JP2023068504A - Frozen plasma thawing device - Google Patents

Abstract

To provide a frozen plasma thawing device capable of suppressing positional deviation of a frozen plasma bag which is set on an upper side heat plate for safely utilizing the device.SOLUTION: A device 1 comprises: a body 2; an oscillation arm 3; an upper lid 5; an upper side heat plate 6; a lower side heat plate 7, in which the upper lid is displaced between a first state S1 for opening the upper face side of the body by oscillation of the oscillation arm, and a second state S2 for covering the upper face side of the body, the upper lid is displaced to the second state from the first state for holding a frozen plasma bag 9 between the upper side heat plate and the lower side heat plate, and then the upper lid is oscillated around a support shaft 4, for thawing the frozen plasma stored in the frozen plasma bag between the heated upper side heat plate and the lower side heat plate. In the device, an oscillation frequency of the upper lid is 10-60 times/minute.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a frozen plasma thawing device, and more particularly to a frozen plasma thawing device for thawing frozen plasma stored in a frozen plasma bag.

A conventional frozen plasma thawing apparatus includes a main body, a rocking arm that is rockably supported by the body, an upper lid that is rockably supported by the rocking arm around a horizontal support shaft, and a lower surface of the upper lid. An upper hot plate provided and a lower hot plate provided on the upper surface side of the main body are provided, and the upper lid covers the upper surface side of the main body in a first state in which the upper surface side of the main body is opened by swinging of the swing arm. and the second state, the upper lid is displaced from the first state to the second state, the frozen plasma bag is sandwiched between the upper and lower hot plates, and the upper lid is swung around the support shaft. Thus, it is known that frozen plasma stored in a frozen plasma bag is thawed between heated upper and lower hot plates (see, for example, Patent Documents 1 and 2).

JP 2013-252204 A JP 2018-061719 A

However, in the conventional frozen plasma thawing apparatus, the optimum rocking condition of the upper lid for uniformly and quickly thawing the frozen plasma bag at the appropriate temperature has not been sufficiently studied, and it is required to determine it. .

In addition, in the conventional frozen plasma thawing apparatus, when the frozen plasma bag is set on the lower hot plate, the frozen bag is slippery and easily misaligned when placed on the lower hot plate. In addition, when the frozen plasma bag is set on the lower hot plate and then lowered to lower the swing arm to sandwich the frozen plasma bag between the upper and lower hot plates, the position of the bag is likely to be shifted, and the operator is forced to move. Careful attention was required when setting the device and before the device started operating. If this correction or monitoring is neglected and defrosting is continued with the positional deviation occurring, it will not be possible to defrost at an appropriate temperature (30 to 37°C), and in the worst case, the bag will hit the support (bearing) of the swing arm and normal operation will not be possible. Sometimes it disappeared.
In particular, when lowering the rocking arm after setting the frozen plasma bag on the lower hot plate, the upper lid with the built-in heater is heavy, and if it is lowered by its own weight, it will fall off at once. Nevertheless, a shock is given and positional deviation occurs. Since the frozen plasma bag is easily broken, there is a risk of damage such as breakage, and the operator's hand may be caught. Therefore, it was necessary for the operator to carefully lower the swing arm (that is, the upper lid) while always operating the handle.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a frozen plasma thawing apparatus capable of uniformly and quickly thawing a frozen plasma bag at an appropriate temperature by determining the optimum rocking conditions for the top cover. With the goal.
In addition to the above object, it is another object of the present invention to provide a frozen plasma thawing apparatus that can operate safely by suppressing displacement of the frozen plasma bag set on the upper heating plate. do.

