A medical tissue cooling system

Abstract

The application provides a medical tissue cooling system, which comprises a track for continuously conveying a plurality of medical tissues to be cooled; a wind cover covering the track so that the tissues to be cooled can pass through the wind cover, the upper and lower surfaces of the wind cover being respectively provided with an air inlet joint and an air outlet joint; and a cold air machine comprising an air outlet flow guide and an air return flow guide, the air outlet flow guide being connected to the air inlet joint through a first pipeline, and the air return flow guide being connected to the air outlet joint through a second pipeline, the cold air machine being capable of generating cold air so that cold air can flow from the air outlet flow guide into the air inlet joint and from the air outlet joint into the air return flow guide. The medical tissue cooling system of the application can efficiently and batchwise cool medical tissues and has low energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the medical field, in particular to a medical tissue cooling system. BACKGROUND

[0002] Medical tissues need to be preprocessed under low temperature to avoid high temperature causing tissue failure.

[0003] The existing preprocessing usually uses a refrigerator, places the medical tissues in a carrying box, places the carrying box in the refrigerator, takes out the carrying box after cooling for a period of time, and then places it in another carrying box, and so on. The efficiency of such preprocessing is relatively low, and personnel need to frequently open and close the door of the refrigerator to place and take out the medical tissues, and the energy consumption of the refrigerator is also relatively large. SUMMARY

[0004] In view of the above problems of the prior art, the purpose of the present application is to provide a medical tissue cooling system which can efficiently and batch cool medical tissues with low energy consumption.

[0005] In order to solve the above problems, the present application provides a medical tissue cooling system, which comprises:

[0006] A track for continuously conveying a plurality of medical tissues to be cooled;

[0007] A wind cover covering the track so that the medical tissues to be cooled can pass through the wind cover, the upper and lower surfaces of the wind cover being respectively formed with air inlet joints and air outlet joints;

[0008] A cold air machine comprising an exhaust air flow guide and a return air flow guide, the exhaust air flow guide being connected to the air inlet joint through a first pipeline, the return air flow guide being connected to the air outlet joint through a second pipeline, the cold air machine being capable of generating cold air so that cold air can flow from the exhaust air flow guide into the air inlet joint and from the air outlet joint into the return air flow guide.

[0009] Further, the track is formed as a ring track or a C-shaped track, and the wind cover comprises:

[0010] A wind cover body covering the arc portion of one end of the track and following the track to form an arc shape, the wind cover body forming a cooling cavity;

[0011] A plurality of air inlet joints arranged on the outer side of the lower surface of the wind cover body, the plurality of air inlet joints being arranged at intervals along the extension direction of the wind cover body;

[0012] A plurality of air outlet joints are arranged on the inner side of the upper surface of the air cover body, and the plurality of air outlet joints are arranged at intervals along the extension direction of the air cover body.

[0013] Further, the air inlet joint is formed as an air inlet pipe which extends into the interior of the air cover body, and a first bevel cut is formed at the top end of the air inlet pipe which faces the upper surface of the track;

[0014] The air outlet joint is formed as an air outlet pipe which extends into the interior of the air cover body, and a second bevel cut is formed at the bottom end of the air outlet pipe which faces the upper surface of the track.

[0015] Further, one end of the air outlet guide on the outer side is formed with a plurality of first air pipes which correspond to the plurality of air inlet joints, and the plurality of first air pipes connect the plurality of air inlet joints through a plurality of first pipes;

[0016] One end of the air return guide on the outer side is formed with a plurality of second air pipes which correspond to the plurality of air outlet joints, and the plurality of second air pipes connect the plurality of air outlet joints through a plurality of second pipes.

[0017] Further, the air cooler further comprises:

[0018] A compressor which is capable of compressing refrigerant;

[0019] A condenser which receives refrigerant from the compressor and cools the refrigerant;

[0020] A capillary tube which receives refrigerant from the condenser and throttles and depressurizes the refrigerant;

[0021] An evaporator which receives refrigerant from the capillary tube at a first end, and transmits the refrigerant to the compressor at a second end;

[0022] A housing which accommodates the evaporator, and opposite sides of the housing are respectively communicated with the air outlet guide and the air return guide;

[0023] A fan which is arranged between the housing and the air outlet guide, or arranged between the housing and the air return guide, and the air direction of the fan is from the air return guide to the air outlet guide.

