CN116140081A - Centrifugal machine with refrigerating function - Google Patents
Centrifugal machine with refrigerating function Download PDFInfo
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- CN116140081A CN116140081A CN202310417000.0A CN202310417000A CN116140081A CN 116140081 A CN116140081 A CN 116140081A CN 202310417000 A CN202310417000 A CN 202310417000A CN 116140081 A CN116140081 A CN 116140081A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/02—Other accessories for centrifuges for cooling, heating, or heat insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/08—Other accessories for centrifuges for ventilating or producing a vacuum in the centrifuge
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Abstract
The invention relates to the technical field of centrifuges, in particular to a centrifuge with a refrigerating function. According to the invention, the refrigerating layer is arranged in the centrifugal box, so that the centrifugal machine can realize centrifugal operation in a refrigerating environment, the exhaust mechanism is arranged in the box cover, air with higher temperature between the centrifugal bin and the centrifugal liner is exhausted, so that heat generated by friction of the centrifugal machine to ambient air is exhausted due to high-speed rotation of the centrifugal machine, the refrigerating liquid chamber and the refrigerating air chamber are arranged in the refrigerating box, the refrigerating layer is refrigerated through the refrigerating liquid, the temperature stability can be maintained, the long-time centrifugal refrigeration is realized, the precooling air in the refrigerating air chamber is used for ventilating the centrifugal liner, the air with higher temperature is quickly replaced with precooling air, the quick cooling of the surface of the centrifugal bin is realized, meanwhile, the temperature fine adjustment in the centrifugal liner can be realized, the fluctuation of temperature generated in regulation is reduced, and the stability of the temperature in the centrifugal machine is improved.
Description
Technical Field
The invention relates to the technical field of centrifuges, in particular to a centrifuge with a refrigerating function.
Background
The centrifugal machine is a machine for separating each component in liquid and solid particles or a mixture of liquid and liquid by utilizing centrifugal force, and is mainly used for separating solid particles from liquid in suspension or separating two liquids which are different in density and are mutually insoluble in emulsion; the difference between centrifuge hosts is that in terms of performance, a centrifuge with refrigeration is much more expensive than normal, some centrifuges have a heating function, and the more control programs, the higher the centrifuge price.
Chinese patent publication No.: CN112354691a discloses a refrigeration centrifuge, which keeps the inner container in a low-temperature state through a refrigerating system, improves the effect of separating mixture of the whole machine through the arrangement of an automatic locking elastic upper cover and the upgrade of each module, and prolongs the service life of the centrifuge; therefore, the existing refrigeration centrifugal machine is lack of matching control on refrigeration and centrifugal rotation speed, so that the temperature control inside the centrifugal machine is unstable, a large amount of energy for refrigeration is consumed, and the problem of poor separation effect caused by unstable temperature also occurs.
Disclosure of Invention
Therefore, the invention provides a centrifugal machine with a refrigerating function, which is used for solving the problem that the temperature is unstable due to large temperature fluctuation in the internal temperature control of the refrigerating centrifugal machine in the prior art.
In order to achieve the above object, the present invention provides a centrifuge having a refrigerating function, comprising,
the centrifugal container comprises a refrigerating layer and a heat preservation layer arranged on the outer side of the refrigerating layer, a container cover is arranged on the top of the centrifugal container, an exhaust mechanism is arranged in the container cover and used for exhausting gas in the centrifugal container, and a temperature detection device is arranged in the centrifugal container and used for detecting the temperature of the real-time inner container in the centrifugal container;
the refrigeration box is arranged on one side of the centrifugal box and comprises a refrigeration liquid chamber and a refrigeration air chamber, the refrigeration liquid chamber is used for inputting the internal refrigeration liquid into the refrigeration layer through a refrigeration pipe to complete the circulation of the refrigeration liquid, and the refrigeration air chamber is used for inputting the internal precooling gas into the centrifugal liner through a gas supplementing pipe to carry out compensation refrigeration;
the control box is respectively connected with the centrifugal box and the refrigerating box, an input module is arranged in the control box and used for receiving centrifugal operation parameters input from the outside, and the centrifugal operation parameters comprise an operation centrifugal temperature, an operation centrifugal rotating speed and an operation centrifugal time length; the control box judges the temperature of the real-time liner in the centrifugal liner according to the standard starting temperature difference and the running centrifugal temperature which are set in the control box, determines whether to start the power base, selects the initial refrigerating fluid flow rate of the refrigerating fluid chamber according to the running centrifugal temperature after the power base is started, calculates the real-time running temperature difference according to the real-time liner temperature and the running centrifugal temperature in the centrifugal liner, and determines whether to adjust the selected initial refrigerating fluid flow rate of the refrigerating fluid chamber.
Further, a standard starting temperature difference Tb is arranged in the control box, the control box can acquire an externally input operation centrifugal temperature Ty through the input module when receiving a starting instruction, and calculate a first standard temperature T1 and a second standard temperature T2 according to the operation centrifugal temperature Ty and the standard starting temperature difference Tb, the control box judges the real-time liner temperature Ts inside the centrifugal liner detected by the temperature detection device according to the first standard temperature T1 and the second standard temperature T2,
if the real-time liner temperature Ts in the centrifugal liner is lower than the first standard temperature T1, the control box controls the box cover to be opened, and if the real-time liner temperature Ts is not lower than the first standard temperature T1, the control box controls the box cover to be closed;
if the temperature Ts of the real-time inner liner in the centrifugal liner is between the first standard temperature T1 and the second standard temperature T2, the control box judges that the temperature of the real-time inner liner in the centrifugal liner reaches the standard, and the control box starts the power base to drive the centrifugal bin to rotate at the running centrifugal rotating speed received by the input module;
if the real-time liner temperature Ts in the centrifugal liner is higher than the second standard temperature T2, the control box controls the refrigerating liquid chamber to be opened, and if the real-time liner temperature Ts is not higher than the second standard temperature T2, the control box controls the refrigerating liquid chamber to be closed;
where t1=ty-Tb, t2=ty+tb.
