CN216481784U - Anti-frosting system - Google Patents
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- CN216481784U CN216481784U CN202122604623.8U CN202122604623U CN216481784U CN 216481784 U CN216481784 U CN 216481784U CN 202122604623 U CN202122604623 U CN 202122604623U CN 216481784 U CN216481784 U CN 216481784U
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Abstract
The utility model discloses an anti-frosting system which comprises a control system, an air compressor, an air storage tank, a first freezing type air dryer, a first control valve, a differential pressure sensor and a refrigeration house, wherein the control system is connected with the air compressor, the air compressor is connected with the air storage tank, the air storage tank is connected with the first freezing type air dryer, the refrigeration house is connected with the differential pressure sensor, the differential pressure sensor is connected with the control system, the control system is connected with the first control valve, the first control valve is connected with the first freezing type air dryer, and the first control valve is connected with the refrigeration house. According to the anti-frosting system disclosed by the utility model, compressed air compressed by the air compressor is stored by the air storage tank, the air storage tank has a natural cooling process, and then the air storage tank is connected with the first refrigeration type air dryer for drying and refrigeration, so that the energy consumption is greatly reduced, and the economy is improved.
Description
Technical Field
The utility model relates to the technical field of refrigeration, in particular to an anti-frosting 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 the continuous effective operation of automation equipment, like the automation equipment of insulated door department of automation freezer, frosting or fogging take place most easily, just corresponding automation equipment inefficacy. In the prior art, as in patents CN206019134U and CN106152679A, the temperature fluctuation range of the automatic refrigeration house is controlled by designing the buffer chamber, and the air curtain is adopted at the door of the refrigeration house to block the outside air from entering the refrigeration house, but the design of the air curtain can bring in water vapor when part of the air enters the refrigeration house, and the water vapor freezes when meeting cold, therefore, at present, the door of the refrigeration house is closed during the process of storing and taking articles, and there is still a great technical improvement space for the problem of frosting or fog water condensation at the door of the automatic refrigeration house.
SUMMERY OF THE UTILITY MODEL
The utility model provides an anti-frosting system for overcoming the defects in the prior art.
The utility model is realized by the following technical scheme:
an anti-frosting system comprises a control system, an air compressor, an air storage tank, a first freezing type air dryer, a first control valve, a differential pressure sensor and a refrigeration house, wherein the control system is connected with the air compressor, the air compressor is connected with the air storage tank, the air storage tank is connected with the first freezing type air dryer, the refrigeration house is connected with the differential pressure sensor, the differential pressure sensor is connected with the control system, the control system is connected with the first control valve, the first control valve is connected with the first freezing type air dryer, and the first control valve is connected with the refrigeration house;
the air storage tank is used for storing compressed air compressed by the air compressor;
the first freezing type air dryer is used for cooling and drying the compressed air in the air storage tank, so that the compressed air entering the refrigeration house is ensured to be dried, and water vapor is prevented from being brought into the refrigeration house;
the differential pressure sensor is used for detecting the internal pressure of the refrigeration house and the external pressure of the refrigeration house;
the control system 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 control system generates a first instruction and sends the first instruction to the first control valve, the first control valve is opened, and at the moment, the low-temperature drying air passing through the first refrigeration type air dryer is supplemented into the refrigeration house; when the pressure difference is not less than the first balance value, the control system generates a second command and sends the second command to the first control valve to close the first control valve;
the first control valve is used for receiving a first instruction and a second instruction sent by the control system; according to the first command and the second command, the first control valve is selectively opened, so that the low-temperature drying air passing through the first freezing type air dryer can be transmitted to the interior of the refrigeration house, the pressure in the refrigeration house is larger 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 heat exchange between the inside and the outside of the refrigeration house is damaged.
The compressed air after the air compressor is compressed is stored through the air storage tank, the air storage tank has a natural cooling process, and then the air storage tank is connected with the first freezing type air dryer to be connected for drying and refrigeration, so that the energy consumption is greatly reduced, and the economical efficiency is improved.
Furthermore, at least one oil mist separator is connected between the air compressor and the air storage tank and used for removing and purifying oil mist of compressed air compressed by the air compressor and then enabling the oil mist to enter the air storage tank for storage, and the collected oil mist is discharged to be relatively clean compressed air to purify the compressed air.
Furthermore, at least one filtering device is connected between the first control valve and the first freezing type air dryer, compressed air in the air storage tank is filtered through the filtering device to remove impurities in the compressed air and ensure that the compressed air entering the cold storage is clean, and the filtering devices can be multiple groups and respectively filter particles with different sizes to obtain required clean air. When the control system sends a first instruction to the first control valve, and the first control valve is opened, compressed air in the air storage tank is subjected to cooling and drying treatment by the first freezing type air dryer, and then is conveyed into the refrigeration house after impurities are filtered by the filtering device.
