KR100816067B1 - Vacuum sealer equipped with vacuum release means using solenoid valve - Google Patents

Abstract

The present invention relates to a vacuum packaging machine for vacuum-sealing a heat-bonding vacuum packaging bag in which an article is stored, and then heating and sealing the inlet. Particularly, the present invention relates to a vacuum space after the thermal bonding between the vacuum exhaust and the inlet inside the vacuum packaging bag. A vacuum release means for releasing the vacuum state by introducing outside air into a solenoid valve enables automated vacuum release, and the vacuum space forming member is configured to be detachable. It is further provided with a one-touch locking means to be released, and also with a support means for supporting a vacuum bag containing the product, so that it is possible to smoothly vacuum work even in a small space, and furthermore, by a vacuum pump through a silencer A vacuum packaging machine is provided to reduce exhaust noise.

Vacuum packaging device having a vacuum release means according to the present invention; An upper body arranged in a pivotable form with respect to the lower body; A heater installed at the lower body or the upper body, or both, to heat-bond the vacuum packaging bag; A vacuum space forming member which is arranged on the lower body or the upper body, or both, to block the inlet of the vacuum packaging bag which is evacuated from the outside to form a vacuum space; A vacuum pump connected through a conduit and an exhaust hole communicating with the vacuum space formed by the vacuum space forming member; A vacuum release means including a solenoid valve provided on a conduit connecting the exhaust hole and the vacuum pump arranged in the vacuum space, and an outside air inflow portion communicating with the outside air into the vacuum space through the solenoid valve; And a controller for connecting the vacuum pump and the exhaust hole to the solenoid valve of the vacuum release means or connecting the outside air inlet and the exhaust hole according to an input signal.

Vacuum, packaging, heater, vacuum release means, solenoid valve, locking means, one-touch, support means, packaging bag, sealing member, silencer

Description

Vacuum packaging machine with vacuum release means using solenoid valves {VACUUM SEALER EQUIPPED WITH VACUUM RELEASE MEANS USING SOLENOID VALVE}

Figure 1a is a perspective view showing a state in which the upper body and the lower body engaged in the vacuum packaging machine according to the present invention,

Figure 1b and Figure 1c is a perspective view showing a state where the upper body and the lower body in the vacuum packaging machine according to the present invention, respectively,

Figure 1d is a front view showing a vacuum space forming member of the vacuum packaging machine according to the present invention,

Figure 1e is a partial plan view showing the lower body receiving portion of the vacuum packaging machine according to the present invention,

Figure 2a is an exploded perspective view of the one-touch type locking means,

Figure 2b is an exploded perspective view of a one-touch type locking means different from that of Figure 2a,

3a and 3b is a perspective view showing a storage article support means of different forms,

Figure 4a is a schematic bottom view inside the support of the vacuum packaging machine according to the invention,

Figure 4b is a schematic internal bottom view of the support of the vacuum packaging machine according to the invention different from Figure 4a,

4c is a perspective view of a muffler,

4d is a perspective view of a cross and T-shaped connector for conduit,

4E is a conceptual diagram of a solenoid valve forming a vacuum release means.

<Description of the symbols for the main parts of the drawings>

V: vacuum packaging machine H: pivot

B: Vacuum bag P: Stored goods

C, C ': vacuum channel R: vacuum space

10: lower body 20: upper body

30: heater 31: pressure member

40: vacuum pump 50: vacuum space forming member

51A: Exhaust hole 51B: Fitting

53A: corresponding fixing part 53B: detachable part

55: sealing member 56: corresponding sealing member

60,160: support means 61,63,161,163: powder

70: one-touch type locking means 70A: lock

70B: Engaging protrusion 71: Hook member

72: guide lever 73: spring

74: case 74a: locking guide rail

74b: unlocking guide slit 74c: stopper hole

75: shell member 75a: insertion hole

A: Adapter F: Vacuum release means

LC, LT: End Connection S: Silencer

SV: Solenoid Valve PS: Pressure Sensor

The present invention relates to a vacuum packaging machine for sealing and sealing the inlet by vacuum exhausting the heat-bonding vacuum packaging bag in which the article is stored,

Particularly, the present invention is capable of automated vacuum release by configuring a solenoid valve as a vacuum release means for releasing the vacuum state by introducing external air into the vacuum space after thermal bonding of the vacuum exhaust inside the vacuum bag and the inlet.

The vacuum space forming member is configured to be removable,

Pressing once more, it is further provided with a one-touch type locking means to release the locking projections by pressing the locking projections again,

In addition, it is equipped with a supporting means to support the vacuum packaging bag containing the goods, it is possible to smooth vacuum packaging work in a narrow space,

Furthermore, the present invention relates to a vacuum packaging machine capable of reducing exhaust noise caused by a vacuum pump through a silencer.

Vacuum packing machines for storing food items such as foods or cooked foods in vacuum packaging bags to increase the shelf life by preventing the decay of the goods by vacuum packaging the packaging bags are widely used in specialty restaurants or food stores,

 In addition, with the recent trend of nuclear family and the trend of shopping at weekends in large discount stores and storing more than a week of food in the refrigerator, small vacuum packaging machines for home use are in the spotlight.

In the vacuum packaging machine mainly composed of the upper body which is hinged and the lower body arranged the heavy parts such as the heater and the vacuum pump in the vacuum packaging bag located in the vacuum space formed by the sealing member when the lower body and the upper body is engaged. The technique related to the vacuum release means for introducing the outside air into the vacuum space in order to easily separate the vacuum packaging bag from the packaging machine after the thermal bonding of the vacuum exhaust and the inlet

Patent Registration No. 0558520 (2005.12.16) by the applicant of the present invention `` Vacuum Packing Machine with Vacuum Release Means '',

Patent registration No.0500961 (2005.07.04) by the applicant of the present invention, there is a vacuum packaging machine capable of simultaneously performing the locking function and the vacuum release operation,

The vacuum release means proposed in the registered patent is a manual vacuum packaging machine can be improved through automation in terms of user convenience.

In addition, in consideration of the use situation in which the vacuum space forming member is arranged in the lower body, and the separation and washing is repeated when the liquid such as the juice leaked from the vacuum packaging bag is accumulated in the vacuum channel.

Patent Application Publication No. 2005-0107107 by the applicant of the present invention (Nov. 11, 2005) Publication of a vacuum packaging machine having a partially open vacuum channel The removable vacuum space forming member described in connection with Figure 4 has been presented.