Further, an initial flow velocity matrix V and a centrifugal temperature matrix T of the refrigerating fluid in the refrigerating fluid chamber are arranged in the control box, when the control box controls the power base to start, the control box compares and matches the running centrifugal temperature Ty in the centrifugal temperature matrix T, and the initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber is selected from the initial flow velocity matrix V according to a matching result;
the initial flow velocity matrix V comprises a first initial flow velocity V1, a second initial flow velocity V2 and a third initial flow velocity V3, wherein V1 is smaller than V2 and smaller than V3; the centrifugal temperature matrix T comprises a first centrifugal temperature Tx1 and a second centrifugal temperature Tx2, wherein Tx1 is smaller than Tx2; when the control box performs a match of the operating centrifugation temperature Ty,
if Ty is less than Tx1, the control box selects a first initial flow velocity V1 as an initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber, and controls the opening of the refrigerating fluid chamber;
if Tx1 is less than or equal to Ty and less than Tx2, the control box selects a second initial flow velocity V2 as an initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber, and controls the opening of the refrigerating fluid chamber;
if Tx2 is less than or equal to Ty, the control box selects a third initial flow velocity V3 as the initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber, and controls the opening of the refrigerating fluid chamber.
Further, a standard operation temperature difference Tn is arranged in the control box, when the control box finishes the selection of the initial refrigerating fluid flow rate in the refrigerating fluid chamber and starts the refrigerating fluid chamber, the control box acquires the real-time liner temperature Ts in the centrifugal liner detected by the temperature detection device, calculates the real-time operation temperature difference Tz according to the real-time liner temperature Ts and the operation centrifugal temperature Ty, judges the real-time operation temperature difference Tz according to the standard operation temperature difference Tn,
if Tz is less than or equal to Tn, the control box judges that the real-time operation temperature difference does not exceed the standard operation temperature difference, and the control box determines whether to adjust the initial refrigerating fluid flow rate of the refrigerating fluid chamber according to the operation centrifugal rotation speed input by the input module;
if Tz is more than Tn, the control box judges that the real-time operation temperature difference exceeds the standard operation temperature difference, and judges the real-time liner temperature Ts and the operation centrifugal temperature Ty to determine whether to adjust the operation state of the refrigerating liquid chamber;
wherein the standard operating temperature difference Tn is lower than the standard starting temperature difference Tb; tz= |ts-ty|.
Further, the control box compares the real-time liner temperature Ts with the running centrifugal temperature Ty under a first preset condition,
if the temperature Ts of the real-time liner is lower than the running centrifugal temperature Ty, the control box adjusts the initial refrigerating fluid flow velocity Vc of the refrigerating fluid chamber to Vc';
if the temperature Ts of the real-time liner is higher than the running centrifugal temperature Ty, the control box calculates the real-time temperature change rate in the centrifugal liner and judges the real-time temperature change rate so as to determine the cooling mode of the centrifugal liner;
the control box judges that the real-time operation temperature difference exceeds the standard operation temperature difference; vc '=Vc-Vc× [ (Tz-Tn)/Tz ], wherein Vc' is the flow rate of the refrigerating fluid chamber after adjustment, and Vc is the initial flow rate of the refrigerating fluid chamber selected by the control box, and c=1, 2 and 3.
Further, a unit calculation time length ta is arranged in the control box, the control box takes the current time as a reference under a second preset condition, acquires the real-time liner temperature Ts' of the centrifugal liner in the time length ta before the current time, calculates the real-time temperature change rate HT for judgment,
if the real-time temperature change rate HT is less than zero, the control box does not adjust the running state of the refrigerating liquid chamber;
if the real-time temperature change rate HT is equal to zero, the control box adjusts the initial refrigerating fluid flow rate Vc of the refrigerating fluid chamber to Vc';
if the real-time temperature change rate HT is greater than zero, the control box adjusts the initial refrigerating fluid flow rate Vc of the refrigerating fluid chamber to Vc', controls the exhaust mechanism to exhaust gas in the centrifugal liner, and inputs precooled gas in the refrigerating fluid chamber into the centrifugal liner for compensation refrigeration by opening the refrigerating fluid chamber;
the control box judges that the real-time operation temperature difference exceeds the standard operation temperature difference and that the real-time liner temperature Ts is higher than the operation centrifugal temperature Ty; ht= (Ts-Ts ')/ta, vc ' =vc+vc× [ (Tz-Tn)/Tz ], vc ' is the flow rate of the refrigerating fluid in the adjusted refrigerating fluid chamber, and Vc is the initial flow rate of the refrigerating fluid in the selected refrigerating fluid chamber of the control box, c=1, 2, 3.
