CN216868912U - Frost prevention control system - Google Patents
Frost prevention control system Download PDFInfo
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- CN216868912U CN216868912U CN202122604349.4U CN202122604349U CN216868912U CN 216868912 U CN216868912 U CN 216868912U CN 202122604349 U CN202122604349 U CN 202122604349U CN 216868912 U CN216868912 U CN 216868912U
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Abstract
The utility model discloses a frost prevention control system, which comprises a refrigeration house, a terminal display, a controller, a differential pressure sensor, a pressure sensor group, a control valve group and at least one gas cylinder, wherein the pressure sensor group comprises at least one pressure sensor matched with the number of the gas cylinders, the control valve group comprises at least one control valve matched with the number of the gas cylinders, and the pressure sensor group, the control valve group and the gas cylinders are all arranged in the refrigeration house. The intelligent gas cylinder state detection device greatly improves the intelligence, enables a user to timely distinguish the state of the gas cylinder, and carries out planned gas cylinder replacement or inspection.
Description
Technical Field
The utility model relates to the technical field of refrigeration, in particular to a frost prevention control system.
Background
In the field of medical appliance industry, relevant policy laws require that blood samples be processed as soon as possible after collection and stored at a specified temperature of 2-8 ℃. At present, a common method for blood samples after collection when relevant detection experiments cannot be immediately carried out is that the blood samples are placed in a refrigerator (or freezer) to be stored at the temperature of 2-8 ℃, when the samples need to be detected, the samples are manually taken out from the refrigerator (or freezer) to be tested, and if the blood samples need to be subjected to assembly line operation, automatic access cannot be achieved in the common refrigerator (or freezer), so that the requirements obviously cannot be met.
With the development of science and technology, the automatic freezer is gradually brought to the market, and for the automatic freezer, face two important problems, respectively: firstly, the temperature fluctuation in the refrigeration house causes the solid freezing and melting process of the stored articles, especially the great fluctuation of the temperature in the refrigeration house caused by opening and closing the refrigeration house door in the article storing and taking process, and the quality of the stored articles in the refrigeration house is easy to be obviously influenced; secondly, in the inside low temperature environment of freezer and outside relative high temperature environment combination region, cold and heat exchange easily takes place, arouses frosting or fog agglutination to influence automatic device's continuous effective operation, like the automation equipment of the insulated door department of automation freezer, frosting or fogging take place most easily, make corresponding automation equipment inefficacy. In the prior art, as in patents CN206019134U and CN106152679A, an air curtain is adopted at a door of a refrigerator to prevent outside air from entering the refrigerator, but the design of the air curtain can bring water vapor into the refrigerator when part of the air enters the refrigerator, and the water vapor freezes when the water vapor meets the cold, so that there is still a large improvement space in the intellectualization of the adjustment method, the control method, and the control system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a frost prevention control system for overcoming the defects in the prior art.
The utility model is realized by the following technical scheme:
the utility model provides a frost prevention control system, includes freezer, terminal display, controller, differential pressure sensor, pressure sensor group, valves and at least one gas cylinder, pressure sensor group include with gas cylinder quantity assorted at least one pressure sensor, the valves include with gas cylinder quantity assorted at least one control valve, pressure sensor group, valves and gas cylinder all set up inside the freezer, the gas cylinder with the control valve is connected, the control valve with the controller is connected, the gas cylinder with pressure sensor connects, pressure sensor with the controller is connected, the freezer with differential pressure sensor connects, differential pressure sensor with the controller is connected, terminal display is connected with the controller, wherein:
the gas cylinder is used for storing low-temperature dried gas, and can be low-temperature dried compressed air or inert gas and the like;
the differential pressure sensor is used for detecting the internal pressure of the refrigeration house and the external pressure of the refrigeration house;
the controller is used for calculating to obtain pressure difference according to the current internal pressure and the external pressure of the refrigeration house; when the pressure difference reaches a first set value, the controller generates a first instruction and sends the first instruction to the control valve, the control valve is opened, and at the moment, low-temperature dry air or inert gas stored in the gas cylinder is supplemented into the refrigerator; when the pressure difference is not less than the first balance value, the controller generates a second command and sends the second command to the control valve to close the control valve;
the control valve is used for receiving a first instruction and a second instruction sent by the controller; according to the first instruction and the second instruction, the control valve is selectively opened, so that the low-temperature dry air or the inert gas stored in the gas cylinder can be transmitted to the interior of the refrigeration house, the pressure in the interior of the refrigeration house is greater than the external pressure of the refrigeration house or the pressure in the interior of the refrigeration house and the external pressure of the refrigeration house are kept balanced, and the condition of heat exchange between the interior and the exterior of the refrigeration house is damaged
The pressure sensor is used for monitoring the pressure of the gas cylinder and feeding the pressure back to the controller, and the controller receives the current pressure value of the gas cylinder; when the current pressure value of the gas cylinder reaches a second set value, the controller generates a third instruction and sends the third instruction to the terminal display, a user is prompted to replace the gas cylinder in time, gas in the gas cylinder is ensured to be filled enough for standby, sufficient gas can be supplemented for the refrigeration house in time, and the refrigeration house can reach corresponding pressure requirements.
Among the above-mentioned technical scheme, the gas cylinder is arranged in the freezer inside, and is close to unanimously with the inside temperature of freezer, consequently, the compressed gas of its release can not influence the normal work of freezer or minimum degree.
Among the above-mentioned technical scheme, the gas that stores in the gas cylinder can be the dry compressed air of low temperature or inert gas, and inert gas is because of its itself extremely stable and do not contain any impurity, when replenishing inside the freezer and flowing in the freezer, the inside refrigerated goods's of influence freezer quality that can the minimum.
