CN203489443U - Access door for air conditioner box and air conditioner box - Google Patents
Access door for air conditioner box and air conditioner box Download PDFInfo
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- CN203489443U CN203489443U CN201320604765.7U CN201320604765U CN203489443U CN 203489443 U CN203489443 U CN 203489443U CN 201320604765 U CN201320604765 U CN 201320604765U CN 203489443 U CN203489443 U CN 203489443U
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- door
- doorframe
- air
- inside door
- conditioning box
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Abstract
The utility model provides an access door for an air conditioner box and the air conditioner box. The access door for the air conditioner box comprises an inner door, a door frame and a sealing piece, wherein the door frame is provided with a fixing portion and a clamping portion which are oppositely arranged, the fixing portion is matched with the edge of a frame of the air conditioner box and used for being fixedly connected with the frame of the air conditioner box, and the clamping portion is matched with the edge of the inner door; the sealing piece is arranged between the door frame and the inner door and used for sealing a gap between the door frame and the inner door when the inner door and the door frame are closed. When the air conditioner box is provided with the access door, the door frame of the access door is directly fixed to the frame of the air conditioner box, so that redundant space occupied by the access door is reduced, the installation cost of the access door is reduced, installation processes of the access door are reduced, and meanwhile energy loss generated by air leakage in the operation process of the air conditioner box is reduced.
Description
Technical field
The utility model relates to air conditioner technical field, relates in particular to a kind of access door for air-conditioning box.In addition, the utility model also relates to a kind of air-conditioning box that comprises above-mentioned access door.
Background technology
Air-conditioning box also claims combined air processing group, is generally arranged on the outdoor of factory, office building, market, hotels and other places.The function of air-conditioning box is to realize refrigeration, heats, humidification is in one, realizes the processing to the temperature of air, humidity and cleanliness factor.Air-conditioning box internal structure is mostly preheat coil, heat(ing) coil, refrigeration coil, humidifier, pressure fan, roughing efficiency air filter, medium effeciency filter.Thereby the VMC formation return air blowing system that itself and air supply duct, return air duct, part factory install is realized, freeze the summer in workshop or market etc. and the function of winter heating.
Access door on air-conditioning box is for the convenient maintenance and inspection to air-conditioning box equipment.When air-conditioning has fault, maintenance personal can directly open access door air-conditioning is keeped in repair.Access door generally comprises inside door and doorframe, when closing, inside door and doorframe there is inevitable gap between inside door and doorframe, because air-conditioning box exists pressure differential with between ambient atmosphere, air can be under the effect of pressure differential, by the gap between inside door and doorframe, by hyperbar place, pour in low pressure place, thereby the air quantity of air-conditioning system and heat exchange amount are impacted.
Conventional access door comprises panel type access door and plastic-steel type access door.The design feature of air conditioning box body determines that panel type access door only can external-open, when outer open form access door is used for positive-pressure door, air pressure from inside to outside increases the inside door of access door and the gap of doorframe, cause larger leaking out, cause the loss of energy, therefore, outer open form access door reality is only applicable to doing negative pressure door, is not suitable for doing positive-pressure door.
And conventional plastic-steel access door adopts the general plastic material of air conditioner industry, although can be divided into according to the pressure in air-conditioning box negative pressure door and positive-pressure door, avoided the loss of energy.But conventional plastic-steel access door can not be directly fixed on the framework of air-conditioning box, during use, need the foaming panel doorframe of additional configuration hollow, so just need two doorframes.But inside door need to meet the maintenance that predetermined size could facilitate air-conditioning box, and foaming panel doorframe has taken certain size, has therefore strengthened the size of air-conditioning box.Because the effect of heat insulation of foaming panel doorframe is not good, equally also can cause the loss of energy in addition.
Therefore, be necessary to propose a kind of access door for air-conditioning box and air-conditioning box, to solve problems of the prior art.
Utility model content
In order to solve the deficiencies in the prior art, the utility model provides a kind of access door for air-conditioning box, and it comprises: inside door; Doorframe, described doorframe has back to the fixed part and the holding section that arrange, and the edge of the framework of described fixed part and air-conditioning box matches, and for being fixedly connected with the described framework of described air-conditioning box, the edge of described holding section and described inside door matches; And seal, it is arranged between described doorframe and described inside door, for seal the gap between described doorframe and described inside door when described inside door and described doorframe are closed.
