A home elevator

Abstract

The present application discloses a household elevator, comprising a switching power supply, a first AC contactor, a second AC contactor, an uninterruptible power supply UPS, and a programmable logic controller PLC; the switching power supply is connected to an AC power supply through the first AC contactor, and the switching power supply is connected to the UPS through the second AC contactor; the elevator also comprises an ascending switch, a descending switch, an ascending button, a descending button, and a motor; the controller PLC connects the ascending switch and the descending switch; the elevator also comprises: an overweight detection device; the overweight detection device comprises: a fixed beam, the middle section of which is hinged to the top of the car; two reversing pulleys, respectively arranged at both ends of the fixed beam; the elevator also comprises: an elastic member, the elastic member is connected to the cable to carry the car, the elastic member has a rated deformation; and a loose position switch.

Description

Technical field:

[0001] The invention relates to a household elevator. Background technology:

[0002] An elevator is a transport device that serves several specific floors in a building and whose car runs on at least two rows of rigid tracks that are perpendicular to the horizontal plane or have an inclination angle of less than 15° to the plumb line.

[0003] With the innovation of technology and the development of society, a home elevator suitable for villa areas or small high-rise buildings has come into being, bringing great convenience to users' lives and allowing users to reach the designated floor safely and quickly.

[0004] Due to the structural characteristics of villas and small high-rise buildings, home elevators cannot be installed inside buildings as stably as commercial elevators. This requires that home elevators be different from existing elevators in terms of electrical control and structural design to ensure the smooth operation of home elevators. In addition, existing elevator power supplies often only use ordinary AC or DC power supplies. When the power supply fails, the elevator cannot be used normally and there are great safety hazards. Summary of the invention:

[0005] The embodiment of the present invention provides a home elevator, which solves the problem of the inability to continuously supply power and the power supply safety of the home elevator in the prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A household elevator comprises a switching power supply, a first AC contactor, a second AC contactor, an uninterruptible power supply UPS, and a programmable logic controller PLC;

[0008] The switching power supply is connected to the AC power supply through the first AC contactor, and the switching power supply is connected to the UPS through the second AC contactor;

[0009] Wherein, the first AC contactor includes a main contact, two long-open auxiliary contacts, and a normally closed auxiliary contact; the second AC contactor includes at least one main contact and two long-open auxiliary contacts; and the main contact of the first AC contactor is arranged between the neutral line and the live line of the AC power supply, and the two normally open auxiliary contacts of the first AC contactor are respectively arranged on the neutral line and the live line of the AC power supply, and the normally closed auxiliary contact of the first AC contactor is connected to the main contact of the second AC contactor, and an emergency switch is arranged at the connection point; the two normally open auxiliary contacts of the second AC contactor are respectively arranged on the neutral line and the live line of the AC power supply;

[0010] The emergency switch is used to control the switching between the UPS and the AC power supply. The switch power supply is connected to a PLC, and the PLC is used to control the running speed and / or direction of the elevator motor.

[0011] The switching power supply is connected to a PLC, specifically:

[0012] The switching power supply is connected to the PLC via a live wire interface and a neutral wire interface of the switching power supply; wherein the switching power supply is provided with a live wire interface, a neutral wire interface, an output positive interface and an output negative interface;

[0013] A first fuse is provided on the positive output interface of the switching power supply, and the first fuse is used to protect the positive output interface.

[0014] A second fuse is provided between the PLC and the switching power supply, and the second fuse is used to protect the PLC.

[0015] An air circuit breaker is provided between the live wire interface of the switching power supply and the second AC contactor.

[0016] A brake is provided on the PLC, the brake is used for emergency braking, and an electromagnetic relay is provided between the PLC and the brake.

[0017] The home elevator also includes an up switch, a down switch, an up button, a down button, and a motor;

[0018] The controller PLC is connected to the rising switch and the falling switch;

[0019] The ascending switch changes its state based on the triggering of the ascending button, so that the controller controls the motor of the elevator to rotate in the first direction according to the change of the ascending switch state, thereby starting the ascending process of the elevator;

[0020] The descending switch changes its state based on the triggering of the descending button, so that the controller controls the elevator motor to rotate in the second direction according to the change of the descending switch state, thereby starting the descending process of the elevator.

