Cold cone structure with double refrigeration modes

Abstract

The invention provides a double-refrigeration-mode cold cone structure which plays a role in eliminating tail flames, improves the heat dissipation effect at the same time, and can prevent a sample from entering the interior of a cold cone and reduce pollution of a cone opening through air cooling and reverse blowing modes. The heat dissipation structure comprises a heat dissipation block, the center area of the heat dissipation block is concaved inwards to form a cold cone installation cavity, the periphery, corresponding to the cold cone installation cavity, of the heat dissipation block is provided with heat dissipation water ways which are annularly distributed, the heat dissipation block is provided with channel inlets and channel outlets corresponding to the heat dissipation water ways, and an air inlet channel is further formed in the thickness direction of the heat dissipation block; the tail flame cutting cone comprises a cutting cone part and a heat dissipation block connecting part, a plurality of vent holes are annularly distributed in the outer circumference of the upper portion of the heat dissipation block connecting part, and the vent holes are communicated with an inner cavity of the heat dissipation block connecting part; and a perspective window.

Description

Technical Field

[0001] This invention relates to the technical field of analytical instruments, specifically to a cold cone structure with dual cooling methods. Background Technology

[0002] Currently, in horizontal observation applications of ICP OES, plasma tail flame elimination techniques are required to reduce the impact of tail flame background during analysis. Tail flame elimination techniques mainly employ air cutting and cold cone methods. Air cutting requires an air blade for tail flame elimination, while the cold cone method completely eliminates tail flame, reduces structural background caused by molecular background, offers good linearity, and provides plasma stability. However, it can cause contamination of the cone tip for the analysis of high-salt or organic samples, requiring timely cleaning and maintenance. Therefore, how to eliminate tail flame while minimizing cone tip contamination is a pressing technical problem that cold cone structures need to solve. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a cold cone structure with dual cooling methods, which eliminates the exhaust flame, improves heat dissipation, and prevents samples from entering the cold cone through air cooling and backflushing, thus reducing contamination at the cone opening.

[0004] A cold cone structure with dual cooling methods, characterized in that it comprises: The heat sink has a central recessed area forming a cold cone mounting cavity. A ring of cooling water channels is provided around the outer periphery of the heat sink corresponding to the cold cone mounting cavity. The heat sink has a channel inlet and a channel outlet corresponding to the cooling water channels. An air inlet channel is also provided in the thickness direction of the heat sink. The tail flame cutting cone includes a cutting cone part and a connecting heat sink part. The upper outer ring of the connecting heat sink part is provided with a number of vent holes, which are connected to the inner cavity of the connecting heat sink part. And perspective windows; The connecting heat sink portion of the tail flame cutting cone is embedded in the cold cone mounting cavity, and the cutting cone portion protrudes outward from the corresponding surface of the heat sink. The lower end of the connecting heat sink portion encloses another opening area of ​​the cold cone mounting cavity through a viewing window. The lower outer part of the connecting heat sink portion and the inner wall of the cold cone mounting cavity combine to form an airflow annular cavity, which is connected to the air intake channel and several vent holes.

[0005] Its further features are: The heat sink connection includes a connecting ring and a lower convex pressure ring. The lower convex pressure ring is provided at the bottom of the connecting ring. Several ventilation holes are arranged around the outer periphery of the connecting ring. The inner diameter of the lower convex pressure ring is larger than the inner diameter of the connecting ring, and the outer diameter of the lower convex pressure ring is smaller than the outer diameter of the connecting ring. The viewing window is embedded in the annular cavity of the lower convex pressure ring. The cold cone mounting cavity is provided with a sealing ring stop, a connecting ring wall, a conductive ring wall, and a connecting hole wall in sequence from top to bottom. The sealing ring stop is fitted with a first sealing ring. The connecting ring wall is used to connect the connecting ring. The conductive ring wall is used to form an airflow annular cavity. A viewing window mounting stop is provided between the conductive ring wall and the connecting hole wall. The connecting hole wall contains a connecting hole. The bottom lower surface of the viewing window is provided with a second sealing ring. The lower surface of the second sealing ring is in close contact with the mounting stop of the viewing window, which prevents the cooling gas in the airflow ring cavity from flowing out of the connecting hole, ensuring that the airflow ring cavity is only used to connect the air intake channel and several ventilation holes. Each set of vent holes is also provided with a connecting groove on the outer wall. The connecting groove extends along the thickness direction of the connecting ring and connects the gas in the airflow ring cavity to the vent hole. The connecting ring and the connecting ring wall are connected by threads, which ensures a stable and reliable connection. The cutting cone portion includes an outer peripheral stop cover and a cutting cone protrusion. The center of the cutting cone protrusion is provided with an air hole. The lower surface of the outer peripheral stop cover is arranged in close contact with the upper surface of the heat sink to form a sufficient thermally conductive contact area and ensure that the liquid cooling heat dissipation is sufficient and reliable. The heat dissipation water channel is assembled by setting concave blind holes in the thickness direction of the heat dissipation block. The two ends of one adjacent side of the heat dissipation water channel are respectively provided with a channel inlet and a channel outlet. The water channels between the channel inlet and the channel outlet are not connected. An air inlet is provided in the area between the channel inlet and the channel outlet. The outer end of the air intake channel is connected to the air intake, and the inner end of the air intake channel is connected to the airflow annular cavity.

