CN218853899U - Low-power-consumption low-temperature molecular sieve cylinder - Google Patents

Abstract

The application relates to a low-power-consumption low-temperature molecular sieve cylinder, which relates to the technical field of oxygen generators and comprises a cylinder body, wherein a plurality of heating elements are arranged on the outer side of the cylinder body, and the plurality of heating elements are arranged in parallel; the heating element signal is connected to the controller, and the controller is used for starting the heating element to heat; when the ambient temperature is within the set temperature range, the controller sequentially activates the plurality of heating elements. This application has the instantaneous power that reduces a molecular sieve section of thick bamboo and start to effectively improve a molecular sieve section of thick bamboo's security, and increase of service life's effect.

Description

Low-power-consumption low-temperature molecular sieve cylinder

Technical Field

The application relates to the technical field of oxygen generators, in particular to a low-power-consumption low-temperature molecular sieve cylinder.

Background

In a plateau low-temperature environment, due to elevation, the atmospheric pressure is reduced, so that the air is rarefied, the oxygen content in the air is reduced, and people who are not suitable for low oxygen content need an oxygen generator to meet the requirement on the oxygen content.

The oxygen generator is a machine for preparing oxygen and adopts the principle of utilizing air separation technology. One of the ways is to produce oxygen in the presence of air by using pressure swing adsorption separation technology through molecular sieves placed in a molecular sieve cylinder. When oxygen needs to be prepared, the controller starts the heating film on the surface of the molecular sieve cylinder to realize oxygen-nitrogen separation, and because the instantaneous current for starting the heating film is larger, the safety of the molecular sieve cylinder is easy to reduce, and the generated loss is easy to be larger.

SUMMERY OF THE UTILITY MODEL

In order to improve the security of a molecular sieve section of thick bamboo and reduce the loss, this application provides a low-power consumption low temperature molecular sieve section of thick bamboo.

The application provides a low-power consumption low temperature molecular sieve section of thick bamboo adopts following technical scheme:

a low-power-consumption low-temperature molecular sieve cylinder comprises a cylinder body, wherein heating elements are arranged on the outer side of the cylinder body, a plurality of heating elements are arranged, and the heating elements are arranged in parallel;

the heating element is connected with a controller in a signal mode, and the controller is used for starting the heating element to heat; when the ambient temperature is within the set temperature range, the controller sequentially starts the plurality of heating elements.

Through adopting above-mentioned technical scheme, because the service environment temperature of oxygenerator is lower, consequently, the heating member of different quantity is started through the controller in the temperature range who sets for, and when starting a plurality of heating members, adopts the mode of starting a plurality of heating members in proper order for start interval period between two adjacent heating members, when can effectively reducing directly start a molecular sieve section of thick bamboo, the instantaneous current that the heating member produced realizes effectively improving the security of a molecular sieve section of thick bamboo, and increase of service life's purpose.

Preferably, the set temperature range is detected by a temperature measuring part, the temperature measuring part is in signal connection with a judging unit, and the output end of the judging unit is provided with a first temperature switch S1 and a second temperature switch S2;

the first temperature switch S1 corresponds to a first temperature range, and the first temperature switch S1 is in signal connection with one of the heating elements;

the second temperature switch S2 corresponds to a second temperature range, the second temperature switch S2 is in signal connection with the plurality of heating parts, and the plurality of heating parts are controlled by the controller to be sequentially started;

wherein the temperature of the first temperature range is higher than the second temperature range.

By adopting the technical scheme, the temperature measuring part detects the ambient temperature, and then the judgment is carried out by the judgment unit to judge whether the current temperature is in the first temperature range or the second temperature range; one of the heating members is activated by closing the first temperature switch S1 if in the first temperature range, and the plurality of heating members are sequentially activated by closing the second temperature switch S2 if in the second temperature range.

Preferably, the judging unit includes a first comparator U1 and a second comparator U2,

two input ends of the first comparator U1 are respectively in signal connection with the temperature measuring part and a first temperature range threshold Vref1, and the output end of the first comparator U1 is sequentially in signal connection with the controller and the first temperature switch S1; when the temperature measuring signal output by the temperature measuring part is in the first temperature range, the controller outputs a first switch signal to the first temperature switch S1, so that the first temperature switch S1 is closed, and at the moment, one of the heating parts starts to heat;

two input ends of the second comparator U2 are respectively in signal connection with the temperature measuring part and a threshold Vref2 of a second temperature range, and an output end of the second comparator U2 is sequentially in signal connection with the controller and the second temperature switch S2; when the temperature measurement signal output by the temperature measurement part is within the second temperature range, the controller outputs a second switch signal to the second temperature switch S2, so that the second temperature switch S2 is closed, and at the moment, the other heating parts start to heat in sequence, wherein the other heating parts are all the heating parts except one of the heating parts.

By adopting the technical scheme, when the temperature signal output by the temperature measuring part is smaller than the first temperature range threshold Vref1, after the comparison of the first comparator U1, the controller receives a high level signal, and then the controller starts the first temperature switch S1, so that one heating part starts to heat; when the temperature signal output by the temperature measuring part is smaller than a second temperature range threshold Vref2, after the comparison of the second comparator U2, the controller receives a high level signal, and then the second temperature switch S2 is turned on by the controller, so that the heating parts except one of the heating parts are sequentially heated.

