CN210138184U - Refrigerating equipment - Google Patents

Abstract

The utility model discloses a refrigeration plant belongs to refrigeration plant technical field, including medium storage jar, medium supply pipeline, medium recovery pipeline, cold volume generating device, first cold volume exchange device and the cold volume exchange device of second. The utility model provides a refrigeration plant can improve the utilization efficiency to cold volume, still has the accurate advantage of rewarming process control simultaneously.

Description

Refrigerating equipment

The application requires the priority of the application of the Chinese utility model patent submitted in 2018, 7, and 23, and the application number is 201821165980.0.

Technical Field

The utility model relates to a refrigeration technology field, concretely relates to refrigeration plant.

Background

Refrigeration equipment is widely applied to various fields, such as air conditioners, refrigerators, cold chain logistics, medical equipment and the like, and generally comprises a refrigeration generating device such as a compressor and the like, and is matched with a set of cold-carrying medium circulating system to conduct refrigeration to a cooled object. With the development of the technology, the high requirements on the parameters of refrigeration equipment such as the cold utilization rate, silence, volume and the like are provided in many fields.

For example, a cryoablation device exists in the field of medical instruments, and a cryoablation apparatus generally includes a main machine and a cryoballoon, wherein the cryoballoon of the main machine provides a cold-carrying medium, the cryoballoon is mounted at the front end of a catheter and extends into a human body when in use, and the main machine leads the cold-carrying medium into the cryoballoon from the catheter to cool the cryoballoon, so as to perform cryoablation on a target tissue.

Because the requirement of the cryoablation on the temperature of a cold head is generally about minus 60 ℃, and the cryoablation can be smoothly carried out only when the cold carrying temperature at least reaches minus 100 ℃ in consideration of the cold loss in the process, the refrigeration equipment in the prior art is difficult to enable the cold carrying medium to reach the temperature. If the mode of increasing the power of the refrigerating machine is adopted, the limited space in the operating room is limited, and the requirement of a silent environment in the operating room is difficult to meet. Therefore, the refrigeration equipment in the prior art has low utilization rate of cold energy, so that the refrigeration equipment is difficult to meet the requirements of cold energy using elements such as a freezing balloon and the like, and the low temperature required by the cold energy using elements is difficult to reach.

Disclosure of Invention

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the refrigeration plant among the prior art and can't reach cold volume to the low utilization ratio of cold volume and use the required microthermal defect of component, and then provide a refrigeration plant that is higher to the utilization ratio of cold volume.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

a refrigeration appliance comprising:

a medium storage tank in which a cold medium is stored;

one end of the medium supply pipeline is communicated with the medium storage tank, and the other end of the medium supply pipeline is communicated with the liquid inlet end of the cold energy using element;

one end of the medium recovery pipeline is communicated with the medium storage tank, and the other end of the medium recovery pipeline is communicated with the liquid outlet end of the cold energy using element;

the cold generating device is used for providing cold;

the first cold energy exchange device is arranged on the medium supply pipeline, the cold energy generating device provides cold energy for the first cold energy exchange device, and the first cold energy exchange device is used for carrying out refrigeration heat exchange on cold-carrying media passing through the first cold energy exchange device;

further comprising:

the second cold exchange device is provided with a hot fluid channel arranged on the medium supply pipeline and a cold fluid channel arranged on the medium recovery pipeline, cold exchange is generated between the cold fluid channel and the hot fluid channel, and cold-carrying media flowing through the hot fluid channel are precooled;

the hot fluid channel is connected between the medium storage tank and the first cold exchanging device.

As a preferred technical solution, the method further comprises:

the bypass pipe is communicated with the medium supply pipeline and the medium recovery pipeline, and enables the medium supply pipeline and the medium recovery pipeline to form a precooling loop which is connected with the medium storage tank and the first cold energy exchange device in series;

and the bypass pipe is communicated with the medium supply pipeline through a first three-way valve.

As a preferred technical solution, the method further comprises:

and the cold accumulation device is arranged on the medium recovery pipeline, is communicated with the first cold exchange device by utilizing the bypass pipe and is suitable for storing the cold flowing out of the first cold exchange device.

