CN214197419U - Safety valve for temperature control of elevator air conditioner - Google Patents
Safety valve for temperature control of elevator air conditioner Download PDFInfo
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- CN214197419U CN214197419U CN202120088902.0U CN202120088902U CN214197419U CN 214197419 U CN214197419 U CN 214197419U CN 202120088902 U CN202120088902 U CN 202120088902U CN 214197419 U CN214197419 U CN 214197419U
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Abstract
The utility model provides a relief valve for elevator air conditioner control by temperature change belongs to relief valve technical field. The safety valve for controlling the temperature of the elevator air conditioner comprises a valve body mechanism and an adjusting mechanism. The valve body mechanism comprises a valve shell assembly, a valve core assembly, a maintenance assembly, a first bolt and a sealing plate, wherein the valve shell assembly comprises a valve body shell, the valve core assembly is connected to the inner wall of the valve body shell, the sealing plate is inserted into one end of the valve body shell, the sealing plate is located between the maintenance assembly and the valve body shell, and the first bolt penetrates through the maintenance assembly in a sliding mode. The utility model discloses an effect of second bolt, slide rail, slide, guide rail, second magnet, first magnet, pendulum rod, axostylus axostyle, support and input tube to long service life's purpose has been reached, and the relief valve makes the switching-on and switching-off piece be in the normally closed state through magnet repulsion, is difficult for ageing, and the difficult reduction of the control degree of accuracy to pressure can improve air conditioning element's life.
Description
Technical Field
The utility model relates to a relief valve field particularly, relates to a relief valve is used in elevator air conditioner control by temperature change.
Background
The safety valve is a special valve which prevents the medium pressure in the pipeline or the equipment from exceeding the specified value by discharging the medium to the outside of the system when the medium pressure in the equipment or the pipeline rises to exceed the specified value, the air-conditioning safety valve is generally arranged at the position of the water return end of the system close to the expansion tank, the service life of the existing safety valve for controlling the temperature of the elevator air conditioner is short, the pressure relief opening is exposed by the fact that the pressure of the safety valve is larger than the elastic force of a spring, the spring is easy to age after long-time use, the control accuracy of the pressure is reduced after the spring ages, and the air-conditioning element is easy to damage.
Therefore, a safety valve for controlling temperature of an elevator air conditioner is provided by those skilled in the art to solve the problems in the background art.
SUMMERY OF THE UTILITY MODEL
In order to compensate above not enough, the utility model provides an elevator is relief valve for air conditioner control by temperature change aims at improving the short problem of relief valve life.
The utility model discloses a realize like this:
the utility model provides a relief valve for elevator air conditioner control by temperature change, including valve body mechanism and adjustment mechanism.
The valve body mechanism comprises a valve shell component, a valve core component, a maintenance component, a first bolt and a sealing plate, the valve shell component comprises a valve body shell, the valve core component is connected with the inner wall of the valve body shell, the sealing plate is inserted at one end of the valve body shell, the sealing plate is positioned between the maintenance component and the valve body shell, the first bolt penetrates through the maintenance component in a sliding manner, a first threaded hole is formed in one side of the valve body shell, the first bolt penetrates through the first threaded hole in a threaded manner, the adjusting mechanism comprises a supporting component, a second bolt, a sliding component, a guide rail and a second magnet, the supporting component is connected to one side of the valve body shell, the second bolt is rotatably connected to one side of the valve body shell, the second bolt extends into the supporting component in a penetrating manner, and the second bolt penetrates through the sliding component in a threaded manner, the guide rail is installed in sliding assembly one side, the guide rail runs through and extends to in the valve body shell, the second magnet connect in guide rail one end, the second magnet with have magnetism between the case subassembly.
The utility model discloses an in the relief valve embodiment for elevator air conditioner control by temperature change, supporting component includes seal box and second sealing washer, seal box one end install in valve body shell one side, the second sealing washer connect in the seal box inner wall, the second sealing washer cup joint in second bolt surface.
The utility model discloses a relief valve embodiment for elevator air conditioner control by temperature change, the slip subassembly includes slide and slide rail, the slide rail install in the slide both ends, the second screw hole has been seted up to the slide internal surface, second bolt screw thread run through in the second screw hole.
The utility model discloses an in the safety valve embodiment for elevator air conditioner control by temperature change, the spout has been seted up to the seal box inner wall, the slide rail is the arc structure, slide rail sliding connection in the spout.
