertical defrost pipe 3.1 through the air supply pipeline 4.2, and blows the air to the gap between the fins of the air temperature evaporator 2 through each row of purge heads 3.2 on the defrost pipe 3.1, so as to achieve rapid defrosting.
[0023] Combination Figure 1 , 4It can be seen that the regulating valve 4.3 is an electric regulating valve; a controller 5.1, a temperature sensor 5.2 and a humidity sensor 5.3 are also provided on one of the mounting frames 1. The signal output end of the temperature sensor 5.2 and the signal output end of the humidity sensor 5.3 are both connected to the signal input end of the controller 5.1; the control output end of the controller 5.1 is connected to the control input end of the electric regulating valve and the control input end of the air compressor 4.1. The temperature sensor 5.2 and the humidity sensor 5.3 transmit the detected signals to the controller 5.1 respectively. When one of the temperature and humidity reaches the set value, the controller controls the air compressor 4.1 and the electric valve to open, and blows to the gap between the fins through the purge head 3.2 to achieve automatic defrosting. Of course, manual periodic defrosting can also be used.
[0024] Finally, it should be emphasized that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A liquid oxygen air temperature vaporizer defrosting device for hospital use, characterized in that: It includes a pair of vertically arranged mounting frames, an air source unit and a defrost purge unit arranged on each of the mounting frames, the mounting frames are arranged relatively to each other and are located on both sides of the air temperature evaporator; the air source unit includes an air compressor and an air supply pipeline connected to the air compressor, the air supply pipeline is coated with an electric heating belt, and a regulating valve is arranged on the air supply pipeline; the defrost purge unit includes a plurality of defrost pipes arranged at intervals on the mounting frames, the defrost pipes are arranged vertically and correspond to the fin gaps of the air temperature evaporator, and the defrost pipes are provided with a plurality of purge heads from top to bottom.
2. The defrosting device for liquid oxygen air temperature vaporizer for hospital use according to claim 1, characterized in that: A plurality of vertical protective sleeves are also arranged on the mounting frame, each of the protective sleeves is provided with a defrost pipe, and a purge head on the defrost pipe extends out of the protective sleeve.
3. The defrosting device for liquid oxygen air temperature vaporizer for hospital use according to claim 2, characterized in that: The mounting frame includes a pair of steel pipes arranged at intervals and vertical plates welded on the steel pipes. The protective sleeve is fixed on the vertical plates, and a through hole is opened on the vertical plates for the purge head to pass through.
4. The defrosting device for liquid oxygen air temperature vaporizer for hospital use according to claim 1, characterized in that: It also includes a controller, a temperature sensor and a humidity sensor arranged on the mounting frame, wherein the signal output ends of the temperature sensor and the humidity sensor are connected to the signal input end of the controller; the regulating valve is an electric regulating valve, and the control output end of the controller is connected to the control input end of the electric regulating valve.