As a preferred technical solution, the method further comprises:

the heat insulation device is provided with a heat insulation cavity suitable for reducing or isolating heat conduction with the outside, and the cold output ends of the first cold energy exchange device, the second cold energy exchange device, the cold accumulation device and the cold generation device are positioned in the heat insulation cavity.

As a preferable technical scheme, the heat insulation device is a box body, and a vacuumizing device communicated with the heat insulation cavity is installed on the heat insulation device.

In a preferred embodiment, the heat insulation device is a box, and the heat insulation cavity is filled with a heat insulation material.

As a preferable technical scheme, the cold energy storage device further comprises a rewarming loop, wherein the rewarming loop is used for conveying the cold carrying medium in the medium storage tank to a liquid inlet end of the cold energy using element.

As a preferred technical solution, the rewarming circuit includes:

a rewarming tube;

and the medium inlet end of the rewarming pipe is connected with one side which is installed on the medium supply pipeline and does not enter the first cold energy exchange device by using a second three-way valve.

As a preferable technical solution, the cold storage system further comprises a rewarming loop, wherein the rewarming loop is used for heating the cold carrying medium in the storage tank and then conveying the heated cold carrying medium to the liquid inlet end of the cold using element.

As a preferred technical solution, the rewarming circuit includes:

the reheating device is connected in series with the reheating pipe;

and the liquid inlet end of the rewarming pipe is connected with the upstream of the liquid inlet of the hot fluid channel by a second three-way valve.

As a preferred technical solution, the rewarming circuit further includes:

and the rewarming return pipeline is used for communicating the liquid outlet end of the cold energy using element with the liquid return port of the medium storage tank.

As a preferred technical solution, the rewarming return line includes:

two ends of the rewarming return pipe are communicated with the medium recovery pipeline and are connected with the second cold energy exchange device in parallel;

and the liquid inlet end of the rewarming return pipe is connected with the medium supply pipeline by a third three-way valve.

As a preferred technical solution, the method further comprises:

the heat insulation device is provided with a heat insulation cavity suitable for reducing or isolating heat conduction with the outside, and the cold output ends of the first cold energy exchange device, the second cold energy exchange device, the cold accumulation device and the cold generation device are positioned in the heat insulation cavity;

the rewarming return pipe is arranged outside the heat insulation device.

As a preferable technical solution, a pumping device is connected in series to the medium supply pipeline or the medium recovery pipeline, and the pumping device is adapted to provide power for the flow of the cooling medium.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an among the refrigeration plant, including medium storage jar, medium supply pipeline, medium recovery pipeline, cold volume generating device, first cold volume exchange device and the cold volume exchange device of second. The medium storage tank stores loaded cold medium; one end of the medium supply pipeline is communicated with the medium storage tank, and the other end of the medium supply pipeline is suitable for being communicated with the liquid inlet end of the cold energy using element; one end of the medium recovery pipeline is communicated with the medium storage tank, and the other end of the medium recovery pipeline is suitable for being communicated with the liquid outlet end of the cold energy using element; the cold generating device is used for providing cold; the first cold energy exchange device is arranged on a medium supply pipeline, the cold energy generating device provides cold energy for the first cold energy exchange device, and the first cold energy exchange device is used for carrying out refrigeration heat exchange on cold-carrying media passing through the first cold energy exchange device; the second cold exchange device is provided with a hot fluid channel arranged on the medium supply pipeline and a cold fluid channel arranged on the medium recovery pipeline, cold exchange is generated between the cold fluid channel and the hot fluid channel, and cold-carrying media flowing through the hot fluid channel are precooled; the hot fluid channel is connected between the medium storage tank and the first cold exchanging device.

When the refrigeration equipment is used for refrigeration, the medium supply pipeline, the medium recovery pipeline and the liquid inlet of the cold energy using element are utilized, and the cold-carrying medium circularly flows, in the flowing process, the cold energy generated at the cold energy generating device is conveyed to the medium supply pipeline through the first cold energy exchanging device and then conveyed to the cold energy using element, the cold energy is released and then flows back to the medium recovery pipeline, partial cold energy still remains in the cold-carrying medium at the moment, and then when the cold-carrying medium flows through the medium recovery pipeline, due to the existence of the second cold energy exchanging device, the cold energy remaining in the cold-carrying medium can be transmitted to the cold-carrying medium in the medium supply pipeline through the second cold energy exchanging device, so that the cold-carrying medium at the position is cooled in advance.

