CN206959178U - Constant humidity machine and showcase - Google Patents
Constant humidity machine and showcase Download PDFInfo
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- CN206959178U CN206959178U CN201720339057.3U CN201720339057U CN206959178U CN 206959178 U CN206959178 U CN 206959178U CN 201720339057 U CN201720339057 U CN 201720339057U CN 206959178 U CN206959178 U CN 206959178U
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- humidity
- housing
- regulation room
- constant humidity
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Abstract
The utility model provides a kind of constant humidity machine and showcase.Wherein, constant humidity machine includes housing and humidity regulation room.The first air inlet and the first gas outlet are offered on housing.Humidity regulation room is placed in housing, and the second air inlet and the second gas outlet are offered on humidity regulation room.Electrolytic element, the first pole-face and the air contact in humidity regulation room of electrolytic element, the second pole-face and the air contact in housing of electrolytic element, humidity of the electrolytic element for adjusting humidity regulation room air are installed on the wall of humidity regulation room.Relatively independent humidity regulation room is placed in housing, each wall contacted with housing interior air-flow of humidity regulation room can set electrolytic element, can thus improve the operating efficiency of constant humidity machine.Also, the air in housing is circulated by the first air inlet and the first gas outlet, humidity regulation room can also be radiated, it helps the gas circulation around humidity regulation room.
Description
Technical field
Article Techniques of preserving field is the utility model is related to, in particular to a kind of constant humidity machine and showcase.
Background technology
In terms of article preservation, such as valuable historical relic, medicine etc. all can have strict demand to the humidity of Conservation environment, close
Suitable humidity preserves important effect to the long-term of article.In general constant humidity machine or environment air-conditioner, it is to pass through drier
Or the dehumidifying of humidity adsorption film, humidified using water atomization is added.Need irregularly to change drier or wet using above-mentioned constant humidity machine
Adsorbed film is spent, is also required to add water again in water shortage.The constant humidity machine is cumbersome, is easily made because the carelessness of staff is forgotten
Into environment Quality Down.In addition, the water in constant humidity machine be chronically at it is apt to deteriorate in confined space, on the contrary easily pollution confined air
Interior environment.
Under normal circumstances, above-mentioned constant humidity machine, which can be all arranged on, preserves in the confined space of article place.Each replacing drying
Agent and add water can all cause article to be exposed to exterior space, can so be unfavorable for the preservation of article.Meanwhile above-mentioned constant humidity machine exists
There can be certain noise during work, and noise is also one kind of vibration energy, therefore the article that can be also preserved to needs causes
Harmful effect.
The application documents of Application No. 211610082912.9 disclose a kind of constant humidity machine, by using the electricity of electrolytic element
Solution reaction the air in showcase is dehumidified and humidified, solve traditional constant humidity machine need when in use change drier and
The problem of adding water.However, because the reasons in structure of the constant humidity machine causes the operating efficiency of constant humidity machine relatively low and is unfavorable for radiating.
Utility model content
Main purpose of the present utility model is to provide a kind of constant humidity machine and showcase, to solve constant humidity machine in the prior art
Ineffective problem.
To achieve these goals, according to one side of the present utility model, there is provided a kind of constant humidity machine, including housing and
Humidity regulation room.The first air inlet and the first gas outlet are offered on housing, the first air inlet and the first gas outlet are used for shell
Internal air connects with external environment.Humidity regulation room is placed in housing, offered on humidity regulation room the second air inlet and
Second gas outlet, the second air inlet and the second gas outlet are used to the air in humidity regulation room with interior environment being connected.Wherein,
Electrolytic element is installed on the wall of humidity regulation room, the first pole-face and the air contact in humidity regulation room of electrolytic element,
Second pole-face of electrolytic element and the air contact in housing, electrolytic element are used for the humidity for adjusting humidity regulation room air.
Further, electrolytic element is multiple that the wall of humidity regulation room is multiple, and multiple electrolytic elements are separately positioned on
On multiple walls of humidity regulation room.
