Liquid level instrument based on magnetoresistive effect

Abstract

The utility model discloses a liquid level instrument based on magnetoresistive effect, which belongs to the technical field of liquid level monitoring and comprises a water tank, two vertical plates are mounted on the inner wall of the water tank and divide the inside of the water tank into a liquid storage cavity, a communication cavity and a mounting cavity, the communication cavity is positioned between the liquid storage cavity and the mounting cavity, and the mounting cavity is positioned between the liquid storage cavity and the mounting cavity. A communicating port is formed in the lower end of the vertical plate located between the communicating cavity and the liquid storage cavity, a magnetic floating block is placed in the communicating cavity, a liquid level sensor is installed in the installation cavity, a liquid injection port is formed in the upper end of the water tank and communicates with the communicating cavity, and a liquid drainage port is formed in the lower end of the water tank and communicates with the communicating cavity. Vertical guide rails are arranged on the sides, close to each other, of the two vertical plates, sliding blocks are arranged on the two sides of the magnetic floating block, and a flow dividing top is arranged on the upper end face of the magnetic floating block. According to the device, impurities in liquid can be effectively prevented from being accumulated in the communicating cavity, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level monitoring, in particular to a liquid level meter based on magnetoresistance effect. Background Art

[0002] Liquid level sensors based on magnetoresistance effect have advantages over other liquid level sensors, such as small size, high reliability, and wide response range. Such sensors are made into liquid level meters and used in new energy vehicles to measure the cooling liquid level in the thermal management system and provide liquid level alarm signals.

[0003] The existing liquid level meter made of this type of liquid level sensor usually sets a connecting chamber in the container to place the floating component equipped with a magnet in the chamber, and sets a through hole connected to the main chamber at the bottom of the chamber partition. The water level change inside the container is monitored by the connecting vessel principle. Since the liquid in the container will carry certain impurities after participating in the circulation of the entire cooling system, the impurities enter the connecting chamber through the through hole and affect the up and down movement of the floating component. It is inconvenient to clean the connecting chamber due to the obstruction of the partition, and a filter is set at the through hole. If the cleaning is not in place, the through hole may be blocked, resulting in malfunction of the liquid level meter. Utility Model Content

[0004] With regard to the problems existing in the prior art, the utility model provides a liquid level meter based on the magnetoresistance effect, which can effectively prevent impurities in the liquid from accumulating in the connecting cavity and extend the service life of the device.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a liquid level meter based on magnetoresistance effect, comprising a water tank, two vertical plates are installed on the inner wall of the water tank, the two vertical plates divide the inside of the water tank into a liquid storage chamber, a connecting chamber and an installation chamber, the connecting chamber is located between the liquid storage chamber and the installation chamber, a connecting port is provided at the lower end of the vertical plate located between the connecting chamber and the liquid storage chamber, a magnetic float is placed in the connecting chamber, and a liquid level sensor for sensing the position change of the magnetic float is installed in the installation chamber;

[0006] The water tank is provided with a liquid filling port at the upper end, and the liquid filling port is communicated with the connecting cavity. The water tank is provided with a liquid discharge port at the lower end, and the liquid discharge port is located on a side of the liquid storage cavity away from the connecting cavity. At least two vertical guide rails are respectively provided on the sides of the two vertical plates close to each other. At least two sliders cooperating with the vertical guide rails are provided on both sides of the magnetic floating block. A diversion top for draining liquid to the two vertical plates is provided on the upper end surface of the magnetic floating block. A supporting block is installed at the bottom of the magnetic floating block. The magnetic floating block does not contact the bottom of the water tank and the two vertical plates. Impurities and liquid can flow through the gap between the magnetic floating block and the two vertical plates and the water tank, and flow into the liquid storage cavity through the connecting port.

