CN206291587U - Refrigerating device - Google Patents

Abstract

The utility model provides a kind of refrigerating device, and it includes：Casing, storage space is defined in it；Multiple first closed components, it is arranged in storage space, defines fresh-keeping subspace in it respectively, the first closed component is respectively arranged with oxygen-enriched membrane component, the surrounding space of oxygen-enriched membrane component is connected with fresh-keeping subspace, and oxygen rich gas collecting chamber is formed with oxygen-enriched membrane component；Aspiration pump, its inlet end is respectively communicated to the oxygen rich gas collecting chamber of multiple first closed components via exhaust pipe, and is configured to outwards extract the gas of oxygen rich gas collecting chamber out, so as to reduce the oxygen concentration in fresh-keeping subspace；One or more second closed components are also disposed in storage space; keep-alive subspace is defined in it; keep-alive subspace is respectively communicated to the outlet side of aspiration pump via gas exhaust piping; to receive the gas from oxygen rich gas collecting chamber, so as to form oxygen concentration higher than 70% beneficial to the atmosphere of fresh keep-alive.

Description

Refrigerating device

Technical field

The utility model is related to storing technical field, more particularly to a kind of refrigerating device.

Background technology

Food is the energy source of people's existence, most important for people.For food storage, main two Aspect is to be incubated and fresh-keeping, it is however generally that, temperature has obvious for the effect of the microbial activities on food, the enzyme in food Influence, the reduction of temperature can make food delay to go bad, and refrigerator is to maintain a kind of refrigeration plant of constant low temperature, is also that one kind makes Food or other articles keep the product for civilian use of constant low temperature cold conditions.

With the raising of quality of the life, consumer to storing the fresh-keeping requirement of food also more and more higher, particularly to food The requirement of color and luster, the mouthfeel of thing etc. also more and more higher.Therefore, the food of storage should also be as ensureing during storing, the color of food Pool, mouthfeel, freshness etc. keep constant as far as possible.Therefore user it is also proposed higher wanting to the preservation technique of refrigerator Ask.

Especially, some consumers also propose special requirement to preservation of fishery requirement at present, at present, even if inclined From coastal hinterland, fresh and living aquatic products are also to be seen everywhere.But fresh and living aquatic products (such as live fish work shrimp work crab etc.) exist Cannot realize keep-alive storage, it is necessary to cook as early as possible, this brings very big inconvenience to user, have impact on consumer in the prior art Enjoy fresh and living aquatic products.

Utility model content

A purpose of the present utility model is to provide for a kind of there is provided a kind of refrigerating for being capable of keep-alive storage function Device.

The utility model one is further objective is that will cause that refrigerating device can also improve the preservation of vegetable and fruit Quality.

The utility model provide firstly a kind of refrigerating device, and it includes：Casing, storage space is defined in it； Multiple first closed components, are arranged in storage space, and fresh-keeping subspace is defined respectively in multiple first closed components；Each Oxygen-enriched membrane component is respectively arranged with first closed component, oxygen permeable membrane is provided with oxygen-enriched membrane component, around oxygen-enriched membrane component Space is connected with fresh-keeping subspace, and oxygen rich gas collecting chamber is formed with oxygen-enriched membrane component；Aspiration pump, its inlet end is via pumping Pipeline is respectively communicated to the oxygen rich gas collecting chamber of multiple first closed components, and is configured to the gas of oxygen rich gas collecting chamber Outwards extract out, so that at least part of oxygen in the fresh-keeping subspace of multiple first closed components enters oxygen rich air by oxygen permeable membrane Body collecting chamber, so as to reduce the oxygen concentration in the fresh-keeping subspace of multiple first closed components；One or more are second closed Component, is also disposed in storage space, and keep-alive subspace is defined in it, and keep-alive subspace is respectively communicated to via gas exhaust piping The outlet side of aspiration pump, it is high so as to form oxygen concentration in keep-alive subspace to receive the gas from oxygen rich gas collecting chamber In 70% atmosphere for being beneficial to fresh keep-alive.

Alternatively, above-mentioned refrigerating device also includes：First valve module, is arranged in exhaust pipe, and is configured to adjust The on off operating mode of section aspiration pump and multiple first closed components；Second valve module, is arranged in gas exhaust piping, and is configured to regulation The on off operating mode of aspiration pump and the second closed component.

Alternatively, the first valve module includes multiple air inlets and a gas outlet, each air inlet point of the first valve module An oxygen rich gas collecting chamber for the first closed component is not communicated to, and the gas outlet of the first valve module is communicated to the air inlet of aspiration pump End, and multiple air inlets of the first valve module and a gas outlet controllably carry out break-make respectively so that change aspiration pump with The on off operating mode of multiple first closed components.

Alternatively, the second closed component is multiple, and the second valve module includes multiple gas outlets and an air inlet, the The air inlet of two valve modules is communicated to the outlet side of aspiration pump, and each gas outlet of the second valve module is respectively communicated to one second Closed component, and multiple gas outlets of the second valve module and an air inlet controllably carry out break-make respectively, so as to change take out The on off operating mode of air pump and multiple second closed components.

Alternatively, above-mentioned refrigerating device also includes：First gas detection means, is arranged in fresh-keeping subspace, and It is configured to detect the atmosphere index in fresh-keeping subspace；Second gas detection means, is arranged in keep-alive subspace, and match somebody with somebody It is set to the atmosphere index in detection keep-alive subspace；And aspiration pump is configured to according to first gas detection means and The testing result of two gas-detecting devices is turned on and off.

Alternatively, the first valve module be configured to according to the atmosphere index bleeding regulating pump in fresh-keeping subspace with it is many The on off operating mode of individual first closed component；And the second valve module, is configured to be referred to according to the atmosphere in keep-alive subspace The on off operating mode of mark bleeding regulating pump and multiple second closed components.

Alternatively, aspiration pump is arranged in the compressor room of refrigerating device, and exhaust pipe and gas exhaust piping point It is not embedded in the foaming layer of refrigerating device.

Alternatively, each first closed component includes respectively：First drawer cylinder, with preceding to opening, and is arranged at storage In object space；First drawer body, is slidably mounted in the first drawer cylinder, with from the forward direction opening of the first drawer cylinder Operationally outwards extract out and be inwardly inserted into, and the end plate of the first drawer body is formed with the forward direction opening of the first drawer cylinder Fresh-keeping subspace is formed in sealing structure, the first drawer body.

