CN2311738Y

CN2311738Y - Negative pressure fresh-keeping device for refrigerator

Info

Publication number: CN2311738Y
Application number: CN 97248850
Authority: CN
Inventors: 石彦
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-04
Filing date: 1997-12-04
Publication date: 1999-03-24
Anticipated expiration: 2007-12-04

Abstract

The utility model relates to a negative pressure fresh-keeping device for a refrigerator, which belongs to the technical field of cold storage fresh-keeping technology, comprising a shell body 5, a drawer 6 and a control circuit. The back part of the shell body 5 is provided with a one-way valve, the air outlet pipe 4 of the one-way valve is communicated with the air inlet pipe 8 of a sucking pump, the air outlet pipe 9 of the sucking pump is communicated with a hole 10 of the shell body 5, a sealing cushion 7 is arranged at the tight point of the drawer 6 and the shell body 5, and the end surface of the drawer 6 is provided with an exhaust valve 11. The utility model has the advantages of convenient operation. When articles to be kept fresh are put in the utility model, the articles are put in the refrigerating chamber of the refrigerator, and the refreshing time can be prolonged to more than 15 days.

Description

A kind of negative pressure preservation device that is used for refrigerator

The utility model relates to a kind of negative pressure preservation device that is used for refrigerator, belongs to the cold storing and fresh-keeping technical field.

Current refrigerator can not reach long-time preservation by low temperature both at home and abroad at present, and main cause is refrigerator inside air and food or vegetables can not be isolated, so the shelf-life is very short.People just can only adopt preservative film, and food bag reduces food or vegetables loss moisture content.Its freshness date is prolonged, and this method not only bothers but also waste, and the food bag that has in addition also pollutes the environment.

The purpose of this utility model is in order to solve above-mentioned disadvantage, to have designed a kind of negative pressure preservation device that is used for refrigerator, making the food or the fresh-keeping of vegetables phase that are placed on wherein can extend to more than 15 days.

In order to achieve the above object, adopt following technical scheme:

A kind of negative pressure preservation device that is used for refrigerator, comprise housing 5 and drawer 6, control circuit is characterized in that at the rear portion of housing 5 check valve being set, the escape pipe 4 of check valve communicates with the air inlet pipe 8 of the aspiration pump that is arranged on housing 5 rear portions, the escape pipe 9 of aspiration pump communicates with hole 10 on the housing 5, drawer 6 and housing 5 are established sealing gasket 7 at the place of closing, and a vent valve 11 is set on drawer 6 end faces.

The utility model is used for the negative pressure preservation device of refrigerator, can be placed in the refrigerating chamber of refrigerator, after holding vegetables or food in the negative pressure preservation device, start aspiration pump, make in the negative pressure preservation device and produce negative pressure, under the temperature of refrigerating chamber certain condition, negative pressure is lower, and freshness date is longer.When the needs taking-up holds food, discharge vent valve 11, can pull the drawer out 6.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the generalized section of embodiment that is used for the negative pressure preservation device of refrigerator;

Fig. 2 is the partial cutaway schematic of A-A among Fig. 1;

Fig. 3 is the control circuit of aspiration pump among Fig. 2.

The utility model is used for the negative pressure preservation device embodiment of refrigerator as shown in fig. 1.The rear portion of housing 5 is provided with a check valve, and check valve is made up of inner conical surface sleeve 1 bearing sleeve 3 and valve plug 2.The cone segments of valve plug 2 and inner conical surface sleeve 1 are complementary; The cylinder axle head of valve plug 2 and the inner cylinder face of bearing sleeve 3 are slidingly matched.Inner conical surface sleeve 1 and bearing sleeve 3 are behind the valve plug 2 of packing into, and sealing is fastenedly connected, and check valve is fixed on the rear wall of housing 5, and the rear wall of housing 5 can be designed to removable being tightly connected.The escape pipe 4 of check valve is arranged on the bottom of bearing sleeve 3, and the escape pipe 4 of check valve is connected with the air inlet pipe 8 usefulness pipe 12 of the aspiration pump that is arranged on housing 5 rear portions, sees shown in Figure 2.