[0007] Preferably, the water tank includes a cover body and a guide plate, the two vertical plates are fixed on the inner wall of the cover body, the liquid injection port is arranged at the upper end of the cover body, one end of the guide plate is fixed on the side wall of the liquid storage cavity away from the vertical plate, the guide plate is inclined upward along the direction of the liquid injection port, the other end of the guide plate is connected to the lower end surfaces of the two vertical plates, the guide plate closes the connecting cavity and the bottom of the installation cavity, and the drain port is located at one end of the guide plate away from the vertical plate.

[0008] Preferably, the length and width of the liquid injection port are both greater than the length and width of the connecting cavity, and the magnetic floating block can be taken out from the liquid injection port.

[0009] Preferably, sealing covers are installed on both the liquid injection port and the liquid discharge port.

[0010] Preferably, the liquid level sensor is detachably mounted inside the mounting cavity, and the lower end of the liquid level sensor extends out from the bottom of the mounting cavity.

[0011] Preferably, the magnetic floating block comprises a magnet and a shell, the slider is mounted on the shell, a placement block is mounted on a side of the shell close to the mounting cavity, a vertical groove is provided on the placement block, and the magnet is mounted inside the vertical groove.

[0012] Preferably, the vertical groove is filled with epoxy resin glue, and the magnet is wrapped inside the epoxy resin glue.

[0013] Preferably, the housing and the slider are both made of corrosion-resistant materials.

[0014] Preferably, the height of the communication port is smaller than the height of the shell.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The utility model sets the liquid injection port above the connecting cavity. Each time the liquid is injected or cleaned, the liquid can flush the entire connecting cavity. The slider and the support block installed on the magnetic float block prevent the magnetic float block from directly contacting the vertical plate and the bottom of the water tank, providing sufficient flow space for the liquid and impurities. The impurities are flushed out from the connecting port by the water flow, flow into the liquid storage cavity and finally discharged from the drain port, which effectively solves the problem of impurities accumulating in the liquid storage cavity and being inconvenient to clean, and prolongs the service life of the device.

[0017] 2. The magnetic float of the utility model can be taken out from the liquid filling port, the liquid level sensor does not contact the liquid in the water tank, and can be taken out from the lower end of the installation cavity. The water tank, the magnetic float and the liquid level sensor can be replaced separately, which reduces the maintenance cost and further extends the service life of the device.

[0018] 3. The utility model places the magnet in the vertical groove of the placement block, and then fills the epoxy resin glue to wrap the magnet, which not only plays the role of fixing the magnet, but also can isolate the magnet from the liquid, avoid the liquid from corroding the magnet, and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of a liquid level meter based on magnetoresistance effect of the utility model;

[0020] Figure 2 It is a top view of a magnetic float of a liquid level meter based on magnetoresistance effect according to the utility model;

[0021] Figure 3 The utility model is a cross-sectional view of a magnetic float of a liquid level meter based on magnetoresistance effect.

[0022] In the figure: 1-cover body, 2-liquid storage chamber, 3-liquid filling port, 4-installation chamber, 5-vertical plate, 6-vertical guide rail, 7-connecting chamber, 8-magnet, 9-shell, 10-liquid level sensor, 11-support block, 12-drainage plate, 13-sealing cover, 14-drainage port, 15-diverter top, 16-slider, 17-placing block, 18-vertical groove. DETAILED DESCRIPTION

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0024] like Figure 1-3 A liquid level meter based on magnetoresistance effect is shown, comprising a water tank, with two vertical plates 5 installed on the inner wall of the water tank, the two vertical plates 5 dividing the interior of the water tank into a liquid storage chamber 2, a connecting chamber 7 and an installation chamber 4, the connecting chamber 7 is located between the liquid storage chamber 2 and the installation chamber 4, a connecting port is provided at the lower end of the vertical plate 5 located between the connecting chamber 7 and the liquid storage chamber 2, a magnetic float is placed in the connecting chamber 7, the height of the connecting port is less than the height of the magnetic float, so as to prevent the magnetic float from leaving the connecting chamber 7 from the connecting hole.