In order to solve the above-mentioned problems, the invention according to claim 1 comprises: a main body; a swing arm supported swingably by the main body; An upper cover to be supported, an upper hot plate provided on the lower surface side of the upper cover, and a lower hot plate provided on the upper surface side of the main body, wherein the upper cover moves the main body by swinging the swing arm. is displaced between a first state in which the upper surface side of the main body is opened and a second state in which the upper surface side of the main body is covered, and the upper lid is displaced from the first state to the second state to displace the upper hot plate and the lower The frozen plasma bag stored in the frozen plasma bag is held between the upper and lower hot plates by sandwiching the frozen plasma bag between the upper and lower hot plates and swinging the upper lid around the support shaft. A frozen plasma thawing apparatus for thawing plasma, wherein the upper cover is oscillated 10 to 60 times/min.
The invention according to claim 2 is the invention according to claim 1, wherein the upper lid is swung around the support shaft by pushing up a lower surface on one end side of the longitudinal direction perpendicular to the support shaft with an elevating member. , the ratio (L1:L2) of the distance (L1) between the support shaft and the other end of the upper cover in the longitudinal direction and the distance (L2) between the support shaft and the one end of the upper cover in the longitudinal direction is 45: The gist is that it is 55 to 25:75.
The invention according to claim 3 is based on the invention according to claim 1 or 2, and when the top cover is displaced from the first state to the second state, the freezing point set on the lower hot plate is The gist of the invention is that a damper mechanism is provided for damping collision of the upper hot plate against the plasma bag.
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein a flexible member is provided on the surface of the lower hot plate according to the size of the frozen plasma bag. The gist is that

According to the apparatus for thawing frozen plasma of the present invention, the number of rocking motions of the top cover is 10 to 60 times/minute. As a result, the frozen plasma bag can be uniformly and rapidly thawed at an appropriate temperature by establishing the optimum rocking conditions (number of times of rocking) of the upper lid.
Further, the upper cover is swung around the support shaft by pushing up the lower surface of the upper cover on one end side in the longitudinal direction orthogonal to the support shaft by an elevating member. When the ratio (L1:L2) between the interval (L1) and the interval (L2) between the support shaft and the one end of the upper lid in the longitudinal direction is 45:55 to 25:75, the optimum rocking motion of the upper lid is achieved. By establishing the conditions (position of the support shaft), the frozen plasma bag can be uniformly and quickly thawed at an appropriate temperature.
Further, a damper mechanism is provided for damping collision of the upper hot plate with the frozen plasma bag set on the lower hot plate when the upper lid is displaced from the first state to the second state. In this case, when the frozen plasma bag is placed on the lower hot plate and the swing arm is lowered to sandwich the frozen plasma bag between the upper and lower hot plates, the upper side of the frozen plasma bag is moved by the damper mechanism. The collision of the hot plate is buffered. As a result, displacement of the frozen plasma bag and damage to the frozen plasma can be suppressed, and danger to the operator can be eliminated.
Furthermore, when a flexible member is provided on the surface of the lower hot plate according to the size of the frozen plasma bag, the flexible member can be used when setting the frozen plasma bag on the lower hot plate. The member serves as a mark to enable accurate position confirmation, and the positioning effect of the flexible member prevents the frozen plasma bag from slipping. Furthermore, when the frozen plasma bag is set on the lower hot plate and the swing arm is lowered to sandwich the frozen plasma bag between the upper and lower hot plates, the positioning effect of the flexible member freezes the plasma bag. Sliding of the plasma bag is suppressed. As a result, displacement of the frozen plasma bag set on the upper hot plate can be suppressed, and the device can be operated safely.

