KR20090026044A - Air pump - Google Patents

Abstract

An air pump is provided to reduce the vibration or vibration noise and/or to prevent chattering of the contact of switch for sensing intake/discharge air pressure. An air pump comprises a crank-shaped mount base(1) of metal material in which a pump chamber formed by diaphragms and an electric motor(2) meet at right angle, an eccentric cam(3) fixed to an output shaft of the electric motor, a cylindrical opening formed in the eccentric cam in parallel with the output shaft of the electric motor, and a balancer(4) equipped in the opening.

Description

Air Pump {AIR PUMP}

The present invention relates to an air pump that intakes and exhausts air in a sealed container.

As a prior art of the air pump of this invention, Unexamined-Japanese-Patent No. 2003-286963 (patent document 1) is mentioned.

The air pump disclosed in Patent Literature 1 has a structure in which a cam outer cylinder and a diaphragm fixed thereto are moved up and down when a cylindrical cam attached to an output shaft of a motor rotates by using an electric motor as a drive source. One embodiment of the air pump is shown by changing the air pressure in the pump chamber and repeating the intake and exhaust by opening and closing the two check valves mounted on the pump chamber upper part.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2003-286963

In the conventional air pump, the pump chamber formed by the electric motor, the cam portion, and the diaphragm is arranged in series, and thus, the overall length thereof becomes long. Also, considering the position and shape of the fixing leg when the product is attached, the overall shape is not balanced. And noise in terms of vibration.

In addition, most of the small-sized air pumps on the market are orthogonal to the pump chamber formed of an electric motor and a diaphragm. However, since the base on which the component parts are installed is a resin molded product, the overall strength is secured and deformation in an environmental atmosphere is achieved. It is difficult to secure the precision including the back. In addition, the pump portion of the small air pump is made of resin, and when the base to which it is installed is a resin-molded product, since the inherent vibration frequency of each material itself is close, it is easy to vibrate. There is a risk of getting bigger.

The eccentric cam fixed to the output shaft of the motor generally uses a brass cut product or zinc die-cast product. In general, the basic shape has a round rod shape. At one end, an axial hole for pressing the output shaft of the motor is pressed. The other end has a support shaft which press-fits a ball bearing. The shaft hole and the support shaft are shifted by a certain amount, not coaxial, and the magnitude of the amplitude of the diaphragm is determined by the shift amount.

When the ball bearing is pressed into the support shaft by the eccentric cam of the above shape, and the movable arm is pushed into the outer diameter of the ball bearing to rotate the motor, the diaphragm fixed to the movable arm is amplified so that air in the pump chamber formed by the diaphragm is formed. Intake and exhaust.

When the air in the pump chamber is intaken and exhausted, the diaphragm is forced by the compressed air in the pump chamber when pressurized to discharge (exhaust) air from the pump chamber. In addition, when the inside of the pump chamber is sucked to draw a negative pressure, the pressure is forced in the direction in which the diaphragm is tensioned with the air by the decompressed air in the pump chamber. In any case, the diaphragm receives a force at the time of intake and exhaust, and this force is transmitted intermittently to the diaphragm case provided with the output shaft of the motor and the diaphragm outer periphery, which causes a large vibration.

This vibration is magnified at the time of operation with the air pump attached to the product, and it becomes the sound of vibration which is judged by hearing, thereby damaging the product quality.

In order to alleviate this vibration, it is necessary to balance in order to offset the force received from the diaphragm. Generally, the axial hole of the eccentric cam described above is shifted from the center of the outer diameter to be a single load, and a method of offsetting and balancing the weight of the eccentric cam itself is selected.

Eccentric cams having the above functions are complicated in shape and very difficult to machine. For this reason, a lot of machining time is required and it is very likely to become an extremely expensive component.

In the case of an air pump, it is not limited to the air pump of a well-known example, A noise becomes a problem.

In response to this, the diaphragm is amplitudeed at high speed, and the check valve also repeats the opening and closing operation. Therefore, the air pressure in the pump chamber pulsates, and this pulsation generates a vibration sound at the diaphragm membrane part. The sound of air leakage will be generated.

In the known example, no improvement measures are described, but commercially available air pumps and the like are sealed with the entire frame to prevent noise from leaking to the outside. In this case, the effect of blocking the noise can be obtained, but the whole becomes large. Therefore, it cannot be assembled to a small product.

It is a fact that most commercially available air pumps, including known examples, are not equipped with switches for detecting the air pressure of intake and exhaust, and cannot adjust the air pressure in a sealed container installed in the pump, resulting in poor use convenience. .