However, the separate vacuum space forming member of the conventional vacuum packaging machine, including Patent Publication No. 2005-0107107, does not have directionality in detachment.

Because of this, if the liquid or foreign matter such as the juice flowing out of the vacuum packaging bag accumulates in the channel, the vacuum space forming member has to be repeatedly attached and detached for cleaning.

As a result, there is an inevitable occurrence of leakage on the exhaust passage connected to the vacuum pump due to play in the coupling part.

As a result, the durability of the product was bound to fall.

For reference, when the vacuum space forming member in the conventionally known vacuum packaging machine is "both side detachable", it can be referred to as "one side detachable" vacuum space forming member according to the present invention.

Furthermore, when the vacuum bag is sealed in the vacuum packaging machine, a technique for allowing the lower body and the upper body to firmly engage the vacuum space formed by the loop-type sealing member without the user pressing the vacuum space.

The above patent registration No.0500961 by the applicant of the present invention,

Utility model registration of Ahn Jun-young No.0405381 (2006.01.02) 『Heating and vacuum packaging machine』

All of these are to maintain the engaging state of the lower body and the upper body through the hook-type locking means,

To release the hook, press the button on the side of the lower body.

Therefore, the hook and the clasp is stiff in the early stage of the use of the vacuum packaging machine is difficult to use, especially for female users, there is a risk that the problem of wear or breakage of the hook and clasp after long-term use.

In addition, the conventional vacuum packaging machine is mainly placed on the kitchen table or the kitchen sink, but when the location is narrow, there is a problem that can not support the items contained in the vacuum packaging bag may not be smooth vacuum packaging.

Accordingly, an object of the present invention is to provide a vacuum packaging machine having a vacuum release means configured by using a solenoid valve to release the vacuum state by introducing the outside air into the vacuum space after the thermal bonding of the vacuum exhaust and the inlet inside the vacuum packaging bag. do.

In another aspect, the present invention is a vacuum channel for forming a vacuum space in which the inlet of the packaging bag to be stored is formed as a separate member to implement a detachable form, but in the lower body and / or the upper body for the vacuum space forming member The receiving portion and the detachable method of the vacuum space forming member are formed by a pair of fixing portions and detachable portions which are male and female coupled to each other, so that each of the fixing portions is first coupled when attached, and each detachable portion is detached first when detached. It is an object of the present invention to provide a vacuum packaging machine without a leakage problem on the exhaust passage leading to the vacuum pump even after long use by implementing a detachable type vacuum space forming member.

Furthermore, by adopting the one-touch type locking means, press once to catch the locking projection and press again to release the locking projection so that the formation and release of the vacuum space formed by the sealing member is cut off from the outside by the upper body and the lower body. An object of the present invention is to provide a vacuum packaging machine.

In addition, an object of the present invention is to provide a vacuum packaging machine incorporating a support means for the article in front of the lower body hinged to the upper body,

In addition, an object of the present invention is to provide a vacuum packaging machine that introduces a silencer and prevents noise from being generated due to exhaust by the vacuum pump operation.

In order to achieve the above object, a vacuum packaging machine having a vacuum release means according to the present invention

Lower body;

An upper body arranged in a pivotable form with respect to the lower body;

A heater installed at the lower body or the upper body, or both, to heat-bond the vacuum packaging bag;

A vacuum space forming member which is arranged on the lower body or the upper body, or both, to block the inlet of the vacuum packaging bag which is evacuated from the outside to form a vacuum space;

A vacuum pump connected through a conduit and an exhaust hole communicating with the vacuum space formed by the vacuum space forming member;

A vacuum release means including a solenoid valve provided on a conduit connecting the exhaust hole and the vacuum pump arranged in the vacuum space, and an outside air inflow portion communicating with the outside air into the vacuum space through the solenoid valve; And

The solenoid valve of the vacuum release means comprises a control unit for connecting the vacuum pump and the exhaust hole in accordance with an input signal, or to connect the outside air inlet and the exhaust hole.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the tens, ones and alphabets, refer to members having the same function, and unless otherwise specified, each reference is referred to. What is necessary is just to consider the member which conforms to these standards.

In describing the vacuum packaging machine (V) according to the present invention, if the direction reference is specified with reference to FIGS. 1A and 1B,

When used along the direction of gravity, the lower side of the member 10, which is located at the lower side and mainly arranged the main parts such as the heater 30 and the pump 40 (see FIG. 4A), is designated as the lower side, and the member is referred to as the 'lower body'. And

The other side is defined as the upper side, and the member formed through the lower body 10 and the pivot axis (H) is referred to as the 'upper body' (20).

In addition, the pivot shaft (H) side of the lower body 10 and the upper body 20 is set to the rear,

The upper and lower vacuum channels (C ') (C) which are located on the opposite side of the pivot shaft (H) to form the vacuum space (R) when the upper body and the lower body are engaged are determined to the front.

First, in Figure 1a, Figure 1b and Figure 1c, the vacuum packaging machine (V) according to the present invention is the lower body 10, the main parts such as a vacuum pump is built in, and the lower body 10 and pivoting in the longitudinal direction An upper body 20 coupled to the shaft H and relatively lighter than the lower body 10 is included.

The vacuum packaging machine of the present invention and the known vacuum packaging machine is shown in the form of the upper body 20 is pivoted about the rear longitudinal direction of the lower body 10,

In some cases, as described in the Patent Registration No. 0582176 (2006.05.15) by the applicant of the present invention `` a vacuum packaging machine having a side hinge and a multiple sealing method of the vacuum packaging bag using the same '', the side end of the lower body ( Iii) the upper body is pivoted about the direction,

The present invention can be applied irrespective of the pivot axis arrangement position of the upper body and the lower body.

Next, as shown in FIGS. 1B and 3A, a heater 30 for heating and joining the inlet of the vacuum packaging bag B containing the storage article P is arranged in the lower body 10, and the vacuum packaging bag The pressing member 31 may be arranged at a corresponding position of the upper body 20 so that the inlet portion may be engaged with the heater 30 so as to more reliably contact the heater 30. If necessary, the arrangement positions of the heater and the pressing member may be reversed.

Subsequently, when the lower body 10 and the upper body 20 rotate about the pivot axis H and are engaged with each other, a vacuum space R is formed by blocking an inlet of the vacuum packaging bag B, which is evacuated, from the outside. The vacuum channel (C) (C ') is preferably provided,

In the drawing, the vacuum channels C and C 'arranged in the lower body 10 and the upper body 20 are all surrounded by a continuous loop-type sealing member 55 and 56, which The sealing members are arranged in mounting grooves (not shown), respectively.