The present invention will be further described in the following detailed description by way of non-limiting examples of exemplary embodiments according to the invention and with reference to the mentioned drawings, wherein like reference numerals indicate Similar parts are shown throughout the several figures.
1 is a longitudinal sectional view of a frozen plasma thawing apparatus according to an example; FIG. FIG. 2 is a sectional view taken along the line II-II of FIG. 1; 1 is a perspective view of a frozen plasma thawing device; FIG. FIG. 4 is an explanatory diagram for explaining a flexible member according to an embodiment, (a) showing a form arranged in front and behind the surface of the lower hot plate, and (b) showing the front and rear of the surface of the lower hot plate; Fig. 3(c) shows a configuration in which they are arranged on the left and right sides, and (c) shows a configuration in which they are arranged in a ring shape on the surface of the lower hot plate. 5 is an enlarged cross-sectional view taken along line VV of FIG. 4; FIG. It is an explanatory view for explaining a damper mechanism concerning an example. 4 is a block diagram for explaining a control unit according to the embodiment; FIG. FIG. 4 is an explanatory diagram for explaining the action of the frozen plasma thawing device; FIG. 3 is an explanatory diagram for explaining the optimum rocking condition (position of the support shaft) of the upper lid of the frozen plasma thawing apparatus. FIG. 10 is an explanatory diagram for explaining a flexible member according to another embodiment, (a) showing a form arranged before and after the surface of the lower hot plate, and (b) showing the front and rear of the surface of the lower hot plate; Fig. 1 shows a form arranged to the left and right.

The material presented herein is intended to be illustrative and illustrative of the embodiments of the invention and is believed to be the most effective and readily understood description of the principles and conceptual features of the invention. It is stated for the purpose of providing what it seems. In this regard, no attempt is made to show structural details of the invention beyond those necessary for a fundamental understanding of the invention, and the description in conjunction with the drawings will illustrate some aspects of the invention. It will be clear to those skilled in the art how it is actually implemented.

As shown in FIGS. 1 and 2, a frozen plasma thawing apparatus 1 according to this embodiment includes a main body 2, a swing arm 3 supported by the main body 2 so as to be swingable about a horizontal axis, and a swing arm 3. a metal upper heating plate 6 provided on the lower surface side of the upper cover 5; and a metal lower heating plate provided on the upper surface side of the main body 2. a plate 7; The upper cover 5 is displaced between a first state S1 in which the upper surface side of the main body 2 is opened and a second state S2 in which the upper surface side of the main body 2 is covered by the swinging motion of the swing arm 3 . Then, by swinging the swing arm 3, the upper lid 5 is displaced from the first state S1 to the second state S2, the frozen plasma bag 9 is sandwiched between the upper hot plate 6 and the lower hot plate 7, and the upper lid 5 is lifted. By rocking around the support shaft 4, the frozen plasma stored in the frozen plasma bag 9 is thawed between the heated upper and lower hot plates 6 and 7 (see FIG. 8).
In the apparatus 1 for thawing frozen plasma, the horizontal direction perpendicular to the axis of the support shaft 4 is defined as the front-rear direction A, and the horizontal direction along the axis of the support shaft 4 is defined as the left-right direction B.

The main body 2 is made of metal or resin and has a box shape. A hinge portion 11 is provided at the rear portion of the main body 2 to support the base end portion of the swing arm 3 so as to swing about the horizontal axis. A bracket 12 is provided inside the main body 2 to horizontally support the lower hot plate 7 on the upper surface side of the main body 2 . Further, on the upper surface side of the main body 2, an intermediate side of a swinging piece 15 is supported through a support 14 so as to be swingable. A kneading roller 16 (exemplified as an “elevating member” according to the present invention) is rotatably supported at one end of the swinging piece 15 so as to contact the bottom surface of the upper lid 5 at one end in the longitudinal direction. . Further, the other end side of the swinging piece 15 is connected to the rotating plate 18 via the connecting portion 17 . The rotating plate 18 is supported within the main body 2 so as to be rotatable about a horizontal axis. A drive shaft of a motor 19 provided inside the main body 2 is connected to the center side of the rotating plate 18 . Further, a power switch, a display panel, an alarm buzzer, a start switch 20 and the like are arranged on the front side of the main body 2 .