Further, the number of the gas cylinders is N, wherein N is a positive integer larger than 1, the N gas cylinders are set to be a 1 st gas cylinder to an Nth gas cylinder respectively, a set pressure sensor group comprises a 1 st pressure sensor to an Nth pressure sensor which are correspondingly connected with the N gas cylinders, and a set control valve group comprises control valves correspondingly connected with the N gas cylinders and are respectively a 1 st control valve to an Nth control valve;
the 1 st pressure sensor to the Nth pressure sensor are respectively used for monitoring the pressures of the 1 st gas cylinder to the Nth gas cylinder and feeding the pressures back to the control system, and the control system receives the current pressure values of the 1 st gas cylinder to the Nth gas cylinder;
the control system performs arrangement in a set form according to the received current pressure values of the N gas cylinders, wherein the arrangement in the set form can be in an ascending order, a descending order and the like of the pressure values;
the control system analyzes the pressure values of the N gas cylinders in the current state according to the arrangement result of the setting form, and correspondingly sets the N gas cylinders from a 1 st compensation gas cylinder to an Nth compensation gas cylinder according to the pressure values of the N gas cylinders, wherein the gas cylinder with the largest pressure value in the current state is the 1 st compensation gas cylinder, the gas cylinder with the smallest pressure value in the current state is the Nth compensation gas cylinder, the 1 st compensation gas cylinder is set as a priority compensation gas cylinder, a control valve connected with the 1 st compensation gas cylinder is set as a priority control valve, and a pressure sensor connected with the 1 st compensation gas cylinder is set as a priority pressure sensor;
when the pressure difference reaches a first set value, the controller generates a first instruction and sends the first instruction to the priority control valve, and the priority control valve is opened, so that the low-temperature dry air or inert gas stored in the priority compensation gas cylinder is transmitted to the interior of the refrigeration house;
the setting pattern here means a predetermined arrangement pattern, and may be an ascending or descending arrangement pattern.
Further, when the controller receives that the current pressure value of the priority compensation gas cylinder reaches a second set value, the controller performs arrangement in a set form according to the received current pressure values of the N gas cylinders, and resets the priority compensation gas cylinder in the current state.
It should be noted that in this technical solution, when the controller receives that the current pressure value of the priority compensation gas cylinder reaches the second set value, the controller generates a third instruction, and sending a third instruction to the terminal display to prompt a user that the gas cylinder needs to be replaced when the gas amount is insufficient, which indicates that the preferential compensation gas cylinder can not be used for supplementing and transmitting gas to the refrigeration house, in this state, the controller performs a new arrangement of setting forms again according to the current pressure values of the N gas cylinders received in the current state (the meaning of the setting forms is the same as the above explanation, and is not described here again), resetting the prior compensation gas cylinder in the current state, wherein the resetting of the prior compensation gas cylinder in the current state means that, the trigger timing of the controller for the set arrangement of the N gas cylinders at the gas cylinder with the largest pressure value after the rearrangement is performed can be understood to include the following timings: firstly, when the controller receives that the current pressure value of the priority compensation gas cylinder reaches a second set value, the controller performs arrangement of a setting form again according to the received current pressure values of the N gas cylinders, and resets the priority compensation gas cylinder in the current state; and secondly, after the user finishes replacing the gas cylinders with insufficient gas quantity according to the prompt of the terminal display, the controller performs arrangement in a setting mode once according to the received current pressure values of the N gas cylinders and resets the priority compensation gas cylinders in the current state.
Further, the controller is used for storing the total available release time and the remaining available release time of the N gas cylinders;
setting the total available release time to T0The remaining available release time is TtInitial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is Pt；
The controller is T according to total available release time0The initial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is PtCalculating to obtain the residual available release time Tt；
The controller sends the total available release time and the residual available release time to a terminal display;
the total available release time is a preset value, and the total available release time is a value which is set by a design developer after comprehensive consideration of factors such as the volume of gas contained in the gas cylinder, the density of the gas, the initial pressure value of the gas cylinder (namely the pressure value which is monitored by the pressure sensor and fed back to the controller after the gas cylinder is filled with the gas), the release speed of the gas after the control valve is opened and the like0The initial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is PtCalculating to obtain the residual available release time TtThe method of (3) may be a matching method, e.g. the total available release time after comprehensive consideration of error factors is T0And the initial pressure value of the gas cylinder is P0Will equal the remaining available release time T after the error factor has been taken into accounttThe current pressure value of the gas cylinder is PtBy the ratio of (A) to (B), i.e. expressed as (T)0+δ)/P0＝(Tt+δ)/PtWherein, delta is an error factor after the error factor is considered comprehensively, and is a preset value, and the total available release time T0The initial pressure value of the gas cylinder is P for the preset known parameter value0And the current pressure value P of the gas cylindertThe residual available release time can be calculated by monitoring in real time through the pressure sensor and feeding back to the control systemt。
In the technical scheme, the control system calculates and stores the remaining available release time and sends the remaining available release time to the terminal display, so that a user can visually see the respective remaining available release time of the N gas cylinders through the terminal display, the user can have time to identify the gas cylinders needing to be replaced in advance in a planned way, the situation that the gas cylinders are exhausted due to unattended operation beside the equipment (especially under the condition that the equipment is intermittently attended in the daytime or unattended at night) is prevented, the pressure required in the refrigeration house cannot be timely compensated, and the problem of frosting or icing in the refrigeration house is caused (the gas cylinders are exhausted, and the corresponding pressure values of the gas cylinders are understood to reach the second set value).
Further, the controller analyzes the gas cylinder with the abnormal control valve according to the calculated pressure difference and the change situation of the remaining available release time, and sends the gas cylinder to the terminal display, and the specific steps include:
when the pressure difference calculated by the controller according to the current internal pressure and the external pressure of the refrigeration house is not less than a first balance value, the remaining available release time of at least one gas cylinder in the N gas cylinders is still continuously reduced, and the duration time reaches a first set time.
The gas cylinder with an abnormal control valve means a gas cylinder in which an abnormality occurs in a control valve and a gas cylinder connected to the abnormal control valve indicates that the control valve is abnormal.