In some cases, it is possible to employ a linear sealing member, as in Patent Registration No. 0464661 (2004.12.22) "Vacuum Packing Machine with a Linear Sealing Member" by the applicant of the present invention.

1b, 1c, 1d, and 1e, the receiving part 11 of the lower body 10 has a "one side detachable" vacuum space (R) as a core in the vacuum packaging machine (V) of the present invention. ) Forming member 50 is provided,

An inclined portion C1 is formed in the vacuum channel C provided in the lower body 10 as compared to the vacuum channel C ′ of the upper body 20.

(It is not necessary that both the upper and lower vacuum channels are provided.)

In particular, the direction in which the inclined portion C1 (see FIG. 1D) is formed is connected to the vacuum pump 40 so as to generate a vacuum pressure in the vacuum space R.

It is inclined gradually in the direction away from the exhaust hole 51A arranged at a position biased to one of the vacuum space forming members (left in the drawing), so that liquid or foreign matter such as juice is not sucked toward the pump 40 as much as possible. Liquids or foreign substances are to be accumulated.

In addition, in FIGS. 1C and 1D, the exhaust hole 51A is formed in the nozzle 51a which protrudes substantially, and the nozzle 51a has a cutout portion 51b so that the nozzle ( 51a) is to prevent the top of the blockage

A partition wall 51p is formed on the right side of the nozzle 51a so as to prevent liquid or foreign matter from flowing over into the exhaust hole 51A once again and preventing it from entering (in the upper circle enlarged state of FIG. 1C). Reference).

1C, 1D, and 1E, the receiving portion 11 formed in the lower body 10 for the vacuum space forming member 50 is surrounded by an intermediate hole 11a (intermediate hole) ( 11A) is formed,

On the lower surface of the exhaust hole 51A of the forming member 50, a slightly protruding insert 51c is surrounded by the sealing ring 51d (lower in Fig. 1d, inverted lower cylinder accuracy). Status),

When the vacuum space forming member 50 is coupled to the receiving portion 11,

Since the insertion portion 51c is inserted into the intermediate hole 11A, and the sealing ring 51d is mounted on and closely adhered to the circular jaw portion 11a (see an enlarged state in the upper circle of FIG. 1C).

As a result, since the exhaust hole 51A portion is in close contact with the intermediate hole 11A, air leakage can be reliably prevented.

However, the vacuum space forming member 50 shown by those skilled in the art may be variously modified.

For example, the exhaust hole connected to the vacuum pump 40 may be arranged in the vacuum channel (C ') of the upper body, at this time, the risk that liquid or foreign matter flows into the pump 40 can be reduced by that,

In this case, the vacuum space forming member simply serves to accumulate the liquid or foreign matter leaking out of the storage article (P) of the vacuum packaging bag (B).

On the other hand, the nozzle 51a constituting the exhaust hole 51A is a vacuum exhaust of the external vacuum storage container by using the connector presented in Patent Registration No. 0549682 (Universal Vacuum Auxiliary Connector) by the applicant of the present invention. Can be used for

At this time is pressed by the pressing protrusion 21 of the upper body 20

[Operation of pump 40-operation of heater 30-operation of solenoid valve (SV) forming vacuum release means] by control of the microprocessor of the embedded printed circuit board (CB) (see FIG. 4A) constituting the control unit. Leading up

Of the operation buttons 40A and 40B that are the starting point for a series of vacuum packer (V) automatic operations

When pressing the right operation button 40A with the right hand and connecting one end of the connector to the nozzle 51a in advance and the other end of the connector to connect the vacuum storage container

Vacuum evacuation of the outer container can be performed.

Next, in FIGS. 1B to 1E, the concept of the fixing part 53A and the detachable part 53B, which are the most important elements in the one side detachable vacuum space forming member 50, will be described.

The concept of the fixing portion and the detachable portion of the forming member is one side (left side in the drawing) fixed portion 13A and the other side (right side in the drawing) formed in the receiving portion 11 of the lower body 10 ) Is a component corresponding to the detachable part 13B,

Each fixing part 13A, 53A is formed on the left side as mentioned above

If the vacuum space (R) forming member 50 is arranged in the lower body 10 and the liquid or foreign matter such as juice leaked out of the vacuum packaging bag (B) is accumulated in the vacuum channel (C) and then washed separately Given the use situation where the remounting process is repeated

Connection and separation with the vacuum pump which generates vacuum pressure in the vacuum space by the separation method only by the operation of the detachable part on the right side,

More specifically, the connection and separation with the intermediate hole 11A which is connected through the vacuum pump 40 and the conduit and arranged in the receiving portion 11 is performed.

The adhesiveness must be surely ensured in the exhaust hole 51A portion of the vacuum panel forming member 50, in particular the insertion portion 51c, which must be repeated.

Since the exhaust hole 51A and the intermediate hole 11A are biased on the left side, the fixing parts 13A and 53A are also biased on the left side.

The shape and structure of the fixing portion 13A and the detachable portion 13B formed on both sides of the lower body accommodating portion 11 are almost the same,

The shape and structure of the corresponding fixing part 53A and the corresponding detachable part 53B of the vacuum space forming member 50 are the same,

This is for convenience of manufacture and is not essential.

First, the corresponding fixing part 53A and the corresponding detachable part 53B of the vacuum panel forming member 50 can be seen in FIGS. 1C and 1D, respectively.

Connection parts (53a ') (53b') arranged on both sides of the lower side of the forming member 50 to give elasticity by material properties, in particular synthetic resin material properties,

Hanging jaw (53a) (53b) for preventing the vacuum space forming member 50 is separated after being mounted to the receiving portion 11, and

Each of the fixing part and the detachable part is used to move left and right from the connecting parts 53a 'and 53b', and is composed of grip parts 53a "and 53b" bent to the left and right, respectively.

Next, the fixing portion 13A and the detachable portion 13B of the lower body 10 accommodating portion 11 are as shown in FIGS. 1C and 1E, respectively.