Moreover, when adjusting the air pressure in the sealed container which mounts the switch which detects the air pressure of intake and exhaust, it is pulsating air pressure to operate a switch. Immediately before the contact of the switch operates, the contact of the contact becomes subtle. At this time, if the air pressure is pulsating, a chattering phenomenon occurs at the contact, which greatly affects the durability and detection accuracy of the switch.

An object of the present invention is to provide an air pump that realizes vibration reduction, sound reduction, or chattering prevention of a contact point of a detection switch that detects air pressure of intake and exhaust.

In order to solve the above problems, the present invention is arranged so that the output shaft of the electric motor and the pump chamber formed by the diaphragm A are orthogonal to the fixed base made of metal formed in the crank shape, and the diaphragm A is eccentrically provided on the output shaft of the electric motor. Amplified by the rotation of the cam, the air pump was configured to intake and exhaust air in the pump chamber.

Preferred structural examples of the present invention are as follows.

(1) A membrane-shaped thick portion is formed in the membrane portion of the diaphragm A, and the vibration of the membrane generated by the air pressure fluctuation is suppressed in the thick portion having a large inertial mass.

(2) The eccentric cam has a cylindrical opening hole in the outer periphery of the resin molded article, and this opening hole is provided with a balancer (weight) of arbitrary weight. The balancer can be easily set to an arbitrary length, for example, by machining the end face with a stainless steel drawing material or the like.

(3) Intake and exhaust ports are formed on the upper surface of the pump chamber, and check valves are separately provided. A damper chamber having a discharge port is provided on the upper check valve on the exhaust side, and a breathable filter is provided on the upper surface of the check valve. Install.

(4) An air chamber is formed above the check valve on the inlet port side, and a diaphragm B which operates due to pressure fluctuations in the air chamber is provided, and the diaphragm can operate the detection switch.

(5) A nozzle communicating with the air chamber is provided, a thick tube is inserted into the nozzle outer circumference, connected to a sealed container provided separately, and the inner diameter of the nozzle is divided into two parts including the air chamber, one side of which is a detection switch. It becomes the upper chamber for manipulating, and the other side becomes the lower chamber to reach the pump chamber through the intake port. A thin tube is inserted into the tip of the nozzle connected to the upper chamber to penetrate the thick tube, and the tip protrudes into the sealed container.

According to the present invention, the following effects can be obtained.

By using the metal crank-shaped fixing base, a component can be arrange | positioned compactly in a simple shape. Moreover, since it is made of metal, the overall rigidity can be ensured, and the dimensional change due to the temperature in the environmental atmosphere is also small, and the accuracy can be ensured. Moreover, the fixing leg for attachment to a product can also be easily formed. In the case where the outside of the pump part is made of resin, since the intrinsic vibration frequency of each material itself is different, it is easy to absorb or cancel the vibration, and the vibration can be made small.

By forming a cylindrical opening hole in the rotating eccentric cam and inserting a balancer (weight) into the opening, the balancer can be processed to any size (length and weight), and the rotation can be easily balanced. have. In addition, since the balancer is installed separately from the eccentric cam, it is easy to process and can be made into an inexpensive component.

By using the eccentric cam as a resin molded article, shapes such as the insertion hole of the output shaft of the electric motor, the support shaft into which the ball bearing is inserted, the cylindrical opening hole, and the like can be easily formed, thereby making it an inexpensive component.

By forming a ring-shaped thick portion at the membrane portion of the diaphragm, the area of the membrane portion is reduced and air / vibration is secured while ensuring a flexible elasticity for the diaphragm to change amplitude due to the rigidity and large inertia mass of the ring-shaped thick portion. Even when subjected to the pulsation of the diaphragm, abnormal vibration of the diaphragm can be suppressed, and the vibration sound generated by the vibration of the membrane portion can be reduced.

By providing a damper chamber at the exhaust port side and an upper portion of the check valve, and providing a ventilated filter therein, the filter prevents resonance in the damper interior space and becomes a resistance to air flow. Thereby, the pulsation of the air at the time of exhaust can be buffered, and the vibration sound which arises from a check valve can be reduced.

The air pressure for operating the detection switch is once supplied through the inside of the sealed container by communicating a sealed container provided separately from the air chamber and the nozzle inner diameter portion communicating with the two chambers and separately provided with the chamber on the side on which the detection switch is operated. The pulsation of air can be buffered by the large space volume in the sealed container to prevent chattering of the contacts of the detection switch.

Embodiments of the present invention will be described with reference to Figs.