It should be noted that, when the pressure difference calculated by the controller according to the current internal pressure and the external pressure of the refrigerator is not less than the first equilibrium value, the remaining available release time of at least one gas cylinder in the N gas cylinders is still continuously reduced and the duration time reaches the set time, where the set time is a preset value, the technical solution means that, when the pressure difference calculated by the controller according to the current internal pressure and the external pressure of the refrigerator is not less than the first equilibrium value, it indicates that it is no longer necessary to supplement the release gas into the refrigerator at this time, the controller controls the priority control valve of the corresponding priority compensation gas cylinder to close, but, if the terminal display indicates that the remaining available release time of at least one gas cylinder in the N gas cylinders is still continuously reduced and the duration time reaches the first set time at this time, it indicates that when the pressure difference reaches the condition state of not less than the first equilibrium value, at the moment, gas cylinders (set as target gas cylinders) continuously release gas to the refrigeration house, and the duration time reaches a preset first set time, the controller analyzes the gas cylinders which are possibly abnormal at present and feeds back the gas cylinders to the terminal display, wherein the duration time refers to the time for the controller to continuously release gas to the target gas cylinders when the pressure difference calculated according to the current internal pressure and the external pressure of the refrigeration house is not less than a first balance value, and when the duration time reaches the first set time, the controller analyzes that the control valves connected with the target gas cylinders are possibly abnormal and feeds back the control valves to the terminal display.
Further, the method for analyzing the gas cylinder with the control valve abnormal at present and feeding back the gas cylinder to the terminal display by the controller specifically comprises the following steps:
the N gas cylinders are respectively provided with corresponding position sensing devices, and the position sensing devices are connected with the controller;
each position sensing device is used for sensing a position signal of each corresponding gas cylinder and feeding the position signal back to the controller, and the controller receives the position signal of each gas cylinder and sends the position signal to the terminal display;
and the terminal display is used for displaying the state information of the gas cylinders and giving an alarm for the gas cylinders with abnormal control valves.
Further, the terminal display is used for displaying the total available release time and the remaining available release time;
the controller analyzes that when the remaining available release time of the current gas cylinder reaches a third set value, the remaining available release time of the current gas cylinder is fed back to the terminal display, and the terminal display gives an alarm for the gas cylinder of which the remaining available release time reaches the third set value in a manner different from the manner of giving an alarm for the gas cylinder of which the control valve is abnormal by the terminal display;
in the technical scheme, the terminal display displays the total available release time and the remaining available release time, and simultaneously when the remaining available release time of a certain gas cylinder reaches a third set value, the terminal display gives an alarm to prompt a user that the certain gas cylinder needs to be replaced.
Further, when the current pressure value of the gas cylinder reaches a second set value, the controller generates a third instruction and sends the third instruction to the terminal display, and the terminal display gives an alarm in the same way as the gas cylinder alarm mode when the remaining available release time reaches the third set value;
in the technical scheme, when the current pressure value of the gas cylinder reaches a second set value, the fact that the gas cylinder needs to be replaced when being exhausted is indicated, and the fact that the remaining available release time reaches a third set value also indicates that the gas cylinder needs to be replaced, therefore, in the technical characteristics, the fact that the terminal display gives an alarm in the same way as the gas cylinder with the remaining available release time reaching the third set value means that the information fed back by the terminal display and the information fed back by the terminal display are that the corresponding gas cylinder needs to be replaced, and therefore, the same way can be adopted for alarm for simplifying logic control.
Furthermore, each gas cylinder is connected with a heating device, and the heating devices are connected with the controller;
the controller is used for storing the starting time and the second set time;
setting the starting time to T0Setting the second set time to be T and setting the current time to be T1When said T is1＝T0+ NT, where N is a natural number greater than 0, and the controller controls the heating device to operate;
among this technical scheme, through heating device work, heat the gas cylinder, heat the frosting that probably produces on the gas cylinder, prevent that the gas cylinder from frosting, mainly be in order to solve the following situation that probably leads to frosting: the controller calculates to obtain pressure difference according to the current internal pressure and the external pressure of the refrigeration house, when the pressure difference reaches a first set value, the controller generates a first instruction and sends the first instruction to the control valve to open the control valve, low-temperature dry air or inert gas stored in the gas cylinder is supplemented into the refrigeration house at the moment, and the gas cylinder releases and supplements the low-temperature dry air or the inert gas into the refrigeration house so that the pressure reaching the interior of the refrigeration house is greater than the external pressure of the refrigeration house or the cold gas reaches the external pressure of the refrigeration houseThe state that the internal pressure and the external pressure of the refrigerator are balanced needs a certain time, and before the state is not reached, the internal pressure of the refrigerator is still smaller than the external pressure of the refrigerator, so that before the state is not reached, the problem that the internal of the refrigerator is frozen or frosted due to the fact that hot air outside the refrigerator enters the refrigerator still exists, and therefore in the technical scheme, the gas cylinder is heated through the heating device controlled by the controller in an intermittent mode (the intermittent mode refers to the mode that when the T is reached, the internal pressure of the refrigerator is still smaller than the external pressure of the refrigerator1＝T0+ NT, the controller controls the heating device to operate), further preventing the problem of frosting of the cylinder.
Furthermore, each gas cylinder is also connected with a drainage device for discharging water generated when the gas cylinders are heated out of a refrigeration house. Above-mentioned technical scheme carries out intermittent type nature heating to the gas cylinder through heating device work, with the frost or the ice heating of the gas cylinder upper knot, the moisture that produces after the heating passes through drainage device discharge freezer outside, guarantees that the gas cylinder normally works.
