CN210267641U - Fresh air device and bypass valve - Google Patents
Fresh air device and bypass valve Download PDFInfo
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- CN210267641U CN210267641U CN201921085063.6U CN201921085063U CN210267641U CN 210267641 U CN210267641 U CN 210267641U CN 201921085063 U CN201921085063 U CN 201921085063U CN 210267641 U CN210267641 U CN 210267641U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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Abstract
The utility model provides a new trend device and bypass valve, bypass valve include opening and closing door and actuating mechanism, actuating mechanism includes preceding push rod, back push rod, installing support, swing arm, travel switch, motor fixed plate and gear motor, and the new trend device includes the new trend wind channel and the wind channel of airing exhaust, and the new trend wind channel is including the direct branch road of new trend and the new trend heat transfer branch road that distribute side by side, and the bypass valve can realize the switching of the direct branch road of new trend and new trend heat transfer branch road fast and stably. The fresh air and the indoor dirty air exhaust air exchange heat in the countercurrent total heat exchange core to recycle heat. When the external temperature is 18-25 ℃, fresh air directly flows into the room without passing through the countercurrent total heat exchange core, and the comfortable temperature can be achieved without cold and heat source supplement in the room, so that the energy-saving effect is achieved, and the emission is greatly reduced. When the outdoor temperature is below 0 ℃, the bypass valve closes the fresh air heat exchange branch, so that outdoor cold air does not flow into the countercurrent full-heat exchange core, and the anti-freezing protection effect on the heat exchange core is achieved.
Description
Technical Field
The utility model relates to a new trend equipment technical field, concretely relates to new trend device and bypass valve.
Background
The concept of passive rooms, which is built on the basis of the concept of low energy consumption buildings appearing in the last 80 th century of germany, is that passive rooms should be buildings that can maintain a comfortable indoor thermal environment without active heating and air conditioning systems. Compared with the traditional building, the energy consumption of heating and refrigerating in unit square meter required by the building energy-saving system can be up to 90%. The building energy consumption of China already accounts for 33% of the total social energy consumption, the proportion of the building energy consumption of China in the total energy consumption is nearly three-fold, the building energy consumption can be converted into 11 hundred million tons of standard coal, and with the acceleration of the urbanization process, the building energy consumption proportion of China is increased to about 35%, and the building energy consumption proportion of China exceeds the energy consumption of the traffic industry. The energy consumption of the ultra-low energy consumption passive house for improving the building comfort level is only 10 percent of that of the conventional building.
The government pays attention to the passive house by virtue of excellent energy-saving indexes, and real estate developers are promoted to adopt the passive house building by subsidy and mandatory policies. The passive building has excellent sealing and heat insulating measures, and a fresh air system must be used for indoor ventilation. The fresh air device in the current market can not be well adapted to a passive room, and the energy-saving effect is not good.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a fresh air device and a bypass valve.
In order to achieve the above object, the technical solution of the present invention is: the utility model provides a bypass valve, includes opening and closing door and actuating mechanism, actuating mechanism includes preceding push rod, back push rod, installing support, swing arm, travel switch, motor fixed plate and gear motor, the motor fixed plate is installed on the installing support, gear motor installs on the motor fixed plate, swing arm and back push rod are all installed in gear motor's the pivot, travel switch is used for examining the oscillating position of examining the swing arm, the one end of back push rod with the one end of preceding push rod is articulated mutually, the other end of preceding push rod passes through the articulated elements and connects on the opening and closing door.
The utility model discloses compare in prior art, gear motor drives the switching door around the pivot rotation through preceding push rod and back push rod, and the swing arm is followed and is rotated, bumps and touches travel switch after, gear motor stall, and the foaming cotton around the switching door compresses tightly in first vent or second vent department, realizes the switching of new trend straight-through branch road and new trend heat transfer branch road fast and stably.
