Freezing device, freezing method and cryosurgical instrument

Abstract

The invention discloses a freezing device, a freezing method and a cryosurgical instrument, the freezing device comprises a freezing head, an evaporation part and a liquid storage assembly, the evaporation part is connected with the freezing head, a containing groove for containing freezing liquid is formed in the evaporation part, and the freezing liquid in the containing groove volatilizes to reduce the temperature of the evaporation part and the freezing head; the freezing head is provided with a capillary tube, and the capillary tube is communicated with the containing groove, so that part of the freezing liquid in the containing groove is conveyed to the freezing head through the capillary tube, the freezing liquid conveyed to the freezing head volatilizes and absorbs heat, and the temperature of the freezing head is further reduced. The freezing head can still stably maintain the expected temperature requirement when the surrounding environment has the high temperature, the operation difficulty is lowered, and time and energy are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical surgical instruments, and in particular to a freezing device, a freezing method and a cryosurgical instrument. Background Art

[0002] In some work that requires local low temperature treatment of a certain interface, such as the frostbite operation within a 1mm diameter range of an animal's skull, it is necessary to ensure the normal body temperature of the animal as a whole, and to stably maintain a temperature of minus 100°C in a small area at a designated position on the skull to cause local frostbite. Therefore, a freezing device is needed.

[0003] In the prior art, a 1mm diameter copper rod is usually immersed in liquid nitrogen for a period of time to make the copper rod reach minus 100°C, and then the copper rod is taken out and transferred to the surface of the animal skull in a room temperature environment and stays there for 2 seconds to create a local brain frostbite model. Since the surface temperature of the copper rod has been rising after the copper rod is taken out of liquid nitrogen and placed in a room temperature environment, it is actually measured that the time from the time the 1mm diameter copper rod leaves the liquid nitrogen to minus 100°C is about 12 seconds, and the temperature thereafter is no longer below minus 100°C; and since the copper rod contacts the surface of the skull, it will obtain more heat energy, causing the copper rod to heat up rapidly, which may cause the skull surface to fail to reach minus 100°C. Due to the above obvious defects, during the freezing operation, the operator is often required to operate quickly, but rapid operation is prone to operating errors, resulting in poor local frostbite effects.

[0004] Therefore, the existing technology needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, an object of the present invention is to provide a freezing device, a freezing method and a cryosurgical instrument to solve the technical problem that the existing freezing head cannot maintain a low temperature for a long time.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows:

[0007] A freezing device, comprising: a freezing head, wherein the freezing head is provided with a capillary tube;

[0008] An evaporating element connected to the freezing head, wherein the evaporating element is provided with a receiving tank for containing the freezing liquid, and the capillary is connected to the receiving tank for conveying the freezing liquid in the receiving tank to the freezing head;

[0009] A liquid storage component is provided with a storage cavity for containing refrigerant liquid inside the liquid storage component, and the storage cavity is communicated with the containing tank and is used to provide refrigerant liquid to the containing tank.

[0010] Optionally, a plurality of capillaries are provided, one end of each capillary is communicated with the containing groove, and the other end of each capillary extends to an end of the freezing head away from the evaporating element.

[0011] Optionally, the evaporator is cylindrical, the receiving groove is arranged on the upper end surface of the evaporator, and the receiving groove is a cylindrical groove with an upper opening; a connecting port connected to the receiving groove is provided on the side wall of the evaporator, the capillary is connected to the receiving groove through the connecting port, and the liquid storage assembly is connected to the receiving groove through the upper opening of the receiving groove.

[0012] Optionally, the refrigeration device further comprises a positioning member, and the positioning member is connected to the evaporating member.

[0013] Optionally, the liquid storage assembly includes a freezing liquid guide tube, a freezing liquid storage bottle and a flow control device, the freezing liquid storage bottle is provided with the storage cavity, one end of the freezing liquid guide tube is connected to the storage cavity, and the other end is connected to the liquid inlet end of the flow control device, and the liquid outlet end of the flow control device is connected to the receiving tank.

[0014] Optionally, the cryogenic liquid guide tube includes a flexible cryogenic liquid guide tube.

[0015] Optionally, the freezing liquid storage bottle includes a thermal insulation inner bottle and a thermal insulation layer, and the thermal insulation layer is arranged on the outer surface of the thermal insulation inner bottle; and / or the freezing liquid guide tube includes a guide inner tube and a guide insulation layer, and the guide insulation layer is arranged on the outer surface of the guide inner tube.

