SMART HEAT SEALING METHOD FOR VACUUM PACKAGING

Abstract

The disclosure provides a smart heat sealing method for vacuum packaging, comprising steps of: recording a time interval ?t between two adjacent starts of a heating device which is continuously started a number of times; recording a number k of starts of the heating device; obtaining a first heating coefficient p.sub.1 based on ?t, obtaining a second heating coefficient p.sub.2 based on k, selecting the heating constant t depending on specified parameters and performance of the vacuum package machine, and calculating the heating time T for next operation of the heating device by a formula T=p.sub.1*p.sub.2*t based on p.sub.1, p.sub.2, and t. It solves the heat accumulation problem of the heating device caused by too much repeated use or overuse in short time interval, and thus avoids unsuccessful vacuuming and solves the problem of poor heat sealing effect, and greatly improves user experience.

Claims

1. A smart heat sealing method for vacuum packaging, comprising steps of: recording a time interval ?t between two adjacent starts of a heating device which is continuously started a number of times; recording a number k of starts of the heating device; obtaining a heating time T of the heating device for next operation based on ?t and k; and resetting k as 1 when ?t?600 s.

2. The smart heat sealing method for vacuum packaging according to claim 1, comprising obtaining a first heating coefficient p.sub.1 from a preset database based on ?t, obtaining a second heating coefficient p.sub.2 from a preset database based on k, and calculating the heating time T of the heating device after current activation by a formula T=p.sub.1*p.sub.2*t based on p.sub.1and p.sub.2, wherein t indicates a time constant selected depending on a specified parameter and performance of a vacuum package machine.

3. The smart heat sealing method for vacuum packaging according to claim 2, wherein the first heating coefficient p.sub.1 and the time interval ?t have relationships as follows: $\mathrm{if}0<?t<t_1,0<p_1<1;$ $\mathrm{if}{t}_1??t<t_2,p_1=1;\mathrm{and}$ $\mathrm{if}?t>t_2,p_1>1;$ wherein, t.sub.1 and t.sub.2 are preset values.

4. The smart heat sealing method for vacuum packaging according to claim 3, wherein t.sub.1 is 25 s and t.sub.2 is 600 s.

5. The smart heat sealing method for vacuum packaging according to claim 4, wherein, if 0<?t<25 s, p.sub.1=0.6.

6. The smart heat sealing method for vacuum packaging according to claim 4, wherein, if 0<?t<25 s, p.sub.1=0.8.

7. The smart heat sealing method for vacuum packaging according to claim 4, wherein, if ?t>600 s, p.sub.1=1.2.

8. The smart heat sealing method for vacuum packaging according to claim 2, wherein the second heating coefficient p.sub.2 and the number k of starts have relationships as follows: $\mathrm{if}k=1,p_2>1;$ $\mathrm{if}1<k?K,p_2=1;\mathrm{and}$ $\mathrm{if}k>K,0<p_2<1;$ wherein K indicates a critical value of the number of times of continuous starts of the heating device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The sole FIGURE is a process flow diagram which illustrates calculation of heating time T of a smart heat sealing method for vacuum packaging according to an embodiment of the disclosure.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

[0022] The embodiments of the disclosure will be further explained below in detail with reference to drawings and embodiments. The embodiments are illustrative and are not intended to limit the scope of the invention.

[0023] It should be noted that the terms such as front and rear used in the description are only used to distinguish one element from another and are not intended to limit the scope. For example, front element may refer to rear element, and rear element may refer to front element, without departing from the scope of the disclosure. In the description, front side refers to the side of the vacuum package which faces the operating personnel.

[0024] Referring to the sole FIGURE, the disclosure provides a smart heat sealing method for vacuum packaging, comprising steps of: [0025] S1. Recording the time interval ?t between two adjacent starts of the heating device which is continuously started a number of times; [0026] S2. Recording the number k of starts of the heating device; [0027] S3. Obtaining the first heating coefficient p.sub.1 based on ?t; [0028] S4. Obtaining the second heating coefficient p.sub.2 based on k; [0029] S5. Selecting the heating constant t depending on specified parameters and performance of the vacuum package machine; and [0030] S6. Based on p.sub.1, p.sub.2, and t, calculating a heating time T of the heating device for next operation by a formula T=p.sub.1*p.sub.2*t.

[0031] Based on the above description, the smart heat sealing method for vacuum packaging of the disclosure can obtain the forthcoming heating time T of the heating device based on the time interval ?t between two starts of the heating device and the number k of starts of the heating device, and can achieve the real time and dynamic control of the heating time of the heating device.