In the process, the second cold energy exchanging device is arranged at the upstream position on the medium supply pipeline relative to the first cold energy exchanging device, and the temperature of the cold carrying medium in the medium supply pipeline is higher than that in the medium recovery pipeline, so that the conduction of cold energy from the medium recovery pipeline to the medium supply pipeline can be ensured. Through the process, the residual cold quantity of the cold carrying medium in the medium recovery pipeline can pre-cool the cold carrying medium, the initial temperature of the cold carrying medium entering the first cold quantity exchanging device is reduced, and then under the condition of the same cold quantity exchanging quantity, the pre-cooled cold carrying medium can reach a lower temperature, the utilization efficiency of the cold quantity is improved, and the low-temperature requirement of the cold quantity using element is met.

2. The utility model provides a refrigeration plant, also include the bypass pipe, the bypass pipe is linked together with medium supply pipeline and medium recovery pipeline, and make medium supply pipeline and medium recovery pipeline form the precooling return circuit of series medium storage jar and first cold volume exchange device; and the bypass pipe is communicated with the medium supply pipeline through a first three-way valve. The bypass pipe is utilized to pre-cool the secondary refrigerant before the secondary refrigerant is introduced into the cold energy using element, and in the pre-cooling stage, the secondary refrigerant flows through the medium supply pipeline, the first cold energy exchanging device, the bypass pipe and the medium recycling pipeline in sequence after coming out of the medium storage tank, and finally returns to the medium storage tank. The temperature of the cold carrying medium after precooling is reduced, the cold carrying medium has lower initial temperature when in a cold using element, and the low temperature required by the cold using device can be more easily reached after the cold carrying medium is cooled by the first cold exchanging device. Therefore, the utilization efficiency of the refrigeration equipment to the cooling capacity can be further improved.

3. The utility model provides an among the refrigeration plant, still include the cold-storage device, install on the medium recovery pipeline, utilize bypass pipe and first cold volume exchange device to be linked together, be suitable for the cold volume of outflow among the first cold volume exchange device of storage. In the precooling stage, the cold accumulation device can store part of cold energy brought by cold carrying media, the stored cold energy can carry out precooling on the cold carrying media flowing out of the cold energy using element, so that the temperature difference between a cold fluid channel and a hot fluid channel at the second cold energy exchange device is increased, the cold energy exchange rate at the second cold energy exchange device is increased, the temperature of the cold carrying media in the media supply pipeline is further reduced, and the cold carrying media which are cooled in advance can reach lower temperature after being finally cooled by the first cold energy exchange device. Therefore, the lowest temperature which can be reached by the refrigeration equipment can be further reduced, the utilization efficiency of the cold quantity can be further improved, and the waste of the cold quantity is reduced.

4. The utility model provides an among the refrigeration plant, still include heat-proof device, heat-proof device has the heat-proof chamber that is suitable for to reduce or completely cut off with outside heat conduction, first cold volume exchange device, second cold volume exchange device, cold-storage device and cold volume generating device's cold volume output is located heat-proof intracavity. The heat insulation device is utilized, the loss of cold energy generated in the cold energy exchange process can be avoided, the heat preservation effect of the cold accumulation device is better, and the loss of the cold energy generated in the cold accumulation device in the cold energy storage process is avoided.

5. The utility model provides an among the refrigeration plant, heat-proof device is the box, heat-proof device is last to be installed with the evacuating device of thermal-insulated chamber intercommunication. The heat insulation cavity close to the vacuum state can further reduce the loss rate of the cold quantity, so that the refrigeration equipment further improves the utilization efficiency of the cold quantity.