Preferably, described holding section comprises first step portion, and the sidepiece of described inside door is provided with the second step portion coordinating with described first step portion.
Preferably, described first step portion comprises the step surface parallel with described inside door, and described seal is arranged on described step surface.
Preferably, on described step surface, be provided with the draw-in groove for fixing described seal.
Preferably, the first end of described seal is fixed in described draw-in groove, and the second end of described seal is configured to the elastic portion that pressed by described inside door when described inside door and described doorframe are closed.
Preferably, described seal configurations is that the longitudinal section of described the second end is ring-type along the strip member of the edge extension of described doorframe.
Preferably, described doorframe for being provided with a plurality of projections on the surface contacting with the framework of described air-conditioning box and/or on the step surface of the described second step portion of described inside door.
On the basis of technique scheme, the utility model also provides a kind of air-conditioning box, and it comprises that, according to the access door described in above-mentioned any one technical scheme, the fixed part of described doorframe is fixedly connected with the described framework of described air-conditioning box.
Preferably, described holding section comprises first step portion, is provided with the step surface parallel with described inside door, in described first step portion when described access door is used as positive-pressure door, inwardly, and described inside door is connected to the described framework of described air-conditioning box to described step surface pivotly.
Preferably, described holding section comprises first step portion, in described first step portion, is provided with the step surface parallel with described inside door, and when described access door is used as negative pressure door, outwardly, and described inside door is connected to described doorframe to described step surface pivotly.
When air-conditioning box is provided with the access door that the utility model provides, the doorframe of access door is directly fixed on the framework of air-conditioning box, reduce the installation cost of access door and reduced the installation procedure of access door, reduced the energy loss in air-conditioning box running simultaneously.
In utility model content part, introduced the concept of a series of reduced forms, this will further describe in specific embodiment part.The utility model content part does not also mean that key feature and the essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection domain of attempting to determine technical scheme required for protection.
Below in conjunction with accompanying drawing, describe advantage of the present utility model and feature in detail.
Accompanying drawing explanation
Following accompanying drawing of the present utility model is used for understanding the utility model in this as a part of the present utility model.Shown in the drawings of embodiment of the present utility model and description thereof, be used for explaining principle of the present utility model.In the accompanying drawings,
Fig. 1 is according to the schematic diagram of the doorframe of the access door for air-conditioning box of a preferred embodiment of the present utility model;
Fig. 2 is the schematic diagram of the doorframe of doorframe shown in composition diagram 2;
Fig. 3 is the partial enlarged drawing of A portion shown in Fig. 2;
Fig. 4 is according to the schematic diagram of the doorframe of the access door for air-conditioning box of another preferred embodiment of the present utility model;
Fig. 5 is the schematic diagram of the doorframe of doorframe shown in composition diagram 4;
Fig. 6 is the partial enlarged drawing of B portion shown in Fig. 5;
Fig. 7 is according to the schematic diagram of the inside door of the access door for air-conditioning box of a preferred embodiment of the present utility model;
Fig. 8 is that inside door shown in Fig. 7 is along the sectional view of minor axis direction;
Fig. 9 is the schematic diagram of the interior door frame of inside door shown in composition diagram 7;
Figure 10 is according to the schematic diagram of the seal of the access door for air-conditioning box of a preferred embodiment of the present utility model;
Figure 11 is the longitdinal cross-section diagram of seal shown in Figure 10;
Figure 12 is the mounting structure schematic diagram according to the access door for air-conditioning box of a preferred embodiment of the present utility model;
Figure 13 is the mounting structure schematic diagram according to the access door for air-conditioning box of another preferred embodiment of the present utility model.
The specific embodiment
In the following description, a large amount of concrete details have been provided to thoroughly understand the utility model.Yet, it will be apparent to one skilled in the art that the utility model can implement without one or more these details in the situation that.In other example, for fear of obscuring with the utility model, for technical characterictics more well known in the art, be not described.
