A food vacuum sealing machine

Abstract

The utility model discloses a food vacuum sealer, including a vacuum sealer body, the vacuum sealer body is divided into an upper shell and a lower shell, the upper shell and the lower shell are respectively provided with vacuum grooves on their surfaces, the vacuum grooves are closed to form a sealed vacuum chamber, a vacuum pump, a control board and a filter assembly are arranged in the vacuum sealer body, at least two ventilation interfaces are arranged on the vacuum groove, including a first ventilation interface and a second ventilation interface, the two ventilation interfaces are arranged far apart, the first ventilation interface is connected to the vacuum pump, and the second ventilation interface is connected to the filter assembly; a control chip and a vacuum sensor are arranged on the control board, the control chip receives the signal of the vacuum sensor to control the amount of air sucked by the vacuum pump. The food vacuum sealer has a control chip, the control chip controls the amount of air in the packaging bag sucked by the vacuum pump according to the vacuum degree detected by the vacuum sensor, and intelligently vacuums to preserve dry, soft and wet food.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuuming, in particular to a food vacuum sealing machine. Background Art

[0002] A vacuum sealer is a tool that extracts the air from a food packaging bag, creates a vacuum inside the bag, and seals the bag opening.

[0003] Existing household vacuum sealers can vacuum seal food at home to increase the shelf life; for example, according to the Chinese patent with announcement number CN208868362 U, a general household vacuum sealer includes a vacuum sealer body, which is divided into an upper shell and a lower shell. The upper shell and the lower shell are respectively provided with vacuum grooves on their surfaces. The upper shell and the lower shell are buckled together to close the upper and lower vacuum grooves to form a sealed vacuum cavity. A vacuum pump sucks air in the vacuum cavity to form a negative pressure area in the vacuum cavity, forming a pressure difference inside and outside the food packaging bag, squeezing the food packaging bag with external air, and squeezing the air in the food packaging bag to seal the bag opening to achieve vacuum sealing of the food.

[0004] However, general vacuum sealers can only use vacuum pumps to quickly draw air, thereby drying and compressing the air in the packaging bag. For example, when users seal wet food with moisture, the moisture is often squeezed into the vacuum chamber due to excessively fast air drawing, which is very troublesome. For example, when sealing soft food like cakes, the food will be compressed, hardened, and damaged. Utility Model Content

[0005] The utility model aims to provide a food vacuum sealer, which has a control chip inside. The control chip controls the amount of air in a packaging bag sucked by a vacuum pump according to the vacuum degree detected by a vacuum sensor, and intelligently vacuums to preserve dry, soft and wet food.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions: a food vacuum sealer, comprising a vacuum sealer body, the vacuum sealer body is divided into an upper shell and a lower shell, the upper shell and the lower shell are respectively provided with vacuum grooves on their surfaces, the vacuum grooves are closed to form a sealed vacuum chamber, a vacuum pump, a control board and a filter assembly are arranged in the vacuum sealer body, at least two ventilation interfaces are arranged on the vacuum groove, including a first ventilation interface and a second ventilation interface, the two ventilation interfaces are arranged far apart, the first ventilation interface is connected to the vacuum pump, and the second ventilation interface is connected to the filter assembly; a control chip and a vacuum sensor are arranged on the control board, and the control chip receives the signal of the vacuum sensor to control the amount of air sucked by the vacuum pump.

[0007] By adopting the above technical scheme, in the vacuum chamber of the vacuum sealer, the vacuum pump sucks air, the filter component replenishes air, the vacuum sensor detects the vacuum degree in the vacuum chamber, and the control chip controls the different amounts of air sucked by the vacuum pump according to the recorded program, so as to realize vacuum preservation of food with different properties such as dry, soft and wet.

[0008] The utility model is further configured as follows: the vacuum sensor is connected to the second ventilation interface, and the vacuum sensor detects the vacuum degree in the vacuum chamber.

[0009] The utility model is further configured as follows: a third ventilation interface is provided on the vacuum groove, the third ventilation interface is adjacent to the second ventilation interface, and the vacuum sensor is connected to the third ventilation interface.

[0010] The utility model is further configured as follows: the filter assembly is connected to the outside air and the vacuum chamber respectively, and the filter assembly filters the air.

[0011] The utility model is further configured as follows: locking buttons are respectively arranged on both sides of the upper shell, and locking grooves are correspondingly arranged on the lower shell, and the locking buttons and locking grooves lock the upper shell and the lower shell.

[0012] By adopting the above technical solution, the upper shell and the lower shell are locked to ensure the sealing of the vacuum chamber so as to quickly evacuate the vacuum chamber.

[0013] The utility model is further configured as follows: a heating and sealing mechanism is provided on the upper shell.