Further, the control system further comprises a first pressure sensor, the control system is connected with the first pressure sensor, and the first pressure sensor is connected with the air storage tank;
the first pressure sensor is used for monitoring the pressure of the gas storage tank and feeding the pressure back to the control system, and the control system receives the current pressure value of the gas storage tank;
when the current pressure value of the air storage tank reaches a second set value, the control system generates a third instruction and sends the third instruction to the air compressor, the air compressor is opened, and compressed air is supplemented to the air storage tank, namely the air compressor conveys compressed air to the air storage tank so as to supplement the compressed air in the air storage tank;
and when the current pressure value of the air storage tank reaches a third set value, the control system generates a fourth instruction and sends the fourth instruction to the air compressor to close the air compressor. Above-mentioned technical scheme through the pressure in the first pressure sensor real-time supervision gas holder to ensure that the compressed air in the gas holder keeps sufficient state constantly, when guaranteeing to carry cold air to the freezer is inside, the compressed air in the gas holder can fully supply the cold air and carry the demand.
Furthermore, the refrigeration house comprises a refrigeration house body, wherein a cabin door and an access door are arranged on the refrigeration house body, the cabin door is used for the entry and exit of refrigerated articles, the access door is used for entering the interior of the refrigeration house by opening the access door when the refrigerated articles need to enter the refrigeration house manually for maintenance, a first sensing device is connected to the cabin door, a second sensing device is connected to the access door, and the first sensing device and the second sensing device are connected with a control system;
the first sensing device is used for sensing the opening and closing of the cabin door and feeding back signals of the opening and closing of the cabin door to the control system;
the second sensing device is used for sensing the opening and closing of the access door and feeding back the opening and closing signals of the access door to the control system;
the control system is used for receiving signals fed back by the first sensing device and the second sensing device, and selectively controls the first control valve to be opened and closed according to the received signals.
Further, when the control system receives a hatch door or access door opening signal fed back by the first sensing device or the second sensing device, the control system generates a fifth instruction, sends the fifth instruction to the first control valve, opens the first control valve, and supplements the low-temperature drying air passing through the first freezing type air dryer to the inside of the refrigeration house; when the control system receives a signal fed back by the first sensing device or the second sensing device that the cabin door or the access door is closed and calculates that the obtained pressure difference is not less than a first balance value according to the current internal pressure and the current external pressure of the refrigeration house, the control system generates a sixth instruction and sends the sixth instruction to the first control valve to close the first control valve. The opening and closing states of the cabin door and the access door are sensed through the first sensing device and the second sensing device respectively, when the first sensing device and the second sensing device sense the cabin door or the access door in the opening state, a signal of the opening state of the cabin door or the access door is fed back to the control system, the control system controls the first control valve to be opened, and low-temperature drying air passing through the first freezing type air dryer is conveyed to the refrigeration house, so that the pressure inside the refrigeration house is greater than the external pressure of the refrigeration house or the internal pressure and the external pressure of the refrigeration house are kept balanced.
Therefore, the technical proposal respectively senses the opening and closing states of the cabin door and the access door through the first sensing device and the second sensing device, when the first sensing device and the second sensing device sense that the cabin door or the access door is in the opening state, the signal of the opening state of the cabin door or the access door is fed back to the control system, the control system controls the first control valve to be opened, the low-temperature drying air passing through the first freezing type air dryer is transmitted to the refrigeration house, the compressed air of the low-temperature drying is automatically supplemented into the refrigeration house, the pressure in the refrigeration house is increased to be larger than the external pressure of the refrigeration house or the internal and external pressures of the refrigeration house are kept balanced, the cold and heat exchange of the inside and the outside of the refrigeration house caused by the opening of a cabin door or an access door is prevented, the external hot air is prevented from entering the refrigeration house, thereby avoiding the phenomena of icing or frosting inside the cold storage, the cabin door, the access door and other connecting parts inside and outside the cold storage.
The refrigeration system further comprises at least one spare gas cylinder and second control valves matched with the spare gas cylinders in number, wherein the spare gas cylinders and the second control valves are arranged in the refrigeration house, the spare gas cylinders are connected with the second control valves, and the second control valves are connected with the control system;
the spare gas cylinder is used for storing low-temperature dry compressed air;
and the control system selectively sends a seventh instruction to the second control valve according to the response of the first control valve to the first instruction, the difference between the pressure difference of the internal pressure and the external pressure of the refrigeration house after the first control valve is opened in a set time length and the first balance value, so that the second control valve is opened, and the low-temperature dry compressed air in the standby air bottle is supplemented into the refrigeration house. Specifically, the following are the cases:
when the control system sends a first instruction to the first control valve and the first control valve does not respond, the control system sends a seventh instruction to the second control valve to open the second control valve and timely supplement the cold storage with low-temperature dry compressed air in the standby gas cylinder, the control system is used for calculating the pressure difference according to the current internal pressure and the external pressure of the cold storage, and when the pressure difference is not less than a first balance value, the control system generates an eighth instruction and sends the eighth instruction to the second control valve to close the second control valve.
