CN202004439U - Motor overload protector - Google Patents
Motor overload protector Download PDFInfo
- Publication number
- CN202004439U CN202004439U CN2011200577699U CN201120057769U CN202004439U CN 202004439 U CN202004439 U CN 202004439U CN 2011200577699 U CN2011200577699 U CN 2011200577699U CN 201120057769 U CN201120057769 U CN 201120057769U CN 202004439 U CN202004439 U CN 202004439U
- Authority
- CN
- China
- Prior art keywords
- sensing element
- terminal board
- motor overload
- overload protector
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
A motor overload protector particularly relates to a round motor overload protector for a refrigeration compressor, and comprises a cylindrical casing and a bimetallic strip temperature-sensing element, wherein, the casing comprises an end surface; a plurality of terminal mounting holes are formed on the end surface; and terminal plates are installed on the terminal mounting holes. The motor overload protector is characterized in that one end of the bimetallic strip temperature-sensing element is welded or riveted with one terminal plate, a movable contact is arranged at the other end of the bimetallic strip temperature-sensing element, and the movable contact corresponds to a stationary contact in position. Each terminal plate welded or riveted with the bimetallic strip temperature-sensing element is made of metal material with plasticity, the bending angle of each terminal plate is adjusted to lead the movable contact to be in contact with the stationary contact in room temperature so as to generate certain contact pressure, so that the corresponding temperature value (an operation temperature value) can be adjusted when the shape of the bimetallic strip temperature-sensing element changes sharply.
Description
Technical field
The utility model relates to a kind of motor overload protector, particularly a kind of circular motor overload protector that is used for refrigerant compressor.
Background technology
In electrical equipment such as air-conditioning, refrigerator, the power circuit of refrigeration compressor motor is in series with overload protective device usually, is used to prevent that motor from damaging because of overheated or overcurrent.Fig. 1 is a refrigeration compressor motor overload protective device commonly used at present, comprises columnar housing 101, the terminal board 102a that installs in the terminal installing hole of housing end face, 102b and 102c; The housing end face also has the adjusting screw(rod) installing hole, and adjusting screw(rod) 104 is installed in the adjusting screw(rod) installing hole; A bimetal leaf temperature-sensing element 109 is installed on the adjusting screw(rod), the position of bimetal leaf temperature-sensing element 109 is limited by the spacing shim 110 that is riveted on the adjusting screw(rod), bimetallic temperature-sensing element two ends are equipped with moving contact 108a, 108b, the moving contact position is corresponding with the formed fixed contact of the high-conductivity metal position that terminal board 102a and 102c surface are laminated with; A heating wire element 107 is connected between two terminal boards; A binding post 103 is used to connect motor windings, and another binding post 106 is used to connect power supply; Nut 105 is used to lock adjusting screw(rod); Bottom 111 is used for the openend of seal casinghousing.When overload protective device used, the shell nozzle end was pressed close to compressor surface and is installed.Moving contact and fixed contact closure when motor normally moves, source current passes through terminal board, fixed contact, moving contact, the bimetal leaf temperature-sensing element, heating wire element etc. enters motor.When compressor surface overheated; or electric current is excessive causes the heating wire element heating and when causing the temperature of bimetal leaf temperature-sensing element to reach default operating temperature; the bimetal leaf temperature-sensing element can produce deformed movement by a relatively large margin suddenly and moving contact and fixed contact are separated, thereby cuts off the effect that current of electric plays the protection motor.The protector configuration design is circular, make when protector is installed on the compressor case recipient not to restriction.
But; the bimetal leaf temperature-sensing element of this overload protective device commonly used is not to be fixedly mounted on the adjusting screw(rod); it is certain for the axial free gap of adjusting screw(rod) that spacing shim stays for the bimetal leaf temperature-sensing element, and the size in this gap must be more accurate.When this excesssive gap, after the action of bimetal leaf temperature-sensing element makes that moving contact and fixed contact separate, may moving contact and fixed contact accidental switch not reach the purpose of protecting motor owing to axially jumping of bimetal leaf temperature-sensing element makes; When this gap is too small, may influence the performance parameter of protector, protector may not action message or reset when serious.In addition, the installation site of adjusting screw(rod) changes in product assembling or use easily, causes the change of protector performance parameter, and protector just can not reach the protection effect of anticipation in this case, may cause the undesired or heating burnout of machine operation.Simultaneously, this kind protector is because amount of parts is many, and the packaging technology complexity also can reduce reliability of products, and the increase manufacturing cost.