The temperature of the first temperature range is higher than that of the second temperature range, so that the threshold value Vref1 of the first temperature range is larger than the threshold value Vref2 of the second temperature range, when the temperature change is changed from a higher temperature to a lower temperature, when the temperature signal output by the temperature measuring part is smaller than the threshold value Vref2 of the second temperature range, the temperature signal is obviously smaller than the threshold value Vref1 of the first temperature range, at this time, one of the heating parts is in a heating state, and after the controller controls the other heating parts to be sequentially heated through the closing of the second temperature switch S2, all the heating parts can be turned on to be heated, so that the purpose of sequentially turning on the plurality of heating parts in the second temperature range is achieved.

Preferably, the judging unit includes a first comparator U1 and a second comparator U2,

two input ends of a second comparator U1 are respectively in signal connection with the temperature measuring part and a threshold Vref1 of a second temperature range, and an output end of the second comparator U2 is sequentially in signal connection with the controller and the second temperature switch S2; when the temperature measuring signal output by the temperature measuring part is in the second temperature range, the controller outputs a second switch signal to the second temperature switch S2, so that the second temperature switch S2 is closed, and the heating parts start to heat in sequence; wherein the plurality of heating members includes the one of the heating members and the other of the heating members;

the output end of the second comparator U2 is in signal connection with a phase inverter N, the output end of the phase inverter N is in signal connection with the controller, the controller is in signal connection with a coil of a relay K, two switch ends of the relay K are respectively in signal connection with the temperature measuring part and one input end of the first comparator U1, and the other input end of the first comparator U1 inputs a first temperature range threshold Vref1;

the output end of the first comparator U1 is sequentially in signal connection with the controller and the first temperature switch S1, when the temperature measuring signal output by the temperature measuring part is in the first temperature range, the controller outputs a first switch signal to the first temperature switch S1, so that the first temperature switch S1 is closed, and at the moment, one of the heating parts starts to heat.

By adopting the technical scheme, when the temperature signal output by the temperature measuring part is smaller than a first temperature range threshold Vref1 and larger than a second temperature range threshold Vref2, the temperature signal is compared by a second comparator U2, then the second comparator U2 outputs a low level signal, at the moment, the temperature signal is inverted by an inverter N and then a high level signal is output, a relay K is started through a controller, so that the temperature signal output by the temperature measuring part is input into the first comparator U1, the first comparator U1 outputs a high level signal, the controller receives the high level signal, and then the first temperature switch S1 is started through the controller, so that one heating element starts to heat; when the temperature signal output by the temperature measuring part is smaller than the second temperature range threshold value Vref2, after the comparison of the second comparator U2, the controller receives a high level signal, and the second temperature switch S2 is opened through the controller, so that the plurality of heating parts start to heat in sequence.

Preferably, a time delay device is arranged between each other heating element and the second temperature switch S2, and the time delay time of each time delay device is different;

each time delay device and the corresponding heating element form a branch, and a plurality of branches are connected in parallel.

Through adopting above-mentioned technical scheme, realize the purpose that sets up other heating members start-up time delay, and then guarantee that the instantaneous current that produces when the heating member starts is lower, improves the security.

Preferably, the temperature measuring part comprises a first environment temperature measuring probe and a second environment temperature measuring probe, the first environment temperature measuring probe is arranged on the inner side of the cylinder body, and the second environment temperature measuring probe is arranged on the outer side of the cylinder body;

when the change rate of the environmental temperature is lower than a set rate, the temperature detected by the first environmental temperature measuring probe is used as a judgment basis, and when the change rate of the environmental temperature is higher than the set rate, the temperature detected by the second environmental temperature measuring probe is used as a judgment basis; the judgment basis refers to data input by the input end of the judgment unit.

By adopting the technical scheme, when a user rapidly moves the molecular sieve cylinder from one place to another place and the temperature difference between the two places is large, the temperature in the molecular sieve cylinder cannot be rapidly changed to the external environment temperature, and the oxygen generator works at the moment and needs to judge according to the external environment temperature; and the judgment is more accurate according to the temperature in the molecular sieve cylinder at other times.

Preferably, the second environment temperature measuring probe is in signal connection with a temperature change rate unit, and the second environment temperature measuring probe and the temperature change rate unit are in signal connection with the controller;

the controller receives and forwards a second temperature signal output by the second environment temperature measuring probe, and simultaneously sends a time signal when the controller forwards the second temperature signal to the temperature change rate unit;

and after receiving the second temperature signal and the time signal, the temperature change rate unit calculates the temperature change rate according to a set formula and outputs the temperature change rate to the controller, and the controller determines whether to judge according to the second temperature signal according to the temperature change rate.

By adopting the technical scheme, the change rate of the temperature detected by the second environment temperature probe is obtained through calculation and is output to the controller, and the controller determines whether the temperature detected by the second environment temperature probe is adopted as a judgment basis according to the change rate of the temperature.

Preferably, the heating element comprises a heating wire and a heat conducting film, the heat conducting film is laid on the outer side wall of the barrel, and the heating wire is arranged on one side of the heat conducting film, which is far away from the barrel;

the heating wire is in signal connection with the controller, the controller enables the heating wire to be electrified, and the heating wire starts to heat after being electrified.

Through adopting above-mentioned technical scheme, through the heater strip heat that produces behind getting electricity, can make a molecular sieve section of thick bamboo begin work, and through the heat conduction membrane, be convenient for transmit the heat that the heater strip produced to a molecular sieve section of thick bamboo.