When the first pressure sensor fails to monitor the pressure of the air storage tank, compressed air cannot be supplemented in the air storage tank in time, even if the first control valve is opened and dry compressed air is continuously supplemented, when the set time length is long, the control system still cannot achieve a first balance value according to the calculated pressure difference between the internal pressure and the external pressure detected by the differential pressure sensor, namely the pressure difference between the inside and the outside of the refrigeration house is still smaller than the first balance value, the control system sends a seventh instruction to the second control valve, opens the second control valve, and timely supplements the cold-dried compressed air in a standby air bottle to the interior of the refrigeration house, calculates the pressure difference according to the current internal pressure and the external pressure of the refrigeration house, and generates an eighth instruction and sends the eighth instruction to the second control valve when the pressure difference is not smaller than the first balance value, the second control valve is closed.
The standby gas cylinder is connected with a control system, a second pressure sensor is connected with the control system and used for monitoring the pressure of the standby gas cylinder and feeding the pressure back to the control system, and the control system receives the current pressure value of the standby gas cylinder; and when the current pressure value of the standby gas cylinder reaches a fourth set value, the control system generates a ninth instruction and sends the ninth instruction to the terminal display to prompt a user to replace the standby gas cylinder and ensure that the low-temperature dry compressed air in the standby gas cylinder is sufficiently filled for standby.
The air compressor is connected with the auxiliary air storage tank, the auxiliary air storage tank is connected with the second freezing type air dryer, the second freezing type air dryer is connected with the third control valve, the control system is connected with the third control valve, and the third control valve is connected with the refrigeration house; the control system calculates to obtain a pressure difference according to the current internal pressure and the external pressure of the refrigeration house, and when the pressure difference reaches a first set value, the control system generates a first instruction, sends the first instruction to the first control valve and opens the first control valve, generates a tenth instruction, sends the tenth instruction to the third control valve and opens the third control valve; when the pressure difference is not less than the first equilibrium value, the control system generates a second command and sends the second command to the first control valve to close the first control valve, and the control system generates an eleventh command and sends the eleventh command to the third control valve to close the third control valve.
Through above-mentioned technical scheme, when needs supply the inside low temperature drying's of freezer during compressed air, the low temperature drying air after first freezing formula air dryer and the drying of second freezing formula air dryer carries out and supplies inside the freezer simultaneously to promote the inside pressure of freezer rapidly and be greater than freezer external pressure or freezer inside and external pressure keep balance, the very big shortening reaches the inside pressure of freezer and is greater than freezer external pressure or the time that freezer inside and external pressure keep balance, avoid leading to the inside freezing or the frosting problem of possible freezer because of the compressed air replenishment time overlength of low temperature drying.
The control system is connected with the third pressure sensor, and the third pressure sensor is connected with the auxiliary air storage tank;
the third pressure sensor is used for monitoring the pressure of the auxiliary air storage tank and feeding the pressure back to the control system, and the control system receives the current pressure value of the auxiliary air storage tank;
when the current pressure value of the auxiliary air storage tank reaches a second set value, the control system generates a twelfth instruction and sends the twelfth instruction to the air compressor, the air compressor is opened, and compressed air is supplemented to the auxiliary air storage tank, namely the air compressor transmits the compressed air to the auxiliary air storage tank so as to supplement the compressed air in the auxiliary air storage tank;
and when the current pressure value of the auxiliary air storage tank reaches a third set value, the control system generates a thirteenth instruction and sends the thirteenth instruction to the air compressor to close the air compressor.
Above-mentioned technical scheme through the pressure in the third pressure sensor real-time supervision supplementary gas holder to ensure that the compressed air in the supplementary gas holder also can keep sufficient state constantly, when guaranteeing to carry cold air to the freezer inside, the compressed air in the supplementary gas holder can fully assist the supply cold air transportation demand.
In combination with the structural characteristics of the present invention, compared with the prior art, the anti-frosting system provided by the present invention comprises a control system, an air compressor, an air storage tank, a first freezing type air dryer, a first control valve, a differential pressure sensor and a refrigeration house, wherein the control system is connected with the air compressor, the air compressor is connected with the air storage tank, the air storage tank is connected with the first freezing type air dryer, the refrigeration house is connected with the differential pressure sensor, the differential pressure sensor is connected with the control system, the control system is connected with the first control valve, the first control valve is connected with the first freezing type air dryer, and the first control valve is connected with the refrigeration house. The compressed air after the air compressor is compressed is stored through the air storage tank, the air storage tank has a natural cooling process, and then the air storage tank is connected with the first freezing type air dryer to be connected for drying and refrigeration, so that the energy consumption is greatly reduced, and the economical efficiency is improved.
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 view of an anti-frosting system according to an embodiment of the present invention.
Fig. 2 is a schematic view of an anti-frosting system according to a second embodiment of the present invention.
Fig. 3 is a schematic view of a frost prevention system according to a third embodiment of the present invention.
Fig. 4 is a schematic view of an anti-frosting system according to a fifth embodiment of the present invention.
Fig. 5 is a schematic view of an anti-frosting system according to a sixth embodiment of the present invention.
Fig. 6 is a schematic view of a frost prevention system according to a seventh embodiment of the present invention.