In combination with the structural characteristics of the utility model, compared with the prior art, the frost prevention control system provided by the utility model comprises a refrigeration house, a terminal display, a controller, a differential pressure sensor, a pressure sensor group, a control valve group and at least one gas cylinder, the pressure sensor group comprises at least one pressure sensor matched with the number of the air cylinders, the control valve group comprises at least one control valve matched with the number of the air cylinders, the pressure sensor group, the control valve group and the gas cylinder are all arranged in the refrigeration house, the gas cylinder is connected with the control valve, the control valve is connected with the controller, the gas cylinder is connected with the pressure sensor, the pressure sensor is connected with the controller, the refrigeration house is connected with the differential pressure sensor, the differential pressure sensor is connected with the controller, and the terminal display is connected with the controller; this technical scheme, the low temperature drying gas who stores in the gas cylinder tends to unanimity with the inside operating temperature of freezer all the time in balance, make the low temperature drying gas that the gas cylinder released can not or the temperature of the influence freezer of minimum, can not influence the normal work of freezer, in addition, through the controller with the gas cylinder surplus available release time, the unusual gas cylinder of control valve, information transmission such as gas cylinder current pressure value is to terminal display system, report to the police to the distinguishing mode of gas cylinder abnormal state information, very big improvement is intelligent, make the user can be timely, the state of rapid differentiateing the gas cylinder, and the planned implementation gas cylinder is changed or is examined.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic diagram of an anti-frost control system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an anti-frost control system according to a second embodiment of the present invention.
Fig. 3 is a schematic diagram of an anti-frost control system according to a ninth embodiment of the present invention.
Fig. 4 is a schematic diagram of an anti-frost control system according to a tenth embodiment of the present invention.
Fig. 5 is a schematic diagram of a terminal display provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, a frost prevention control system, including freezer, terminal display, controller, differential pressure sensor, pressure sensor group, valve unit and at least one gas cylinder, pressure sensor group include with gas cylinder quantity assorted at least one pressure sensor, valve unit include with gas cylinder quantity assorted at least one control valve, pressure sensor group, valve unit and gas cylinder all set up inside the freezer, the gas cylinder with the control valve is connected, the control valve with the controller is connected, the gas cylinder with pressure sensor connects, pressure sensor with the controller is connected, the freezer with differential pressure sensor connects, differential pressure sensor with the controller is connected, terminal display is connected with the controller, wherein:
the gas cylinder is used for storing low-temperature dried gas, and can be low-temperature dried compressed air or inert gas and the like;
the differential pressure sensor is used for detecting the internal pressure of the refrigeration house and the external pressure of the refrigeration house;
the controller is used for calculating to obtain pressure difference according to the current internal pressure and the external pressure of the refrigeration house; when the pressure difference reaches a first set value, the controller generates a first instruction and sends the first instruction to the control valve, the control valve is opened, and at the moment, low-temperature dry air or inert gas stored in the gas cylinder is supplemented into the refrigerator; when the pressure difference is not less than the first balance value, the controller generates a second command and sends the second command to the control valve to close the control valve;
the control valve is used for receiving a first instruction and a second instruction sent by the controller; according to the first command and the second command, the control valve is selectively opened, so that the low-temperature dry air or the inert gas stored in the gas cylinder can be transmitted to the interior of the refrigeration house, the pressure in the interior of the refrigeration house is greater than the pressure outside the refrigeration house or the pressure inside the refrigeration house and the pressure outside the refrigeration house are kept balanced, and the condition of cold and heat exchange between the interior and the exterior of the refrigeration house is damaged.
The pressure sensor is used for monitoring the pressure of the gas cylinder and feeding the pressure back to the controller, and the controller receives the current pressure value of the gas cylinder; when the current pressure value of the gas cylinder reaches a second set value, the controller generates a third instruction and sends the third instruction to the terminal display, a user is prompted to replace the gas cylinder in time, gas in the gas cylinder is ensured to be filled enough for standby, sufficient gas can be supplemented for the refrigeration house in time, and the refrigeration house can reach corresponding pressure requirements.
In the technical scheme, the gas cylinder is arranged in the refrigeration house, and the temperature of the gas cylinder is consistent with the temperature of the interior of the refrigeration house, so that the released compressed gas can not influence the normal work of the refrigeration house or the minimum degree of the compressed gas can influence the normal work of the refrigeration house, the gas stored in the gas cylinder can be the compressed air or the inert gas with low temperature drying, the inert gas does not contain any impurity because of the stability, and the quality of refrigerated goods in the refrigeration house can be influenced to the minimum degree when the gas cylinder is supplemented to the interior of the refrigeration house and flows in the interior of the refrigeration house.
Example two
The number of the gas cylinders is N, wherein N is a positive integer larger than 1, the N gas cylinders are set to be the 1 st gas cylinder to the Nth gas cylinder respectively, the set pressure sensor group comprises the 1 st pressure sensor to the Nth pressure sensor corresponding to the N gas cylinders, and the set control valve group comprises the 1 st control valve to the Nth control valve corresponding to the N gas cylinders;
the 1 st pressure sensor to the Nth pressure sensor are respectively used for monitoring the pressures of the 1 st gas cylinder to the Nth gas cylinder and feeding the pressures back to the control system, and the control system receives the current pressure values of the 1 st gas cylinder to the Nth gas cylinder;
the control system performs arrangement in a set form according to the received current pressure values of the N gas cylinders, wherein the arrangement in the set form can be in an ascending order, a descending order and the like of the pressure values;
the control system analyzes the pressure values of the N gas cylinders in the current state according to the arrangement result of the setting form, and correspondingly sets the N gas cylinders from a 1 st compensation gas cylinder to an Nth compensation gas cylinder according to the pressure values of the N gas cylinders, wherein the gas cylinder with the largest pressure value in the current state is the 1 st compensation gas cylinder, the gas cylinder with the smallest pressure value in the current state is the Nth compensation gas cylinder, the 1 st compensation gas cylinder is set as a priority compensation gas cylinder, a control valve connected with the 1 st compensation gas cylinder is set as a priority control valve, and a pressure sensor connected with the 1 st compensation gas cylinder is set as a priority pressure sensor;
when the pressure difference reaches a first set value, the controller generates a first instruction and sends the first instruction to the priority control valve, and the priority control valve is opened, so that the low-temperature dry air or the inert gas stored in the priority compensation gas cylinder is transmitted to the interior of the refrigeration house.