Preferably, one side of the heating wire, which is far away from the heat conducting film, is provided with a heat insulation film, and the heat insulation film covers the barrel.

Through adopting above-mentioned technical scheme, through the setting of thermal-insulated membrane, reduce the heat that the heater strip produced and give off the probability of other positions, the heat transfer that the heater strip of further being convenient for got the electricity production extremely in the barrel.

Preferably, the heating zone generated by the heating element covers the molecular sieve cylinder.

By adopting the technical scheme, the molecular sieve cylinder can be heated more quickly, meanwhile, a certain area is not easy to be excessively heated, and the heating process of the molecular sieve cylinder is better.

In summary, the present application includes at least one of the following beneficial technical effects:

1. because the temperature of the use environment of the oxygen generator is low, heating elements with different numbers are started through the controller within a set temperature range, and when the plurality of heating elements are started, a mode of sequentially starting the plurality of heating elements is adopted, so that the starting interval between two adjacent heating elements is kept for a period of time, instantaneous current generated by the heating elements when the molecular sieve cylinder is directly started can be effectively reduced, the safety of the molecular sieve cylinder is effectively improved, and the service life of the molecular sieve cylinder is prolonged;

2. when the temperature signal output by the temperature measuring part is smaller than a first temperature range threshold Vref1, after the comparison of a first comparator U1, the controller receives a high level signal, and then a first temperature switch S1 is opened through the controller, so that one heating part starts to heat; when the temperature signal output by the temperature measuring part is smaller than a second temperature range threshold Vref2, after the comparison of a second comparator U2, the controller receives a high level signal, and then a second temperature switch S2 is opened through the controller, so that the heating parts except one of the heating parts are sequentially heated;

or when the temperature signal output by the temperature measuring part is smaller than the first temperature range threshold value Vref1 and larger than the second temperature range threshold value Vref2, the temperature signal is compared by the second comparator U2, the second comparator U2 outputs a low level signal, the phase of the temperature signal is inverted by the inverter N, a high level signal is output, the relay K is started by the controller, the temperature signal output by the temperature measuring part is input into the first comparator U1, the first comparator U1 outputs a high level signal, the controller receives the high level signal, and then the first temperature switch S1 is started by the controller, so that one heating part starts to be heated; when the temperature signal output by the temperature measuring part is smaller than a second temperature range threshold value Vref2, after the comparison of a second comparator U2, the controller receives a high level signal, and the controller starts a second temperature switch S2, so that the heating parts start to heat in sequence;

3. when a user moves the molecular sieve cylinder from one place to another place quickly and the temperature difference between the two places is large, the temperature in the molecular sieve cylinder cannot change to the external environment temperature quickly, and the oxygen generator works at the moment and needs to judge according to the external environment temperature; and the judgment is more accurate according to the temperature in the molecular sieve cylinder at other times.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic view of the heating wire according to the embodiment of the present application;

FIG. 3 is a circuit diagram of an embodiment of the present application with respect to a rate of temperature change cell;

FIG. 4 is a circuit diagram of a judging unit in the first implementation way according to an embodiment of the present application;

fig. 5 is a circuit diagram of a judging unit in the second implementation manner according to an embodiment of the present application.

Reference numerals are as follows: 1. a controller; 11. a selector switch; 12. a time delay; 2. a barrel; 21. a through hole; 3. a heating member; 31. a heating wire; 311. a first heating wire; 312. a second heating wire; 313. a third heating wire; 314. a fourth heating wire; 32. a thermally conductive film; 33. a heat insulating film; 4. a temperature measuring part; 41. a first environmental temperature probe; 42. a second environment temperature probe; 5. a temperature change rate unit; 6. and a judging unit.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

In actual use, the user usually uses the oxygen generator in an environment below 0 ℃, and stops using the oxygen generator in an environment below minus 41 ℃ or minus 43 ℃. Under the premise, when the application considers the safety of the molecular sieve cylinder, the temperature of minus 15 ℃ is taken as a critical value, so that the temperature of 0 ℃ to minus 15 ℃ is taken as a first temperature range, and the temperature of minus 15 ℃ to minus 41 ℃ or minus 43 ℃ is taken as a second temperature range. Other temperatures may of course be selected as the threshold. Reference in the present application to low temperatures is also to the two temperature ranges mentioned above.

The selection of a critical value of-15 c is contemplated herein in view of the fact that in a first temperature range, a lower temperature may be used as the molecular sieve heating temperature, and in a second temperature range, a higher temperature may be required as the molecular sieve heating temperature. The personnel in the field can also change the critical value of minus 15 ℃ to other temperature values according to the use requirement of the personnel in the field so as to meet the use requirement.

It should be noted that in the present embodiment, in the state of the first temperature range and the second temperature range, the temperature is above 0 ℃ and below-41 ℃ or below-43 ℃, and the molecular sieve cartridge proposed in the present embodiment does not operate, i.e. the above temperature ranges are not considered as the range of the present embodiment.

In addition, in this embodiment of the present application, the controller 1 may be provided with a PLC or an MCU, etc., and needs to be connected to a power supply, and the functions in this embodiment of the present application are mainly for converting the types of signals, forwarding the signals, delaying the functions, and basic functions such as a basic operation function.