[0024] Further, the capillary tube comprises a first capillary tube and a second capillary tube, two ends of the first capillary tube are respectively connected to the condenser and the evaporator, a first end of the second capillary tube is connected to the condenser through an electromagnetic valve, and a second end of the second capillary tube is connected to the evaporator, and the medical tissue cooling system further comprises:

[0025] A cold air temperature sensor is disposed inside the fan cover or the housing to detect the current cold air temperature.

[0026] The controller opens the solenoid valve when the current cold air temperature is higher than a first predetermined temperature, and closes the solenoid valve when the current cold air temperature is lower than a second predetermined temperature.

[0027] Furthermore, the evaporator is a finned evaporator, comprising fins and a coil, and the evaporator is connected to the capillary tube and the compressor via the coil. The medical tissue cooling system further includes:

[0028] An electric heating rod, wherein the electric heating rod is inserted into the fins;

[0029] A coil temperature sensor, connected to the coil, is used to detect the current coil temperature.

[0030] The controller is also connected to the electric heating rod and the coil temperature sensor. When the current coil temperature detected by the coil temperature sensor is lower than a predetermined coil temperature, and the temperature difference between the current coil temperature and the current cold air temperature detected by the cold air temperature sensor is greater than a first predetermined value, the controller turns off the fan and the solenoid valve, and controls the electric heating rod to heat.

[0031] Furthermore, the medical tissue cooling system also includes:

[0032] A semiconductor refrigeration chip, wherein the heating surface of the semiconductor refrigeration chip is in close contact with the fins;

[0033] A coil temperature sensor, connected to the coil, is used to detect the current coil temperature.

[0034] The controller is also connected to the thermoelectric cooler to control the thermoelectric cooler to operate based on the temperature difference between the current coil temperature and the current cold air temperature detected by the cold air temperature sensor being greater than a second predetermined value, wherein the first predetermined difference is greater than the second predetermined difference.

[0035] Furthermore, the medical tissue cooling system also includes:

[0036] A gas-liquid heat exchanger comprises a first channel and a second channel which are independent and adjacent to each other and can exchange heat, two ends of the first channel are connected to the evaporator and the compressor respectively, the evaporator is connected to the compressor through the first channel, two ends of the second channel are connected to the condenser and the capillary tube respectively, and the condenser is connected to the capillary tube through the second channel.

[0037] Further, the medical tissue cooling system further comprises:

[0038] A liquid storage tank, a first end of the liquid storage tank is connected to the second channel of the gas-liquid heat exchanger;

[0039] A drying filter, a first end of the drying filter is connected to a second end of the liquid storage tank, and a second end of the drying filter is connected to the capillary tube, and the second channel of the gas-liquid heat exchanger is connected to the capillary tube through the liquid storage tank and the drying filter;

[0040] A gas-liquid separator, the first channel of the gas-liquid heat exchanger is connected to the compressor through the gas-liquid separator;

[0041] An oil separator, the compressor is connected to the condenser through the oil separator.

[0042] Due to the above technical scheme, the present application has the following beneficial effects:

[0043] According to the medical tissue cooling system, the track carries and transmits a plurality of medical tissues to be cooled, meets the demand of batch operation, the plurality of medical tissues to be cooled pass through the air hood in turn, the cooling cavity is formed in the air hood, the air cooler can generate cold air, the cold air flows into the air inlet joint of the air hood from the air outlet guide of the air cooler through the first pipeline, thereby cooling the medical tissues to be cooled in the air hood, realizing the pretreatment of the medical tissues to be cooled, and the cold air after cooling the medical tissues to be cooled flows to the air outlet joint and then flows into the air return guide of the air cooler through the second pipeline, thereby realizing the recycling of the cold air, reducing the energy consumption of the air cooler, thereby efficiently and batchly cooling the medical tissues to be cooled, and realizing the recycling of the cold air and reducing the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0045] Figure 1is a structural diagram of a part of a track and a fan cover according to an embodiment of the present application;

[0046] Figure 2 is Figure 1 is a structural diagram of a fan cover in

[0047] Figure 3 is Figure 1 is a structural diagram of a part of a track and a fan cover main body removing top and side in

[0048] Figure 4 is a schematic diagram of a cold air machine according to an embodiment of the present application;

[0049] Figure 5 is a structural diagram of a cold air machine according to an embodiment of the present application;

[0050] Figure 6 is Figure 5 is a structural diagram of an upper part of a cold air machine in

[0051] Figure 7 is Figure 5 is a structural diagram of a lower part of a cold air machine in

[0052] Reference signs:

[0053] 1100, fan cover; 1110, fan cover main body; 1120, air outlet connector; 1130, air inlet connector; 1210, track; 1220, medical tissue; 2100, compressor; 2210, oil separator; 2220, gas-liquid separator; 2300, condenser; 2410, dry filter; 2420, liquid storage tank; 2510, first capillary tube; 2520, second capillary tube; 2530, electromagnetic valve; 2610, evaporator; 2611, coil pipe; 2612, fin; 2613, electric heating rod; 2710, fan; 2730, return air flow guide; 2720, exhaust air flow guide; 2800, shell; 2900, gas-liquid heat regenerator. DETAILED DESCRIPTION

[0054] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0055] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0056] Next, the medical tissue cooling system of the embodiments of the present application is described.

[0057] As shown in Figure 1 and Figure 7 , the medical tissue cooling system of the embodiments of the present application includes a track 1210, a wind cover 1100, and a cold air machine.

[0058] First, the track 1210 and the wind cover 1100 are described. The track 1210 is used to continuously transport a plurality of medical tissues 1220 to be cooled. The wind cover 1100 covers the track 1210, so that the medical tissues to be cooled can pass through the wind cover 1100, and the upper and lower surfaces of the wind cover 1100 are respectively formed with an air inlet joint and an air outlet joint.

[0059] As shown in Figure 1 , the wind cover 1100 covers part of the track 1210, and it should be noted that the above is only an optional example, and the wind cover 1100 can also cover the entire track 1210, which should be understood within the scope of the present application.

[0060] The track 1210 carries and transports a plurality of medical tissues 1220 to be cooled, which pass through the wind cover 1100 in turn, and the cold air in the wind cover 1100 cools the medical tissues 1220 to be cooled, thereby realizing the pretreatment of the medical tissues to be cooled.

[0061] The upper surface of the wind cover 1100 can be provided with an air inlet joint, and the lower surface thereof is correspondingly provided with an air outlet joint. Alternatively, the lower surface of the wind cover 1100 can be provided with an air inlet joint, and the upper surface thereof is correspondingly provided with an air outlet joint.

[0062] Next, the cold air machine is described. The cold air machine includes an air outlet guide 2720 and an air return guide 2730, the air outlet guide 2720 is connected to the air inlet joint through a first pipe, the air return guide 2730 is connected to the air outlet joint through a second pipe, and the cold air machine can generate cold air so that the cold air can flow from the air outlet guide 2720 into the air inlet joint, and can flow from the air outlet joint into the air return guide 2730.

[0063] As shown in Figure 5As shown, the cold air of the air cooler flows into the air exhaust guide 2720, and the cold air in the air exhaust guide 2720 flows into the air hood 1100 through the first pipeline, so that the cold air in the air hood 1100 cools the medical tissue 1220 to be cooled for pretreatment. Because the wind speed is fast, the temperature of the cold air does not rise too much, and the temperature is still low. The cold air after cooling the medical tissue 1220 to be cooled flows into the air outlet joint, and then flows from the air outlet joint to the air return guide 2730 of the air cooler, so that the cold air is recycled and regenerated, and the energy consumption of the air cooler can be reduced.

[0064] The first pipeline and the second pipeline can be a hose, a hard pipe or the like. The air hood 1100 is connected to the air cooler through the first pipeline and the second pipeline, so that the cooling system can reduce the occupied space and be arranged flexibly.

[0065] The medical tissue cooling system has the track 1210 carrying and conveying a plurality of medical tissues 1220 to be cooled, meets the demand of batch operation, and the plurality of medical tissues 1220 to be cooled pass through the air hood 1100 in sequence. The air hood 1100 forms a cooling cavity inside. The air cooler can generate cold air. The cold air flows from the air exhaust guide 2720 of the air cooler to the air inlet joint of the air hood 1100 through the first pipeline, so that the cold air in the air hood 1100 cools the medical tissue 1220 to be cooled, realizes pretreatment of the medical tissue 1220 to be cooled, and the cold air after cooling the medical tissue 1220 to be cooled flows to the air outlet joint, and then flows into the air return guide 2730 of the air cooler through the second pipeline, so that the cold air is recycled and regenerated, and the energy consumption of the air cooler can be reduced. Therefore, the medical tissue 1220 to be cooled can be efficiently and batch cooled, and the cold air can be recycled and regenerated, and the energy consumption can be reduced.