Fig. 7 is a schematic view of an anti-frosting system according to an eighth embodiment of 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, an anti-frosting system includes a control system, an air compressor, an air storage tank, a first freezing type air dryer, a first control valve, a differential pressure sensor and a refrigeration house, wherein the control system is connected to the air compressor, the air compressor is connected to the air storage tank, the air storage tank is connected to the first freezing type air dryer, the refrigeration house is connected to the differential pressure sensor, the differential pressure sensor is connected to the control system, the control system is connected to the first control valve, the first control valve is connected to the first freezing type air dryer, and the first control valve is connected to the refrigeration house;
the air storage tank is used for storing compressed air compressed by the air compressor;
the first freezing type air dryer is used for cooling and drying the compressed air in the air storage tank, so that the compressed air entering the refrigeration house is ensured to be dried, and water vapor is prevented from being brought into the refrigeration house;
the differential pressure sensor is used for detecting the internal pressure of the refrigeration house and the external pressure of the refrigeration house;
the control system is used for calculating to obtain pressure difference according to the current internal pressure and the external pressure of the refrigeration house, and setting the current internal pressure of the refrigeration house to be P1Setting the current external pressure of the cold storage to be P2Setting the pressure difference to Δ P, wherein ΔP＝(P1-P2) (ii) a When the pressure difference Δ P reaches a first set value, it should be noted that the first set value is a preset value, and when the pressure difference between the inside and the outside of the freezer reaches the preset first set value, the control system generates a first command and sends the first command to the first control valve, so as to open the first control valve, and at this time, the low-temperature drying air passing through the first freezing type air dryer is supplemented to the inside of the freezer; when the pressure difference Δ P is not less than the first equilibrium value, the control system generates a second command and sends the second command to the first control valve to close the first control valve, it should be noted that the first equilibrium value is a preset value, the first equilibrium value may be 0 or greater than 0, when the first equilibrium value is 0, and when the pressure difference Δ P is not less than the first equilibrium value, in this condition state, the pressure difference Δ P inside and outside the refrigerator is 0 to maintain equilibrium or the internal pressure of the refrigerator is greater than the external pressure, when the first equilibrium value is greater than 0, and when the pressure difference Δ P is not less than the first equilibrium value, in this condition state, the pressure difference Δ P inside and outside the refrigerator is greater than 0, that is, the internal pressure of the refrigerator is greater than the external pressure,
the first control valve is used for receiving a first instruction and a second instruction sent by the control system; the first control valve is selectively opened according to the first command and the second command, and the low-temperature drying air passing through the first freezing type air dryer is transmitted to the inside of the refrigeration house, so that the pressure inside the refrigeration house is greater than the external pressure of the refrigeration house or the internal pressure and the external pressure of the refrigeration house are kept balanced, and the condition of heat exchange between the inside and the outside of the refrigeration house is damaged. The selectively opening of the first control valve means that when the first control valve receives a first command sent by the control system, the first control valve is opened, the low-temperature drying air passing through the first refrigeration type air dryer is delivered to the interior of the refrigerator, and when the first control valve receives a second command sent by the control system, the first control valve is closed.
The compressed air after the air compressor is compressed is stored through the air storage tank, the air storage tank has a natural cooling process, then the air storage tank is connected with the first freezing type air dryer for drying and refrigerating, the air storage tank is used for naturally cooling firstly, and then the air storage tank is used for drying and refrigerating, so that the energy consumption is greatly reduced, and the economical efficiency is improved.
Example two
As shown in fig. 2, at least one oil mist separator is further connected between the air compressor and the air storage tank, and is used for removing and purifying oil mist of the compressed air compressed by the air compressor and then entering the air storage tank for storage, and the collected oil mist is discharged as relatively clean compressed air to purify the compressed air.
As shown in fig. 2, at least one filtering device is further connected between the first control valve and the first refrigerated air dryer, the compressed air in the air storage tank is filtered by the filtering device to remove impurities in the compressed air and ensure that the compressed air entering the refrigerator is clean, and the filtering devices can be a plurality of groups and respectively filter particles with different sizes to obtain the required clean air. When the control system sends a first instruction to the first control valve, and the first control valve is opened, compressed air in the air storage tank is subjected to cooling and drying treatment by the first freezing type air dryer, and then is conveyed into the refrigeration house after impurities are filtered by the filtering device.
EXAMPLE III
As shown in fig. 3, the controller further comprises a first pressure sensor, the control system is connected with the first pressure sensor, and the first pressure sensor is connected with the air storage tank;
the first pressure sensor is used for monitoring the pressure of the gas storage tank and feeding the pressure back to the control system, and the control system receives the current pressure value of the gas storage tank;
when the current pressure value of the air storage tank reaches a second set value, the control system generates a third instruction and sends the third instruction to the air compressor, the air compressor is opened, and compressed air is supplemented to the air storage tank, namely the air compressor conveys compressed air to the air storage tank so as to supplement the compressed air in the air storage tank;
it should be noted that the second set value is a preset value, and when the current pressure value of the air storage tank reaches the second set value, which indicates that the compressed air in the air storage tank is insufficient at this time, and needs to be supplemented, the control system generates a third instruction and sends the third instruction to the air compressor, so as to turn on the air compressor and supplement the compressed air to the air storage tank.
And when the current pressure value of the air storage tank reaches a third set value, the control system generates a fourth instruction and sends the fourth instruction to the air compressor to close the air compressor.