The fixed base 1 is formed into a crank shape by a metal (steel, brass, etc.) having a sheet thickness of about 2 mm, and the electric motor 2 and the pump chamber 10 are arranged orthogonally, and the output shaft of the electric motor is eccentric. It press-fits into the axial hole 3a of the cam 3. In addition, a through hole 1b is formed in the fixed base 1, and the size of the hole is larger than the maximum outer diameter of the eccentric cam 3 in consideration of assemblability. Although the fixed base 1 is made of metal such as steel or brass, a material corresponding to the required rigidity of the fixed base 1 may be selected by the size, intake and exhaust capacity of the pump chamber 10. For example, when used in an environment where corrosion is likely to occur due to moisture, brass is selected in accordance with the required rigidity, that is, brass of appropriate material is selected by selecting a zinc content of copper. In the case of steel, by selecting what percentage of carbon is contained, it is possible to include the necessary rigidity and other properties.

One end of the eccentric cam 3 has a support shaft 3b, and the inner diameter of the ball bearing 5 is press-fitted, and the support hole 6b of the movable arm 6 is press-fitted into the outer diameter of the ball bearing 5, The end face part of the said support shaft 3b is restrained with a screw so that a press fitting part may not come out.

The notch 6d is formed in the movable arm 6, and when it press-fits into the outer periphery of the ball bearing 5, it has elasticity so that it can be inserted by hand in consideration of assembly property. In addition, one end of the movable arm 6 has a supporting seat surface 6a, and the diaphragm A 7 is fitted and fixed by screws by the surface and the fixing piece 8. The amount of warpage of the diaphragm (A) 7 at the time of being clamped is regulated by the contact surface 6a of the movable arm 6 and the contact surface 8a of the fixing piece 8.

The diaphragm (A) 7 has a sealing rib 7c at its outer circumference and is bent in a predetermined amount so that air does not leak by the fixing grooves A and 9f of the diaphragm case 9 and the fixing base 1. It is fitted and secured with three screws. In addition, a ring-shaped thick portion 7b having a thickness change is formed in the membrane portion 7a of the diaphragm A, and the membrane portion 7a is formed of the ring-shaped thick portion 7b even when the pulsating air pressure is applied. Vibration is suppressed by the rigidity and the inertial mass, and the vibration sound of the membrane portion 7a is reduced.

A pump chamber 10 is formed between the diaphragm case 9 and the diaphragm A, and the diaphragm case 9 is positioned in the reference hole 1a of the fixed base 1 by the dowel 9c. Crystal is fixed.

The diaphragm case 9 is an important component constituting the pump chamber. The diaphragm case 9 has an inlet port 9a and an exhaust port 9b at an upper portion thereof, and an installation hole 9c and a plurality of air passage holes 9d are formed in each. Umbrella check valves 11 and 12 are provided in the mounting holes 9c to control the flow of air.

The nozzle base 14 is fixed to the upper part of the diaphragm case 9 with two screws.

The nozzle base 14 is provided with a damper chamber 14c against the exhaust port 9b of the diaphragm case 9, and has a discharge hole 14d for discharging air in the upper surface of the damper chamber 14c. There is cushioning property, and the air permeable filter 13 is accommodated so that the check valve 12 may be pressed slightly.

The air chamber 14f communicates with the inlet port 9a of the diaphragm case 9 at the center of the nozzle base 14, and has a nozzle portion 14a at the outer circumferential portion, and a thick tube 23 at the nozzle outer diameter portion. It is inserted and connected to the sealed container 25 separately installed so that ventilation is possible.

The air chamber 14f is divided to include the inner diameter of the nozzle portion 14a, and is divided into an upper chamber 14g and a lower chamber 14h so that the upper chamber 14g and the opening seat surface 14e communicate with each other. It is. Moreover, the small diameter nozzle part 14b is provided in the nozzle tip part of the said upper chamber 14g.

A thin tube 21 is inserted into the inner diameter of the small-diameter nozzle portion 14b, the thin tube 21 penetrates through the thick tube 23, and the tip portion protrudes into the sealed container 25 to seal the sealed container. The inside of the chamber 25 and the upper chamber 14f communicate with each other. Moreover, the thin tube 21 is being fixed so that it may not be pulled out by the fixing tube 22 between the outer diameters of the small diameter nozzle part 14b.

The fixed tube 22 uses a heat shrink tube.

The diaphragm (B) 16 is in contact with the opening seat surface 14e, and the sealing ribs (B) 16b of the diaphragm (B) 16 are fixed with the fixing grooves (B) 15a of the switch case 15. It is fitted to the opening sheet surface 14e and is fixed by the fitting hooks B and 15c. As a result, the upper chamber 14g is sealed by the diaphragm (B) 16, and the diaphragm (B) 16 moves up and down by the fluctuation of the air pressure of the upper chamber 14g. .