In order thoroughly to understand the utility model, provided in the following description detailed structure.Obviously, embodiment of the present utility model is not limited to details appreciated by those skilled in the art.In below describing in detail, comprised preferred embodiment of the present utility model, yet except these preferred embodiments, the utility model can also have other embodiments.
The access door for air-conditioning box that the utility model provides comprises inside door, doorframe and seal.Below will be described in detail this access door.
Inside door 2, in the mounting structure of access door as shown in Figure 12 and Figure 13, one side of inside door 2 is connected on air-conditioning box pivotly, and shown in Figure 12 is that a side of inside door is connected on the doorframe being fixed on air-conditioning box pivotly, and inside door shown in figure is as negative pressure door.Shown in Figure 13 is that a side of inside door is directly connected on the side bar 51 of air-conditioning box pivotly, and, on the framework of air-conditioning box, inside door shown in figure is as positive-pressure door.All the other sides of inside door 2 can be combined in or leave air-conditioning box thus.Inside door 2 is also removably connected in the doorframe 1 being fixed on air-conditioning box.Thereby realize the opening and closing of access door, with realize maintainer to the maintenance of air-conditioning box and access door airtight to air-conditioning box inside.
As shown in Figure 1, doorframe 1 has fixed part 11 and the holding section being oppositely arranged, and fixed part 11 is for doorframe is fixed on to air-conditioning box, and holding section is for being arranged on doorframe by inside door.Particularly, fixed part 11 matches with the edge of the framework of air-conditioning box, and for being fixedly connected with the framework of air-conditioning box, and the edge of holding section and inside door matches, and inside door removably or is pivotly connected in doorframe.As preferred embodiment, the edge of the surrounding of doorframe is provided with fixed part 11, and the edge of the surrounding of doorframe all matches with the edge of the framework of air-conditioning box thus, thereby doorframe is securely fixed on the framework of air-conditioning box.
Seal, as shown in figure 10, is arranged between doorframe and inside door, for the gap between Sealed doorframe and inside door when inside door and doorframe are closed.Thereby the circulation of the inside and outside gas of minimizing air-conditioning box.
When the air-conditioning box that access door of the present utility model is installed is during in running status, the doorframe of this access door is directly fixed on the framework of air-conditioning box, the access door using with respect to routine, saved foaming panel doorframe, reduce installation cost and reduced installation procedure, reduced the energy loss under air-conditioning box running status simultaneously.
Scrutable, access door also comprises door lock member, as the door lock 7 in Figure 12.Door lock member is configured to when inside door 2 and doorframe 1 are closed inside door 2 is sealed to doorframe 1.Thereby make inside door 2 be difficult for opening.
Can mate by arbitrary structures mutually with the edge of inside door 2 holding section, as long as can realize inside door 2, removably or is pivotly connected in doorframe 1.As preferred embodiment, as shown in Figures 2 and 3, holding section comprises first step portion 12, and the sidepiece of inside door 2 is provided with the second step portion 22 coordinating with first step portion 12.The cooperation of first step portion 12 and second step portion 22 is by the realization that cooperatively interacts of a plurality of steps, seal is arranged between first step portion 12 and second step portion 22, between the first step portion 12 that is arranged so that of a plurality of steps and second step portion 22, form thus multiple-sealedly, strengthened the sealing effectiveness between inside door and doorframe.
As shown in Fig. 3 and Figure 12, in order to realize better sealing effectiveness between inside door 2 and doorframe 1, preferably, first step portion 12 comprises the step surface parallel with inside door 2 121, and seal 3 is arranged on step surface 121.Because step surface 121 is parallel with inside door 2, thus when closing on step surface, inside door 2 can clamp seal 3, so seal 3 seals the gap between inside door 2 and doorframe 1 completely.In addition preferably, the quantity of step surface 121 is 2, and while being less than 2 step surfaces, sealing effectiveness is bad, is subject to the thickness limits of inside door 2, be not used in existing air-conditioning box, but the utility model is not restricted to this during unnecessary 2 step surfaces.