[0021] The elevator further comprises: an overweight detection device;

[0022] The overweight detection device comprises: a fixed beam, the middle section of which is hinged to the top of the car;

[0023] Two reversing pulleys are respectively arranged at two ends of the fixed beam;

[0024] A lifting member connected to the fixed beam, comprising a drum with a rope groove and a cable wound around the drum, wherein the drum is arranged between two reversing pulleys and offset from the midpoint of a line connecting the two reversing pulleys, and the cable extends upward after being reversing by the two reversing pulleys, and the lengths of the cables on both sides of the drum are different;

[0025] A connecting seat, one end of the motor is connected to the reel, and the other end extends to the end of the fixed beam away from the reel and forms an indicating end; the motor is connected to the fixed beam through the connecting seat;

[0026] A displacement monitoring component is used to monitor the displacement of the indicating end, and the displacement monitoring component is electrically connected to the controller.

[0027] The displacement monitoring component includes a contact switch, which is arranged at one of the indicating end or the car. A trigger part is arranged on the other of the indicating end or the car. When the displacement of the indicating end is greater than a set threshold, the trigger part triggers the contact switch.

[0028] The elevator further comprises:

[0029] an elastic member connected to the cable to support the car, the elastic member having a rated deformation;

[0030] A loose position switch, the loose position switch is used to detect a change in the elastic member below the rated deformation;

[0031] An actuator is connected to the elastic member, the position of the actuator changes following the deformation of the elastic member, and the position of the actuator includes a first position interval that turns on the loose position switch and a second position interval that turns off the loose position switch.

[0032] The embodiment of the present invention realizes switching between a common AC power supply and a standby power supply by cooperating with an emergency switch, a first AC contactor, and a second AC contactor provided on the home elevator, so that the switch power supply is always in an on state, thereby continuously supplying power to the home elevator; the action of the home elevator is controlled by a PLC controller; the emergency braking of the elevator is realized by cooperating with the PLC controller and the brake, thereby increasing the reliability and safety of the elevator; the power supply line is protected by cooperating with a fuse and a circuit breaker, and the invention has the advantages of safety, reliability, and fast response speed. Description of the drawings:

[0033] Figure 1 A power supply control circuit diagram for an elevator provided in an embodiment of the present invention.

[0034] Figure 2A schematic structural diagram of a household elevator provided in an embodiment of the present invention.

[0035] Figure 3 for Figure 2 A magnified schematic diagram of area A in the middle.

[0036] Figure 4 A schematic diagram of the structure of a motor and a fixed beam provided in an embodiment of the present invention.

[0037] Figure 5 for Figure 2 Enlarged schematic diagram of area B in the middle. Specific implementation method:

[0038] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. Figure 1 As shown, the elevator power control circuit provided in an embodiment of the present invention includes a switching power supply, which is used to convert AC power into a power supply suitable for a motor and a PLC (Programmable Logic Controller) of a home elevator, for example, converting AC power into 24 volt DC power and outputting it.

[0039] In one embodiment of the present application, the PLC controller is used to control the motor of a home elevator so that the elevator works according to preset rules. Specifically, the PLC controller model is SR20.

[0040] like Figure 1 As shown, the live wire L and the neutral wire N of the AC power supply are connected to the switching power supply through the first AC contactor KM1, and the uninterruptible power supply (UPS) is connected to the switching power supply through the second AC contactor KM2.

[0041] Specifically, in addition to the first AC contactor KM1 connected to the live wire L and the neutral wire N of the AC power supply, a backup power supply is also provided. An emergency switch is provided between the backup power supply and the second AC contactor KM2. The emergency switch is used to switch the backup power supply with the normal AC power supply based on human triggering or based on the control of the controller. For example, after the normal AC power supply is powered off, the emergency switch is controlled to close, so that the UPS is connected to the switch power supply through the second AC contactor KM2.

[0042] It should be noted that the AC contactor includes main contacts, normally open auxiliary contacts and normally closed auxiliary contacts. The main contacts are used to control the circuit and the auxiliary contacts are used to conduct the control circuit. The main contacts are generally normally open contacts, while the auxiliary contacts include normally open contacts and normally closed contacts. The power of the AC contactor comes from the magnetic field generated by the AC passing through the coil with an iron core. The electromagnetic iron core is composed of two mountain-shaped thin silicon steel sheets, one of which is a fixed iron core with a coil. In order to stabilize the magnetic force, a short-circuit ring is added to the suction surface of the iron core. After the AC contactor loses power, it relies on a spring to reset. The other is a movable iron core, which has the same structure as the fixed iron core and is used to drive the main contacts and auxiliary contacts to close and open. The working principle of the contactor is that when the contactor coil is energized, the coil current will generate a magnetic field. The generated magnetic field causes the static iron core to generate electromagnetic attraction to attract the moving iron core, and drive the AC contact point to move, the normally closed contact is disconnected, and the long open contact is closed, and the two are linked. When the coil is de-energized, the electromagnetic attraction disappears, and the armature is released under the action of the release spring, causing the contacts to recover, the normally open contacts to open, and the normally closed contacts to close.