6. The utility model provides an among the refrigeration plant, still include the rewarming return circuit, the rewarming return circuit be used for with carry the feed liquor end that uses the component to cold volume after the cold-carrying medium heating in the storage jar. In some cases, the cold energy use element requires warming, for example in cryoablation, the target tissue after freezing is rewarming. The utility model discloses in the rewarming return circuit that provides can heat year cold medium to carry to target tissue department through the pipe, this kind of rewarming return circuit that sets up alone not only can satisfy cold volume and use the component to carry out the needs of rewarming, and be favorable to very much carrying out more accurate control to rewarming temperature, process and time, and then improve operation cure rate, reduce postoperative complication.

7. In the refrigeration equipment provided by the utility model, the rewarming loop comprises a rewarming pipe, and a heating device is connected in series on the rewarming pipe; and the liquid inlet end of the rewarming pipe is connected with the upstream of the liquid inlet of the hot fluid channel by a second three-way valve. After the rewarming pipe is connected with the upstream of the second cold energy exchange device on the medium supply pipeline, the rewarming pipe is connected with the first cold energy exchange device and the second cold energy exchange device in parallel, and the pipeline for heating the secondary refrigerant and the pipeline for cooling the secondary refrigerant are independent. Therefore, the interference of the residual cold quantities of the first cold quantity exchange device and the second cold quantity exchange device to the temperature rising process of the secondary refrigerant in the rewarming stage can be avoided, the interference factors of the rewarming process are reduced, and the control of the rewarming process is more convenient to control.

8. The utility model provides an among the refrigeration plant, rewarming return circuit still includes rewarming return line, rewarming return line is used for the liquid end that goes out with cold volume use component and the liquid mouth intercommunication that returns of medium storage jar intercommunication. The separately arranged rewarming return line can enable the rewarming process to form a separate rewarming loop consisting of the medium storage tank, the rewarming pipe, the cold using element and the rewarming return line, so that interference factors in the rewarming process can be further reduced, and the rewarming process control is more accurate.

9. The refrigeration equipment provided by the utility model also comprises a heat insulation device, wherein the heat insulation device is provided with a heat insulation cavity suitable for reducing or isolating heat conduction with the outside, and the cold output ends of the first cold quantity exchange device, the second cold quantity exchange device, the cold accumulation device and the cold quantity generation device are positioned in the heat insulation cavity; the rewarming return pipe is arranged outside the heat insulation device. The rewarming return pipe is arranged behind the outer part of the heat insulation device, so that the cold quantity in the cold storage device or the second cold quantity exchange device can be prevented from being taken away when the rewarming return pipe conveys the cold carrying medium after rewarming, and the utilization rate of the cold quantity is improved.

To sum up, the utility model provides a refrigeration plant can improve the utilization efficiency to cold volume, still has the accurate advantage of rewarming process control simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a refrigeration apparatus provided in embodiment 1 of the present invention;

FIG. 2 is a schematic flow diagram of a cooling medium of the refrigeration apparatus of FIG. 1 during a pre-cooling stage;

FIG. 3 is a schematic flow diagram of a cooling medium in a cooling stage of the refrigeration apparatus shown in FIG. 1;

FIG. 4 is a schematic flow diagram of a cooling medium in a rewarming phase of the refrigeration appliance of FIG. 1;

description of reference numerals:

1-medium storage tank, 2-medium supply pipeline, 3-medium recovery pipeline, 4-cold generating device, 5-first cold exchanging device, 6-second cold exchanging device, 7-guide pipe, 8-cold head, 9-bypass pipe, 10-first three-way valve, 11-cold storage device, 12-heat insulation device, 13-heat insulation cavity, 14-vacuum pumping device, 15-rewarming pipe, 16-temperature raising device, 17-second three-way valve, 18-rewarming return pipe, 19-third three-way valve, 20-pumping device, 21-flowmeter, 22-thermometer, 23-one-way valve and 24-radiator.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1:

as shown in fig. 1 to 4, for embodiment 1 of the present invention, this embodiment provides a refrigeration device, which can be used in a cryoablation device to refrigerate a cold head 8, but not only limited to be applied to cryoablation, but also used in other devices with a cold energy using element to pre-cool, refrigerate and rewarming, such as a refrigerator, an air conditioner, and a cold chain logistics vehicle. However, for clarity of explanation, the present embodiment will be described with only the cold energy-using element being the cold head 8 of the cryoablation apparatus.