It should be noted that the third set value is a preset value, and when the current pressure value of the air storage tank reaches the third set value, which indicates that the compressed air in the air storage tank is in a sufficient state at this time, the control system generates a fourth instruction and sends the fourth instruction to the air compressor, so as to close the air compressor, and stop supplying compressed air to the air storage tank.
According to the technical scheme, the pressure in the air storage tank is monitored in real time through the first pressure sensor, when the pressure in the air storage tank is monitored to be insufficient, the control system is fed back in time, the control system sends an instruction to the air compressor, the air compressor is opened, compressed air is supplemented to the air storage tank, so that the compressed air in the air storage tank can be kept in a sufficient state all the time, and when cold air is required to be conveyed to the inside of the refrigeration house, the compressed air in the air storage tank can fully supply cold air conveying requirements.
Example four
This embodiment is not shown in the figures. The refrigeration house comprises a refrigeration house body, wherein a cabin door and an access door are arranged on the refrigeration house body, the cabin door is used for the entry and exit of refrigerated articles, the access door is used for entering the interior of the refrigeration house through opening the access door when the refrigerated articles need to be manually entered into the refrigeration house for maintenance, a first sensing device is connected to the cabin door, a second sensing device is connected to the access door, and the first sensing device and the second sensing device are connected with a control system;
the first sensing device is used for sensing the opening and closing of the cabin door and feeding back signals of the opening and closing of the cabin door to the control system;
the second sensing device is used for sensing the opening and closing of the access door and feeding back the opening and closing signals of the access door to the control system;
the control system is used for receiving signals fed back by the first sensing device and the second sensing device, and selectively controls the first control valve to be opened and closed according to the received signals.
When the control system receives a hatch door or access door opening signal fed back by the first sensing device or the second sensing device, the control system generates a fifth instruction, sends the fifth instruction to the first control valve, opens the first control valve, and supplements the low-temperature drying air passing through the first freezing type air dryer to the interior of the refrigeration house; when the control system receives a signal fed back by the first sensing device or the second sensing device that the cabin door or the access door is closed and calculates that the obtained pressure difference is not less than a first balance value according to the current internal pressure and the current external pressure of the refrigeration house, the control system generates a sixth instruction and sends the sixth instruction to the first control valve to close the first control valve.
Open and the closed condition to hatch door and access door respectively through first induction system, second induction system and respond to, when first induction system, second induction system sense hatch door or access door are in the open condition, feed back the signal of the open condition of hatch door or access door to control system, the first control valve of control system control is opened, will pass through first freezing formula air dryer the low temperature drying air to the freezer conveying to make the inside pressure of freezer be greater than freezer external pressure or freezer inside and external pressure keep balance, the main technical problem who solves and the technological effect who realizes as follows:
the hatch door business turn over of cold-stored article through the freezer because freezer internal temperature is lower, and atmospheric pressure is lower than external environment, and when opening the hatch door, inside and outside pressure difference can lead to outside air admission cold in the freezer to lead to the moisture in the air to meet cold freezing in hatch door department, cause the hatch door to open and close and all receive the influence, can't normally open or seal and close the hatch door, influence the normal use of freezer, also influence the normal work of hatch door, still influence user experience.
For making things convenient for the inside maintenance and the maintenance of freezer, all can set up the access door on the freezer, when needs manual work gets into in the freezer and maintains, get into the freezer through opening the access door inside, when opening the access door, inside and outside pressure differential can lead to outside air to get into in the freezer to lead to outside air to meet the condensation knot in access door department, produce the phenomenon of freezing, long-time can lead to the access door to open the difficulty, influence the normal use of access door.
In the process of opening the cabin door and the access door, outside air enters the cold storage, water vapor is cooled and frozen to affect normal use of the cabin door and the access door, maintenance is inconvenient, cost is high, and user experience is poor.
Therefore, the technical proposal respectively senses the opening and closing states of the cabin door and the access door through the first sensing device and the second sensing device, when the first sensing device and the second sensing device sense that the cabin door or the access door is in the opening state, the signal of the opening state of the cabin door or the access door is fed back to the control system, the control system controls the first control valve to be opened, the low-temperature drying air passing through the first freezing type air dryer is transmitted to the refrigeration house, the compressed air after low-temperature drying is automatically supplemented into the refrigeration house, the pressure in the refrigeration house is increased to be larger than the external pressure of the refrigeration house or the internal and external pressures of the refrigeration house are kept balanced, the cold and heat exchange of the inside and the outside of the refrigeration house caused by the opening of a cabin door or an access door is prevented, the external hot air is prevented from entering the refrigeration house, thereby avoiding the phenomena of icing or frosting inside the cold storage, the cabin door, the access door and other connecting parts inside and outside the cold storage.