[0043] like Figure 1 As shown, the first AC contactor KM1 includes a main contact, two long-open auxiliary contacts, and a normally closed auxiliary contact, and the second AC contactor KM2 includes a main contact and two long-open auxiliary contacts. The main contact of the first AC contactor KM1 is arranged between the neutral line N and the live line L, and the two normally open auxiliary contacts of the first AC contactor KM1 are arranged on the neutral line N and the live line L respectively. The normally closed auxiliary contact of the first AC contactor KM1 is connected to the main contact of the second AC contactor KM2, and an emergency switch is arranged at the connection point. The two normally open auxiliary contacts of the second AC contactor KM2 are arranged on the neutral line N and the live line L. It can be seen that the second AC contactor KM1 is connected in series with the UPS and then in parallel with the first AC contactor KM1, and the emergency switch is arranged between the first AC contactor KM1 and the second AC contactor KM2.

[0044] In one embodiment of the present application, a first fuse FU1 is provided on the positive output interface of the switching power supply, and the first fuse FU1 is used to protect the positive output interface. A second fuse FU2 is provided between the PLC controller and the switching power supply, and the second fuse FU2 is used to protect the PLC controller.

[0045] Figure 1 In the embodiment, a brake YBK is also provided on the PLC controller, and the brake is used to realize emergency braking of the home elevator. An electromagnetic relay KA is provided between the PLC controller and the brake YBK, and the electromagnetic relay KA is used to connect the PLC controller and the brake YBK to increase reliability.

[0046] In addition, an air circuit breaker QF1 is provided at the connection between the switching power supply and the PLC, the first AC contactor KM1, and the second AC contactor KM2. The air circuit breaker QF1 is used to provide protection for the switching power supply.

[0047] The working process of the elevator power supply control circuit is described in detail below.

[0048] Under normal circumstances, the switching power supply is connected to the live wire and neutral wire of the AC power supply through its live wire interface and neutral wire interface. Therefore, the normal 220V AC power supply is connected to the switching power supply through the main contact and the normally open auxiliary contact of the first AC contactor KM1. The switching power supply supplies power to the elevator through its positive output interface and negative output interface. In this case, the switching power supply supplies power to the elevator normally, and the elevator can operate normally. When the normal 220V AC power supply cannot supply power, such as when the live wire L or the neutral wire N fails and is disconnected, the emergency switch is manually triggered or controlled by the controller to close. The first AC contactor KM1, the second AC contactor KM2 and the emergency switch work together, the normally open contact of the first AC contactor is disconnected, and the normally closed contact enters the working state; the second AC contactor is energized to disconnect the switching power supply from the neutral line N and the live line L, and connect the switching power supply to the backup power supply. The backup power supply is a UPS power supply. The backup power supply is used to connect the switching power supply, so that the elevator and PLC controller can be continuously powered, thereby ensuring the normal use and operation of the elevator. The elevator will not stop suddenly, which improves the reliability and safety of the elevator.

[0049] A household elevator provided by an embodiment of the present invention utilizes an AC contactor to generate a magnetic field to control a load through current flowing through the contactor, and cooperates with the closing and opening of an emergency switch to realize the switching of ordinary AC power supply and backup power supply. The switching power supply remains in an on state to ensure that the switching power supply always supplies power to the household elevator, so that the household elevator can be powered in real time.

[0050] In one embodiment of the present application, the controller PLC controls the ascent and descent of the elevator through the ascent switch, descent switch, and motor connected thereto.

[0051] Specifically, the up button and down button of the elevator are connected to the up switch and down switch respectively, the up switch and down switch are connected to the controller PLC, and the PLC is connected to the motor through the frequency converter.

