Cooling module based on Peltier condensation and air pathogen sampling machine

Abstract

The invention relates to the field of aerosol sampling, in particular to a cooling module based on Peltier condensation and an air pathogen sampler, the cooling module comprises a shell, a water cooling head, a cold conducting piece and a Peltier, the water cooling head, the cold conducting piece and the Peltier are all installed in the shell, the water cooling head is located on the hot surface of the Peltier, and the cold conducting piece is located on the hot surface of the Peltier. A snakelike flow guide channel is formed in the water cooling head, the bottom of the snakelike flow guide channel communicates with a water pipe used for bearing circulating water, and the cold guide piece is located on the cold face of the Peltier and tightly attached to the outer wall of the air pipe. According to the product, rapid cooling of air is achieved through the Peltier, condensation nucleuses are formed after water vapor in the air is condensed, and enrichment sampling of pathogens in the air is achieved along with flowing of condensation particles; the problems that a traditional refrigerating system is large in size and complex in maintenance can be solved, and the moving portability and the maintenance efficiency are improved; according to the product, efficient refrigeration and stable cold insulation of air are achieved, and the collection efficiency of air samples is improved.

Description

Technical Field

[0001] The present invention relates to the field of aerosol sampling, and specifically to a cooling module based on Peltier condensation and an air pathogen sampler. Background Art

[0002] In the field of infectious disease prevention and control, respiratory infectious diseases have always been a major challenge, and such infectious diseases do not appear transiently, so it is necessary to detect their pathogens. Pathogens in the air include bacteria, viruses, fungi, etc., and some pathogens are adsorbed on particulate matter. The detection of conventional pathogens is mainly by culture method, which requires professional operation and has high detection costs and time. And the content of pathogens in the air is low, so it is necessary to cool and collect aerosols. With the continuous development of air cooling sampling technology, there is still room for improvement in the cooling efficiency and portability of existing devices.

[0003] The utility model patent with the patent number CN209655882U discloses a sealed water circulation heat dissipation system, which combines a Peltier refrigeration sheet and a heat exchanger for water circulation heat dissipation. However, the heat dissipation efficiency needs to be improved, the cold preservation ability is weak, it cannot maintain long-term low-temperature stability, and it is not combined with the sampling process and is only used for independent heat dissipation, resulting in energy waste. The components of this system are rigidly fixed by bolts and springs, and the whole needs to be replaced during maintenance. The invention patent with the patent number CN108895764B discloses a multi-stage cascade semiconductor ultra-low temperature rapid temperature rise and fall device, which gradually cools down through a secondary refrigeration sheet and relies on a physically superimposed structure, but it has a large volume, high maintenance difficulty, low reliability, and is difficult to be integrated into portable devices. Summary of the Invention

[0004] The present invention mainly solves the collection and condensation requirements of biological aerosol sampling. By using Peltier to replace the traditional refrigeration method, the equipment is made lighter. The energy consumption and operation noise are reduced, and the environmental adaptability is improved. The maintenance process is simplified and the condensation efficiency is increased.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A cooling module based on Peltier condensation includes a housing, a water-cooled head, a heat conduction member, and a Peltier. The water-cooled head, the heat conduction member, and the Peltier are all installed inside the housing. The water-cooled head is located on the hot surface of the Peltier. A serpentine diversion channel is provided inside the water-cooled head, and the bottom of the serpentine diversion channel is connected to a water pipe for carrying circulating water. The heat conduction member is located on the cold surface of the Peltier and is closely attached to the outer wall of the air pipe. The water-cooled head is responsible for dissipating the heat on the hot surface of the Peltier, the heat conduction member is responsible for conducting cold, and the air pipe finally collects the condensed liquid into the sampling tube. By directly sampling air through the active refrigeration method of Peltier condensation, the pathogens in the air can be enriched and further detected.

[0007] As a further solution of the present invention: The housing includes a cover body and a base, and the cover body and the base are connected by a slide rail push-pull interface, which can be quickly assembled or disassembled without screw fixation, facilitating rapid maintenance.

[0008] As a further solution of the present invention: Both the cover body and the base are made of high-density engineering plastics (such as ABS or PETG). Their low thermal conductivity coefficient can effectively block the heat transfer from the external environment to the interior, playing a role in heat insulation and cold preservation, greatly reducing the conduction of external heat to the internal refrigeration cavity, making the cold preservation performance significantly superior to that of traditional metal shells, and maintaining the low-temperature environment inside the housing. At the same time, the weight of the housing is only about 200g, greatly reducing the overall load of the equipment. It is a lightweight design that can improve the flexibility and portability of the movement of the sampling equipment and is suitable for complex environments such as hospitals and laboratories.

