CN114367175A - Freezing type drying machine and control device thereof - Google Patents
Freezing type drying machine and control device thereof Download PDFInfo
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- CN114367175A CN114367175A CN202111566602.XA CN202111566602A CN114367175A CN 114367175 A CN114367175 A CN 114367175A CN 202111566602 A CN202111566602 A CN 202111566602A CN 114367175 A CN114367175 A CN 114367175A
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- B01D53/265—Drying gases or vapours by refrigeration (condensation)
Abstract
The invention provides the field of drying equipment, and particularly relates to a dynamic regulation and control method of a freezing type dryer. The dynamic regulation and control method comprises the following steps: presetting a dynamic regulation and control model; acquiring induction information of each functional module of the freezing type dryer; the automatic operation of the freezing type dryer is realized by sensing information and adopting a dynamic regulation and control model to dynamically regulate and control the working parameters of the compressor, the condenser, the pre-cooler and the drain valve. Compared with the prior art, the method has the advantages that relevant setting is firstly carried out in the dynamic regulation and control model in order to maintain a normal and stable working state, prevent abnormal occurrence and comprehensively control the whole freezing type dryer, and on one hand, the value range of the induction information of each corresponding functional module is maintained when the freezing type dryer normally and stably operates.
Description
Technical Field
The invention provides the field of drying equipment, and particularly relates to a dynamic regulation and control method of a freezing type dryer.
Background
The freezing dryer utilizes the heat exchange between the refrigerant and the compressed air to reduce the temperature of the compressed air to the dew point temperature within the range of 2-10 ℃. With the continuous development of the industry of the freezing type drying machine, more and more enterprises enter the industry of the air compressor, more and more people favor the industry of the freezing type drying machine, and meanwhile, a plurality of enterprises stand out.
The intelligent degree of current freeze dryer is low, and user experience effect is poor, can not monitor and carry out effective dynamic control to the machine comprehensively.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a dynamic control method for a freezing type drying machine, aiming at the above-mentioned defects in the prior art, and solve the problem of low intelligent degree of the existing freezing type drying machine.
The technical scheme adopted by the invention for solving the technical problems is as follows: the dynamic regulation and control method of the freezing dryer is provided, the freezing dryer comprises a compressor, a condenser and an evaporator which form an evaporation system, and further comprises a front cooler, a heat exchanger, a gas-water separator and a drain valve which form a drying system, the heat exchanger is connected with the evaporator, and the dynamic regulation and control method comprises the following steps:
presetting a dynamic regulation and control model;
acquiring induction information of each functional module of the freezing type dryer;
the automatic operation of the freezing type dryer is realized by sensing information and adopting a dynamic regulation and control model to dynamically regulate and control the working parameters of the compressor, the condenser, the pre-cooler and the drain valve.
Preferably, the dynamic control method further comprises the following steps:
initializing after electrifying, operating a main interface, and automatically operating the freezing type dryer;
starting the compressor in a delayed manner;
acquiring temperature information of a condenser, and starting a fan of the condenser when the temperature information rises to a preset temperature or temperature range;
the drain valve is started according to a first preset time or a trigger event to perform the drainage operation.
Preferably, the step of starting the compressor in a delayed manner includes:
after the power is switched on and initialized, setting a preset delay time according to the current induction information;
the delay time is counted down and the compressor is run again when the count down is zero.
Preferably, the dynamic control method further comprises the following steps:
obtaining the working current during operation, and if the working current exceeds a preset current value, suspending the operation of the freezing dryer;
obtaining the pressure during operation, and if the pressure is lower than a first preset pressure value or higher than a second preset pressure value, suspending the operation of the freeze dryer;
respectively setting first preset temperature values associated with the compressor, the condenser and the pre-cooler, acquiring the temperature of the compressor, the temperature of the condenser and the temperature of the pre-cooler, and suspending the operation of the freeze dryer if one of the temperatures exceeds the corresponding first preset temperature value;
and acquiring the dew point temperature of the evaporator, and if the dew point temperature is continuously higher than a second preset temperature value within a second preset time, suspending the operation of the freeze dryer.