[0052] When the user triggers the up switch button, the state of the up switch changes, such as the up switch is closed. Based on the change in the up switch state, the PLC controls the motor to rotate in one direction to make the elevator go up. Similarly, when the user triggers the down switch button, the state of the down switch changes, such as the down switch is closed. Based on the change in the down switch state, the PLC controls the motor to rotate in the other direction to make the elevator go down. Figure 2-4 As shown, an embodiment of the present application provides an overweight detection device, comprising: a fixed beam 1, the middle section of the fixed beam 1 is hinged to the top of the car 2; two reversing pulleys 3, respectively arranged at the two ends of the fixed beam 1; a lifting member, connected to the fixed beam 1, comprising a drum 4 with a rope groove 6, a cable 5 wound on the drum 4, and a motor 7 connected to the drum 4, the drum 4 is arranged between the two reversing pulleys 3, and is offset from the midpoint of the line connecting the two reversing pulleys 3, the cable 5 extends upward after being reversing by the two reversing pulleys 3, and the lengths of the cables 5 on both sides of the drum 4 are different; a driving member, comprising a motor 7 and a connecting seat 8, one end of the motor 7 is connected to the drum 4, and the other end extends to the end of the fixed beam 1 away from the drum 4, one end of the motor 7 is connected to the fixed beam 1 through the connecting seat 8, and the other end forms an indicating end 9; a displacement monitoring member, the monitoring member is suitable for monitoring the displacement of the indicating end 9, and the displacement monitoring member 9 is electrically connected to the controller.

[0053] In the embodiment of the present application, since the drum 4 is offset from the midpoint of the line connecting the two reversing pulleys 3, the lengths of the cables 5 on both sides of the drum 4 are different, and thus under the load of the car 2, the length deformations of the cables 5 on both sides of the drum 4 are different, which easily causes the car 2 to tilt. Therefore, by providing a fixed beam 1 rotatably connected to the car 2, the reversing pulley 3 is provided on the fixed beam 1, and then when the length deformations of the cables 5 on both sides of the drum 4 are different, the fixed beam 1 can rotate relative to the car 2, and then the fixed beam 1 can rotate to adapt to the difference in the length changes of the cables 5 on both sides of the drum 4. At the same time, the guide wheel of the car 2 cooperates with the middle of the slide rail of the indoor elevator to keep the car 2 roughly balanced.

[0054] When people or objects enter the indoor elevator, the load of the car 2 increases, causing the cable 5 to elastically deform and stretch. Since the lengths of the cables 5 on both sides of the drum 4 are different, the length changes of the cables 5 on both sides of the drum 4 are different, which in turn causes the fixed beam 1 to tilt relative to the car 2, and the indicating end 9 to move relative to the car 2. When the displacement of the indicating end 9 exceeds the set threshold, it can be known that the fixed beam 1 has rotated beyond a certain angle, and it can be known that the length difference of the cables 5 on both sides of the drum 4 has reached a certain change, and it can be known that the load of the car 2 exceeds a certain weight, so the displacement of the indicating end 9 can be monitored to monitor the load of the car 2.

[0055] In the embodiment of the present application, the displacement monitoring member can be a displacement sensor, which can be installed at the top motor 7 of the car 2. There is no need to set a mounting structure of a weighing sensor at the load-bearing structure of the car 2, so the structure is simpler. In addition, the present invention monitors the load of the car 2 by monitoring the displacement of the indicating terminal 9. Compared with the weighing sensor, the working state of the displacement sensor is more stable and accurate.

[0056] More specifically, the connection seat 8 is disposed at one end where the motor 7 is connected to the reel 4. Figure 3 and Figure 4 As shown, since the reel 4 is connected to the motor 7, by arranging the connection seat 8 at one end of the motor 7 close to the reel 4, the connection seat 8 can be close to the center of gravity between the reel 4 and the motor 7, thereby making the lifting member more stable. In addition, when the entire indoor elevator is in use, the reel 4 will generate a certain horizontal moment due to the horizontal force transmitted to the reel 4 by the cable 5. The connection seat 8 is arranged at the end of the motor 7 close to the reel 4, which can shorten the force arm of the horizontal force generated by the reel 4 and reduce the moment generated by the horizontal force generated by the reel 4 on the connection seat 8.

[0057] In the embodiments of the present application, Figure 3 and Figure 4 As shown, the motor 7 includes a gearbox 701 connected to the reel 4, a motor 702 connected to the gearbox 701, the gearbox 701 is connected to the fixed beam 1 through a connecting seat 8, and the end of the motor 702 away from the gearbox 701 forms an indication end 9. The end of the motor 702 away from the gearbox 701 forms the indication end 9. Since the car 2 of the home indoor elevator is small, the motor 702 is extended to the car 2 on the other side of the reel 4 to facilitate the installation of the motor 702. At the same time, the indication end 9 can be far away from the hinge point between the fixed beam 1 and the car 2. When the fixed beam 1 rotates a certain angle, the indication end 9 has a relatively large displacement, which is more conducive to monitoring.