The embodiment of the application discloses a low-power-consumption low-temperature molecular sieve cylinder which is mainly applied to an oxygen generator.

Referring to fig. 1, a low-power consumption low-temperature molecular sieve tube includes a tube body 2, the tube body 2 is set to be approximately cylindrical, and the sidewall of the tube body 2 is provided with a plurality of through holes 21, the plurality of through holes 21 are distributed in an array, or two adjacent rows are staggered, and the arrangement in fig. 1 is array distribution.

Referring to fig. 1 and 2, a heating member 3 is disposed outside the drum 2, and in order to realize heating at a first temperature range using only a low temperature, in the embodiment of the present invention, the heating member 3 is disposed in plurality, and the plurality of heating members 3 are disposed in parallel.

The parallel arrangement can be understood in two ways, on one hand, in the circuit structure, the plurality of heating elements 3 are connected in parallel to realize circuit connection; on the other hand, the plurality of heating elements 3 are also physically connected in parallel, or in parallel.

The parallel mode can be that each heating element 3 is arranged in a ring shape and is sleeved on the outer side of the cylinder body 2 in sequence; or the cross section of the cylinder body is arc-shaped and long, the cylinder body and the cylinder body are combined into a cylinder shape in parallel and arranged at the outer side of the cylinder body 2. In the embodiment of the present application, the heating wire 31 adopts the heating wire 31 to heat, and the heating wire 31 is provided with four, and all sets up to cyclic annular, and four annular heating wires 31 set up in parallel in the outside of barrel 2, and set up to first heating wire 311, second heating wire 312, third heating wire 313 and fourth heating wire 314 respectively from the one end of barrel 2.

Further, referring to fig. 1 and 2, in an embodiment, the heating member 3 further includes a thermal conductive film 32, and the thermal conductive film 32 may be a film with a higher thermal conductivity, such as a graphene thermal conductive film 32. In the embodiment of the present application, the heat conduction film 32 is laid on the outer side wall of the cylinder 2, and the heat conduction film 32 completely covers the cylinder 2, so as to better transmit the temperature generated by the heating wire 31 into the cylinder 2. It is to be understood that the heating wire 31 herein may be any one of the first heating wire 311, the second heating wire 312, the third heating wire 313 and the fourth heating wire 314.

The heater strip 31 sets up the one side of keeping away from a molecular sieve section of thick bamboo at heat-conducting membrane 32, in this application embodiment, can set up to the pattern of arranging for approximate snakelike, and heater strip 31 can adopt fixed connection's such as cementing mode fixed connection in heat-conducting membrane 32 simultaneously. Wherein the heating wire 31 may be configured as an iron-chromium-aluminum heating wire or a nickel-chromium heating wire or a resistance wire, etc.

The area that can be covered by the heat generated by the heater wire 31 is a heating area in order to completely cover the side of the drum 2. Since the area farther away from the heating wire 31 generates less heat, the heating requirement can be satisfied by overlapping the farther areas of two adjacent heating wires 31.

In this application embodiment, heater strip 31 and controller 1 signal connection, controller 1 makes heater strip 31 get electric, can produce the heat after heater strip 31 gets electric, in heat conduction membrane 32 with heat transfer to barrel 2 to realize the purpose of heating.

In another embodiment, a heat insulation film 33 may be further disposed on a side of the heating wire 31 away from the heat conduction film 32, the heat insulation film 33 covers the barrel 2, and at this time, the heat insulation film 33 also covers the heating wire 31 and the heating area, so that the probability that the temperature generated by the heating wire 31 is emitted toward the outside of the barrel 2 can be effectively reduced.

In the embodiment of the present application, the heat insulation film 33 may be made of PET as a substrate, or made of foam, fiber material, gold, silver, nickel, aluminum foil, or metal-plated polyester, polyimide film, or the like. The heat insulation film 33 and the heat conduction film 32 are fixedly connected by gluing or vacuum edge compaction. It should be noted that the heat conductive film 32 and the heat insulating film 33 are not fixed in position in fig. 1 for better illustrating the positions thereof.

Furthermore, each heating wire 31 is in signal connection with the controller 1, and after the controller 1 outputs a signal to the corresponding heating wire 31, the corresponding heating wire 31 can be started to heat.

When the ambient temperature is in the first temperature range, the controller 1 can start heating the first heating wire 311, and in practical applications, the second heating wire 312, the third heating wire 313 or the fourth heating wire 314 can also start heating.

When the ambient temperature is in the second temperature range, the controller 1 sequentially activates the second heating wire 312, the third heating wire 313 and the fourth heating wire 314 while keeping the first heating wire 311 normally heated, which is also for convenience of description herein, and in practical applications, the sequential heating order may be replaced.

Through the mode of starting heater strip 31 in proper order, instantaneous current when heater strip 31 opens can be effectively controlled to control instantaneous power, and then realize improving the mesh of a molecular sieve section of thick bamboo security, also can prolong the life of a molecular sieve section of thick bamboo simultaneously.

In order to realize the above functions, the embodiment of the present application further provides a circuit configuration used in conjunction with the controller 1, and the following detailed description is provided.

Referring to fig. 3 and 4, the ambient temperature is detected by the temperature measuring member 4, in the embodiment of the present application, the temperature measuring member 4 is configured as a temperature measuring probe, and a PTC temperature sensor with a positive temperature coefficient can be used.