[0016] Optionally, the freezing device further comprises a handle, and the handle is disposed on the liquid storage assembly.

[0017] A freezing method for a freezing device as described in any one of the above items, characterized in that it comprises the steps of:

[0018] Move the freezing head to the position to be frozen and fix it;

[0019] The refrigerant in the liquid storage assembly is transported to the evaporator until the liquid level of the refrigerant in the evaporator submerges the connection port between the capillary tube and the containing tank.

[0020] A cryosurgical instrument, wherein the cryosurgical instrument comprises the freezing device as described in any one of the above items.

[0021] In summary, the beneficial effects of the present invention are:

[0022] The freezing device of the present invention comprises a freezing head, an evaporating element and a liquid storage component, wherein the evaporating element is connected to the freezing head, and the evaporating element is provided with a receiving tank for accommodating a freezing liquid, and the freezing liquid in the receiving tank evaporates to reduce the temperature of the evaporating element and the freezing head; a capillary is provided on the freezing head, and the capillary is connected to the receiving tank, so that part of the freezing liquid in the receiving tank is transported to the freezing head through the capillary, and the freezing liquid transported to the freezing head evaporates and absorbs heat, further reducing the temperature of the freezing head, so that the freezing head can stably maintain the expected temperature requirements when the surrounding environment has a high temperature, reducing the difficulty of operation, and saving time and energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the refrigeration device of the present invention;

[0025] Figure 2 is a cross-sectional view of a refrigeration device of the present invention;

[0026] Figure 3 is a cross-sectional view of a freezing head in the present invention;

[0027] Figure 4 Flow chart of the freezing method of the present invention.

[0028] Among them: 100, freezing head; 110, capillary; 200, evaporation part; 400, liquid storage component; 410, freezing liquid guide tube; 411, guide inner tube; 412, guide insulation layer; 420, freezing liquid storage bottle; 421, insulation inner bottle; 422, insulation layer; 430, flow control device; 431, liquid introduction nozzle; 432, flow control switch; 500, handle; 600, positioning part. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.

[0030] See also Figure 1 and Figure 3 In one embodiment of the present invention, a freezing device is disclosed, including a freezing head 100, an evaporating element 200 and a liquid storage assembly 400, wherein a capillary 110 is provided on the freezing head 100; the evaporating element 200 is connected to the freezing head 100, and a receiving tank for placing a freezing liquid is provided on the evaporating element 200; the capillary 110 is provided on the freezing head 100, and one end of the capillary 110 is communicated with the receiving tank, and is used to transport part of the freezing liquid in the receiving tank to the freezing head 100; the liquid storage assembly 400 is provided with a storage cavity for accommodating freezing liquid inside, and the storage cavity is communicated with the receiving tank, and is used to provide freezing liquid to the receiving tank.

[0031] The coolant in this embodiment is liquid nitrogen, which has a boiling point of -196°C and can be rapidly vaporized under normal pressure. The liquid nitrogen absorbs a large amount of heat during the vaporization process, thereby reducing the surrounding temperature.

[0032] Specifically, liquid nitrogen is stored in the liquid storage assembly 400. When the freezing head 100 needs to maintain a low temperature, the operator tilts the liquid storage assembly 400 so that the liquid nitrogen in the liquid storage assembly 400 enters the receiving tank on the evaporation member 200. The liquid nitrogen in the receiving tank quickly vaporizes, and absorbs a large amount of heat during the vaporization process, thereby reducing the temperature of the evaporation member 200. Since the freezing head 100 is connected to the evaporation member 200, the temperature of the freezing head 100 is also reduced. It should be emphasized that since the capillary 110 is provided on the freezing head 100, and the inlet of the capillary 110 is connected to the receiving tank, when the liquid nitrogen in the liquid storage assembly 400 enters the receiving tank, the capillary 110 contacts the liquid nitrogen. According to the principle of capillary phenomenon, the capillary 110 transports the liquid nitrogen in the receiving tank to the freezing head 100, and the liquid nitrogen transported to the freezing head 100 vaporizes and absorbs heat, further reducing the temperature of the freezing head 100.