Alternatively, the accommodating chamber connected with fresh-keeping subspace is provided with the roof of the first drawer cylinder, so that arrangement is rich Oxygen membrane module；At least one first are offered in wall between the accommodating chamber of the first drawer cylinder roof and fresh-keeping subspace to lead to Stomata and at least one second passages opened up with least one first passages interval, are held with being connected in diverse location respectively Receive chamber and fresh-keeping subspace；Refrigerating device also includes blower fan, and blower fan is placed in accommodating chamber, to promote to be formed successively via extremely Lack the first passage, accommodating chamber and at least one second passages and return to the air-flow of fresh-keeping subspace..

Alternatively, the second closed component includes：Second drawer cylinder, with preceding to opening, and is arranged in storage space； Second drawer body, is slidably mounted in the second drawer cylinder, with from the forward direction opening of the second drawer cylinder operationally Outwards extract out and be inwardly inserted into, and the forward direction opening of the end plate of the second drawer body and the second drawer cylinder forms sealing knot Keep-alive subspace is formed in structure, the second drawer body.

Refrigerating device of the present utility model, creatively proposes using oxygen-enriched membrane component that closed fresh-keeping son is empty Oxygen discharge in interior air, so as to obtain atmosphere of the rich nitrogen oxygen deprivation beneficial to food fresh-keeping in fresh-keeping subspace.It is rich The atmosphere of nitrogen oxygen deprivation reduces the intensity of fruit/vegetable aerobic breathing by reducing the content of oxygen in fruits and vegetables shelf space, while Ensure the respiration on basis, prevent fruits and vegetables from carrying out anaerobic respiration, so as to reach the purpose of fruits and vegetables long-period freshness preserving.Meanwhile, it is oxygen-enriched The oxygen that membrane module is separated out feeds to closed keep-alive subspace, and reaching the oxygen concentration of keep-alive subspace can maintain aquatic products More than the 70% of long-term surviving.Therefore oxygen-enriched membrane component can be simultaneously the fresh-keeping subspace of preserving fruit and vegetable utilizing and realize fresh water The keep-alive subspace of product keep-alive provides atmosphere, so as to enrich the food fresh-keeping demand of user.

Further, refrigerating device of the present utility model, can also be by aspiration pump, gas exhaust piping and pumping The working condition of pipeline is adjusted, to maintain the atmosphere of fresh-keeping subspace and keep-alive subspace.

According to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will be more Plus understand of the present utility model above-mentioned and other purposes, advantages and features.

Brief description of the drawings

Describe some specific realities of the present utility model in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter Apply example.Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that What these accompanying drawings were not necessarily drawn to scale.In accompanying drawing：

Fig. 1 is the theory structure schematic diagram of the refrigerating device according to the utility model one embodiment；

Fig. 2 is the casing schematic diagram of the refrigerating device according to the utility model one embodiment；

Fig. 3 is the schematic diagram at another visual angle of structure shown in Fig. 2；

Fig. 4 is a first closed schematic office of component of the refrigerating device according to the utility model one embodiment Portion's structure chart；

Fig. 5 is the schematic, exploded of structure shown in Fig. 4；

Fig. 6 is the exploded view of oxygen-enriched membrane component in refrigerating device according to the utility model one embodiment；

Fig. 7 is the schematic block diagram of the refrigerating device according to the utility model one embodiment；And

Fig. 8 is the pipeline connection diagram of the refrigerating device according to the utility model one embodiment.

Specific embodiment

The refrigerating device of the utility model embodiment is formed in fresh-keeping subspace using controlled atmosphere film and meets article storage The atmosphere put, for example, take oxygen permeable membrane to form the atmosphere of oxygen-enriched poor nitrogen.The operation principle of wherein oxygen permeable membrane is utilization Infiltration rate when each component is through oxygen permeable membrane in air is different, and under pressure differential driving, oxygen is preferentially by richness in making air Oxygen film, in the prior art, oxygen permeable membrane is generally used for preparing oxygen, so as in the field application such as medical treatment, fermentation, burning.At this In utility model embodiment, refrigerating device then discharges oxygen using oxygen permeable membrane so that the oxygen concentration of fresh-keeping subspace Decline, realize the atmosphere preserved beneficial to food.

In the present embodiment, controlled atmosphere technology stores the atmosphere (gas componant of closing space residing for thing by adjusting Ratio or gas pressure) mode extend the technology of shelf life of food products, its general principle is：In certain closing space In (fresh-keeping subspace 271), obtain being different from the atmosphere of normal air constituent by various regulative modes, to suppress to cause The activity of storage thing (usually food) putrid and deteriorated physiological and biochemical procedure and microorganism.Especially, in the present embodiment, institute The controlled atmosphere of discussion is by specifically designed in the controlled atmosphere technology being adjusted to gas component ratio.

Those skilled in the art know that normal air constituent includes (pressing volume percentage, hereafter together)：About 78% Nitrogen, about 21% oxygen, about 0.939% rare gas (helium, neon, argon, krypton, xenon, radon), 0.031% carbon dioxide, with And 0.03% other gases and impurity (for example, ozone, nitric oxide, nitrogen dioxide, vapor etc..In controlled atmosphere field, The fresh-keeping gas atmosphere of rich nitrogen oxygen deprivation is generally obtained by the way of reducing oxygen content using nitrogen-rich gas are filled with to closing space Enclose.Those skilled in the art will be appreciated that nitrogen-rich gas refer to the gas that nitrogen content exceedes nitrogen content in above-mentioned normal air Body, such as nitrogen content therein can be 95%~99%, even more high；And the fresh-keeping atmosphere of rich nitrogen oxygen deprivation refers to nitrogen Content is more than the atmosphere of nitrogen content, oxygen content less than oxygen content in above-mentioned normal air in above-mentioned normal air.

Although there is also controlled atmosphere technology in the prior art, its history can trace back to German biologist's hair in 1821 Existing fruit and vegetable can reduce metabolism in low oxygen level and start.But up to this point, protected due to being conventionally used to controlled atmosphere The fresh equipment of making nitrogen is bulky, with high costs, causes the technology substantially also to be limited to use in various large-scale specialties On storage (typically at least more than 30 tons of storage capacity).Therefore in the prior art one in the small-sized refrigerating equipment such as refrigerator As still use vacuum freshness retaining technology.