[0014] The utility model is further configured as follows: the control board is provided with a power supply circuit, a vacuum pump drive circuit, and a heating and sealing circuit; the control chip is respectively connected to the vacuum pump drive circuit and the heating and sealing circuit by signals; and the control chip outputs signals to control the vacuum pump drive circuit and the heating and sealing circuit.

[0015] The utility model is further configured as follows: the vacuum pump drive circuit includes a transistor Q3, inductors L1 and L2, the collector of the transistor Q3 is connected to the negative electrode of the vacuum pump, the base of the transistor Q3 is connected to the control chip, the transistor Q3 receives an output signal from the control chip to be turned on or off, and the inductors L1 and L2 are respectively connected to the positive input and negative output of the vacuum pump.

[0016] The utility model is further configured as follows: the heating and sealing circuit includes a bidirectional thyristor Q1 and a transistor Q2, the G pole of the bidirectional thyristor Q1 is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is connected to the circuit grounding point, and the base of the transistor Q2 is connected to the control chip.

[0017] The utility model is further configured as follows: the vacuum sealing machine has five functions: wet extraction mode, dry extraction mode, soft extraction mode, spot extraction mode, and stop.

[0018] Compared with the prior art, the utility model has the following beneficial effects: a control chip is provided in the food vacuum sealer, a vacuum pump sucks air on one side of the two sides of the vacuum chamber, and gas can be appropriately supplemented from the outside on the other side, a vacuum sensor detects the vacuum degree in the vacuum chamber, and the control chip controls the amount of air in the packaging bag sucked by the vacuum pump according to the vacuum degree detected by the vacuum sensor, and the food vacuum sealer realizes vacuum preservation of dry, soft and wet foods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an overall view of the food vacuum sealer in the embodiment.

[0020] Figure 2 1 is an internal view of the upper shell of the food vacuum sealer in the embodiment.

[0021] Figure 3 2 is a cross-sectional view of a food vacuum sealer in an embodiment.

[0022] Figure 4 1 is a schematic diagram of a power supply circuit of a food vacuum sealer in an embodiment.

[0023] Figure 5 It is a circuit schematic diagram of the control chip, buttons and indicator lights of the food vacuum sealer in the embodiment.

[0024] Figure 6 1 is a schematic diagram of a vacuum pump driving circuit of a food vacuum sealer in an embodiment.

[0025] Figure 7 1 is a schematic diagram of a heating and sealing circuit of a food vacuum sealer in an embodiment.

[0026] In the figure: 1. upper shell; 2. lower shell; 3. vacuum groove; 4. vacuum chamber; 5. vacuum pump; 6. control board; 7. vacuum sensor; 8. filter assembly; 9. first ventilation interface; 10. second ventilation interface; 11. third ventilation interface; 12. locking button; 13. locking groove. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0028] like Figure 1-3 As shown, the present embodiment discloses a food vacuum sealer, including a vacuum sealer body, which is divided into an upper shell 1 and a lower shell 2. The upper shell 1 and the lower shell 2 are hinged, and the upper shell 1 is flipped relative to the lower shell 2. A vacuum groove 3 is provided on the surface of the upper shell 1, and a vacuum groove 3 is also provided on the surface of the lower shell 2. After the upper shell 1 and the lower shell 2 are flipped and merged, the vacuum grooves 3 of the upper shell 1 and the lower shell 2 are closed to form a sealed vacuum chamber 4; locking buttons 12 are respectively provided on both sides of the upper shell 1, and locking grooves 13 are correspondingly provided on the lower shell 2. When working, the upper shell 1 and the lower shell 2 are closed, and the locking buttons 12 are locked in the locking grooves 13 under the elastic force of the spring. When opening, the locking buttons 12 on both sides are pressed, and the locking buttons 12 move against the elastic force of the spring and unlock the locking grooves 13, thereby opening the food vacuum sealer.

[0029] A heating and sealing mechanism is arranged outside the vacuum groove 3 of the upper shell 1. After the packaging bag is evacuated, the heating and sealing mechanism heats and seals the bag opening.

[0030] like Figure 2 , Figure 3 As shown, a vacuum pump 5, a control panel 6, a vacuum sensor 7 and a filter assembly 8 are arranged in the upper shell 1 of the food vacuum sealer. Three ventilation interfaces are arranged on the vacuum groove 3 of the upper shell 1. The ventilation interfaces are connected to the vacuum chamber 4 at the same time. The first ventilation interface 9 is connected to the vacuum pump 5 through a sealing tube, the second ventilation interface 10 is connected to the filter assembly 8 through a sealing tube, and the third ventilation interface 11 is connected to the vacuum sensor 7 through a sealing tube. The first ventilation interface 9 and the second ventilation interface 10 are arranged far apart. In this way, when the vacuum sealer is vacuuming and sealing wet food, the vacuum pump 5 sucks air to generate a negative pressure in the vacuum chamber 4. At the same time, the outside air enters the vacuum chamber 4 after being filtered by the filter assembly 8 under the action of the negative pressure. Because the first ventilation interface 9 and the second ventilation interface 10 are far apart from each other, one side of the package sucks air and the other side supplements the filtered fresh air, so that the pressure difference between the inside and outside of the packaging bag increases slowly, and the wet food in the packaging bag will not be sucked out of moisture due to the rapid suction of air by the vacuum pump 5. The vacuum sensor 7 detects the vacuum degree in the vacuum chamber 4, and stops the vacuum pump 5 after reaching the vacuum degree suitable for wet food.