[0033] The principle of capillary phenomenon in this embodiment means that the surface of the liquid is similar to a stretched rubber film. If the liquid surface is curved, it tends to flatten. Therefore, the concave liquid surface exerts a pulling force on the liquid below, and the convex liquid surface exerts a pressure on the liquid below. The capillary phenomenon is caused by surface tension. The liquid surface of the wetting liquid in the capillary 110 is concave, which exerts a pulling force on the liquid below, causing the liquid to rise along the tube wall. When the upward pulling force is equal to the gravity of the liquid column in the tube, the liquid in the tube stops rising and reaches equilibrium. For example, water rises in a thin glass tube because it can wet glass.

[0034] In this embodiment, the evaporator 200 is provided to reduce the temperature of the freezing head 100 by utilizing the principle of liquid nitrogen vaporization and heat absorption. The capillary 110 is provided to transport the liquid nitrogen to the freezing head 100 for vaporization and heat absorption by utilizing the capillary principle, thereby further reducing the temperature of the freezing head 100 and extending the time for the freezing head 100 to maintain a low temperature, thereby reducing the difficulty of the freezing operation and saving time and energy, so that the freezing head 100 can still stably maintain the expected temperature requirements when the surrounding temperature is relatively high.

[0035] See also Figure 2 A plurality of capillaries 110 are provided, one end of the capillary tube 110 is communicated with the receiving groove, and the other end of the capillary tube 110 extends to an end of the freezing head 100 away from the evaporating element 200 .

[0036] In this embodiment, the capillary tube 110 may be provided with one or more capillaries, and the number of the capillaries 110 may be determined according to the amount of freezing liquid to be transported. There are many ways to arrange the capillary tube 110 on the freezing head 100, such as opening one or more channels at intervals in the freezing head 100, and then arranging the capillaries 110 in the channels respectively; or directly opening fine holes in the freezing head 100, and the fine holes are the capillaries 110 described in this embodiment.

[0037] During the freezing operation, the operator places the freezing head 100 in liquid nitrogen for cooling. When the temperature of the freezing head 100 reaches the required temperature, the freezing head 100 is taken out and transferred to the surface of the experimental object and stays there for a certain period of time to create a local frostbite model. During the freezing operation, the end of the freezing head 100 away from the evaporator 200 is the operating end.

[0038] When the liquid nitrogen on the evaporator 200 vaporizes and absorbs heat, the cooling effect of the operating end of the freezing head 100 is affected to a certain extent because the operating end of the freezing head 100 is far away from the evaporator 200. In addition, when the operating end of the freezing head 100 contacts the frozen object, the heat on the frozen object will be transferred to the operating end of the freezing head 100, causing the temperature of the operating end of the freezing head 100 to rise. In this embodiment, a small amount of liquid nitrogen in the containing tank is transported to the operating end of the freezing head 100 through the capillary action of the capillary tube 110. The liquid nitrogen transported to the operating end of the freezing head 100 vaporizes and absorbs heat, thereby reducing the temperature of the operating end of the freezing head 100, making the heat exchange and cooling of the freezing head 100 more sufficient.

[0039] In this embodiment, the evaporator 200 is cylindrical, and the receiving groove is arranged on the upper end surface of the evaporator 200, and the receiving groove is a cylindrical groove with an upper opening; a connecting port connected to the receiving groove is provided on the side wall of the evaporator 200, and the capillary 110 is connected to the receiving groove through the connecting port, and the liquid storage assembly 400 is connected to the receiving groove through the upper opening of the receiving groove.

[0040] Specifically, the end of the capillary 110 away from the operating end of the freezing head 100 is the liquid inlet end, and the liquid inlet end is connected to the connecting port. When the operator tilts the liquid storage component 400, the liquid nitrogen in the liquid storage component 400 enters the receiving tank from the upper opening of the receiving tank. When the liquid nitrogen in the receiving tank submerges the liquid inlet end of the capillary 110, the liquid nitrogen enters the capillary 110 through the liquid inlet end of the capillary 110.

[0041] In this embodiment, the evaporator 200 is set to be cylindrical, which can better utilize the space and reduce the volume of the evaporator 200; an opening is set above the receiving tank, which can release the pressure in the receiving tank on the one hand to avoid danger caused by excessive air pressure in the receiving tank; on the other hand, the opening is set above the receiving tank, and the operator can observe the amount of liquid nitrogen in the receiving tank through the opening above the receiving tank, which is convenient for operation.

[0042] In a feasible embodiment, the evaporating element 200 is further provided with a side opening communicating with the containing tank, and the liquid storage assembly 400 can be communicated with the containing tank through the side opening.