Further, a standard centrifugal rotating speed Wb is arranged in the control box, when the control box judges that the real-time operation temperature difference does not exceed the standard operation temperature difference, the control box acquires the operation centrifugal rotating speed Ws input by the input module and compares the operation centrifugal rotating speed Ws with the standard centrifugal rotating speed Wb,
when Ws is less than or equal to Wb, the control box judges that the running centrifugal rotating speed does not exceed the standard centrifugal rotating speed, and the control box does not adjust the initial refrigerating fluid flow rate of the refrigerating fluid chamber;
when Ws is more than Wb, the control box judges that the running centrifugal rotating speed exceeds the standard centrifugal rotating speed, calculates the real-time temperature change rate in the centrifugal liner and judges whether to adjust the initial refrigerating fluid flow rate of the refrigerating fluid chamber or not.
Further, when the running centrifugal rotating speed exceeds the standard centrifugal rotating speed, the control box acquires the real-time liner temperature Ts' of the front ta time length of the centrifugal liner at the current moment, calculates the real-time temperature change rate HT for judgment,
if the real-time temperature change rate HT is smaller than or equal to zero, the control box does not adjust the running state of the refrigerating liquid chamber;
if the real-time temperature change rate HT is greater than zero, the control box adjusts the initial refrigerating fluid flow velocity Vc of the refrigerating fluid chamber to Vc',
wherein ta is the unit calculation time length set in the control box, HT= (Ts-Ts ')/ta, vc' =Vc+Vc× [ (Ws-Wb)/Ws ] × (Tz/Tn).
Further, the centrifugal bin top is provided with annular drive claw, the case lid lower part is provided with the annular mouth, annular drive claw can block extremely in the annular mouth, still be provided with drive assembly in the case lid, drive assembly one end links to each other with annular drive claw, and the other end links to each other with the exhaust mechanism who sets up in the case lid when centrifugal bin rotates, drive assembly can transmit annular drive claw's rotation to exhaust mechanism drives exhaust mechanism operation.
Further, the air compressor is arranged on the upper portion of the refrigerating air chamber and used for compressing external air into the refrigerating air chamber, the refrigerating pipe penetrates through the refrigerating air chamber and is arranged in a serpentine mode in the refrigerating air chamber, and the refrigerating pipe can cool compressed air in the refrigerating air chamber to form precooled air.
Compared with the prior art, the centrifugal machine has the beneficial effects that the centrifugal machine can realize centrifugal operation in a refrigeration environment by arranging the refrigeration layer in the centrifugal box, air with higher temperature between the centrifugal bin and the centrifugal liner is discharged by arranging the exhaust mechanism in the box cover, heat generated by friction of the centrifugal machine to ambient air due to high-speed rotation of the centrifugal machine is reduced, the refrigeration liquid chamber and the refrigeration air chamber are arranged in the refrigeration box, the refrigeration layer is refrigerated by the refrigeration liquid, the temperature stability can be maintained, the long-time centrifugal refrigeration is realized, the air in the centrifugal liner is replaced by the precooled air in the refrigeration air chamber, the quick cooling of the centrifugal bin can be realized, the temperature fine adjustment in the centrifugal liner can be realized, the temperature control of the refrigeration liquid chamber, the refrigeration air chamber and the exhaust mechanism is intelligently controlled in real time by arranging the control box according to the input centrifugal operation parameters and the temperature in the centrifugal liner, the temperature control accuracy in the centrifugal machine is ensured, the larger fluctuation generated in the temperature control and adjustment process is reduced, and the stability of the temperature control in the refrigeration centrifuge is improved.
Further, through setting up standard start-up difference in the control box to the temperature standard when controlling centrifuge start-up, standard start-up difference can be set for according to the centrifugation requirement by centrifugal material, can make centrifuge carry out quick start through setting up great standard start-up difference, also can make centrifuge carry out accurate start-up through setting up less standard start-up difference, improved centrifuge's use flexibility, it judges to the real-time inner bag temperature in the centrifugal courage to according to standard start-up difference and the operation centrifugation temperature of input, and make real-time inner bag temperature reach the start-up requirement according to the corresponding adjustment of decision result and start, ensured refrigerating centrifuge's normal operating.
In particular, by setting an initial flow velocity matrix and a centrifugal temperature matrix in the control box in advance, the initial refrigerating fluid flow velocity of the refrigerating fluid chamber is accurately selected according to the input operation centrifugal temperature, the temperature in the centrifugal liner is quickly matched, larger fluctuation generated in the temperature regulation process is further reduced, the stability of temperature control and adjustment in the refrigerating centrifuge is improved, and meanwhile, the matching precision of the refrigerating fluid chamber during initial starting can be increased or reduced according to the number of sections which can be selected in the initial flow velocity matrix and the centrifugal temperature matrix.
Further, when the control box judges that the real-time operation temperature difference does not exceed the standard operation temperature difference, the tendency of heat generated by rotation of the centrifugal bin can be determined according to the input operation centrifugal rotation speed, so that whether the initial refrigerating fluid flow rate of the refrigerating fluid chamber is adjusted in a small range is determined according to the input operation centrifugal rotation speed, the temperature in the centrifugal container is controlled in advance when the temperature in the centrifugal container is not shown, and the temperature fluctuation in the centrifugal container is further reduced.
