Plasma instant freezer based on air expansion refrigeration

Abstract

The utility model discloses a plasma instant freezer based on air expansion refrigeration, which comprises a quick-freezing box body and an air expansion refrigeration system, a plurality of hook pieces for hanging plasma bags are arranged in an inner cavity of the quick-freezing box body, and the quick-freezing box body is provided with an outer door and an inner door for rotatably sealing the inner cavity; a plurality of inner doors are arranged at the entrance and exit of the inner cavity; an air outlet hole and an air return hole of the air expansion refrigeration system are respectively formed in two opposite side surfaces of the inner cavity; the air expansion refrigeration system comprises a compressor, a heat exchanger, a heat regenerator and an expansion machine. The refrigeration structure is simple, the cost is low when air serves as refrigerant, and the problem of refrigerant leakage does not need to be worried about; when the plasma bag is taken and placed, the outer door and inner door structure effectively reduces the influence of external environment gas on the internal environment of the quick-freezing box body.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma freezing, in particular to a plasma quick-freezing machine based on air expansion refrigeration. Background Art

[0002] In order to ensure the quality of plasma, it is necessary to quickly separate the plasma after blood collection and put it in a low-temperature environment for quick freezing. The existing plasma quick freezing method uses liquid nitrogen quick freezing technology, or special refrigeration equipment to provide a low-temperature quick freezing box that meets the requirements for plasma bags. However, the existing plasma quick freezing equipment often uses multi-stage cascade steam compression refrigeration technology, which has a complex structure and high working pressure, and there are safety hazards such as refrigerant leakage; and the internal space of the existing quick freezing box is not conducive to the homogenization of the low-temperature gas. When taking out and putting in the plasma bag, it is easy to cause a large amount of low-temperature gas in the quick freezing box to leak out, causing waste. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the above-mentioned prior art and provide a plasma quick-freezing machine based on air expansion refrigeration to solve the problems of refrigerant leakage in the existing plasma quick-freezing equipment and the significant impact of the taking and placing operation on the environment inside the quick-freezing box.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A plasma quick-freezing machine based on air expansion refrigeration comprises a quick-freezing box and a refrigeration system. The inner cavity of the quick-freezing box is provided with a plurality of hooks for hanging plasma bags. The quick-freezing box is provided with an outer door and an inner door for rotating and closing the inner cavity. The entrance and exit of the inner cavity are arranged with a plurality of the inner doors. The air outlet and the air return hole of the refrigeration system are arranged on two opposite sides of the inner cavity.

[0006] Furthermore, a plurality of the air outlet holes and the air return holes are arranged correspondingly up and down; and the number of the air outlet holes and the air return holes decreases layer by layer from top to bottom.

[0007] Furthermore, the refrigeration system is an air expansion refrigeration system, which includes a compressor, a heat exchanger, a regenerator, and an expander; the air outlet of the compressor is connected to the heat exchanger, the first air inlet of the regenerator, and the inlet of the expander in sequence; the air outlet of the expander is connected to the air outlet hole; the air return hole is connected to the second air inlet of the regenerator and the inlet of the compressor in sequence.

[0008] Furthermore, the heat exchanger is air-cooled.

[0009] Furthermore, the air expansion refrigeration system also includes a dehumidifier, valve one, valve two, and valve four; the air outlet of the expander is connected to valve one and valve two respectively; the first inlet of the dehumidifier is connected to valve two; the outlet of the dehumidifier is connected to valve four; valve one and valve four are both connected to the air outlet.

[0010] Furthermore, the dehumidifier includes a wire mesh demister, a cylinder, and a fixed rod; the wire mesh demister is arranged as a partition in the cylinder, and the wire mesh demister is located between the outlet and the first inlet of the dehumidifier; a limit baffle is provided on the inner wall of the cylinder, the upper part of the wire mesh demister is contacted with the limit baffle for limiting position, and the fixed rod supports the lower part of the wire mesh demister.

[0011] Furthermore, the dehumidifier is provided with a second inlet corresponding to the first inlet position, and the second inlet is connected to the outside through valve three; the outlet of the dehumidifier is connected to the inlet of the compressor through valve five.

[0012] Furthermore, a pressure sensor is provided on the cylinder; the pressure sensor is used to monitor the outlet pressure of the dehumidifier; the valve one, valve two, valve three, valve four and valve five are electric valves electrically connected to the controller.