[0043] In this embodiment, the cross section of the freezing head 100 gradually decreases along a direction away from the evaporation element 200 .

[0044] In this embodiment, the cross section of one end of the freezing head 100 close to the evaporation element 200 is set larger, which ensures efficient heat transfer between the freezing head 100 and the evaporation element 200. However, the operating end of the freezing head 100 needs to contact the frozen object to cause local frostbite. In order to perform more delicate operations, the operating end of the freezing head 100 is usually set smaller to avoid frostbite on parts outside the target area. The cross section of the freezing head 100 in this embodiment gradually decreases in the direction away from the evaporation element 200, which can ensure that the operating end can be designed to be small enough as needed, and can also ensure that the freezing head 100 can fully exchange heat with the evaporation element 200.

[0045] In this embodiment, the freezing head 100 and the evaporating element 200 are integrally formed.

[0046] The one-piece molding structure refers to connecting multiple parts into a whole through a molding process. The one-piece molding structure can not only improve the strength and rigidity of the structure, but also reduce the number of connecting parts, thereby reducing thermal resistance and obstacles in the heat conduction process, improving heat dissipation efficiency, and extending the low temperature time of the freezing head 100.

[0047] In this embodiment, the freezing head 100 includes a pure copper freezing head 100 or a stainless steel freezing head 100 ; and / or the evaporation element 200 includes a pure copper evaporation element 200 or a stainless steel evaporation element 200 .

[0048] Specifically, pure copper and stainless steel both have high thermal conductivity, so in the cryostat 100 that requires efficient heat conduction, copper and stainless steel can quickly transfer heat. It should be emphasized that due to the metallic properties of pure copper, it is easier to process and can be conveniently made into cryostat 100 of various shapes and sizes. In addition, pure copper also has excellent antifreeze performance.

[0049] In this embodiment, the refrigeration device further includes a positioning member 600 , and the positioning member 600 is connected to the evaporation member 200 .

[0050] Specifically, one end of the positioning member 600 is fixedly connected to the evaporation member 200, and the other end extends in a direction away from the evaporation member 200, for being held by hand or connected to an external control device, and the flow control device 430 is connected to the positioning member 600. Since the freezing head 100 is connected to the evaporation member 200, and the evaporation member 200 is connected to the positioning member 600, the freezing head 100 can be driven to move by moving the positioning member 600, so that the freezing head 100 is positioned at a suitable position. By setting the positioning member 600, the freezing head 100 can be positioned flexibly and accurately.

[0051] In order to prevent the evaporator 200 from exchanging heat with the outside through the positioning member 600, which may cause the temperature of the positioning member 600 to be too low, the positioning member 600 is made of a material with slow heat conduction, such as plastic or other heat insulating materials.

[0052] In this embodiment, the liquid storage component 400 includes a freezing liquid guide tube 410, a freezing liquid storage bottle 420 and a flow control device 430. The freezing liquid storage bottle 420 is provided with the storage cavity. One end of the freezing liquid guide tube 410 is connected to the storage cavity, and the other end is connected to the liquid inlet end of the flow control device 430. The liquid outlet end of the flow control device 430 is connected to the containing tank.

[0053] See also Figure 2The flow control device 430 in this embodiment includes a liquid introduction nozzle 431 and a flow control switch 432. The liquid introduction nozzle 431 is fixedly connected to the positioning member 600, and one end of the liquid introduction nozzle 431 is connected to the freezing liquid guide pipe 410, and the other end is aligned with the upper opening of the containing tank. The flow control switch 432 is arranged on the liquid introduction nozzle 431 to control the flow of liquid nitrogen.

[0054] Specifically, when the operator tilts the cryogenic liquid storage bottle 420, the liquid nitrogen in the cryogenic liquid storage bottle 420 enters the liquid inlet nozzle 431 through the cryogenic liquid guide tube 410. By controlling the opening of the flow control switch 432, the flow rate of the liquid nitrogen entering the receiving tank can be adjusted. The liquid nitrogen flowing through the liquid inlet nozzle 431 enters the receiving tank from the upper opening of the receiving tank.

[0055] Since the inner diameter of the cryogenic liquid guide tube 410 is smaller than the inner diameter of the cryogenic liquid storage bottle 420 , the operator can conveniently control the flow rate of the liquid nitrogen, thereby better controlling the pouring speed and the pouring amount of the liquid nitrogen.