In the present embodiment, by above-mentioned oxygen permeable membrane membrane module economically by Air-conditioning system miniaturization, mute, so that suitable For the small-sized refrigerating equipment such as refrigerator, while preserving fruit and vegetable utilizing atmosphere is formed, the oxygen of discharge is made full use of Form keep-alive atmosphere.It is more than the oxygen concentration (needing to reach 70%) higher needed additionally, due to keep-alive subspace, therefore Multiple first closed components can be configured to one or more the second closed component supply oxygen.

In the present embodiment, by above-mentioned oxygen permeable membrane membrane module economically by Air-conditioning system miniaturization, mute, so that suitable For the small-sized refrigerating equipment such as refrigerator, while preserving fruit and vegetable utilizing atmosphere is formed, the oxygen of discharge is made full use of Form keep-alive atmosphere.

Fig. 1 is the theory structure schematic diagram of the refrigerating device according to the utility model one embodiment, and Fig. 2 is basis The schematic diagram of casing 20 of the refrigerating device of the utility model one embodiment, Fig. 3 is the another of structure shown in Fig. 2 The schematic diagram at visual angle.As illustrated, the refrigerating device of the present embodiment may include that casing 20, door body (does not show in figure Go out), oxygen-enriched membrane component 30, aspiration pump 40 and refrigeration system (not shown).Defined in the casing 20 of refrigerating device Storage space, the storage space can be configured to refrigerating chamber 27, refrigerating chamber 25, temperature-changing chamber 26 etc. according to cryogenic temperature.Refrigeration is cold It can be the refrigerator at least with refrigerating chamber 27 and refrigerating chamber 25 to freeze device.Refrigeration system can be common compression refrigerating system or half Conductor refrigeration system etc., it provides cold for example, by direct-cooled and/or air-cooled form to storing compartment, so that storing compartment has Desired preservation temperature.In certain embodiments, the preservation temperature of cold compartment of refrigerator 27 can be 2~9 DEG C, or can be 4~7 ℃；The preservation temperature of refrigerating chamber 25 can be -22~-14 DEG C, or can be -20~16 DEG C.Refrigerating chamber 25 is arranged at refrigerating chamber 27 Lower section, temperature-changing chamber 26 is arranged between refrigerating chamber 25 and refrigerating chamber 27.Temperature range in refrigerating chamber 25 is general at -14 DEG C To -22 DEG C.Temperature-changing chamber 26 can be adjusted according to demand, to store suitable food.

Multiple first closed components 71 and one or more second closed components 72 can be provided with storage space.Wherein Fresh-keeping subspace 271 is defined in each first closed component 71, keep-alive subspace is defined in the second closed component 72 272.First closed component 71 and the second closed component 72 can be arranged in any of the above-described inter-species room, can be arranged in simultaneously same One compartment can also be arranged in it is different between it is indoor.First closed component 71 and the second closed component 72 are arranged in same chamber When, multiple first closed components 71 can also be arranged in interior between same chamber or difference in addition, and above-mentioned multiple first is closed Component 71 can be arranged above and below, it is also possible to laterally be arranged in juxtaposition, when the scheme of the present embodiment is embodied, can be according to refrigeration The space of refrigerating plant and use demand arrangement the first closed component 71 and the second closed component 72.Such as first closed component 71 and second closed component 72 can be arranged above and below and be arranged in refrigerating chamber 27, and for example a part of first closed component 71 can To be arranged in refrigerating chamber 27, and the closed component 71 of another part first can be arranged in temperature-changing chamber 26, and similarly second is close Closing component 72 can also be arranged as required in refrigerating chamber 27 or temperature-changing chamber 26.

Door body may be pivotally mounted to casing 20, be configured to open or close the storage space of the restriction of casing 20.In order to protect The sealing of fresh-keeping subspace 271 and keep-alive subspace 272 is demonstrate,proved, door body inner side is also provided with wicket, to open or close Fresh-keeping subspace 271 and keep-alive subspace 272, so as to form layer door structure.

Refrigeration system can be the cooling cycle system being made up of compressor, condenser, throttling arrangement and evaporator etc..Compression Machine is installed in compressor room 24.Evaporator is configured to directly or indirectly to providing cold in storage space.For example, when this is cold When hiding refrigerating plant for family expenses compression direct cooling refrigerator, evaporator may be disposed at the rear surface outside or inner side of inner bag 21.When this When refrigerating device is family expenses compression wind cooling refrigerator, also there is evaporator room in casing 20, evaporator room passes through wind path system System is connected with storage space, and evaporator is set in evaporator room, and exit is provided with blower fan, is circulated with to storage space Refrigeration.Because such refrigeration system is in itself those skilled in the art known and be easily achieved, in order to not cover and obscuring this The inventive point of application, does not make more repeating in itself to refrigeration system hereinafter.

In certain embodiments, the refrigerating device can also be utilized respectively drawer structure and form above-mentioned first closed group The closed component 72 of part 71 and second.

By taking a first closed component 71 as an example, the drawer structure to form fresh-keeping subspace 271 is introduced.Fig. 4 is root According to a schematic local structural graph of the first closed component 71 of the refrigerating device of the utility model one embodiment, and Fig. 5 is the schematic, exploded of structure shown in Fig. 4, and the drawer for forming the first closed component 71 can have the first drawer cylinder 22 With the first drawer body 23.So as to form fresh-keeping subspace 271 using drawer type storing compartment.First drawer cylinder 22 has preceding To opening, and it is arranged in storage space (such as bottom of refrigerating chamber 27), the first drawer body 23 is slidably mounted on In one drawer cylinder 22, the front end of the first drawer body 23 is provided with end plate, coordinates with the first drawer cylinder 22, can close guarantor The opening of fresh subspace 271.A kind of specific mode is that the first drawer body 23 can be from the forward direction opening of the first drawer cylinder 22 Operationally outwards extract out and be pushed home into.End plate causes the closure of openings of fresh-keeping subspace 271 by sealing structure.

In some embodiments of the present utility model, the opening of the first drawer cylinder 22 can be with the first drawer body 23 Sealing is formed between end plate, the sealing can suitably gas leakage realize air pressure balance.Can lead in some other embodiments Cross and the modes such as millimetre-sized micropore or check valve are set on the first drawer cylinder 22 ensure air pressure balance.