[0013] Furthermore, the air expansion refrigeration system includes temperature, pressure sensors, and humidity sensors. The temperature and pressure sensors are used to monitor the temperature and pressure of the expander outlet, compressor inlet, and heat exchanger inlet; the humidity sensor is used to monitor the gas humidity at the compressor inlet.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model provides a plasma quick-freezing machine based on air expansion refrigeration, including a quick-freezing box and a refrigeration system for cooling the quick-freezing box; the quick-freezing box is provided with an outer door and an inner door, and a plurality of independently opened inner doors are arranged, and the inner cavity of the quick-freezing box is completely closed by the outer door. The outer door and the inner door form a double-layer closed structure. When taking or placing a plasma bag, after opening the outer door, only the inner door corresponding to the position where the plasma bag needs to be taken out or the position where the plasma bag needs to be placed needs to be opened. The remaining inner doors still play a role in blocking the leakage of low-temperature gas, reducing the range of the plasma quick-freezing machine affected by the external environment gas and reducing the heat load of the system.

[0016] 2. The refrigeration system adopts an air expansion refrigeration system, including a compressor, a heat exchanger, a regenerator, and an expander. The gas inlet and outlet of the quick-freezing box are connected in series between the gas outlet of the expander and the inlet of the compressor. The refrigeration structure is simple, and no defrosting is required. The cooling rate in the quick-freezing box is fast, which is conducive to the plasma quick-freezing machine to quickly reach the target temperature. Air is used as the refrigerant, which is low in cost and there is no need to worry about refrigerant leakage.

[0017] 3. Arrange the air outlet and air return holes in the quick-freezing box left and right and up and down, and reduce the number of air holes from top to bottom layer by layer, so that more low-temperature air enters from the upper part of the quick-freezing box and converges downward; effectively control the amount of air entering and discharged from the upper and lower areas of the quick-freezing box, which is conducive to the uniform distribution of low-temperature air in the quick-freezing box, making its internal temperature uniform and ensuring the quick-frozen storage quality of the plasma bag.

[0018] 4. A dehumidifier is provided in the air expansion refrigeration system. The dehumidifier is connected as a bypass between the air outlet of the expander and the quick freezing chamber. The dehumidification work is started through valve control to ensure that the humidity of the circulating gas in the plasma quick freezing machine meets the requirements.

[0019] 5. The dehumidifier is provided with an inlet connected to the outside through a valve, and the outlet of the dehumidifier is connected to the inlet of the compressor through a valve; the air replenishment process is started by valve control so that the humidity of the circulating gas in the plasma quick freezer meets the requirements, thereby ensuring a good quick-freezing storage environment in the plasma quick freezer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 It is the system principle diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the quick-freezing box of the utility model;

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0024] Figure 4 It is a schematic diagram of the internal structure of the dehumidifier of the utility model.

[0025] In the figure, 1. quick-freezing box body; 2. hook part; 3. outer door; 4. inner door; 51. air outlet; 52. air return hole; 53. compressor; 54. heat exchanger; 55. regenerator; 56. expander; 6. dehumidifier; 61. first inlet; 62. outlet; 63. wire mesh demister; 64. cylinder; 65. fixing rod; 66. limit baffle; 67. second inlet; 101. valve one; 102. valve two; 103. valve three; 104. valve four; 105. valve five. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments.

[0027] like Figure 1-3As shown, the utility model provides a plasma quick freezing machine based on air expansion refrigeration, comprising a quick freezing box 1 and a refrigeration system. The inner cavity of the quick freezing box 1 is provided with a plurality of hooks 2 for hanging plasma bags, and the quick freezing box 1 is provided with an outer door 3 and an inner door 4 for rotating and closing the inner cavity; a plurality of inner doors 4 are arranged at the entrance and exit of the inner cavity; preferably, the positions of the plurality of inner doors 4 correspond to the positions of the plurality of hooks 2. An air outlet 51 and an air return hole 52 of the refrigeration system are arranged on two opposite sides of the inner cavity.

[0028] like Figure 2 , 3 As shown, a plurality of air outlet holes 51 and air return holes 52 are arranged correspondingly up and down; the number of air outlet holes 51 and air return holes 52 decreases layer by layer from top to bottom, which is beneficial to the uniformity of low-temperature air in the quick-freezing box 1.