[0056] In this embodiment, the refrigerant liquid guide tube 410 comprises a flexible refrigerant liquid guide tube, which is made of a flexible material and can be bent, so that the operator can flexibly position the freezing head and is easy to use.

[0057] See also Figure 2 The refrigerant storage bottle 420 includes a thermal insulation inner bottle 421 and a thermal insulation layer 422, and the thermal insulation layer 422 is arranged on the outer surface of the thermal insulation inner bottle 421; and / or the refrigerant guide tube 410 includes a guide inner tube 411 and a guide insulation layer 412, and the guide insulation layer 412 is arranged on the outer surface of the guide inner tube 411.

[0058] Specifically, the heat-insulating inner bottle 421 includes a vacuum heat-insulating tube, which is composed of two layers of inner and outer containers. The storage cavity is provided inside the inner layer, and the space between the inner layer and the outer layer is evacuated to effectively reduce the loss of heat, thereby having a highly efficient heat-insulating effect. In this embodiment, a heat-insulating layer 422 is further provided outside the vacuum tube, which further improves the heat-insulating effect of the freezing liquid storage bottle 420. Correspondingly, the guide inner tube 411 also includes a vacuum heat-insulating tube, and a guide heat-insulating layer 412 is provided outside the vacuum heat-insulating tube, which improves the heat-insulating effect of the freezing liquid guide tube 410.

[0059] In this embodiment, the heat preservation inner bottle 421 and the guide inner tube 411 are integrally formed, and the heat preservation and heat insulation layer 422 and the guide heat insulation layer 412 are integrally formed. The heat preservation inner bottle 421 and the guide inner tube 411 are set as an integrally formed structure, which can not only improve the strength and rigidity of the structure, but also reduce the number of sealing parts, thereby reducing thermal resistance and obstacles in the heat conduction process, improving heat dissipation efficiency, and extending the low temperature time of the freezing head 100.

[0060] In this embodiment, the refrigerant liquid guiding pipe 410 is detachably connected to the evaporating element 200 .

[0061] During the manufacturing process of the freezing model, different freezing objects require different freezing areas, so it is necessary to replace freezing heads 100 of different sizes. The evaporator 200 and the freezing head 100 in this embodiment are an integrated structure. Therefore, when replacing the freezing head 100, the evaporator 200 and the freezing head 100 are removed from the freezing liquid guide tube 410 and replaced with freezing heads 100 and evaporator 200 of different models, making the use of the freezing device more convenient and having a wider range of applications.

[0062] In this embodiment, the freezing device further includes a handle 500 , and the handle 500 is disposed on the liquid storage assembly 400 .

[0063] Providing a handle 500 can improve the comfort and stability of the liquid storage component 400, and make it more convenient for operators during the freezing process. In order to prevent the liquid storage component 400 from exchanging heat with the outside through the handle 500, thereby causing the temperature of the handle 500 to be too low, the handle 500 is made of a material with slow heat conduction, such as a wooden stick or other insulating materials.

[0064] As another embodiment of the present application, please refer to Figure 4 , also discloses a freezing method for use in the freezing device as described above, comprising the steps of:

[0065] S100, moving the freezing head to the position to be frozen and fixing it.

[0066] S200, transporting the refrigerant in the liquid storage assembly to the evaporator until the liquid level of the refrigerant in the evaporator submerges the connection port between the capillary tube and the containing tank.

[0067] Specifically, before the step of moving the freezing head to the position to be frozen and fixing it, the method further includes: placing the freezing head in liquid nitrogen until the temperature of the freezing head reaches -100° C. and then taking out the freezing head.

[0068] The freezing position described in this embodiment is the attachment of the freezing object surface or directly contacting the freezing object. In this embodiment, the freezing device can be controlled by an external device or manually operated.

[0069] After the cryohead is taken out of the liquid nitrogen, the temperature of the cryohead gradually increases, and the temperature of the cryohead also increases when the cryohead contacts the frozen object. Therefore, in this embodiment, the cryohead is cooled by transporting the cryofluid in the liquid storage component to the evaporator, and the cryofluid in the evaporator vaporizes and absorbs heat. Moreover, when the liquid level of the cryofluid in the evaporator is above the connection port of the capillary tube and the receiving tank, the cryofluid in the receiving tank enters the cryohead through the connecting hole, and the cryofluid in the cryohead evaporates, further reducing the temperature of the cryohead, so that the cryohead can stably maintain the expected temperature requirement when the surrounding environment has a high temperature, thereby reducing the difficulty of operation and saving time and energy.