[0031] In another embodiment, a permeable membrane is provided in the filter assembly 8, which can filter oxygen molecules in the air and add nitrogen into the packaging bag. The nitrogen replaces the air in the packaging bag, and can prevent food oxidation when sucking and sealing wet food and soft food.

[0032] In the food vacuum sealer of the present embodiment, the vacuum sensor 7 is used to detect the vacuum degree in the vacuum chamber 4. The vacuum sensor 7 is arranged on the control board 6. The control board 6 is provided with a control chip. The control chip sends a signal to drive the vacuum pump 5 to run, and receives a signal from the vacuum sensor 7 to stop the vacuum pump 5.

[0033] like Figure 4-7 As shown, the circuit schematic diagram of the food vacuum sealer includes a power supply circuit, a control chip, a vacuum pump drive circuit, a heating and sealing circuit and a button indication circuit; the power supply circuit converts the AC mains into a DC voltage output to provide power for other modules. In this embodiment, the power supply circuit performs a secondary voltage conversion. During the primary voltage conversion, the power supply circuit inputs the current to the transformer T1 after half-bridge rectification and LC filtering, and controls the stable output DC voltage through the constant voltage and constant current control chip U3. In this embodiment, the transformer T1 model is EE1310, and the constant voltage and constant current control chip U3 model is KP1505X; during the secondary voltage conversion, the 12V voltage is converted into other voltages through the voltage regulator chip U2. In this embodiment, the voltage regulator chip U2 model is 78L05.

[0034] like Figure 5 As shown, each pin of the control chip is connected to each circuit respectively. The control chip receives key signals and vacuum sensor signals, and outputs signals to control the vacuum pump to operate to suck air and heat and seal.

[0035] like Figure 6 As shown, the vacuum pump driving circuit uses a transistor to control the start and stop of the vacuum pump, and the on and off of the transistor is used to control the on and off of the vacuum pump power supply; specifically, the vacuum pump uses a 12V DC vacuum pump, the positive terminal of the vacuum is connected to the positive terminal of the power supply, and the negative terminal of the vacuum pump is connected to the transistor Q3. In this embodiment, the transistor uses a MOSFET tube with a model of 3400 / A09T. The collector of the transistor Q3 is connected to the inductor L2 and then to the negative terminal of the vacuum pump. The emitter of the transistor Q3 is connected to the circuit grounding point, and the base of the transistor Q3 is connected to the resistor R12 and then to the control chip. The control chip outputs a signal to control the transistor Q3 to be turned on or off. The resistor R13 is connected between the base and the emitter of the transistor Q3. To prevent induced current, a diode D1 is connected in parallel to the positive terminal and the negative terminal of the vacuum pump, and a capacitor C5 is connected in parallel for filtering. The positive input and the negative output of the vacuum pump are connected in series with the inductors L1 and L2 respectively, and the control chip outputs a signal to control the start or stop of the vacuum pump.

[0036] like Figure 7 As shown, the heating and sealing circuit is connected to the heating wire for the heating and sealing mechanism to heat and seal the bag mouth. The heating and sealing circuit includes a bidirectional thyristor Q1 and a transistor Q2. The bidirectional thyristor Q1 is connected to the heating wire to control the heating by turning the bidirectional thyristor Q1 on and off. The control electrodes T1 and T2 of the bidirectional thyristor Q1 are connected to the grounding point of the connection circuit from the negative end of the heating wire. The G electrode of the bidirectional thyristor Q1 is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is connected to the grounding point of the circuit, and the base of the transistor Q2 is connected to the control chip. The control chip outputs a signal to turn on the transistor Q2, so that the signal acts on the G electrode of the bidirectional thyristor Q1 to turn on the bidirectional thyristor Q1, thereby controlling the heating wire to heat.

[0037] The food vacuum sealer in this embodiment has multiple vacuum suction modes, including wet suction mode (Moist), dry suction mode (Normal), soft suction mode (Soft), spot suction mode (Seal), etc. By pressing the button of the corresponding mode, the control chip receives the signal to start the corresponding mode. Various suction working modes are realized through the cooperation of the control chip, vacuum sensor, and filter component. The program for stopping the vacuum pump at different vacuum degrees is written in the control chip. The program is triggered by inputting signals to the input pins of the control chip through buttons, and the vacuum pump is stopped after the vacuum degree in the vacuum chamber reaches the set value.