As shown in fig. 2, in this embodiment, the number of the gas cylinders is 2, the gas cylinders are respectively a 1 st gas cylinder and a 2 nd gas cylinder, the pressure sensor group includes a 1 st pressure sensor and a 2 nd pressure sensor, and the control valve group includes a 1 st control valve and a 2 nd control valve, wherein the 1 st gas cylinder is connected with the 1 st control valve, the 1 st control valve is connected with the controller, the 1 st gas cylinder is connected with the 1 st pressure sensor, and the 1 st pressure sensor is connected with the controller; the 2 nd gas cylinder is connected with the 2 nd control valve, the 2 nd control valve is connected with the controller, the 2 nd gas cylinder is connected with the 2 nd pressure sensor, the 2 nd pressure sensor is connected with the controller.
It should be noted that, the setting form in this technical scheme refers to a preset arrangement form, which may be an ascending order, a descending order or other arrangement forms, in this embodiment, the control system performs descending order on the magnitude of the pressure values of the received 1 st gas cylinder and 2 nd gas cylinder, when the current pressure value of the 1 st gas cylinder is greater than the pressure value of the 2 nd gas cylinder, the 1 st gas cylinder is set as a 1 st compensation gas cylinder (i.e. a priority compensation gas cylinder), the 2 nd gas cylinder is set as a 2 nd compensation gas cylinder, when the controller calculates and obtains a pressure difference to reach a first set value according to the current internal pressure and external pressure of the refrigerator, the controller generates a first instruction, and sends the first instruction to a priority control valve connected to the 1 st gas cylinder, and opens the priority control valve, in this technical scheme, the control system arranges the gas cylinders according to the received pressure values of the respective gas cylinders, the gas cylinder with the largest pressure value under the current state is analyzed, and the gas cylinder is set as the priority compensation gas cylinder, so that the gas cylinder with the most sufficient gas quantity is preferentially selected to be supplemented and transmitted when gas is required to be supplemented into the refrigeration house, and the situation that the internal pressure of the refrigeration house is difficult to be fully compensated due to insufficient gas quantity in the gas cylinder is avoided.
EXAMPLE III
In this embodiment, when the controller receives that the current pressure value of the priority compensation gas cylinder reaches the second set value, the controller performs arrangement in a set form according to the received current pressure values of the N gas cylinders, and resets the priority compensation gas cylinder in the current state.
It should be noted that, in this technical solution, when the controller receives that the current pressure value of the priority compensation gas cylinder reaches the second set value, the controller generates a third instruction and sends the third instruction to the terminal display to prompt the user that the gas cylinder has insufficient gas volume and needs to be replaced, which indicates that the priority compensation gas cylinder cannot be used for supplementing and delivering gas to the refrigerator, in this state, the controller performs a re-arrangement of a setting form again according to the current pressure values of the N gas cylinders received in the current state (the meaning of the setting form is the same as the definition in the second embodiment, which is not described here again), and resets the priority compensation gas cylinder in the current state, and the resetting of the priority compensation gas cylinder in the current state means that the gas cylinder after the re-arrangement has the maximum pressure value, in the above embodiment, in the beginning, the current pressure value of the 1 st cylinder is greater than the pressure value of the 2 nd cylinder, after the arrangement according to the setting form, the 1 st cylinder is a 1 st compensated cylinder (i.e. a priority compensated cylinder), the 2 nd cylinder is a 2 nd compensated cylinder, when the controller receives that the current pressure value of the priority compensated cylinder (i.e. the 1 st cylinder) reaches a second setting value, the controller generates a third instruction and sends the third instruction to the terminal display to prompt the user that the 1 st cylinder is insufficient in gas volume and needs to be replaced, the controller performs the arrangement in the setting form again according to the current pressure values of the 2 cylinders received in the current state, at this time, the pressure value of the 2 nd compensated cylinder (i.e. the 2 nd cylinder) is greater than the 1 st cylinder (i.e. the 1 st compensated cylinder/priority compensated cylinder in the history state, i.e. the priority compensated cylinder in the 1 st arrangement, hereinafter referred to as a history priority compensation cylinder), the controller performs reset setting at this time, sets the 2 nd compensation cylinder as the priority compensation cylinder in the current state, sets the 2 nd control valve connected with the 2 nd compensation cylinder as the priority control valve, and sets the 2 nd pressure sensor connected with the 2 nd compensation cylinder as the priority pressure sensor.
Then, if the pressure value of the historical priority compensation gas cylinder reaches a second set value, the historical priority compensation gas cylinder indicates that the historical priority compensation gas cylinder cannot supply supplementary gas to the interior of the refrigeration house, and the pressure difference between the interior and the exterior of the refrigeration house does not reach the condition of being not less than a first balance value, the controller generates a first instruction, sends the first instruction to the reset priority control valve, and opens the reset priority control valve; if the pressure value of the historical priority compensation gas cylinder reaches the second set value and the pressure difference between the inside and the outside of the refrigeration house reaches the condition of being not less than the first balance value, the controller does not send a first instruction to the reset priority control valve to open the valve at present, but calculates the pressure difference to reach the first set value according to the current internal pressure and the external pressure of the refrigeration house at the next time, and then opens the control of the reset priority control valve according to the set arrangement result of each gas cylinder.
Thus, the activation timings of the controller for the set arrangement of each N cylinders can be understood to include the following timings:
firstly, in the above scheme, when the controller receives that the current pressure value of the priority compensation gas cylinder reaches a second set value, the controller performs a new arrangement of a setting form according to the received current pressure values of the N gas cylinders, and resets the priority compensation gas cylinder in the current state;
secondly, after the user finishes replacing the gas cylinders with insufficient gas amount according to the prompt of the terminal display, the controller is triggered to perform arrangement in a setting mode once according to the received current pressure values of the N gas cylinders, and the priority compensation gas cylinders in the current state are reset.