[0006] With the solution of this invention, the tail flame cutting cone is fixed on the cold cone mounting cavity of the heat sink. Ventilation holes are provided around the circumference of the tail flame cutting cone, connecting to its inner cavity. Cooling gas introduced from the air inlet channel enters the airflow annular cavity and then enters the inner cavity of the tail flame cutting cone through the ventilation holes. The gas then exits from the tip of the tail flame cutting cone, preventing plasma heat from entering the interior of the tail flame cutting cone and better protecting the internal optical components. Furthermore, a ring of cooling water channels is provided around the outer circumference of the cold cone mounting cavity. The heat sink has channel inlets and outlets corresponding to the cooling water channels, allowing the cooling water channels to direct plasma onto the tail flame. The heat from the cutting cone is effectively dissipated, while the air-cooling channel serves as the cooling gas channel for the gas entering the cone. The main function of the viewing window is to block the gas annular cavity, creating a unidirectional gas path for the cooling gas. When the cooling gas enters the tail flame cutting cone, it can only exit from the tip. The viewing window uses a high-transmittance lens, ensuring the output of the light source. This dual cooling method of cold cone and gas not only better eliminates the tail flame but also significantly improves heat dissipation. Air cooling and backflushing prevent samples from entering the cold cone, reducing contamination at the cone opening. Attached Figure Description

[0007] Figure 1 This is a perspective view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 for Figure 2 A schematic diagram of the AA cross-section structure; Figure 5 for Figure 3 Schematic diagram of the BB cross-section; Figure 6 This is a perspective view of the tail flame cutting cone of the present invention in an inverted state; Figure 7 This is a cross-sectional view of the tail flame cutting cone of the present invention; The names corresponding to the serial numbers in the diagram are as follows: Heat sink 10, tail flame cutting cone 20, viewing window 30, cold cone mounting cavity 40, sealing ring stop 41, connecting ring wall 42, conductive ring wall 43, connecting hole wall 44, viewing window mounting stop 45, connecting hole 46, heat dissipation water channel 50, channel inlet 51, channel outlet 52, air intake channel 60, air intake inlet 61, cutting cone part 70, outer peripheral stop cover 71, cutting groove 711, cutting cone protrusion part 72, cone hole 721, connecting heat sink part 80, vent hole 801, inner cavity 802, connecting groove 803, connecting ring 81, lower convex pressure ring 82, airflow ring cavity 90, first sealing ring 100, second sealing ring 110, stop plug 120. Detailed Implementation

[0008] The cold cone structure with dual cooling methods is shown below. Figures 1-7 It includes a heat sink 10, a tail flame cutting cone 20, and a viewing window 30; The central area of ​​the heat sink 10 is recessed to form a cold cone mounting cavity 40. The heat sink 10 is provided with a ring-shaped heat dissipation water channel 50 corresponding to the outer periphery of the cold cone mounting cavity 40. The heat sink 10 is provided with a channel inlet 51 and a channel outlet 52 corresponding to the heat dissipation water channel 50. The heat sink 10 is also provided with an air intake channel 60 in the thickness direction. The tail flame cutting cone 20 includes a cutting cone part 70 and a connecting heat sink part 80. The upper outer ring of the connecting heat sink part 80 is provided with a number of vent holes 801, which are connected to the inner cavity 802 of the connecting heat sink part 80. The heat sink portion 80 of the tail flame cutting cone 20 is embedded in the cold cone mounting cavity 40, and the cutting cone portion 70 protrudes outward from the corresponding surface of the heat sink 10. The lower end of the heat sink portion 80 is sealed by the viewing window 30 to cover another opening area of ​​the cold cone mounting cavity 40. The lower outer part of the heat sink portion 80 and the inner wall of the cold cone mounting cavity 40 are combined to form an airflow annular cavity 90. The airflow annular cavity 90 is connected to the air intake channel 60 and several vent holes 801 respectively.