One surface of the diaphragm (B) 16 has a projection 16a, and a spring support 17 is fitted, and one end of the set spring 18 provided in the upper chamber 14g by the spring support 17. We are supporting wealth.

The detection switch 19 and the switch cover 20 are mounted on the upper part of the switch case 15, and the fitting hooks A and 15b and the fitting step 20a are fitted in the form in which the detection switch 19 is fitted. It is fixed by fitting.

The operation button 19a of the detection switch 19 contacts the concave surface 16c of the diaphragm B 16 to open and close the contact by the vertical movement of the diaphragm B 16. The timing of opening and closing of the contact is determined by the air pressure in the upper chamber 14g and the strength of the set spring 18.

A lead wire is connected to the terminal portion 19b of the detection switch 19 so that the signal for opening and closing the contact is introduced into the control microcomputer.

The protective cover 24 is fixed to the fixing base 1 by screws to protect the fingers and the like from contacting the rotating part during the inspection.

Next, operation | movement of an air pump, especially a negative pressure pump is demonstrated.

Rotation of the electric motor 2 amplitudes the movable arm 6 and the diaphragm A 7 via the eccentric cam 3. As the diaphragm (A) 7 is amplitudeed, the air pressure in the pump chamber 10 is changed to suck air from the intake port 9a and exhaust it from the exhaust port 9b. At this time, the check valves 11 and 12 repeatedly open and close appropriately to create a flow of air in a predetermined direction. The direction in which air flows is determined by the installation direction of the check valves 11 and 12, and it is divided into a pressurized pump or a negative pressure pump by the installation direction of the check valve.

When the center of the diaphragm case 9 becomes the inlet port 9a and the air in the pump chamber 10 is compressed, the check valve 11 of the inlet port 9a is provided in a direction in which air does not leak, and the exhaust port 9b The side is attached in the direction of discharging air. In the case of a pressure pump, this is the opposite.

As the diaphragm A 7 amplitudes, air in the separately sealed container 25 is sucked through the thick tube 23. At the same time, air in the upper chamber 14g in communication with the thin tube 21 is also sucked through the sealed container 25.

The detection switch 19 is operated when the diaphragm (B) 16 resists the set spring 18 by a predetermined amount due to the air pressure in the sealed container 25, that is, the air pressure in the upper chamber 14g. By changing the spring force of (18), the air pressure in the sealed container 25 can be set arbitrarily. However, in the case of a pressure pump, the air pressure detected by the pressing force of the operation button 19a of the detection switch 19 is prescribed | regulated, and the set spring 18 becomes unnecessary.

The moment when the detection switch 19 operates is a delicate balance between the detection air pressure and the combined force of the operation button 19a and the resistance of the set spring 18. At this time, if the air pressure pulsates with the amplitude of the diaphragm, the detection switch ( The contacts in 19 cause chattering.

Chattering is undesirable in consideration of the durability of the contacts and the signal processing of the microcomputer.

In order to eliminate this phenomenon, the air chamber 14f is divided into two, separated into the upper chamber 14g and the lower chamber 14h, and the upper chamber 14g and the sealed container 25 communicate with each other to generate the air pressure generated in the pump chamber. The pulsation of the air is alleviated in the sealed container 25 to reduce the pulsation of air in the upper chamber 14g which directly operates the detection switch 19 to prevent chattering of the contacts.

In order to prevent chattering of the contact point, the upper chamber 14g and the inside of the sealed container 25 are communicated with each other, and as shown in the present invention, a tube thinning the nozzle portion 14a and the sealed container 25 ( 21 and the coarse tube 23 are connected, but a method of extending the nozzle portion 14a and directly connecting the sealed container 25 is also contemplated.

When the diaphragm (A) 7 is amplified and the air is taken in from the intake port 9a and exhausted from the exhaust port 9b, the air in the pump chamber 10 is pulsating, and the membrane portion 7a and the exhaust port of the diaphragm in contact with it. The check valve 12 at 9b vibrates to generate a large vibration sound.

In consideration of the vibration sound, a ring-shaped thick portion 7b having a thickness deviation is formed in the membrane portion 7a of the diaphragm A, and the upper portion of the check valve 12 of the exhaust port 9b. In the damper chamber 14c, a damper chamber 14c is provided, and a filter 13 is provided in the damper chamber 14 so as to press the contact surface of the check valve 12 slightly.

In addition, the vibration noise reduction of the diaphragm (A) 7 is considered to reduce the vibration by making the area of the membrane portion 7a as small and thick as possible. The force necessary to increase becomes large, and it is unpreferable from the load on a motor, bending durability, etc.