[0066] In some embodiments of the present application, the track 1210 is formed as a ring track or a C-shaped track, and the air hood 1100 includes an air hood body 1110, a plurality of air inlet joints and a plurality of air outlet joints. The air hood body 1110 covers the arc part of one end of the track 1210 and is formed as an arc shape following the track 1210. The air hood body 1110 forms a cooling cavity. The plurality of air inlet joints are arranged on the outer side of the lower surface of the air hood body 1110 and are arranged at intervals along the extension direction of the air hood body 1110. The plurality of air outlet joints are arranged on the inner side of the upper surface of the air hood body 1110 and are arranged at intervals along the extension direction of the air hood body 1110.

[0067] As shown in the drawings, Figure 2 The ring track and the C-shaped track can reduce the length of the space occupied by the track 1210, and facilitate the operation of the operator.

[0068] The circular-arc-shaped wind cover body 1110 covers the circular-arc part of the track 1210, and forms a cooling cavity, which can concentrate cooling of the medical tissue to be cooled and avoid excessive heat exchange between the cold air in the wind cover 1100 and the air outside.

[0069] The multiple air inlets arranged on the outer side of the lower surface of the wind cover body 1110 can receive cold air from the cold air machine, so that the distribution of the cold air in the wind cover 1100 is relatively uniform, thereby making the temperature of each area in the wind cover 1100 relatively uniform. The multiple air outlets arranged on the inner side of the upper surface of the wind cover body 1110 can receive the cold air after cooling the medical tissue to be cooled 1220. The air inlets and the air outlets are arranged on the outer side and the inner side of the wind cover 1100 respectively, which can increase the travel of the cold air and increase the utilization rate of the cold air.

[0070] Further, the air inlets are formed as air inlet pipes 1130, which extend into the interior of the wind cover body 1110, and the top ends of the air inlet pipes 1130 are formed with first bevel cuts facing the upper surface of the track 1210. The air outlets are formed as air outlet pipes 1120, which extend into the interior of the wind cover body 1110, and the bottom ends of the air outlet pipes 1120 are formed with second bevel cuts facing the upper surface of the track 1210.

[0071] As shown in Figure 3 , the air inlets are formed as air inlet pipes 1130, and the first bevel cuts of the air inlet pipes 1130 face the upper surface of the track 1210. The air outlets are formed as air outlet pipes 1120, and the second bevel cuts of the air outlet pipes 1120 face the upper surface of the track 1210. In this way, the main flow direction of the cold air in the wind cover 1100 can be horizontal, parallel to the upper surface of the track 1210, that is, the cold air blows horizontally to the medical tissue to be cooled on the track 1210, and the cold air directly faces the medical tissue to be cooled 1220, which can shorten the travel of the cold air and enable the cold air to efficiently cool the medical tissue to be cooled 1220.

[0072] In some embodiments of the present application, one end of the air outlet flow guide 2720 on the outer side is formed with multiple first air pipes corresponding to the multiple air inlets one by one, and the multiple first air pipes connect the multiple air inlets through multiple first pipes. One end of the air return flow guide 2730 on the outer side is formed with multiple second air pipes corresponding to the multiple air outlets one by one, and the multiple second air pipes connect the multiple air outlets through multiple second pipes.

[0073] As shown in Figure 2 and Figure 5 , the 10 first air pipes of the air outlet flow guide 2720 are connected to the 10 air inlets one by one through the 10 first pipes, and the 10 second air pipes of the air return flow guide 2730 are connected to the 10 air outlets one by one through the 10 second pipes.

[0074] In other words, the evaporative cooler supplies cool air to the shroud 1100 through multiple first pipes, and the cool air from the shroud 1100 is returned through multiple second pipes. Even if some of the first or second pipes malfunction, it will not affect the others, increasing the reliability of the cooling system. Moreover, it makes the distribution of cool air within the shroud body 1110 more uniform.

[0075] In some embodiments of the present invention, the evaporator includes a compressor 2100, a condenser 2300, a capillary tube, an evaporator 2610, a housing 2800, and a fan 2710. The compressor 2100 compresses a refrigerant. The condenser 2300 receives refrigerant from the compressor 2100 and cools the refrigerant. The capillary tube receives refrigerant from the condenser 2300 and throttles and reduces the pressure of the refrigerant. A first end of the evaporator 2610 receives refrigerant from the capillary tube, and a second end of the evaporator transfers the refrigerant to the compressor 2100. The housing 2800 houses the evaporator 2610, and opposite sides of the housing 2800 are respectively connected to an exhaust fan guide 2720 and a return fan guide 2730. The fan 2710 is located between the housing 2800 and the exhaust air guide 2720, or between the housing 2800 and the return air guide 2730, with the airflow direction of the fan 2710 from the return air guide 2730 to the exhaust air guide 2720.