Entry portions 13a and 13b having a large open area to which the catching jaws 53a and 53b of the corresponding portions 53A and 53B can be separated to the upper portion,

The locking portion 53a, 53b of the corresponding portion 53A, 53B cannot be separated to the upper portion due to the narrow opening area, and only the holding portion 53a ", 53b" can protrude through and protrude. (13a ') (13b'),

In particular, as can be seen in the lower circle accuracy of FIG. 1e (a little exaggerated for ease of understanding in the drawing)

The length of the entry portion 13b of the detachable portion 13B is longer than the length of the entry portion 13a of the fixed portion 13A,

The length of the detachable portion 13B and the engaging portion 13b 'is shorter than that of the locking portion 13a' of the fixing portion 13A.

This is a main difference between the fixing portion 13A and the detachable portion 13B of the accommodation portion 11.

Due to this, the elasticity of the connection portion 53a 'of the fixing portion 53A at the corresponding portion of the vacuum space forming member 50 coupled to the portion 13a of the fixing portion 13A is such that it is meaningless to be exerted. Short

The length of the entry portion 13b of the detachable portion 13B is sufficiently long so that the elasticity of the connecting portion 53b 'of the corresponding detachable portion 53B is exerted.

Pushing the gripping portion 53b "to the left position the locking jaw 53b, which is located in the engaging portion 13b 'section of the detachable portion 13B, at the entrance portion 13b of the detachable portion 13B. Is possible

In a state where a finger is placed under the grip portion 53b "of the corresponding detachable portion 53B of the vacuum space forming member 50 and continuously pressed to the left side.

When you apply force to the top

The latching jaw 53b of the corresponding detachable portion 53B exits upward through the entry portion 13b.

As a result, the right side of the vacuum space forming member 50 can be lifted to the upper surface.

Therefore, in the corresponding portion of the vacuum space forming member 50, the connecting portion 53a 'of the fixing portion 53A is basically elastic but meaningless,

The shape of the fixing portion 13A and the corresponding fixing portion 53A of the lower body accommodating portion 11 is simply sufficient as long as it is simply a form of a protrusion and a groove that can be male and female,

The corresponding detachable portion 53B of the vacuum space forming member 50 is shaped to be supported by elastic means (in the drawing, the connecting portion 53b 'functions as an elastic means).

The engaging jaw 53b of the detachable part 53b is located at the engaging part 13b 'of the detachable part 13B of the accommodating part 11 in an engaged state without applying external force.

When the external force is applied, the locking jaw 53b is moved to be positioned at the entrance portion 13b of the receiving portion 11 and the detachable portion 13B.

If you expand and generalize these concepts,

The concept of the fixing part and the corresponding fixing part

It is simply a male and female form and in a state in which the vacuum space forming member is coupled to the lower body accommodating portion, it is impossible to separate and separate the forming member to the upper side even when an external force is applied from the fixing portion.

The concept of the detachable portion and the corresponding detachable portion

Wherever the forming member and the lower body receiving portion is arranged is provided with a locking projection that can be locked and opened by the elastic means, the locking groove to which the locking projection is coupled is also arranged in the corresponding member corresponding position it means.

As described above, when employing the "one side detachable" vacuum space forming member according to the present invention

Patent Publication No. 2005-0107107 by the Applicant of the present invention (Nov. 11, 2005) Publication of `` Vacuum Packer with Partially Open Vacuum Channel '' A conventional "both side detachable" vacuum space forming member as described in connection with FIG. Compared to

An exhaust hole 51A of the vacuum panel forming member 50 which is connected through the vacuum pump 40 and the conduit and is repeatedly connected and disconnected with the intermediate hole 11A arranged in the accommodating portion 11. The adhesion of the part is ensured well

Even after long use, it is possible to implement a vacuum packer without a leakage problem on the exhaust passage leading to the vacuum pump.

In addition, in the drawing, the receiving portion 11 and the vacuum space forming member 50 are preferably provided with guide means for guiding to be coupled to the correct position and to prevent shaking, the guide means shown

A plurality of fitting grooves (11B) formed in the flange of the receiving portion 11,

It is a fitting protrusion (51B) formed on the lower edge of the vacuum space forming member 50,

The grooves 11B and the fitting protrusions 51B have an alphabet "T" shape.

While ensuring the prevention of front, rear, left, and right swinging of the combined vacuum space forming member

The fitting protrusion 51B can be used to enhance the durability of the fitting protrusion 51B.

Subsequently, by the mutual relationship between the receiving portion 11 and the vacuum space forming member 50

It is preferable that the front surface of the vacuum space R forming member 50 is higher than the upper surface of the lower body 10 to form a projection PJ (see FIG. 1B).

This is because when the initial roll-type vacuum bag is cut to the required length, the two overlapping sheets are sealed at both sides and open at the front and rear ends.

One end must be thermally bonded to make an envelope that can hold the stored items.

When one end of the cut sheet is put into the vacuum packaging machine (V) to properly position the heater 30

Due to the stepped portion PJ, an operation of allowing one end of the sheet to be accurately arranged on the heater 30 may be easily performed.

Subsequently, the intermediate hole 11A of the lower body 10, which is in close contact with the exhaust hole 51A of the vacuum space R forming member 50, can be seen in FIG. 4A.

The nozzle 41a is formed at the bottom thereof, and is connected to the vacuum pump 40 through the conduit T1, so that the exhaust air in the vacuum space R can be exhausted through the suction hole during the pump operation.

The vacuum inside the vacuum packaging bag B in which the inlet is located in the vacuum space is made.

In addition, the vacuum packaging bag (B) is placed in the middle of the vacuum channel (C) (C '), more precisely in the vacuum space (R).

When the lower body 10 and the upper body 20 are engaged, the operation buttons 40A and 40B are pressed by the pressing protrusion 21 automatically.

(Or not shown, but the user manually press the operation button,

Alternatively automatically (not shown) by sensing the applied pressure of the upper body)

When the vacuum pump 40 is operated, a vacuum pressure is applied to the vacuum space R through the exhaust hole 51A connected to the pump.

If necessary, two or more exhaust holes may be provided, and a member such as a conduit for connecting the exhaust hole and the pump should also be appropriately introduced.

Next, the storage means (P) which is one of the cores of the vacuum packaging machine (V) according to the present invention, more specifically, the support means for supporting the article (P) stored in the packaging bag (B) can be implemented in various forms,

For example, it may be configured to be fixed or detachable protruding in front of the lower body (10).

However, the support means can be stored and drawn out in a form overlapping with the lower body in order to enhance the convenience by making the support area for the goods as wide as possible while making it easier to transport and storage by more compact configuration It is preferable to implement.