Next, the refrigerator with an air pump of one Embodiment of this invention is demonstrated using drawing.

First, the entire refrigerator will be described with reference to FIGS. 20 to 22. 20 is a front view of the refrigerator of the present embodiment, FIG. 21 is a central longitudinal cross-sectional view of the refrigerator of FIG. 20, and FIG. 22 is a front view of the refrigerator main body of FIG.

The refrigerator comprises a refrigerator main body 101 and doors 106 to 110. The refrigerator main body 101 is composed of a urethane foam heat insulating material 113 and a vacuum heat insulating material (not shown) between an outer box 111 made of steel and an inner box 112 made of resin, and further includes a refrigerating compartment 102, A plurality of storage chambers are provided in the order of the freezing chambers 103 and 104 and the vegetable chamber 105. In other words, the refrigerating chamber 102 and the vegetable chamber 105 are partitioned and arranged in the uppermost part, and the refrigerating chamber 103 and 104 thermally partitioned between both chambers between these and the refrigerating chamber 102 and the vegetable chamber 105, respectively. ) Is arranged. The refrigerating compartment 102 and the vegetable compartment 105 are storage compartments of the refrigerating temperature zone, and the freezing compartments 103 and 104 are the storage compartments of the refrigerating temperature zone of 0 degrees C or less (for example, the temperature range of about -20 degreeC to -18 degreeC). to be. In addition, the freezing chamber 103 is divided into an ice making chamber 103a and a rapid freezing chamber 103b. These storage chambers 102 to 105 are partitioned by partition walls 133, 134 and 135.

Doors 106 to 110 are provided on the front surface of the refrigerator body 101 to close the openings of the front surfaces of the storage chambers 102 to 105. The refrigerating compartment door 106 is a door that closes the front opening of the refrigerating compartment 102, the ice making compartment door 107 is a door which closes the front opening of the ice making chamber 103a, and the quick freezing compartment door 108 is a rapid freezing compartment ( The door closing the front opening of 103b), the freezer compartment door 109 are the door closing the front opening of the freezing compartment 104, and the vegetable compartment door 110 are the doors closing the front opening of the vegetable compartment 105. The refrigerating compartment door 106 is comprised of the door which opens and closes, and the ice-making compartment 103a, the quick freezing compartment 103b, the freezer compartment 104, and the vegetable compartment 105 are comprised by the pull-out door, and with draw-out door, The container in the storage compartment is withdrawn.

The refrigerator main body 101 is provided with a refrigeration cycle. This refrigeration cycle is configured by connecting a compressor 114, a condenser (not shown), a capillary tube (not shown), an evaporator 115, and a compressor 114 in that order. The compressor 114 and the condenser are installed in the machine room installed in the lower back of the refrigerator main body 101. The evaporator 115 is installed in the cooler chamber provided behind the freezer compartments 103 and 104, and the blowing fan 116 is provided above the evaporator 15 in this cooler chamber.

The cold air cooled by the evaporator 115 is sent to each of the storage chambers of the refrigerating chamber 102, the ice making chamber 103a, the frost freezing chamber 103b, the freezing chamber 104 and the vegetable chamber 105 by the blowing fan 116. Specifically, the cold air sent by the blower fan 116 is sent to the storage compartment of the cold storage temperature of the refrigerator compartment 102 and the vegetable compartment 105 through the damper apparatus which can be opened and closed, and the other part is an ice-making compartment 103a. ), The freezing chamber 103b and the freezing chamber 104 are sent to the storage chamber of the freezing temperature range.

The cold air sent to the refrigerating chamber 102, the ice making chamber 103a, the quick freezing chamber 103b, the freezing chamber 104, and the vegetable chamber 105 by the blowing fan 116 cools each storage chamber, and then returns to the cold air. It is returned to the cooler chamber through the passage. Thus, the refrigerator of this embodiment has the circulation structure of cold air, and maintains each storage compartment 102-105 at appropriate temperature.

In the refrigerating chamber 102, the multi-stage shelf 117-120 comprised by the transparent resin plate is provided so that removal is possible. The lowermost shelf 120 is provided in contact with the rear and both side surfaces of the inner box 112, and partitions the lowermost space 121 which is the lower space into the upper space. In addition, a plurality of door pockets 125 to 127 are provided inside each refrigerator door 106, and these door pockets 125 to 127 protrude into the refrigerator compartment 102 with the refrigerator door 106 closed. It is installed if possible.