[0009] As a further solution of the present invention: The water-cooled head is made of aluminum alloy material. The aluminum alloy material has a small thermal inertia and a relatively fast cooling speed. The heat conduction part is made of copper material, and copper has good thermal conductivity and can improve the structural strength.

[0010] As a further solution of the present invention: The Peltier is connected to the heat conduction part and the water-cooled head respectively by thermal conductive silicone grease. Thermal conductive silicone grease is a paste material with high thermal conductivity, which is used to fill the gaps of the contact surface to make it close, and can reduce the contact thermal resistance.

[0011] As a further solution of the present invention: A temperature sensor is installed on the Peltier. The temperature sensor feeds back the real-time temperature, enabling the device to stabilize the sampling temperature at the target temperature, quickly condense the collected air, and collect it into the sampling tube.

[0012] As a further solution of the present invention: A Peltier-based condensation cooling module further includes a cold row fan. The cold row fan can cause air convection to achieve heat dissipation, and when used in combination with the water-cooled head, it can further improve the use effect.

[0013] An air pathogen sampler based on Peltier condensation includes the Peltier-based condensation cooling module and an air path module. The air path module includes an air pump, an air pipe, and a sampling tube. The intake end of the air pipe is connected to an external air collector, and the outlet end of the air pipe is connected to the sampling tube. The air pump is used to provide the power for the gas flow in the air pipe.

[0014] The working method of the air pathogen sampler based on Peltier condensation is as follows:

[0015] After the Peltier is powered on, it starts. The temperature of the cold surface of the Peltier drops rapidly, and the cold surface quickly cools the gas in the air pipe through the heat conduction part;

[0016] The air enters the trachea, and the gas flowing through the trachea is cooled and enters the subsequent sampling tube through the air outlet of the trachea for easy collection. The air and pathogens in the trachea condense into droplets due to the low temperature and enter the subsequent links with the air flow;

[0017] The heat generated by the hot surface of the Peltier is discharged through the water cooling head. The cooling water flows in from the water pipe at the bottom of the water cooling head, forms a water circulation along the serpentine guide channel inside the water cooling head, and is then discharged. The water circulation power is provided by a water pump.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This product uses Peltier technology to achieve rapid cooling of the air. Water vapor in the air condenses to form condensation nuclei. As the condensed particles flow, the enrichment sampling of pathogens in the air can be achieved. This product can solve the problems of large volume and complex maintenance of traditional refrigeration systems (low-temperature coolant circulation instruments on the market), and improve portability and maintenance efficiency.

[0020] This product uses a Peltier-based cooling module to achieve efficient cooling and stable cooling of the air, thereby improving the efficiency of collecting air samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of a cooling module based on Peltier condensation in an embodiment of the present invention.

[0022] Figure 2 A side view of a cooling module based on Peltier condensation in an embodiment of the present invention with the outer shell removed.

[0023] Figure 3 A front view of a cooling module based on Peltier condensation in an embodiment of the present invention with its outer shell removed.

[0024] Figure 4 4 is a flowchart of a cooling module based on Peltier condensation in an embodiment of the present invention.

[0025] In the figure: 1- water cooling head, 2- cooling element, 3- Peltier, 4- air pipe, 5- cover, 6- base. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] This product implements a distributed cooling strategy of conduction cooling and heat dissipation, establishes a compensation mechanism for the contact surface thermal resistance, combines the copper conduction cooling component with the water-cooled head made of aluminum alloy material, taking into account both the refrigeration efficiency and the structural strength. At the same time, it constructs an isolation environment with low thermal conductivity to achieve the effect of prolonging cold preservation, makes full use of energy consumption, and greatly improves the overall cooling efficiency.

[0028] In this product, the Peltier combined with the conduction cooling component uses a wedge clamping air pipe method for condensation. The cold surface uses contact surface conduction cooling (conduction cooling component and air pipe), and the hot surface uses fluid heat dissipation (Peltier, water-cooled head, and circulating water). The cold surfaces of the combined structure of multiple Peltier elements are closely attached to the conduction cooling component, enabling the cold quantity to be quickly and evenly transferred to the air pipe.

[0029] This product can increase the condensation nuclei formed after air cooling, which is beneficial for subsequent sampling and can greatly increase the recovery efficiency of micro-particles (such as virus particles).

[0030] The following describes the specific implementation of the present invention in detail in combination with specific embodiments.