In order to determine the ambient temperature more accurately, the embodiment of the present application is provided with 2 temperature sensors, which are a first ambient temperature measuring probe 41 and a second ambient temperature measuring probe 42 respectively. Wherein, the first environment temperature probe 41 is arranged at the inner side of the cylinder body 2 and is used for detecting the temperature in the cylinder body 2, and the second environment temperature probe 42 is arranged at the outer side of the cylinder body 2 and is used for detecting the temperature of the environment where the oxygen generator is positioned. Wherein, the signal output by the first environment temperature measuring probe 41 is a first temperature signal, and the signal output by the second environment temperature measuring probe is a second temperature signal.

When the change rate of the environmental temperature is lower than the set rate, the temperature detected by the first environmental temperature measuring probe is used as the judgment basis, and the temperature in the cylinder body 2 is used as the basis, so that the method is more accurate.

When the ambient temperature change rate is higher than the set rate, the temperature detected by the second ambient temperature probe 42 is used as the judgment basis, at the moment, because the temperature of the external environment changes too fast, the temperature in the barrel 2 is not easy to change rapidly, and the temperature of the external environment is used as the judgment, so that the judgment is more accurate.

The above judgment criterion may be understood as a criterion for judging the temperature range. The above temperature changes rapidly can be understood as that, in the environment of the first temperature range, the temperature of the cylinder 2 is not easily changed from the first temperature range to the second temperature range when the cylinder is rapidly moved to the range of the second temperature environment, so that the second environment temperature measuring probe 42 can also be arranged at a position, such as the outer side of the oxygen generator, where the external environment temperature changes are convenient to obtain.

Referring to fig. 3, in order to determine the temperature change rate of the external environment, the embodiment of the present application is provided with a temperature change rate unit 5 and a rate comparator U0, which are described in detail below.

The output end of the second environment temperature measuring probe is connected with the input end of the temperature change rate unit 5 through signals, and the second environment temperature measuring probe 42 and the temperature change rate unit 5 are connected with the controller 1 through signals. The controller 1 can receive the second temperature signal and control whether the second temperature signal is input into the judging unit 6 according to the output signal of the temperature change rate unit 5; the determining unit 6 is used for determining whether the first temperature signal or the second temperature signal is in a first temperature range or a second temperature range, which will be described in detail below.

When the controller 1 forwards the second temperature signal to the temperature change rate unit 5, it sends a time signal to the temperature change rate unit 5, where the time signal can be understood as the time when the second temperature signal is output and converted into a numerical value signal by a signal conversion function carried by the controller 1, and the time signal can be output by a timing function carried by the controller 1. To facilitate the calculation by the temperature rate of change unit 5, the second temperature signal is also converted into a numerical signal by the controller 1.

After receiving the second temperature signal and the time signal, the temperature change rate unit 5 respectively makes a difference between the second temperature signal and the time signal and a corresponding signal received last time, and then calculates the temperature change rate according to a set formula by using the two differences and outputs the temperature change rate to the controller 1. The temperature change rate unit 5 is further provided with a memory having a storage function for temporarily storing the second temperature signal, the time signal, the difference between two adjacent second temperature signals, and the difference between two adjacent time signals.

Wherein the set formula is: rate of temperature change = second temperature signal difference/time signal difference. The second temperature signal difference is the difference between the second temperature signals output by two adjacent times, and the unit is; the time signal difference is the difference between the two adjacent output time signals, and the unit is h, min or s, namely, hour, minute and second; the rate of change of temperature is therefore given in ℃/(h/min/s). Other units may also be used for representation.

In conjunction with the above, the temperature change rate unit 5 may be configured as a device having a calculation function or directly employ the calculation function carried by the controller 1. If the temperature change rate unit 5 is configured as a device with a calculation function, a person skilled in the art needs to consider whether a power supply signal, an enable signal or a driving circuit needs to be switched on or not according to actual requirements.

The output end of the temperature change rate unit 5 is in signal connection with the rate comparator U0, and since the second temperature signal collected by the second ambient temperature probe is used when the temperature rate is changed from small to large, the positive phase input end of the rate comparator U0 is in signal connection with the controller 1. This is because the signal output by the temperature change rate unit 5 is a digital signal, and the digital signal output by the temperature change rate unit 5 is converted into an analog signal by the controller 1 and then input to the non-inverting input terminal of the rate comparator U0.

The inverting input of the rate comparator U0 is connected to a reference value Vref0 representing the set rate. The output end of the speed comparator U0 is connected to the controller 1 through a signal, the controller 1 is connected to a selector switch 11 through a signal, the selector switch 11 includes a normally closed end and a normally open end, the normally closed end is connected to the first environment temperature measuring probe 41, and the normally open end is connected to the second environment temperature measuring probe 42.

When the controller 1 receives the high level signal output by the rate comparator U0 and converts the high level signal into a corresponding control signal, the normally closed end is opened, and the normally open end is closed, so that the second temperature signal output by the second environment temperature measuring probe 42 is input into the determining unit 6 and is used as a determining basis. When the controller 1 receives the low level signal output by the rate comparator U0 and converts the low level signal into a corresponding control signal, the normally closed end and the normally open end are kept in an initial state, and at this time, the first ambient temperature signal output by the first ambient temperature probe 41 is input into the determining unit 6 and is used as a determining basis.