[0029] like Figure 1 As shown, preferably, the refrigeration system is arranged at the bottom of the quick freezing box 1; the refrigeration system is an air expansion refrigeration system, and the air expansion refrigeration system includes a compressor 53, a heat exchanger 54, a regenerator 55, and an expander 56; the air outlet of the compressor 53 is connected to the heat exchanger 54, the first air inlet of the regenerator 55, and the inlet of the expander 56 in sequence; preferably, the heat exchanger 54 is air-cooled. The air outlet of the expander 56 is connected to the air outlet 51; the air return hole 52 is connected to the second air inlet of the regenerator 55 and the inlet of the compressor 53 in sequence.

[0030] like Figure 1 As shown, the air expansion refrigeration system also includes a dehumidifier 6, a valve one 101, a valve two 102, and a valve four 104; the air outlet of the expander 56 is respectively connected to the valve one 101 and the valve two 102; the first inlet 61 of the dehumidifier 6 is connected to the valve two 102; the outlet 62 of the dehumidifier 6 is connected to the valve four 104; the valve one 101 and the valve four 104 are both connected to the air outlet 51.

[0031] like Figure 4 As shown, the dehumidifier 6 includes a wire mesh demister 63, a cylinder 64, and a fixing rod 65; the wire mesh demister 63 is arranged as a partition in the cylinder 64, and the wire mesh demister 63 is located between the outlet 62 and the first inlet 61 of the dehumidifier 6; a limit baffle 66 is provided on the inner wall of the cylinder 64, the upper part of the wire mesh demister 63 is in contact with the limit baffle 66 for limiting, and the fixing rod 65 supports the lower part of the wire mesh demister 63.

[0032] like Figure 4 As shown, the dehumidifier 6 is provided with a second inlet 67 corresponding to the position of the first inlet 61 , and the second inlet 67 is connected to the outside through a valve three 103 ; the outlet 62 of the dehumidifier 6 is connected to the inlet of the compressor 53 through a valve five 105 .

[0033] A pressure sensor is provided on the cylinder 64; the pressure sensor is used to monitor the pressure of the outlet 62 of the dehumidifier 6; valve 1 101, valve 2 102, valve 3 103, valve 4 104, and valve 5 105 are electric valves electrically connected to the controller. The controller controls the opening and closing of each valve to complete the automatic control of the system.

[0034] The air expansion refrigeration system also includes temperature and pressure sensors, which are used to monitor the temperature and pressure of the air outlet of the expander 56, the inlet of the compressor 53, and the inlet of the heat exchanger 54. The compressor 53, the heat exchanger 54, the temperature and pressure sensors are electrically connected to the controller for system data testing and controlling the automatic operation of the entire system.

[0035] The operation process of the plasma quick freezer based on air expansion refrigeration is as follows:

[0036] S1. Start-up operation process: control valve two 102 and valve four 104 to open, valve one 101, valve three 103 and valve five 105 to close; control the compressor to start, so that the air circulates in the closed system as gas; the low-temperature air discharged from the outlet of the expander 56 passes through valve two 102, dehumidifier 6 and valve four 104 to enter the quick-freezing box 1, and then passes through the regenerator 55 to return to the compressor 53; the controller monitors the humidity in the circulation system through the humidity sensor, and when it is determined that the humidity value is less than the set value, controls valve one 101 to open, valve two 102 and valve four 104 to close, so that the system enters the normal operation process.

[0037] S2, normal operation process: control valve 1 101 to open, valve 2 102 and valve 4 104 to close, low-temperature air discharged from the air outlet of the expander 56 directly enters the quick-freezing box 1 to cool it; then returns to the compressor 53 through the regenerator 55 to carry out the next cycle.

[0038] S3, air replenishment operation process: the controller controls the opening and closing of the air replenishment operation process according to the pressure value measured by the pressure sensor on the dehumidifier 6; during the air replenishment operation process, the valve one 101 is controlled to be closed, and the valve two 102, the valve three 103, the valve four 104, and the valve five 105 are all opened; the low-temperature air discharged from the air outlet of the expander 56 passes through the valve two 102, the dehumidifier 6, and the valve four 104 and enters the quick-freezing box 1; at the same time, the external air passes through the valve three 103, the dehumidifier 6, and the valve five 105 and enters the system for circulation.