Storage and withdrawal support means can be implemented in a variety of forms, such as folding and unfolding around the pivot shaft, such as drawers, folding, or fan,

Furthermore, in order to provide a longer support means while being stored in the front and rear widths of the same lower body 10, it is more preferable that the support means have a multi-stage structure composed of a plurality of powders.

3A and 3B show a fully drawable and partially drawer partially foldable multistage (two shown) support means 60, 160, respectively.

First, the support means 60 illustrated in FIG. 3A has a shape in which the first powder 61 is received and drawn out from the left and right ends of the first and second ends of the housing 13 of the lower surface of the vacuum packaging machine 10. The first powder 61 is also provided with an accommodating portion 61a having a rail groove so that the second powder 63 can be accommodated.

A stopper (not shown) to prevent the powders from being pulled out at the rear end of each of the powders 61 and 63, the accommodating portion 13 of the lower body 10, and the accommodating portion 61a of the first powder. It is preferred that the

In a state in which the first powder is accommodated in the accommodating part of the lower body and the second powder is in the accommodating part of the first powder, a locking member is arranged to prevent the first powder and the second powder from being pulled out even under moderate impact. It is also desirable, however, that it should be easily withdrawn when the user grasps it by hand and pulls out each powder.

Next, the support means 160 shown in FIG. 3B is also a first powder 161 is received in a drawer type in the rail groove of the receiving portion 13 of the lower body 10 of the vacuum packaging machine V,

The second powder 163 is coupled to the pivot shaft groove (not shown) formed at the front end of the first powder 161 through the pivot shaft pin portion (not shown), so that the second powder 163 can be folded and unfolded in a foldable manner. The drawer part is folding type,

The front surface of the first powder 161 is formed with a receiving groove 161a corresponding to the shape of the second powder so as to form the same plane as the upper surface of the first powder possible when the second powder 163 is folded.

In the support means 160 shown in Figure 3b is also preferably provided with a suitable stopper and locking member to prevent the lower body and powder from being separated from each other,

In particular, in the unfolded state, the rear end of the second powder 163 and the front end of the first powder 161 are preferably overlapped to some extent so that the unfolded second powder is arranged on the same straight line as the first powder possible without being bent downward. Do.

The shape of the support means as described above may be variously modified, and the multi-stage structure may also be implemented in various ways.

Next, as shown in FIGS. 1B and 2A, the one-touch type locking means 70 constituting the core of the present invention is disclosed in Korean Patent Laid-Open Publication No. 1989-0006128 (1989.05.18), "Push Latch Device" and Utility Model Registration No. 0106852. No. (1997.07.09) The basic concept is the same as that mentioned in the prior art of the door lock, but it reflects the improvement related to the operation reliability.

The locking means 70 is composed of a locking mechanism (70A) arranged in the lower body 10 and the locking projection (70B) provided in the upper body 20, the locking position and the arrangement position of the locking projection It can be mutually modified.

Since the sealing members 55 and 56 around the vacuum channels C and C 'are elastic materials to some extent, such as a foamed polyurethane material, they may be pressurized and contracted.

In the state in which the lower body 10 and the upper body 20 are engaged

When the hook member 71 of the locking mechanism 70A and the end locking portion 70B 'of the locking protrusion 70B are coupled to each other,

The sealing members 55 and 56 are pressurized and contracted to be firmly engaged so that the vacuum space R is surely blocked from the outside.

Looking at the operation process in detail

First, the hook member 71 of the locking mechanism 70A and the end locking portion 70B 'of the locking protrusion 70B are coupled to each other.

In a state in which the lower body 10 and the upper body 20 are engaged, that is, the sealing members 55 and 56 are engaged.

When pressing the upper body 20 toward the lower body 10

As the sealing member (55, 56) capable of pressure shrinkage contracted

The locking portion 70B 'of the locking protrusion 70B held by the elastic hook portion 71a of the hook member 71 can press the hook member 71.

The guide lever 72 located in the insertion hole 71b of the hook member 71 and supported by the contracted spring 73 is lowered as the hook member 71 descends.

The engaging projection 72a of the guide lever 72 is

Ascending out of the stopping hole 74c of the case 74 and riding up the unlocking guide slit 74b,

The hook member 71 can also be raised and the elastic hook portion 71a is opened apart from the restraint of the case 74.

As a result, the locking portion 70B 'of the locking protrusion 70B held by the elastic hook portion 71a is released and the lock is released.

In addition, stoppers (74d) are formed on both sides of the case (74) of the locking mechanism (70A), it is coupled to the engaging piece (not shown) formed in the mounting portion 15 of the lower body 10 by interference fit method To allow a fixed arrangement of the locking mechanism (70A),

In the case 74, the hook member 71 mounted in the form which is supported by the spring 73 is released by the elastic hook portion 71a by biting the locking portion 70B 'of the locking protrusion 70B. ,

The guide lever 72 is pivotally fixed to the insertion hole 71b of the elastic hanger through an insertion protrusion 72b.

When the insertion protrusion 72b is pressed by the upper end of the spring 73, the locking protrusion 72a of the guide lever 72 is due to the unique shape of the insertion protrusion 72b and the hook member insertion hole 71b. 2a stays in a position deviating from the center to the right with respect to the case 74 in FIG.

Due to the positional characteristics of the locking protrusion 72a, the spring 73 is expanded so that the elastic hook portion 71a of the hook member 71 does not come out of the case 74 and does not bite the locking protrusion 70B. In the state

When the upper body 20 is pressed toward the lower body 10, the locking projection (70B) is in contact with the hook member 71 to lower

The stopping protrusion 72a of the guide lever 72 descends on the locking guide rail 74a arranged diagonally on the inner surface of the case 74, and the stopping hole 74c located at the center of the case 74. ), It protrudes and gets out of the restricted state.

The locking protrusion locking portion 70B 'is caught by the elastic hook portion 71a.

The upper body 20 is engaged with the lower body 10 to form a vacuum space R by the sealing members 55 and 56.

In this state, when the upper body is pressed again, the sealing members 55 and 56 are contracted, and when the locking protrusion 70B presses the hook member 71, the guide lever 72 is connected to the stopping hole. 74c) deviate from the state restricted by the upper surface

Again by the spring 73 and the hook member 71 is inserted to the right by the structure of the insertion hole (71b) and the guide lever 72, the insertion projection (72b),

When the force used to press the upper body 20 is removed, the locking projection 72a of the guide lever 72 causes the unlocking guide slit 74b of the case 74 by the elasticity of the spring 73. Ride up

The elastic hook portion 71a of the hook member 71 releases the locking portion 70B 'of the locking protrusion 70B.