[0076] like Figures 4 to 7 As shown, the compressor 2100 turns the refrigerant into a high-temperature, high-pressure gaseous refrigerant. The condenser 2300 cools the high-temperature, high-pressure gaseous refrigerant to make it into a liquid refrigerant. The capillary tube turns the liquid refrigerant into a mist refrigerant. The mist refrigerant vaporizes in the evaporator 2610, thereby lowering the temperature of the evaporator 2610. The evaporator 2610 transfers the refrigerant to the compressor 2100, facilitating the circulation of the refrigerant and thus achieving a continuous and stable low temperature in the evaporator 2610.

[0077] The fan 2710 delivers the low temperature of the evaporator 2610 inside the housing 2800 as cold air to the shroud 1100 through the exhaust fan 2720 and the first duct, thereby cooling the medical tissue 1220 to be cooled. The cold air in the cooling chamber is transferred to the evaporator 2610 inside the housing 2800 through the second duct and the return air fan 2730, achieving efficient cooling and regenerating the cold air. This reduces the energy consumption of the air cooler, and blowing the cold air directly onto the evaporator 2610 reduces frost formation on the evaporator 2610.

[0078] The housing 2800 can seal the evaporator 2610, reducing heat exchange between the evaporator and the outside world, and concentrating the low temperature of the evaporator 2610 inside the housing 2800.

[0079] Furthermore, the capillary includes a first capillary 2510 and a second capillary 2520. The two ends of the first capillary 2510 are connected to the condenser 2300 and the evaporator 2610, respectively. The first end of the second capillary 2520 is connected to the condenser 2300 via a solenoid valve 2530, and its second end is connected to the evaporator 2610. The medical tissue cooling system also includes a cold air temperature sensor and a controller. The cold air temperature sensor is located inside the fan shroud 1100 or the housing 2800 to detect the current cold air temperature. The controller opens the solenoid valve 2530 if the current cold air temperature is higher than a first predetermined temperature, and closes the solenoid valve 2530 if the current cold air temperature is lower than a second predetermined temperature.

[0080] like Figure 4 and Figure 5 As shown, temperature control is achieved through the first capillary tube 2510, the second capillary tube 2520, and the solenoid valve 2530. Since the medical tissue 1220 to be cooled requires a very low temperature, the normally open first capillary tube 2510 can stably maintain the low temperature of the evaporator 2610, and the solenoid valve 2530 controls the flow rate of refrigerant through the second capillary tube 2520 to achieve precise temperature control of the evaporator 2610.

[0081] Capillary tubes do not require electrical control, have excellent stability, and can achieve a large flow rate of refrigerant, avoiding the very serious consequences of medical tissue 1220 failure due to possible expansion valve failure or abnormal preset temperature setting. Moreover, the cost of capillary tubes is lower than that of expansion valves.

[0082] By controlling the flow rate of refrigerant through the second capillary tube 2520 using the solenoid valve 2530, precise temperature regulation can be achieved to meet the needs of medical tissue freezing 1220.

[0083] For example, the required temperature for medical tissue 1220 is -10 degrees Celsius. When the cold air temperature is higher than -10 degrees Celsius, the solenoid valve 2530 is opened; when the cold air temperature is lower than -14 degrees Celsius, the solenoid valve 2530 is closed.

[0084] Furthermore, the evaporator 2610 is a finned evaporator, comprising fins 2612 and a coil 2611. The evaporator 2610 is connected to the capillary tube and the compressor 2100 via the coil 2611. The medical tissue cooling system also includes an electric heating rod 2613 and a coil 2611 temperature sensor. The electric heating rod 2613 is inserted into the fins 2612. The coil 2611 temperature sensor is connected to the coil 2611 to detect the current temperature of the coil 2611. The controller is also connected to the electric heating rod 2613 and the coil 2611 temperature sensor to shut off the fan 2710 and close the solenoid valve 2530, and control the electric heating rod 2613 to heat the coil 2611, based on the following conditions: when the current coil 2611 temperature detected by the coil 2611 temperature sensor is lower than a predetermined coil 2611 temperature, and the temperature difference between the current coil 2611 temperature and the current cold air temperature detected by the cold air temperature sensor is greater than a first predetermined value. Finned evaporators are a known technology and will not be described in detail here.