The drawer for forming the second closed component 72 can be using similar structure.Such as second closed component 72 can be wrapped Include：Second drawer cylinder and the second drawer body.Second drawer cylinder, with preceding to opening, and is arranged in storage space；The Two drawer bodies are slidably mounted in the second drawer cylinder, with operationally outside from the forward direction opening of the second drawer cylinder Extract out and be inwardly inserted into, and the forward direction opening of the end plate of the second drawer body and the second drawer cylinder forms sealing structure, the Keep-alive subspace 272 is formed in two drawer bodies.Its difference is that the top for limiting keep-alive subspace 272 is placed without setting The structure of oxygen-enriched membrane component 30.

Oxygen-enriched membrane component 30 may be disposed in the cylinder of the first drawer cylinder 22, be preferably provided at the first drawer cylinder 22 Roof.Specifically the accommodating chamber 31 connected with fresh-keeping subspace 271 is provided with the roof of the first drawer cylinder 22.First takes out At least one first passages are offered in wall between the accommodating chamber 31 of the roof of drawer cylinder 22 and fresh-keeping subspace 271 222 and at least one second passages 223 that open up are spaced with least one first passage 222, with respectively in diverse location Connection accommodating chamber 31 and fresh-keeping subspace 271, accommodating chamber 31 is with fresh-keeping subspace 271 via at least one first intercommunicating pores 222 Connected with least one second intercommunicating pores 223；Oxygen-enriched membrane component 30 is arranged in accommodating chamber 31, can be arranged at least one The top of two intercommunicating pores 223.Accommodating chamber 31 constitutes the cyclic space connected with fresh-keeping subspace 271, so that oxygen-enriched membrane component 30 In oxygen permeable membrane 36 contacted with the gas in fresh-keeping subspace 271.First intercommunicating pore 222 and the second intercommunicating pore 223 are aperture, And quantity can be multiple.In some alternate embodiments, the roof inner side of the first drawer cylinder 22 has recessed groove.It is oxygen-enriched Membrane module 30 is arranged in the recessed groove of the roof of the first drawer cylinder 22.

In some embodiments of the present utility model, in order to promote the gas stream in fresh-keeping subspace 271 and accommodating chamber 31 It is dynamic, blower fan 60 can also be set in the accommodating chamber 31 of the first closed component 71, blower fan 60 is used to be formed successively via at least one First passage, the passage of accommodating chamber 31 and at least one second simultaneously return to the air-flow of the fresh-keeping subspace, so as to promote to protect The gas of fresh subspace 271 enters accommodating chamber 31 via the first intercommunicating pore 222, and the gas in accommodating chamber 31 is connected via second Through hole 223 enters fresh-keeping subspace 271, so as to form the air-flow via oxygen-enriched membrane component 30.

The position that blower fan 60 is placed in accommodating chamber 31 may be at the top of at least one first intercommunicating pores 222, and it promotes to protect The gas of fresh subspace 271 enters accommodating chamber 31 via at least one first intercommunicating pore 222, and passes through the gas in accommodating chamber 31 Fresh-keeping subspace 271 is entered by least one second intercommunicating pore 223, is separated out from by its gas with by oxygen-enriched membrane component 30 Oxygen.

Blower fan 60 preferably uses centrifugal blower, can be arranged in gas collection chamber 31 at first intercommunicating pore 222.Namely Say, centrifugal blower 60 is located at the top of at least one first intercommunicating pores 222, and air inlet is right against the first intercommunicating pore 222.Centrifugation The gas outlet of blower fan 60 can be towards oxygen-enriched membrane component 30.At least one second intercommunicating pores 223 can be located under oxygen-enriched membrane component 30 Side.

The roof of the first drawer cylinder 22 includes lower board unit 224 and ceiling plate portion 225, accommodating chamber 31 is limited jointly, for example The upper surface of lower board unit 224 can form recessed groove, and ceiling plate portion 225 is covered on recessed groove, to form accommodating chamber 31.At least one First intercommunicating pore 222 is arranged at roof front portion, and at least one second intercommunicating pores 223 are arranged at roof rear portion.Centrifugal blower 60 sets The front portion of accommodating chamber 31 is placed in, oxygen-enriched membrane component 30 is arranged at the rear portion of accommodating chamber 31.

Oxygen-enriched membrane component 30 has oxygen permeable membrane 36 and an oxygen rich gas collecting chamber, and oxygen permeable membrane 36 side towards oxygen rich gas Collecting chamber, in pressure of the pressure of oxygen rich gas collecting chamber less than the opposite side of oxygen permeable membrane 36, to make the another of oxygen permeable membrane 36 Oxygen in the air of side enters oxygen rich gas collecting chamber through oxygen permeable membrane 36.Specifically, the oxygen-enriched membrane component 30 can be with company Circulatory flow (the i.e. accommodating chamber 31) contact of fresh-keeping subspace 271 is passed to, so as to can be less than in the pressure of oxygen rich gas collecting chamber During the pressure of fresh-keeping subspace 271, make oxygen in gas in accommodating chamber 31 (from the fresh-keeping subspace 271) relative to Nitrogen in the surrounding space air-flow of oxygen-enriched membrane component 30 more enters oxygen rich gas collecting chamber through oxygen permeable membrane, also will blower fan 60 oxygen formed in air-flow more enter oxygen rich gas collecting chamber relative to nitrogen through oxygen permeable membrane.It is multiple first closed group Part 71 can use the identical structure, specific size can be arranged as required to as identical or different.

Fig. 6 is the exploded view of oxygen-enriched membrane component 30 in refrigerating device according to the utility model one embodiment, rich Oxygen membrane module 30 can be in plate, and the oxygen-enriched membrane component 30 may also include support frame 32.Support frame 32 have be parallel to each other First surface and second surface, be formed with and extend on the first surface respectively, extend on a second surface, and through support To connect multiple gas channels of first surface and second surface, multiple gas channels are collectively forming oxygen rich gas collection to framework Chamber.

Oxygen permeable membrane 36 can be two-layer, and the both sides of support frame 32 are layed in respectively, so that closing oxygen rich gas collecting chamber, often Layer oxygen permeable membrane 36 can be laminated to be formed including one or more oxygen permeable membrane.Gas permeation oxygen permeable membrane film 36 is a mistake for complexity Journey, it is then rich in oxygen permeable membrane 36 through the surface dissolving that mechanism is usually that gas molecule is adsorbed to oxygen permeable membrane 36 first The separation of gas is realized in dissolving with the difference of diffusion coefficient in oxygen film.When gas because the pressure differential of the both sides of oxygen permeable membrane 36 is acted on Under, the fast oxygen of infiltration rate is enriched with the per-meate side of oxygen permeable membrane 36, so as to converge in oxygen rich gas collecting chamber.