EXAMPLE five
As shown in fig. 4, in this embodiment, the refrigerator further includes a standby gas cylinder and a second control valve, the standby gas cylinder and the second control valve are disposed inside the refrigerator, the standby gas cylinder is connected to the second control valve, and the second control valve is connected to the control system; a plurality of spare gas cylinders and a plurality of second control valves can be arranged according to requirements and fall into the protection scope of the utility model;
the spare gas cylinder is used for storing low-temperature dry compressed air;
and the control system selectively sends a seventh instruction to the second control valve according to the response of the first control valve to the first instruction, the difference between the pressure difference of the internal pressure and the external pressure of the refrigeration house after the first control valve is opened in a set time length and the first balance value, so that the second control valve is opened, and the low-temperature dry compressed air in the standby air bottle is supplemented into the refrigeration house. Specifically, the following are the cases:
when the control system sends a first instruction to the first control valve and the first control valve does not respond, the control system sends a seventh instruction to the second control valve to open the second control valve and timely supplement the cold storage with low-temperature dry compressed air in the standby gas cylinder, the control system is used for calculating the pressure difference according to the current internal pressure and the external pressure of the cold storage, and when the pressure difference is not less than a first balance value, the control system generates an eighth instruction and sends the eighth instruction to the second control valve to close the second control valve.
When the first pressure sensor fails to monitor the pressure of the gas storage tank, compressed air cannot be supplemented in the gas storage tank in time, even if the first control valve is opened and continuously supplements the low-temperature dried compressed air to the interior of the refrigerator, when the set time length is reached, the control system calculates according to the internal pressure and the external pressure detected by the differential pressure sensor to obtain a pressure difference which still cannot reach a first balance value, namely, the internal and external pressure differences of the refrigerator are still smaller than the first balance value when the set time length is reached, the control system sends a seventh instruction to the second control valve to open the second control valve, the low-temperature dried compressed air in the standby gas cylinder is timely supplemented to the interior of the refrigerator, the control system calculates according to the current internal pressure and external pressure of the refrigerator to obtain a pressure difference, and when the pressure difference is not smaller than the first balance value, the control system generates an eighth instruction, and sending an eighth command to the second control valve to close the second control valve.
In the embodiment, the set time length is 20s, when the control system calculates that the pressure difference between the internal pressure and the external pressure of the refrigeration house after the first control valve is opened reaches a first set value according to the current internal pressure and the external pressure of the refrigeration house, the control system generates a first command and sends the first command to the first control valve to open the first control valve and continuously replenish the low-temperature drying air passing through the first refrigeration type air dryer into the refrigeration house, when the duration time reaches 20s, the control system calculates that the pressure difference between the inside and the outside of the refrigeration house is still smaller than a first balance value according to the internal pressure and the external pressure detected by the differential pressure sensor, and the pressure difference between the inside and the outside of the refrigeration house is the difference obtained by subtracting the external pressure from the internal pressure of the refrigeration house, the difference between the pressure inside and outside the freezer and the first balance value is the difference between the pressure inside and outside the freezer and the first balance value subtracted from the difference between the pressure inside and outside the freezer and the first balance value, and when the difference between the pressure inside and outside the freezer and the first balance value is less than 0 (according to the foregoing embodiment, the first balance value may be 0 or a value greater than 0), that is, the pressure inside and outside the freezer is less than the first balance value, for example, when the pressure monitoring of the first pressure sensor on the gas storage tank fails, the gas storage tank fails to supplement compressed air in time, that is, the compressed air in the gas storage tank is not sufficient, and the continuous transmission of 20s is insufficient to compensate the pressure difference between the inside and outside of the freezer, that is, after the continuous transmission of the low-temperature dry air 20s through the first freeze dryer, the pressure inside and outside the freezer still remains less than the first balance value, and in this case, the control system sends a seventh instruction to the second control valve, open the second control valve, utilize the low temperature drying's in the reserve gas cylinder compressed air in time to supply to the freezer inside to and in time promote the inside pressure of freezer to be greater than freezer external pressure or make the freezer inside and external pressure keeps balanced, thereby destroys the condition with the cold and hot exchange of freezer inside and outside, works as when the freezer inside and outside pressure differential reaches not less than first balanced value, also when the freezer inside and outside pressure differential is greater than or equal to first balanced value promptly, control system generates the eighth instruction, and to the second control valve sends the eighth instruction, closes the second control valve.
EXAMPLE six
As shown in fig. 5, in this embodiment, the gas cylinder pressure monitoring device further includes a terminal display, the terminal display is connected to the control system, the reserve gas cylinder is further connected to a second pressure sensor, the second pressure sensor is connected to the control system, the second pressure sensor is used for monitoring the pressure of the reserve gas cylinder and feeding the pressure back to the control system, and the control system receives the current pressure value of the reserve gas cylinder; and when the current pressure value of the standby gas cylinder reaches a fourth set value, the control system generates a ninth instruction and sends the ninth instruction to the terminal display to prompt a user to replace the standby gas cylinder and ensure that the low-temperature dry compressed air in the standby gas cylinder is sufficiently filled for standby.
It should be noted that the fourth set value is a preset value, and when the second pressure sensor is used for monitoring that the pressure value of the backup gas cylinder reaches the fourth set value, it indicates that the amount of the low-temperature dried compressed air in the backup gas cylinder is insufficient, and the gas cylinder needs to be replaced.