[0009] In a specific embodiment, The heat sink connection part 80 includes a connecting ring 81 and a lower convex pressure ring 82. The lower convex pressure ring 82 is provided at the bottom of the connecting ring 81. Three equally spaced vent holes 801 are arranged around the outer periphery of the connecting ring 81. The inner diameter of the lower convex pressure ring 82 is larger than the inner diameter of the connecting ring 81, and the outer diameter of the lower convex pressure ring 82 is smaller than the outer diameter of the connecting ring 81. The viewing window 30 is embedded in the annular cavity of the lower convex pressure ring 82. The cold cone mounting cavity 40 is provided with a sealing ring stop 41, a connecting ring wall 42, a conducting ring wall 43, and a connecting hole wall 44 in sequence from top to bottom. The sealing ring stop 41 is fitted with a first sealing ring 100. The connecting ring wall is provided with an internal thread for threaded connection of the external thread of the connecting ring 81. The diameter of the hole in the conducting ring wall 43 is larger than that in the connecting ring wall 42 for forming an airflow annular cavity 90. A viewing window mounting stop 45 is provided between the conducting ring wall 43 and the connecting hole wall 44. The connecting hole wall 44 contains a connecting hole 46. The bottom lower surface of the viewing window 30 is provided with a second sealing ring 110. The lower surface of the second sealing ring 110 is closely attached to the viewing window mounting stop 45, which prevents the cooling gas in the airflow annular cavity 90 from flowing out of the connecting hole 46. This ensures that the airflow annular cavity 90 is only used to connect the air intake channel 60 and the three vent holes 801. The evenly spaced vent holes 801 make the cold air enter the inner cavity 802 evenly, thereby making the airflow blow evenly toward the cone hole 721 of the tail flame cutting cone 20. Each set of vent holes 801 is also provided with a connecting groove 803 on the outer wall. The connecting groove 803 extends along the thickness direction of the connecting ring 81 and connects the gas in the airflow ring cavity 90 to the vent hole 801. The cutting cone portion 70 includes an outer peripheral stop cover 71 and a cutting cone protrusion 72. The center of the cutting cone protrusion 72 is provided with a cone hole 721. The lower surface of the outer peripheral stop cover 71 is arranged in close contact with the upper surface of the heat sink 10 to form a sufficient thermal contact area and ensure that the liquid cooling heat dissipation is sufficient and reliable. In a specific implementation, the outer peripheral stop cover 71 is also provided with evenly distributed cutting grooves 711 along the circumference. The cutting grooves 711 allow the tail flame cutting cone 20 to have space for thermal expansion deformation.

[0010] In a specific embodiment, the heat sink 10 is a cubic structure with a certain rectangular cross-section. The heat dissipation water channel 50 is obtained by assembling a concave blind hole in the thickness direction of the heat sink 10. The two ends of one adjacent side of the heat dissipation water channel 50 are respectively provided with a channel inlet 51 and a channel outlet 52. The other inlet ends of the concave blind hole are blocked by a stop plug 120. The water channels between the channel inlet 51 and the channel outlet 52 are not connected, thereby making the entire heat dissipation water channel form a unidirectional circulating flow structure to ensure reliable water cooling. An air inlet 61 is provided in the area between the channel inlet 51 and the channel outlet 52. The outer end of the air intake channel 60 is connected to the air inlet 61, and the inner end of the air intake channel 60 is connected to the airflow annular cavity 90.

[0011] Its working principle is as follows: The tail flame cutting cone is fixed on the cold cone mounting cavity of the heat sink. Ventilation holes are set around the circumference of the tail flame cutting cone, connecting to its inner cavity. Cooling gas introduced through the inlet channel enters the airflow annular cavity and then enters the various vents into the inner cavity of the tail flame cutting cone. It then exits from the tip of the tail flame cutting cone, preventing plasma heat from entering the interior of the tail flame cutting cone and better protecting the internal optical components. Furthermore, a ring of cooling water channels is set around the outer circumference of the cold cone mounting cavity. The heat sink has inlet and outlet channels corresponding to these channels. The cooling water channels direct the plasma onto the tail flame cutting cone. The heat from the cutting cone is better dissipated, and the air-cooling channel is the cooling gas channel that enters the cone. The main function of the viewing window is to block the gas annular cavity, thus forming a one-way gas path for the cooling gas. When the cooling gas enters the tail flame cutting cone, it can only be output from the tip of the tail flame cutting cone. The viewing window uses a high-transmittance lens, which also ensures the output of the light source. It adopts a dual cooling method of cold cone and gas, which can not only better eliminate the tail flame, but also greatly improve the heat dissipation effect. Through air cooling and backflushing, it prevents the sample from entering the interior of the cold cone and reduces the contamination of the cone opening.

