CN113963992A

CN113963992A - Mute electromagnetic relay and refrigeration equipment

Info

Publication number: CN113963992A
Application number: CN202010714658.4A
Authority: CN
Inventors: 张海鹏; 丁龙辉; 孙敬龙; 潘毅广; 齐聪山
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2022-01-21

Abstract

The invention relates to the technical field of relays and refrigeration equipment, and discloses a mute electromagnetic relay and refrigeration equipment, wherein the mute electromagnetic relay comprises: a base is arranged in the shell; the elastic sheet base is connected to the base; the electromagnet base is connected to the base, and the electromagnet base is connected with the elastic sheet base; the fixed elastic sheet is connected with the elastic sheet base and is provided with a static contact; the armature plate is rotatably arranged between the elastic sheet base and the electromagnet base; the movable spring plate is connected to the armature plate, a movable contact is arranged on the movable spring plate, and a static contact are correspondingly arranged; the electromagnet is connected with the electromagnet base; the first vibration isolation is attached to the outer side walls of the elastic sheet base and the electromagnet base; the second vibration isolation is connected to the base. According to the vibration isolation structure, the first vibration isolation and the second vibration isolation are arranged, so that the vibration noise of the electromagnetic relay and the refrigeration equipment is reduced, and the user experience is greatly improved; the overall size of the electromagnetic relay is reduced by the arrangement of the action cavity and the armature plate.

Description

Mute electromagnetic relay and refrigeration equipment

Technical Field

The invention relates to the technical field of relays and refrigeration equipment, in particular to a mute electromagnetic relay and refrigeration equipment.

Background

The electromagnetic relay is used as an important control component in refrigeration equipment and is mainly responsible for starting and stopping control of high-voltage and high-current components such as a compressor, a defrosting heating wire, an ice crushing motor and the like. The operating principle of the electromagnetic relay is that when the electromagnet is electrified, the armature is attracted down to close the working circuits of the two contacts, when the electromagnet is powered off, the armature is pulled up by the spring to cut off the working circuits. It is usually applied in automatic control circuit, it is an automatic switch which uses small current to control large current, so it plays the role of automatic regulation, safety protection, switching circuit, etc. As shown in fig. 1, the working circuit of the electromagnetic relay is composed of a low-voltage control circuit and a high-voltage working circuit. The low-voltage control circuit consists of an electromagnet, an armature, a tension spring and a low-voltage power supply E1; the high-voltage working circuit is composed of load, power supply E2, and the fixed and movable contacts equivalent to switches. In a normal state, the spring is in a stretching state, and the armature is not in contact with the electromagnet. When the low-voltage control circuit is disconnected, no current flows in a coil of the electromagnet, the iron core has no ferromagnetism, the armature cannot be attracted down, the movable contact and the static contact are in a disconnected state, and the working circuit is disconnected; when the control circuit is closed, the coil of the electromagnet has current, the iron core has ferromagnetism, and the armature can overcome the pulling force of the tension spring to move towards the electromagnet under the attraction of the magnet and is contacted with the iron core, so that the movable contact and the static contact are in a switch-on state, and the working circuit is switched on; when the control circuit is disconnected, no current passes through the coil of the electromagnet, the iron core is demagnetized, and the armature returns to the initial position under the action of the tension spring, so that the movable contact and the static contact are in a disconnected state; therefore, the purpose of controlling the on-off of the high-voltage working circuit is achieved by changing the existence (or the magnitude) of the current in the low-voltage control circuit.

When the control circuit is closed, the attraction force of the electromagnet on the armature can enable the armature to approach the electromagnet at a certain acceleration until the armature is completely attracted, the impact of the armature on the iron core of the electromagnet can bring great vibration noise, and meanwhile, the impact of a movable contact on a fixed contact can also generate great vibration noise; when the control circuit is disconnected, the armature returns to the initial position under the action of the elastic force, and impacts the yoke iron to generate noise; because the electromagnetic relay used on the refrigerator electric control board requires a smaller size, most of the original pieces providing elastic force are spring pieces, and the spring pieces can easily generate large vibration noise due to the cantilever structure when returning to the original shape.