In addition, the locking means 70 in Figure 1b and 2a is further provided with an outer shell member 75 for preventing the inflow of foreign matter into the lock (70A),

In the drawing, the outer cover member is shaped to cover the mounting portion 15 of the lower body 10, the insertion hole (75a) of the dumbbell-shape that can be inserted into the locking portion (70B ') of the locking projection (70B) on the upper surface Is formed,

The upper surface of the shell member 75 may be provided with a suitable elasticity by the thin portion (75b) and the rear portion (75c) is repeated

While the insertion hole (75a) of the outer shell member area as small as possible to prevent the entry of foreign matter as much as possible

Even when the outer surface of the engaging projection (70B) and the portion around the insertion hole (75a) of the shell member to maintain the contact state as possible

The locking portion 70B 'of the locking protrusion serves to prevent the upper surface portion of the outer cover member from being caught in the hook member 71.

Such one-touch type locking means can be replaced with a variety of known forms,

For example, FIG. 2B shows a locking mechanism 170A for solving a problem in which the guide lever 72, in particular, the locking projection 72a is weak in the locking mechanism 70A of FIG. 2A.

The lock 170A is also composed of a hook member 171, a guide lever 172, a spring 173, and a case 174.

The guide lever 172 is a bent form of a linear member having an elastic, the lower portion is provided with a latch 172a, the pivot shaft portion 172b is arranged on the upper side,

In the hook member 171, the elastic hook portion 171a is the same as that of FIG. 2A, but the hook portion 171b of the guide shaft 172b of the guide lever 172 is arranged and rotated as the guide lever is deformed. Grooving grooves 171b, which are hangers of the shape, are formed on both sides.

The spring 173 is arranged in the insertion groove 171c biased to the left side of the lower body of the hook member 171,

Inside the case 174 shown in the cut out support protrusion 173a for the spring 173 protrudes in a corresponding position.

The locking-unlocking rail 174a for the guide lever 172 corresponds to the lower surface of the protrusion (unnamed) formed in a wedge shape on the right side of the inner wall of the case 174,

On the right side of the rail 174a, a stopping groove 174c is formed again.

On both sides of the case 174, stoppers 174d are also formed to fix the locking mechanism 170A to the mounting portion of the lower body.

When the hook member 171 is located at the upper side with respect to the case 174 and the hook member contracts and descends the spring 173 in a state where it is not coupled with the engaging protrusion, the elastic hook portion 171a is attached to the case. Redeemed by

The guide lever 172 pivotable through the pivot shaft portion 172b at the hook portion 171b of the hook member 171 is

As the descending wedge-shaped projection of the inner wall of the case is gradually changed to an inclined state while gradually deviating to the left side,

The slope is maximized when it comes to the beginning of the locking-unlocking rail 174a located at the bottom of the protrusion,

Since the rail 174a is inclined, when the latch 172a of the guide lever is further lowered below the rail starting point,

As you turn away from the restraint caused by the wedge-shaped projection and try to stand up again by gravity,

The guide lever 172 is moved to the right side with the pivot shaft portion 172b as an axis, and moves further out to the right by inertia and positioned below the stopper groove 174c.

Instantaneously (because the sealing members 55 and 56 reach a point where it is difficult to contract, this moment can be sensed sensibly)

Removing the force that pressed the hook member 71

As the spring 173 is expanded, the engaging projection 72a of the guide lever 72 is caught by the stopping groove 74c,

The elastic hook portion 171a of the hook member constrained by the case 174 stays in a state where the locking portion of the hook protrusion is fixed.

In this state, when the upper body 20 of the vacuum packaging machine, ie, the hook member 171 is pressed again, the latch 172a of the guide lever 172 is out of the stopping groove 74c and is erected by gravity again. To be positioned below the locking-unlocking rail 174a,

When the force that pressed the hook member is removed, the hook member 171 is raised by the elasticity of the spring 173,

Accordingly, the latch 172a of the guide lever 172 slides along the inclined surface of the rail 174a to be released from the wedge-shaped protrusion, and the hook member is lifted with respect to the case 174 so that the elastic hook portion As the 171a is opened, the locking portion of the locking protrusion is released.

Of course, the skin member shown in FIG. 2A can also be introduced for the locking device of FIG. 2B.

Next, the vacuum release means (F) and the silencer (S) introduced into the vacuum packaging machine (V) according to the present invention will be described with reference to FIGS. 4A to 4C.

First of all, the present invention does not introduce moisture and foreign substances discharged from the contents contained in the packaging bag as in Patent Registration No. 0538520 (2005.12.16) `` Vacuum Packing Machine with Vacuum Release Means '' by the applicant of the present invention. Filter means for preventing the further can be arranged on the conduit connecting the suction pump and the vacuum pump arranged in the vacuum space,

In FIG. 4B, reference numeral A denotes an adapter for mounting such a filter means, and reference numeral A1 denotes an exhaust hole located in the channel C of the lower body 10 when performing a normal vacuum operation without mounting the filter means. Pump with 51A,

More specifically, it is a connection member for directly connecting the bottom nozzle 41a of the intermediate hole 11A arranged in the accommodation portion 11 and the pump 40.

That is, the adapter (A) allows the introduction of a filter for filtering the liquid foreign matter coming out of the storage article contained in the vacuum packaging bag during the vacuum does not enter the pump 40 through the suction hole 41,

If you do not need to use the filter after removing the filter

In order to introduce the connecting member (A1) so that the exhaust hole (51A) is directly connected to the intake nozzle (43a) of the pump 40,

One of the nozzles of the adapter A embedded in the lower body 10 is connected to the first conduit T1 so as to be connected to the exhaust hole 51A above the lower body 10 (substantially in the drawing). The nozzle 41a and the first conduit T1 are connected to the first conduit T1 and the bottom surface of the intermediate hole 11A of the accommodating part 11 in close contact with the exhaust hole 51A. ),

The other one of the nozzles of the adapter is connected to the second conduit T2, and the second conduit is connected to another member such as the pump 40,

In particular, the second conduit is provided with a letter 'T' shaped connector LT, as can be seen in detail in FIG. 4D (B) to simplify piping between T2 and T2 '.

