SI25471A - Vacuuming device for external vacuuming and food bags welding - Google Patents

Abstract

The invention belongs to the field of small household appliances, and more specifically to the field of external apparatus for the vacuum packing of food products. The essence of the apparatus for the external vacuuming and welding of food bags according to the invention is that it includes a device for attaching a bag before and during vacuuming, a mechanism for automatically opening the cover of the apparatus at the end of the process in automatic operation and a system for automatically switching off the welding tape which the temperature sensor detects the operating temperature and the sensor triggers the electronic shut off of the heating of the welding tape.

Description

Apparatus for external vacuuming and welding of food bags

Field of technology

The invention belongs to the field of small household appliances, more precisely to the field of household appliances for vacuum packaging of food products.

Technical problem

The invention is based on the problem of how to combine several functions in one apparatus, which would enable the optimization of the process of preparation and vacuuming of food itself. The problem that is always present when storing and vacuuming food for long-term storage or storing such packaged food in the refrigerator or freezer is that the air from the bag is difficult to exhaust almost completely and that the weld is reliable. In the case of a household appliance, it is desirable that the task be as simple as possible, or. that it is not necessary in the process of vacuuming the food to additionally deal with lifting the lid and estimating the length of the welding time of the bag. The mechanism of the appliance should be simple and partially automated, so that the process of vacuuming and welding the food bag is independent of the feeling of the time of welding the bag as well as the skills of the user of the appliance.

When welding a food bag, the problem is the regulation of the temperature of the welding element or the welding time, so that the device enables vacuuming with an optimal airtight weld and works as quickly as possible. All existing welding systems are based on a selected welding duration, which is constant or can be changed exclusively in a mechanical way by user assessment and pressing a certain button. In the case of several consecutive cycles, the welding system overheats and in most vacuum bags for external vacuuming it no longer provides optimal working conditions, as due to overheating or overheated bags suck less and less air out of the bag, thus reducing the quality of food storage, and at the same time more energy is used than necessary, and due to the overheated bag, the weld becomes of poor quality. At the same time, the cycle is simply too long and we are wasting unnecessary time.

The problem of moving the food-filled bag from the optimal vacuuming position and unwanted movement due to the weight of the food arises because it is not possible or very difficult to hold the bag in the vacuum position and lower the lid at the same time. In practice, this proves to be a problem that causes more foil to be used, as bags are used that are much longer than optimal so that they can be well vacuumed and welded.

The prior art

Many devices for external vacuuming of food with the basic elements of exhausting air from food bags and bag welding are known. Bag fastening systems with additional rods, clips and springs are known, as well as with installation in certain grooves, which require a lot of time for fastening and do not guarantee holding in the optimal position.

Known locking systems provide only two end positions, locked and unlocked without the possibility of regulation. Welding bar lifting systems are also known, but always with an appliance locking function and a constant welding time, which does not ensure optimal working conditions in sequential operation.

In European patent no. 1564148 describes a device for creating a vacuum in containers for preserving vacuum-packed products. It consists of a housing and a cover and a system for exhausting air from a bag, which is placed in a roll in the lower part of the housing. The bag cut allows the system to close and cut the bag.

CN 203601618U describes a food vacuuming device having an air exhaust system and a bag welding system designed differently from the present invention.

With known systems on external vacuum cleaners, the user has one hand occupied to lift and hold the lid, so that more time is spent setting up the bag. Welding bar lifting systems are also known, but always with an appliance locking function and a constant welding time, which does not ensure optimal working conditions in sequential operation. According to the invention, the known systems in vacuum apparatus are optimized in a simple and efficient way.

Description of the solution to the technical problem

The essence of the apparatus for external vacuuming and welding of food bags according to the invention is that it includes a device for attaching the bag before and during vacuuming, a mechanism for automatically opening the lid of the apparatus at the end of the process in automatic operation and a system for automatic shutdown of the welding tape. the temperature sensor detects the operating temperature and the sensor triggers the electronic switch-off of the welding tape heating.