[0031] Example 1, please refer to Figures 1 - 3 , a cooling module based on Peltier condensation, including a housing, a water-cooled head 1, a conduction cooling component 2, and a Peltier 3. The water-cooled head 1, the conduction cooling component 2, and the Peltier 3 are all installed inside the housing. The water-cooled head 1 is located on the hot surface of the Peltier 3. The inside of the water-cooled head 1 is provided with a serpentine diversion channel, and the bottom of the serpentine diversion channel is connected to a water pipe for carrying circulating water. The conduction cooling component 2 is located on the cold surface of the Peltier 3 and is closely attached to the outer wall of the air pipe 4. The water-cooled head 1 is responsible for the heat dissipation of the hot surface of the Peltier 3, the conduction cooling component 2 is responsible for conducting the cold quantity, and the air pipe 4 finally collects the liquid obtained by condensation into the sampling tube. The Peltier 3 is a common semiconductor refrigeration chip in the art and will not be elaborated in detail in the present invention. By directly sampling air through the active refrigeration method of Peltier 3 condensation, pathogens in the air can be enriched and further detected. Further, the number of Peltier 3 is multiple, and multiple Peltier 3 cooperate to ensure that the cold quantity is quickly and evenly transferred to the air pipe 4.

[0032] In an embodiment of the present invention, the housing includes a cover body 5 and a base 6. The cover body 5 and the base 6 are connected by a slide rail push-pull type interface, and can be quickly assembled or disassembled without screw fixation, facilitating quick maintenance.

[0033] In one embodiment of the present invention, both the cover body 5 and the base 6 are made of high-density engineering plastics (such as ABS or PETG). Their low thermal conductivity can effectively block the heat transfer from the external environment to the inside, playing a role in heat insulation and cold preservation, greatly reducing the conduction of external heat to the internal refrigeration chamber, making the cold preservation performance significantly better than that of traditional metal casings, and maintaining the low-temperature environment inside the casing. At the same time, the weight of the casing made of this material is only about 200g, greatly reducing the overall load of the equipment. It is a lightweight design that can improve the flexibility and portability of the sampling equipment when moving, and is suitable for complex environments such as hospitals and laboratories.

[0034] In one embodiment of the present invention, the water-cooled head 1 is made of aluminum alloy material. The aluminum alloy material has a small thermal inertia and a relatively fast cooling rate. The heat conduction member 2 is made of copper material. Copper has good thermal conductivity and can improve the structural strength. Further, the heat conduction member 2 is made of red copper, and the use effect is better.

[0035] In one embodiment of the present invention, the Peltier 3 is connected to the heat conduction member 2 and the water-cooled head 1 respectively by thermal conductive grease. Thermal conductive grease is a paste material with high thermal conductivity, which is used to fill the gaps on the contact surface to make it close, and can reduce the contact thermal resistance.

[0036] As a further solution of the present invention: a temperature sensor is also installed on the Peltier 3. The temperature sensor feeds back the real-time temperature, so that the device can stabilize the sampling temperature at the target temperature, quickly condense the collected air, and collect it into the sampling tube.

[0037] A cooling module based on Peltier condensation further includes a cold radiator fan. The cold radiator fan can cause air convection to achieve heat dissipation, and further improve the use effect when used in conjunction with the water-cooled head 1.

[0038] An air pathogen sampler based on Peltier condensation includes the cooling module based on Peltier condensation and an air path module. The air path module includes an air pump, an air pipe 4 and a sampling tube. The inlet end of the air pipe 4 is connected to an external air collector, and the outlet end of the air pipe 4 is connected to the sampling tube. The air pump is used to provide the power for the gas flow in the air pipe 4.

[0039] Refer to Figure 4 , the working method of the air pathogen sampler based on Peltier condensation is as follows:

[0040] After being powered on, the Peltier 3 starts, and the temperature of the cold surface of the Peltier 3 drops suddenly. The cold surface quickly cools the gas in the air pipe 4 through the heat conduction member 2;

[0041] Air enters the air pipe 4. The gas flowing through the air pipe 4 is cooled, enters the subsequent sampling tube through the outlet end of the air pipe 4 for easy collection. The air and pathogens in the air pipe 4 condense into droplets due to the low temperature and enter the subsequent links with the air flow;

[0042] The heat generated by the hot surface of the Peltier 3 is exported through the water-cooling head 1. The cooling water flows in from the water pipe at the bottom of the water-cooling head 1, forms a water cycle along the serpentine diversion channel inside the water-cooling head 1 and then is discharged. The power of the water cycle is provided by a water pump.

[0043] In summary, the present product has the following advantages:

[0044] High sampling efficiency, realizing synchronous sampling and temperature control: The concentration of the sampling result is high. There is no need to add a collection solution in advance, effectively avoiding the dilution of pathogen samples and ensuring a high sample concentration. Through the data fed back by the temperature sensor combined with the temperature control algorithm, the refrigeration power is dynamically adjusted to ensure that the temperature quickly reaches the target temperature and remains stable during the sampling process, avoiding the temperature lag problem caused by thermal inertia in the traditional scheme.