Further, electrolytic element is two, and two electrolytic elements are separately positioned on the wall relative with the first air inlet
On the upper and wall relative with the first gas outlet.
Further, humidity regulation room is connected with the inwall of housing, the side wall shape being connected with humidity regulation room of housing
Into a wall of humidity regulation room, the second air inlet and the second gas outlet, which are opened on housing, corresponds to humidity regulation room
In side wall.
Further, the bottom of humidity regulation room and the bottom wall of housing are set at intervals.
Further, constant humidity machine also includes control element, and control element is arranged on the inwall of housing.
Further, constant humidity machine also includes dc source, and dc source is arranged in housing, dc source respectively with electrolysis
Element and control element electrical connection.
Further, the first air inlet and the first gas outlet are opened in two side walls relative on housing respectively.
Further, constant humidity machine also includes humidity sensor, and humidity sensor electrically connects with control element, and control element obtains
The ambient humidity information that humidity sensor detects is taken to control the work of electrolytic element.
Further, constant humidity machine also includes display, and display electrically connects with control element.
Further, constant humidity machine also includes communication device, and communication device electrically connects with control element, and communication device is used to connect
Receive the job information of control element and send job information, communication device is additionally operable to receive instruction to be transferred to control element.
To achieve these goals, according to one side of the present utility model, a kind of showcase is additionally provided, is set persevering
Wet machine, constant humidity machine are above-mentioned constant humidity machine.
Using the technical solution of the utility model, at work, direct current is fed to the porous of electrolytic element to electrolytic element
Electrolytic film on, the both sides of electrolytic film form anode and negative electrode respectively, and the hydrone in a space is separated into hydrogen in anode-side
Ion and oxygen, hydrogen ion reaches cathode side through electrolytic film, and is reacted with the air in another space and generate hydrone.
Based on this principle, then by changing the energization direction of electrolytic element, you can the air humidity in humidity regulation room is adjusted
Section, and then adjust the air humidity in the showcase being connected with humidity regulation room.Relatively independent humidity regulation room is placed
In housing, each wall contacted with housing interior air-flow of humidity regulation room can set electrolytic element, thus
The operating efficiency of constant humidity machine can be improved.On the other hand, by the first air inlet on housing and the first gas outlet in housing
Air circulated, humidity regulation room can also be radiated, it helps the circulation of gas around humidity regulation room.
In addition to objects, features and advantages described above, the utility model also has other purposes, feature and excellent
Point.Below with reference to accompanying drawings, the utility model is described in further detail.
Brief description of the drawings
A part of Figure of description of the present utility model is formed to be used for providing further understanding to of the present utility model, this
The schematic description and description of utility model is used to explain the utility model, does not form to improper limit of the present utility model
It is fixed.In the accompanying drawings：
Fig. 1 shows the structural representation of the embodiment according to the constant humidity machine of the present utility model for not taking lid；
Fig. 2 shows the schematic top plan view of the constant humidity machine in Fig. 1；
Fig. 3 shows the schematic front view of the constant humidity machine in Fig. 1；
Fig. 4 shows the left view schematic diagram of the constant humidity machine in Fig. 1；
Fig. 5 shows that the right side of the constant humidity machine in Fig. 1 regards schematic diagram；
Fig. 6 shows the schematic rear view of the constant humidity machine in Fig. 1.
Wherein, above-mentioned accompanying drawing marks including the following drawings：
10th, housing；20th, humidity regulation room；21st, electrolytic element；11st, the first air inlet；12nd, the first gas outlet；22nd, second
Air inlet；23rd, the second gas outlet；30th, control element；40th, dc source；50th, display.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order that those skilled in the art more fully understand the utility model, it is real below in conjunction with the utility model
The accompanying drawing in example is applied, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that be described
Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all should
When the scope for belonging to the utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so
The term used can exchange in the appropriate case, so as to embodiment of the present utility model described herein.In addition, term " bag
Include " and " having " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing series of steps
Or process, method, system, product or the equipment of unit are not necessarily limited to those steps or the unit clearly listed, but can wrap
Include not listing clearly or for the intrinsic other steps of these processes, method, product or equipment or unit.