The present embodiment comprises a medium storage tank 1, a medium supply line 2, a medium recovery line 3, a cold generation device 4, a first cold exchange device 5 and a second cold exchange device 6. The medium storage tank 1 stores loaded cold medium; one end of the medium supply pipeline 2 is communicated with the medium storage tank 1, and the other end of the medium supply pipeline is suitable for being communicated with a liquid inlet end of the cold energy using element; one end of the medium recovery pipeline 3 is communicated with the medium storage tank 1, and the other end of the medium recovery pipeline is suitable for being communicated with the liquid outlet end of the cold energy using element; the cold generating device 4 is used for providing cold; the first cold quantity exchanging device 5 is arranged on the medium supply pipeline 2, the cold quantity generating device 4 provides cold quantity for the first cold quantity exchanging device 5, and the first cold quantity exchanging device 5 is used for carrying out refrigeration heat exchange on cold-carrying media passing through the first cold quantity exchanging device 5; the second cold exchange device 6 is provided with a hot fluid channel arranged on the medium supply pipeline 2 and a cold fluid channel arranged on the medium recovery pipeline 3, cold exchange is generated between the cold fluid channel and the hot fluid channel, and cold-carrying media flowing through the hot fluid channel are precooled; the hot fluid channel is connected between the medium storage tank 1 and the first cold exchanging device 5.

When the refrigeration equipment is used for carrying out cryoablation, the medium supply pipeline 2, the medium recovery pipeline 3, the catheter 7 of the cryoablation system and the cold head 8 are utilized to make the cold-carrying medium circularly flow, and during the flowing process, the cold energy generated at the cold energy generating device 4 is transported to the medium supply line 2 via the first cold energy exchanging device 5, then the refrigerant is delivered into the human body through the catheter 7 to carry out cryoablation on the target tissue, the refrigerant-carrying medium which exchanges supercooling with the target tissue flows into the medium recovery pipeline 3 from the catheter 7, part of cold energy still remains in the cold carrying medium at this time, and then when the cold carrying medium flows through the medium recovery pipeline 3, due to the second cold quantity exchanging device 6, the cold quantity remained in the cold carrying medium can be conducted to the cold carrying medium in the medium supply pipeline 2 through the second cold quantity exchanging device 6, so that the cold carrying medium at the position is cooled in advance.

In the above process, since the second coldness exchange device 6 is located at an upstream position on the medium supply pipe 2 with respect to the first coldness exchange device 5 where the temperature of the coldness-carrying medium in the medium supply pipe 2 is higher than the temperature in the medium recovery pipe 3, conduction of coldness from the medium recovery pipe 3 to the medium supply pipe 2 can be ensured. Through the process, the residual cold quantity of the cold carrying medium in the medium recovery pipeline 3 can pre-cool the cold carrying medium, the initial temperature of the cold carrying medium entering the first cold quantity exchange device 5 is reduced, and further under the condition of the same cold quantity exchange quantity, the pre-cooled cold carrying medium can reach lower temperature, so that the cryoablation mode for directly refrigerating normal pressure liquid is more likely to reach the temperature required by cryoablation, and meanwhile, the utilization efficiency of the cold quantity can be improved.

Specifically, the cold generating device 4 in this embodiment is a micro cryogenic refrigerator capable of providing a cold source below-120 ℃, and may be in the form of a pulse tube, stirling, mixed working medium throttling, thermoacoustic, or the like, and the number of the micro cryogenic refrigerators may be one or more than one, and when a plurality of micro cryogenic refrigerators work together, the combination mode may be in series or in parallel. The cold carrying medium in this embodiment is a liquid having a freezing point lower than-90 deg.c, such as medical grade ethanol.