The first branch pipe (L1) of the T-shaped connector (LT) is connected to the second conduit (T2),

The second branch pipe (L2) is connected to the second conduit (T2 '),

The third branch pipe (L3) is connected to the fourth conduit (T4) connected to the pressure sensor (PS) for measuring the pressure of the vacuum space (R),

The ends of each branch pipe (L1) (L2) (L3) have a tapered shape in which the cross section becomes narrower toward the end so that the conduit can be easily combined but there is no problem in airtightness and does not easily fall out. The portion La having the largest cross-sectional area of the apex is larger than the inner diameter of the soft conduit without an external force applied, and since then, it forms a cross-sectional reduction portion Lb with a sharply reduced cross-sectional area, thereby joining the soft conduits. It is expanded in the La portion of the connector (LT), and then squeezed again in the Lb portion is a form in which the airtightness bond strength is satisfied.

Next, as shown in FIGS. 4B and 4C, the silencer S has a connection part S1 connected through the exhaust nozzle 43b of the vacuum pump 40 and the sixth conduit T6.

Narrow portions S2a and S2b of flatly pressed shapes are formed on both sides of the expansion portion S3 bulging in the form of a jar in the middle in a substantially symmetrical form.

One of the narrow parts S2a is connected to the connecting part S1,

The other one S2b is connected to the outlet S4.

4B and 4E, the intake nozzle 43a of the vacuum pump 40 is connected to a solenoid valve SV forming an automatic vacuum release means F, which forms one of the cores of the present invention. (The vacuum release means includes a solenoid valve and an air inlet (IF)),

The solenoid valve SV is a three-way valve, and one of the three connections is connected to the fifth conduit T5 for connection with the intake nozzle 43a of the vacuum pump 40.

The other one of the connecting portion is connected to the second connecting pipe (T2 '),

Through the second connecting pipe (T2 ') of the connector (LT), the second conduit (T2), the adapter (A), the first conduit (T1), the bottom nozzle (41a), and the lower body 10 Connected to the intermediate hole 11A arranged in the channel C and the exhaust hole 51A in turn,

Eventually connected to the vacuum space (R),

The other one of the connecting portion is connected to the third conduit T3 constituting the outside air inlet (IF) forming a part of the vacuum release means (F),

As shown in FIG. 4B, the third conduit is connected to the outside air inlet hole IF1 constituting the outside air inlet part IF.

In addition to being formed in the lower body as shown, the external air inlet hole may be a hole formed in the housing itself forming the solenoid valve.

While the vacuum packaging machine V shown in FIG. 4B has an adapter A for filter introduction,

The vacuum packaging machine (V) shown in Figures 1a and 1b does not have such an adapter (A),

A schematic internal view of the vacuum packaging machine V of FIG. 1A is shown in FIG. 4A.

The difference between the configuration of FIG. 4B and the configuration of FIG. 4A is that there is no adapter A and a connecting member A1 for introduction thereof.

Accordingly, the bottom nozzle 41a communicating with the intermediate hole 11A through the exhaust hole 51A is

Through the conduit (T1) leads to the cross-shaped connector (LC) specifically shown in Figure 4d (A)

Of the four branch pipes of the connector (LC)

The first branch pipe (L1) is connected to the nozzle (41a) through the conduit (T1)

The second branch pipe (L2) is connected to the solenoid valve (SV) for the vacuum release through the inlet air flow through the conduit (T2), the solenoid valve (SV) through the conduit (T3) is the vacuum release means ( Is connected to the inlet hole (IF1) of F),

The third branch pipe (L3) and the fourth conduit (T4) connected to the pressure sensor (PS) for measuring the pressure of the vacuum space (R),

The fourth branch pipe L4 is coupled to the fifth conduit T5 connected to the intake nozzle 43a of the pump 40, respectively.

Referring to the operation of the solenoid valve (SV) constituting the vacuum release means (F) with reference to the vacuum packaging machine shown in Figure 4b,

The solenoid valve is made by a controller, in particular a control board (CB) mounted with a microprocessor chip as shown in the figure,

That is, as shown in FIGS. 1A and 3A, the vacuum packaging bag B in which the storage article P is built is placed on the supporting means 60, and the inlet of the vacuum packaging bag B is vacuumed from the lower body 10. The upper body 20 is lowered in the state of being positioned in the channel C so that the upper body and the lower body are engaged by the one-touch locking means 70 to form a vacuum space R.

The operation buttons 40A and 40B arranged on the upper surface of the lower body 10 are pressed by the pressing protrusion 21 of the upper body 20.

(Or not shown, but the user manually press the operation button,

Alternatively automatically (not shown) by sensing the applied pressure of the upper body)

When an operation signal is applied to the vacuum pump 40

To determine the connection path form of the solenoid valve (SV) through the microprocessor of the control board (CB)

If the solenoid valve is in the form of a path connecting the second conduit T2 'and the fifth conduit T5 as shown in FIG.

As shown in (b) of FIG. 4e, if it is a path form in which the second conduit T2 'and the third conduit T3 are communicated, it is switched to the state of (a).

The air inside the vacuum packaging bag B is operated by the vacuum pump 40 so that the intake nozzle 43a, the fifth conduit T5, the solenoid valve SV, the second conduit T2 ', and the connector ( LT), the second conduit T2, the adapter A, the first conduit T1, the nozzle 41a, the intermediate hole 11A, the exhaust hole 51A, and the vacuum pressure applied to the vacuum space R Exhausted by the exhaust nozzle 43b and the silencer S of the vacuum pump 40,

When the pressure value exceeds the reference value by the pressure sensing of the vacuum space (R),

(Or whether the vacuum pump operation threshold has been exceeded in advance)

Judged by the microprocessor

Stop the operation of the vacuum pump or

(Or while still running)

Operate the heater 30 to heat-bond the inlet of the vacuum packaging bag

Judging whether the standard time is exceeded

(Or by sensing the temperature and comparing it with the reference temperature)

Stop the heater 30

(At this time, if the operation of the vacuum pump continues, stop the pump),

When the stop state of the heater 30 is applied as an input signal

The microprocessor constituting the control unit commands the path change of the solenoid valve SV so that the third conduit T3 and the second conduit T2 'constituting the outside air inlet part IF communicate with each other.