Preferably, the freeze dryer further includes a display screen, and the dynamic control method further includes:
if the working current exceeds a preset current value, displaying overcurrent protection on a display screen;
if the pressure is lower than a first preset pressure value, displaying low-pressure protection on a display screen;
if the pressure is lower than a second preset pressure value, the display screen displays high-pressure protection;
if the temperature exceeds the corresponding first preset temperature value, the display screen displays high-temperature protection;
if the temperature value is continuously higher than the second preset temperature value within the second preset time, the display screen displays refrigeration abnormity.
Preferably, the freeze dryer further includes two control buttons, and the dynamic control method further includes:
manually regulating and controlling the freezing type dryer through the triggering conditions of the two keys;
the triggering condition comprises single click, long press, simultaneous single click and simultaneous long press, wherein the single click is that at least one of the two keys is pressed down and released within a third preset time; the simultaneous clicking is that the two keys are both pressed and released within a third preset time; the long press is that at least one of the two keys is pressed and maintained within a fourth preset time; the simultaneous pressing is that the two keys are both pressed and maintained within the fourth preset time.
Preferably, the two control keys are a first key and a second key respectively, and the step of the dynamic control method further includes:
pressing the second key for a long time and keeping the time above a fifth preset time, and controlling the compressor, the condenser and the drain valve to stop running;
and long pressing the second key again and maintaining the preset time for more than sixth preset time, and controlling the compressor, the condenser and the drain valve to operate according to the dynamic regulation and control model again to enable the interior of the freezing type dryer to be in a stable state.
Preferably, the freeze dryer further includes a display screen and a bypass valve disposed between the evaporator and the condenser, the two control buttons are a first button and a second button, respectively, and the dynamic control method further includes:
pressing the first key for a long time in sequence, and sequentially jumping the display screen to different function interfaces; the functional interface is at least provided with two functional interfaces, and the functional interfaces are continuously displayed in sequence according to the long-time pressing of the first key;
the functional interface comprises at least two of an electrical working condition interface, a temperature working condition interface, a maintenance test interface and a parameter setting interface; wherein the content of the first and second substances,
the electric working condition interface comprises the operation or/and closing working condition information of the compressor, the condenser, the drain valve and the bypass valve; the temperature working condition interface comprises the temperature of the compressor, the temperature of the condenser, the dew point temperature of the evaporator and the temperature of the internal environment of the freeze dryer; the maintenance test interface comprises a main maintenance test interface and a secondary maintenance test interface, the main maintenance test interface comprises maintenance selection information of the compressor, the condenser and the drain valve, and the secondary maintenance test interface comprises operation or/and closing working condition information of the compressor, operation or/and closing working condition information of the condenser or operation or/and closing working condition information of the drain valve.
Preferably, the dynamic control method further comprises the following steps:
simultaneously clicking a first key and a second key in a parameter setting interface, and selecting parameters of a drainage period, drainage actions, on/off of a fan of a condenser and overcurrent protection for setting;
and the corresponding numerical value is increased after the second key is clicked, the corresponding numerical value is decreased after the first key is clicked, the corresponding numerical value is increased after the second key is pressed for a long time, and the corresponding numerical value is decreased after the second key is pressed for a long time.
Preferably, the dynamic control method further comprises the following steps: stopping operating the control key and starting a screen protection after reaching a seventh preset time, and closing the screen backlight; and in addition to the electrical working condition interface and the temperature working condition interface, any interface returns to the main interface after the control key is stopped to operate and the eighth preset time is reached.
Compared with the prior art, the method has the advantages that in order to maintain a normal and stable working state, prevent abnormal occurrence and comprehensively control the whole freezing type dryer, relevant setting is firstly carried out in a dynamic regulation and control model, and on one hand, the value range of the induction information of each corresponding functional module is maintained when the freezing type dryer normally and stably operates; on the other hand, a plurality of sets of control schemes are built in, and because the control of each functional module can bring global operation change, a plurality of control schemes are needed to carry out control in different directions, so that the operation tends to be stable.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of the construction of the inventive freeze dryer;
FIG. 2 is a schematic flow diagram of the dynamic control method of the freeze dryer of the present invention;
FIG. 3 is a schematic flow chart of the dynamic regulation method after initialization after power-on according to the present invention;
FIG. 4 is a schematic flow chart of the dynamic regulation and control method based on various sensing information;
FIG. 5 is a schematic flow chart of the dynamic control method based on the display screen;
FIG. 6 is a flow chart of the dynamic control method based on the control key of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present invention provides a preferred embodiment of a dynamic control method of a freeze dryer.