Next, with reference to FIGS. 21-25, arrangement | positioning of the apparatus in the lowest space 121 of the refrigerating chamber 102 is demonstrated. FIG. 23 is a front view of the refrigerator compartment part of the refrigerator body of FIG. 20; FIG. 24 is a plan view of the lowest space portion of the refrigerating compartment of FIG. FIG. 25 is a sectional perspective view of the lowest space portion of the refrigerating compartment of FIG.

In the lowermost space 121 in order from the left side, the ice making tank 122 for supplying the ice making water to the ice making tray of the ice making chamber 103a, the storage case 123 for storing food, such as dessert, A seal 124 is provided for maintaining the freshness of food and for long term preservation. The chamber 124 refers to a storage chamber configured to be made lower than atmospheric pressure from atmospheric pressure by the pressure reducing means (air pump or the like). The chamber 124 has a width smaller than the width of the refrigerating chamber 102 and is disposed adjacent to the side surface of the refrigerating chamber 102.

Thus, since the chamber 124 is arrange | positioned in the lowest space 121 of the refrigerator compartment 102 arrange | positioned on the freezer compartment 103 and 104 of the refrigerator, and the vegetable compartment 105, it is easy to use.

The ice making tank 122 and the storage case 123 are disposed behind the refrigerating compartment door 106 on the left side. Thereby, the ice-making water tank 122 and the storage case 123 can be taken out only by opening the refrigerator compartment door 106 of the left side. In addition, the chamber 124 is arrange | positioned behind the refrigerator compartment door 106 of the right side. Thereby, the food tray 160 (refer FIG. 25) of the seal 124 can be taken out only by opening the refrigerator compartment door 106 of the right side. In addition, the ice-making tank 122 and the storage case 123 are located at the rear of the lowermost door pocket 127 of the left side refrigerator compartment door 106, and the seal 124 of the right side refrigerator compartment door 106 is The rear door pocket 127 is located behind.

The ice-making water pump 128 is provided in the back of the ice-making tank 122, as shown in FIG.24 and FIG.25. In the space behind the storage case 123 and on the rear side of the chamber 124, as shown in FIGS. 24 and 25, an air pump 129 which is an example of the pressure reduction means for depressurizing the chamber 124 is provided. It is arranged. Thereby, the air pump 129 can easily connect a conduit to the pump connection part provided in the side surface of the seal 124, and can easily maintain from the front by taking out the storage case 123. As shown in FIG.

Next, with reference to FIGS. 25-28, the basic structure of the seal 124 and its cooling method are demonstrated. 25 is a sectional perspective view of the lowermost space portion of the refrigerating compartment of FIG. 23, FIG. 26 is a front view of the rear panel of the refrigerating compartment of FIG. 23, FIG. 27 is a longitudinal sectional view of the vicinity of the chamber of the refrigerating compartment of FIG. 23, and FIG. 28 is a refrigerating compartment of FIG. Perspective view of a thread.

The seal 124 includes a box-shaped thread main body 140 having an opening for food in and out, a seal door 150 for opening and closing an opening for food in and out of the seal main body 140, and a seal door 150 for storing food. It is comprised including the food tray 160 putting into and out of a container. By closing the food outlet opening and closing portion 42a of the seal door 150 with the seal body 140, the space surrounded by the seal door 50 and the food tray 60 is formed as a low pressure space 141 in which the pressure is reduced. The food tray 160 is provided on the back side of the seal door 150 and can move back and forth with the movement of the seal door 150.

The seal body 140 is a resin outer shell 142 having excellent chemical resistance, impact resistance and moldability, a glass plate 143 (for example, tempered glass) made of transparent tempered glass, and a metal plate such as a steel sheet. The shape member 144 and the resin door coupling member 148 are provided.

The outer portion 142 has a substantially rectangular parallelepiped shape, an opening and closing portion 142a for food entry and exit is formed on the front surface, and an opening 142b for loading glass plate on the upper surface. The outer reinforcing ribs 142f are formed on the outer surfaces of the side walls 142c, the bottom wall 142d, and the rear wall 142e constituting the outer 142 so as to increase the strength of the outer 142. .

The glass plate 143 is hermetically mounted in the glass plate loading opening 142b via the annular packing 145, and forms the upper wall of the seal main body 140. This glass plate 143 is provided with the strength which prevents the glass plate loading opening part 142b from deforming inside by a pressure reduction force. In addition, by providing the transparent glass plate 143 on the upper surface of the outer periphery 142, the inside of the chamber 124 can be viewed.

The plate-shaped member 144 is formed on both side walls 142c of the outer side 142 to prevent deformation of both side walls 142c and the bottom wall 142d and the back wall 142e due to the pressure reduction force. It is provided so that it may extend along the bottom wall 142d and the back wall 142e.