As shown in Figure 11 and Figure 12, the first end 31 of seal 3 is fixed in draw-in groove 1, and the first end 31 of seal 3 can have elasticity also can not have elasticity.And as preferred embodiment, the second end 32 of seal 3 is configured to the elastic portion that pressed by inside door 2 when inside door 2 and doorframe 1 are closed.The gap making between inside door 2 and doorframe 1 of pressing of elastic portion is sealed thus, thereby stops the inside and outside gas communication of air-conditioning box, reduces energy loss.Thus as long as guarantee that the second end 32 of seal 3 is the elastic portion that can be extruded.
As shown in Figure 10 and Figure 11, preferably, seal 3 is configured to the strip member extending along the edge of doorframe 2, and the longitudinal section of the second end 32 is ring-type.Seal 3 can all seal the gap between inside door 2 and doorframe 1 when inside door 2 and doorframe 1 are closed thus.In addition, the second end 32 can be arbitrary shape, as long as can seal the gap between inside door 2 and doorframe 1 after being extruded.Certainly, if the material that seal 3 is selected can be that elasticity is better, the elastomeric material that quality is higher, but the elasticity at the selection of material is little, in situation of low quality, as preferred embodiment, the longitudinal section of the second end 32 is ring-type, thereby the second end 32 is easily extruded.Therefore improved the sealing between inside door 2 and doorframe 1.
It should be noted that, the term using " indulge " for seal under free state during horizontal positioned along the direction perpendicular to horizontal plane.The term that used in addition " interior " and " outward ", for air-conditioning box, are towards the inside of air-conditioning box inwardly, are direction in contrast outwardly.
Sealing while being connected with the framework of air-conditioning box in order to increase doorframe 1, as preferred embodiment, as shown in Figure 3, doorframe 1 for being provided with a plurality of protruding 111 on the surface contacting with the framework of air-conditioning box, in addition, in order to strengthen the sealing between inside door 2 and doorframe 1, as shown in Figure 9, on the step surface 221 of the second step portion 22 of inside door 2, be provided with a plurality of protruding 222.
Fig. 7, Fig. 8 and Figure 9 shows that the inside door of a preferred embodiment of access door, the edge of inside door is interior door frame, the second step portion 22 arranging on this interior door frame coordinates for the first step portion 12 with holding section.As shown in Figure 8, the structure of inside door 2 is to be filled with polyurethane material in the hollow cavity being comprised of the interior door frame in the panel beating on the two side of inside door 2 and end walls.Because polyurethane material has certain density, thereby play the effect of heat insulation inside and outside air-conditioning box and promote the performance that inside door 2 bears air pressure.Panel beating can be selected galvanized sheet or the corrosion resistant plate of different-thickness according to demand.In addition, it should be noted that, the inside door of the preferred embodiment goes for negative pressure door and positive-pressure door, and difference is only the difference of mounting means.
Be a preferred embodiment of the doorframe of access door as shown in Figure 1, Figure 2 and Figure 3, the access door of the preferred embodiment is used as negative pressure door.When the air pressure in air-conditioning box is less than external atmosphere pressure, can select the access door of the preferred embodiment.Be illustrated in figure 2 the doorframe that forms negative pressure door, adopt hot extrusion technique moulding.As shown in Figure 3, in the interior zone of doorframe, can insert some reinforcements 4 and bear air pressure intensity of force to improve doorframe, in addition, can also improve the bonding strength of the framework of doorframe and air-conditioning box.While manufacturing the doorframe in this embodiment, after doorframe as shown in Figure 2 45 degree is cut sth. askew and cut, adopt sweat soldering technique to form the doorframe of the negative pressure door shown in Fig. 1.In order to guarantee the sealing between inside door and doorframe, the seal adopting also can 45 degree cut sth. askew and cut, insert in draw-in groove 122, wherein between two seals, adopt high-intensity glue bonding, thereby can form in the edge of doorframe the complete sealing ring of a figure, improve the sealing of access door.