Further, when the control box judges that the real-time operation temperature difference exceeds the standard operation temperature difference, whether the initial refrigerating fluid flow rate of the refrigerating fluid chamber is regulated is determined according to the actual condition of the temperature of the real-time liner, whether the exhaust mechanism is started is determined according to the real-time temperature change rate under a second preset condition, precooling gas in the refrigerating fluid chamber is input into the centrifugal liner through the refrigerating air chamber for compensation refrigeration, rapid cooling in the centrifugal liner is realized, and the temperature control accuracy of the refrigerating centrifuge is realized.
Drawings
Fig. 1 is a schematic structural diagram of a centrifuge with refrigeration function according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a schematic structural diagram of a centrifuge with a refrigeration function according to an embodiment of the present invention, the embodiment discloses a centrifuge with a refrigeration function, which includes a centrifuge box 1, a power base 101, a centrifuge liner 102, a centrifuge bin 103, a refrigeration layer 104, a heat insulation layer 105, a box cover 106, an exhaust mechanism 107, a temperature detection device 108, an annular driving claw 109, an annular opening 110, a driving component 111, a refrigeration box 2, a refrigeration liquid chamber 201, a refrigeration air chamber 202, a refrigeration pipe 203, an air supplementing pipe 204, an air compressor 205, a control box 3, and an input module 301, wherein,
the centrifugal box 1 is provided with a power base 101 at the bottom thereof for driving a centrifugal bin 103 in the centrifugal liner 102 to rotate, the centrifugal liner 102 comprises a refrigerating layer 104 and a heat preservation layer 105 arranged outside the refrigerating layer 104, a box cover 106 is arranged at the top of the centrifugal box 1, an exhaust mechanism 107 is arranged in the box cover 106 for exhausting gas in the centrifugal liner 102, and a temperature detection device 108 is arranged in the centrifugal liner 102 for detecting the temperature of the liner in real time in the centrifugal liner 102;
the refrigeration box 2 is arranged at one side of the centrifugal box 1, the refrigeration box 2 comprises a refrigeration liquid chamber 201 and a refrigeration air chamber 202, the refrigeration liquid chamber 201 is used for inputting the internal refrigeration liquid into the refrigeration layer 104 through a refrigeration pipe 203 to complete the circulation of the refrigeration liquid, and the refrigeration air chamber 202 is used for inputting the internal precooling gas into the centrifugal liner 102 through a gas supplementing pipe 204 to carry out compensation refrigeration;
the control box 3 is respectively connected with the centrifugal box 1 and the refrigeration box 2, and an input module 301 is arranged in the control box 3 and is used for receiving centrifugal operation parameters input from the outside, wherein the centrifugal operation parameters comprise an operation centrifugal temperature, an operation centrifugal rotating speed and an operation centrifugal time length; the control box 3 judges the real-time liner temperature inside the centrifugal liner 102 according to the standard starting temperature difference and the running centrifugal temperature which are set inside, determines whether to start the power base 101, and can select the initial refrigerating fluid flow rate of the refrigerating fluid chamber 201 according to the running centrifugal temperature after the power base 101 is started, and calculates the real-time running temperature difference according to the real-time liner temperature inside the centrifugal liner 102 and the running centrifugal temperature to judge, and determines whether to adjust the selected initial refrigerating fluid flow rate of the refrigerating fluid chamber 201.
Through set up refrigeration layer 104 in centrifugal case 1, can realize the centrifugal operation under the refrigeration environment to the centrifuge, through set up the higher air of temperature between the outside and the centrifugal courage 102 of exhaust mechanism 107 discharge centrifugal chamber 103 in case lid 106, reduce the heat because the centrifuge high-speed rotates the friction of surrounding air and produce, simultaneously through set up refrigeration liquid room 201 and refrigeration air chamber 202 in refrigeration case 2, refrigerate refrigeration layer 104 through the refrigeration liquid, can maintain the temperature stable, realize long-time centrifugal refrigeration, through the precooling air in the refrigeration air chamber 202 to the inside of centrifugal courage 102 take a breath, can change the higher air of temperature in the centrifugal courage 102 into precooling air fast, realize the quick cooling in centrifugal chamber 103, can realize the temperature fine setting in centrifugal courage 102 simultaneously, rethread set up the real-time inner bag temperature of control box 3 according to the centrifugal operation parameter of input and centrifugal courage 102 inside to refrigeration liquid room 201, refrigeration air chamber 202 and exhaust mechanism 107, the great fluctuation that produces in the temperature regulation process has been reduced when guaranteeing that temperature control is accurate, the stability of the inside temperature control of the centrifuge is improved.
Specifically, a standard starting temperature difference Tb is provided in the control box 3, the control box 3 can obtain an operation centrifugal temperature Ty input from the outside through the input module 301 when receiving a starting command, and calculate a first standard temperature T1 and a second standard temperature T2 according to the operation centrifugal temperature Ty and the standard starting temperature difference Tb, the control box 3 determines a real-time liner temperature Ts inside the centrifugal liner 102 detected by the temperature detecting device 108 according to the first standard temperature T1 and the second standard temperature T2,
if the real-time liner temperature Ts inside the centrifugal liner 102 is lower than the first standard temperature T1, the control box 3 will control the box cover 106 to be opened, until the real-time liner temperature Ts is not lower than the first standard temperature T1, the control box 3 will control the box cover 106 to be closed;
if the real-time liner temperature Ts inside the centrifugal liner 102 is between the first standard temperature T1 and the second standard temperature T2, the control box 3 determines that the real-time liner temperature inside the centrifugal liner 102 meets the standard, and the control box 3 starts the power base 101 to drive the centrifugal bin 103 to rotate at the running centrifugal rotation speed received by the input module 301;
if the real-time liner temperature Ts inside the centrifugal liner 102 is higher than the second standard temperature T2, the control box 3 will control the opening of the refrigerating fluid chamber 201 until the real-time liner temperature Ts is not higher than the second standard temperature T2, and the control box 3 will control the closing of the refrigerating fluid chamber 201;
where t1=ty-Tb, t2=ty+tb.