The swing arm 3 is made of a pipe material made of metal or resin. The swing arm 3 includes left and right arm portions 22 arranged on the sides of the upper lid 5, and a handle portion 23 arranged in front of the upper lid 5 and connecting tip ends of the left and right arm portions 22. ing. Base end portions of the left and right arm portions 22 are swingably supported by the main body 2 by the hinge portion 11 . Further, a support shaft 4 that supports the upper lid 5 so as to swing freely is arranged in a longitudinally intermediate portion of the left and right arm portions 22 . The support shaft 4 is arranged on a straight line connecting one end 5a and the other end 5b of the upper lid 5 in the longitudinal direction orthogonal to the support shaft 4. As shown in FIG. Furthermore, the ratio (L1:L2) between the distance L1 between the support shaft 4 and the other longitudinal end 5b of the upper lid 5 and the distance L2 between the support shaft 4 and the one longitudinal end 5a of the upper lid 5 is 30:70. ing.

The upper lid 5 is made of metal or resin and is formed in a plate shape. By gripping the handle portion 23 (or the arm portion 22) and swinging the swinging arm 3, the upper lid 5 is opened in a first state S1 in which the upper surface side of the main body 2 is opened and in a second state S1 in which the upper surface side of the main body 2 is covered. 2 state S2. Further, in the second state S2, the top lid 5 is swung around the support shaft 4 with the bottom surface at one end thereof pushed up by the lifting and lowering of the kneading rollers 16 driven by the motor 19 (see FIG. 8).

A plurality (two in the drawing) of the upper hot plates 6 are fixed to the lower surface of the upper lid 5 so as to be arranged side by side. A plurality of lower hot plates 7 (two in the figure) are fixed to the upper surface of the main body 2 .
In this embodiment, as the hot plates 6 and 7, cut or cast aluminum or copper plates having a thickness of 3 mm or more and 40 mm or less are used. The thicker the hot plates, the faster the thawing can be done. However, if the thickness exceeds 40 mm, the entire apparatus becomes heavy and unusable for the operator, and a large amount of power is required to be supplied to the heater 27, which will be described later. Become. Therefore, it is appropriate that the thickness of the hot plates 6 and 7 is 3 mm or more and 40 mm or less. Furthermore, examples of materials for the hot plates 6 and 7 include aluminum, copper, aluminum oxide, aluminum nitride, silicon carbide, silicon nitride, and carbon. Among these, from the viewpoint of high thermal conductivity, the hot plate is preferably made of an aluminum plate, a copper plate, or a composite plate in which an aluminum plate and a copper plate are bonded together.

Each of the hot plates 6 and 7 has a concave portion 25 formed on the surface thereof that contacts the frozen plasma bag 9 . The concave portion 25 is formed in a shallow bowl shape and has a depth of 1 mm to 5 mm. Furthermore, each of the hot plates 6 and 7 is provided with a heat insulating material 26 on the surface opposite to the surface in contact with the frozen plasma bag 9 . As the heat insulating material 26, for example, a fiber material such as glass wool or rock wool or a foam material such as urethane foam can be used.

Each of the hot plates 6 and 7 has a heater 27 that heats the hot plates 6 and 7 and a temperature sensor 28 that detects the temperature of the hot plates 6 and 7 . This heater 27 is embedded in the hot plates 6 and 7 . As the heater 27, for example, a sheathed heater, a cartridge heater, a planar heater, or the like can be used. Furthermore, the temperature sensor 28 is built in the central surface portion (for example, about 1 mm from the surface) of the hot plates 6 and 7 in contact with the frozen plasma bag 9 .

As shown in FIG. 7, the apparatus for thawing frozen plasma 1 includes a control unit 30 comprising a computer including a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), etc. (not shown). . The control unit 30 causes the CPU to execute each process corresponding to each means 31 and 32 while storing a program corresponding to each process of the temperature adjustment means 31 and the swing command means 32 in the ROM. The controller 30 is electrically connected to the heater 27, temperature sensor 28, motor 19 and start switch 20 described above.
The processing of each means 31 and 32 is realized by either or both of hardware and software.