Support frame 32 may include frame, the structure such as floor and/or flat board for being arranged in frame, between floor, floor Gas channel can be formed between flat board etc., can open up fluted on the surface of floor, on the surface of flat board, to form air-flow Passage.Floor and/or flat board can improve structural strength of oxygen-enriched membrane component 30 etc..That is, support frame 32 has mutually Parallel first surface and second surface, and it is internally formed the multiple gas channels connected with first surface and second surface. Two oxygen permeable membranes 36 are laid on the first surface and second surface of support frame 32 respectively, with the multiple gas with support frame 32 Closing forms oxygen rich gas collecting chamber to circulation road jointly.

In some embodiments of the present utility model, support frame 32 includes the pumping connected with aforesaid plurality of gas channel Hole 33, is arranged on frame 32, to allow the oxygen in oxygen rich gas collecting chamber to be output.Aspirating hole 33 connects with air extractor 41 It is logical.Oxygen permeable membrane 36 first passes through double faced adhesive tape 34 and is installed on frame, is then sealed by fluid sealant 35.

In certain embodiments, the aforesaid plurality of gas channel that support frame 32 is internally formed can for one or more with The cavity of the connection of aspirating hole 33.In certain embodiments, the aforesaid plurality of gas channel that support frame 32 is internally formed can have There is network.

Specifically, support frame 32 may include frame, the structure such as floor and/or flat board for being arranged in frame, floor it Between, gas channel can be formed between floor and flat board etc., can open up fluted on the surface of floor, on the surface of flat board, with Form gas channel.Floor and/or flat board can improve structural strength of oxygen-enriched membrane component 30 etc..

For example support frame 32 has the first surface and second surface being parallel to each other, and support frame 32 is formed with and exists respectively Extend on first surface, extend on a second surface, and through support frame 32 connecting first surface and second surface Multiple gas channels.That is, the plurality of gas channel include extend on the first surface multiple first gas channels, Multiple second gas channels for extending on second surface and through support frame 32 to connect first surface and second surface Multiple 3rd gas channels.Or it is also understood that support frame 32 is formed with multiple first for extending on the first surface Gas channel and multiple second gas channels for extending on a second surface, and between the first gas channel and the second gas channel Connected by the 3rd gas channel.All of gas channel is collectively forming oxygen rich gas collecting chamber.

One or more oxygen permeable membrane formed two oxygen-enriched film layers of planar shaped, be laid on respectively support frame first surface and On second surface, so as to constitute plate shaped oxygen-enriched membrane component 30.

Support frame 32 is formed with the aspirating hole 33 with said flow channel connection, and the connection oxygen rich gas of aspirating hole 33 is collected Chamber, for connecting the entrance point of aspiration pump 40, so as to allow the oxygen rich gas in oxygen rich gas collecting chamber to be output.In aspiration pump During 40 operation, negative pressure state is in oxygen rich gas collecting chamber 38, the oxygen in the outside air of oxygen-enriched membrane component 30 can continue Oxygen permeable membrane 36 is crossed to enter in oxygen rich gas collecting chamber.Support frame 32 on the whole can generally rectangular shaped framework.

In certain embodiments, support frame 32 may include：Frame, multiple first floors and multiple second floors.Before State multiple first floors inside frame it is longitudinally spaced setting and extend transversely, and aforesaid plurality of first floor side table Face forms first surface.Multiple second floors aforesaid plurality of first floor the laterally spaced setting of another side surface and along vertical Second surface is formed to the side surface away from the first floor of extension, and aforesaid plurality of second floor.That is, foregoing many Individual second floor is arranged on a side surface of aforesaid plurality of first floor.Aforesaid plurality of first floor and aforesaid plurality of second rib The opposite surface of plate forms first surface and second surface respectively；That is, aforesaid plurality of first floor and aforesaid plurality of second floor Opposite surface forms first surface；Aforesaid plurality of second floor and the opposite surface of aforesaid plurality of first floor form the second table Face.Between between the second floor between the first adjacent floor, adjacent and between the first adjacent floor and the second floor Gap forms aforesaid plurality of gas channel.Wherein, the gap between two the first adjacent floors forms and extends on the first surface The first gas channel, gap between two the second adjacent floors forms the second air-flow for extending on a second surface and leads to Road, the gap between the first adjacent floor and the second floor forms and connects first surface and second surface through support frame 32 The 3rd gas channel.That is, the chi structure for being formed by all first floors and all second floors forms aforesaid plurality of air-flow Passage.

Above-mentioned support frame 32 inside its frame by setting multiple first ribs that are longitudinally spaced and extending transversely Plate and aforesaid plurality of first floor a side surface is laterally spaced and multiple second floors for extending longitudinally so that a side Face ensure that the continuity of gas channel, on the other hand greatly reduce the volume of support frame, and significantly enhance branch The intensity of support frame frame 32.Additionally, the said structure of support frame 32 ensure that oxygen permeable membrane 36 is obtained in that enough supports, even if Preferable flatness can be also remained in the case where oxygen rich gas collecting chamber internal negative pressure is larger, it is ensured that oxygen permeable membrane group The service life of part 30.

Aspirating hole 33 can be arranged at the horizontal side of frame in the longitudinal middle part of frame.So set equivalent to from oxygen permeable membrane The middle part pumping of component 30, is conducive to oxygen permeable membrane 36 uniformly ventilative.Aspirating hole 33 can be stepped hole shoulder hole in other words, with it When being connected with aspiration pump 40 by flexible pipe, it is ensured that the air-tightness of connecting portion.

Additionally, the said structure of support frame 32 ensure that oxygen permeable membrane 36 is obtained in that enough supports, even if oxygen-enriched Preferable flatness can be also remained in the case that gas collection chamber internal negative pressure is larger, it is ensured that oxygen-enriched membrane component 30 Service life.