EXAMPLE III
The controller is used for storing the total available release time and the remaining available release time of the N gas cylinders;
setting the total available release time to T0The remaining available release time is TtInitial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is Pt；
The controller is T according to total available release time0The initial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is PtCalculating to obtain the residual available release time Tt；
The controller sends the total available release time and the residual available release time to a terminal display;
the total available release time is a preset value, and the total available release time is a value set by a design developer after comprehensive consideration of factors such as the volume of gas contained in the gas cylinder, the density of the gas, the initial pressure value of the gas cylinder (i.e., the pressure value which is monitored by the pressure sensor and fed back to the controller after the gas cylinder is filled with the gas), the release speed of the gas after the control valve is opened, and the like0The initial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is PtCalculating to obtain the residual available release time TtThe method of (3) may be a matching method, e.g. the total available release time after comprehensive consideration of error factors is T0And the initial pressure value of the gas cylinder is P0Will be equal to the remaining available release time T after the error factor is taken into accounttThe current pressure value of the gas cylinder is PtBy the ratio of (A) to (B), i.e. expressed as (T)0+δ)/P0＝(Tt+δ)/PtWherein, delta is an error factor after the error factor is considered comprehensively, and is a preset value, and the total available release time T0The initial pressure value of the gas cylinder is P for the preset known parameter value0And the current pressure value P of the gas cylindertThe residual available release time can be calculated by monitoring in real time through the pressure sensor and feeding back to the control systemt。
In this embodiment, the control system stores and transmits the calculated remaining available release time to the terminal display, so that the user can visually see the remaining available release time of each of the N gas cylinders through the terminal display, as shown in fig. 5, a schematic diagram of the terminal display when the number of the gas cylinders is 2 (fig. 5 is only a schematic diagram for explaining basic display contents of the terminal display, and does not represent interface contents in an actual implementation process and an actual setting position of a simulated gas cylinder legend, etc., XX minutes and XX seconds in XX of the total available release time and the remaining available release time in fig. 5 are measured as time, such as 50 minutes and 35 seconds when the remaining available release time is 01, so that the user can have time to programmatically identify the gas cylinders needing to be replaced in advance, and prevent the gas cylinders from being exhausted due to unattended operation beside the device (especially, in case of intermittent day time or unattended operation at night), the problem of frosting or icing inside the refrigeration house is caused because the required pressure inside the refrigeration house cannot be timely compensated (the gas cylinder is exhausted, and the corresponding pressure value of the gas cylinder reaches the second set value).
EXAMPLE five
The controller analyzes the gas cylinder with the possible control valve abnormality according to the calculated pressure difference and the change condition of the remaining available release time, and sends the gas cylinder to the terminal display, and the method specifically comprises the following steps:
when the pressure difference calculated by the controller according to the current internal pressure and the external pressure of the refrigeration house is not less than a first balance value, the remaining available release time of at least one gas cylinder in the N gas cylinders is still continuously reduced, and the duration time reaches a first set time.
The gas cylinder with an abnormal control valve means a gas cylinder in which an abnormality occurs in a control valve and a gas cylinder connected to the abnormal control valve indicates that the control valve is abnormal.
It should be noted that, when the pressure difference calculated by the controller according to the current internal pressure and the external pressure of the refrigerator is not less than the first equilibrium value, the remaining available release time of at least one gas cylinder in the N gas cylinders is still continuously reduced and the duration time reaches the set time, where the set time is a preset value, the technical solution means that, when the pressure difference calculated by the controller according to the current internal pressure and the external pressure of the refrigerator is not less than the first equilibrium value, it indicates that it is no longer necessary to supplement the release gas into the refrigerator at this time, the controller controls the priority control valve of the corresponding priority compensation gas cylinder to close, but, if the terminal display indicates that the remaining available release time of at least one gas cylinder in the N gas cylinders is still continuously reduced and the duration time reaches the first set time at this time, it indicates that when the pressure difference reaches the condition state of not less than the first equilibrium value, at the moment, gas cylinders (set as target gas cylinders) continuously release gas to the refrigeration house, and the duration time reaches a preset first set time, the controller analyzes the gas cylinders which are possibly abnormal at present and feeds back the gas cylinders to the terminal display, wherein the duration time refers to the time for the controller to continuously release gas to the target gas cylinders when the pressure difference calculated according to the current internal pressure and the external pressure of the refrigeration house is not less than a first balance value, and when the duration time reaches the first set time, the controller analyzes that the control valves connected with the target gas cylinders are possibly abnormal and feeds back the control valves to the terminal display.
EXAMPLE six
The method for analyzing the gas cylinder with the control valve abnormal at present by the controller and feeding back the gas cylinder to the terminal display specifically comprises the following steps:
the N gas cylinders are respectively provided with corresponding position sensing devices, and the position sensing devices are connected with the controller;
each position sensing device is used for sensing a position signal of each corresponding gas cylinder and feeding the position signal back to the controller, and the controller receives the position signal of each gas cylinder and sends the position signal to the terminal display;
the terminal display is used for displaying the state information of the gas cylinders and giving an alarm for the gas cylinders with abnormal control valves;
in the embodiment shown in fig. 4, the number of the gas cylinders is 2, which are respectively a 1 st gas cylinder and a 2 nd gas cylinder, a 1 st position sensing device and a 2 nd position sensing device are respectively arranged on the 1 st gas cylinder and the 2 nd gas cylinder, the 1 st position sensing device senses that the 1 st gas cylinder is a 1 st position, the 2 nd position sensing device senses that the 2 nd gas cylinder is a 2 nd position, the position signal refers to signal information of the 1 st gas cylinder corresponding to the 1 st position and the 2 nd gas cylinder corresponding to the 2 nd position, the 1 st position sensing device and the 2 nd position sensing device feed back the signal information to the controller, the controller converts the signal information into a corresponding instruction and sends the corresponding instruction to the terminal display for display, the terminal display can display in a gas cylinder simulating mode marked with gas cylinder position information, and when a target gas cylinder which is analyzed by the controller and may have an abnormal control valve at present is received, for example, if the 1 st gas cylinder is a target gas cylinder with an abnormal control valve, the simulated gas cylinder correspondingly displayed on the terminal display will be changed into red or other striking colors for alarming, the alarming mode is not limited to alarming by different colors, and other modes which can be used for distinguishing the normal gas cylinder from the abnormal target gas cylinder fall within the protection scope of the utility model.