When the start switch 20 is turned on, the control unit 30 drives the heater 27 and adjusts the electric power supplied by the temperature controller 33 based on the detection value of the temperature sensor 28 to heat the hot plates 6 and 7. Adjust the temperature to a predetermined temperature range (eg, 30° C.-40° C.). Further, the controller 30 (specifically, the rocking command means 32) drives the motor 19 to rock the upper lid 5 when a predetermined time T1 (for example, 5 minutes) has passed since the heater 27 started heating. move. Further, the control unit 30 stops driving the heater 27 and the motor 19 when a predetermined time T2 (T2>T1; for example, 10 minutes) has elapsed since the heater 27 started heating.

As shown in FIG. 3, a flexible member 35 is provided on the surface of the lower hot plate 7 (specifically, the concave portion 25) in accordance with the size of the frozen plasma bag 9. As shown in FIG. That is, on the surface of the lower hot plate 7, a flexible member 35 is provided at a position where the frozen plasma bag 9 is set to prevent the frozen plasma bag 9 from slipping. As a material for the flexible member 35, for example, flexible rubber such as silicone rubber or urethane rubber, or a soft resin member such as EVA or soft polyethylene can be used. Also, the flexible member 35 is arranged (specifically, embedded, attached, etc.) in a groove 36 formed on the surface of the lower hot plate 7 (see FIGS. 4A and 5). . Furthermore, the flexible member 35 is formed in an elongated shape and protrudes from the surface of the lower hot plate 7 at a predetermined height h. The width of the flexible member 35 is within 1 cm, and in particular, the height h is practically within 1 cm because if the height h exceeds the thickness of the frozen plasma bag 9, the rocking operation becomes ineffective.
The flexible member 35 can be attached to the surface of the lower hot plate 7 without providing the groove 36, although the flexible member 35 is arranged in the groove 36 to improve the mountability.

The flexible member 35 can be arranged, for example, in the front, back, front, back, left, and right, or around the entire circumference, depending on the size of the frozen plasma bag 9 (see FIG. 4). Specifically, by arranging an elongated flexible member 35 or a plurality of flexible members 35 along the left-right direction B on both sides of the lower hot plate 7 in the front-rear direction A, the frozen plasma bag 9 can be The flexible member 35 can be arranged so as to be in contact with the front and back of the (see FIGS. 4(a) and 10(a)). In addition, on both sides of the lower hot plate 7 in the front-rear direction A, an elongated flexible member 35 or a plurality of flexible members 35 are arranged along the left-right direction B. By arranging an elongated flexible member 35 or a plurality of flexible members 35 along the front-rear direction A on both sides in the direction B, the flexible members contact the front, rear, left, and right of the frozen plasma bag 9 . 35 can be arranged (see FIGS. 4(b) and 10(b)). Furthermore, by arranging the annular plastic member 35 on the lower hot plate 7, the flexible member 35 can be arranged so as to be in contact with the entire outer periphery of the frozen plasma bag 9 (see FIG. 4(c)).
As described above, by arranging the flexible members 35 at least on both sides in the front-rear direction A on the surface of the lower hot plate 7 , the flexible members are provided at least on the front-rear portion of the outer peripheral portion of the frozen plasma bag 9 . 35 are brought into contact with each other, and the positioning effect of the frozen plasma bag 9 by the flexible member 35 is enhanced.

As shown in FIG. 6, the apparatus for thawing frozen plasma 1 is set on the lower hot plate 7 when the upper lid 5 is displaced from the first state S1 to the second state S2 by swinging the swing arm 3. A damper mechanism 41 is provided for buffering (absorbing) the collision of the upper hot plate 7 against the frozen plasma bag 9 . The damper mechanism 41 is an extendable rod-shaped damper, and is provided between the swing arm 3 (specifically, the left and right arm portions 22 ) and the main body 2 . More specifically, the damper mechanism 41 includes a cylinder 42 that is pivotally supported by the main body 2 and a piston rod 43 that has a piston that slides in the cylinder 42 on one end side and that is pivotally supported on the swing arm 3 on the other end side. and have.
As the damper mechanism 41, for example, a rotary damper provided on the hinge portion 11 of the swing arm 3 may be employed.

