CN210296230U

CN210296230U - Resistance type multi-liquid-level continuous reluctance type liquid level switch

Info

Publication number: CN210296230U
Application number: CN201921502652.XU
Authority: CN
Inventors: 江聪兴; 李天�
Original assignee: Dongguan Erlang Technology Co ltd
Current assignee: Hubei Yilun Technology Co ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-04-10
Anticipated expiration: 2029-09-10

Abstract

The utility model relates to a liquid level switch technical field especially relates to a resistance-type many liquid levels are magnetic resistance formula liquid level switch in succession. The to-be-solved technical problem of the utility model is that the liquid level switch is antidetonation in the transportation, and the quality control degree of difficulty is big and life during production. In order to solve the technical problem, the utility model provides a resistance-type many liquid levels are reluctance type liquid level switch in succession, which comprises a body, the inboard of body is pegged graft and is had PCB, PCB equidistant welding has TMR magnetic control IC and chip resistor, PCB and TMR magnetic control IC and chip resistor's output and input welding have the wire rod, the body all has epoxy with PCB and magnetic control TMR IC and the equal embedment in gap between the chip resistor is adjacent, the separation blade has been cup jointed in the outside left side of body, the outside right side threaded connection of body has the nut, the left side of nut is provided with the packing ring, the floater is installed in the outside of body.

Description

Resistance type multi-liquid-level continuous reluctance type liquid level switch

Technical Field

The utility model relates to a liquid level switch technical field specifically is a resistance-type many liquid levels are continuous type magnetic resistance formula liquid level switch.

Background

The float switch is used as a liquid level control sensor, is widely applied to the fields of water treatment equipment, household appliances, automobile oil level, medical equipment and the like, controls the liquid levels of different media such as water, oil or chemical solution and the like, but the reed pipe type float switch has the following defects in the design, production, transportation and use links:

1. the reed pipe is packaged by glass fiber, and inert gas is filled in the reed pipe or vacuum is pumped. Due to the fragility of the glass fiber, the vibration impact resistance of the glass fiber cannot exceed 30G, or the glass fiber falls to the height of a hard ground and cannot exceed 30cm, otherwise the glass shell of the reed pipe is damaged. Therefore, the principle of light handling and light placing is particularly required during production and use at a client, and measures such as shock resistance are particularly required for packaging during transportation.

2. The length or the volume of the reed pipe is relatively large, and when the multi-water-level switch is designed, the minimum water level interval is relatively large. Larger intervals result in the inability to achieve more detailed water level control requirements, and client machines are limited to the disadvantages of sensors and are not able to develop more complex functions.

3. In the float switch process, the reed switch pins need to be shaped and cut firstly, then are positioned and welded, the process is more, automatic production is difficult to achieve, the production efficiency is lower, meanwhile, the quality control difficulty is high, the number of potential failure factors is large, and the product consistency is poor.

The method is limited to the fragile characteristic of the glass packaging type of the reed switch, and the shaping and pin shearing of the reed switch pins can be automated, but the overall efficiency is still to be improved. The positioning and welding process is not automated or even semi-automated so far.

Another hidden danger of the glass package of the reed switch is that the damage is usually difficult to detect, the damage is difficult to discriminate through testing in a short time, and the fault is gradually revealed after the client is used for a period of time, so that the brand image of a client product is influenced, the after-sale pressure and even the economic dispute are brought, and the company image and the sales pressure of the client are influenced finally.

4. The reed switch essentially acts as a mechanical switch, and is physically contacted and disconnected, and on the other hand, the reed switch has a response frequency much higher than that of a common mechanical switch, but on the other hand, the load capacity of the reed switch is much lower than that of the mechanical switch. The life of the reed switch is affected by two factors, namely the electrical life and the mechanical life. For mechanical life, it is critical that the switch be normally on and off. The mechanical life of a reed switch is typically much greater than its electrical life, which depends on the degree of degradation of the contact material of the reed end contacts. It can be said that the degree of aging of the contact material of the reed end of the reed pipe determines the useful life of the reed pipe. Usually, the load capacity of the reed switch is measured by a pure resistive load, the load capacity is mainly measured by 1W, 5W, 10W, 20W, 50W and the like on the market, the applicable voltages are respectively 24V, 100V, 200V, 250V and 300V, and the maximum used currents are respectively 0.1A, 0.25A, 0.5A and 0.7A. The client side often has misuse conditions in use due to misinterpretation of reed switch parameters or insufficient knowledge of the reed switch. In fact, the most reliable usage of the reed switch is as signal transmission, the voltage of the reed switch is usually 5V, and the current of the reed switch is less than 10mA, so that the service life of the float switch can be ensured to meet the service life of a machine. However, a considerable part of clients try to use the reed switch as a relay, the load is relatively large, and meanwhile the relay is not a pure resistive load, the instantaneous impact current of the load often exceeds a rated value by several times, or the service voltage of the load is close to or reaches the maximum service voltage of the reed switch, in any case, the aging speed of the contact material of the reed switch is quite remarkable, the service life of the contact material is rapidly reduced in practical use, even the contact material of the reed switch is directly burned and bonded, so that a serious result is caused, and a large area of failure often occurs in a new client machine after the contact material is sold in the market.