The mounting means that is used as the access door of negative pressure door can adopt arbitrary structures, as long as can guarantee the access door after installation, when inside door 2 and doorframe 1 are closed, seal 3 is by the clearance seal between inside door 2 and doorframe 1.As preferred mounting means, as shown in figure 12, holding section comprises first step portion, is provided with the step surface parallel with inside door in first step portion, and this step surface outwardly.In figure, in order to clearly demonstrate the mounting structure of access door, the parts of air-conditioning box, hinge and door lock are adopted and are dotted.As shown in figure 12, the plane that is wherein provided with seal 3 is step surface 121 (referring to Fig. 3).As can be seen from the figure, one side of doorframe 1 is fixedly connected with the side bar 51 of air-conditioning box, and a side is corresponding thereto fixedly connected with the central sill 52 of air-conditioning box, inside door 2 is attached via a hinge on the doorframe of side bar 51 1 sides, when inside door 2 is closed with the doorframe of central sill 52 1 sides, by the door lock 7 near central sill 52 1 sides, inside door 2 is sealed to doorframe 1.As shown in figure 12, inside door 2 is arranged to the door of outer open form, and outwardly, for supporting inside door 2, and the lasting inside gas pressure 8 that inside door 2 bears makes inside door 2 press seal part 3 all the time to the step surface of doorframe 1.Thereby guaranteed the sealing between inside door 2 and doorframe 1, reduced energy loss.
Fig. 4, Fig. 5 and Figure 6 shows that another preferred embodiment of the doorframe of access door, the access door of the preferred embodiment is used as positive-pressure door.Wherein, doorframe 1 ' has fixed part 11 ' and the holding section being oppositely arranged.Holding section comprises first step portion 12 ', and first step portion 12 ' comprises the step surface 121 ' parallel with inside door 2, is provided with the draw-in groove 122 ' for fixing seals 3 on step surface 121 '.When the air pressure in air-conditioning box is greater than ambient pressure, can select the doorframe of this preferred embodiment.Be illustrated in figure 5 the doorframe that forms negative pressure door, the doorframe of positive-pressure door is also that the doorframe sweat soldering technique of being cut sth. askew after cutting by 45 degree forms.Content identical with negative pressure door in this preferred embodiment no longer repeats, and only sets forth different parts.
Be used as positive-pressure door access door mounting structure as shown in figure 13, holding section comprises first step portion, is provided with the step surface parallel with inside door in first step portion, the step surface of doorframe inwardly.The plane that is wherein provided with seal 3 is step surface 121 ' (referring to Fig. 6).As can be seen from Figure 13, a side of doorframe 1 ' is fixedly connected with the side bar 51 of air-conditioning box, and a side is corresponding thereto fixedly connected with the central sill 52 of air-conditioning box, and inside door 2 is connected on the side bar 51 of air-conditioning box pivotly, on the framework of air-conditioning box.When inside door 2 and doorframe 1 ' are closed, by the door lock 7 near central sill 52 1 sides, inside door 2 is sealed to doorframe 1 '.Thereby realize the locking of inside door 2.Because positive-pressure door is that air pressure in air-conditioning box is greater than ambient pressure, inside door 2 is arranged to the door of interior open form, and the step surface of doorframe 1 ' inwardly, and when inside door 2 and doorframe 1 are closed, step surface 121 ' (referring to Fig. 6) is for supporting inside door 2.And the lasting outside gas pressure 9 that inside door 2 bears makes inside door 2 press seal part 3 all the time.Thereby guaranteed the sealing between inside door 2 and doorframe 1 ', reduced energy loss.
In addition, on the basis of technique scheme, the utility model also provides a kind of air-conditioning box, and it comprises that the fixed part of doorframe is fixedly connected with the framework of air-conditioning box according to the access door described in above-mentioned any one technical scheme.
The utility model is illustrated by above-described embodiment, but should be understood that, above-described embodiment is for giving an example and illustration purpose, but not is intended to the utility model to be limited in described scope of embodiments.In addition it will be understood by those skilled in the art that; the utility model is not limited to above-described embodiment; according to instruction of the present utility model, can also make more kinds of variants and modifications, these variants and modifications all drop in the utility model scope required for protection.Protection domain of the present utility model is defined by claims and equivalent scope thereof.
Claims (10)
1. for an access door for air-conditioning box, it is characterized in that, it comprises:
Inside door;
Doorframe, described doorframe has back to the fixed part and the holding section that arrange, and the edge of the framework of described fixed part and air-conditioning box matches, and for being fixedly connected with the described framework of described air-conditioning box, the edge of described holding section and described inside door matches; And
Seal, it is arranged between described doorframe and described inside door, for seal the gap between described doorframe and described inside door when described inside door and described doorframe are closed.