With the pursuit of high-quality life, the refrigerator with low noise and stable operation becomes the most basic requirement of users for the refrigerator, and is a basic factor for measuring the quality of the refrigerator. Whether the sound signal is stable in the running process of the refrigerator is also a decisive factor of a user for sound perception, and sudden changes and burrs of the sound signal in the running process of the refrigerator serve as jitter and roughness evaluation contents in sound quality basic parameters, so that the experience of the user on the refrigerator is influenced to a great extent; the electromagnetic relay is one of the noise sources that affect the stability of the sound signal.

The urban population is increased, and the use environment of the refrigerator is changed from the previous kitchen to a living room, a dining room, a balcony and even a bedroom. The NPS data in 2019 show that complaints of transient noise suddenly appearing on the refrigerator by users are obviously increased (for example, the users feed back the sound that the refrigerator can drop things or ice blocks); the electromagnetic relay is used as a control component of an electric device of the refrigerator, the circuit switching noise is high, the occurrence frequency is high, and certain users are dissatisfied; through experimental tests, the noise is generally 45-60dB, the noise difference between the refrigerator and the stable operation noise is 35-40dB, and the noise difference between the refrigerator and the stable operation noise is large, so that the relay can have obvious sound mutation during switching, and the relay is easy to perceive by a user to cause complaints.

Disclosure of Invention

In some embodiments of the present application, a mute electromagnetic relay and a refrigeration device are provided, the mute electromagnetic relay includes a first vibration isolation and a second vibration isolation, and the transmission of vibration in three directions is limited by arranging the first vibration isolation and the second vibration isolation on a base, a spring plate base and an electromagnet base, so as to reduce the vibration noise of the electromagnetic relay of the present application.

In some embodiments of this application, add first vibration isolation, will first vibration isolation is attached to the shell fragment base with the lateral wall of electro-magnet base, in order to restrict the shell fragment base with the electro-magnet base passes the vibration in first direction and second direction for the electromagnetic relay of this application has reduced vibration noise.

In some embodiments of the present application, the second vibration isolation is added, and the second vibration isolation is connected to the base, so as to limit the transmission of the vibration of the spring plate base and the electromagnet base in the third direction, and thus the electromagnetic relay of the present application reduces the vibration noise.

In some embodiments of the present application, the first direction is parallel to the top surface of the elastic sheet base or the top surface of the electromagnet base, the second direction is parallel to the top surface of the elastic sheet base or the top surface of the electromagnet base, the first direction and the second direction are perpendicular to each other, and the third direction is perpendicular to the top surface of the base.

In some embodiments of this application, improved the electro-magnet base the inside action chamber that is provided with of electro-magnet base will the shared space of contact or the separation action of first connecting plate and electro-magnet sets up the action intracavity to reduce electromagnetic relay's in this application volume.

In some embodiments of this application, improved the mode of action of armature plate, will first connecting plate is in the action of third direction is turned into the second connecting plate is at the perpendicular to the action of third direction has improved the utilization ratio of armature plate space in the third direction has reduced the armature plate is at the perpendicular to shared space volume in the third direction, and then has reduced electromagnetic relay's volume in this application.

In some embodiments of the present application, a movable contact and a fixed contact are modified, the fixed contact and the movable contact are respectively disposed on the fixed spring plate and the movable spring plate to buffer the impact of the fixed contact and the movable contact, and the fixed spring plate is connected to a spring plate base to transmit the vibration generated by the impact of the fixed contact and the movable contact to the spring plate base.

In some embodiments of the application, a yoke is modified to extend one end of the yoke to the bent portion, and the yoke is connected to the electromagnet adjacent to the first connecting plate to restrict rotation of the armature plate.