Furthermore, the opening and closing door is provided with a sealing piece used for forming sealing with the fresh air heat exchange branch air inlet and the fresh air straight-through branch air inlet.
Further, the sealing element is foamed cotton.
By adopting the preferable scheme, the sealing performance is improved, and the air leakage is reduced.
The utility model provides a new trend device, includes the integral type interior, the integral type interior includes:
the indoor unit comprises an indoor unit main body and a heat exchange core, wherein the indoor unit main body comprises a frame body, an upper cover and a lower cover, the frame body, the upper cover and the lower cover are combined to at least form a fresh air duct, an exhaust air duct and a heat exchange core installation cavity, and the indoor unit main body is at least provided with an outdoor fresh air port, an outdoor exhaust air port, an indoor return air port and an indoor air supply port; the fresh air duct at least comprises a fresh air straight branch and a fresh air heat exchange branch which are distributed in parallel, and the outdoor fresh air port is an air inlet of the fresh air duct; the indoor air return port is an air inlet of the air exhaust duct, and the outdoor air exhaust port is an air outlet of the air exhaust duct; the fresh air heat exchange branch and the exhaust air duct both pass through the heat exchange core installation cavity;
the reverse flow total heat exchange core is arranged in the heat exchange core installation cavity, a fresh air flow passage of the reverse flow total heat exchange core is in butt joint with the fresh air heat exchange branch in an end-to-end mode, an exhaust air flow passage of the reverse flow total heat exchange core is in butt joint with the exhaust air passage in an end-to-end mode, and the air flow directions of the fresh air flow passage and the exhaust air flow passage of the reverse flow total heat exchange core are opposite;
the bypass valve is used for controlling the opening and closing of a fresh air heat exchange branch air inlet and a fresh air straight-through branch air inlet in the fresh air device;
the fresh air fan is arranged at the tail ends of the fresh air straight-through branch and the fresh air heat exchange branch;
and the air exhaust fan is arranged at the tail end of the air exhaust duct, and an air outlet of the air exhaust fan faces the outdoor air exhaust port.
Adopt above-mentioned preferred scheme, the heat exchange is carried out through the total heat exchange core against current to new trend and exhaust air, carries out heat recovery to the exhaust air of indoor dirty air, plays energy-conserving effect. When the outside temperature is 18-25 ℃, the fresh air heat exchange branch is closed and the fresh air straight-through branch is opened through the bypass valve, fresh air directly flows into the room without passing through the counter-flow total heat exchange core, the temperature can reach comfortable temperature indoors without cold and heat source supplement, the energy-saving effect is achieved, and emission is greatly reduced. When the outdoor temperature is lower than 0 ℃ in winter, outdoor cold air flows into the countercurrent total-heat exchange core, the heat exchange core partition plate is frosted, the heat exchange core flow channel is blocked, fresh air cannot be supplied indoors, the fresh air heat exchange branch is closed through the bypass valve, the fresh air straight-through branch is opened, the outdoor cold air does not flow into the countercurrent total-heat exchange core, and the anti-freezing protection effect on the heat exchange core is achieved.
Furthermore, a first baffle is arranged at the air inlet end of the fresh air heat exchange branch, and a first vent is arranged on the first baffle; a second baffle is arranged at the air inlet end of the fresh air straight-through branch, and a second ventilation opening is formed in the second baffle; and the driving mechanism of the bypass valve drives the opening and closing door to rotate around a door pivot, so that the opening and closing door is matched and sealed with the first ventilation opening or the second ventilation opening.
Furthermore, an air-equalizing plate is arranged in the fresh air heat exchange branch corresponding to the position of the fresh air flow channel in the countercurrent total heat exchange core, a plurality of vent holes are formed in the air-equalizing plate, and the density of the vent holes in the air-equalizing plate is gradually increased from one side close to the first vent to one side far away from the first vent.