It should be noted that the normally closed end and the normally open end are only used for describing the state, that is, the normally closed end is closed, the first environment temperature measuring probe 41 outputs the first temperature signal to the determining unit 6, the normally open end is open, and the second environment temperature measuring probe 42 outputs the second temperature signal to the determining unit 6, which is in the initial state. In the above state, when the temperature is in the first temperature range in many cases, and when the temperature is in the second temperature range in actual use in many cases, the normally open end and the normally closed end may be arranged opposite to each other.

In conjunction with the above description, the selection switch 11 may be configured as a single-pole double-throw switch, or may be configured as two separate switches, and only needs to be controlled by the signal output by the controller 1, such as controlling the electromagnetic valve through the driving circuit.

The rate comparator U0 also needs to be connected to a power supply or the like, and those skilled in the art can supplement the rate comparator according to the conventional technology.

Further, referring to fig. 4, the output end of the judging unit 6 is connected with a first temperature switch S1 and a second temperature switch S2 through a signal of the controller 1, and the first temperature switch S1 and the second temperature switch S2 are arranged in parallel, one end of the first temperature switch S1 far away from the judging unit 6 is connected with the first heating wire 311 through a signal, and one end of the second temperature switch S2 far away from the judging unit 6 is connected with the second heating wire 312, the third heating wire 313 and the fourth heating wire 314 through a signal. The first temperature switch S1 and the second temperature switch S2 may be set as switches controllable by the controller 1, such as a relay, and if the first temperature switch S and the second temperature switch S are set as relays, a driver circuit capable of driving the relays and a power signal suitable for the relays to operate need to be set by a person skilled in the art at the same time.

In an embodiment, the determining unit 6 includes a first comparator U1 and a second comparator U2, and the first comparator U1 and the second comparator U2 also need to access signals such as power, and similar to the rate comparator U0, a person skilled in the art needs to access power additionally according to a conventional technology.

The inverting input terminal of the first comparator U1 is connected to the first environment temperature probe 41 and the second environment temperature probe 42, wherein the first environment temperature probe 41 and the second environment temperature probe 42 are connected in parallel. The positive phase input end of the first comparator U1 is connected with a first temperature range threshold value Vref1, the first temperature range threshold value Vref1 represents 0 ℃, and when the first temperature signal or the second temperature signal is less than 0 ℃, the first comparator U1 outputs a high level signal.

Output end signal connection in controller 1 of first comparator U1, controller 1 receive the high level signal of first comparator U1 output, then convert into and can make the closed signal of first temperature switch S1, and when first temperature switch S1 closed back, first heater strip 311 has got the electricity and begins the heating. When the first comparator U1 outputs a low level signal, the controller 1 does not output a corresponding control signal, which indicates that the ambient temperature is greater than 0 ℃.

The first comparator U1 is mainly used to determine whether the ambient temperature is in the first temperature range, and the second comparator U2 is used to determine whether the ambient temperature is in the second temperature range, and the second comparator U2 is described below.

Similarly, the inverting input terminal of the second comparator U2 is connected to the first environment temperature probe 41 and the second environment temperature probe 42 via signals, wherein the first environment temperature probe 41 and the second environment temperature probe 42 are connected in parallel. The non-inverting input terminal of the second comparator U2 is connected to a second temperature range threshold Vref2, in this embodiment, the second temperature range threshold Vref2 represents-15 ℃, and when the first temperature signal or the second temperature signal is smaller than-15 ℃, the second comparator U2 outputs a high level signal.

The output end signal of the second comparator U2 is connected to the controller 1, the controller 1 receives the high level signal output by the second comparator U2, and then converts the high level signal into a signal capable of closing the second temperature switch S2, and after the second temperature switch S2 is closed, the second heating wire 312, the third heating wire 313 and the fourth heating wire 314 are powered on to start heating. When the ambient temperature is less than-15 ℃, it is also less than 0 ℃, therefore, the first comparator U1 also outputs a high level signal at this time, and keeps the first heating wire 311 in a heating state.

In this embodiment, before controlling the third heating wire 313 and the fourth heating wire 314 to heat, the controller 1 delays the time by the delay unit 12, and the delay time before controlling the fourth heating wire 314 to heat is longer than the delay time before controlling the third heating wire 313 to heat, so as to form the purpose of turning on the second heating wire 312, the third heating wire 313 and the fourth heating wire 314, and further turn on the plurality of heating wires 31 to reduce the instantaneous power.

In order to better set the time interval between the first heating wire 311 and the second heating wire 312, a time delay 12 may be provided before the second heating wire 312, and the time delay is less than the time delay of the third heating wire 313 and the fourth heating wire 314. The interval time between the two adjacent heating wires 31 being activated in the embodiment of the present application may be set to 15s.

When the second comparator U2 outputs a low level signal, the controller 1 does not output a corresponding control signal, which indicates that the ambient temperature is greater than 15 ℃.

In this embodiment, it is advantageous to facilitate the detection of a change in the ambient temperature from a first temperature range to a second temperature range, while the first temperature switch S1 controls the first heating wire 311 alone and the second temperature switch S2 controls the second heating wire 312, the third heating wire 313 and the fourth heating wire 314. Since the first heating wire 311 is frequently used, the independent control facilitates the replacement of the first heating wire 311, which is worn more quickly, by the worker. The disadvantage is that the first comparator U1 and the second comparator U2 need to work simultaneously, increasing the loss of the second comparator U2.