In some embodiments of the present application, there is provided a mute electromagnetic relay, comprising: the device comprises a shell, a base and a connecting piece, wherein the base is arranged in the shell; a dome base connected to the base; the electromagnet base is connected to the base and is connected with the elastic sheet base; the fixed elastic sheet is connected with the elastic sheet base and is provided with a static contact; the armature plate is rotatably arranged between the elastic sheet base and the electromagnet base; the movable elastic sheet is connected to the armature plate, a movable contact is arranged on the movable elastic sheet, and the movable contact is arranged corresponding to the static contact; the electromagnet is connected to the electromagnet base; the first vibration isolation is attached to the outer side walls of the elastic sheet base and the electromagnet base so as to limit the elastic sheet base and the electromagnet base from transmitting vibration in a first direction and a second direction; and the second vibration isolation is connected to the base so as to limit the transmission of vibration of the elastic sheet base and the electromagnet base in a third direction.

In some embodiments of the present application, the first isolation is connected to the second isolation.

In some embodiments of the present application, an actuating chamber is formed in the electromagnet base, and an iron core of the electromagnet extends into the actuating chamber.

In some embodiments of the present application, the armature plate includes: the first connecting plate is inserted into the action cavity and is arranged corresponding to the electromagnet; and a second connecting plate connected to the first connecting plate, wherein a bent portion is formed at a connection portion of the first connecting plate and the second connecting plate.

In some embodiments of the present application, the movable spring plate is connected to a spring plate connecting plate, and the spring plate connecting plate is connected to the second connecting plate.

In some embodiments of the present application, the first connecting plate has a length that is less than a length of the second connecting plate.

In some embodiments of the present application, there is provided a mute electromagnetic relay, further comprising: a yoke having one end extended to the bent portion and connected to the electromagnet adjacent to the first connection plate to restrict rotation of the armature plate.

In some embodiments of the present application, when the electromagnet obtains magnetism, the first connecting plate moves toward the electromagnet, and the second connecting plate moves toward the fixed spring piece, so that the movable contact and the fixed contact are closed.

In some embodiments of the present application, when the electromagnet loses magnetism, the first connecting plate moves away from the electromagnet, and the second connecting plate moves toward the yoke, so that the movable contact is disconnected from the stationary contact.

In some embodiments of the present application, a refrigeration device is further provided, which includes the above-mentioned mute electromagnetic relay, where the mute relay is used for controlling the start and stop of a high-voltage large-current component in the refrigeration device.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

fig. 2 is a schematic structural diagram of a mute electromagnetic relay and a refrigeration device according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a mute electromagnetic relay and a refrigeration apparatus according to an embodiment of the present invention.

In the figure, the position of the upper end of the main shaft,

100. a base; 110. a spring plate base; 111. a mounting cavity; 120. an electromagnet base; 121. an action cavity;

200. fixing the elastic sheet; 210. a stationary contact;

300. an armature plate; 310. a first connecting plate; 320. a second connecting plate;

400. a movable spring plate; 410. a movable contact; 420. the elastic sheet connecting plate;

500. an electromagnet; 510. a yoke;

610. first vibration isolation; 620. second vibration isolation.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

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 application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 2, according to some embodiments of the present application, the mute electromagnetic relay includes a housing, the housing is wrapped outside the entire mute electromagnetic relay, and a base 100 is disposed in the housing.

The shell provides an isolated working environment for the whole mute electromagnetic relay.

Referring to fig. 3, a mounting cavity 111 is disposed inside the spring base 110, and the mounting cavity 111 is used for fixing the fixed spring 200.

The spring base 110 is used for fixing the fixed spring 200.

The dome base 110 is connected to the base 100.

Referring to fig. 3, an actuating cavity 121 is formed in the electromagnet base 120, the electromagnet base 120 is flush with the striking flake base 110, and an extending hole for extending the second connecting plate 320 to the actuating cavity 121 is formed at a connection position of the electromagnet base 120 and the striking flake base 110.