A dynamic control method of a freezing dryer, the freezing dryer comprises a compressor 110, a condenser 130 and an evaporator 120 which form an evaporation system, and further comprises a pre-cooler 210, a heat exchanger 220, a gas-water separator 230 and a drain valve 240 which form a drying system, the heat exchanger 220 is connected with the evaporator 120, the dynamic control method comprises the following steps:
step S01, presetting a dynamic regulation and control model;
s11, acquiring induction information of each functional module of the freezing type dryer;
and step S12, dynamically adjusting and controlling the working parameters of the compressor 110, the condenser 130, the pre-cooler 210 and the drain valve 240 by sensing information and adopting a dynamic adjusting and controlling model, thereby realizing the automatic operation of the freezing type dryer.
Specifically, the freeze dryer comprises two systems, namely an inner circulation evaporation system and an outer circulation drying system, wherein the outer air is dried after entering the drying system and then is output outwards, the evaporation system provides a cooling process required by air drying in the drying system, the air in the drying system is cooled, and the inside water vapor is condensed into water to dry the air. In the evaporation system, the external compressed air compressed by the compressor 110 flows to the evaporator 120 through the condenser 130 to obtain cold air cooled to zero pressure, and in the drying system, the compressed air cooled by the pre-cooler 210 and the cold air are sequentially subjected to heat exchange in the heat exchanger 220, gas-water separation in the gas-water separator 230, and heat exchange again in the heat exchanger 220 to raise the temperature, and then the dried low-temperature cold air is discharged from the heat exchanger 220, and simultaneously, the liquid after the gas-water separator 230 is discharged to the outside through the drain valve 240.
In order to maintain the normal and stable working state, prevent abnormal occurrence and comprehensively control the whole freezing type dryer, relevant setting is firstly carried out in a dynamic control model, on one hand, the value range of the induction information of each corresponding functional module is maintained when the freezing type dryer normally and stably runs; on the other hand, a plurality of sets of control schemes are built in, and because the control of each functional module can bring global operation change, a plurality of control schemes are needed to carry out control in different directions, so that the operation tends to be stable. Therefore, the sensing information of each functional module of the freeze dryer is obtained through step S11, and whether each sensing information is satisfied between the value ranges is analyzed.
The sensing module comprises at least one of a temperature sensor, a humidity sensor and a pressure sensor. Through multiple types of response module, acquire the data of the different dimensions of freeze dryer, understand freeze dryer more comprehensively, simultaneously, the response module not only can set up in each functional module of freeze dryer, can also set up inside and outside the freeze dryer casing, can set up even on the electric wire, realizes more comprehensive data acquisition, perhaps the response information of self during operation also acquires outside or inside environmental information simultaneously.
In one embodiment, the temperature sensing module includes an ambient temperature sensor, a compressor 110 temperature sensor, an inlet air temperature sensor, an outlet air temperature sensor, a condensing temperature sensor, an evaporating temperature sensor, and a cooling temperature sensor; the environment temperature sensor is disposed inside or outside the freeze dryer, the temperature sensor of the compressor 110 is disposed on the compressor 110, the inlet air temperature sensor and the outlet air temperature sensor are disposed at the air inlet and the air outlet of the drying system, the condensing temperature sensor is disposed on the condenser 130 or/and the pre-cooler 210, and the evaporating temperature sensor is disposed on the evaporator 120. Furthermore, a temperature sensor is required to be arranged in the inner space of the freeze dryer or outside the freeze dryer, the temperature sensor arranged inside ensures the controllability of the inner temperature, and the adjustment of the inner air can be realized through heat dissipation, temperature rise and other modes, so that the inner function module can work at a better working temperature; the outside is provided with temperature sensor and is satisfied that the homoenergetic is high-efficient to be carried out work in the freeze dryer can different environment, does not receive the outside temperature influence, if the temperature is unusual, can suitably adjust the operating parameter of inside function module to satisfy normal work demand, also reduce the influence of external environment to internal environment.