Through setting up standard start-up difference in control box 3 to the temperature standard when controlling centrifuge starts, standard start-up difference can be set for according to the centrifugation requirement by centrifugal material, can make centrifuge start fast through setting up great standard start-up difference, also can make centrifuge carry out accurate start-up through setting up less standard start-up difference, improved centrifuge's flexibility of use, it judges to the real-time inner bag temperature in the centrifugal bag 102 to according to standard start-up difference and the operation centrifugation temperature of input, and make real-time inner bag temperature reach the start-up requirement according to the corresponding adjustment of decision result and start, ensured refrigerating centrifuge's normal operating.
Specifically, an initial flow velocity matrix V and a centrifugal temperature matrix T of the refrigerant liquid in the refrigerant liquid chamber 201 are disposed in the control box 3, when the control box 3 controls the power base 101 to start, the control box 3 performs contrast matching on the running centrifugal temperature Ty in the centrifugal temperature matrix T, and selects an initial flow velocity of the refrigerant liquid in the refrigerant liquid chamber 201 in the initial flow velocity matrix V according to a matching result;
the initial flow velocity matrix V comprises a first initial flow velocity V1, a second initial flow velocity V2 and a third initial flow velocity V3, wherein V1 is smaller than V2 and smaller than V3; the centrifugal temperature matrix T comprises a first centrifugal temperature Tx1 and a second centrifugal temperature Tx2, wherein Tx1 is smaller than Tx2; when the control box 3 performs a match of the operating centrifugation temperature Ty,
if Ty is less than Tx1, the control box 3 will select the first initial flow velocity V1 as the initial flow velocity of the refrigerant liquid in the refrigerant liquid chamber 201, and control the opening of the refrigerant liquid chamber 201;
if Tx1 is less than or equal to Ty and less than Tx2, the control box 3 will select the second initial flow velocity V2 as the initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber 201, and control the opening of the refrigerating fluid chamber 201;
if Tx2 is less than or equal to Ty, the control box 3 will select the third initial flow velocity V3 as the initial flow velocity of the cooling liquid in the cooling liquid chamber 201, and control the opening of the cooling liquid chamber 201.
Through setting up initial velocity of flow matrix and centrifugal temperature matrix in advance in control box 3, the initial refrigerating fluid velocity of flow of refrigerating fluid room 201 is accurately selected according to the operation centrifugal temperature of input, matches the temperature in the centrifugal liner 102 fast, further reduces the great fluctuation that produces in the temperature regulation and control process, has improved the stability of the inside temperature control regulation of refrigerating centrifuge, can also set for the quantity of selectable interval according to initial velocity of flow matrix and centrifugal temperature matrix simultaneously, increases or reduces the matching accuracy of refrigerating fluid room 201 when initial start-up.
Specifically, a standard operation temperature difference Tn is provided in the control box 3, when the control box 3 completes the selection of the initial flow rate of the cooling liquid in the cooling liquid chamber 201 and starts the cooling liquid chamber 201, the control box 3 obtains the real-time liner temperature Ts inside the centrifugal liner 102 detected by the temperature detecting device 108, calculates the real-time operation temperature difference Tz according to the real-time liner temperature Ts and the operation centrifugal temperature Ty, determines the real-time operation temperature difference Tz according to the standard operation temperature difference Tn,
if Tz is less than or equal to Tn, the control box 3 will determine that the real-time operation temperature difference does not exceed the standard operation temperature difference, and the control box 3 will determine whether to adjust the initial refrigerant flow rate of the refrigerant liquid chamber 201 according to the operation centrifugal rotation speed input by the input module 301;
if Tz is greater than Tn, the control box 3 will determine that the real-time operation temperature difference exceeds the standard operation temperature difference, and will determine the real-time liner temperature Ts and the operation centrifugal temperature Ty to determine whether to adjust the operation state of the refrigerating fluid chamber 201;
wherein the standard operating temperature difference Tn is lower than the standard starting temperature difference Tb; tz= |ts-ty|.
When the control box 3 determines that the real-time operation temperature difference does not exceed the standard operation temperature difference, the tendency of heat generated by rotation of the centrifugal bin 103 can be determined according to the input operation centrifugal rotation speed, so that whether the initial refrigerating fluid flow rate of the refrigerating fluid chamber 201 is adjusted in a small range is determined according to the input operation centrifugal rotation speed, the temperature inside the centrifugal liner 102 is controlled in advance when the temperature inside the centrifugal liner 102 is not shown, and the temperature fluctuation inside the centrifugal machine is further reduced.