The adsorption end of the electromagnet 500 is connected to the electromagnet base 120, and the iron core of the electromagnet 500 extends to the action cavity 121 to fix the electromagnet 500; the action cavity 121 provides an isolation environment for the action process of the armature plate 300 of the mute relay, so that the action fault of the electromagnetic relay caused by the internal environment of the shell is avoided, the space inside the shell is reduced, and the volume of the mute electromagnetic relay is reduced.

The electromagnet base 120 is connected to the base 100, and the electromagnet base is connected to the dome base 110.

Referring to fig. 3, the fixed elastic sheet 200 is an elastic sheet structure, one end of the fixed elastic sheet 200 is bent to form a rectangular frame, the rectangular frame is disposed in the installation cavity 111, the rectangular frame is connected to the inner wall of the installation cavity 111, the other end of the fixed elastic sheet 200 extends to the outside of the installation cavity 111, and the other end of the fixed elastic sheet 200 is provided with a fixed contact.

The elastic structure of the fixed spring plate 200 can buffer the impact between the fixed contact 210 and the movable contact 410, so as to reduce the vibration generated by the impact between the fixed contact 210 and the movable contact 410, and improve the user experience.

The fixed spring plate 200 is connected to the spring plate base 110 through the matching of the rectangular frame and the mounting cavity 111, so that the vibration generated by the fixed contact point is transmitted to the spring plate base 110.

Referring to fig. 3, the armature plate 300 includes a first connection plate 310 and a second connection plate 320, the first connection plate 310 is inserted into the extension hole and extends into the actuating chamber 121, the first connection plate 310 is disposed corresponding to the electromagnet 500, and the first connection plate 310 is used to contact or separate the armature plate 300 and the electromagnet 500; a through hole is formed in the second connecting plate 320, and the second connecting plate 320 is connected to the first connecting plate 310 to form an L-shaped armature plate 300, and a bent portion is formed at the connection of the first connecting plate 310 and the second connecting plate 320.

The length of the first connecting plate 310 is less than that of the second connecting plate 320, so that when the electromagnet 500 attracts the armature plate 300, the second connecting plate 320 can generate larger displacement by a small stroke of the first connecting plate 310, and the closing of the movable contact 210 and the stationary contact 210 is completed; the armature plate 300 is an action part of the mute electromagnetic relay, and the L-shaped armature plate 300 converts longitudinal displacement into transverse displacement, which is more beneficial to saving space.

The armature plate 300 is rotatably disposed between the dome base 110 and the electromagnet base 120.

Referring to fig. 2 and 3, the movable spring plate 400 is an elastic plate structure, and the movable spring plate 400 is provided with a movable contact 410, and the movable contact 410 is arranged corresponding to the stationary contact 210, so as to ensure the connection reliability between the movable contact 410 and the stationary contact 210.

The movable spring plate 400 is connected to the armature plate 300 through the spring plate connecting plate 420, so that the motion of the armature plate 300 is transmitted to the movable spring plate 400 to complete the closing and opening of the movable contact 410 and the stationary contact 210; and the elastic sheet connecting plate 420 is provided with a plurality of through holes, so that the quality of the elastic sheet connecting plate 420 is reduced, the movable contact 410 and the fixed contact 210 are ensured to be closed and disconnected quickly, the impact force between the movable contact and the fixed contact is reduced, the noise is reduced, and the user experience is improved.

In addition, the free end of the movable spring plate 400 and the fixed end of the fixed spring plate 200 are arranged in a staggered manner.

When the electromagnet 500 acquires magnetism, the movable spring plate 400 is in contact with the fixed spring plate 200, and the movable spring plate 400 deforms; when the electromagnet 500 loses magnetism, the movable spring plate 400 is restored to drive the armature plate 300 to rotate.

Referring to fig. 2 and 3, the electromagnet 500 includes an iron core, an electromagnetic coil wrapped around the iron core, and a yoke 510.