The inlet end of aspiration pump 40 connects aspirating hole 33 respectively via exhaust pipe 51, multiple first closed group to be communicated to The oxygen rich gas collecting chamber of the oxygen-enriched membrane component 30 in part 71, and be configured to outwards extract the gas of oxygen rich gas collecting chamber out, So that the oxygen content in fresh-keeping subspace 271 is constantly reduced, it is beneficial to so as to form rich nitrogen oxygen deprivation in fresh-keeping subspace 271 The atmosphere of food fresh-keeping.Aspiration pump 40 can be arranged in compressor room 24, can make full use of the space of compressor room 24, no Additionally take elsewhere, therefore the additional volumes of refrigerating device will not be increased, the structure of refrigerating device can be made tight Gather.

In some embodiments of the present utility model, aspiration pump 40 and compressor can be respectively arranged at compressor room 24 Both sides, are spaced, so that the distance of the Range compress machine of aspiration pump 40 is distant, reduce noise superposition and used heat superposition.For example, Aspiration pump 40 may be disposed at one end that door body pivots side of closing on of compressor room 24.When refrigerating device is side by side combination refrigerator When, aspiration pump 40 may be disposed at the optional position of compressor room 24.In other embodiments of the present utility model, aspiration pump 40 Can also be set adjacent to compressor, such as aspiration pump 40 is arranged at one end of compressor room 24, and in compressor and compressor Between the side wall in cabin 24.

In some embodiments of the present utility model, aspiration pump 40 can be installed in seal box, and seal box can be by peace Dress base plate is installed in compressor room 24.The noise and/or used heat that seal box can largely intercept aspiration pump 40 are outside Propagate.

The oxygen that aspiration pump 40 is extracted out is used to be supplied to the keep-alive subspace 272 of the second closed component 72.Keep-alive subspace 272 outlet sides that aspiration pump 40 is communicated to via gas exhaust piping 52, to receive the gas from oxygen rich gas collecting chamber, so that Keep-alive subspace 272 forms oxygen concentration higher than 70% beneficial to the atmosphere of fresh keep-alive.

Exhaust pipe 51 and gas exhaust piping 52 can be embedded in the foaming layer of refrigerating device respectively, in refrigerating In the case that device is wind cooling refrigerator, exhaust pipe 51 and gas exhaust piping 52 can also be arranged in air channel.

Fig. 7 is the schematic block diagram of the refrigerating device according to the utility model one embodiment, and Fig. 8 is The pipeline connection diagram of the refrigerating device according to the utility model one embodiment.It is fresh-keeping after the operation of aspiration pump 40 Oxygen in subspace 271 is discharged into keep-alive subspace 272 by oxygen-enriched membrane component 30 by aspiration pump 40, in fresh-keeping subspace While the fresh-keeping atmosphere of 271 formation rich nitrogen oxygen deprivation keep-alive atmosphere is formed in keep-alive subspace 272.Need explanation It is that the start and stop of the start and stop of aspiration pump 40 typically with blower fan 60 are synchronous, namely start in oxygen rich gas collecting chamber shape in aspiration pump 40 In the case of negative pressure, blower fan 60 makes the gas of fresh-keeping subspace 271 that air-flow is formed in accommodating chamber 31 simultaneously.

The fruits and vegetables of storage are needed more than the oxygen needed in keep-alive aquatic products, and keep-alive subspace in view of general user At concentrations up to 70%, it is therefore possible to use a 71 pairs of second closed component 72 supply oxygen of multiple first closed components；Also may be used With using the closed supply of component 72 oxygen of multiple first closed component, 71 pairs of multiples second, the quantity of the second closed component 72 can be with Less than the quantity of the first closed component 71, the overall volume of fresh-keeping subspace can also be more than the overall appearance of keep-alive subspace in addition Product.

In addition to making to form the process control of atmosphere, and ensure the first closed component 71 and the second closed component 72 sealing, refrigerating device is additionally provided with the first valve module 151 and the second valve module 152.Wherein the first valve module 151 It is arranged in exhaust pipe 51, is configured to the on off operating mode of bleeding regulating pump 40 and multiple first closed components 71；Second valve group Part 152 is arranged in gas exhaust piping 52, is configured to the on off operating mode of bleeding regulating pump and the second closed component.

When aspiration pump 40 is closed, the first valve module 151 and the second valve module 152 are turned off, to ensure first closed group The sealing of the closed component 72 of part 71 and second.After the startup of aspiration pump 40, the first valve module 151 makes aspiration pump 40 be taken out with needs The the first closed component 71 for taking oxygen is connected, and the second valve module 152 makes aspiration pump 40 and needs to supply the second closed of oxygen Component 72 is connected.

For example, the first valve module 151 includes multiple air inlets and a gas outlet, each air inlet of the first valve module 151 Mouth is respectively communicated to an oxygen rich gas collecting chamber for the first closed component 71, and the gas outlet of the first valve module 151 is communicated to takes out The inlet end of air pump 40, and multiple air inlets of the first valve module 151 and a gas outlet controllably carry out break-make respectively, from And change the on off operating mode of aspiration pump 40 and multiple first closed components 71.

In the case where the second closed component 72 is for multiple, the second valve module 152 can include multiple gas outlets and one Air inlet, the air inlet of the second valve module 152 is communicated to the outlet side of aspiration pump 40, each gas outlet of the second valve module 152 A second closed component 72 is respectively communicated to, and multiple gas outlets of the second valve module 152 and an air inlet are received respectively Break-make is carried out to control, so as to change the on off operating mode of aspiration pump 40 and multiple second closed components 72.

The valve module 152 of above-mentioned first valve module 151 and second can be spliced to form by multiple independent magnetic valves, by controlling Device is controlled to realize that above-mentioned break-make is controlled respectively to multiple magnetic valves.

The refrigerating device of the present embodiment is also provided with：First gas detection means 281 and second gas are detected Device 282.Wherein first gas detection means 281 is arranged in each fresh-keeping subspace 271 of the first closed component 71, and is configured Into the atmosphere index detected in fresh-keeping subspace 271.Second gas detection means 282 is arranged in keep-alive subspace 272, And be configured to detect the atmosphere index in keep-alive subspace 272；And aspiration pump 40 is configured to be examined according to first gas The testing result for surveying device 281 and second gas detection means 282 is turned on and off, and correspondingly the first valve module 151 can be with According to the atmosphere index bleeding regulating pump 40 in fresh-keeping subspace 271 and the on off operating mode of multiple first closed components 71； And the second valve module 152 can also be according to the atmosphere index bleeding regulating pump 40 in keep-alive subspace 272 and multiple the The on off operating mode of two closed components 72.