In one embodiment, the pressure sensors include a condensing pressure sensor, an inlet pressure sensor, and an outlet pressure sensor; wherein, the condensation pressure sensor is arranged on the condenser 130, and the air inlet pressure sensor and the air outlet pressure sensor are respectively arranged at the air inlet and the air outlet of the drying system. When the freeze dryer is in operation, each functional module generates different pressures according to its own function, for example, the condenser 130 functions to cool the high-pressure and superheated refrigerant vapor discharged from the refrigerant compressor 110 into a liquid refrigerant, so that a condensing pressure sensor is required to obtain the operating pressure of the condenser 130, that is, the discharged pressure; the phase change in the evaporator 12020 is changed into low-pressure refrigerant vapor, and the ambient heat is absorbed in the phase change process, so that the compressed air is cooled, and the compression condition can be obtained by obtaining the pressure in the evaporator 120; the detection of the air inlet pressure sensor and the air outlet pressure sensor is also very moderate, the general working condition of the interior can be obtained through the pressure detection of two positions, and when the pressure is abnormal, the most possible factors are that the interior is condensed or the temperature is raised, or the drying is not thorough.
As shown in FIG. 3, the present invention provides a preferred embodiment of the dynamic adjustment method after initialization after power-on.
The dynamic regulation method further comprises the following steps:
step S21, initializing after electrifying, operating a main interface, and automatically operating the freezing type dryer;
step S22, the compressor 110 is started in a delayed mode;
step S23, acquiring temperature information of the condenser 130, and starting a fan of the condenser 130 when the temperature information rises to a preset temperature or temperature range;
in step S24, the drain valve 240 is activated according to a first preset time or a trigger event to perform a drain operation.
Specifically, steps S21 to S24 are not sequential steps, and work according to the corresponding situation, for example, steps S21 and S22 may be performed at the moment after power-on, and steps S23 and S24 may be performed at the time of a specific trigger event.
The compressor 110 delay has two important reasons, the first is that the system checks the working state of the machine, and whether the sensed information is in accordance with the demand, so as to reduce the damage of the compressor 110, and on the other hand, the internal pressure of the compressor 110 is still relatively high immediately after the shutdown, if the compressor is started immediately, the motor will be started in a high-pressure state, and the starting may fail because the starting current is too large. The delayed start makes the high and low pressures inside the compressor 110 smooth, and the device can be started normally.
The fan is an important link for regulating and controlling the condenser 130, and the fan accelerates the air flow, thereby improving the heat reduction effect and efficiency, and also being an important regulation mode of the freeze dryer. The drain valve 240 is connected to the gas-water separator 230, periodically obtains the amount of water stored in the gas-water separator 230, and discharges the water through the drain valve 240 when the amount of water is at a high level, so as to maintain the internal balance of the drying system, and meanwhile, the drain valve 240 does not need to be opened for a long time, so that the circulation of air between the inside and the outside is easily caused, the possibility of air leakage is generated, or the pollution of the internal air is caused.
In a preferred embodiment, the step of delaying the start of the compressor 110 comprises: after the power is switched on and initialized, setting a preset delay time according to the current induction information; the delay time is counted down and the compressor 110 is operated again when the count down is zero.
The predetermined delay time is a fixed time, but the acceleration time can be counted down by related aspects, for example, the predetermined delay time is determined according to the longest detection process time of the whole freeze dryer, and if the detection process is accelerated due to various factors, such as working conditions and environmental conditions, the counting down of the predetermined delay time can be accelerated.
As shown in FIG. 4, the present invention provides a preferred embodiment of a dynamic adjustment method based on various sensed information.