The apparatus for vacuuming and welding food bags according to the invention will be described in more detail below on the basis of an exemplary example and figures showing:

Figure 1 external appearance of an apparatus for external vacuuming and welding of food bags

Figure 2 Appearance of the appliance with the lid raised

Figure 3 section C - C

Figure 4 cover locking mechanism

Figure 5 detail with temperature control

Figure 6 section A - A showing the temperature control

Figure 7 is a partial view of the cover 2 from above

Figure 8 is a partial view of the cover 2 showing the lock 8

Figure 9 section C-C showing the spring for lifting the cover

The apparatus for external vacuuming and welding of food bags according to the invention contains all already known functional units, such as a vacuum pump in connection with a system for pumping air from food bags, electronics, welding tape for welding and a mechanism for closing the lid. and implemented in a new way.

As shown in Figure 1, the apparatus for external vacuuming and welding of food bags has a housing 1 consisting of a lower part 12, an upper part 11 and a cover 2. The housing 1 has the shape of a U-shaped in lateral line with the lower part 12 semicircular part, continues to the upper part 11. On the upper part 11 of the housing 1 there is a control plate 111 in the middle. The upper part 11 has a tapered part 11 a on the left and a narrowed part 11b on the right, which have a spring bearing 15 in the upper end. and installing the cover handles 21 a and 21 b 2.

The handle 21 b of the cover 2 is designed as a mirror image of the handle 21 a, which in the lower part also has a bearing 21 a 'for installing the spring 15. The first spring 15 is placed on one side between the tapered part 11a and the handle 21 a, on the other side however, a second spring 15 is arranged between the tapered portion 11b and the handle 21b. When the cover 2 is raised, the pair of springs 15 is clamped and unloaded, and when the cover is lowered, it is loaded or unloaded. tense (see Figure 9).

The cover 2 has an outer circular strip 21 between the handle 21 a and the handle 21 b, which coincides in shape with the semicircular radius of the outer strip 123 of the lower side 12 of the housing 1 (see Fig. 2). Inside the upper part 22 of the cover 2, a first bracket 24a is attached on the left side and a second bracket 24b on the right side for mounting the locks 8 and 8 '(see Figure 7). The bracket 24a has a round hole in the middle into which the short axis 8c of the lock 8 is mounted (see Fig. 8). The short axis 8c acts as a pin. Coaxial with the centreline of the round hole in the bracket 24a is the round hole in the bracket 24b, where the short lock axis 8 'is mounted. Parallel to the first support 24a is the third support 24c and on the other side, parallel to the second support 24b is the fourth support 24d. A lock 8 is installed between the bracket 24a and the bracket 24c. The eccentric 10 of the lock 8 is connected via an axis 25 to the eccentric 10 'of the lock 8', which is located between the bracket 24d and the bracket 24b. The eccentric 10 is located between the lever 8a and the lever 8b of the lock 8 (see Fig. 4). The lock 8 is designed as a pliers, where the handles 8a and 8b are movably connected to an axis 8c which is closer to the upper part of the lock 8. At the other end of the lock 8 is between the notch 8a 'on the handle 8a and the notch

8b 'a spring 8d is mounted on the handle 8b. The lock 8 'is the same as the lock 8. The eccentric 10 and 10' have an ellipse shape in cross section. Both eccentrics are mounted on axis 25.

The cover 2 has locks 8 and 8 'in the part 22 facing the lower side 11 of the housing 1, the upper part 9a of the vacuum chamber 9 and the silicone push elements 23 of the welding strip 4. The top of the lock 8 and 8' through the openings 22b and 22a allows grip with fixing pins 121 a and 121 b on the left and right sides of the inner part 121 of the housing