5. The dry spring is used as an electronic device, but the manufacturing process difficulty is very high, and the difficulties include pin shaping, position control, contact material, especially encapsulation and sintering of a glass body, which results in that the number of manufacturers in the world can be increased and the quality control is better. The other difficulty of reed switch production is screening, the sensitivity distribution range of each batch of reed switches is large, and batch production with the same high-precision sensitivity cannot be realized. The reed switches with different sensitivities can only be screened out from the reed switches produced in batches, so that the overall production efficiency is not high, the production cost is increased, meanwhile, the total production quantity is not enough, and the market demand can not be met. The market situation of short supply and the inclination of reed switch production capacity to the automobile market in recent years lead to serious shortage of reed switches in the household appliance market, and the price is increased at high speed, thereby causing huge cost pressure and even survival pressure on sensor manufacturers.

In conclusion, the float switch needs to be capable of replacing a reed switch, can effectively overcome the defects of the reed switch, is suitable for a novel magnetic induction device for mass production, is the requirement of market situation, and is a trigger for realizing the update of the float switch.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides a resistance-type many liquid levels are magnetic resistance formula liquid level switch in succession, have solved the problem of mentioning in the above background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a resistance-type many liquid levels are continuous type reluctance type liquid level switch, includes the body, the inboard of body is pegged graft and is had PCB, PCB equidistant welding has TMR magnetic control IC and chip resistor, PCB and TMR magnetic control IC and chip resistor's output and input welding have the wire rod, the body all encapsulates epoxy with PCB and TMR magnetic control IC and the adjacent gap between chip resistor.

The separation blade has been cup jointed in the outside left side of body, the outside right side threaded connection of body has the nut, the left side of nut is provided with the packing ring, the floater is installed in the outside of body.

Further preferably, the PCB, the TMR magnetic control IC and the chip resistor are welded with the electronic element.

Further preferably, the PCB is mounted on a central axis inside the body.

Further preferably, a stopper is disposed on an outer side of the body, and a right side of the stopper contacts the gasket.

(III) advantageous effects

The utility model provides a resistance-type many liquid levels are continuous type magnetic resistance formula liquid level switch possesses following beneficial effect:

1. high sensitivity, the strength of the detected signal is weaker and weaker, which requires that the sensitivity of the magnetic sensor is greatly improved. The application aspects comprise current sensors, angle sensors, gear sensors and space environment measurement.

2. Temperature stability, and more application fields require that the working environment of the sensor is more and more severe, which requires that the magnetic sensor must have good temperature stability, and industrial applications include the automotive electronics industry.

3. The sensor has good anti-interference performance, and the use environment of the sensor in many fields does not have any shielding. Including automotive electronics, water meters, and the like.

4. Miniaturization, integration and intellectualization, and chip-level integration, module-level integration and product-level integration are needed to meet the requirements.

5. The high-frequency characteristic requires that the working frequency of the sensor is higher and higher along with the popularization of application fields, wherein the application fields comprise water meters, automobile electronic industries and information recording industries.

6. The low-power consumption, many fields require the power consumption of sensor itself to be extremely low, can prolong the life of sensor. The magnetic biochip can be used for implanting in the body, a compass and the like.

7. The utility model discloses the warning and the measurement demand of the many water levels of the single floater control high accuracy of mainly being applicable to utilize.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the TMR magnetic control IC and the chip resistor of the present invention.