The seal main body 140 has a box-shaped resin outer 142 formed with a front opening and closing portion 142a on the front surface, and both side walls 142c, a bottom wall 142d and a rear wall 142e of the outer 142. Since it has the metal plate-shaped member 144 extended along (), it can be set as a cheap structure compared with the case where the whole outer edge 142 is formed by a metal plate. In addition, since the outer portion 142 can be made of resin, the installation structure and the like can be simplified.

The door engagement member 148 is provided in the upper surface of the opening-and-closing opening 142a as shown in FIG. The door coupling member 148 includes an inverted U-shaped portion 148a accommodated in the recess 142a ₁ formed on the upper surface of the food outlet opening and closing portion 142a, and a door coupling extending forward from the inverted U-shaped portion 148a. The hook portion 148b is integrally molded. The door engaging hook 148b is provided with a width substantially equal to that of the door handle 152, and is coupled between the upper portion of the door handle 152 and the front and rear positioning upper end portion 151e. And the door handle 152 is comprised so that engagement may be released by rotating around the hinge part 152a.

The rear panel 130 is provided at the back of the refrigerating chamber 102 to form a passage through which the cold air supplied from the blowing fan 116 passes. The rear panel 130 has a cold air discharge port (first cold air discharge port) 131 for cooling the refrigerator compartment for supplying cold air to the refrigerating compartment 102 and a chamber 124 for supplying cold air to the lowermost space 121 of the refrigerating compartment 102. The cooling air discharge port (second cold air discharge port) 132 and the cold air return port 133 are formed. The cold air return port 133 is located on the side close to the side surface of the refrigerating chamber 102 at the rear of the back of the chamber 124.

The cold air discharge port 132 is formed toward a gap between the upper surface of the chamber 124 and the lower surface of the shelf 120. The cold air discharged from the cold air discharge port 132 flows a gap between the upper surface of the chamber 124 and the lower surface of the shelf 120 as the cold air passage 137 to cool the chamber 124 from the upper surface. Therefore, the inside of the chamber 124 is indirectly cooled.

Here, the chamber 124 is disposed close to the right side of the refrigerating chamber 2 to eliminate the gap on the right side of the chamber 124, and at the left end of the upper surface of the chamber 124, a shelf (not shown) is provided. Since the gap on the left side of the chamber 124 is eliminated, the cold air discharged from the cold air discharge port 132 flows through the upper surface of the chamber 124 without being classified into left and right sides of the chamber 124. Thereby, the amount of cold air which cools the upper surface of the chamber 124 can be increased, and the inside of the chamber 124 can be cooled rapidly. The cold air cooling the upper surface of the chamber 124 is sucked into the cold air return port 133 from the front of the chamber 124 through the left side surface of the chamber 124, and is returned to the cooler chamber through the cold air return passage. Since the cold air return port 133 is located on the side close to the side surface of the refrigerating chamber 102 at the rear of the back of the chamber 124, the cold air comes into contact with the rear surface and the left side of the chamber 124 to cool.

In this way, the seal 124 is indirectly cooled by the cold air passing through the outside. In addition, the cold air cooled in the entire refrigerating chamber 102 is sucked into the cold air return port 133.

The cold air return port 133 is formed in a portion of the rear panel 130 that faces the rear wall 142e of the outer portion 142. This back wall 142e is formed inclined so that the bottom wall side may be forward. Thereby, sufficient return air path can be ensured between the back wall 142e and the back panel 130. FIG. Moreover, the back panel 130 has a part which inclines and protrudes corresponding to the inclination of the back wall 142e, and forms the cold air return port 133 in this part. As a result, the ventilation area of the cold air return port 133 can be sufficiently secured.

Next, the outline 142 will be described in detail with reference to FIG. 29 is a perspective view of the outer portion 142 viewed from the upper left side.

The outer part 142 has the latching projection part 142h provided in the both side wall 142c and the back wall 142e, the pump connection part 142i provided in the side wall 142c, and the pressure switch connection part 142j.

The pump connecting portion 142i has a passage communicating with the inside and the outside of the outer portion 142, and is connected to the air pump 129 through a conduit 129a (see FIG. 28). The interior of the outer 142 is depressurized by the air pump 129 via the pump connection 142i. The pump connection part 142i is provided in the back part of the side wall of the outer side 142 so that the plate-shaped member 144 may open. A space is formed between the pump connection part 142i and the plate-shaped member 144 so that the pressure reduction inside the outer part 142 can be performed easily.

The pressure switch connecting portion 142j has a passage communicating the inside and the outside of the outer portion 142 and is connected to the pressure switch. The pressure inside the outer portion 142 is detected by the pressure switch via the pressure switch connecting portion 142j.