[0038] In the wet extraction mode (Moist), the vacuum pump sucks air while the outside air is replenished into the vacuum chamber through the filter component. Because the food contains moisture, the vacuum degree value for stopping the vacuum pump should not be too high. You can set an appropriate vacuum degree value in the control chip. If it is too high, the food will be deeply squeezed to squeeze the moisture into the vacuum chamber. After the vacuum degree is set, the vacuum pump will stop, so that the packaging bag will be slowly vacuum compressed and sealed. The sealed packaging bag is moderately soft and hard. In the dry extraction mode (Normal), the vacuum degree value set in the control chip is relatively large, and the vacuum pump quickly sucks air to the set vacuum degree and then stops, and the vacuum is sealed. The set vacuum degree value is larger, and the sealed packaging bag is harder; in the soft extraction mode (Soft), soft foods such as cakes and biscuits are sealed. The vacuum degree value is set lower in the control chip. When the set vacuum degree is reached, the vacuum pump is stopped to slowly vacuum compress and seal the packaging bag. The packaging bag is not extracted too much after sealing, and the packaging bag is soft, which preserves the softness of the food, unlike ordinary food vacuum sealers that completely suck out the air to compress the food and harden it, losing the taste of the food; in the point extraction mode (Seal), the button directly inputs the signal to the control chip to control the start of the vacuum pump, and the user manually controls the vacuum degree of the extracted packaging bag.

[0039] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A food vacuum sealer, comprising a vacuum sealer body, wherein the vacuum sealer body is divided into an upper shell (1) and a lower shell (2), wherein vacuum grooves (3) are respectively provided on the surfaces of the upper shell (1) and the lower shell (2), wherein the vacuum grooves (3) are closed to form a vacuum chamber (4), wherein: The vacuum sealing machine body is provided with a vacuum pump (5), a control panel (6) and a filter assembly (8); the vacuum chamber (4) is provided with at least two ventilation interfaces, including a first ventilation interface (9) and a second ventilation interface (10); the two ventilation interfaces are arranged remotely from each other, the first ventilation interface (9) is connected to the vacuum pump (5), and the second ventilation interface (10) is connected to the filter assembly (8); the control panel (6) is provided with a control chip and a vacuum sensor (7); the control chip receives a signal from the vacuum sensor (7) to control the amount of air sucked by the vacuum pump (5).

2. A food vacuum sealer according to claim 1, characterized in that: The vacuum sensor (7) is connected to the second ventilation interface (10), and the vacuum sensor (7) detects the vacuum degree in the vacuum chamber (4).

3. A food vacuum sealer according to claim 1, characterized in that: The vacuum chamber (4) is provided with a third ventilation interface (11), the third ventilation interface (11) is adjacent to the second ventilation interface (10), and the vacuum sensor (7) is connected to the third ventilation interface (11).

4. A food vacuum sealer according to claim 1, characterized in that: The filter assembly (8) is connected to the outside air and the vacuum chamber (4) respectively, and the filter assembly (8) filters the air.

5. The food vacuum sealer according to claim 1, characterized in that: The upper shell (1) is provided with locking buttons (12) on both sides respectively, and the lower shell (2) is provided with a locking groove (13) correspondingly, and the locking buttons (12) and the locking groove (13) lock the upper shell (1) and the lower shell (2).

6. A food vacuum sealer according to claim 5, characterized in that: The upper shell (1) is provided with a heating and sealing mechanism.

7. A food vacuum sealer according to claim 1, characterized in that: The control board (6) is provided with a power supply circuit, a vacuum pump driving circuit, and a heating and sealing circuit. The control chip is respectively connected to the vacuum pump driving circuit and the heating and sealing circuit by signals. The control chip outputs signals to control the vacuum pump driving circuit and the heating and sealing circuit.

8. A food vacuum sealer according to claim 7, characterized in that: The vacuum pump driving circuit includes a transistor Q3, inductors L1 and L2, the collector of the transistor Q3 is connected to the negative electrode of the vacuum pump, the base of the transistor Q3 is connected to the control chip, the transistor Q3 receives the output signal of the control chip to be turned on or off, and the inductors L1 and L2 are respectively connected to the positive input and negative output of the vacuum pump.

9. A food vacuum sealer according to claim 7, characterized in that: The heating and sealing circuit comprises a bidirectional thyristor Q1 and a transistor Q2, wherein the G pole of the bidirectional thyristor Q1 is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is connected to the circuit grounding point, and the base of the transistor Q2 is connected to the control chip.

10. A food vacuum sealer according to any one of claims 1 to 9, characterized in that: The vacuum sealer has five functions: wet extraction mode, dry extraction mode, soft extraction mode, spot extraction mode, and stop.

Images