In the figure: the device comprises a body 1, a PCB2, a TMR 3 magnetic control IC, a chip resistor 4, a wire rod 5, epoxy resin 5, a baffle plate 6, a nut 7, a washer 8 and a floating ball 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a resistance type multi-liquid level continuous reluctance type liquid level switch comprises a body 1, a PCB2 is inserted into the inner side of the body 1, TMR magnetic control ICs and a chip resistor 3 are welded on the PCB2 at equal intervals, different resistance values can be output by utilizing the resistance series characteristic, when the water level rises, a floating ball 9 floats, under the action of a side magnet magnetic field in the floating ball, the TMR is switched on and off, different water levels are judged by continuously sampling different resistance values, a floating ball 9 continuously controls a plurality of water levels, 9PCB2, the TMR magnetic control ICs and the chip resistor 3 are welded with an electronic element, a PCB2 is installed on a central axis in the body 1, wires 4 are welded on the output ends and the input ends of the PCB2, the TMR magnetic control ICs and the chip resistor 3, gaps between the body 1 and the PCB2 as well as between the TMR magnetic control ICs and the chip resistor 3 are all encapsulated with epoxy resin 5, a separation, the right side of the outside of the body 1 is in threaded connection with a nut 7, the left side of the nut 7 is provided with a gasket 8, the outer side of the body 1 is provided with a floating ball, the outer side of the body 1 is provided with a stopper, and the right side of the stopper is in contact with the gasket 8.

(1) The TMR magnetron IC and the chip resistor 3 have very strong impact resistance. The utility model discloses TMR magnetic control IC and chip resistor 3 that use have multiple encapsulation model, SOT-23-3 encapsulation, TO-92S encapsulation, LGA-3L encapsulation, and the packaging body is epoxy 5, and its structural strength is big, and has very outstanding shock resistance, need not take special shock resistance or shock-proof measures when production, transportation, use.

(2) The TMR magnetic control IC and the chip resistor 3 have smaller packaging volume, and when a multi-water-level switch is designed, the minimum water level interval is smaller, so that more water levels can be designed in a limited space; the packaging size of the TMR is smaller, the design of the PCB2 is more convenient, the limitation of the size limitation of the conventional reed switch is broken through, more dense sensing devices can be arranged, the high-precision water level control capability is realized, and the high-end and complex functions are more easily realized.

(3) When the TMR magnetic control IC and the chip resistor 3 are packaged by SOT-23-3 or LGA-3L chip, the automatic production is very easy to realize, the production efficiency can be greatly improved, meanwhile, the quality control is relatively easy, the potential failure factors are fewer, and the product consistency is relatively good; the IC packaged by the patch is very easy to realize large-scale production, and meanwhile, the quality control of the product is easy due to a mature production process, so that the quality control cost of the product can be greatly reduced, and the backward production mode with intensive manpower is changed in the industry.

(4) The lifetime of the TMR magneto IC and the chip resistor 3 depends mainly on the aging of the chip, i.e. the time. The chip has extremely low power consumption, is in microampere level, and has a service life of at least more than 10 ten thousand hours. The current TMR chip manufacturing process can meet the wide voltage application range of 1.5V-40V and meet the requirements of household and industrial signal transmission.

(5) Based on the manufacturing process of the chip, the TMR magnetic control IC and the chip resistor 3 can be manufactured in batch with high quality, large scale and stable performance, the cost is easier to control, the increasing requirement of the household appliance industry which is developing towards intellectualization can be met, and meanwhile, the TMR magnetic control IC and the chip resistor have better potential in the development direction of miniaturization, integration and high-precision control.

Claims

1. The utility model provides a resistance-type many liquid levels are continuous type magnetic resistance formula liquid level switch, includes body (1), its characterized in that: the inner side of the body (1) is spliced with a PCB (2), the PCB (2) is welded with a TMR magnetic control IC and a chip resistor (3) at equal intervals, output ends and input ends of the PCB (2) and the TMR magnetic control IC and the chip resistor (3) are welded with wires (4), and gaps between the body (1) and the PCB (2) and between the body (1) and the TMR magnetic control IC and between the body (3) and the chip resistor (3) are filled with epoxy resin (5) in a sealing mode;

separation blade (6) have been cup jointed on the outside left side of body (1), the outside right side threaded connection of body (1) has nut (7), the left side of nut (7) is provided with packing ring (8), floater (9) are installed in the outside of body (1).

2. The resistive multi-level continuous reluctance type liquid level switch according to claim 1, wherein: and the PCB (2), the TMR magnetic control IC and the chip resistor (3) are welded with the electronic element.

3. The resistive multi-level continuous reluctance type liquid level switch according to claim 1, wherein: the PCB (2) is installed on a central axis inside the body (1).

4. The resistive multi-level continuous reluctance type liquid level switch according to claim 1, wherein: a stopper is arranged on the outer side of the body (1), and the right side of the stopper is in contact with the gasket (8).