[0070] As another embodiment of the present application, a cryosurgical instrument is also disclosed, wherein the cryosurgical instrument is provided with any of the above-mentioned freezing devices, and the freezing device is used to stably maintain a temperature of -100°C in a small area of ​​the target position to cause local frostbite.

[0071] In summary, the freezing device of this embodiment includes a freezing head 100, an evaporating element 200 and a liquid storage assembly 400, the evaporating element 200 is connected to the freezing head 100, and the evaporating element 200 is provided with a receiving tank for accommodating refrigerant, and the refrigerant in the receiving tank evaporates to reduce the temperature of the evaporating element 200 and the freezing head 100; the freezing head 100 is provided with a capillary 110, and the capillary 110 is connected to the receiving tank, so that part of the refrigerant in the receiving tank is transported to the freezing head 100 through the capillary 110 to evaporate and absorb heat, thereby further reducing the temperature of the freezing head 100, so that the freezing head 100 can still stably maintain the expected temperature requirements when the surrounding environment has a high temperature, reduce the difficulty of operation, and save time and energy.

[0072] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0073] It should be noted that the present invention uses a freezing device, a freezing method and a cryosurgical instrument as examples to introduce the specific structure and working principle of the present invention, but the application of this embodiment is not limited to a freezing device, a freezing method and a cryosurgical instrument, and can also be applied to the production and use of other similar workpieces.

[0074] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigeration device, characterized in that: include: A freezing head, wherein a capillary is provided on the freezing head; An evaporating element connected to the freezing head, wherein the evaporating element is provided with a receiving tank for containing the freezing liquid, and the capillary is connected to the receiving tank for conveying the freezing liquid in the receiving tank to the freezing head; A liquid storage component is provided with a storage cavity for containing refrigerant liquid inside the liquid storage component, and the storage cavity is communicated with the containing tank and is used to provide refrigerant liquid to the containing tank.

2. The refrigeration device according to claim 1, characterized in that: A plurality of capillaries are provided, one end of each capillary is communicated with the containing groove, and the other end of each capillary extends to an end of the freezing head away from the evaporating element.

3. The refrigeration device according to claim 1, characterized in that: The evaporator is cylindrical in shape, and the receiving groove is arranged on the upper end surface of the evaporator, and the receiving groove is a cylindrical groove with an upper opening; a connecting port connected to the receiving groove is provided on the side wall of the evaporator, and the capillary is connected to the receiving groove through the connecting port, and the liquid storage assembly is connected to the receiving groove through the upper opening of the receiving groove.

4. The refrigeration device according to claim 1, characterized in that: The freezing device further comprises a positioning member connected to the evaporating member.

5. The refrigeration device according to claim 1, characterized in that: The liquid storage assembly includes a freezing liquid guide tube, a freezing liquid storage bottle and a flow control device. The freezing liquid storage bottle is provided with the storage cavity. One end of the freezing liquid guide tube is connected to the storage cavity, and the other end is connected to the liquid inlet end of the flow control device. The liquid outlet end of the flow control device is connected to the containing tank.

6. The refrigeration device according to claim 5, characterized in that The refrigerant liquid guide tube comprises a flexible refrigerant liquid guide tube.

7. The refrigeration device according to claim 5, characterized in that The refrigerant storage bottle includes a thermal insulation inner bottle and a thermal insulation layer, and the thermal insulation layer is arranged on the outer surface of the thermal insulation inner bottle; and / or the refrigerant guide tube includes a guide inner tube and a guide insulation layer, and the guide insulation layer is arranged on the outer surface of the guide inner tube.

8. The refrigeration device according to claim 1, characterized in that: The freezing device also includes a handle, which is arranged on the liquid storage assembly.

9. A freezing method for a freezing device according to any one of claims 1 to 8, characterized in that: Includes steps: Move the freezing head to the position to be frozen and fix it; The refrigerant in the liquid storage assembly is transported to the evaporator until the liquid level of the refrigerant in the evaporator submerges the connection port between the capillary tube and the containing tank.

10. A cryosurgical instrument, characterized in that: Comprising a freezing device as claimed in any one of claims 1 to 8.

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