Adopt above-mentioned preferred scheme, it is big more to be close to first vent department negative pressure more, has effectively improved the air current degree of consistency that the new trend got into the total heat exchange core against current through the board that equalizes wind, makes heat exchange core heat exchange efficiency optimization.
Further, a preheating chamber is formed between the air-equalizing plate and the first baffle, the first vent and the air-equalizing plate are obliquely arranged, a right-angled triangle opening is formed in one end, far away from the first vent, of the air-equalizing plate, a PTC preheater is installed in the preheating chamber, and the PTC preheater is parallel to the inclined edge of the right-angled triangle opening.
By adopting the preferable scheme, the fin ventilation opening of the PTC preheater forms stable airflow, so that heat generated by the PTC preheater is efficiently dissipated, and the preheating efficiency of fresh air is improved.
Furthermore, a fresh air temperature probe is installed in the front section air duct of the fresh air duct, an exhaust air temperature probe is installed in the rear section air duct of the exhaust air duct, and an indoor return air temperature probe is installed at the indoor return air inlet.
By adopting the preferable scheme, the temperature probe detects the fresh air temperature, the exhaust air temperature and the indoor return air temperature in real time and feeds the detected temperature back to the main controller, so that each component can be reliably controlled to execute actions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of one embodiment of a bypass valve of the present invention;
FIG. 2 is an exploded schematic view of FIG. 1;
fig. 3 is a schematic structural view of the integrated indoor unit;
fig. 4 is a schematic structural view of the integrated indoor unit;
FIG. 5 is a schematic view of the air duct distribution and air flow direction of the integrated indoor unit;
fig. 6 is a schematic structural view of the integrated indoor unit;
FIG. 7 is a schematic structural view of another embodiment of an integral internal machine;
fig. 8 is a sectional view taken along line C-C in fig. 7.
Names of corresponding parts represented by numerals and letters in the drawings:
21-a frame body; 22-upper cover; 23-lower cover; 24-fresh air duct; 242-fresh air straight-through branch; 243-fresh air heat exchange branch; 26-an air exhaust duct; 27-outdoor fresh air port; 28-outdoor air exhaust port; 29-indoor return air inlet; 31-indoor air supply port; 42-counterflow full heat exchange core; 43-a bypass valve; 430-a reduction motor; 431-a first baffle; 4311-first vent; 432-a second baffle; 4321-second vent; 433-opening and closing a door; 434-front push rod; 435-rear push rod; 436-mounting brackets; 437-swing arm; 438-a travel switch; 439-motor fixing plate; 45-a fresh air fan; 47-air exhaust fan; 50-air equalizing plate; 501-a vent hole; 502-right triangle opening; 51-PTC preheater; 54-fresh air temperature probe; 55-exhaust air temperature probe; 56-indoor return air temperature probe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 3, a bypass valve comprises an opening/closing door 433 and a driving mechanism, wherein the driving mechanism comprises a front push rod 434, a rear push rod 435, a mounting bracket 436, a swing arm 437, a travel switch 438, a motor fixing plate 439 and a reduction motor 430, the motor fixing plate 439 is mounted on the mounting bracket 436, the reduction motor 430 is mounted on the motor fixing plate 439, the swing arm 437 and the rear push rod 435 are both mounted on a rotating shaft of the reduction motor 430, the travel switch 438 is used for detecting a swinging position of the swing arm 437, one end of the rear push rod 435 is hinged with one end of the front push rod 434, and the other end of the front push rod 434 is connected to the opening/closing door 433 through.
A first baffle 431 is arranged at the air inlet end of the fresh air heat exchange branch, and a first vent 4311 is arranged on the first baffle 431; a second baffle 432 is arranged at the air inlet end of the fresh air straight-through branch, and a second ventilation port 4321 is arranged on the second baffle 432;
the beneficial effect of adopting above-mentioned technical scheme is: the gear motor drives the opening and closing door to rotate around the door pivot through the front push rod and the rear push rod, the swing arm rotates along with the door pivot, after the swing arm touches the travel switch, the gear motor stops rotating, foamed cotton around the opening and closing door is tightly pressed at the first vent or the second vent, and switching of the fresh air direct branch and the fresh air heat exchange branch is rapidly and stably achieved.