1. The lower part of the vacuum chamber 9 and the assembly of the welding bar 7 are also on the part 121, under which the welding strip 4 with the sensor 4a is placed (see Figures 5 and 6). Sensor 4a measures the temperature of the welding strip 4 and when the temperature of the welding strip 4 is optimal for welding according to the manufacturer's wishes, the electronic heating of strip 4 is activated. The optimum temperature is reached in the first vacuum cycle, as the strip goes from cold to optimal temperature. , e.g. 10 seconds at a bag thickness of 130 microns. However, the time for vacuuming and welding the next bag is shorter and it is not necessary to wait ten seconds, because the welding strip 4 has a faster optimum temperature due to the preheating from the previous cycle. When the sensor 4a measures the optimum temperature, the electronics are activated, which switches off the heating of the welding strip 4. As a result, the temperature control of the welding strip 4 is performed automatically during the welding of the bag.

The welding machine can have automatic operation and manual operation. In automatic operation, after closing the cover 2, the electronic circuit is automatically activated via the electronic sensor, which switches on the vacuum pump and when the pre-programmed vacuum (vacuum) is reached, the heating of the welding strip 4 is started. the lid lifts automatically after filling the vacuum chamber with air (venting the system).

In manual mode, the welding machine works by closing the lid 2 and locking it with the handle 10a after placing the food bag on the adhesive tape for fixing the bag, followed by pressing the START / STOP button, which activates the vacuum pump. Pressing the START / STOP button starts the operation of the vacuum pump and the user presses the WELDING button on the basis of the built-in manometer 112 or on the basis of an assessment of when enough air has been pumped out of the bag. The bag is welded and after switching off the vacuum pump, the vacuum chamber 9 is filled with air and the cover 2 is released. The cover 2 is unlocked with the handle 10a and allows a pair of springs 15 located in the covers 21 a and 21 b of the cover 2 to operate automatically.

The vacuum chamber 9 or the created vacuum maintains the position of the cover 2 in close contact with the welding strip 4, which allows the temperature of the strip 4 to be measured via sensor 4a. In several consecutive cycles of vacuuming food bags, the accumulated temperature is measured in the welding strip 4. and consequently triggers a shortening of the welding time. The amount of energy used for welding and also the apparatus itself is more than halved, and the vacuum conditions of the bag remain constant. The system ensures optimal vacuum in the bag from the first to the last cycle and saves time and energy.

The present invention solves the problem of unwanted movement of the bag 6 from the optimal position for vacuuming, which can occur due to the weight of food, too short bag and inability to keep the bag in the right place in the vacuum chamber 9 during lowering the lid 2. In practice, this is a serious problem. consumes more foil, as bags are used that are much longer than optimal so that they can be well vacuumed and welded. Fastening is solved with double-sided self-adhesive tape 3 which is placed between the welding tape 4 and the front radius 123 of the bottom 12. The adhesive tape 3 can be in front of or behind the welding tape 4 and also in front of the vacuum chamber 9. Fastening is done simply by bag 6 place in optimal position and press on adhesive tape 3. Instead of double-sided adhesive tape 2, the adhesive can be arranged within a seemingly narrow rectangle in any shape such as dots, lines, squares, triangles, ellipses and similar regular and irregular shapes. The appliance may have one, two, three or four welding strips 4.

Automatic lifting and holding of the lid 2 in the raised state solves the problem of manipulating the respective bag 6 with both hands after the end of the vacuum cycle and setting new ones without the need to contact the lid 2 or hold it.

With known systems on external vacuum devices, the user has one hand occupied to lift and hold the lid and consequently spends more time adjusting the bag 6. The flexible locking system (Fig. 4) of the lid 2 solves the problem with the height of the vacuum chamber seals 9 reusable. In practice, it is possible that the seals are of different heights and densities due to different suppliers, which is important for service and maintenance needs. This problem is solved by increasing the stroke of the eccentric 10 on the lock 8 and consequently increasing the stroke of the lock 8. At the same time, the position of the eccentric 10 ensures the self-braking of the lock system 8. The position of the lever 10a 10a in the off position that the seals 9 are not in working contact, which ensures their durability and quality.