[0058] In the embodiment of the present application, the connection seat 8 includes: a flat plate portion 801, connected to the fixed beam 1; a vertical plate portion 802, connected to the top of the flat plate portion 801, and connected to the end of the gearbox 701 away from the motor 702. In this way, when installing the motor 7, it is only necessary to connect the flat plate portion 801 to the fixed beam 1 and the flat plate portion 801 to the gearbox 701. Among them, the connection seat 8 is L-shaped as a whole, and the connection seat 8 is connected to the fixed beam 1 and the gearbox 701 respectively by bolts. The connection seat 8 is arranged at the end of the gearbox 701 away from the motor 702, which can facilitate the connection of the connection seat 8 to the fixed beam 1 on the upper side of the car 2.

[0059] In the embodiment of the present application, the displacement monitoring component includes a contact switch 10, which is arranged at one of the indicating end 9 or the car 2, and a triggering part 11 is arranged on the other of the indicating end 9 or the car 2, and when the displacement of the indicating end 9 is greater than a set threshold, the triggering part 11 triggers the contact switch 10. By setting the displacement monitoring component as the contact switch 10, the indicating end 9 corresponding to the car 2 being in a rated load state can be moved to a position, so that the triggering part 11 contacts the contact switch 10 and triggers the contact switch 10, thereby monitoring whether the car 2 is overloaded.

[0060] In the embodiments of the present application, Figure 3 and Figure 4 As shown, the contact switch 10 is connected to the car 2; the monitoring mechanism also includes a mounting bracket 12 connected to the indicating end 9, and the mounting bracket 12 is provided with a threaded hole. The locking mechanism also includes a push rod 13 screwed through the threaded hole, and the push rod 13 is substantially arranged along the tangent direction of the rotation of the indicating end 9, and the end of the push rod 13 facing the contact switch 10 forms a triggering part 11. Among them, the tangent direction can be that when the triggering part 11 triggers the contact switch, the push rod 13 and the triggering part 11 are tangent to a circle with the hinge point of the fixed beam 1 as the center.

[0061] By arranging the contact switch 10 on the car 2, the circuit of the contact switch 10 can be stabilized. Moreover, the trigger part 11 is formed by the end of the push rod 13, so that the trigger part 11 can accurately trigger the contact switch 10. By rotating the push rod 13 and adjusting the distance between the trigger part 11 and the contact switch 10, the overload weight of the car 2 can be adjusted.

[0062] In the embodiment of the present application, the contact switch 10 may be provided on the motor 702, and the trigger part 11 may be provided on the car 2. Moreover, the setting of the trigger part 11 is not limited to the form of the push rod 13. In an alternative embodiment, the trigger part 11 may also be provided as a protrusion fixedly connected to the motor 702, or a protrusion connected to the car 2.

[0063] like Figure 5 As shown, the home elevator further includes: an elastic member 14, an actuator 15 and a loose position switch 16. The loose position switch 16 is arranged in the deformation direction of the elastic member 14 which is lower than the rated deformation. The specific arrangement of the loose position switch 16 can detect the situation that the deformation of the elastic member 14 is lower than the rated deformation, that is, the elastic member 14 changes from a normal squeezed state within the rated deformation range to an abnormal state where the deformation is lower than the rated deformation, and the structural morphological change of the elastic member 14 triggers the loose position switch 16.

[0064] The actuator 15 is connected to the elastic member 14, and the position of the actuator 15 changes with the deformation of the elastic member 14. The position of the actuator 15 includes a first position interval that turns on the loose position switch 16 and a second position interval that turns off the loose position switch 16. In order to ensure that the loose position switch 16 can be triggered relatively accurately when the deformation of the elastic member 14 is lower than the rated deformation, the actuator 15 is added in this embodiment. The actuator 15 and the elastic member 14 are connected so that the actuator 15 can express the deformation of the elastic member 14, and the range of motion of the actuator 15 is set to the first position interval and the second position interval following the change of the elastic member 14. The actuator 15 in the first position interval indicates that the deformation of the elastic member 14 is lower than the rated deformation, and the actuator 15 can trigger the loose position switch 16; on the contrary, the actuator 15 in the second position interval indicates that the deformation of the elastic member 14 is within the rated deformation range, and the actuator 15 cannot trigger the loose position switch 16, so that the loose position switch 16 is in a disconnected state.