[0085] like Figure 6 As shown, an electric heating rod 2613 is inserted into the fin 2612. Due to the very low cooling temperature, frost easily forms on the surface of the evaporator 2610. If frost forms, the cooling effect will be reduced, the wind resistance will increase, and the air volume will be reduced.

[0086] Heating the fins 2612 with an electric heating rod 2613 can dissolve the frost layer on the surface of the evaporator 2610.

[0087] The temperature sensor on coil 2611 can accurately and promptly determine the current temperature of coil 2611. When evaporator 2610 is frosted (fins 2612 and coil 2611 are frosted), the temperature of coil 2611 will be very low. However, due to the reduced air resistance and airflow of the cold air, the cooling efficiency will decrease, and the current cold air temperature will not be high. In order to maintain the predetermined cold air temperature, the temperature of evaporator 2610 will continue to decrease, thus creating a vicious cycle.

[0088] When the current temperature of coil 2611 detected by the coil 2611 temperature sensor is lower than the predetermined coil 2611 temperature, and the temperature difference between the current coil 2611 temperature and the current cold air temperature detected by the cold air temperature sensor is greater than a first predetermined value, it indicates that the frosting phenomenon on the evaporator 2610 is already severe, and the low temperature of the evaporator 2610 cannot generate sufficiently cold air. At this time, the controller shuts off the fan 2710 and controls the electric heating rod 2613 to work, which can quickly raise the temperature of the evaporator 2610. The fan 2710 is turned off to maintain the high temperature of the evaporator 2610 and prevent the high temperature of the evaporator 2610 from being transferred to the object to be cooled. Moreover, this process closes the solenoid valve 2530 to prevent excessive refrigerant from flowing into the evaporator 2610 and causing difficulties in defrosting.

[0089] Further, the medical tissue cooling system further comprises a semiconductor refrigeration sheet and a coil 2611 temperature sensor. The heating surface of the semiconductor refrigeration sheet is attached to the fin 2612. The coil 2611 temperature sensor is connected to the coil 2611 to detect the current coil 2611 temperature of the coil 2611. The controller is further connected to the semiconductor refrigeration sheet to control the semiconductor refrigeration sheet to work according to that the temperature difference between the current coil 2611 temperature and the current cold air temperature detected by the cold air temperature sensor is greater than a second predetermined value, and the first predetermined difference is greater than the second predetermined difference.

[0090] The heating surface of the semiconductor refrigeration sheet is attached to the fin 2612, which can warm the fin 2612 and reduce the frost on the fin 2612. Although the heating surface of the semiconductor refrigeration sheet can increase the temperature of the evaporator 2610 and increase the temperature of the cold air, the cooling surface of the semiconductor refrigeration sheet is suspended, and the cold air can blow through the cooling surface of the semiconductor refrigeration sheet to reduce the temperature. In summary, the semiconductor refrigeration sheet has a relatively small effect on the temperature of the cold air. Therefore, using the semiconductor refrigeration sheet can reduce the frost on the evaporator 2610 and has a relatively small effect on the temperature of the cold air, and the fan 2710 can continue to work.

[0091] The controller controls the semiconductor refrigeration sheet to work according to that the temperature difference between the current coil 2611 temperature and the current cold air temperature detected by the cold air temperature sensor is greater than a second predetermined value. The second predetermined difference can be determined according to the difference between the current coil 2611 temperature and the current cold air temperature in the case of no frost. That is, the temperature of the cold air blowing through the evaporator 2610 after frosting is higher than the temperature of the cold air blowing through the evaporator 2610 without frosting, which indicates that the coil 2611 has at least slightly frosted, and the semiconductor refrigeration sheet is turned on to defrost.

[0092] The first predetermined difference is greater than the second predetermined difference, which can preferentially use the semiconductor refrigeration sheet to defrost before the electric heating rod 2613 is started, so as to avoid the case that the electric heating rod 2613 has a large effect on the cold air. Moreover, when the semiconductor refrigeration sheet is not sufficient to defrost, the frost layer becomes thicker, the temperature of the coil 2611 is still low, and the temperature difference between the current coil 2611 temperature and the current cold air temperature detected by the cold air temperature sensor exceeds the first predetermined difference and the second predetermined difference, the electric heating rod 2613 and the semiconductor refrigeration sheet work synchronously, which can further improve the efficiency of defrosting the frost layer.