In order to further reduce the lowest temperature which can be reached by the cold carrying medium, the cold carrying device further comprises a bypass pipe 9, wherein the bypass pipe 9 is communicated with the medium supply pipeline 2 and the medium recovery pipeline 3, and the medium supply pipeline 2 and the medium recovery pipeline 3 form a precooling loop which is connected with the medium storage tank 1 and the first cold exchanging device 5 in series; and the bypass pipe 9 communicates with the medium supply line 2 via a first three-way valve 10.

By utilizing the bypass pipe 9, the secondary refrigerant can be precooled before being introduced into a human body for cryoablation, and in the precooling stage, the secondary refrigerant medium flows through the medium supply pipeline 2, the first cold energy exchanging device 5, the bypass pipe 9 and the medium recovery pipeline 3 in sequence after coming out of the medium storage tank 1 and finally returns to the medium storage tank 1. The temperature of the precooled cold-carrying medium is reduced, the cold-carrying medium has lower initial temperature when entering a cryoablation stage, and the low temperature required by cryoablation can be more easily achieved after the cold quantity is reduced by the first cold quantity exchange device 5. This therefore enables a further increase in the possibility that the cooling device is a cold carrier medium to reach the temperature required for cryoablation.

As a modified embodiment of the refrigerating equipment, the refrigerating equipment further comprises a cold accumulation device 11 which is arranged on the medium recovery pipeline 3, is communicated with the first cold exchange device 5 by a bypass pipe 9 and is suitable for storing cold flowing out of the first cold exchange device 5. In this embodiment, the cold storage device 11 is specifically a box body filled with a cold storage medium with a higher specific heat capacity, the medium recovery pipeline 3 penetrates through the cold storage device 11, and cold exchange occurs between the side wall of the pipeline and the cold storage medium in the cold storage device 11.

In the pre-cooling stage, the cold storage device 11 can store a part of cold energy brought by cold carrying medium, and after the cryoablation stage starts, the stored cold energy can pre-cool the cold carrying medium reserved from the human body, so that the temperature difference between the cold fluid channel and the hot fluid channel at the second cold energy exchange device 6 is increased, the cold energy exchange rate at the second cold energy exchange device 6 is increased, the temperature of the cold carrying medium in the medium supply pipeline 2 is further reduced, and the pre-cooled cold carrying medium can reach lower temperature after being finally cooled by the first cold energy exchange device 5. Therefore, the refrigeration equipment can further ensure that the low temperature required by cryoablation can be reached, the utilization efficiency of cold energy can be further improved, and the waste of the cold energy is reduced.

In order to reduce the cold loss, the cold storage device further comprises a heat insulation device 12, the heat insulation device 12 is provided with a heat insulation cavity 13 suitable for reducing or insulating heat conduction with the outside, and the cold output ends of the first cold exchange device 5, the second cold exchange device 6, the cold storage device 11 and the cold generation device 4 are positioned in the heat insulation cavity 13. By utilizing the heat insulation device 12, the loss of cold energy generated in the cold energy exchange process can be avoided, meanwhile, the heat preservation effect of the cold accumulation device 11 is better, and the loss of cold energy generated in the cold accumulation device 11 in the cold energy storage process is avoided.

Specifically, the heat insulation device 12 is a box body, and a vacuum pumping device 14 communicated with the heat insulation cavity 13 is mounted on the heat insulation device 12. The heat insulation cavity 13 close to the vacuum state can further reduce the loss rate of the cold quantity, so that the utilization efficiency of the cold quantity is further improved by the refrigeration equipment. The evacuation device 14 is embodied as a small vacuum pump.

As an alternative embodiment of the heat insulating device, the heat insulating device 12 is a box body, and the heat insulating chamber 13 is filled with a heat insulating material. The heat insulating material may be polyurethane foam or aerogel.

In order to meet the requirement that target tissues need rewarming after being frozen in the cryoablation, the device further comprises a rewarming loop in the embodiment, and the rewarming loop is used for heating the cold-carrying medium in the storage tank and then conveying the cold-carrying medium to the liquid inlet end of the catheter 7 in the cryoablation device. In the cryoablation, the target tissue after freezing needs to be rewarming, and the ideal rewarming process can improve the operation effect of the cryoablation and reduce the probability of postoperative complications. The utility model discloses in the rewarming return circuit that provides can heat year cold medium to carry to target tissue department through pipe 7, this kind of rewarming return circuit that sets up alone not only can satisfy the cryoablation art and carry out the needs of rewarming, and be favorable to very much carrying out more accurate control to rewarming temperature, process and time, and then improve operation cure rate, reduce postoperative complication.