The utility model discloses an in the safety valve embodiment for elevator air conditioner control by temperature change, the third through-hole has been seted up to seal box one side, the third through-hole with second bolt clearance fit.
The utility model discloses a relief valve embodiment for elevator air conditioner control by temperature change, the case subassembly includes support, axostylus axostyle, pendulum rod, plugging block and first magnet, the support sets up to two symmetric distributions, the axostylus axostyle both ends rotate connect in the support is inboard, the pendulum rod install in the axostylus axostyle surface, the plugging block with first magnet connect in pendulum rod one side.
The utility model discloses a relief valve embodiment for elevator air conditioner control by temperature change, first magnet with the relative setting of second magnet like name magnetic pole, first magnet with the shutoff piece is located the support both sides.
The utility model discloses a relief valve embodiment for elevator air conditioner control by temperature change, the maintenance subassembly includes sealed lid, the second through-hole has been seted up to sealed internal surface of lid, first bolt slide run through in the second through-hole, sealed lid with the sealed board laminating mutually.
The utility model discloses a relief valve embodiment for elevator air conditioner control by temperature change, valve body shell one side intercommunication has the input tube, the shutoff piece is the ball-type structure, the shutoff piece with the laminating of input tube one end inner wall mutually, the first filter screen of input tube inner wall fixedly connected with.
The utility model discloses an in the relief valve embodiment for elevator air conditioner control by temperature change, the valve casing subassembly still includes output tube, second filter screen and first sealing washer, the output tube with valve body shell one side intercommunication, the second filter screen install in the output tube inner wall, first through-hole has been seted up to valve body shell one side, the guide rail slide run through in first through-hole, first sealing washer install in valve body shell inner wall, first sealing washer cup joint in the guide rail surface.
The utility model has the advantages that: the utility model discloses a relief valve for elevator air conditioner control by temperature change that obtains through above-mentioned design, when using, people rotate the second bolt with the hand, the second bolt can drive the slide through second screw hole and slide rail and move about, the slide can drive the guide rail and move about, the guide rail can drive the second magnet and move about, there is the repulsion between second magnet and the first magnet, the distance between second magnet and the first magnet is bigger, the repulsion is smaller, the pendulum rod can rotate on the support through the axostylus axostyle, first magnet and shutoff piece are around the mutual swing of axostylus axostyle, when the second magnet is closer to the first magnet, need the bigger medium pressure in the input tube just can make the shutoff piece keep away from the input tube, make the input tube communicate, discharge medium through the output tube, seal through the repulsion between second magnet and the first magnet, difficult ageing, thereby the long purpose of life has been reached, the relief valve makes the opening and closing piece be in normal close state through magnet repulsion, the aging is not easy, the control accuracy of the pressure is not easy to reduce, and the service life of the air conditioning element can be prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a safety valve for temperature control of an elevator air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a valve body mechanism provided in an embodiment of the present invention;
fig. 3 is a schematic structural view of a valve housing assembly according to an embodiment of the present invention;
fig. 4 is a schematic view of a first view angle structure of the valve core assembly according to the embodiment of the present invention;
fig. 5 is a schematic view of a second view angle structure of the valve core assembly according to the embodiment of the present invention;
fig. 6 is a schematic structural view of a maintenance assembly according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an adjusting mechanism according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a support assembly according to an embodiment of the present invention;
fig. 9 is a schematic structural view of a sliding assembly according to an embodiment of the present invention.
In the figure: 10-a valve body mechanism; 110-a valve housing assembly; 111-a valve body housing; 112-an input tube; 113-a first filter; 114-an output pipe; 115-a second filter; 116-a first seal ring; 117 — a first via; 118-a first threaded hole; 120-a spool assembly; 121-a support; 122-a shaft rod; 123-oscillating bar; 124-plugging block; 125-a first magnet; 130-a maintenance component; 131-a sealing cover; 132-a second via; 140-a first bolt; 150-a sealing plate; 20-an adjustment mechanism; 210-a support assembly; 211-a sealed box; 212-a second sealing ring; 213-third via; 214-a chute; 220-a second bolt; 230-a sliding assembly; 231-a slide plate; 232-a slide rail; 233-a second threaded hole; 240-guide rails; 250-second magnet.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are 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 work belong to the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1, the present invention provides a safety valve for controlling temperature of an elevator air conditioner, which includes a valve body mechanism 10 and an adjusting mechanism 20.