Next, the operation of the apparatus for thawing frozen plasma 1 having the above configuration will be described.
In the first state S1 of the upper lid 5 (open state of the main body 2; see FIG. 3), the frozen plasma bag 9 is placed on the concave portion 25 of the lower hot plate 7 and set. At this time, the flexible member 35 can be used as a mark to set the frozen plasma bag 9 at an accurate position, and the positioning effect of the flexible member 35 prevents the frozen plasma bag 9 from slipping. Next, by lowering the swing arm 3 and changing the upper lid 5 from the first state S1 to the second state S2 (covering state of the main body 2; see FIG. 1), the upper hot plate 6 and the lower hot plate 7 are heated. A frozen plasma bag 9 is sandwiched between them. At this time, the collision of the upper hot plate 6 against the frozen plasma bag 9 is damped by the damper mechanism 41 (see FIG. 6).

Next, when the start switch 20 is turned on, the heater 27 is driven to heat the hot plates 6 and 7 . Then, the power supplied to the heater 27 is adjusted based on the detected value of the temperature sensor 28, and the temperature of the hot plates 6, 7 is adjusted to an appropriate temperature of 30 to 40.degree. By heating the hot plates 6 and 7, the thawing of the frozen plasma bag 9 is accelerated, and a part of the surface of the frozen plasma bag 9 is thawed, thereby increasing the contact area with the hot plates 6 and 7 and increasing the contact resistance. Furthermore, the positioning effect of the flexible member 35 is also added, and the displacement of the bag 9 is eliminated.

Thereafter, when a predetermined time T1 has elapsed from the start of heating by the heater 27, the motor 19 is driven to raise and lower the kneading rollers 16 to swing the upper lid 5 (see FIG. 8). At this time, the upper hot plate 6 is shaken up and down with respect to the lower hot plate 7 like a seesaw to squeeze the frozen plasma bag 9, so that the melted liquid in the bag 9 circulates and the thawing is accelerated. be. This thawing is performed in a dry manner without hot water bathing, which reduces the growth and contact of germs, is hygienic, and is performed accurately without variation. Thereafter, when a predetermined time T2 has passed since the heater 27 started heating, the driving of the heater 27 and the motor 19 is stopped, and the defrosting process is completed.

As described above, according to the frozen plasma thawing apparatus 1 of the present embodiment, the flexible member 35 is provided on the surface of the lower hot plate 7 in accordance with the size of the frozen plasma bag 9 . As a result, when the frozen plasma bag 9 is set on the lower hot plate 7, the flexible member 35 serves as a mark to enable accurate position confirmation. Slippage of the bag 9 is suppressed. Furthermore, when the frozen plasma bag 9 is placed on the lower hot plate 7 and the swing arm 3 is lowered to sandwich the frozen plasma bag 9 between the upper hot plate 6 and the lower hot plate 7, the flexibility is increased. The positioning effect of the member 35 prevents the frozen plasma bag 9 from slipping. As a result, displacement of the frozen plasma bag 9 set on the upper hot plate 7 can be suppressed, and the device 1 can be operated safely.
On the other hand, if the position indicator shown in the figure or a hard metal is used for positioning instead of the flexible member 35, the frozen plasma bag 9 is slippery when the frozen plasma bag 9 is set and held down by the upper lid 5. , no positioning effect can be expected.