EXAMPLE seven
As shown in fig. 6, in this embodiment, the refrigeration system further includes an auxiliary air tank, a second refrigeration type air dryer, and a third control valve, wherein the air compressor is connected to the auxiliary air tank, the auxiliary air tank is connected to the second refrigeration type air dryer, the second refrigeration type air dryer is connected to the third control valve, the control system is connected to the third control valve, and the third control valve is connected to the refrigerator;
the control system calculates to obtain a pressure difference according to the current internal pressure and the external pressure of the refrigeration house, and when the pressure difference reaches a first set value, the control system generates a first instruction, sends the first instruction to the first control valve and opens the first control valve, generates a tenth instruction, sends the tenth instruction to the third control valve and opens the third control valve;
through the technical scheme, when low-temperature drying compressed air needs to be supplemented into the refrigeration house, the low-temperature drying compressed air dried by the first freezing type air dryer and the second freezing type air dryer is supplemented into the refrigeration house at the same time, the two simultaneous air inlets are supplemented to rapidly promote the pressure inside the refrigeration house to be greater than the external pressure of the refrigeration house or the internal and external pressures of the refrigeration house to keep a balanced state, the time for reaching the pressure inside the refrigeration house to be greater than the external pressure of the refrigeration house or the internal and external pressures of the refrigeration house to be balanced is greatly shortened, the possible problem of icing or frosting inside the refrigeration house caused by overlong transmission time of the low-temperature drying compressed air is avoided, the method is changed, namely, the control system calculates the pressure difference according to the current internal pressure and external pressure of the refrigeration house, when the pressure difference reaches a first set value, the technical scheme includes that compressed air for low-temperature drying is supplemented into a refrigeration house by a freezing type air dryer, so that the pressure in the refrigeration house is greater than the external pressure of the refrigeration house or the internal and external pressures of the refrigeration house are kept balanced, the compressed air for low-temperature drying is supplemented into the refrigeration house by the freezing type air dryer, the pressure in the refrigeration house is greater than the external pressure of the refrigeration house or the internal and external pressures of the refrigeration house are kept balanced, a certain time is needed, before the state is not reached, the pressure in the refrigeration house is still less than the external pressure of the refrigeration house, therefore, before the state is not reached, the problem that the internal of the refrigeration house is frozen or frosted due to the fact that hot air outside the refrigeration house enters the refrigeration house still exists, and therefore, in the technical scheme, through an auxiliary air storage tank, a second freezing type air dryer and a third control valve, the low-temperature drying compressed air after the first freezing type air dryer and the second freezing type air dryer are dried is supplemented into the refrigeration house at the same time, the two air inlets are supplemented simultaneously, the double pipes are arranged simultaneously, the pressure inside the refrigeration house is rapidly promoted to be greater than the external pressure of the refrigeration house or the internal pressure and the external pressure of the refrigeration house are kept in a balanced state, the time for greatly shortening the time for reaching the internal pressure of the refrigeration house to be greater than the external pressure of the refrigeration house or the internal pressure and the external pressure of the refrigeration house to be balanced is greatly shortened, and the possibility of icing or frosting inside the refrigeration house is greatly reduced.
When the pressure difference is not less than the first equilibrium value, the control system generates a second command and sends the second command to the first control valve to close the first control valve, and the control system generates an eleventh command and sends the eleventh command to the third control valve to close the third control valve.
Example eight
As shown in fig. 7, in this embodiment, a third pressure sensor is further included, the control system is connected with the third pressure sensor, and the third pressure sensor is connected with the auxiliary air tank;
the third pressure sensor is used for monitoring the pressure of the auxiliary air storage tank and feeding the pressure back to the control system, and the control system receives the current pressure value of the auxiliary air storage tank;
when the current pressure value of the auxiliary air storage tank reaches a second set value, the control system generates a twelfth instruction and sends the twelfth instruction to the air compressor, the air compressor is opened, and compressed air is supplemented to the auxiliary air storage tank, namely the air compressor transmits the compressed air to the auxiliary air storage tank so as to supplement the compressed air in the auxiliary air storage tank;
and when the current pressure value of the auxiliary air storage tank reaches a third set value, the control system generates a thirteenth instruction and sends the thirteenth instruction to the air compressor to close the air compressor.
It should be noted that, in order to simplify the logic control of the control system, the second set value and the third set value described in this embodiment are the same as the second set value and the third set value described in the third embodiment.
In the technical scheme, the pressure in the auxiliary air storage tank is monitored in real time through the third pressure sensor, so that the compressed air in the auxiliary air storage tank can be kept in a sufficient state all the time, and when the cold air needs to be conveyed to the inside of the refrigeration house, the compressed air in the auxiliary air storage tank can fully assist in supplying the cold air conveying requirement.
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. An anti-frosting system, characterized in that: the control system is connected with the air compressor, the air compressor is connected with the air storage tank, the air storage tank is connected with the first freezing type air dryer, the refrigeration house is connected with the differential pressure sensor, the differential pressure sensor is connected with the control system, the control system is connected with the first control valve, the first control valve is connected with the first freezing type air dryer, and the first control valve is connected with the refrigeration house;
the air storage tank is used for storing compressed air compressed by the air compressor;
the first freezing type air dryer is used for cooling and drying the compressed air in the air storage tank;
the differential pressure sensor is used for detecting the internal pressure of the refrigeration house and the external pressure of the refrigeration house;
the control system is used for calculating to obtain a 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 control system generates a first instruction and sends the first instruction to the first control valve to open the first control valve; when the pressure difference is not less than the first balance value, the control system generates a second command and sends the second command to the first control valve to close the first control valve;
the first control valve is used for receiving a first instruction and a second instruction sent by the control system; the first control valve is selectively opened based on the first and second commands.