[0032] In particular, the heating time T of the heating device of the disclosure can be calculated by the formula T=p.sub.1*p.sub.2*t, wherein p.sub.1 indicates the first heating coefficient obtained from the preset database based on ?t; p.sub.2 indicates the second heating coefficient obtained from the preset database based on k; and t indicates the time constant selected depending on specified parameters and performance of the vacuum package machine. The first heating coefficient p.sub.1 and the time interval ?t may have relationships as follows.

[00003]$\mathrm{If}0<?t<t_1,0<p_1<1;$$\mathrm{If}{t}_1??t<t_2,p_1=1;$$\mathrm{If}?t>t_2,p_1>1;$

[0033] Herein, t.sub.1 and t.sub.2 are preset values. In the embodiment of the disclosure, t.sub.1 may be 25 s, and t.sub.2 may be 600 s.

[0034] It can be seen that, if the number k of starts is fixed (i.e., p.sub.2 is kept in a corresponding interval and the value of p.sub.1 is critical for the heating time T of the heating device), the shorter the interval between two starts of the heating device, the less the heat dissipation time of the heating device. In such a case, the heating device has heat energy remained from previous heating. Consequently, in order to prevent the vacuum package from being overheated by the heating device operated too long, the heating time of the heating device should be reduced appropriately when the time interval between two starts of the heating device is relatively short (0<?t<t.sub.1). That is, 0<the first heating coefficient p.sub.1<1, and thus the heating time of the heating device can be reduced. When the time interval between two starts of the heating device tends to be normal (t.sub.1??t<t.sub.2), the heating time should be kept relatively stable. In such a case, the first heating coefficient p.sub.1=1. When the time interval between two starts of the heating device is too long (?t>t.sub.2), the heating device, which has enough time to complete heat dissipation in the long interval, has relatively low temperature. In such a case, the heating time of the heating wire should be increased to some extent, to ensure the effect of heating vacuum package.

[0035] In particular, in some embodiments of the disclosure, p.sub.1 may be preferably 0.6 or 0.8 when 0<?t<25 s, and preferably 1.2 when ?t>600 s.

[0036] Furthermore, the second heating coefficient p.sub.2 and the number k of starts may have relationships as follows.

[00004]$\mathrm{If}k=1,p_2>1;$$\mathrm{If}1<k?K,p_2=1;$$\mathrm{If}k>K,0<p_2<1;$

[0037] Herein, K indicates a critical value of the number of times of starts of the heating device.

[0038] It is apparent that, if the time interval ?t between two heating operations of the heating device is kept in a certain fixed interval (i.e., p.sub.1 is kept in a corresponding interval, t.sub.1 is kept greater than 1 or less than 1, and the value of p.sub.2 is critical for the heating time T of the heating device), when the number k of starts of the heating device=1, the heating device is started for the first time, and thus the heating time of the heating device should be increased due to cold start, so as to ensure the effect of the first time of heat sealing. In such a case, p.sub.2>1. Furthermore, when 1<the number k of starts of the heating devices?K, the heating device stably operates to heat. Thus, as long as the heating time of the heating device is unchanged, the heating device can keep stable heating. In such a case, p.sub.2=1. Moreover, when k>K, the heating device has accumulated some heat energy during repeated use. Thus, the heating time of the heating device should be reduced, to avoid inappropriate heat sealing caused by heat accumulation.

[0039] It should be noted that, depending on various heat sealing situations, if the time interval between two activations of the heating device is too long, the heating device can be determined as being completely cooled down. In such a case, the heating device should be operated in a manner of initial activation. That is, the heating device may be determined as being initially started. In the embodiment of the disclosure, the critical value may be set as 600 s. That is, if the time interval ?t between two starts of the heating device is greater than or equal to 600 s, k can be reset as 1, and the heating device may return to operating state after a long time of heating.

[0040] To sum up, the disclosure provides a smart heat sealing method for vacuum packaging, which measures the time interval ?t between two adjacent heating operations and the number k of starts of the heating device to achieve dynamic adjustment of current heating time T of the heating device. It solves the heat accumulation problem of the heating device caused by too much repeated use or overuse in short time interval, and greatly improves user experience.

[0041] All the above are merely some preferred embodiments of the disclosure. It should be noted that the disclosure is intended to cover various modifications and equivalent arrangements made by those skilled in the art and included within the principle of the disclosure.