Specifically, the rewarming loop comprises a rewarming pipe 15, and a heating device 16 is connected on the rewarming pipe 15 in series; the liquid inlet end of the rewarming pipe 15 is connected with the upstream of the liquid inlet of the hot fluid channel by a second three-way valve 17. After the rewarming pipe 15 is connected with the upstream of the second cold energy exchanging device 6 on the medium supply pipeline 2, the rewarming pipe 15 is connected with the first cold energy exchanging device 5 and the second cold energy exchanging device 6 in parallel, and the pipelines for heating the secondary refrigerant and the pipelines for cooling the secondary refrigerant are independent. Therefore, the interference of the residual cold quantities of the first cold quantity exchange device 5 and the second cold quantity exchange device 6 to the temperature rising process of the secondary refrigerant in the rewarming stage can be avoided, the interference factors of the rewarming process are reduced, and the control of the rewarming process is more convenient to control.

As an alternative embodiment of the above-mentioned rewarming circuit, said rewarming circuit comprises: a rewarming tube 15; the medium inlet end of the rewarming pipe 15 is connected by means of a second three-way valve 17 to the side of the medium supply line 2 which does not enter the first cold volume exchange device 5. In the alternative embodiment, the temperature rising device is not connected in series on the rewarming loop, but only the uncooled cold carrying medium is led into the conduit to participate in the rewarming process, and the self heat of the human body is utilized for rewarming. This action makes the heating up of target tissue more gentle, reduces the damage of cryoablation to healthy tissue.

As a further improvement of the rewarming circuit, the rewarming circuit further comprises a rewarming return pipeline, and the rewarming return pipeline is used for communicating the liquid outlet end of the catheter 7 in the cryoablation device with a liquid return port communicated with the medium storage tank 1. The separately arranged rewarming return line can enable the rewarming process to form a separate rewarming loop consisting of the medium storage tank 1, the rewarming pipe 15, the cryoablation device and the rewarming return line, so that interference factors in the rewarming process can be further reduced, and the rewarming process control is more accurate.

Specifically, the rewarming return line comprises a rewarming return pipe 18, both ends of which are communicated with the medium recovery line 3 and are connected in parallel with the second cold energy exchange device 6; the liquid inlet end of the rewarming return pipe 18 is connected with the medium supply pipeline 2 by a third three-way valve 19. Further, the rewarming return pipe 18 is located outside the thermal insulation device 12. The rewarming return pipe 18 is arranged behind the heat insulation device 12, so that the cold energy in the cold storage device 11 or the second cold energy exchange device 6 can be prevented from being taken away by the rewarming return pipe 18 when the rewarming return pipe is used for conveying the cold carrying medium after rewarming, and the utilization rate of the cold energy is improved.

In order to ensure the smooth circulation of the cold carrier medium, a pumping device 20 is connected in series on the medium supply pipeline 2 or the medium recovery pipeline 3, and the pumping device 20 is suitable for providing power for the flow of the cold carrier medium.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (14)

1. A refrigeration device for providing refrigeration to a refrigeration usage element, comprising:

a medium storage tank (1) for storing a cold-carrying medium;

one end of the medium supply pipeline (2) is communicated with the medium storage tank (1), and the other end of the medium supply pipeline is suitable for being communicated with a liquid inlet end of the cold energy using element;

one end of the medium recovery pipeline (3) is communicated with the medium storage tank (1), and the other end of the medium recovery pipeline is suitable for being communicated with the liquid outlet end of the cold energy using element;

the cold generating device (4) is used for providing cold;

the first cold energy exchange device (5) is arranged on the medium supply pipeline (2), the cold energy generating device (4) provides cold energy for the first cold energy exchange device (5), and the first cold energy exchange device (5) is used for carrying out refrigeration heat exchange on cold-carrying media passing through the first cold energy exchange device (5);

it is characterized by also comprising:

the second cold exchange device (6) is provided with a hot fluid channel arranged on the medium supply pipeline (2) and a cold fluid channel arranged on the medium recovery pipeline (3), cold exchange is generated between the cold fluid channel and the hot fluid channel, and cold-carrying media flowing through the hot fluid channel are precooled;

the hot fluid channel is connected between the medium storage tank (1) and the first cold exchange device (5).