The adjusting mechanism 20 is fixedly connected to one side of the valve body mechanism 10, the valve body mechanism 10 is used for making the opening and closing member in a normally closed state, and the adjusting mechanism 20 is used for adjusting the pressure of the opening and closing member when the opening and closing member is opened.
Referring to fig. 1, 2 and 3, the valve body mechanism 10 includes a valve housing assembly 110, a valve core assembly 120, a maintenance assembly 130, a first bolt 140 and a sealing plate 150, the valve housing assembly 110 includes a valve body housing 111, the valve core assembly 120 is connected to an inner wall of the valve body housing 111, the sealing plate 150 is inserted into one end of the valve body housing 111, specifically, the sealing plate 150 is a rubber plate, the sealing plate 150 is located between the maintenance assembly 130 and the valve body housing 111, the first bolt 140 slidably penetrates through the maintenance assembly 130, a first threaded hole 118 is formed in one side of the valve body housing 111, and a thread of the first bolt 140 penetrates through the first threaded hole 118.
Referring to fig. 2, 3, 4, 5, and 7, the valve core assembly 120 includes a support 121, a shaft rod 122, a swing rod 123, a blocking block 124, and a first magnet 125, the support 121 is disposed in two symmetrical distributions, two ends of the shaft rod 122 are rotatably connected to the inside of the support 121, specifically, two ends of the shaft rod 122 are rotatably connected to the inside of the support 121 through bearings, the swing rod 123 is installed on the outer surface of the shaft rod 122, specifically, the swing rod 123 is fixedly installed on the outer surface of the shaft rod 122 by welding, the blocking block 124 and the first magnet 125 are connected to one side of the swing rod 123, specifically, the blocking block 124 and the first magnet 125 are fixedly connected to one side of the swing rod 123 by gluing, the blocking block 124 is a rubber block, the shaft rod 122 is used for rotating the swing rod 123 around the support 121, and the blocking block 124 and the first magnet 125 swing around the shaft rod 122.
In some embodiments, the first magnet 125 and the second magnet 250 are arranged with like poles facing each other, and the first magnet 125 and the block piece 124 are located on both sides of the support 121.
Referring to fig. 2, 3, 6, and 7, the maintenance assembly 130 includes a sealing cover 131, a second through hole 132 is formed in an inner surface of the sealing cover 131, a first bolt 140 slidably penetrates through the second through hole 132, the sealing cover 131 is attached to a sealing plate 150, one side of the valve body housing 111 is communicated with the input pipe 112, the plugging block 124 is of a spherical structure, the plugging block 124 is attached to an inner wall of one end of the input pipe 112, the inner wall of the input pipe 112 is fixedly connected with a first filter screen 113, the first bolt 140 is used for fixing the sealing cover 131 to the valve body housing 111, so as to facilitate maintenance of the safety valve, and the sealing plate 150 is used for sealing a joint between the sealing cover 131 and the valve body housing 111, thereby improving the sealing performance of the valve body housing 111.
In some specific embodiments, the valve housing assembly 110 further includes an output pipe 114, a second filter screen 115 and a first sealing ring 116, the output pipe 114 is communicated with one side of the valve housing 111, the second filter screen 115 is installed on the inner wall of the output pipe 114, specifically, the second filter screen 115 is installed on the inner wall of the output pipe 114 through welding and fixing, a first through hole 117 is formed in one side of the valve housing 111, the guide rail 240 slidably penetrates through the first through hole 117, the first sealing ring 116 is installed on the inner wall of the valve housing 111, specifically, the first sealing ring 116 is fixedly installed on the inner wall of the valve housing 111 through gluing, the first sealing ring 116 is a rubber ring, the first sealing ring 116 is sleeved on the outer surface of the guide rail 240, the output pipe 114 is used for discharging a medium to relieve pressure, the second filter screen 115 is used for filtering impurities in the medium, the first sealing ring 116 is used for sealing, and the sealing performance of the valve housing 111 is improved.
Referring to fig. 1, 3, and 7, the adjusting mechanism 20 includes a supporting component 210, a second bolt 220, a sliding component 230, a guide rail 240, and a second magnet 250, where the supporting component 210 is connected to one side of the valve body housing 111, the second bolt 220 is rotatably connected to one side of the valve body housing 111, specifically, the second bolt 220 is rotatably connected to one side of the valve body housing 111 through a bearing, the second bolt 220 extends into the supporting component 210 in a penetrating manner, the second bolt 220 is threaded through the sliding component 230, the guide rail 240 is installed at one side of the sliding component 230, the guide rail 240 extends into the valve body housing 111 in a penetrating manner, the second magnet 250 is connected to one end of the guide rail 240, specifically, the second magnet 250 is fixedly connected to one end of the guide rail 240 by gluing, and the second magnet 250 and the valve core component 120 have magnetism.