Fig. 1 to Fig. 6 shows the structure of the embodiment of constant humidity machine of the present utility model, and the constant humidity machine includes housing 10 and wet
Regulation room 20 is spent, the first air inlet 11 and the first gas outlet 12, the first air inlet 11 and the first gas outlet are offered on housing 10
12 are used to connect the air in housing 10 with external environment.Humidity regulation room 20 is placed in housing 10, on humidity regulation room 20
The second air inlet 22 and the second gas outlet 23 are offered, the second air inlet 22 and the second gas outlet 23 are used for the humidity regulation
Air in room 20 is connected with interior environment.Electrolytic element 21 is installed on the wall of humidity regulation room 20, electrolytic element 21
First pole-face and the air contact in humidity regulation room 20, the second pole-face and the air contact in housing 10 of electrolytic element 21,
Electrolytic element 21 is used for the humidity for adjusting air in humidity regulation room 20.
At work, direct current is fed in electrolytic element 21 electrolytic element 21, two pole-faces difference of electrolytic element 21
Form anode and negative electrode, the hydrone in a space is separated into hydrogen ion and oxygen in anode-side, and hydrogen ion passes through electrolytic film
Cathode side is reached, and is reacted with the air in another space and generates hydrone.Based on this principle, by changing electrolysis member
The energization direction of part 21, you can be adjusted, and then adjust and humidity regulation room 20 to the air humidity in humidity regulation room 20
The air humidity in showcase being connected.Relatively independent humidity regulation room 20 is placed in housing 10, humidity regulation room
The wall that each of 20 is contacted with the interior air-flow of housing 10 can set electrolytic element 21, can thus improve constant humidity machine
Operating efficiency.On the other hand, by the first air inlet 11 on housing 10 and the first gas outlet 12 to the air in housing 10
Circulated, humidity regulation room 20 can also be radiated, it helps the gas circulation around humidity regulation room 20.It is optional
, electrolytic element 21 is porous electrolytic film, according to the difference in energization direction, the both sides of electrolytic film be optionally formed anode and
Negative electrode, so as to which humidity regulation room 20 is humidified or dehumidified, and then play the displaying that regulation is connected with humidity regulation room 20
The purpose of air humidity in cabinet.
It should be noted that " interior environment " here refers mainly to need the space for adjusting its air humidity.For example, when needs
When adjusting the air humidity in showcase, the space in showcase is " interior environment ", and the space beyond showcase just forms " outer shroud
Border ".
Optionally, in order to improve the operating efficiency of constant humidity machine, electrolytic element 21 is multiple, and the wall of humidity regulation room 20 is
Multiple, multiple electrolytic elements 21 are separately positioned on multiple walls of humidity regulation room 20.Multiple electrolytic elements 21 are operated,
Further help in the operating efficiency for improving constant humidity machine.Optionally, will can also make in turn between multiple electrolytic elements 21
With to extend the service life of electrolytic element 21.
As an alternative embodiment, in the present embodiment, as depicted in figs. 1 and 2, electrolytic element 21 is two,
One is arranged on the wall relative with the first air inlet 11 of humidity regulation room 20, and another is arranged on and the first gas outlet 12
On relative wall.The air of external environment can be so caused fully to be contacted with electrolytic element 21 after entering in housing 10, so as to
The electrolytic efficiency of electrolytic element 21 is improved, further improves the operating efficiency of constant humidity machine.Optionally, two of humidity regulation room 20
The wall for being provided with electrolytic element 21 is the dividing plate for being provided with mounting hole, and electrolytic element 21 is arranged on mounting hole, it is ensured that electrolytic film
Side and housing 10 in air contact, opposite side and the air contact in humidity regulation room 20.
As another optional embodiment, humidity regulation room 20 can be cuboid-type, and relative will can be electrolysed
Element 21 is arranged to four, and four electrolytic elements 21 can be separately positioned on four perisporiums of the humidity regulation room 20 of cuboid-type
On.