The utility model content
The purpose of this utility model is to provide a kind of designs simplification, reliable operation, and the lower refrigerant compressor motor overload protector of manufacturing cost.
Motor overload protector described in the utility model; comprise columnar housing; housing comprises an end face; end face is provided with several terminal installing holes, and the terminal installing hole is equipped with terminal board, and; overload protective device also comprises the bimetal leaf temperature-sensing element; one end of described bimetal leaf temperature-sensing element and the welding of terminal board or be riveted together, the other end is equipped with moving contact, and moving contact is corresponding with the fixed contact position.Moving contact and fixed contact closure when normal temperature.Too high or the excessive caloric value that causes of electric current is excessive when ambient temperature, make that the shape of bimetal leaf temperature-sensing element produced sudden change, thereby moving contact and fixed contact are separated when the temperature of bimetal leaf temperature-sensing element reached default operating temperature value.Make by having plastic metal material with bimetal leaf temperature-sensing element welding or the terminal board that is riveted together, make moving contact and fixed contact contact and produce certain contact pressure when the normal temperature by the angle of bend of adjusting terminal board, thereby adjust the temperature value of bimetal leaf temperature-sensing element correspondence when shape is suddenlyd change, i.e. the operating temperature value.The utility model overload protective device inner current loops is connected with heating wire usually; during use; with its series connection on the power line of compressor electric motor; and be close to compressor case; when overheat of compressor or current of electric excessive; when causing protector bimetal leaf temperature-sensing element temperature to reach the operating temperature value, the protector action prevents the further heating burnout of motor thereby cut off current of electric.In the described terminal board, one of them terminal board surface has been laminated with electric conductivity preferred metal material and the terminal board of described bimetal leaf temperature-sensing element is installed as fixed contact will be higher than terminal board that fixed contact the is installed installation site at the housing end face in the installation site of housing end face.The openend of described cylindrical shell is provided with band bottom installation step tapering, outer narrow inner width.The center of described bottom caves inward.
The utility model overload protective device is than the existing product designs simplification, and the bimetal leaf temperature-sensing element is installed firmly, so reliable operation, and manufacturing cost is lower.
Description of drawings
Fig. 1 is the structural representation of compressor electric motor overload protective device in the present technology;
Fig. 2 is the utility model motor overload protector structural representation;
Fig. 3 is the shell mechanism schematic diagram of the utility model motor overload protector;
Fig. 4 is the explosive decomposition schematic diagram of the utility model motor overload protector.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figures 2 and 3; motor overload protector described in the utility model; comprise columnar housing 201; housing comprises an end face 201a; end face is provided with three terminal installing hole 201b; 201c; 201d (201d is positioned at the back of hatching); terminal board 207a is installed, 207b, 207c on the terminal installing hole; and; overload protective device also comprises bimetal leaf temperature-sensing element 204, an end of described bimetal leaf temperature-sensing element and terminal board 207b welding or be riveted together, and the other end is equipped with moving contact 205.According to the execution mode of claim 2, the good material of the electric conductivities such as surface coverage silver alloy of terminal board 207a one end is as fixed contact 206, and moving contact 205 is corresponding with fixed contact 206 positions.Make by having plastic metal material with bimetal leaf temperature-sensing element welding or the terminal board 207b that is riveted together, make moving contact and fixed contact contact and produce certain contact pressure when the normal temperature by the angle of bend of adjusting terminal board, thereby adjust the temperature value of bimetal leaf temperature-sensing element correspondence when shape is suddenlyd change, i.e. the operating temperature value.Under moving contact and fixed contact contact condition, the angle of bend difference of terminal board 207b bending part will produce different contact pressures, thereby produce different operating temperature values.A heating wire 203 is welded between terminal board 207a and the 207c, is welded with the external cabling terminal on terminal board 207b and the 207c.Like this, the electric loop of motor overload protector described in the utility model is by external cabling terminal 208a, terminal board 207c; heating wire 203, fixed contact 206, moving contact 205; bimetal leaf temperature-sensing element 204, terminal board 207b, and external cabling terminal 208b is composed in series successively.The openend of housing 201 is covered by bottom 202.According to the execution mode of claim 5, there is an inside depression 202a at the bottom middle part.