The utility model discloses an in other embodiments, be equipped with on the switching door and be used for forming sealed sealing member with new trend heat transfer branch road air intake and new trend straight-through branch road air intake. The sealing element is foamed cotton. The beneficial effect of adopting above-mentioned technical scheme is: the sealing performance is improved, and the air leakage is reduced.
As shown in fig. 3-6, a fresh air device includes an integrated indoor unit, the integrated indoor unit includes:
the indoor unit comprises an indoor unit main body and a heat exchange core, wherein the indoor unit main body comprises a frame body 21, an upper cover 22 and a lower cover 23, the frame body 21, the upper cover 22 and the lower cover 23 are combined to at least form a fresh air duct 24, an exhaust air duct 26 and a heat exchange core mounting cavity, and the indoor unit main body is at least provided with an outdoor fresh air port 27, an outdoor exhaust air port 28, an indoor return air port 29 and an indoor air supply port 30; the fresh air duct 24 at least comprises a fresh air straight branch 242 and a fresh air heat exchange branch 243 which are distributed in parallel, and the outdoor fresh air port 27 is an air inlet of the fresh air duct 24; the indoor return air inlet 29 is an air inlet of the air exhaust duct 26, and the outdoor air outlet 28 is an air outlet of the air exhaust duct 26; the fresh air heat exchange branch 243 and the exhaust air duct 26 both pass through the heat exchange core installation cavity; the fresh air duct 24 is separated from the exhaust air duct by a partition plate;
the counterflow total heat exchange core 42 is arranged in the heat exchange core installation cavity, a fresh air flow channel of the counterflow total heat exchange core 42 is in butt joint with the fresh air heat exchange branch 243 from head to tail, an exhaust air flow channel of the counterflow total heat exchange core 42 is in butt joint with the exhaust air duct 26 from head to tail, and the air flow directions of the fresh air flow channel and the exhaust air flow channel of the counterflow total heat exchange core 42 are opposite;
the bypass valve 43, the bypass valve 43 is used for controlling the opening and closing of the air inlet of the fresh air heat exchange branch 243 and the air inlet of the fresh air straight branch 242 in the fresh air device;
a fresh air fan 45 installed at the ends of the fresh air straight branch 242 and the fresh air heat exchange branch 243;
and the exhaust fan 47 is arranged at the tail end of the exhaust air duct 26, and the air outlet of the exhaust fan 47 faces the outdoor exhaust air opening 28.
The beneficial effect of adopting above-mentioned technical scheme is: the fresh air and the exhaust air exchange heat through the countercurrent total heat exchange core, and the exhaust air of indoor dirty air is subjected to heat recovery and utilization, so that the energy-saving effect is achieved. When the outside temperature is 18-25 ℃, the fresh air heat exchange branch is closed and the fresh air straight-through branch is opened through the bypass valve, fresh air directly flows into the room without passing through the counter-flow total heat exchange core, the temperature can reach comfortable temperature indoors without cold and heat source supplement, the energy-saving effect is achieved, and emission is greatly reduced. When the outdoor temperature is lower than 0 ℃ in winter, outdoor cold air flows into the countercurrent total-heat exchange core, the heat exchange core partition plate is frosted, the heat exchange core flow channel is blocked, fresh air cannot be supplied indoors, the fresh air heat exchange branch is closed through the bypass valve, the fresh air straight-through branch is opened, the outdoor cold air does not flow into the countercurrent total-heat exchange core, and the anti-freezing protection effect on the heat exchange core is achieved.