The dynamic regulation method further comprises the following steps:
step S31, obtaining the working current when in operation, and if the working current exceeds the preset current value, suspending the operation of the freezing dryer;
step S32, obtaining the pressure during operation, and if the pressure is lower than a first preset pressure value or higher than a second preset pressure value, suspending the operation of the freeze dryer;
step S33, setting first preset temperature values associated with the compressor 110, the condenser 130 and the pre-cooler 210, respectively, obtaining the temperature of the compressor 110, the temperature of the condenser 130 and the temperature of the pre-cooler 210, and suspending the operation of the freeze dryer if one of the temperatures exceeds the corresponding first preset temperature value;
step S34, obtaining the dew point temperature of the evaporator 120, and if the dew point temperature is continuously higher than the second preset temperature value within the second preset time, suspending the operation of the freeze dryer.
Specifically, in the actual regulation process, there are many points to be regulated, and attention is paid to the occurrence of "abnormality", where the abnormality includes overcurrent, abnormal pressure, abnormal temperature, and the like, for example, by obtaining the current state, if the current change is too large, or the current value is too large, that is, the power of a certain functional module is too large, the power may seriously affect the internal stability, and the operation may need to be suspended; similarly, the pressure cannot be too low or too high, so that explosion is easily generated and internal parts are damaged when the pressure is too high, and the operation can not be suspended when the pressure is too low due to the abnormality of the internal functional module; similarly, the compressor 110, the condenser 130 and the pre-cooler 210 are important cores for maintaining the internal temperature, and the interior needs to wander between a high temperature and a low temperature, so that the temperature of the compressor 110, the temperature of the condenser 130 and the temperature of the pre-cooler 210 are suspended if at least one of the temperatures exceeds the corresponding first preset temperature value, and meanwhile, the preset temperature value of the compressor 110, the preset temperature value of the condenser 130 and the preset temperature value of the pre-cooler 210 may be different, and are mainly determined according to the models or internal settings of the compressor 110, the condenser 130 and the pre-cooler 210.
In a preferred embodiment, and referring to fig. 5, the freeze dryer further comprises a display screen, and the step of the dynamic control method further comprises:
step S311, if the working current exceeds a preset current value, displaying overcurrent protection on a display screen;
step S321, if the pressure is lower than a first preset pressure value, displaying low-pressure protection on a display screen;
step S322, if the pressure is lower than a second preset pressure value, displaying high-pressure protection on a display screen;
step S331, if the temperature exceeds a corresponding first preset temperature value, displaying high-temperature protection on a display screen;
step S341, if the temperature value is continuously higher than the second preset temperature value within the second preset time, the display screen displays the refrigeration abnormality.
The current abnormity or state is displayed through the display screen, so that a user can better know the main state of the freeze-dryer under intelligent control, and the subsequent operation of the user, such as maintenance or work pause, is facilitated.
As shown in FIG. 6, the present invention provides a preferred embodiment of a dynamic control method based on control buttons.
The freezing type dryer further comprises two control keys, and the dynamic regulation and control method further comprises the following steps:
step S41, manually regulating and controlling the freezing type dryer through the triggering conditions of the two keys;
the triggering condition comprises single click, long press, simultaneous single click and simultaneous long press, wherein the single click is that at least one of the two keys is pressed down and released within a third preset time; the simultaneous clicking is that the two keys are both pressed and released within a third preset time; the long press is that at least one of the two keys is pressed and maintained within a fourth preset time; the simultaneous pressing is that the two keys are both pressed and maintained within the fourth preset time.
The multi-key triggering condition is realized through the two keys, the false triggering is prevented, the circuit complexity is reduced, and the overall performance is optimized. Especially for some special functions, if only one key is adopted, damage or abnormal processing can be easily caused.
In one embodiment, the two control keys are a first key and a second key, respectively, and the step of the dynamic regulation and control method further includes:
step S421, pressing the second button for a long time and keeping the second button for more than a fifth preset time, and controlling the compressor 110, the condenser 130 and the drain valve 240 to stop running;
step S422, the second button is pressed again for a long time and the operation of the compressor 110, the condenser 130 and the drain valve 240 is controlled again according to the dynamic control model, so that the interior of the freeze dryer is in a stable state.