In the technical scheme of the present embodiment, humidity regulation room 20 is connected with the inwall of housing 10, housing 10 with it is wet
The wall that the connected side wall of regulation room 20 forms humidity regulation room 20 is spent, the second air inlet 22 and the second gas outlet 23 open up
In the side wall corresponding to humidity regulation room 20 on the housing 10.
As an alternative embodiment, the wall of humidity regulation room 20 and the side wall of housing 10 can be also set to be spaced and set
Put, two are offered in the relative side wall of the wall with offering the second air inlet 22 and the second gas outlet 23 in housing 10
Via, two vias are corresponding with the second air inlet 22 and the second gas outlet 23 respectively, the second air inlet 22 and the second gas outlet 23
On can distinguish connecting conduit, conduit is through via and interior environmental communication.
Optionally, the setting of the bottom wall of the bottom of humidity regulation room 20 and housing 10 separately.By by humidity regulation room
20 bottom and the setting of the bottom wall of housing 10 separately, make to reserve between the bottom wall of housing 10 and the bottom of humidity regulation room 20
Go out space, can so increase sphere of circulation of the air-flow in housing 10.
Optionally, constant humidity machine also includes control element 30.Fig. 2 shows the top view for the constant humidity machine for not taking lid.For
Control element 30 is clearly showed that, is also not shown the upper wall surface and lower wall surface of humidity regulation room 20 in Fig. 2.Can from Fig. 2
Going out, control element 30 is arranged on the bottom wall of housing 10, and positioned at the lower section of humidity regulation room 20.Control element 30 and electrolysis member
Part 21 electrically connects.The automatic running of constant humidity machine can be realized by control element 30, the humidity requirement such as in showcase is cut
The energization direction of electrolytic element 21 is changed, is humidified or is dehumidified, it is easy to use.
Dc source 40 is additionally provided with housing 10, dc source 40 is electrically connected with electrolytic element 21 and control element 30 respectively
Connect.In the present embodiment, the first air inlet 11 and the first gas outlet 12 are opened up in two relative on the housing 10 side walls.Outer shroud
Air in border enters housing 10 from the first air inlet 11, then during discharging external environment from the first gas outlet 12, flowing
Air can be full of whole housing 10, so as to be advantageous to take away the heat of control element 30 and dc source 40, contribute to constant humidity
Machine radiates.
Optionally, the first supply fan is provided with the first air inlet 11, the first outlet is provided with the first gas outlet 12
Fan, the second supply fan is provided with the second air inlet 22, the second exhaust fan is provided with the second gas outlet 23.Pass through
One supply fan and the first exhaust fan can accelerate the air circulation in housing 10, the second supply fan and the second exhaust fan
It can accelerate to increase the air circulation in humidity regulation room 20, so as to improve the speed of cell reaction, further to improve constant humidity
The operating efficiency of machine.
Optionally, the second air inlet 22 protrudes from the lateral surface setting of housing 10, and/or the second gas outlet 23 protrudes from shell
The lateral surface of body 10 is set.So being easy to the first air inlet 11 and the first gas outlet 12 being connected to needs to carry out the sky for keeping humidity
Between.Such as when needing that the space in showcase is humidified or dehumidified, because the space in showcase is mainly used in display material
Product, and space is smaller, at this moment, constant humidity machine can be placed on to the outside of showcase, in the second air inlet 22 and the second gas outlet 23
Connecting conduit is passed through showcase, you can showcase is humidified or dehumidified.Certainly, if it is desired, constant humidity machine can also be put
In showcase, connected in the first air inlet 11 and the connecting conduit of the first gas outlet 12 with showcase extraneous air.
Optionally, constant humidity machine also includes humidity sensor, and humidity sensor electrically connects with control element 30, control element 30
Control the work of electrolytic element 21 again by humidity sensor acquisition ambient humidity information.It can be realized pair by humidity sensor
In the real-time monitoring of ambient humidity, and then the real-time control for ambient humidity is realized by control element 30 again.