EXAMPLE seven
The terminal display is used for displaying the total available release time and the remaining available release time;
the controller analyzes that when the remaining available release time of the current gas cylinder reaches a third set value, the remaining available release time of the current gas cylinder is fed back to the terminal display, and the terminal display gives an alarm for the gas cylinder of which the remaining available release time reaches the third set value in a manner different from the manner of giving an alarm for the gas cylinder of which the control valve is abnormal by the terminal display;
in this embodiment, while the terminal display displays the total available release time and the remaining available release time, when the remaining available release time of a certain gas cylinder reaches a third set value, the terminal display gives an alarm to prompt a user that the certain gas cylinder needs to be replaced, wherein the technical feature of "the terminal display gives an alarm in a manner that the terminal display distinguishes that the gas cylinder whose remaining available release time reaches the third set value from the gas cylinder whose control valve is abnormal" when receiving that the current 1 st gas cylinder analyzed by the controller is the target gas cylinder whose control valve is abnormal, the simulated gas cylinder correspondingly displayed on the terminal display of the 1 st gas cylinder will turn into red for alarm, and if the remaining available release time of the 2 nd gas cylinder reaches the third set value (that is, the 2 nd gas cylinder is exhausted and needs to be replaced), the simulated gas cylinder correspondingly displayed on the terminal display of the 2 nd gas cylinder can give an alarm in another color different from the red for alarm For example, the alarm can be given by green, and the main purpose is to facilitate visual operation and to facilitate users to quickly know whether the corresponding alarm reason of the gas cylinder is that the control valve is abnormal or the gas quantity is insufficient and needs to be replaced according to different alarm colors.
Example eight
In this embodiment, when the current pressure value of the gas cylinder reaches the second set value, the controller generates a third instruction and sends the third instruction to the terminal display, and the terminal display gives an alarm in the same manner as the gas cylinder alarm in which the remaining available release time reaches the third set value;
in this embodiment, when the current pressure value of the gas cylinder reaches the second set value, it indicates that the gas cylinder needs to be replaced when the gas cylinder is exhausted, and the remaining available release time reaches the third set value, which also indicates that the gas cylinder needs to be replaced, so that "the terminal display gives an alarm in the same way as the gas cylinder with the remaining available release time reaching the third set value" in the above technical features means that the information fed back by both the terminal display and the gas cylinder needs to be replaced, so that the same way can be adopted for alarm to simplify the logic control, for example, in this embodiment, when the current pressure value of the gas cylinder reaches the second set value and the remaining available release time reaches the third set value, the user can give an alarm in green, and according to the color of the green alarm, the user can quickly know that the corresponding gas cylinder alarm reason is that the gas volume is insufficient and needs to be replaced, this technical scheme is in order to further ensure the warning promptness when the gas cylinder exhausts, and the user that can not be in time indicateed to change is caused by the reasons such as the feedback lag or the trouble of the remaining available release time of placing the gas cylinder.
Example nine
As shown in fig. 3, in this embodiment, each gas cylinder is connected with a heating device, and the heating device is connected with the controller;
the controller is used for storing the starting time and the second set time;
setting the starting time to T0Setting the second set time to be T and setting the current time to be T1When said T is1＝T0+ NT, where N is a natural number greater than 0, and the controller controls the heating device to operate;
in this embodiment, through heating device work, heat the gas cylinder, heat the frosting that probably produces on the gas cylinder, prevent that the gas cylinder from frosting, mainly be in order to solve the following situation that probably leads to frosting: the controller calculates to obtain a pressure difference according to the current internal pressure and the external pressure of the refrigerator, when the pressure difference reaches a first set value, the controller generates a first instruction and sends the first instruction to the control valve to open the control valve, at the moment, the low-temperature dry air or the inert gas stored in the gas cylinder is supplemented into the refrigerator, the gas cylinder releases the supplemented low-temperature dry air or the inert gas into the refrigerator to enable the pressure reaching the inside of the refrigerator to be greater than the external pressure of the refrigerator or the internal and external pressures of the refrigerator are kept balanced, a certain time is needed, before the state is not reached, the pressure inside the refrigerator is still less than the external pressure of the refrigerator, therefore, before the state is not reached, the problem that the hot air outside the refrigerator enters the inside of the refrigerator to cause the freezing or frosting of the inside of the refrigerator still exists, therefore, in the technical scheme, the heating device is controlled to heat the gas cylinder by the controller in an 'intermittent' mode (the intermittent mode refers to the mode that when T is reached1＝T0+ NT, the controller controls the heating device to operate), further preventing the problem of frosting of the cylinder.
Example ten
As shown in fig. 4, in this embodiment, each gas cylinder is further connected with a water discharge device for discharging water generated when the gas cylinder is heated out of a refrigerator. Through heating device work, carry out intermittent type nature heating to the gas cylinder, with the frost or the ice heating of the knot on the gas cylinder, the moisture that produces after the heating passes through drainage device and discharges the freezer outside, guarantees that the gas cylinder normally works.
The applicant asserts that the above-described embodiments merely represent the basic principles, principal features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, and that various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the utility model, which will fall within the scope of the utility model as claimed.
The present invention is not limited to the above embodiments, and all embodiments adopting the similar structure and method to achieve the object of the present invention are within the protection scope of the present invention.