By changing the operating temperature value of protector, perhaps change the heating wire material, shape, parameters such as resistance value can be made the overload protective device of different size.
During use; with the series connection of the utility model overload protective device on the compressor electric motor power line; and be close to compressor case and install; overload protective device is machine warming-up effect and heating up by compression, and the motor windings electric current produces heat by the heating wire of overload protective device simultaneously, and is too high or the motor windings electric current is excessive when the compression case temperature; make when the bimetal leaf temperature-sensing element reaches default operating temperature; the motor windings electric current is cut off in the protector action, thereby reaches the effect of protection motor.
The terminal board surface directly is laminated with the good material formation fixed contact of electric conductivity can exempt the other fixed contact of installing on terminal board, reaches the effect of saving material and simplification technology.
For fear of outside dust etc. protector inside component is polluted, protector has bottom usually.The bottom installation step is designed to the structure of back taper, makes that bottom can be in fastening under the situation of not using glue on the housing port.When the depression at bottom middle part helps the product assembling bottom is buckled into the housing port.
Claims (5)
1. motor overload protector; comprise columnar housing; housing comprises an end face, and end face is provided with several terminal installing holes, on the terminal installing hole terminal board is installed; and; overload protective device also comprises the bimetal leaf temperature-sensing element, it is characterized in that, an end of described bimetal leaf temperature-sensing element and the welding of terminal board or be riveted together; the other end is equipped with moving contact, and moving contact is corresponding with the fixed contact position.
2. motor overload protector according to claim 1 is characterized in that, in the described terminal board, one of them terminal board surface has been laminated with electric conductivity preferred metal material as fixed contact.
3. motor overload protector according to claim 1 is characterized in that, the terminal board that described bimetal leaf temperature-sensing element is installed will be higher than terminal board that fixed contact the is installed installation site at the housing end face in the installation site of housing end face.
4. 1 described motor overload protector as requested is characterized in that, the openend of described cylindrical shell is provided with band bottom installation step tapering, outer narrow inner width.
5. motor overload protector according to claim 4 is characterized in that the center of described bottom caves inward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200577699U CN202004439U (en) | 2011-03-07 | 2011-03-07 | Motor overload protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200577699U CN202004439U (en) | 2011-03-07 | 2011-03-07 | Motor overload protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004439U true CN202004439U (en) | 2011-10-05 |
Family
ID=44707166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200577699U Expired - Lifetime CN202004439U (en) | 2011-03-07 | 2011-03-07 | Motor overload protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202004439U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106004796A (en) * | 2016-07-05 | 2016-10-12 | 瑞安市硕维佳电子有限公司 | Windshield wiper motor protector |
| CN112234774A (en) * | 2020-09-29 | 2021-01-15 | 浙江优力仕机电科技股份有限公司 | Motor protection system |
-
2011
- 2011-03-07 CN CN2011200577699U patent/CN202004439U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106004796A (en) * | 2016-07-05 | 2016-10-12 | 瑞安市硕维佳电子有限公司 | Windshield wiper motor protector |
| CN112234774A (en) * | 2020-09-29 | 2021-01-15 | 浙江优力仕机电科技股份有限公司 | Motor protection system |
| CN112234774B (en) * | 2020-09-29 | 2023-06-13 | 浙江优力仕电驱动科技有限公司 | Motor protection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangzhou Senbao Electrical Appliances Co., Ltd. Assignor: Wanbao Refrigeration Group Guangzhou Electrical Appliances Company Ltd. Contract record no.: 2014440000015 Denomination of utility model: Motor overload protector Granted publication date: 20111005 License type: Exclusive License Record date: 20140123 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGZHOU SENBAO ELECTRICAL APPLIANCES CO., LTD. Free format text: FORMER OWNER: GUANGZHOU ELECTRIC APPLIANCE CO., LTD., WANBAO REFRIGERATOR GROUP Effective date: 20140918 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140918 Address after: 510880 Guangzhou, Huadu District, Guangdong Flower Town, East Lake resettlement area, Donghua Road, No. 2 Patentee after: Guangzhou Senbao Electrical Appliances Co., Ltd. Address before: 510880 Guangzhou, Huadu District, Guangdong Flower Town, East Lake resettlement area, Donghua Road, No. 2 Patentee before: Wanbao Refrigeration Group Guangzhou Electrical Appliances Company Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111005 |
|
| CX01 | Expiry of patent term |