[0025] Specifically, the connecting port connects the connecting cavity 7 with the liquid storage cavity 2. The liquid level in the liquid storage cavity 2 is always the same as the liquid level in the connecting cavity 7. The magnetic float can float on the liquid surface. The liquid level sensor 10 installed in the mounting cavity 4 can indirectly monitor the liquid level of the liquid in the liquid storage tank by monitoring the position change of the inductive magnetic float. Since the mounting cavity 4 is not connected with the connecting cavity 7, the liquid cannot enter the mounting cavity 4. Therefore, the liquid level sensor 10 installed in the mounting cavity 4 does not contact the liquid, thereby extending the service life of the liquid level sensor 10.

[0026] The utility model has a liquid injection port 3 at the upper end of the water tank, which is connected to the connecting cavity 7. The length and width of the liquid injection port 3 are greater than the length and width of the connecting cavity 7. The magnetic float can be taken out from the liquid injection port 3. The liquid level sensor 10 is detachably installed in the cavity 4. The lower end of the liquid level sensor 10 extends from the bottom of the cavity 4 to facilitate the connection of the transmission line. The water tank, the magnetic float and the liquid level sensor 10 can all be replaced separately, which reduces the maintenance cost of the device in the later stage and further extends the service life of the device.

[0027] Specifically, at least two vertical guide rails 6 are respectively provided on the side where the two vertical plates 5 are close to each other, and the magnetic floating block includes a magnet 8 and a shell 9. At least two sliders 16 cooperating with the vertical guide rails 6 are provided on both sides of the shell 9. A placement block 17 is installed on the side of the shell 9 close to the installation cavity 4. The placement block 17 is provided with a vertical groove 18. The magnet 8 is installed inside the vertical groove 18. The vertical guide rail 6 also slides with the slider 16 to guide and limit the up and down floating of the magnetic floating block, so that the side of the shell 9 where the magnet 8 is installed is always facing the installation cavity 4, which is convenient for the liquid level sensor 10 to monitor the water level change;

[0028] Specifically, the vertical groove 18 is filled with epoxy resin glue, and the magnet 8 is wrapped inside the epoxy resin glue, which not only fixes the magnet 8, but also isolates the magnet 8 from the liquid. In addition, the shell 9 and the slider 16 are also made of corrosion-resistant materials, which can effectively reduce the corrosion of the liquid in the water tank to the magnetic float.

[0029] Specifically, the upper end surface of the magnetic float is provided with a diversion top 15 for diverting the liquid to the two vertical plates 5, and a support block 11 is installed at the bottom of the magnetic float. The magnetic float does not contact the bottom of the water tank and the two vertical plates 5. Impurities and liquid can flow through the gap between the magnetic float and the two vertical plates 5 and the water tank, and flow into the liquid storage chamber 2 through the connecting port.

[0030] The utility model provides a drain port 14 at the lower end of the liquid storage chamber 2, and sealing covers 13 are installed on the liquid injection port 3 and the drain port 14. When there is no need to replace the liquid or clean the water tank, the sealing cover 13 can block the liquid injection port 3 and the drain port 14. The water tank includes a cover body 1 and a drain plate 12. The two vertical plates 5 are fixed on the inner wall of the cover body 1. The liquid injection port 3 is arranged at the upper end of the cover body 1. One end of the drain plate 12 is fixed on the side wall of the liquid storage chamber 2 away from the vertical plate 5. The drain plate 12 is inclined upward along the direction of the liquid injection port 3. The other end of the drain plate 12 is connected to the lower end surfaces of the two vertical plates 5. The drain plate 12 closes the bottom of the connecting chamber 7 and the installation chamber 4. The drain port 14 is located at the end of the drain plate 12 away from the vertical plate 5.