Claims (10)
1. A frost prevention control system, characterized by: including freezer, terminal display, controller, differential pressure sensor, pressure sensor group, valve unit and at least one gas cylinder, pressure sensor group include with gas cylinder quantity assorted pressure sensor, the valve unit include with gas cylinder quantity assorted control valve, pressure sensor group, valve unit and gas cylinder all set up inside the freezer, the gas cylinder with the control valve is connected, the control valve with the controller is connected, the gas cylinder with pressure sensor connects, pressure sensor with the controller is connected, the freezer with differential pressure sensor connects, differential pressure sensor with the controller is connected, the terminal display is connected with the controller, wherein:
the gas cylinder is used for storing low-temperature dried gas;
the differential pressure sensor is used for detecting the internal pressure of the refrigeration house and the external pressure of the refrigeration house;
the controller is used for calculating to obtain pressure difference according to the current internal pressure and the external pressure of the refrigeration house;
the control valve is used for receiving a first instruction and a second instruction sent by the controller; the control valve is selectively opened according to the first command and the second command;
the pressure sensor is used for monitoring the pressure of the gas cylinder and feeding back the pressure to the controller, and the controller receives the current pressure value of the gas cylinder.
2. The frost prevention control system of claim 1, wherein: the number of the gas cylinders is N, wherein N is a positive integer larger than 1, the N gas cylinders are set to be the 1 st gas cylinder to the Nth gas cylinder respectively, the set pressure sensor group comprises the 1 st pressure sensor to the Nth pressure sensor which are correspondingly connected with the N gas cylinders, and the set control valve group comprises the 1 st control valve to the Nth control valve which are correspondingly connected with the N gas cylinders respectively;
the 1 st pressure sensor to the Nth pressure sensor are respectively used for monitoring the pressures of the 1 st gas cylinder to the Nth gas cylinder and feeding the pressures back to the control system, and the control system receives the current pressure values of the 1 st gas cylinder to the Nth gas cylinder;
the control system performs arrangement in a set form according to the received current pressure values of the N gas cylinders;
the control system analyzes the pressure values of the N gas cylinders in the current state according to the arrangement result of the setting form, and correspondingly sets the N gas cylinders to be a 1 st compensation gas cylinder to an Nth compensation gas cylinder respectively according to the pressure values of the N gas cylinders, wherein the gas cylinder with the largest pressure value in the current state is the 1 st compensation gas cylinder, the gas cylinder with the smallest pressure value in the current state is the Nth compensation gas cylinder, the 1 st compensation gas cylinder is set as a priority compensation gas cylinder, a control valve connected with the 1 st compensation gas cylinder is set as a priority control valve, and a pressure sensor connected with the 1 st compensation gas cylinder is set as a priority pressure sensor;
when the pressure difference reaches a first set value, the controller generates a first command and sends the first command to the priority control valve to open the priority control valve.
3. The frost prevention control system of claim 2, wherein: when the controller receives that the current pressure value of the priority compensation gas cylinder reaches a second set value, the controller performs arrangement in a set form according to the received current pressure values of the N gas cylinders and resets the priority compensation gas cylinder in the current state.
4. The frost prevention control system according to any of claims 1 to 3, wherein: the controller is used for storing the total available release time and the remaining available release time of the N gas cylinders;
setting the total available release time to T0The remaining available release time is TtInitial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is Pt；
Setting an error factor to be delta;
the controller is T according to total available release time0The initial pressure value of the gas cylinder is P0The current pressure value of the gas cylinder is PtCalculating the error factor delta to obtain the residual available release time Tt；
The controller sends the total available release time and the residual available release time to a terminal display;
the total available release time and the error factor are preset values.
5. The frost prevention control system of claim 4, wherein: the controller analyzes the gas cylinder with the abnormal control valve according to the calculated pressure difference and the change condition of the remaining available release time, and sends the gas cylinder to the terminal display, and the method specifically comprises the following steps:
when the pressure difference calculated by the controller according to the current internal pressure and the external pressure of the refrigeration house is not less than a first balance value, the remaining available release time of at least one gas cylinder in the N gas cylinders is still continuously reduced, and the duration time reaches a first set time.
6. The frost prevention control system of claim 5, wherein: the method for analyzing the gas cylinder with the abnormal control valve and feeding the gas cylinder back to the terminal display by the controller specifically comprises the following steps:
the N gas cylinders are respectively provided with corresponding position sensing devices, and the position sensing devices are connected with the controller;
each position sensing device is used for sensing a position signal of each corresponding gas cylinder and feeding the position signal back to the controller, and the controller receives the position signal of each gas cylinder and sends the position signal to the terminal display;
and the terminal display is used for displaying the state information of the gas cylinders and giving an alarm for the gas cylinders with abnormal control valves.
7. The frost prevention control system of claim 6, wherein: the terminal display is used for displaying the total available release time and the remaining available release time;
and the controller analyzes that when the remaining available release time of the current gas cylinder reaches a third set value, the remaining available release time of the current gas cylinder is fed back to the terminal display, and the terminal display gives an alarm in a mode different from a mode of giving an alarm to the gas cylinder with an abnormal control valve by the terminal display.
8. The frost prevention control system of claim 7, wherein: and when the current pressure value of the gas cylinder reaches a second set value, the controller generates a third instruction and sends the third instruction to the terminal display, and the terminal display gives an alarm in the same way as the gas cylinder alarm mode when the residual available release time reaches the third set value.
9. The frost prevention control system according to any of claims 1 or 2, wherein: each gas cylinder is connected with a heating device, and the heating devices are connected with the controller;
the controller is used for storing the starting time and the second set time;
setting the starting time to T0Setting the set time to be T and setting the current time to be T1When said T is1＝T0+ NT time, itAnd N is a natural number greater than 0, and the controller controls the heating device to work.
10. The frost prevention control system of claim 9, wherein: and each gas cylinder is also connected with a drainage device.
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| CN202122604349.4U CN216868912U (en) | 2021-10-28 | 2021-10-28 | Frost prevention control system |
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| CN114152023A (en) * | 2021-10-28 | 2022-03-08 | 深圳市爱康生物科技股份有限公司 | Frost prevention control system |
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| CN114152023A (en) * | 2021-10-28 | 2022-03-08 | 深圳市爱康生物科技股份有限公司 | Frost prevention control system |
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