As shown in figure 3, the constant humidity machine in the present embodiment also includes display 50, display 50 is electrically connected with control element 30
Connect.Display 50 can show humidity value current in default humidity value and showcase.In this example it is shown that device 50
On the front panel of constant humidity machine, be easy to user observe showcase in humidity value.
Optionally, constant humidity machine also includes communication device, and communication device electrically connects with control element 30, and communication device is used to connect
Receive the job information of control element 30 and send job information, communication device is additionally operable to receive instruction to be transferred to control element
30.By communication device, it is easy to user to carry out remote control.Preferably, communication device selects bluetooth communication, so,
Safety coefficient is higher, easy communication, can be connected with by the smart mobile phone of mandate.Meanwhile MANET can be supported, it is easy to
Equipment is managed concentratedly.
The utility model is additionally provided not shown in a kind of showcase figure, is provided with constant humidity machine, and constant humidity machine is above-mentioned perseverance
Wet machine.Using the showcase of above-mentioned constant humidity machine, for historical relic and valuable jewellery and other items, safe ring can be not only provided
Border ensures, can also remove from and periodically add water and change the workload of consumptive material, uses pollution-free, efficiency high, small volume, power consumption
It is few.
As can be seen from the above description, the utility model the above embodiments realize following technique effect：
At work, direct current is fed on the porous electrolytic film of electrolytic element 21 electrolytic element 21, and the two of electrolytic film
Side forms anode and negative electrode respectively, and the hydrone in a space is separated into hydrogen ion and oxygen in anode-side, and hydrogen ion passes through
Electrolytic film reaches cathode side, and is reacted with the air in another space and generate hydrone.Based on this principle, then by changing
The energization direction of transformation electrolytic element 21, you can the air humidity in humidity regulation room 20 is adjusted, and then regulation and humidity
The air humidity in showcase that regulation room 20 is connected.Relatively independent humidity regulation room 20 is placed in housing 10, it is wet
Each of degree regulation room 20 can set electrolytic element 21 with the wall that the interior air-flow of housing 10 is contacted, and can thus carry
The operating efficiency of high constant humidity machine.On the other hand, by the first air inlet 11 on housing 10 and the first gas outlet 12 to housing 10
Interior air is circulated, and humidity regulation room 20 can also be radiated, it helps the gas around humidity regulation room 20
Circulation.
Unless specifically stated otherwise, the part and the relative cloth of step otherwise illustrated in embodiment of the present utility model
Put, numerical expression and the unlimited the scope of the utility model processed of numerical value.Meanwhile person of ordinary skill in the relevant should be understood that
For the ease of description, the size of the various pieces shown in accompanying drawing is not to be drawn according to the proportionate relationship of reality.For
Technology, method and apparatus may be not discussed in detail known to person of ordinary skill in the relevant, but in the appropriate case, it is described
Technology, method and apparatus should be considered as authorizing part for specification.It is any in shown here and discussion all examples
Occurrence should be construed as merely exemplary, not as limitation.Therefore, the other examples of exemplary embodiment can be with
With different values.It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once it is a certain
It is defined, then it need not be further discussed in subsequent accompanying drawing in Xiang Yi accompanying drawing.
In description of the present utility model, it is to be understood that the noun of locality such as " forward and backward, upper and lower, left and right ", " horizontal,
Vertically, vertically, it is horizontal " and " pushing up, bottom " etc. indicated by orientation or position relationship be normally based on orientation or position shown in the drawings
Relation is put, description the utility model is for only for ease of and simplifies description, in the case where not making opposite explanation, these nouns of locality
Do not indicate that and imply that the device of meaning or element there must be specific orientation or with specific azimuth configuration and operation, because
This is it is not intended that limitation to scope of protection of the utility model；The noun of locality " inside and outside " refers to the wheel relative to each part in itself
Wide is inside and outside.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (12)
- A kind of 1. constant humidity machine, it is characterised in that including：Housing (10), the first air inlet (11) and the first gas outlet (12), first air inlet are offered on the housing (10) Mouth (11) and first gas outlet (12) are used to connect the air in the housing (10) with external environment；Humidity regulation room (20), it is placed in the housing (10), the second air inlet is offered on the humidity regulation room (20) (22) it is used for the second gas outlet (23), second air inlet (22) and second gas outlet (23) by the humidity regulation Air in room (20) is connected with interior environment；Wherein, electrolytic element (21) is installed on the wall of the humidity regulation room (20), the first of the electrolytic element (21) Pole-face and the air contact in the humidity regulation room (20), the second pole-face and the housing (10) of the electrolytic element (21) Interior air contact, the electrolytic element (21) are used for the humidity for adjusting the interior air of the humidity regulation room (20).