Fig. 2 is the partial cutaway schematic of A-A among Fig. 1.Aspiration pump mainly is by elastic bag 13, the pump housing 14, and bleed valve block 15 and exhaust valve plate 16, lever 17 is formed, and control circuit is installed on the circuit board 21 except that iron core 19 and line chart 20.Fixedly connected with bar between elastic bag top, 13 outer end and the lever 17, the fulcrum 22 of lever 17 is arranged on the extension bar of the pump housing 14, and the other end fixed magnet 18 of lever 17 is as the force of lever 17.Bleed valve block 15 between the aspirating hole and elastic bag 13 inwalls of the pump housing 14.Exhaust valve plate 16 is positioned at escape pipe one side of the pump housing 14 steam vents.Lever 17 makes elastic bag 13 pressurizeds and resets when fulcrum 22 swings, when the air bag pressurized, valve block 15 is closed, and bleed-off passage cuts out, and valve block 16 is opened, and open the exhaust passage, and discharge in the hole 10 of the gas in the pump housing 14 on escape pipe 9 and housing 5.When air bag resetted, valve block 16 was closed, and the exhaust passage is closed; Valve block 15 is opened, and the air in the device is because the valve plug 2 of check valve rises, and through the escape pipe 4 of check valve, through managing 12, the air inlet pipe 8 of aspiration pump sucks in the pump housing of bleeding again.Reciprocation cycle, the gas in will device is extracted out, forms negative pressure, stops to bleed after reaching the negative pressure of regulation.Can timer be set in control circuit finishes.Can establish two same mechanism of symmetry in order to increase efficient, as shown in Figure 2.

Fig. 3 is the control circuit figure of aspiration pump among Fig. 2.Coil 20 in this control circuit, unshakable in one's determination 19 also illustrates in Fig. 2, if timer T adopts electronic timer can be installed on the circuit board, if adopt mechanical timer can be installed in the easy operating place of housing 5.Other element is installed in (see figure 2) on the circuit board 21.One termination coil 20 of AC power, another termination timer of AC power, electronic timer or machinery or timer can both be buied on market, no longer describe in detail here.The other end of coil 20 and the other end of timer connect the A utmost point and the B utmost point of bidirectional triode thyristor G1 respectively, bidirectional triode thyristor can adopt A701, the B utmost point connecting resistance R3 of bidirectional triode thyristor G1, the A utmost point connects capacitor C 1, control utmost point C connecting resistance R1, resistance R 1 and capacitor C 1 are connected in parallel between the A utmost point and the C utmost point of bidirectional triode thyristor G1.Adjustable potentiometer W1 is connected between resistance R 3 and the R1, but if needed can a resistance R 2 in parallel at valve potentiometer W1 two ends.

Aspiration pump and control circuit board 21 can be installed in the box 23, and this box is at pipe 12, and the escape pipe 9 of aspiration pump and the power line exit of circuit board are provided with closed hole.

Aspiration pump also can adopt commercially available various types of vavuum pumps, can be by the internal capacity of the fresh-keeping negative pressure preservation device of the negative pressure that is used for refrigerator, and the vacuum and the required time that require to reach are determined the vacuum pump size.

Check valve also can adopt commercially available various types of check valves.

Claims

1, a kind of negative pressure preservation device that is used for refrigerator, comprise housing (5) and drawer (6), control circuit is characterized in that at the rear portion of housing (5) check valve being set, the escape pipe of check valve (4) communicates with the air inlet pipe (8) of the aspiration pump that is arranged on housing (5) rear portion, the escape pipe of aspiration pump (9) communicates with hole (10) on the housing (5), drawer (6) is established sealing gasket (7) with housing (5) at the place of closing, on drawer (6) end face vent valve (11) is set.

2, the negative pressure preservation device that is used for refrigerator according to claim 1, it is characterized in that aspiration pump is by elastic bag (13), be with the pump housing (14) of bleed valve block (15) and exhaust valve plate (16) to form, fixedly connected between elastic bag (13) top, outer end and the lever (17) with bar, the fulcrum (22) of lever (17) is arranged on the extension bar of the pump housing (14), the other end fixed magnet (18) of lever (17); The pump housing (14) bottom is provided with air inlet pipe (8), and the top is provided with escape pipe (9), and the valve block of bleeding (15) is positioned between the aspirating hole and elastic bag (13) inwall of the pump housing (14), and exhaust valve plate (16) is positioned at escape pipe one side of the pump housing (14) steam vent.

3, the negative pressure preservation device that is used for refrigerator according to claim 1 is characterized in that check valve is by inner conical surface sleeve (1), and bearing sleeve (3) and valve plug (2) are formed, and the cone segments of valve plug (2) and conical surface sleeve (1) are complementary; The inner cylinder face of the cylinder axle head of valve plug (2) and bearing sleeve (3) is slidingly matched; Inner conical surface sleeve (1) and bearing sleeve (3) sealing are fastenedly connected.

4, the negative pressure preservation device that is used for refrigerator according to claim 1, it is characterized in that, one termination of the AC power of control circuit has the coil (20) of iron core (19), the other end of another termination timer (T) coil (20) of AC power and the other end of timer (T) connect the A utmost point and the B utmost point of bidirectional triode thyristor (G1) respectively, the B utmost point connecting resistance (R3) of bidirectional triode thyristor (G1), the A utmost point connects electric capacity (C1), control utmost point C connecting resistance (R1), resistance (R1) and electric capacity (C1) are connected in parallel between the A utmost point and the C utmost point of bidirectional triode thyristor (G1), and adjustable potentiometer (W1) is connected between resistance (R3) and the resistance (R1).