The scheme is a main mode for realizing direct stopping and restarting of the freeze dryer, the work of each functional module is slowly stopped instead of power failure, but the detection of the sensing module is still work consistently, for example, the abnormal freeze dryer slowly tends to be calm, but the monitoring of the abnormal freeze dryer cannot be lost.
The restart is not a power-off restart, but is performed on the basis of step S421, so that the interior of the freeze dryer is in a stable state, the restart is consistent with the power-on restart, the sensing information of each functional module of the freeze dryer must be acquired, and the working parameters of the compressor 110, the condenser 130, the pre-cooler 210 and the drain valve 240 are dynamically adjusted and controlled by the sensing information and by adopting a dynamic regulation and control model, so as to realize the automatic operation of the freeze dryer.
In one embodiment, the freeze dryer further comprises a display screen and a bypass valve disposed between the evaporator 120 and the condenser 130, the two control buttons are a first button and a second button, respectively, and the step of the dynamic control method further comprises:
s43, pressing the first keys for a long time in sequence, and jumping to different function interfaces in sequence by the display screen; the functional interface is at least provided with two functional interfaces, and the functional interfaces are continuously displayed in sequence according to the long-time pressing of the first key;
the functional interface comprises at least two of an electrical working condition interface, a temperature working condition interface, a maintenance test interface and a parameter setting interface; wherein the content of the first and second substances,
the electrical condition interface includes operating or/and closing condition information of the compressor 110, the condenser 130, the drain valve 240, and the bypass valve; the temperature condition interface includes the temperature of the compressor 110, the temperature of the condenser 130, the dew point temperature of the evaporator 120, and the temperature of the internal environment of the freeze dryer; the maintenance test interface comprises a main maintenance test interface and a secondary maintenance test interface, the main maintenance test interface comprises maintenance selection information of the compressor 110, the condenser 130 and the drain valve 240, and the secondary maintenance test interface comprises operation or/and closing condition information of the compressor 110, operation or/and closing condition information of the condenser 130 or operation or/and closing condition information of the drain valve 240. In the parameter setting interface, simultaneously clicking a first key and a second key, and selecting parameters of a water drainage period, a water drainage action, the opening or closing of a fan of the condenser 130 and overcurrent protection for setting; and the corresponding numerical value is increased after the second key is clicked, the corresponding numerical value is decreased after the first key is clicked, the corresponding numerical value is increased after the second key is pressed for a long time, and the corresponding numerical value is decreased after the second key is pressed for a long time.
The working condition refers to the working state of the equipment under the condition directly related to the action of the equipment. The electrical working condition interface comprises a normal operation state, an abnormal working state or a fault state, and is used for quickly closing the protected equipment to avoid secondary damage when a fault which is enough to damage the equipment or endanger safe operation occurs; and, can send out the alarm signal in time to the abnormal operation and in abnormal state, in order to deal with rapidly, make it recover to normal; and the system automation and telecontrol and the automatic control of industrial production are realized. The temperature of the internal environment of the interface freezing dryer under the temperature working condition can be obtained through the temperature of the shell, and the effective cooling can be realized through the convection of the fan; the temperature of the compressor 110 can be obtained by the shell temperature of the compressor 110, the upper shell of the compressor 110 is influenced by the sucked gas, the temperature is relatively low, the temperature is in a slightly hot or slightly cold range, the temperature is estimated to be about 30 ℃, the possibility of dew condensation on the local shell surface around the suction pipe is provided, and the heat productivity of the motor in the lower shell and the friction heat brought out by the refrigeration oil are mainly brought out of the shell by steam; the temperature of the condenser 130, the temperature condition of the condenser 130 is normal condition, the front half radiating pipe is very hot, and the temperature has slow gradual descending equilibrium, the thermal induction degree of the rear half radiating pipe is greatly reduced compared with the front half, this is because the refrigerant in the rear half pipe has been liquefied gradually, has reached the condensing temperature and the supercooling temperature, when the