[0039] In the description of the present invention, terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", and "horizontal" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words for the convenience of describing the present invention, and do not necessarily require the present invention to be constructed or operated in a specific direction. They do not specifically refer to any component or element, and cannot be understood as limitations on the present invention.

[0040] The terms "connected" and "connection" in the present invention should be understood in a broad sense. For example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] The embodiments of the utility model are only a part of the embodiments, not all of the embodiments. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent. This specification is described in accordance with the implementation methods only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A plasma quick-freezing machine based on air expansion refrigeration, comprising a quick-freezing box (1) and a refrigeration system, wherein the inner cavity of the quick-freezing box (1) is provided with a plurality of hooks (2) for hanging plasma bags, characterized in that: The quick freezing box (1) is provided with an outer door (3) and an inner door (4) for rotating and sealing the inner cavity; a plurality of the inner doors (4) are arranged at the entrance and exit of the inner cavity; and an air outlet (51) and an air return hole (52) of the refrigeration system are arranged on two opposite sides of the inner cavity.

2. A plasma quick freezer based on air expansion refrigeration as claimed in claim 1, characterized in that: A plurality of the air outlet holes (51) and the air return holes (52) are arranged correspondingly in the upper and lower parts; the number of the air outlet holes (51) and the air return holes (52) decreases layer by layer from top to bottom.

3. A plasma quick freezer based on air expansion refrigeration as claimed in claim 1, characterized in that: The refrigeration system is an air expansion refrigeration system, which includes a compressor (53), a heat exchanger (54), a regenerator (55), and an expander (56); the air outlet of the compressor (53) is connected to the heat exchanger (54), the first air inlet of the regenerator (55), and the inlet of the expander (56) in sequence; the air outlet of the expander (56) is connected to the air outlet hole (51); the air return hole (52) is connected to the second air inlet of the regenerator (55) and the inlet of the compressor (53) in sequence.

4. A plasma quick freezer based on air expansion refrigeration as claimed in claim 3, characterized in that: The heat exchanger (54) is of air-cooled type.

5. A plasma quick freezer based on air expansion refrigeration as claimed in claim 4, characterized in that: The air expansion refrigeration system further comprises a dehumidifier (6), a valve one (101), a valve two (102), and a valve four (104); the air outlet of the expander (56) is respectively connected to the valve one (101) and the valve two (102); the first inlet (61) of the dehumidifier (6) is connected to the valve two (102); the outlet (62) of the dehumidifier (6) is connected to the valve four (104); the valve one (101) and the valve four (104) are both connected to the air outlet (51).

6. A plasma quick freezer based on air expansion refrigeration as claimed in claim 5, characterized in that: The dehumidifier (6) comprises a wire mesh demister (63), a cylinder (64), and a fixing rod (65); the wire mesh demister (63) is arranged as a partition in the cylinder (64), and the wire mesh demister (63) is located between the outlet (62) and the first inlet (61) of the dehumidifier (6); a limit baffle (66) is arranged on the inner wall of the cylinder (64), the upper part of the wire mesh demister (63) contacts the limit baffle (66) for limit, and the fixing rod (65) supports the lower part of the wire mesh demister (63).

7. A plasma quick freezer based on air expansion refrigeration as claimed in claim 6, characterized in that: The dehumidifier (6) is provided with a second inlet (67) corresponding to the position of the first inlet (61), and the second inlet (67) is connected to the outside through a valve three (103); the outlet (62) of the dehumidifier (6) is connected to the inlet of the compressor (53) through a valve five (105).

8. A plasma quick freezer based on air expansion refrigeration as claimed in claim 7, characterized in that: A pressure sensor is provided on the cylinder (64); the pressure sensor is used to monitor the pressure of the outlet (62) of the dehumidifier (6); the valve one (101), valve two (102), valve three (103), valve four (104), and valve five (105) are electric valves electrically connected to the controller.

9. A plasma quick freezer based on air expansion refrigeration as claimed in claim 3, characterized in that: The air expansion refrigeration system includes temperature and pressure sensors and humidity sensors. The temperature and pressure sensors are used to monitor the temperature and pressure of the air outlet of the expander (56), the inlet of the compressor (53), and the inlet of the heat exchanger (54); the humidity sensor is used to monitor the gas humidity at the inlet of the compressor (53).

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