Referring to fig. 7, 8 and 9, the supporting assembly 210 includes a sealing box 211 and a second sealing ring 212, one end of the sealing box 211 is installed at one side of the valve body casing 111, specifically, one end of the sealing box 211 is installed at one side of the valve body casing 111 by welding and fixing, the second sealing ring 212 is connected to the inner wall of the sealing box 211, specifically, the second sealing ring 212 is fixedly connected to the inner wall of the sealing box 211 by gluing, the second sealing ring 212 is a rubber ring, the second sealing ring 212 is sleeved on the outer surface of the second bolt 220, the sliding assembly 230 includes a sliding plate 231 and sliding rails 232, the sliding rails 232 are installed at two ends of the sliding plate 231, specifically, the sliding rails 232 are installed at two ends of the sliding plate 231 by welding and fixing, the inner surface of the sliding plate 231 is provided with second threaded holes 233, the second bolt 220 is threaded through the second threaded holes 233, the second bolt 220 drives the sliding plate 231 to move left and right through the second threaded holes 233, the sliding plate 231 drives the sliding rail 231 to move left and right, the guide rail 240 drives the second magnet 250 to move left and right, a repulsive force exists between the second magnet 250 and the first magnet 125, the larger the distance between the second magnet 250 and the first magnet 125 is, the smaller the repulsive force is, and further, the pressure required when the input pipe 112 is communicated is adjusted.
In some specific embodiments, the inner wall of the sealing box 211 is provided with a sliding groove 214, the sliding rail 232 is an arc-shaped structure, the sliding rail 232 is slidably connected to the sliding groove 214, one side of the sealing box 211 is provided with a third through hole 213, the third through hole 213 is in clearance fit with the second bolt 220, and the sliding rail 232 and the sliding groove 214 are used for enabling the sliding plate 231 to move left and right along with the rotation of the second bolt 220.
The working principle of the safety valve for controlling the temperature of the elevator air conditioner is as follows: when the sealing device is used, a person rotates the second bolt 220 by hand, the second bolt 220 drives the sliding plate 231 to move left and right through the second threaded hole 233 and the sliding rail 232, the sliding plate 231 drives the guide rail 240 to move left and right, the guide rail 240 drives the second magnet 250 to move left and right, repulsion force exists between the second magnet 250 and the first magnet 125, the larger the distance between the second magnet 250 and the first magnet 125 is, the smaller the repulsion force is, the swing rod 123 can rotate on the support 121 through the shaft rod 122, the first magnet 125 and the sealing block 124 swing around the shaft rod 122 mutually, when the second magnet 250 is closer to the first magnet 125, the larger the medium pressure in the input pipe 112 is required to enable the sealing block 124 to be far away from the input pipe 112, so that the input pipe 112 is communicated, the medium is discharged through the output pipe 114, the second magnet 250 and the first magnet 125 are sealed through the repulsion force, and are not easy to age, thereby achieving the purpose of long service life, the safety valve enables the opening and closing part to be in a normally closed state through the repulsive force of the magnet, aging is not easy to occur, the control accuracy of pressure is not easy to reduce, and the service life of an air conditioning element can be prolonged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A safety valve for temperature control of an elevator air conditioner is characterized by comprising
The valve body mechanism (10), the valve body mechanism (10) comprises a valve housing assembly (110), a valve core assembly (120), a maintenance assembly (130), a first bolt (140) and a sealing plate (150), the valve housing assembly (110) comprises a valve body shell (111), the valve core assembly (120) is connected to the inner wall of the valve body shell (111), the sealing plate (150) is inserted into one end of the valve body shell (111), the sealing plate (150) is located between the maintenance assembly (130) and the valve body shell (111), the first bolt (140) penetrates through the maintenance assembly (130) in a sliding mode, a first threaded hole (118) is formed in one side of the valve body shell (111), and the first bolt (140) penetrates through the first threaded hole (118) in a threaded mode;
the adjusting mechanism (20) comprises a supporting component (210), a second bolt (220), a sliding component (230), a guide rail (240) and a second magnet (250), wherein the supporting component (210) is connected to one side of the valve body shell (111), the second bolt (220) is rotatably connected to one side of the valve body shell (111), the second bolt (220) penetrates through the supporting component (210) and extends into the supporting component (210), the second bolt (220) penetrates through the sliding component (230) in a threaded manner, the guide rail (240) is mounted on one side of the sliding component (230), the guide rail (240) penetrates through the valve body shell (111), the second magnet (250) is connected to one end of the guide rail (240), and magnetism exists between the second magnet (250) and the valve core component (120).