The respective duct airflow directions are shown by different arrows in fig. 5, in which: the open type arrow represents the fresh air flow direction; the head end closed arrow represents the fresh air flow direction of the fresh air heat exchange branch; the head part is closed and a blackened arrow represents the fresh air flow direction of the fresh air straight-through branch; the totally enclosed flow arrows represent the direction of the exhaust air.
As shown in fig. 3, 7 and 8, in other embodiments of the present invention, a first baffle 431 is disposed at an air inlet end of the fresh air heat exchange branch, and a first vent 4311 is disposed on the first baffle 431; a second baffle 432 is arranged at the air inlet end of the fresh air straight-through branch, and a second ventilation port 4321 is arranged on the second baffle 432; the driving mechanism of the bypass valve 43 drives the opening and closing door 433 to rotate around the door pivot, so that the opening and closing door 433 is matched and sealed with the first vent 4311 or the second vent 4321. The air-equalizing plate 50 is arranged in the fresh air heat exchange branch 243 corresponding to the position of the counterflow total heat exchange core 42, a plurality of vent holes 501 are formed in the air-equalizing plate 50, and the density of the vent holes 501 in the air-equalizing plate 50 is gradually increased from one side close to the first vent to one side far away from the first vent. The beneficial effect of adopting above-mentioned technical scheme is: the negative pressure at the position closer to the first vent is larger, the airflow uniformity of the reverse flow total heat exchange core entering by fresh air is effectively improved through the air-equalizing plate, and the heat exchange efficiency of the heat exchange core is optimized.
As shown in fig. 8, in other embodiments of the present invention, a preheating chamber is formed between the wind equalizing plate 50 and the first baffle 431, the first ventilation opening 4311 and the wind equalizing plate 50 are obliquely arranged, and the end of the wind equalizing plate 50 away from the first ventilation opening is provided with a right triangle opening 502, and the inside of the preheating chamber is provided with the PTC preheater 51, and the PTC preheater 51 is arranged in parallel with the hypotenuse of the right triangle opening 502. The beneficial effect of adopting above-mentioned technical scheme is: the fin vent of PTC pre-heater forms stable air current, makes the heat that the PTC pre-heater produced give off with high efficiency, improves the preheating efficiency to the new trend, through preheating the new trend, can reduce and cause the outdoor temperature critical value that the total heat exchange core takes place to freeze the frost against the current. For example, the outdoor temperature is below-2 ℃ without the PTC preheater, so that the counterflow total heat exchange core generates frost, and the PTC preheater preheats outdoor fresh air, so that the frost can be generated only when the outdoor temperature is below-8 ℃.
As shown in fig. 4, in other embodiments of the present invention, a fresh air temperature probe 54 is installed in the front air duct of the fresh air duct, an exhaust air temperature probe 55 is installed in the rear air duct of the exhaust air duct, and an indoor return air temperature probe 56 is installed at the indoor return air duct. The beneficial effect of adopting above-mentioned technical scheme is: fresh air temperature, exhaust air temperature and indoor return air temperature are detected in real time through the temperature probe and fed back to the main controller, so that each component is reliably controlled to execute actions.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (8)
1. The utility model provides a bypass valve for the switching of fresh air heat transfer branch road air intake and fresh air through branch road air intake in the control new trend device, its characterized in that, including opening and closing door and actuating mechanism, actuating mechanism includes preceding push rod, back push rod, installing support, swing arm, travel switch, motor fixed plate and gear motor, the motor fixed plate is installed on the installing support, gear motor installs on the motor fixed plate, swing arm and back push rod are all installed in gear motor's the pivot, travel switch is used for examining the swing position of examining the swing arm, the one end of back push rod with the one end of preceding push rod is articulated mutually, the other end of preceding push rod passes through the articulated elements and connects on the opening and closing door.
2. The bypass valve as recited in claim 1 wherein the opening and closing door is provided with a sealing member for sealing with the fresh air heat exchange branch air inlet and the fresh air through branch air inlet.