[0012] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0013] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 cold finger structure of a dual refrigeration type, characterized by, It comprises: a heat sink, a central region of the heat sink is concave to form a cold cone mounting cavity, the heat sink is provided with a ring cloth heat dissipation waterway corresponding to the outer periphery of the cold cone mounting cavity, the heat sink is provided with a passage inlet and a passage outlet corresponding to the heat dissipation waterway, and the heat sink is further provided with an air inlet channel in the thickness direction; a tail flame cutting cone, which comprises a cutting cone part and a connecting heat sink part, a plurality of air holes are arranged on the outer periphery of the upper part of the connecting heat sink part, and the air holes are communicated with the inner cavity of the connecting heat sink part; and a perspective window; The connecting heat sink part of the tail flame cutting cone is embedded in the cold cone mounting cavity, and the cutting cone part protrudes outward from the corresponding surface of the heat sink, the lower end of the connecting heat sink part encapsulates the other opening surface area of the cold cone mounting cavity through the perspective window, the lower outer part of the connecting heat sink part and the inner wall of the cold cone mounting cavity combine to form an air flow ring cavity, and the air flow ring cavity is respectively communicated with the air inlet channel and the plurality of air holes.

2. The dual refrigeration cryogenic cone structure of claim 1, wherein: The connecting heat sink part comprises a connecting ring and a lower convex compression ring, the bottom of the connecting ring is provided with the lower convex compression ring, a plurality of air holes are arranged on the outer periphery of the connecting ring, the inner diameter of the lower convex compression ring is greater than that of the connecting ring, the outer diameter of the lower convex compression ring is smaller than that of the connecting ring, and the perspective window is embedded in the ring cavity of the lower convex compression ring.

3. The dual refrigeration cryogenic cone structure of claim 2, wherein: The cold cone mounting cavity is sequentially provided with a sealing ring stopper, a connecting ring wall, a guide ring wall and a communication hole wall from top to bottom, the first sealing ring is embedded in the sealing ring stopper, the connecting ring wall is used for connecting the connecting ring, the guide ring wall is used for forming the air flow ring cavity, the guide ring wall and the communication hole wall are provided with a perspective window mounting stopper therebetween, and the communication hole wall is a communication hole.

4. The dual refrigeration cryogenic cone structure of claim 3, wherein: The bottom lower surface of the perspective window is provided with a second sealing ring, the lower surface of the second sealing ring closely abuts against the perspective window mounting stopper, so that the cooling gas in the air flow ring cavity cannot flow out of the communication hole.

5. The dual refrigeration cryogenic cone structure of claim 3, wherein: The outer wall corresponding to each group of air holes is further provided with a communication groove, the communication groove is arranged in the thickness direction of the connecting ring, and the communication groove communicates the gas in the air flow ring cavity to the air holes.

6. The dual refrigeration cryogenic cone structure of claim 3, wherein: The connecting ring and the connecting ring wall are connected through threads.

7. The dual refrigeration cryogenic cone structure of claim 1, wherein: The cutting cone part comprises an outer peripheral stop cover and a cutting cone convex part, the center of the cutting cone convex part is provided with an air hole, and the lower surface of the outer peripheral stop cover is arranged to closely abut against the upper surface of the heat sink to form a sufficient heat conduction contact area.

8. The dual refrigeration cryogenic cone structure of claim 1, wherein: The heat dissipation waterway is assembled by arranging an inner concave blind hole in the thickness direction of the heat sink, two ends of one adjacent side of the heat dissipation waterway are respectively provided with a passage inlet and a passage outlet, and the waterway between the passage inlet and the passage outlet is not communicated.

9. The dual refrigeration cryogenic cone structure of claim 8, wherein: The region between the passage inlet and the passage outlet is provided with an air inlet, the outer end of the air inlet channel is connected to the air inlet, and the inner end of the air inlet channel is communicated to the air flow ring cavity.

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