2. The safety valve for controlling the temperature of the air conditioner of the elevator as claimed in claim 1, wherein the support assembly (210) comprises a sealing box (211) and a second sealing ring (212), one end of the sealing box (211) is installed at one side of the valve body shell (111), the second sealing ring (212) is connected to the inner wall of the sealing box (211), and the second sealing ring (212) is sleeved on the outer surface of the second bolt (220).
3. The safety valve for controlling the temperature of the air conditioner of the elevator as claimed in claim 2, wherein the sliding assembly (230) comprises a sliding plate (231) and a sliding rail (232), the sliding rail (232) is mounted at two ends of the sliding plate (231), a second threaded hole (233) is formed in the inner surface of the sliding plate (231), and the second bolt (220) is threaded through the second threaded hole (233).
4. The safety valve for controlling temperature of an elevator air conditioner according to claim 3, wherein the inner wall of the sealing box (211) is provided with a sliding groove (214), the sliding rail (232) is of an arc-shaped structure, and the sliding rail (232) is slidably connected to the sliding groove (214).
5. The safety valve for controlling temperature of an elevator air conditioner according to claim 2, wherein a third through hole (213) is formed at one side of the sealing box (211), and the third through hole (213) is in clearance fit with the second bolt (220).
6. The safety valve for controlling the temperature of the air conditioner of the elevator as claimed in claim 1, wherein the valve core assembly (120) comprises a support (121), a shaft rod (122), a swing rod (123), a blocking block (124) and a first magnet (125), the support (121) is arranged in two symmetrical distribution, two ends of the shaft rod (122) are rotatably connected to the inner side of the support (121), the swing rod (123) is installed on the outer surface of the shaft rod (122), and the blocking block (124) and the first magnet (125) are connected to one side of the swing rod (123).
7. The safety valve for controlling temperature of an elevator air conditioner according to claim 6, wherein the first magnet (125) and the second magnet (250) are oppositely arranged with like magnetic poles, and the first magnet (125) and the blocking block (124) are positioned at two sides of the support (121).
8. The safety valve for controlling the temperature of an elevator air conditioner according to claim 1, wherein the maintenance assembly (130) comprises a sealing cover (131), a second through hole (132) is formed in the inner surface of the sealing cover (131), the first bolt (140) penetrates through the second through hole (132) in a sliding manner, and the sealing cover (131) is attached to the sealing plate (150).
9. The safety valve for the temperature control of the air conditioner of the elevator as claimed in claim 6, wherein an input pipe (112) is communicated with one side of the valve body shell (111), the blocking block (124) is of a spherical structure, the blocking block (124) is attached to the inner wall of one end of the input pipe (112), and a first filter screen (113) is fixedly connected to the inner wall of the input pipe (112).
10. The safety valve for controlling the temperature of an elevator air conditioner according to claim 1, wherein the valve housing assembly (110) further comprises an output pipe (114), a second filter (115) and a first sealing ring (116), the output pipe (114) is communicated with one side of the valve body housing (111), the second filter (115) is installed on the inner wall of the output pipe (114), one side of the valve body housing (111) is provided with a first through hole (117), the guide rail (240) slidably penetrates through the first through hole (117), the first sealing ring (116) is installed on the inner wall of the valve body housing (111), and the first sealing ring (116) is sleeved on the outer surface of the guide rail (240).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202120088902.0U CN214197419U (en) | 2021-01-13 | 2021-01-13 | Safety valve for temperature control of elevator air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202120088902.0U CN214197419U (en) | 2021-01-13 | 2021-01-13 | Safety valve for temperature control of elevator air conditioner |
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CN214197419U true CN214197419U (en) | 2021-09-14 |
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CN202120088902.0U Active CN214197419U (en) | 2021-01-13 | 2021-01-13 | Safety valve for temperature control of elevator air conditioner |
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2021
- 2021-01-13 CN CN202120088902.0U patent/CN214197419U/en active Active
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