Above-mentioned gas atmosphere index mainly includes oxygen concentration, first gas detection means 281 and second gas detection dress Putting 282 can include respectively：Oxygen concentration sensor.Oxygen concentration sensor can select diaphragm type galvanic electricity pool, electricity Polytype oxygen concentration sensors such as chemistry, catalysis burning, constant potential electrolytic, in some alternative embodiments, the One gas-detecting device 281 and second gas detection means 282 can also use gas analyzer, for measuring the gas in it Content, including oxygen content, it is also possible to including nitrogen content, carbon dioxide content etc..Each first closed component 71 can be equal Setting can be respectively provided with a second gas detection dress in a first gas detection means 281 and each second closed component 72 Put 282.

Aspiration pump 40 can set different rotating speeds according to the quantity for opening the first closed component 71 and the second closed component 7, The quantity of the first closed component 71 and the second closed component 7 is more, and rotating speed is higher.

A kind of control process of aspiration pump 40 can be：Collection first gas detection means 281 and second gas detection dress The oxygen concentration of 282 detections is put, the oxygen concentration in fresh-keeping subspace 271 exceeds default fresh-keeping scope or keep-alive subspace When 272 oxygen concentration is less than default keep-alive scope, aspiration pump 40 starts, and the oxygen of fresh-keeping subspace 271 is arranged to keep-alive Subspace 272.And maintain the oxygen of fresh-keeping scope or keep-alive subspace 272 in the oxygen concentration in fresh-keeping subspace 271 When gas concentration exceeds default keep-alive scope, aspiration pump 40 is closed.

The quantity of the first closed component 71 and the second closed component 7 in Fig. 7 and Fig. 8 by way of example only, in actual reality Shi Shi, can as needed configure the quantity of the first closed component 71 and the second closed component 72.Below with close with n individual first Close as a example by component 71 and the m refrigerating device of the second closed component 72, introduction carries out the several optional mode of controlled atmosphere：

Mode one：First valve module 151 connects the inlet end of n the first closed component 71 and aspiration pump 40 simultaneously, while Second valve module 152 connects the exhaust end of m the second closed component 72 and aspiration pump 40 simultaneously, and aspiration pump 40 is simultaneously at n the The atmosphere that rich nitrogen oxygen deprivation is beneficial to food fresh-keeping is manufactured into one closed component 71, and in m the second closed component 72 Interior manufacture oxygen concentration is higher than 70% beneficial to the atmosphere of fresh keep-alive.In the process, it is ensured that aspiration pump 40 is equably taken out Take the oxygen in n the first closed components 71, and equably supply to m the second closed component 72.

Default preservation condition is reduced in the oxygen concentration of all n the first closed components 71 and m individual second is closed When the oxygen concentration of component 72 is increased to 70% or more, the first valve module 151, the second valve module 152, aspiration pump 40 are closed simultaneously Close.

Mode two：After the startup of aspiration pump 40, the first valve module 151 is sequentially communicated each first closed component 71 and aspiration pump 40 inlet end, oxygen concentration of the aspiration pump 40 first fresh-keeping subspace 271 of the first closed component 71 is reduced to default Preservation condition after, the first valve module 151 connects second the first closed component 71 and the inlet end of aspiration pump 40, enters successively OK, synchronization only has a first closed component 71 and is connected with the inlet end of aspiration pump 40, until all n first closed group The oxygen concentration of the fresh-keeping subspace 271 of part 71 is reduced to default preservation condition.

Mode three：After the startup of aspiration pump 40, the second valve module 152 is sequentially communicated each second closed component 72 and aspiration pump 40 exhaust end, oxygen concentration of the aspiration pump 40 first keep-alive subspace 272 of the second closed component 72 brings up to 70% After above, the second valve module 152 connects second the second closed component 72 and the exhaust end of aspiration pump 40, carries out successively, same Moment only has a second closed component 72 and is connected with the exhaust end of aspiration pump 40, until the individual second closed components 72 of all m The oxygen concentration of fresh-keeping subspace 272 brings up to more than 70% keep-alive condition.

Mode four：The oxygen concentration of the detection of Real-time Collection first gas detection means 281, in n the first closed component 71 In after any one oxygen concentration improves, the first closed component 71 that the oxygen concentration that the first valve module 151 connects is improved and pumping Pump 40, makes aspiration pump 40 extract the oxygen of the fresh-keeping subspace 271 of the first closed component 71.

Mode five：The oxygen concentration of the detection of Real-time Collection second gas detection means 282, in m the second closed component 71 In after the reduction of any one oxygen concentration, the second valve module 152 connects the second closed component 72 and the pumping of oxygen concentration reduction Pump 40, makes aspiration pump 40 provide oxygen to the second closed component 72.

The controlled atmosphere control method of above several ways, can flexibly select to use, it is possible to flexible according to fresh-keeping requirement It is applied in combination.

In addition, specific oxygen concentration range can basis during above-mentioned rich nitrogen oxygen deprivation is beneficial to the atmosphere of food fresh-keeping The food species placed in fresh-keeping subspace 271 are determined.By the research to food fresh-keeping characteristic, inventor has found oxygen Oxidation, respiration with fruits and vegetables is closely related, and not oxygen concentration is lower, is more conducive to the fresh-keeping preservation of fruits and vegetables, Too low oxygen content also results in food and the situation of anaerobic respiration occurs, also results in food spoilage.Therefore every kind of fruits and vegetables can Can there is optimal oxygen concentration range, therefore after user places fruits and vegetables in fresh-keeping subspace 271, fruits and vegetables type can be set Or fruits and vegetables type is automatically identified by fridge-freezer, so as to the oxygen maintained to should determine that fresh-keeping subspace 271 to need Concentration range.

The oxygen concentration requirement of multiple first closed components 71 could be arranged to identical, it is also possible to be set to difference, specifically It is determined according to its food species deposited.

The refrigerating device of the present embodiment, creatively proposes and uses oxygen-enriched membrane component by closed fresh-keeping subspace Oxygen in 271 in air is arranged to keep-alive subspace 272, so as to obtain the oxygen deprivation of rich nitrogen in the fresh-keeping subspace 271 beneficial to food The fresh-keeping atmosphere of thing.The atmosphere of rich nitrogen oxygen deprivation reduces fruits and vegetables by reducing the content of oxygen in fruits and vegetables shelf space The intensity of aerobic respiration, while ensureing the respiration on basis, prevents fruits and vegetables from carrying out anaerobic respiration, is protected for a long time so as to reach fruits and vegetables Fresh purpose.Meanwhile, the oxygen that oxygen-enriched membrane component 30 is separated out feeds to closed keep-alive subspace 272, makes keep-alive subspace 272 Oxygen concentration reaches can maintain more than the 70% of aquatic products long-term surviving.Therefore oxygen-enriched membrane component 30 can simultaneously for fruits and vegetables are protected Fresh fresh-keeping subspace 271 and realize that the keep-alive subspace 272 of fresh aquatic product keep-alive provides atmosphere, so as to enrich The food fresh-keeping demand of user.