Specifically, the control box 3 compares the real-time liner temperature Ts with the running centrifugal temperature Ty under a first preset condition,
if the real-time liner temperature Ts is lower than the running centrifugal temperature Ty, the control box 3 adjusts the initial refrigerant flow velocity Vc of the refrigerant liquid chamber 201 to Vc';
if the real-time liner temperature Ts is higher than the running centrifugal temperature Ty, the control box 3 calculates the real-time temperature change rate in the centrifugal liner 102 and determines to determine the cooling mode of the centrifugal liner 102;
the first preset condition is that the control box 3 judges that the real-time operation temperature difference exceeds the standard operation temperature difference; vc '=vc-vc× [ (Tz-Tn)/Tz ], where Vc' is the adjusted refrigerant flow rate of the refrigerant liquid chamber 201, and Vc is the initial refrigerant flow rate of the selected refrigerant liquid chamber 201 of the control box 3, and c=1, 2, and 3.
Specifically, a unit calculation time length ta is set in the control box 3, the control box 3 will take the current time as a reference under a second preset condition, obtain the real-time liner temperature Ts' of the centrifugal liner 102 in the time length ta before the current time, calculate the real-time temperature change rate HT to determine,
if the real-time temperature change rate HT is less than zero, the control box 3 does not adjust the operation state of the refrigerating fluid chamber 201;
if the real-time temperature change rate HT is equal to zero, the control box 3 adjusts the initial refrigerant flow rate Vc of the refrigerant liquid chamber 201 to Vc';
if the real-time temperature change rate HT is greater than zero, the control box 3 adjusts the initial refrigerant flow rate Vc of the refrigerant liquid chamber 201 to Vc', controls the exhaust mechanism 107 to exhaust the gas inside the centrifugal liner 102, and opens the refrigerant gas chamber 202 to input the precooled gas inside the centrifugal liner 102 into the centrifugal liner 102 for compensation refrigeration;
the second preset condition is that the control box 3 judges that the real-time operation temperature difference exceeds the standard operation temperature difference and the real-time liner temperature Ts is higher than the operation centrifugal temperature Ty; ht= (Ts-Ts ')/ta, vc ' =vc+vc× [ (Tz-Tn)/Tz ], vc ' is the flow rate of the cooling liquid in the adjusted cooling liquid chamber 201, and Vc is the initial flow rate of the cooling liquid in the selected cooling liquid chamber 201 in the control box 3, c=1, 2, 3.
When the control box 3 determines that the real-time operation temperature difference exceeds the standard operation temperature difference, whether the initial refrigerating fluid flow rate of the refrigerating fluid chamber 201 is adjusted is determined according to the actual condition of the real-time liner temperature, whether the exhaust mechanism 107 is started is determined according to the real-time temperature change rate under a second preset condition, precooling gas in the refrigerating air chamber 202 is input into the centrifugal liner 102 for compensation refrigeration, rapid cooling in the centrifugal liner 102 is realized, and the temperature control accuracy of the refrigeration centrifuge is realized.
Specifically, the control box 3 is provided with a standard centrifugal rotation speed Wb, when the control box 3 determines that the real-time operation temperature difference does not exceed the standard operation temperature difference, the control box 3 obtains the operation centrifugal rotation speed Ws input by the input module 301, compares the operation centrifugal rotation speed Ws with the standard centrifugal rotation speed Wb,
when Ws is less than or equal to Wb, the control box 3 determines that the running centrifugal rotational speed does not exceed the standard centrifugal rotational speed, and the control box 3 does not adjust the initial refrigerant flow rate of the refrigerant liquid chamber 201;
when Ws > Wb, the control box 3 determines that the operating centrifugal rotational speed has exceeded the standard centrifugal rotational speed, and the control box 3 calculates the real-time temperature change rate in the centrifugal bladder 102 and determines whether to adjust the initial refrigerant flow rate of the refrigerant liquid chamber 201.
Specifically, when the running centrifugal rotational speed exceeds the standard centrifugal rotational speed, the control box 3 obtains the real-time liner temperature Ts' of the time length of the centrifugal liner 102 in the front ta of the current time, calculates the real-time temperature change rate HT to determine,
if the real-time temperature change rate HT is less than or equal to zero, the control box 3 does not adjust the operation state of the refrigerating fluid chamber 201;
if the real-time temperature change rate HT is greater than zero, the control box 3 adjusts the initial refrigerant flow rate Vc of the refrigerant liquid chamber 201 to Vc',
where ta is a unit calculation time length set in the control box 3, ht= (Ts-Ts ')/ta, vc' =vc+vc× [ (Ws-Wb)/Ws ] × (Tz/Tn).
Specifically, the top of the centrifugal bin 103 is provided with an annular driving claw 109, the lower part of the box cover 106 is provided with an annular opening 110, the annular driving claw 109 can be clamped into the annular opening 110, a driving assembly 111 is further arranged in the box cover 106, one end of the driving assembly 111 is connected with the annular driving claw 109, the other end of the driving assembly is connected with an exhaust mechanism 107 arranged in the box cover 106, and when the centrifugal bin 103 rotates, the driving assembly 111 can transmit the rotation of the annular driving claw 109 to the exhaust mechanism 107 to drive the exhaust mechanism 107 to operate.