[0093] In some embodiments of the present invention, the medical tissue cooling system further includes a gas-liquid regenerator 2900. The gas-liquid regenerator 2900 includes a first channel and a second channel that are independent of each other and adjacent to each other. The first channel and the second channel are capable of heat exchange. The two ends of the first channel are respectively connected to an evaporator 2610 and a compressor 2100. The evaporator 2610 is connected to the compressor 2100 through the first channel. The two ends of the second channel are respectively connected to a condenser 2300 and a capillary tube. The condenser 2300 is connected to the capillary tube through the second channel.

[0094] like Figure 4 and Figure 7 As shown, the liquid refrigerant in the condenser 2300 flows to the capillary tube through the gas-liquid regenerator 2900, and the refrigerant in the evaporator 2610 flows to the compressor 2100 through the gas-liquid regenerator 2900.

[0095] Because the medical tissue 1220 requires a very low temperature, the refrigerant in the evaporator 2610 is also very cold and flows directly to the compressor 2100. The compressor 2100 is relatively inefficient at compressing the cold refrigerant to form a high-temperature, high-pressure gaseous refrigerant, and liquid refrigerant is prone to flowing into the compressor 2100, causing liquid slugging.

[0096] The liquid refrigerant passing through the condenser 2300 and then through the gas-liquid regenerator 2900 absorbs heat from the low-temperature gaseous refrigerant passing through the evaporator 2610. This lowers the temperature of the refrigerant flowing into the capillary tube and raises the temperature of the refrigerant flowing into the compressor 2100. The lower-temperature refrigerant then flows through the capillary tube into the evaporator 2610, increasing refrigeration efficiency. The higher-temperature refrigerant then flows into the compressor 2100, increasing the compressor's compression efficiency. Furthermore, the increased temperature of the refrigerant forms a gaseous refrigerant, preventing liquid refrigerant from flowing into the compressor 2100 and causing liquid slugging.

[0097] In some embodiments of the present invention, the medical tissue cooling system further includes a liquid storage tank 2420, a dryer filter 2410, a gas-liquid separator 2220, and an oil separator 2210. A first end of the liquid storage tank 2420 is connected to a second channel of a gas-liquid regenerator 2900. A first end of the dryer filter is connected to a second end of the liquid storage tank 2420, and its second end is connected to a capillary tube. The second channel of the gas-liquid regenerator 2900 is connected to the capillary tube through the liquid storage tank 2420 and the dryer filter 2410. The first channel of the gas-liquid regenerator 2900 is connected to a compressor 2100 through the gas-liquid separator 2220. The compressor 2100 is connected to a condenser 2300 through the oil separator 2210.

[0098] The refrigerant can be filtered by the dryer filter 2410 to prevent clogging of the capillary tube or expansion valve.

[0099] The liquid storage tank 2420 can store more refrigerant, avoiding frequent replenishment of refrigerant.

[0100] The refrigerant flowing through the gas-liquid heat exchanger 2900 flows into the gas-liquid separator 2220, further separating the liquid refrigerant, avoiding the liquid refrigerant flowing into the compressor 2100.

[0101] The gaseous refrigerant flowing through the compressor 2100 passes through the oil separator 2210, which can filter out the oil in the refrigerant.

[0102] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A medical tissue cooling system, characterized by The medical tissue cooling system comprises: a track for continuously conveying a plurality of medical tissues to be cooled, the track being horizontally arranged; a wind cover covering the track so that the tissues to be cooled can pass through the wind cover, the wind cover being horizontally arranged and having an upper surface and a lower surface respectively formed with an air inlet joint and an air outlet joint; a cold air machine comprising an air outlet guide and an air return guide, the air outlet guide being connected to the air inlet joint through a first pipeline, the air return guide being connected to the air outlet joint through a second pipeline, the cold air machine being capable of generating cold air so that cold air can flow from the air outlet guide to the air inlet joint and from the air outlet joint to the air return guide, the track being formed as a ring track or a C-shaped track, the wind cover comprising: a wind cover body covering a circular arc portion of one end of the track and following the track to be formed as a circular arc, the wind cover body forming a cooling cavity; a plurality of air inlet joints arranged on the outer side of the lower surface of the wind cover body and spaced apart along the extension direction of the wind cover body; a plurality of air outlet joints arranged on the inner side of the upper surface of the wind cover body and spaced apart along the extension direction of the wind cover body; the air inlet joint being formed as an air inlet joint pipe extending into the interior of the wind cover body and having a first bevel cut at the top end facing the upper surface of the track; the air outlet joint being formed as an air outlet joint pipe extending into the interior of the wind cover body and having a second bevel cut at the bottom end facing the upper surface of the track.