[0045] The refrigeration core is concentrated and the power consumption utilization rate is high: The gas pipe 4 for sampling is embedded and clamped inside the cooling module, eliminating redundant structures and abandoning the traditional independent refrigeration unit, realizing an integrated circulating cooling flow path and a refrigeration coupling structure. At the same time, multiple Peltier 3s are used for refrigeration. While increasing the cooling capacity, it directly acts on the gas pipe 4 for gas collection, improving the refrigeration density per unit volume and the cooling effect. The copper heat-conducting part 2, with its characteristic of high thermal conductivity, quickly conducts heat from the heat source to the heat dissipation area. At the same time, its characteristic of high thermal inertia makes it suitable as a heat source contact layer to undertake the functions of heat absorption and conduction. The serpentine diversion channel in the water-cooling head 1 made of aluminum alloy forces the laminar flow state to be disrupted, introduces turbulent flow, enhances convective heat transfer, reduces the thickness of the thermal boundary layer, increases the heat transfer area, significantly improves the heat transfer efficiency, and at the same time, with its characteristics of low thermal conductivity and low thermal inertia, quickly responds to temperature changes, can also reduce power consumption, and is suitable as a heat dissipation surface structure to quickly release heat. The thermal conductive silicone grease fills the microscopic gaps, reducing the contact thermal resistance and making the overall refrigeration working efficiency higher. The present invention provides a composite heat dissipation architecture, which can shorten the heat conduction path. Combined with the cooperative refrigeration of multiple Peltier 3s, it realizes the rapid increase and uniform distribution of the cooling capacity, can achieve the effect of cold preservation while ensuring the cooling speed, and significantly reduces the operating energy consumption. This patent overcomes the technical bottleneck that it is difficult to have both "efficient refrigeration", "lightweight" and "long endurance" in mobile sampling equipment through the deep integration of the plastic shell and the copper-aluminum composite architecture.

[0046] Portability and mobility: The present invention uses a Peltier device 3 for temperature cooling and designs a composite heat dissipation architecture to achieve the miniaturization and portability requirements of the collector, breaking through the reduction of the device volume and weight, and adapting to various mobile sampling and detection scenarios. The design of the modular structure enables the Peltier device 3 to be quickly disassembled and maintained, improving the maintenance efficiency. A disposable closed sample collection and sampling tube is adopted, with automated operation. During sampling, the air pump automatically docks with the trachea, and there is no exposed gas path, providing high-efficiency anti-pollution. The device is lightweight and convenient, integrating the cooling module and the sampling flow channel into one, with a significantly reduced volume compared to traditional split devices and facilitating surface disinfection.

[0047] It should be noted that in the present invention, unless otherwise clearly specified and defined, terms such as "rotation", "fixation", and "provided with" should be understood in a broad sense. For example, it can be a welded connection, a bolt connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cooling module based on Peltier condensation, comprising a housing, a water cooling head, a cooling member and a Peltier, wherein the water cooling head, the cooling member and the Peltier are all installed in the housing, characterized in that: The water cooling head is located on the hot side of the Peltier, a serpentine flow guide channel is provided inside the water cooling head and the bottom of the serpentine flow guide channel is connected to a water pipe for carrying circulating water, the cooling member is located on the cold side of the Peltier and is tightly attached to the outer wall of the air pipe.

2. The cooling module based on Peltier condensation according to claim 1, characterized in that: The shell comprises a cover body and a base, and the cover body and the base are connected by a slide rail push-pull interface.

3. The cooling module based on Peltier condensation according to claim 2, characterized in that: The cover and the base are both made of high-density engineering plastics.

4. The cooling module based on Peltier condensation according to claim 1, characterized in that: The water cooling head is made of aluminum alloy, and the cooling member is made of copper.

5. The cooling module based on Peltier condensation according to claim 1, characterized in that: The Peltier is connected to the cooling member and the water cooling head respectively by using thermal conductive silicone grease.

6. The cooling module based on Peltier condensation according to claim 1 or 5, characterized in that: A temperature sensor is installed on the Peltier.

7. The cooling module based on Peltier condensation according to claim 6, characterized in that: Also includes a cooling fan.

8. An air pathogen sampler based on Peltier condensation, characterized in that: It comprises a cooling module based on Peltier condensation and an air path module as described in any one of claims 1 to 7, wherein the air path module comprises an air pump, an air pipe and a sampling tube, wherein the air inlet end of the air pipe is connected to an external air collector, the air outlet end of the air pipe is connected to the sampling tube, and the air pump is used to provide power for the gas circulation in the air pipe.

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