When the electromagnetic coil is energized, the electromagnet 500 obtains magnetism, when the electromagnetic coil is de-energized, the electromagnet 500 loses magnetism, the yoke 510 is connected to one end of the electromagnet 500, and the other end of the yoke 510 extends to the bending portion, and the yoke 510 is disposed adjacent to the first connection plate 310 to limit rotation of the armature plate 300, the yoke 510 can enhance attraction force of the electromagnetic coil, and magnetic lines of force generated by the electromagnetic coil are enclosed inside, so that efficiency of the electromagnet is improved.

The electromagnet 500 has an attracting end connected to the electromagnet base 120, and the iron core penetrates through the electromagnet base 120 and extends to the actuating chamber 121.

Referring to fig. 2 and 3, when the electromagnet 500 obtains magnetism, the electromagnet 500 attracts the first connecting plate 310 to move towards the electromagnet 500, the armature plate 300 rotates around the bending portion as a rotation center, and then the second connecting plate 320 is driven to move towards the fixed spring plate 200, so that the movable contact 410 and the fixed contact 210 are closed, and meanwhile, the movable spring plate 400 deforms and stores elastic potential energy; when the electromagnet 500 loses magnetism, the movable spring piece 400 recovers to release elastic potential energy, and then the first connecting plate 310 is driven to move away from the electromagnet 500, and the armature plate 300 realizes reverse rotation with the bending part as a rotation center, and then the second connecting plate 320 is driven to move towards the yoke 510, so that the movable contact 410 is disconnected from the stationary contact 210.

It should be noted that the armature plate 300 performs a rotation motion with the bent portion as a rotation center by the yoke 510 and the inner wall of the extension hole, and the extension hole has an inclined configuration for allowing the second connection plate 320 to move.

Referring to fig. 2 and 3, first vibration isolators 610 are attached to the outer sidewalls of the dome base 110 and the electromagnet base 120.

First vibration isolation 610 is used for restricting shell fragment base 110 and electromagnet base 120 and passes the vibration in first direction and second direction, has reduced electromagnetic relay's noise, has promoted user experience.

The second vibration isolators 620 are coupled to both sides of the base 100, and the second vibration isolators 620 are disposed between the base 100 and the housing.

Second vibration isolation 620 is used for restricting the transmission vibration of shell fragment base 110 and electromagnet base 120 in the third direction, and second vibration isolation 620 has restricted the transmission of the ascending vibration of third direction to the casing on, and then has reduced electromagnetic relay's noise, has promoted user experience.

It should be noted that first vibration isolation 610 is connected in second vibration isolation 620, has guaranteed that the region between shell fragment base 110, electromagnet base 120 and base 100 all covers the vibration isolation to electromagnetic relay's noise has been reduced, user experience has been promoted.

In the embodiment of the application, when the mute electromagnetic relay is used, the electromagnetic coil is connected to the low-voltage control circuit, the movable contact 410 and the fixed contact 210 are connected to the high-voltage working circuit, and the high-voltage working circuit is controlled by controlling the power loss of the electromagnetic coil.

According to some embodiments of the application, the refrigeration equipment comprises the mute electromagnetic relay described above, and further comprises high-voltage high-current components such as a compressor, a defrosting heating wire, an ice crushing motor and the like, and the mute relay is used for start-stop control of the high-voltage high-current components such as the compressor, the defrosting heating wire, the ice crushing motor and the like.

According to the first invention of this application thinks about, owing to add first vibration isolation, with the lateral wall of first vibration isolation attached to shell fragment base and electro-magnet base to restriction shell fragment base and electro-magnet base pass the vibration in first direction and second direction, so make the electromagnetic relay of this application reduce the vibration noise, and then very big promotion user experience.

According to the second invention concept of the application, the second vibration isolation is additionally arranged and connected to the base to limit the elastic sheet base and the electromagnet base to transmit vibration in the third direction, so that the electromagnetic relay reduces vibration noise, and further greatly improves user experience.