abnormal condition occurs, the front half is not too hot, the rear half is close to the normal temperature (ambient temperature), the reason is that the compressor 110 sucks the wet steam refrigerant or the refrigerant quantity is insufficient, the other is that the whole condensing pipe is very hot, the reason is that the refrigerant quantity is excessive or the ventilation quantity is small, or the ambient temperature is high; of course, the temperature of the condenser 130 can also be represented by the temperature of the shell of the condenser 130, the shell of the shell-and-tube condenser 130 is normally warm in the upper half compared with the lower half which is warmer than the lower half, and the whole shell is not too hot in abnormal conditions, because the amount of refrigerant is insufficient, or the whole shell is very hot in the other condition because the amount of cooling water is insufficient or the heat dissipation effect is poor (scaling in the water pipe); under the normal condition of the evaporator 120, the outer surface of the evaporator 120 is very cold, condensation water drops of the evaporator 120 continuously drop, the temperature of inlet and outlet air is high, usually delta t can be 12-14 ℃, under the abnormal condition, the surface of the evaporator 120 is not very cold, little condensation water exists, or condensation does not occur, the flowing sound of a refrigerant can be heard, and the temperature difference of the inlet and outlet air is small. The reason for this is that the amount of refrigerant is insufficient, or the opening degree of the expansion valve is small; the main purpose of maintenance tests is to assess the degree of wear of mechanical equipment, determine when maintenance is required, and measure the quality of the completed maintenance, such tests being generally divided into diagnostics and quality assurance; in order to enable a user to quickly realize the function of parameter query data, a special parameter interface is provided for placing a control related to query, and simple attribute setting can be carried out on the parameter interface.
In one embodiment, the step of the dynamic regulation method further comprises:
stopping operating the control key and starting a screen protection after reaching a seventh preset time, and closing the screen backlight; except for the electric working condition interface and the temperature working condition interface, any interface returns to the main interface after the control key is stopped to operate and the eighth preset time is reached.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (10)
1. A dynamic regulation and control method of a freezing dryer comprises a compressor, a condenser and an evaporator which form an evaporation system, and further comprises a front cooler, a heat exchanger, a gas-water separator and a drain valve which form a drying system, wherein the heat exchanger is connected with the evaporator, and is characterized in that the dynamic regulation and control method comprises the following steps:
presetting a dynamic regulation and control model;
acquiring induction information of each functional module of the freezing type dryer;
the automatic operation of the freezing type dryer is realized by sensing information and adopting a dynamic regulation and control model to dynamically regulate and control the working parameters of the compressor, the condenser, the pre-cooler and the drain valve.
2. The dynamic tuning method of claim 1, wherein the step of dynamically tuning further comprises:
initializing after electrifying, operating a main interface, and automatically operating the freezing type dryer;
starting the compressor in a delayed manner;
acquiring temperature information of a condenser, and starting a fan of the condenser when the temperature information rises to a preset temperature or temperature range;
the drain valve is started according to a first preset time or a trigger event to perform the drainage operation.
3. The dynamic regulation method of claim 2, wherein the step of delaying the start of the compressor comprises:
after the power is switched on and initialized, setting a preset delay time according to the current induction information;
the delay time is counted down and the compressor is run again when the count down is zero.
4. The dynamic tuning method of claim 1, wherein the step of dynamically tuning further comprises:
obtaining the working current during operation, and if the working current exceeds a preset current value, suspending the operation of the freezing dryer;
obtaining the pressure during operation, and if the pressure is lower than a first preset pressure value or higher than a second preset pressure value, suspending the operation of the freeze dryer;
respectively setting first preset temperature values associated with the compressor, the condenser and the pre-cooler, acquiring the temperature of the compressor, the temperature of the condenser and the temperature of the pre-cooler, and suspending the operation of the freeze dryer if one of the temperatures exceeds the corresponding first preset temperature value;
and acquiring the dew point temperature of the evaporator, and if the dew point temperature is continuously higher than a second preset temperature value within a second preset time, suspending the operation of the freeze dryer.