[0031] Specifically, each time the liquid is injected or cleaned, the liquid enters the connecting chamber 7 from the liquid injection port 3, and the entire connecting chamber 7 is flushed in the process of flowing downward. The slider 16 and the support block 11 installed on the magnetic float block prevent it from directly contacting the vertical plate 5 and the bottom of the water tank, providing sufficient flow space for the liquid and impurities. The impurities in the connecting chamber 7 are flushed out from the connecting port by the water flow, flow into the liquid storage chamber 2 and flow to the drain port 14 along the inclined guide plate 12. The inside of the water tank can be emptied by simply opening the sealing cover 13 at the drain port 14. The problem of impurities accumulating in the liquid storage chamber 2 and being inconvenient to clean is effectively solved.

[0032] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A liquid level meter based on magnetoresistance effect, characterized in that: It comprises a water tank, two vertical plates are installed on the inner wall of the water tank, the two vertical plates divide the inside of the water tank into a liquid storage chamber, a connecting chamber and an installation chamber, the connecting chamber is located between the liquid storage chamber and the installation chamber, a connecting port is provided at the lower end of the vertical plate located between the connecting chamber and the liquid storage chamber, a magnetic float is placed in the connecting chamber, and a liquid level sensor for sensing the position change of the magnetic float is installed in the installation chamber; The water tank is provided with a liquid filling port at the upper end, and the liquid filling port is communicated with the connecting cavity. The water tank is provided with a liquid discharge port at the lower end, and the liquid discharge port is located on a side of the liquid storage cavity away from the connecting cavity. At least two vertical guide rails are respectively provided on the sides of the two vertical plates close to each other. At least two sliders cooperating with the vertical guide rails are provided on both sides of the magnetic floating block. A diversion top for draining liquid to the two vertical plates is provided on the upper end surface of the magnetic floating block. A supporting block is installed at the bottom of the magnetic floating block. The magnetic floating block does not contact the bottom of the water tank and the two vertical plates. Impurities and liquid can flow through the gap between the magnetic floating block and the two vertical plates and the water tank, and flow into the liquid storage cavity through the connecting port.

2. The liquid level meter based on magnetoresistance effect according to claim 1, characterized in that: The water tank includes a cover body and a guide plate, the two vertical plates are fixed on the inner wall of the cover body, the liquid injection port is arranged at the upper end of the cover body, one end of the guide plate is fixed on the side wall of the liquid storage cavity away from the vertical plate, the guide plate is inclined upward along the direction of the liquid injection port, the other end of the guide plate is connected to the lower end surfaces of the two vertical plates, the guide plate closes the connecting cavity and the bottom of the installation cavity, and the drain port is located at one end of the guide plate away from the vertical plate.

3. The liquid level meter based on magnetoresistance effect according to claim 1, characterized in that: The length and width of the liquid injection port are both greater than the length and width of the connecting cavity, and the magnetic floating block can be taken out from the liquid injection port.

4. The liquid level meter based on magnetoresistance effect according to claim 1, characterized in that: The liquid injection port and the liquid discharge port are both provided with sealing covers.

5. The liquid level meter based on magnetoresistance effect according to claim 1, characterized in that: The liquid level sensor is detachably disposed inside the installation cavity, and the lower end of the liquid level sensor extends out from the bottom of the installation cavity.

6. The liquid level meter based on magnetoresistance effect according to claim 1, characterized in that: The magnetic floating block comprises a magnet and a shell, the slider is mounted on the shell, a placement block is mounted on one side of the shell close to the mounting cavity, a vertical slot is provided on the placement block, and the magnet is mounted inside the vertical slot.

7. The liquid level meter based on magnetoresistance effect according to claim 6, characterized in that: The vertical groove is filled with epoxy resin glue, and the magnet is wrapped inside the epoxy resin glue.

8. The liquid level meter based on magnetoresistance effect according to claim 6, characterized in that: The housing and the slider are both made of corrosion-resistant materials.

9. The liquid level meter based on magnetoresistance effect according to claim 6, characterized in that: The height of the communication port is smaller than the height of the housing.

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