In this embodiment, the first temperature signal or the second temperature signal may be simultaneously inputted to the first comparator U1 and the second comparator U2, and the second temperature switch S2 is signal-connected to the first heating wire 311.

Referring to fig. 5, in another embodiment, the first temperature signal or the second temperature signal is preferentially input to the second comparator U2, an output end of the second comparator U2 is connected to an inverter N, and an output end of the inverter N is connected to the controller 1.

The controller 1 is connected with a coil of a relay K through signals, one end of a switch of the relay K is connected with the first temperature measuring probe and the second temperature measuring probe through signals, and the other end of the switch of the relay K is connected with one input end of the first comparator U1 through signals.

The input ends of the first comparator U1 and the second comparator U2 are connected with the same device or signal.

After the first temperature signal or the second temperature signal is input into the second comparator U2, if the ambient temperature is within the first temperature range, the first temperature signal or the second temperature signal is input into the second comparator U2 first, and at this time, the second comparator U2 outputs a low level signal, and the controller 1 does not output a control signal.

At this moment, the phase inverter N can invert the low level signal and output the low level signal as a high level signal, the low level signal is converted into a signal capable of closing the relay K through the controller 1, the first temperature signal or the second temperature signal after the relay K is closed can be input into the first comparator U1, the first comparator U1 outputs the high level signal, the signal capable of closing the first temperature switch S1 is converted into the signal capable of closing the first temperature switch S1 through the controller 1, and when the first temperature switch S1 is closed, the first heating wire 311 is electrified to start heating.

When the ambient temperature is within the second temperature range, the second comparator U2 outputs a high level signal, and then converts the high level signal into a signal capable of closing the second temperature switch S2, and when the second temperature switch S2 is closed, the first heating wire 311, the second heating wire 312, the third heating wire 313 and the fourth heating wire 314 are powered on to start heating.

In this embodiment, the first heating wire 311, the second heating wire 312, the third heating wire 313 and the fourth heating wire 314 are arranged in parallel, and the time delays 12 are arranged between the controller 1 and the controller 1 of the second heating wire 312, the third heating wire 313 and the fourth heating wire 314, and the time delay time is sequentially increased or decreased progressively. After receiving the high level signal, the controller 1 can sequentially heat the first heater wire 311, the second heater wire 312, the third heater wire 313 and the fourth heater wire 314, or the first heater wire 311, the fourth heater wire 314, the third heater wire 313 and the second heater wire 312. The position and time of the delay 12 can be adjusted so that the four heating wires 31 are heated at different times.

It should be noted that when the second comparator U2 outputs a high level, the first comparator U1 does not perform the comparison operation, so that this embodiment has an advantage that when the ambient temperature is in the second temperature range, the first comparator U1 does not need to perform the comparison operation, and the loss of the first comparator U1 is reduced. The disadvantage is that when the ambient temperature changes from the first temperature range to the second temperature range, the first heating filament 311 will be briefly switched off and then switched on again, increasing the wear of the first heating filament 311.

In the above two embodiments, the first comparator U1 and the second comparator U2 both need to be connected to a power supply, and similarly, other components in the embodiments of the present application also need to be connected to the power supply or an enable signal according to common knowledge in the art by a person skilled in the art, and the power supply needs to be determined according to characteristics of each component.

The application principle of a low-power consumption low temperature molecular sieve section of thick bamboo of this application embodiment does: the change rate of the second temperature signal output by the second temperature probe is calculated by the temperature change rate unit 5, if the change rate of the second temperature signal is smaller than a reference value Vref0, the first temperature signal output by the first temperature probe is selected as a judgment basis, and if the change rate of the second temperature signal is larger than the reference value Vref0, the second temperature signal output by the second temperature probe is selected as a judgment basis.

After the judgment basis is determined, whether the current environment temperature is in the first temperature range or the second temperature range is determined through the first comparator U1 and the second comparator U2. When the ambient temperature is in the first temperature range, the first heating wire 311 is started to heat; when the ambient temperature is in the second temperature range, the four heating wires 31 are started in sequence, so that the instantaneous power of the starting of the heating wires 31 is effectively reduced, the safety of the molecular sieve cylinder is effectively improved, and the service life is prolonged.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The low-power-consumption low-temperature molecular sieve cylinder is characterized by comprising a cylinder body (2), wherein a plurality of heating elements (3) are arranged on the outer side of the cylinder body (2), and the plurality of heating elements (3) are arranged in parallel;

the heating element (3) is in signal connection with the controller (1), and the controller (1) is used for starting the heating element (3) to heat; when the ambient temperature is within the set temperature range, the controller (1) sequentially starts the plurality of heating members (3).

2. The low-power-consumption low-temperature molecular sieve cylinder is characterized in that the set temperature range is detected by a temperature measuring part (4), the temperature measuring part (4) is in signal connection with a judging unit (6), and the output end of the judging unit (6) is provided with a first temperature switch S1 and a second temperature switch S2;

the first temperature switch S1 corresponds to a first temperature range, and the first temperature switch S1 is connected with one of the heating elements (3) in a signal mode;

the second temperature switch S2 corresponds to a second temperature range, the second temperature switch S2 is in signal connection with the plurality of heating elements (3), and the plurality of heating elements (3) are controlled by the controller (1) to be sequentially started;

wherein the temperature of the first temperature range is higher than the second temperature range.