The outside air inlet (IF1), third conduit (T3), solenoid valve (SV), second conduit (T2 '), connector (LT), second conduit (T2), adapter (A), first connection pipe Outside air flows into the vacuum space R through T1 and the exhaust hole 51A to release the vacuum state,

Due to this, the operation of opening the upper body and the lower body can be made easier.

If necessary, the exhaust hole for vacuum evacuation of the vacuum space and the exhaust hole for the vacuum state of the vacuum space may be separately formed instead of the same,

In addition, an emergency switch for turning off the operation of the vacuum pump 40 or the heater 30, or both may be further provided to increase stability.

After a certain time (for example, 10 seconds) after the vacuum is released, the path of the solenoid valve SV is connected to the second conduit T2 'and the fifth conduit T5 to the microprocessor. It is preferred that the value be entered so that it is ready for the next airtight packaging of the next vacuum packaging bag.

In addition, the operation of the solenoid valve SV as described above, that is, the operation of the vacuum releasing means F is exhausted (by the vacuum pump) -thermal bonding (by the heater) when the operation mode of the vacuum packaging machine is configured in various ways. Only in mode,

Thermal bonding mode to ensure that only the vacuum

It is preferable not to make it in the exhaust mode which makes only vacuum exhaust.

The exhaust mode may be selected when the external container is to be vacuumed using an accessory such as "Universal Vacuum Auxiliary Connector" No. 0549682 (January 31, 2006) by the applicant of the present invention.

As described above, the vacuum packaging machine according to the present invention includes a vacuum release means configured by using a solenoid valve to release the vacuum state by introducing external air into the vacuum space after thermal bonding of the vacuum exhaust inside the vacuum bag and the inlet. Automated vacuum release is possible to enhance user convenience.

In another aspect, the present invention is a vacuum channel for forming a vacuum space in which the inlet of the packaging bag to be stored is formed as a separate member to implement a detachable form, but in the lower body and / or the upper body for the vacuum space forming member The receiving portion and the detachable method of the vacuum space forming member are formed by a pair of fixing parts and detachable parts which are male and female coupled to each other, so that each of the fixing parts is first coupled when attached, and each detachable part is detached first when detached. One side removable type vacuum space forming member is implemented, so the possibility of leakage problem on the exhaust passage leading to the vacuum pump is greatly reduced even after long use.

Furthermore, by adopting the one-touch type locking means, press once to catch the locking projection and press again to release the locking projection so that the formation and release of the vacuum space formed by the sealing member is cut off from the outside by the upper body and the lower body. and,

In addition, to provide a vacuum packaging machine incorporating a support means in front of the lower body hinged to the upper body, and the support means in a form that can be received and withdrawn to the lower body, and the support means is a drawer type It is composed of multi-stage powders that can be combined with each other, foldable, or mixed, so that longer support means can be stored for the same width of the lower body. To make it more convenient,

Furthermore, by introducing a silencer, it is possible to prevent the generation of noise due to the exhaust by the vacuum pump operation.

In the above description of the present invention, a vacuum packaging machine having a specific shape and structure has been described with reference to the accompanying drawings. However, the present invention can be variously modified and changed by those skilled in the art, and such variations and modifications are within the scope of protection of the present invention. Should be interpreted as belonging to.

Claims (13)

Lower body; An upper body arranged in a pivotable form with respect to the lower body; A heater installed at the lower body or the upper body, or both, to heat-bond the vacuum packaging bag; A vacuum space forming member which is arranged on the lower body or the upper body, or both, to block the inlet of the vacuum packaging bag which is evacuated from the outside to form a vacuum space; A vacuum pump connected through a conduit and an exhaust hole communicating with the vacuum space formed by the vacuum space forming member; A vacuum release means including a solenoid valve provided on a conduit connecting the exhaust hole and the vacuum pump arranged in the vacuum space, and an outside air inflow portion communicating with the outside air into the vacuum space through the solenoid valve; And In the vacuum packaging machine comprising a control unit for connecting the solenoid valve of the vacuum release means to the vacuum pump and the exhaust hole in accordance with an input signal, or to connect the outside air inlet and the exhaust hole, The vacuum space forming member is attached to and detached from the receiving portion provided in the lower body or the upper body, or both, The accommodation portion has one side fixing portion and the other side detachable portion, The vacuum space forming member has a corresponding fixing portion and a corresponding detachable portion, When the vacuum space forming member is coupled with the accommodation portion, the corresponding fixing portion must be firstly male-and-female coupled to one side fixing portion of the accommodation portion, And a vacuum releasing means for separating the vacuum space forming member from the accommodating part, first separating the corresponding detachable part from the other detachable part of the accommodating part. delete delete The method of claim 1, The receiving portion is formed with an intermediate hole (仲介 孔) connected through the vacuum pump and the conduit, The exhaust hole is arranged in the vacuum space forming member, And the exhaust hole is in close communication with the intermediate hole when the vacuum space forming member is coupled to the accommodation portion. The method of claim 4, wherein The intermediate hole and the exhaust hole of the accommodation portion are formed in a position biased to either side of the vacuum space forming member, And a fixing portion of the housing portion and a corresponding fixing portion of the vacuum space forming member are provided on the exhaust hole side. The method according to any one of claims 1, 4 and 5, A locking protrusion formed on the lower body or the upper body, and One-touch type locking means is arranged on the upper body or the lower body so as to be fixed to the locking portion of the locking projections, and includes a lock to release the locking projections by pressing once again by the action of a spring and pressing the locking projections again. Vacuum packaging machine having a vacuum release means further comprises. The method of claim 6, The locker of the locking means is a vacuum packaging machine having a vacuum release means characterized in that the outer member is provided for preventing the introduction of foreign matter. The method according to any one of claims 1, 4 and 5, And a support means arranged in front of the lower body to support the stored goods contained in the vacuum packaging bag. The method of claim 8, The support means is a vacuum packaging machine having a vacuum release means characterized in that it can be received and withdrawn in a form overlapping the lower body. The method of claim 8, The support means is a vacuum packaging machine having a vacuum release means characterized in that the form is received in the lower body foldable. The method of claim 8, The support means is a vacuum packaging machine having a vacuum release means characterized in that it has a multi-stage structure consisting of a plurality of powders. The method according to any one of claims 1, 4 and 5, And a silencer connected to the exhaust nozzle of the vacuum pump. The method according to any one of claims 1, 4 and 5, And a filter means for preventing moisture or foreign matter from flowing into the vacuum pump on a conduit connecting the exhaust hole arranged in the vacuum space and the vacuum pump.

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