2. access door according to claim 1, is characterized in that, described holding section comprises first step portion, and the sidepiece of described inside door is provided with the second step portion coordinating with described first step portion.
3. access door according to claim 2, is characterized in that, described first step portion comprises the step surface parallel with described inside door, and described seal is arranged on described step surface.
4. access door according to claim 3, is characterized in that, is provided with the draw-in groove for fixing described seal on described step surface.
5. access door according to claim 4, is characterized in that, the first end of described seal is fixed in described draw-in groove, and the second end of described seal is configured to the elastic portion that pressed by described inside door when described inside door and described doorframe are closed.
6. access door according to claim 5, is characterized in that, described seal configurations is that the longitudinal section of described the second end is ring-type along the strip member of the edge extension of described doorframe.
7. access door according to claim 1, is characterized in that, described doorframe for being provided with a plurality of projections on the surface contacting with the framework of described air-conditioning box and/or on the step surface of the described second step portion of described inside door.
8. an air-conditioning box, is characterized in that, it comprises according to the access door described in any one in claim 1 to 7, and the fixed part of described doorframe is fixedly connected with the described framework of described air-conditioning box.
9. air-conditioning box according to claim 8, it is characterized in that, described holding section comprises first step portion, in described first step portion, be provided with the step surface parallel with described inside door, when described access door is used as positive-pressure door, inwardly, and described inside door is connected to the described framework of described air-conditioning box to described step surface pivotly.
10. air-conditioning box according to claim 8, it is characterized in that, described holding section comprises first step portion, in described first step portion, be provided with the step surface parallel with described inside door, when described access door is used as negative pressure door, outwardly, and described inside door is connected to described doorframe to described step surface pivotly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320604765.7U CN203489443U (en) | 2013-09-27 | 2013-09-27 | Access door for air conditioner box and air conditioner box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320604765.7U CN203489443U (en) | 2013-09-27 | 2013-09-27 | Access door for air conditioner box and air conditioner box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203489443U true CN203489443U (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320604765.7U Expired - Lifetime CN203489443U (en) | 2013-09-27 | 2013-09-27 | Access door for air conditioner box and air conditioner box |
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| Country | Link |
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| CN (1) | CN203489443U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982118A (en) * | 2014-04-22 | 2014-08-13 | 鲁柏鑫 | Cold-bridge-free air conditioner fan box body access door assembly |
| CN104074443A (en) * | 2014-07-01 | 2014-10-01 | 安徽公元科技发展有限公司 | Special door for central air conditioning room |
| CN104929497A (en) * | 2015-06-15 | 2015-09-23 | 南京依友空调配件有限公司 | Double-open air-conditioner inspection door |
| US11118807B2 (en) | 2016-03-04 | 2021-09-14 | Carrier Corporation | Door assembly, air handling unit comprising such a door assembly, and method for manufacturing such a door assembly |
| CN115263153A (en) * | 2022-08-09 | 2022-11-01 | 南通华信中央空调有限公司 | Air conditioner access door with double sealing |
-
2013
- 2013-09-27 CN CN201320604765.7U patent/CN203489443U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982118A (en) * | 2014-04-22 | 2014-08-13 | 鲁柏鑫 | Cold-bridge-free air conditioner fan box body access door assembly |
| CN103982118B (en) * | 2014-04-22 | 2016-03-09 | 鲁柏鑫 | Without cold bridge air-conditioning fan box access door assembly |
| CN104074443A (en) * | 2014-07-01 | 2014-10-01 | 安徽公元科技发展有限公司 | Special door for central air conditioning room |
| CN104929497A (en) * | 2015-06-15 | 2015-09-23 | 南京依友空调配件有限公司 | Double-open air-conditioner inspection door |
| US11118807B2 (en) | 2016-03-04 | 2021-09-14 | Carrier Corporation | Door assembly, air handling unit comprising such a door assembly, and method for manufacturing such a door assembly |
| CN115263153A (en) * | 2022-08-09 | 2022-11-01 | 南通华信中央空调有限公司 | Air conditioner access door with double sealing |
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Granted publication date: 20140319 |