2. A refrigeration apparatus as recited in claim 1, further comprising:

the bypass pipe (9), the said bypass pipe (9) is communicated with medium supply line (2) and medium recovery pipeline (3), and make the medium supply line (2) and medium recovery pipeline (3) form the precooling circuit of the medium storage tank (1) and first cold exchange unit (5) of the series connection;

and the bypass pipe (9) is communicated with the medium supply pipeline (2) through a first three-way valve (10).

3. A refrigeration apparatus as recited in claim 2, further comprising:

and the cold accumulation device (11) is arranged on the medium recovery pipeline (3), is communicated with the first cold exchange device (5) by utilizing the bypass pipe (9), and is suitable for storing the cold flowing out of the first cold exchange device (5).

4. A refrigeration apparatus as recited in claim 3, further comprising:

and the heat insulation device (12) is provided with a heat insulation cavity (13) suitable for reducing or insulating heat conduction with the outside, and the cold output ends of the first cold energy exchange device (5), the second cold energy exchange device (6), the cold accumulation device (11) and the cold generation device (4) are positioned in the heat insulation cavity (13).

5. A refrigeration plant according to claim 4, characterized in that said insulating means (12) is a box, said insulating means (12) being provided with evacuation means (14) communicating with an insulating chamber (13).

6. Refrigeration appliance according to claim 4, characterized in that said thermal insulation means (12) is a box, said thermal insulation chamber (13) being filled with a thermal insulation substance.

7. A refrigerating apparatus as claimed in claim 1, characterized by further comprising a rewarming circuit for transporting the cold-carrying medium in the medium storage tank (1) to the inlet side of the cold use element.

8. Refrigeration apparatus according to claim 7, characterized in that said rewarming circuit comprises:

a rewarming tube (15);

and the medium inlet end of the rewarming pipe (15) is connected with one side which is arranged on the medium supply pipeline (2) and does not enter the first cold exchange device (5) by using a second three-way valve (17).

9. The refrigeration equipment as claimed in claim 1, further comprising a rewarming circuit for delivering the refrigerant in the storage tank after heating to the inlet end of the refrigeration usage element.

10. A refrigeration apparatus as recited in claim 9 wherein said rewarming circuit comprises:

a reheating pipe (15) which is connected with a heating device (16) in series;

and the liquid inlet end of the rewarming pipe (15) is connected with the upstream of the liquid inlet of the hot fluid channel by a second three-way valve (17).

11. A refrigeration apparatus as recited in claim 10 wherein said rewarming circuit further comprises:

and the rewarming return pipeline is used for communicating the liquid outlet end of the cold energy using element with the liquid return port of the medium storage tank (1).

12. A refrigeration apparatus as recited in claim 11 wherein said reheat return line comprises:

a rewarming return pipe (18), both ends of which are communicated with the medium recovery pipeline (3) and are connected with the second cold energy exchange device (6) in parallel;

and the liquid inlet end of the rewarming return pipe (18) is connected with the medium supply pipeline (2) by a third three-way valve (19).

13. A refrigeration apparatus as recited in claim 12, further comprising:

the heat insulation device (12) is provided with a heat insulation cavity (13) suitable for reducing or insulating heat conduction with the outside, and the cold output ends of the first cold energy exchange device (5), the second cold energy exchange device (6), the cold accumulation device (11) and the cold generation device (4) are positioned in the heat insulation cavity (13);

the rewarming return pipe (18) is arranged outside the heat insulation device (12).

14. Refrigeration plant according to any of claims 1 to 13, characterized in that a pumping device (20) is connected in series to the medium supply line (2) or the medium recovery line (3), said pumping device (20) being adapted to power the flow of the cooling medium.

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