1 is a plan view showing an embodiment of the present invention.

2 is a cross-sectional view taken along line A-A of FIG.

3 is a plan view of the fixing base 1 of the present invention.

4 is a front view of the eccentric cam 3 of the present invention.

5 is a cross-sectional view taken along line B-B in FIG.

6 is a front view of the movable arm 6 of the present invention.

FIG. 7 is a cross-sectional view taken along the line C-C in FIG. 6; FIG.

Fig. 8 is a sectional view of the diaphragm A 7 of the present invention.

9 is a cross-sectional view of the fixing piece of the present invention.

Fig. 10 is a plan view of the diaphragm case 9 of the present invention.

FIG. 11 is a sectional view taken along the line D-D in FIG. 10; FIG.

12 is a plan view of the nozzle base 14 of the present invention.

Fig. 13 is a sectional view taken along the line E-E in Fig. 12;

Fig. 14 is a plan view of the switch case 15 of the present invention.

Fig. 15 is a sectional view taken along the line F-F in Fig. 14;

Figure 16 is a sectional view of the diaphragm (B) 16 of the present invention.

Fig. 17 is a schematic diagram of the detection switch 19 of the present invention.

18 is a plan view of a switch cover 20 of the present invention.

Fig. 19 is a sectional view taken along the line G-G in Fig. 18;

20 is a front view of the refrigerator main body of one embodiment of the present invention;

FIG. 21 is a longitudinal sectional view of the refrigerator main body of FIG. 20; FIG.

22 is a front view of the refrigerator main body of FIG. 20;

FIG. 23 is a front view of the refrigerator compartment part of the refrigerator body of FIG. 20; FIG.

Fig. 24 is a plan view of the lowest space portion of the refrigerating compartment of Fig. 23;

FIG. 25 is a sectional perspective view of the lowermost space portion of the refrigerator compartment of FIG. 23; FIG.

FIG. 26 is a front view of the rear panel of the refrigerator compartment of FIG. 23; FIG.

Fig. 27 is a longitudinal sectional view of the vicinity of the seal of the refrigerating compartment of Fig. 23;

FIG. 28 is a perspective view of a seal of the refrigerator compartment of FIG. 23; FIG.

Fig. 29 is a sectional perspective view of the outline of the seal of Fig. 25;

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

1: fixed base

1a: reference hole

1b: through hole

2: electric motor

3: eccentric cam

3a: shaft hole

3b: Support shaft

3c: opening hole

4: Balancer

5: ball bearing

6: movable arm

6a: backing seat surface

6b: support hole

6c: Supporting surface

6d: notch groove

7: Diaphragm (A)

7a: Shogunate

7b: ring-shaped thick part

7c: sealing rib

Claims (7)

An air pump provided with an electric motor and a diaphragm, wherein the air pump and the pump chamber formed by the diaphragm are orthogonally disposed on a metal crank-shaped fixed base. In an air pump provided with an electric motor and a diaphragm, the eccentric cam is fixed to the output shaft of the motor, and the diaphragm is vibrated to perform intake and exhaust. The eccentric cam is provided with a cylindrical opening hole so as to be parallel to the output shaft of the motor. And a balancer in this opening hole. In an air pump having an electric motor and a diaphragm, and fixing an eccentric cam to an output shaft of the motor, and vibrating the diaphragm, the eccentric cam is formed as a resin molded part to form a shaft hole for pressing the output shaft of the electric motor at one end thereof. An air pump comprising a support shaft for press-fitting a ball bearing at an end portion. An air pump that intakes and exhausts a diaphragm by amplitude, and has a ring-shaped thick portion formed in the membrane portion of the diaphragm. In the air pump which amplifies a diaphragm and performs intake and exhaust, the air pump provided with the damper chamber which has a discharge hole in the upper part of an exhaust side check valve, and provided the air permeable filter in the upper surface of the said check valve. . In the air pump having the diaphragm intake and exhaust, and having an air pressure detection switch, an upper chamber for operating the detection switch and a lower chamber leading to the pump chamber formed by the diaphragm are separately provided to operate the detection switch. An air pump characterized in that the upper chamber for communicating with the sealed container provided separately. In an air pump having a diaphragm that intakes and exhausts, and has an air pressure detecting switch, the inner diameter of a nozzle connecting a thick tube from a separately sealed container is divided, and one side is an upper chamber for operating the detecting switch. And the other side is a lower chamber leading to a pump chamber formed by a diaphragm, and extends the tip end portion of the nozzle on the upper chamber side for operating the detection switch, and penetrates the inner diameter of a thick tube that is already connected to protrude into the sealed container. Air pump, characterized in that.

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