- 2. constant humidity machine according to claim 1, it is characterised in that the electrolytic element (21) is multiple, and the humidity is adjusted It is multiple to save the wall of room (20), and multiple electrolytic elements (21) are separately positioned on the more of the humidity regulation room (20) On the individual wall.
- 3. constant humidity machine according to claim 1, it is characterised in that the electrolytic element (21) is two, two electricity Solution element (21) be separately positioned on the wall relative with first air inlet (11) and with first gas outlet (12) on the relative wall.
- 4. constant humidity machine according to claim 1, it is characterised in that the humidity regulation room (20) and the housing (10) Inwall is connected, and the side wall being connected with the humidity regulation room (20) of the housing (10) forms the humidity regulation room (20) A wall, second air inlet (22) and second gas outlet (23) are opened in corresponding on the housing (10) In the side wall of the humidity regulation room (20).
- 5. constant humidity machine according to claim 4, it is characterised in that the bottom of the humidity regulation room (20) and the housing (10) bottom wall is set at intervals.
- 6. constant humidity machine according to claim 5, it is characterised in that the constant humidity machine also includes control element (30), described Control element (30) is arranged on the inwall of the housing (10).
- 7. constant humidity machine according to claim 6, it is characterised in that the constant humidity machine also includes dc source (40), described Dc source (40) is arranged in the housing (10), the dc source (40) respectively with the electrolytic element (21) and described Control element (30) electrically connects.
- 8. constant humidity machine according to claim 7, it is characterised in that first air inlet (11) and first gas outlet (12) it is opened in respectively in two side walls relative on the housing (10).
- 9. constant humidity machine according to claim 8, it is characterised in that the constant humidity machine also includes humidity sensor, described wet Degree sensor electrically connects with the control element (30), and the control element (30) obtains the ring that the humidity sensor detects Border humidity information is to control the work of the electrolytic element (21).
- 10. constant humidity machine according to claim 7, it is characterised in that the constant humidity machine also includes display (50), described aobvious Show that device (50) electrically connects with the control element (30).
- 11. constant humidity machine according to claim 7, it is characterised in that the constant humidity machine also includes communication device, the communication Element electrically connects with the control element (30), and the communication device is for receiving the job information of the control element (30) simultaneously The job information is sent, the communication device is additionally operable to receive instruction to be transferred to the control element (30).
- 12. a kind of showcase, is provided with constant humidity machine, it is characterised in that the constant humidity machine is any one of claim 1 to 11 institute The constant humidity machine stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720339057.3U CN206959178U (en) | 2017-03-31 | 2017-03-31 | Constant humidity machine and showcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720339057.3U CN206959178U (en) | 2017-03-31 | 2017-03-31 | Constant humidity machine and showcase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206959178U true CN206959178U (en) | 2018-02-02 |
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ID=61372579
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| CN201720339057.3U Active CN206959178U (en) | 2017-03-31 | 2017-03-31 | Constant humidity machine and showcase |
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| Country | Link |
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| CN (1) | CN206959178U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895499A (en) * | 2017-03-31 | 2017-06-27 | 北京清软时代科技有限公司 | Constant humidity machine and showcase |
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2017
- 2017-03-31 CN CN201720339057.3U patent/CN206959178U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895499A (en) * | 2017-03-31 | 2017-06-27 | 北京清软时代科技有限公司 | Constant humidity machine and showcase |
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