2. The medical tissue cooling system according to claim 1, wherein one end of the outer side of the air outlet guide is formed with a plurality of first air pipes corresponding to the plurality of air inlet joints, and the plurality of first air pipes are connected to the plurality of air inlet joints through the plurality of first pipelines; one end of the outer side of the air return guide is formed with a plurality of second air pipes corresponding to the plurality of air outlet joints, and the plurality of second air pipes are connected to the plurality of air outlet joints through the plurality of second pipelines.

3. The medical tissue cooling system of claim 2, wherein, The cold air machine further comprises: a compressor capable of compressing refrigerant; a condenser receiving refrigerant from the compressor and cooling the refrigerant; a capillary pipe receiving refrigerant from the condenser and throttling and depressurizing the refrigerant; an evaporator having a first end receiving refrigerant from the capillary pipe and a second end delivering the refrigerant to the compressor; a housing accommodating the evaporator and having opposite sides respectively communicating with the air outlet guide and the air return guide; a fan arranged between the housing and the air outlet guide or between the housing and the air return guide, the fan having a wind direction from the air return guide to the air outlet guide.

4. The medical tissue cooling system of claim 3, wherein, The capillary tube comprises a first capillary tube and a second capillary tube, two ends of the first capillary tube are connected with the condenser and the evaporator respectively, a first end of the second capillary tube is connected with the condenser through an electromagnetic valve, and a second end of the second capillary tube is connected with the evaporator. A cold air temperature sensor is arranged in the air cover or the shell to detect a current cold air temperature. A controller is configured to open the electromagnetic valve when the current cold air temperature is higher than a first predetermined temperature, and to close the electromagnetic valve when the current cold air temperature is lower than a second predetermined temperature.

5. The medical tissue cooling system of claim 4, wherein, The evaporator is a finned evaporator, the evaporator comprises fins and a coil pipe, the evaporator connects the capillary tube and the compressor through the coil pipe, and the medical tissue cooling system further comprises: An electric heating rod is inserted into the fins. A coil pipe temperature sensor is connected with the coil pipe to detect a current coil pipe temperature of the coil pipe. The controller is further connected with the electric heating rod and the coil pipe temperature sensor, and is configured to close the fan and the electromagnetic valve, and to control the electric heating rod to heat when the current coil pipe temperature detected by the coil pipe temperature sensor is lower than a predetermined coil pipe temperature, and a temperature difference between the current coil pipe temperature and a current cold air temperature detected by the cold air temperature sensor is greater than a first predetermined value.

6. The medical tissue cooling system of claim 5, wherein, The medical tissue cooling system further comprises: A semiconductor refrigeration sheet, a heating surface of the semiconductor refrigeration sheet is attached to the fins. A coil pipe temperature sensor is connected with the coil pipe to detect a current coil pipe temperature of the coil pipe. The controller is further connected with the semiconductor refrigeration sheet, and is configured to control the semiconductor refrigeration sheet to work when the current coil pipe temperature is lower than a predetermined coil pipe temperature, and a temperature difference between the current coil pipe temperature and a current cold air temperature detected by the cold air temperature sensor is greater than a second predetermined value, the first predetermined value is greater than the second predetermined value.

7. The medical tissue cooling system of claim 6, wherein, The medical tissue cooling system further comprises: A gas-liquid heat exchanger, the gas-liquid heat exchanger comprises a first channel and a second channel which are independent and adjacent to each other, the first channel and the second channel can exchange heat, two ends of the first channel are connected with the evaporator and the compressor respectively, the evaporator is connected with the compressor through the first channel, and two ends of the second channel are connected with the condenser and the capillary tube respectively, the condenser is connected with the capillary tube through the second channel.

8. The medical tissue cooling system of claim 7, wherein, The medical tissue cooling system further comprises: A liquid storage tank, a first end of the liquid storage tank is connected with the second channel of the gas-liquid heat exchanger; A drying filter, a first end of the drying filter is connected with a second end of the liquid storage tank, and a second end of the drying filter is connected with the capillary tube, the second channel of the gas-liquid heat exchanger is connected with the capillary tube through the liquid storage tank and the drying filter; A gas-liquid separator, the first channel of the gas-liquid heat exchanger is connected with the compressor through the gas-liquid separator; An oil separator, the compressor is connected with the condenser through the oil separator.

Images