[0065] It is understandable that the loose position switch 16 can be a limit switch that contacts the actuator 15, or a photoelectric proximity switch that does not contact the actuator 15. The specific model and installation method are selected according to the functions of existing products and can be used flexibly.

[0066] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0067] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A home elevator, characterized in that: It includes a switching power supply, a first AC contactor, a second AC contactor, an uninterruptible power supply UPS, a programmable logic controller PLC, and an overweight detection device; The switching power supply is connected to the AC power supply through the first AC contactor, and the switching power supply is connected to the UPS through the second AC contactor; Wherein, the first AC contactor includes a main contact, two long-open auxiliary contacts, and a normally closed auxiliary contact; the second AC contactor includes at least one main contact and two long-open auxiliary contacts; and the main contact of the first AC contactor is arranged between the neutral line and the live line of the AC power supply, and the two normally open auxiliary contacts of the first AC contactor are respectively arranged on the neutral line and the live line of the AC power supply, the normally closed auxiliary contact of the first AC contactor is connected to the main contact of the second AC contactor, and an emergency switch is arranged at the connection point between the normally closed auxiliary contact of the first AC contactor and the main contact of the second AC contactor; the two normally open auxiliary contacts of the second AC contactor are respectively arranged on the neutral line and the live line of the AC power supply; The emergency switch is used to control the switching of the UPS and the AC power supply, the switch power supply is connected to a PLC, the PLC is connected to an elevator motor, and the PLC is used to control the running speed and / or direction of the elevator motor; A brake is provided on the PLC, the brake is used for emergency braking, and an electromagnetic relay is provided between the PLC and the brake; The overweight detection device comprises: a fixed beam, two reversing pulleys, a lifting member, a connecting seat and a displacement monitoring member; the middle section of the fixed beam is hinged to the top of the car; the two reversing pulleys are respectively arranged at the two ends of the fixed beam; the lifting member is connected to the fixed beam, comprises a drum with a rope groove, and a cable wound around the drum, the drum is arranged between the two reversing pulleys, and is offset from the midpoint of the line connecting the two reversing pulleys, the cable extends upward after being reversing by the two reversing pulleys, and the lengths of the cables on both sides of the drum are different; one end of the motor is connected to the drum, and the other end extends to the end of the fixed beam away from the drum to form an indicating end; the motor is connected to the fixed beam through the connecting seat; the displacement monitoring member is used to monitor the displacement of the indicating end, and the displacement monitoring member is electrically connected to the controller.

2. A home elevator according to claim 1, characterized in that: The switching power supply is connected to a PLC, specifically: The switching power supply is connected to the PLC via a live wire interface and a neutral wire interface of the switching power supply; wherein the switching power supply is provided with a live wire interface, a neutral wire interface, an output positive interface and an output negative interface; A first fuse is provided on the output positive interface of the switching power supply, and the first fuse is used to protect the output positive interface; A second fuse is provided between the PLC and the switching power supply, and the second fuse is used to protect the PLC.

3. A home elevator according to claim 2, characterized in that: An air circuit breaker is provided between the live wire interface of the switching power supply and the second AC contactor.

4. The home elevator according to claim 1, characterized in that: The home elevator also includes an up switch, a down switch, an up button, a down button, and a motor; The controller PLC is connected to the rising switch and the falling switch; The ascending switch changes its state based on the triggering of the ascending button, so that the controller controls the motor of the elevator to rotate in the first direction according to the change of the ascending switch state, thereby starting the ascending process of the elevator; The descending switch changes its state based on the triggering of the descending button, so that the controller controls the elevator motor to rotate in the second direction according to the change of the descending switch state, thereby starting the descending process of the elevator.

5. The home elevator according to claim 1, characterized in that: The displacement monitoring component includes a contact switch, which is arranged at one of the indicating end or the car. A trigger part is arranged on the other of the indicating end or the car. When the displacement of the indicating end is greater than a set threshold, the trigger part triggers the contact switch.

6. The home elevator according to claim 1, characterized in that: The elevator further comprises: an elastic member connected to the cable to support the car, the elastic member having a rated deformation; A loose position switch, the loose position switch is used to detect a change in the elastic member below the rated deformation; An actuator is connected to the elastic member, the position of the actuator changes following the deformation of the elastic member, and the position of the actuator includes a first position interval that turns on the loose position switch and a second position interval that turns off the loose position switch.

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