Claims (8)

.Patent claims 1. An apparatus for external vacuuming and welding of food bags includes a device for attaching the bag before and during vacuuming, a system for automatically regulating the temperature of the welding strip with a temperature sensor and a mechanism for automatically opening the lid of the apparatus at the end of the process. Apparatus for external vacuuming and welding of bags according to claim 1, characterized in that the bag fastening device is a double-sided adhesive tape and / or adhesive arranged within a seemingly narrow rectangle in any shape, such as dots, lines, squares, triangles, ellipses and similar regular and irregular shapes. Apparatus for external vacuuming and bag welding according to Claims 1 and 2, characterized in that the system for automatic temperature control of the welding strip (4) is enabled by a temperature sensor (4a) which detects the operating temperature and triggers the electronic switching off of the welding strip heating. (4). Apparatus for external vacuuming and welding of bags according to any one of claims 1 to 3, characterized in that it has a housing (1) consisting of a lower part (12), an upper part (11) and a cover (2); that in the lateral line it has the shape of a horizontal letter U with the lower part (12) continuing along the semicircular part into the upper part (11); that the upper part (11) has a tapered part (11 a) on the left side and a tapered part (11 b) on the right side for installing the handles (21 a and 21 b) of the cover (2); that the handle (21 b) of the cover (2) is designed as a mirror image of the handle (21 a) having a spring (15) 'in the lower part for accommodating the spring (15); that the first spring (15) is positioned on one side between the constricted part (11 a) and the handle (21 a) and on the other side a second spring (15) is arranged between the constricted part (11 b) and the handle (21 b); that when the cover (2) is raised, the pair of springs (15) is clamped and unloaded and when the cover is lowered, it is loaded or unloaded. tense. Apparatus for external vacuuming and bag welding according to any one of claims 1 to 4, characterized in that the cover (2) has a first support (24a) attached to the left side inside the upper part (22) and a second support on the right side. (24b) for fitting locks (8 and 8 '); that the bracket (24a) has a round hole in the middle in which the short axis (8c) of the lock (8) is mounted; that the short axis (8c) acts as a pin; that coaxial with the center line of the round hole in the carrier (24a) is a round hole in the carrier (24b) where the short lock axis (8 ') is mounted; that the third support (24c) is parallel to the first support (24a) and the fourth support (24d) is parallel to the second support (24b); that a lock (8) is installed between the bracket (24a) and the bracket (24c); that the eccentric (10) of the lock (8) is connected via an axis (25) to an eccentric (10 ') of the lock (8') located between the bracket (24d) and the bracket (24b); that the eccentric (10) is located between the handle (8a) and the handle (8b) of the lock 8; that the lock (8) is designed as pliers, where the handles (8a and 8b) are movably connected to an axis (8c) closer to the top of the lock (8); that a spring (8d) is arranged at the other end of the lock (8) between the notch (8a ') on the handle (8a) and the notch (8b') on the handle (8b); that the lock (8 ') is the same as the lock (8); that the eccentric (10 and 10 ') has an elliptical shape in cross section; that the cover (2) in the part (22) facing the lower side (11) of the housing (1) has installed locks (8 and 8 '), the upper part (9a) of the vacuum chamber (9) and the pushing silicone elements (23) of the welding tape (4); that the top of the lock (8 and 8 ') through the openings (22b and 22a) allows grip with the fixing pins (121a and 121b) on the left and right side of the inner part (121) of the housing (1). Apparatus for external vacuuming and bag welding according to any one of claims 1 to 5, characterized in that the vacuum chamber 9 or the generated vacuum maintains the position of the cover 2 in close contact with the welding strip 4, which allows measuring the temperature of the strip 4a. . Apparatus for external vacuuming and bag welding according to any one of claims 1 to 6, characterized in that the adhesive tape (3) can be in front of or behind the welding tape (4) and also in front of the vacuum chamber (9). Apparatus for external vacuuming and bag welding according to any one of claims 1 to 7, characterized in that the apparatus has one, two, three or four welding strips (4).