Specifically, an air compressor 205 is disposed on the upper portion of the refrigeration chamber 202, the air compressor 205 is configured to compress external air into the refrigeration chamber 202, the refrigeration pipe 203 passes through the refrigeration chamber 202 and is arranged in a serpentine shape inside the refrigeration chamber 202, and the refrigeration pipe 203 can cool the compressed gas in the refrigeration chamber 202 to form precooled gas.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A centrifugal machine with refrigeration function is characterized by comprising,
the centrifugal container comprises a refrigerating layer and a heat preservation layer arranged on the outer side of the refrigerating layer, a container cover is arranged on the top of the centrifugal container, an exhaust mechanism is arranged in the container cover and used for exhausting gas in the centrifugal container, and a temperature detection device is arranged in the centrifugal container and used for detecting the temperature of the real-time inner container in the centrifugal container;
the refrigeration box is arranged on one side of the centrifugal box and comprises a refrigeration liquid chamber and a refrigeration air chamber, the refrigeration liquid chamber is used for inputting the internal refrigeration liquid into the refrigeration layer through a refrigeration pipe to complete the circulation of the refrigeration liquid, and the refrigeration air chamber is used for inputting the internal precooling gas into the centrifugal liner through a gas supplementing pipe to carry out compensation refrigeration;
the control box is respectively connected with the centrifugal box and the refrigerating box, an input module is arranged in the control box and used for receiving centrifugal operation parameters input from the outside, and the centrifugal operation parameters comprise an operation centrifugal temperature, an operation centrifugal rotating speed and an operation centrifugal time length; the control box judges the temperature of the real-time liner in the centrifugal liner according to the standard starting temperature difference and the running centrifugal temperature which are set in the control box, determines whether to start the power base, selects the initial refrigerating fluid flow rate of the refrigerating fluid chamber according to the running centrifugal temperature after the power base is started, calculates the real-time running temperature difference according to the real-time liner temperature and the running centrifugal temperature in the centrifugal liner, and determines whether to adjust the selected initial refrigerating fluid flow rate of the refrigerating fluid chamber.
2. The centrifuge with refrigeration function according to claim 1, wherein a standard starting temperature difference Tb is provided in the control box, the control box can obtain an operation centrifugal temperature Ty inputted from the outside through the input module when receiving a starting instruction, and calculate a first standard temperature T1 and a second standard temperature T2 according to the operation centrifugal temperature Ty and the standard starting temperature difference Tb, the control box judges a real-time liner temperature Ts inside the centrifugal liner detected by the temperature detecting device according to the first standard temperature T1 and the second standard temperature T2,
if the real-time liner temperature Ts in the centrifugal liner is lower than the first standard temperature T1, the control box controls the box cover to be opened, and if the real-time liner temperature Ts is not lower than the first standard temperature T1, the control box controls the box cover to be closed;
if the temperature Ts of the real-time inner liner in the centrifugal liner is between the first standard temperature T1 and the second standard temperature T2, the control box judges that the temperature of the real-time inner liner in the centrifugal liner reaches the standard, and the control box starts the power base to drive the centrifugal bin to rotate at the running centrifugal rotating speed received by the input module;
if the real-time liner temperature Ts in the centrifugal liner is higher than the second standard temperature T2, the control box controls the refrigerating liquid chamber to be opened, and if the real-time liner temperature Ts is not higher than the second standard temperature T2, the control box controls the refrigerating liquid chamber to be closed;
where t1=ty-Tb, t2=ty+tb.
3. The centrifuge with refrigeration function according to claim 2, wherein an initial flow velocity matrix V and a centrifugal temperature matrix T of the refrigerant liquid in the refrigerant liquid chamber are arranged in the control box, when the control box controls the power base to start, the control box performs contrast matching on the running centrifugal temperature Ty in the centrifugal temperature matrix T, and the initial flow velocity of the refrigerant liquid in the refrigerant liquid chamber is selected from the initial flow velocity matrix V according to a matching result;
the initial flow velocity matrix V comprises a first initial flow velocity V1, a second initial flow velocity V2 and a third initial flow velocity V3, wherein V1 is smaller than V2 and smaller than V3; the centrifugal temperature matrix T comprises a first centrifugal temperature Tx1 and a second centrifugal temperature Tx2, wherein Tx1 is smaller than Tx2; when the control box performs a match of the operating centrifugation temperature Ty,
if Ty is less than Tx1, the control box selects a first initial flow velocity V1 as an initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber, and controls the opening of the refrigerating fluid chamber;
if Tx1 is less than or equal to Ty and less than Tx2, the control box selects a second initial flow velocity V2 as an initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber, and controls the opening of the refrigerating fluid chamber;
if Tx2 is less than or equal to Ty, the control box selects a third initial flow velocity V3 as the initial flow velocity of the refrigerating fluid in the refrigerating fluid chamber, and controls the opening of the refrigerating fluid chamber.
4. The centrifuge with refrigeration function according to claim 3, wherein a standard operation temperature difference Tn is provided in the control box, the control box obtains a real-time liner temperature Ts inside the centrifugal liner detected by the temperature detection device when finishing the selection of an initial refrigerant flow rate in the refrigerant liquid chamber and starting the refrigerant liquid chamber, calculates a real-time operation temperature difference Tz according to the real-time liner temperature Ts and the operation centrifugal temperature Ty, determines the real-time operation temperature difference Tz according to the standard operation temperature difference Tn,
if Tz is less than or equal to Tn, the control box judges that the real-time operation temperature difference does not exceed the standard operation temperature difference, and the control box determines whether to adjust the initial refrigerating fluid flow rate of the refrigerating fluid chamber according to the operation centrifugal rotation speed input by the input module;
if Tz is more than Tn, the control box judges that the real-time operation temperature difference exceeds the standard operation temperature difference, and judges the real-time liner temperature Ts and the operation centrifugal temperature Ty to determine whether to adjust the operation state of the refrigerating liquid chamber;
wherein the standard operating temperature difference Tn is lower than the standard starting temperature difference Tb; tz= |ts-ty|.