5. A dynamic tuning method as claimed in claim 4, wherein the freeze dryer further comprises a display screen, the steps of the dynamic tuning method further comprising:
if the working current exceeds a preset current value, displaying overcurrent protection on a display screen;
if the pressure is lower than a first preset pressure value, displaying low-pressure protection on a display screen;
if the pressure is lower than a second preset pressure value, the display screen displays high-pressure protection;
if the temperature exceeds the corresponding first preset temperature value, the display screen displays high-temperature protection;
if the temperature value is continuously higher than the second preset temperature value within the second preset time, the display screen displays refrigeration abnormity.
6. A dynamic regulation method as defined in claim 1, wherein the freeze dryer further comprises two control buttons, the steps of the dynamic regulation method further comprising:
manually regulating and controlling the freezing type dryer through the triggering conditions of the two keys;
the triggering condition comprises single click, long press, simultaneous single click and simultaneous long press, wherein the single click is that at least one of the two keys is pressed down and released within a third preset time; the simultaneous clicking is that the two keys are both pressed and released within a third preset time; the long press is that at least one of the two keys is pressed and maintained within a fourth preset time; the simultaneous pressing is that the two keys are both pressed and maintained within the fourth preset time.
7. The dynamic adjustment and control method according to claim 6, wherein the two control buttons are a first button and a second button, respectively, and the steps of the dynamic adjustment and control method further comprise:
pressing the second key for a long time and keeping the time above a fifth preset time, and controlling the compressor, the condenser and the drain valve to stop running;
and long pressing the second key again and maintaining the preset time for more than sixth preset time, and controlling the compressor, the condenser and the drain valve to operate according to the dynamic regulation and control model again to enable the interior of the freezing type dryer to be in a stable state.
8. The dynamic conditioning method of claim 6, wherein said freeze dryer further comprises a display screen and a bypass valve disposed between the evaporator and the condenser, the two control buttons being a first button and a second button, respectively, the steps of the dynamic conditioning method further comprising:
pressing the first key for a long time in sequence, and sequentially jumping the display screen to different function interfaces; the functional interface is at least provided with two functional interfaces, and the functional interfaces are continuously displayed in sequence according to the long-time pressing of the first key;
the functional interface comprises at least two of an electrical working condition interface, a temperature working condition interface, a maintenance test interface and a parameter setting interface; wherein the content of the first and second substances,
the electric working condition interface comprises the operation or/and closing working condition information of the compressor, the condenser, the drain valve and the bypass valve; the temperature working condition interface comprises the temperature of the compressor, the temperature of the condenser, the dew point temperature of the evaporator and the temperature of the internal environment of the freeze dryer; the maintenance test interface comprises a main maintenance test interface and a secondary maintenance test interface, the main maintenance test interface comprises maintenance selection information of the compressor, the condenser and the drain valve, and the secondary maintenance test interface comprises operation or/and closing working condition information of the compressor, operation or/and closing working condition information of the condenser or operation or/and closing working condition information of the drain valve.
9. The dynamic tuning method of claim 8, wherein the step of dynamically tuning further comprises:
simultaneously clicking a first key and a second key in a parameter setting interface, and selecting parameters of a drainage period, drainage actions, on/off of a fan of a condenser and overcurrent protection for setting;
and the corresponding numerical value is increased after the second key is clicked, the corresponding numerical value is decreased after the first key is clicked, the corresponding numerical value is increased after the second key is pressed for a long time, and the corresponding numerical value is decreased after the second key is pressed for a long time.
10. The dynamic tuning method of claim 8, wherein the step of dynamically tuning further comprises: stopping operating the control key and starting a screen protection after reaching a seventh preset time, and closing the screen backlight; and in addition to the electrical working condition interface and the temperature working condition interface, any interface returns to the main interface after the control key is stopped to operate and the eighth preset time is reached.
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| CN202111566602.XA CN114367175A (en) | 2021-12-20 | 2021-12-20 | Freezing type drying machine and control device thereof |
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| CN202111566602.XA CN114367175A (en) | 2021-12-20 | 2021-12-20 | Freezing type drying machine and control device thereof |
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