Further, refrigerating device of the present utility model, can also by aspiration pump 40, gas exhaust piping 51 and The working condition of exhaust pipe 52 is adjusted, to maintain the atmosphere of fresh-keeping subspace 271 and keep-alive subspace 272.

So far, although those skilled in the art will appreciate that herein it is detailed have shown and described it is of the present utility model many Individual exemplary embodiment, but, in the case where the utility model spirit and scope are not departed from, still can be public according to the utility model The content opened directly determines or derives many other variations or modifications for meeting the utility model principle.Therefore, this practicality is new The scope of type is understood that and regards as covering all these other variations or modifications.

Claims (10)

1. a kind of refrigerating device, it is characterised in that including：

Casing, storage space is defined in it；

Multiple first closed components, are arranged in the storage space, and guarantor is defined respectively in the multiple first closed component Fresh subspace；

Oxygen-enriched membrane component is respectively arranged with each described first closed component, oxygen permeable membrane is provided with the oxygen-enriched membrane component, The surrounding space of the oxygen-enriched membrane component is connected with the fresh-keeping subspace, and oxygen rich gas receipts are formed with the oxygen-enriched membrane component Collection chamber；

Aspiration pump, its inlet end is collected via the oxygen rich gas that exhaust pipe is respectively communicated to the multiple first closed component Chamber, and be configured to outwards extract the gas of the oxygen rich gas collecting chamber out, so that the multiple first closed component is fresh-keeping At least part of oxygen in subspace enters the oxygen rich gas collecting chamber by the oxygen permeable membrane, so as to reduce the multiple the Oxygen concentration in the fresh-keeping subspace of one closed component；

One or more second closed components, are also disposed in the storage space, and keep-alive subspace, the guarantor are defined in it Subspace living is respectively communicated to the outlet side of the aspiration pump via gas exhaust piping, and the oxygen rich gas collecting chamber is come to receive Gas, so as to the keep-alive subspace formed oxygen concentration higher than 70% beneficial to fresh keep-alive atmosphere.

2. refrigerating device according to claim 1, it is characterised in that also include：

First valve module, is arranged in the exhaust pipe, and is configured to adjust the aspiration pump closed with the multiple first The on off operating mode of component；

Second valve module, is arranged in the gas exhaust piping, and is configured to adjust the aspiration pump with the described second closed component On off operating mode.

3. refrigerating device according to claim 2, it is characterised in that

First valve module includes multiple air inlets and a gas outlet, and each air inlet of first valve module connects respectively An oxygen rich gas collecting chamber for the first closed component is passed to, the gas outlet of first valve module is communicated to the pumping The inlet end of pump, and multiple air inlets of first valve module and a gas outlet controllably carry out break-make respectively, so that Change the on off operating mode of the aspiration pump and the multiple first closed component.

4. refrigerating device according to claim 2, it is characterised in that

The second closed component is multiple, and

Second valve module includes multiple gas outlets and an air inlet, and the air inlet of second valve module is communicated to described The outlet side of aspiration pump, each gas outlet of second valve module is respectively communicated to a second closed component, and Multiple gas outlets of second valve module and an air inlet controllably carry out break-make respectively, thus change the aspiration pump with The on off operating mode of the multiple second closed component.

5. refrigerating device according to claim 2, it is characterised in that also include：

First gas detection means, is arranged in the fresh-keeping subspace, and is configured to the gas in the detection fresh-keeping subspace Body atmosphere index；

Second gas detection means, is arranged in the keep-alive subspace, and is configured to detect the gas in the keep-alive subspace Body atmosphere index；And

The aspiration pump is configured to the detection knot according to the first gas detection means and the second gas detection means Fruit is turned on and off.

6. refrigerating device according to claim 5, it is characterised in that

First valve module be configured to according to the atmosphere index in the fresh-keeping subspace adjust the aspiration pump with The on off operating mode of the multiple first closed component；And

Second valve module, be configured to according to the atmosphere index in the keep-alive subspace adjust the aspiration pump with The on off operating mode of the multiple second closed component.

7. refrigerating device according to claim 1, it is characterised in that

The aspiration pump is arranged in the compressor room of the refrigerating device, and the exhaust pipe and the blast pipe Road is embedded in the foaming layer of the refrigerating device respectively.

8. refrigerating device according to claim 1, wherein each described first closed component includes respectively：

First drawer cylinder, with preceding to opening, and is arranged in the storage space；

First drawer body, is slidably mounted in the first drawer cylinder, with from the forward direction of the first drawer cylinder Opening is operationally outwards extracted out and is inwardly inserted into, and the end plate of first drawer body and the first drawer cylinder Forward direction opening forms and the fresh-keeping subspace is formed in sealing structure, first drawer body.

9. refrigerating device according to claim 8, it is characterised in that

The accommodating chamber connected with the fresh-keeping subspace is provided with the roof of the first drawer cylinder, for arranging the richness Oxygen membrane module；Offered in wall between the accommodating chamber of the first drawer cylinder roof and the fresh-keeping subspace to Few first passage and at least one second passages opened up with the first passage interval described at least one, with respectively The accommodating chamber and the fresh-keeping subspace are connected in diverse location；

The refrigerating device also includes blower fan, and the blower fan is placed in the accommodating chamber, to promote to be formed successively via institute State at least one first passages, the accommodating chamber and at least one second passage and return to the fresh-keeping subspace Air-flow.

10. refrigerating device according to claim 1, it is characterised in that the second closed component includes：

Second drawer cylinder, with preceding to opening, and is arranged in the storage space；

Second drawer body, is slidably mounted in the second drawer cylinder, with from the forward direction of the second drawer cylinder Opening is operationally outwards extracted out and is inwardly inserted into, and the end plate of second drawer body and the second drawer cylinder Forward direction opening forms and the keep-alive subspace is formed in sealing structure, second drawer body.