Furthermore, in this embodiment, when the upper lid 5 is displaced from the first state S1 to the second state S2 by swinging the swing arm 3, the upper heat is applied to the frozen plasma bag 9 set on the lower hot plate 7. A damper mechanism 41 is provided to dampen the impact of the plate 6 . As a result, when the frozen plasma bag 9 is set on the lower hot plate 7 and then the swing arm 3 is lowered to sandwich the frozen plasma bag 9 between the upper hot plate 6 and the lower hot plate 7, the damper mechanism 41 dampens the collision of the upper hot plate 6 against the frozen plasma bag 9 . As a result, displacement of the frozen plasma bag 9 and damage to the frozen plasma are suppressed, and danger to the operator can be eliminated.

Next, the optimum rocking condition (number of rocking times) of the upper lid 5 of the frozen plasma thawing apparatus 1 having the above configuration will be described. This frozen plasma thawing apparatus 1 is operated for 20 minutes by changing only the number of rocking motions of the top lid 5 around the support shaft 4 (specifically, after heating the heater 27 for 5 minutes without rocking the top lid 5, the top lid 5 is The heater 27 was heated for 15 minutes with a rocking motion), and the 480 cc frozen plasma bag 9 was thawed and the plasma temperature was measured. Table 1 shows the experimental results.

As shown in Table 1, when the upper lid 5 was rocked 0 times/minute, 5 times/minute, and 70 times/minute, the plasma could not be thawed to the optimum temperature (30 to 37°C). In particular, it was found that the temperature in the frozen plasma bag 9 was uneven when the top lid 5 was rocked 0 times/minute (that is, when the top lid 5 was not rocked). Furthermore, it was found that when the upper lid 5 was rocked 70 times/min, the plasma inside could not keep up with the rocking operation, resulting in uneven temperature.
On the other hand, when the upper lid 5 is rocked 10 to 60 times/min, the plasma in the frozen plasma bag 9 can be uniformly thawed at the optimal plasma temperature (30 to 37°C). rice field. From the viewpoint of reducing the number of swings of the top cover 5, it is preferable that the number of swings of the top cover 5 is 10 to 50 times/minute.
If the plasma temperature is thawed to 30 to 37° C., it satisfies the required temperature of the Japanese Red Cross Society, so this is regarded as the optimum plasma temperature.

Next, the optimum rocking condition (the position of the support shaft 4) of the upper lid 5 of the frozen plasma thawing apparatus 1 having the above configuration will be described. In this apparatus for thawing frozen plasma 1, the upper lid 5 is swung in order to thaw the frozen plasma uniformly and quickly to the target temperature. It is desirable to optimize the position of

As shown in FIG. 9A, the ratio of the distance L1 between the support shaft 4 and the other longitudinal end 5b of the upper lid 5 to the distance L2 between the support shaft 4 and the one longitudinal end 5a of the upper lid 5 (L1: When L2) is 25:75, when the kneading rollers 16 are at the top, the pressure applied to the frozen plasma is partial. Since the own weight of the food is large, the food is evenly kneaded, resulting in uniform thawing. However, if the position of the support shaft 4 is moved further toward the other end 5b in the longitudinal direction of the upper lid 5, the pressure applied to the frozen plasma becomes extremely partial due to poor rocking balance, resulting in uneven kneading. put away. In this case, the kneading rollers 16 must be moved up and down by more than 10 cm, and it is not realistic to move the rollers 16 beyond 10 cm due to design limitations.

As shown in FIG. 9B, the ratio of the distance L1 between the support shaft 4 and the other longitudinal end 5b of the upper lid 5 to the distance L2 between the support shaft 4 and the one longitudinal end 5a of the upper lid 5 (L1: When L2) is 45:55, the weight of the upper lid 5 applied to the frozen plasma is small when the kneading rollers 16 are at the bottom, but conversely, when the kneading rollers 16 are at the top, the pressure is applied to the frozen plasma. has a good balance of rocking motion and is almost uniformly kneaded, resulting in uniform defrosting. When the support shaft 4 is positioned at the center of the upper lid 5 in the longitudinal direction, the rocking motion is most uniform, but the weight of the upper lid 5 is not applied and only one side is kneaded.