5. The centrifuge with a refrigeration function according to claim 4, wherein the control box compares the real-time liner temperature Ts with the operating centrifugation temperature Ty under a first preset condition,
if the temperature Ts of the real-time liner is lower than the running centrifugal temperature Ty, the control box adjusts the initial refrigerating fluid flow velocity Vc of the refrigerating fluid chamber to Vc';
if the temperature Ts of the real-time liner is higher than the running centrifugal temperature Ty, the control box calculates the real-time temperature change rate in the centrifugal liner and judges the real-time temperature change rate so as to determine the cooling mode of the centrifugal liner;
the control box judges that the real-time operation temperature difference exceeds the standard operation temperature difference; vc '=Vc-Vc× [ (Tz-Tn)/Tz ], wherein Vc' is the flow rate of the refrigerating fluid chamber after adjustment, and Vc is the initial flow rate of the refrigerating fluid chamber selected by the control box, and c=1, 2 and 3.
6. The centrifuge with refrigeration function according to claim 5, wherein a unit calculation time length ta is set in the control box, the control box will take the current time as a reference under a second preset condition, obtain a real-time liner temperature Ts' of the centrifuge liner in the time length ta before the current time, calculate a real-time temperature change rate HT to determine,
if the real-time temperature change rate HT is less than zero, the control box does not adjust the running state of the refrigerating liquid chamber;
if the real-time temperature change rate HT is equal to zero, the control box adjusts the initial refrigerating fluid flow rate Vc of the refrigerating fluid chamber to Vc';
if the real-time temperature change rate HT is greater than zero, the control box adjusts the initial refrigerating fluid flow rate Vc of the refrigerating fluid chamber to Vc', controls the exhaust mechanism to exhaust gas in the centrifugal liner, and inputs precooled gas in the refrigerating fluid chamber into the centrifugal liner for compensation refrigeration by opening the refrigerating fluid chamber;
the control box judges that the real-time operation temperature difference exceeds the standard operation temperature difference and that the real-time liner temperature Ts is higher than the operation centrifugal temperature Ty; ht= (Ts-Ts ')/ta, vc ' =vc+vc× [ (Tz-Tn)/Tz ], vc ' is the flow rate of the refrigerating fluid in the adjusted refrigerating fluid chamber, and Vc is the initial flow rate of the refrigerating fluid in the selected refrigerating fluid chamber of the control box, c=1, 2, 3.
7. The centrifuge with refrigeration function according to claim 4, wherein a standard centrifugal rotational speed Wb is provided in the control box, and when the control box determines that the real-time operation temperature difference does not exceed the standard operation temperature difference, the control box obtains the operation centrifugal rotational speed Ws input by the input module and compares the operation centrifugal rotational speed Ws with the standard centrifugal rotational speed Wb,
when Ws is less than or equal to Wb, the control box judges that the running centrifugal rotating speed does not exceed the standard centrifugal rotating speed, and the control box does not adjust the initial refrigerating fluid flow rate of the refrigerating fluid chamber;
when Ws is more than Wb, the control box judges that the running centrifugal rotating speed exceeds the standard centrifugal rotating speed, calculates the real-time temperature change rate in the centrifugal liner and judges whether to adjust the initial refrigerating fluid flow rate of the refrigerating fluid chamber or not.
8. The centrifuge with a refrigerating function according to claim 7, wherein the control box acquires a real-time liner temperature Ts' of a preceding ta period of the centrifuge liner at a current time and calculates a real-time temperature change rate HT for determination when an operation centrifuge rotational speed has exceeded a standard centrifuge rotational speed,
if the real-time temperature change rate HT is smaller than or equal to zero, the control box does not adjust the running state of the refrigerating liquid chamber;
if the real-time temperature change rate HT is greater than zero, the control box adjusts the initial refrigerating fluid flow velocity Vc of the refrigerating fluid chamber to Vc',
wherein ta is the unit calculation time length set in the control box, HT= (Ts-Ts ')/ta, vc' =Vc+Vc× [ (Ws-Wb)/Ws ] × (Tz/Tn).
9. The centrifuge with refrigeration function according to claim 1, wherein an annular transmission claw is arranged at the top of the centrifugal bin, an annular opening is arranged at the lower part of the box cover, the annular transmission claw can be clamped into the annular opening, a transmission assembly is further arranged in the box cover, one end of the transmission assembly is connected with the annular transmission claw, the other end of the transmission assembly is connected with an exhaust mechanism arranged in the box cover, and when the centrifugal bin rotates, the transmission assembly can transmit rotation of the annular transmission claw to the exhaust mechanism to drive the exhaust mechanism to operate.
10. The centrifuge with refrigeration function according to claim 1, wherein an air compressor is arranged on the upper portion of the refrigeration chamber, the air compressor is used for compressing external air into the refrigeration chamber, the refrigeration pipe penetrates through the refrigeration chamber and is arranged in a serpentine shape inside the refrigeration chamber, and the refrigeration pipe can cool the compressed gas in the refrigeration chamber to form precooled gas.
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| CN102728486A (en) * | 2011-04-15 | 2012-10-17 | 日立工机株式会社 | Centrifuge |
| CN103212491A (en) * | 2012-01-24 | 2013-07-24 | 日立工机株式会社 | Centrifuge |
| CN103785547A (en) * | 2012-10-31 | 2014-05-14 | 日立工机株式会社 | Centrifuge |
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