2. The anti-frosting system according to claim 1, wherein: at least one oil mist separator is connected between the air compressor and the air storage tank.
3. The anti-frosting system according to claim 2, wherein: at least one filter device is also connected between the first control valve and the first refrigerated air dryer.
4. An anti-frosting system according to any of claims 1 to 3, characterized in that: the control system is connected with the first pressure sensor, and the first pressure sensor is connected with the air storage tank;
the first pressure sensor is used for monitoring the pressure of the gas storage tank and feeding the pressure back to the control system, and the control system receives the current pressure value of the gas storage tank;
when the current pressure value of the air storage tank reaches a second set value, the control system generates a third instruction and sends the third instruction to the air compressor to open the air compressor;
and when the current pressure value of the air storage tank reaches a third set value, the control system generates a fourth instruction and sends the fourth instruction to the air compressor to close the air compressor.
5. The anti-frosting system according to claim 1, wherein: the refrigeration house comprises a house body, wherein a cabin door and an access door are arranged on the house body, a first sensing device is connected to the cabin door, a second sensing device is connected to the access door, and the first sensing device and the second sensing device are connected with a control system;
the first sensing device is used for sensing the opening and closing of the cabin door and feeding back signals of the opening and closing of the cabin door to the control system;
the second sensing device is used for sensing the opening and closing of the access door and feeding back the opening and closing signals of the access door to the control system;
the control system is used for receiving signals fed back by the first sensing device and the second sensing device, and selectively controls the first control valve to be opened and closed according to the received signals.
6. The anti-frosting system according to claim 5, wherein: when the control system receives a hatch door or access door opening signal fed back by the first sensing device or the second sensing device, the control system generates a fifth instruction, sends the fifth instruction to the first control valve and opens the first control valve; when the control system receives a closing signal of the cabin door or the access door fed back by the first sensing device or the second sensing device and calculates that the pressure difference is not less than a first balance value according to the current internal pressure and the current external pressure of the refrigeration house, the control system generates a sixth instruction and sends the sixth instruction to the first control valve to close the first control valve.
7. The anti-frosting system according to claim 4, wherein: the refrigeration storage system is characterized by further comprising at least one spare gas cylinder and second control valves matched with the spare gas cylinders in number, wherein the spare gas cylinders and the second control valves are arranged in the refrigeration storage, the spare gas cylinders are connected with the second control valves, and the second control valves are connected with the control system;
the spare gas cylinder is used for storing low-temperature dry compressed air;
and the control system selectively sends a seventh instruction to the second control valve according to the response of the first control valve to the first instruction, the difference between the pressure difference of the internal pressure and the external pressure of the refrigeration house after the first control valve is opened and the set time length and the first balance value, and opens the second control valve.
8. The anti-frosting system according to claim 7, wherein: the standby gas cylinder is connected with the second pressure sensor, and the second pressure sensor is connected with the control system;
the second pressure sensor is used for monitoring the pressure of the standby gas cylinder and feeding the pressure back to the control system;
the control system receives the current pressure value of the standby gas cylinder; and when the current pressure value of the standby gas cylinder reaches a fourth set value, the control system generates a ninth instruction and sends the ninth instruction to the terminal display to prompt a user to replace the standby gas cylinder.
9. The anti-frosting system according to claim 4, wherein: the air compressor is connected with the auxiliary air storage tank, the auxiliary air storage tank is connected with the second freezing type air dryer, the second freezing type air dryer is connected with the third control valve, the control system is connected with the third control valve, and the third control valve is connected with the refrigeration house;
the control system calculates to obtain a 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 control system generates a tenth command and sends the tenth command to the third control valve to open the third control valve; when the pressure difference is not less than the first equilibrium value, the control system generates an eleventh command and sends the eleventh command to the third control valve, closing the third control valve.
10. The anti-frosting system according to claim 9, wherein: the control system is connected with the third pressure sensor, and the third pressure sensor is connected with the auxiliary air storage tank;
the third pressure sensor is used for monitoring the pressure of the auxiliary air storage tank and feeding the pressure back to the control system;
the control system receives the current pressure value of the auxiliary air storage tank; when the current pressure value of the auxiliary air storage tank reaches a second set value, the control system generates a twelfth instruction, sends the twelfth instruction to the air compressor and turns on the air compressor; and when the current pressure value of the auxiliary air storage tank reaches a third set value, the control system generates a thirteenth instruction and sends the thirteenth instruction to the air compressor to close the air compressor.
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| CN113883808A (en) * | 2021-10-28 | 2022-01-04 | 深圳市爱康生物科技有限公司 | Anti-frosting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113883808A (en) * | 2021-10-28 | 2022-01-04 | 深圳市爱康生物科技有限公司 | Anti-frosting system |
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