According to the third inventive concept of the present application, since the electromagnet base is improved, the action cavity is provided inside the electromagnet base, and the space occupied by the contact or separation action of the first connecting plate and the electromagnet is provided in the action cavity, the volume of the electromagnetic relay in the present application is reduced, and further the production cost of the electromagnetic relay is reduced.

According to the fourth inventive concept of the present application, since the movement manner of the armature plate is improved, and the movement of the first connecting plate in the third direction is converted into the movement of the second connecting plate in the direction perpendicular to the third direction, the utilization rate of the space of the armature plate in the third direction is improved, the space volume occupied by the armature plate in the direction perpendicular to the third direction is reduced, and further, the volume of the electromagnetic relay in the present application is reduced.

According to the fifth inventive concept of the present application, since the movable contact and the stationary contact are improved and the stationary contact and the movable contact are respectively disposed on the stationary spring plate and the movable spring plate, the impact of the stationary contact and the movable contact is buffered, noise is reduced, user experience is improved, and the stationary spring plate is connected to the spring plate base to transmit the vibration generated by the impact of the stationary contact and the movable contact to the spring plate base.

According to the sixth inventive concept of the present application, since the yoke is modified such that one end of the yoke is extended to the bent portion and the yoke is connected to the electromagnet adjacent to the first connection plate to limit the rotation of the armature plate, the operation failure occurring when the operation of the armature plate exceeds the stroke is prevented.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A mute electromagnetic relay, comprising:

the device comprises a shell, a base and a connecting piece, wherein the base is arranged in the shell;

a dome base connected to the base;

the electromagnet base is connected to the base and is connected with the elastic sheet base;

the fixed elastic sheet is connected with the elastic sheet base and is provided with a static contact;

the armature plate is rotatably arranged between the elastic sheet base and the electromagnet base;

the movable elastic sheet is connected to the armature plate, a movable contact is arranged on the movable elastic sheet, and the static contact is arranged corresponding to the static contact;

the electromagnet is connected to the electromagnet base;

the first vibration isolation is attached to the outer side walls of the elastic sheet base and the electromagnet base so as to limit the elastic sheet base and the electromagnet base from transmitting vibration in a first direction and a second direction;

and the second vibration isolation is connected to the base so as to limit the transmission of vibration of the elastic sheet base and the electromagnet base in a third direction.

2. The silent electromagnetic relay of claim 1, wherein the first isolation mount is coupled to the second isolation mount.

3. The silent electromagnetic relay according to claim 1, wherein an actuation cavity is formed in said electromagnet base, and wherein the core of said electromagnet extends into said actuation cavity.

4. A mute electromagnetic relay according to claim 3, wherein said armature plate comprises:

the first connecting plate is inserted into the action cavity and is arranged corresponding to the electromagnet;

and a second connecting plate connected to the first connecting plate, wherein a bent portion is formed at a connection portion of the first connecting plate and the second connecting plate.

5. A mute electromagnetic relay according to claim 4, wherein the moving spring is connected with a spring connecting plate, and the spring connecting plate is connected with the second connecting plate.

6. The silent electromagnetic relay according to claim 4, wherein the length of the first connection plate is smaller than the length of the second connection plate.

7. The mute electromagnetic relay according to claim 4, further comprising:

a yoke having one end extended to the bent portion and connected to the electromagnet adjacent to the first connection plate to restrict rotation of the armature plate.

8. The silent electromagnetic relay according to claim 7, wherein when said electromagnet is magnetized, said first connecting plate moves toward said electromagnet, and said second connecting plate moves toward said fixed spring piece, so that said movable contact and said stationary contact are closed.

9. The silent electromagnetic relay according to claim 8, wherein when said electromagnet loses its magnetic properties, said first connecting plate moves away from said electromagnet, and said second connecting plate moves toward said yoke, so that said movable contact is disconnected from said stationary contact.

10. A refrigeration device, comprising the mute electromagnetic relay as claimed in any one of claims 1 to 9, wherein the mute relay is used for controlling the on-off of high-voltage high-current components in the refrigeration device.