3. The bypass valve as recited in claim 2 wherein the seal is foam.
4. The utility model provides a new trend device, its characterized in that, includes the integral type interior machine, the integral type interior machine includes:
the indoor unit comprises an indoor unit main body and a heat exchange core, wherein the indoor unit main body comprises a frame body, an upper cover and a lower cover, the frame body, the upper cover and the lower cover are combined to at least form a fresh air duct, an exhaust air duct and a heat exchange core installation cavity, and the indoor unit main body is at least provided with an outdoor fresh air port, an outdoor exhaust air port, an indoor return air port and an indoor air supply port; the fresh air duct at least comprises a fresh air straight branch and a fresh air heat exchange branch which are distributed in parallel, and the outdoor fresh air port is an air inlet of the fresh air duct; the indoor air return port is an air inlet of the air exhaust duct, and the outdoor air exhaust port is an air outlet of the air exhaust duct; the fresh air heat exchange branch and the exhaust air duct both pass through the heat exchange core installation cavity;
the reverse flow total heat exchange core is arranged in the heat exchange core installation cavity, a fresh air flow passage of the reverse flow total heat exchange core is in butt joint with the fresh air heat exchange branch in an end-to-end mode, an exhaust air flow passage of the reverse flow total heat exchange core is in butt joint with the exhaust air passage in an end-to-end mode, and the air flow directions of the fresh air flow passage and the exhaust air flow passage of the reverse flow total heat exchange core are opposite;
the bypass valve as claimed in any one of claims 1 to 3, wherein the bypass valve is used for controlling the opening and closing of the fresh air heat exchange branch air inlet and the fresh air through branch air inlet in the fresh air device;
the fresh air fan is arranged at the tail ends of the fresh air straight-through branch and the fresh air heat exchange branch;
and the air exhaust fan is arranged at the tail end of the air exhaust duct, and an air outlet of the air exhaust fan faces the outdoor air exhaust port.
5. The fresh air device according to claim 4, wherein a first baffle is arranged at an air inlet end of the fresh air heat exchange branch, and a first vent is arranged on the first baffle; a second baffle is arranged at the air inlet end of the fresh air straight-through branch, and a second ventilation opening is formed in the second baffle; and the driving mechanism of the bypass valve drives the opening and closing door to rotate around a door pivot, so that the opening and closing door is matched and sealed with the first ventilation opening or the second ventilation opening.
6. The fresh air device according to claim 5, wherein an air-equalizing plate is disposed in the fresh air heat exchange branch corresponding to the fresh air flow channel entering the counter-flow total heat exchange core, the air-equalizing plate is provided with a plurality of vent holes, and the density of the vent holes in the air-equalizing plate gradually increases from a side close to the first vent to a side far away from the first vent.
7. The fresh air device as claimed in claim 6, wherein a preheating chamber is formed between the air-equalizing plate and the first baffle plate, the first ventilation opening is obliquely arranged with the air-equalizing plate, a right-angled triangle opening is arranged at one end of the air-equalizing plate far away from the first ventilation opening, a PTC preheater is arranged in the preheating chamber, and the PTC preheater is arranged in parallel with the oblique side of the right-angled triangle opening.
8. The fresh air device according to claim 7, wherein a fresh air temperature probe is installed in a front section air duct of the fresh air duct, an exhaust air temperature probe is installed in a rear section air duct of the exhaust air duct, and an indoor return air temperature probe is installed at the indoor return air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085063.6U CN210267641U (en) | 2019-07-11 | 2019-07-11 | Fresh air device and bypass valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085063.6U CN210267641U (en) | 2019-07-11 | 2019-07-11 | Fresh air device and bypass valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210267641U true CN210267641U (en) | 2020-04-07 |
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ID=70048775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921085063.6U Active CN210267641U (en) | 2019-07-11 | 2019-07-11 | Fresh air device and bypass valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210267641U (en) |
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2019
- 2019-07-11 CN CN201921085063.6U patent/CN210267641U/en active Active
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