Therefore, when the ratio (L1:L2) is from 45:55 to 25:75 (preferably from 40:60 to 30:70), the support shaft 4 of the swing arm 3 uniformly and rapidly dispenses the frozen plasma to the target. It will be the optimum position that can be thawed to the temperature. In other words, the support shaft 4 of the swing arm 3 has a distance L2 of 0.55·L between the support shaft 4 and one end 5a of the top cover 5 in the longitudinal direction when the length of the top cover 5 in the longitudinal direction is L mm. ˜0.75·L mm (preferably 0.6·L to 0.7·L) is the optimum position.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention according to the purpose and application. That is, in the above-described embodiment, the upper lid 5 is oscillated by driving the motor 19, but the upper lid 5 may be oscillated by driving a fluid cylinder or the like.

In the above-described embodiment, the top lid 5 is pushed up and rocked by the kneading rollers 16. However, the present invention is not limited to this. It is good also as a form made to move.

Further, in the above embodiment, a plurality of hot plates 6 and 7 are provided so as to thaw a plurality of frozen plasma bags 9, but the present invention is not limited to this. It is good also as a form provided with each hot plate 6 and 7 one each so that it may carry out.

Furthermore, in the above-described embodiment, the motor 19 is driven to swing the upper lid 5 when the predetermined time T1 (5 minutes) has passed since the heater 27 starts heating. In the above-described embodiment, the positioning effect of the flexible member 35 suppresses the slipping of the frozen plasma bag 9. Therefore, the predetermined time T1 is set to zero and the upper lid 5 is swung at the same time as the heater 27 starts heating. After a predetermined time T1 (for example, less than 5 minutes (preferably 1 to 4 minutes, further 1 to 3 minutes)) that is smaller than the conventional set value (5 minutes) from the start of heating, the upper lid 5 is rocked. may

INDUSTRIAL APPLICABILITY The present invention is widely used as a technique for thawing frozen plasma stored in a frozen plasma bag.

1; frozen plasma thawing device, 2; main body, 3; swing arm, 4; support shaft, 5; upper lid, 6; upper hot plate, 7; lower hot plate, 9; elevating member), 35; flexible member, 41; damper mechanism, S1; first state, S2; second state.

Claims (4)

a body, a rocking arm rockably supported by the body, an upper lid rockably supported by the rocking arm about a horizontal support shaft, and an upper heating plate provided on the underside of the top lid. and a lower hot plate provided on the upper surface side of the main body, wherein the upper lid covers the upper surface side of the main body in a first state in which the upper surface side of the main body is opened by swinging of the swing arm. and a second state, displacing the upper lid from the first state to the second state to sandwich the frozen plasma bag between the upper hot plate and the lower hot plate; A frozen plasma thawing device for thawing frozen plasma stored in the frozen plasma bag between the heated upper and lower hot plates by rocking around a support shaft,
A device for thawing frozen plasma, wherein the upper cover is oscillated 10 to 60 times/min. The upper lid is swung around the support shaft by pushing up a lower surface on one end side in a longitudinal direction perpendicular to the support shaft with an elevating member,
A ratio (L1:L2) between the distance (L1) between the support shaft and the other end of the upper cover in the longitudinal direction and the distance (L2) between the support shaft and the one end of the upper cover in the longitudinal direction is 45:55. ∼25:75. A damper mechanism is provided for damping collision of said upper hot plate against said frozen plasma bag set on said lower hot plate when said upper cover is displaced from said first state to said second state. 3. The apparatus for thawing frozen plasma according to 1 or 2. 4. The apparatus for thawing frozen plasma according to any one of claims 1 to 3, wherein the surface of the lower hot plate is provided with a flexible member that matches the size of the frozen plasma bag.

Images