3. The low-power consumption low-temperature molecular sieve cylinder according to claim 2, wherein the judging unit (6) comprises a first comparator U1 and a second comparator U2,

two input ends of the first comparator U1 are respectively in signal connection with the temperature measuring part (4) and a first temperature range threshold value Vref1, and the output end of the first comparator U1 is in signal connection with the controller (1) and the first temperature switch S1 in sequence; when the temperature measuring signal output by the temperature measuring part (4) is in the first temperature range, the controller (1) outputs a first switch signal to the first temperature switch S1, so that the first temperature switch S1 is closed, and at the moment, one of the heating parts (3) starts to heat;

two input ends of the second comparator U2 are respectively in signal connection with the temperature measuring part (4) and a threshold value Vref2 of a second temperature range, and the output end of the second comparator U2 is in signal connection with the controller (1) and the second temperature switch S2 in sequence; when the temperature measuring signal output by the temperature measuring part (4) is in the second temperature range, the controller (1) outputs a second switch signal to the second temperature switch S2, so that the second temperature switch S2 is closed, other heating parts (3) start to heat in sequence, and the other heating parts (3) are all the heating parts (3) except one of the heating parts (3).

4. The low-power consumption low-temperature molecular sieve cylinder according to claim 2, wherein the judging unit (6) comprises a first comparator U1 and a second comparator U2,

two input ends of a second comparator U2 are respectively in signal connection with the temperature measuring part (4) and a threshold value Vref2 accessed to a second temperature range, and the output end of the second comparator U2 is in signal connection with the controller (1) and the second temperature switch S2 in sequence; when the temperature measurement signal output by the temperature measurement part (4) is within the second temperature range, the controller (1) outputs a second switch signal to the second temperature switch S2, so that the second temperature switch S2 is closed, and the heating parts (3) start to heat in sequence; wherein the plurality of heating members (3) includes the one of the heating members (3) and the other of the heating members (3);

the output end of the second comparator U2 is in signal connection with a phase inverter N, the output end of the phase inverter N is in signal connection with the controller (1), the controller (1) is in signal connection with a coil of a relay K, two switch ends of the relay K are in signal connection with the temperature measuring part (4) and one input end of the first comparator U1 respectively, and the other input end of the first comparator U1 inputs a first temperature range threshold Vref1;

the output end of the first comparator U1 is sequentially in signal connection with the controller (1) and the first temperature switch S1, when the temperature measuring signal output by the temperature measuring part (4) is within the first temperature range, the controller (1) outputs a first switch signal to the first temperature switch S1, so that the first temperature switch S1 is closed, and at the moment, one of the heating parts (3) starts to heat.

5. The low-power-consumption low-temperature molecular sieve cylinder as claimed in claim 3 or 4, wherein a time delay unit (12) is arranged between each other heating element (3) and the second temperature switch S2, and the time delay time of each time delay unit (12) is different;

each delayer (12) and the corresponding heating element (3) form a branch, and a plurality of branches are connected in parallel.

6. The low-power consumption low-temperature molecular sieve cylinder according to claim 2, wherein the temperature measuring part (4) comprises a first environment temperature measuring probe (41) and a second environment temperature measuring probe (42), the first environment temperature measuring probe (41) is arranged on the inner side of the cylinder body (2), and the second environment temperature measuring probe (42) is arranged on the outer side of the cylinder body (2);

when the change rate of the environmental temperature is lower than the set rate, the temperature detected by the first environmental temperature measuring probe (41) is used as a judgment basis, and when the change rate of the environmental temperature is higher than the set rate, the temperature detected by the second environmental temperature measuring probe (42) is used as a judgment basis; the judgment basis refers to data input by the input end of the judgment unit (6).

7. The low-power consumption low-temperature molecular sieve cylinder according to claim 6, wherein the second environment temperature measuring probe (42) is in signal connection with a temperature change rate unit (5), and the second environment temperature measuring probe (42) and the temperature change rate unit (5) are in signal connection with the controller (1);

the controller (1) receives and forwards a second temperature signal output by the second environment temperature measuring probe (42), and when the controller (1) forwards the second temperature signal to the temperature change rate unit (5), a time signal is sent at the same time;

after receiving the second temperature signal and the time signal, the temperature change rate unit (5) calculates a temperature change rate according to a set formula and outputs the temperature change rate to the controller (1), and the controller (1) determines whether to judge according to the second temperature signal according to the temperature change rate.

8. The low-power-consumption low-temperature molecular sieve cylinder is characterized in that the heating element (3) comprises a heating wire (31) and a heat conducting film (32), the heat conducting film (32) is laid on the outer side wall of the cylinder body (2), and the heating wire (31) is arranged on the side, away from the cylinder body (2), of the heat conducting film (32);

the heating wire (31) is in signal connection with the controller (1), the controller (1) enables the heating wire (31) to be electrified, and the heating wire (31) starts to be heated after being electrified.

9. The low-power-consumption low-temperature molecular sieve cylinder according to claim 8, wherein a side of the heating wire (31) far away from the heat conducting film (32) is provided with a heat insulating film (33), and the heat insulating film (33) covers the cylinder body (2).

10. A low power consumption and low temperature molecular sieve cartridge as claimed in claim 1, wherein the heating zone generated by the heating element (3) covers the molecular sieve cartridge.

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